1

UNITED STATES ENVIRONMENTAL PROTECTION AGENCY

 WASHINGTON, D.C. 20460

 Mail Code 5401G

 AUGUST 23, 1999

 OFFICE OF 

SOLID WASTE AND EMERGENCY

 RESPONSE

MEMORANDUM

SUBJECT: List of Leak Detection Evaluations for Underground Storage Tank Systems -

Sixth Edition

FROM: Sammy Ng, Acting Director / s /

Office of Underground Storage Tanks

TO: Addressees (see below) and All Interested Parties

This cover memo transmits the attached list and provides additional information about its 

appropriate use and about EPA's involvement with it. Previous editions of the List of Leak 

Detection Evaluations have been very helpful tools to the underground storage tank (UST) 

community, and we are pleased to make this new edition available.

The List and Its Use

The List of Leak Detection Evaluations is based on reviews by the independent National 

Work Group on Leak Detection Evaluations, consisting of state and EPA UST program staff. 

Therefore, this List is not an EPA list. Furthermore, neither EPA nor the work group approve or 

will approve leak detection systems for compliance in any particular location. Approval or 

acceptance of systems is the responsibility of the implementing agency -- in most cases the state 

environmental agency. You should contact this agency regarding the approval or acceptance of 

leak detection systems in a particular area.

The List contains information on underground storage tank and piping leak detection 

system evaluations that have met certain criteria. To be included, an evaluation must have been 

performed by an independent third party, in accordance with EPA or equivalent test procedure 

(protocol), and with leak rates blind to the evaluator. The List includes evaluations that followed 

either an EPA protocol, a national voluntary consensus standard, or other accepted test 

procedures developed by an independent third party. 

There is an Under Review section that lists evaluations about which the work group has 

received information, and is either reviewing or has requested additional information needed to 

clarify the evaluation. Listing of an evaluation as "under review" in no way implies that 

the evaluation does or does not meet the review criteria.
2

The List also includes a separate listing of protocols under which listed evaluations were 

performed. Finally, some optional maintenance checklists are included; these can help users get 

the most out of leak detection systems.

We believe that the List will continue to be of great benefit to those throughout the UST 

community. However, please remember that it has inherent limitations. It is based on evaluations, 

which are one-time events, often conducted in a lab setting according to protocols that do not test 

all aspects of a system. Therefore, appearance on the List does not mean that a particular system 

will work or comply with regulations at any particular site. For these reasons, the List cannot be 

the final word; you should base your decisions on all available sources of information. 

Distribution

The work group updates the List periodically, as new evaluations and information are 

reviewed. The most recent version is always available in electronic form for downloading, 

viewing, and printing via the Internet at:

http://www.epa.gov/OUST/pubs/index.htm 

It is available in Adobe’s Portable Document Format (PDF), Microsoft Word (the original 

version), and WordPerfect 5.1. For help with access, contact Hal White at white.hal@epa.gov or 

at (703)603-7177.

Related Evaluation Issues

The List of Leak Detection Evaluations addresses important needs, but there are multiple 

other concerns regarding leak detection that we believe need to be better addressed. One need is 

for better compliance with the federal, state, and local requirements to conduct leak detection. 

The best system is of no use if it is not even used.

Another need is for proper operation and maintenance. The federal regulations require 

that leak detection systems be “installed, calibrated, operated and maintained in accordance with 

the manufacturer’s instructions” (40 CFR 280.40(a)(2)), and it makes good business sense to 

perform scheduled maintenance. Despite this, operation and maintenance are often not done. 

Thus we have an initiative on Improving Operation and Maintenance. To learn more, please

contact Paul Miller at miller.paul@epa.gov or (703)603-7165.

Finally, there are issues related to the evaluation process, the original EPA standard test 

procedures (also called the evaluation protocols), and new technologies and protocols. One issue 

is whether revisions are needed to one or more of the existing protocols, to reflect advances in 

technology, changes in the way UST systems are operated, advances in the collective knowledge 

base about leak detection, and recommendations that regulators strengthen leak prevention and 

detection. We welcome input from those familiar with the third-party evaluation process and with 

the various protocols available for use, both EPA’s and those developed by other organizations. 

The contact is David Wiley; contact information follows.
3

Additional information

If you have an evaluation to submit or if you have comments about a particular listing, 

please see the instructions in the attached memorandum from the Work Group’s Chair. 

Comments are always welcomed.

I hope that our distribution of this package is helpful to you. If you have questions about 

our distribution, please contact David Wiley. He may be reached by e-mail at 

wiley.david@epa.gov, by phone at (703)603-7178, by fax at (703)603-9163, or by U.S. Mail at the 

letterhead address above. Please note that our phone numbers and mail code may change in 

2000.

Attachment: List of Leak Detection Evaluations for Underground Storage Tank Systems -

Sixth Edition

Addressees:

UST/LUST Regional Program Managers

State UST Contacts

Anthony Tafuri, NRMRL Edison

Vendors appearing on List of Leak Detection Evaluations

Members of National Work Group on Leak Detection Evaluations

Stephen Crimaudo, Ass'n of State and Territorial Solid Waste Mgt. Officials

American Society Of Petroleum Operations Engineers

Prentiss Searles, American Petroleum Institute

Arlene Alexander, National Association of Convenience Stores

Thomas West, National Association of Texaco Wholesalers

Bob Renkes, Petroleum Equipment Institute

Melissa Young, Petroleum Marketers Association of America

Mark Morgan, Petroleum Transportation & Storage Association

Roy Littlefield, Service Station Dealers of America

Tom Osborne, Society of Independent Gasoline Marketers of America

cc (cover only):

Regional Program Managers’ Supervisors

Kathy Nam, OGC

Joan Olmstead, OECA

OUST Management Team

OUST Desk Officers
4

 [THIS PAGE INTENTIONALLY LEFT BLANK]
5

 ALABAMA

 DEPARTMENT OF ENVIRONMENTAL MANAGEMENT

ADEM

August 23, 1999

MEMORANDUM

TO: Vendors of Leak Detection Equipment/Systems and Other Interested Parties

FROM: Curt D. Johnson, NWGLDE Chairperson

RE: National Work Group on Leak Detection Evaluation’s (NWGLDE) List of Leak Detection

Evaluations for underground storage tank systems - Sixth Edition

Following this memo (and the attachments), you will find the latest edition of our list. Please note that many data 

sheets have been combined where possible and some less critical information dropped in order to streamline the list.

We would appreciate any comments you have concerning the list. Please provide comment by using the list of leak 

detection evaluations user survey and send survey to me at the address, phone number, fax number or e-mail 

address listed on the next page.

If you need to contact other members in the work group, the same information is included for them on the next page. 

Also, the work group team and team leaders are listed on the page following the member list to help you determine 

who you may need to contact.

Please send new evaluations and/or protocols to be evaluated by the work group to the team leader and all the 

members of the team. To enable the work group to properly review the third-party tests, one (1) copy of all 

applicable information indicated in the enclosed "Leak Detection Equipment Review - Document List" must be sent to 

the team leader and each team member. 

Since the first draft list was sent out back in January of 1995, the list has sometimes been referred to as the "EPA 

work group list of approved leak detection equipment". The work group and EPA are concerned that similar 

statements may begin to appear in sales literature distributed by vendors. We request that you do not refer to the list 

in this way for the following reasons.

1. This is not an EPA or EPA work group list. This draft list was prepared by an independent work 

group consisting of state and EPA members.

2. Neither EPA nor the work group approve leak detection equipment or procedures. The draft 

list does not include "approved" leak detection equipment/procedures. It includes leak detection 

equipment/procedures that the work group reviewed and confirmed, were third-party tested in accordance with 

either an EPA or other acceptable test protocol, and the test confirmed that the equipment/procedures met EPA 

performance standards under test conditions. Approval or acceptance of leak detection equipment and procedures 

is the responsibility of the implementing agency, which in most cases is the state environmental agency.

We try to send only 1 copy of the odd number list editions to each company/agency location on our mailing list. If you 

received more than 1 copy at your location, or if the copy needs to be sent to another person, please notify me and 

we will make the necessary corrections.

Attachments: Work Group Members, Work Group Teams, Leak Detection Equipment Review Document List, List of 

Leak Detection Evaluations User Survey, Latest Edition of List of Leak Detection Evaluations for UST Systems
6

[THIS PAGE INTENTIONALLY LEFT BLANK]
7

WORK GROUP MEMBERS

MEMBER ADDRESS PHONE/FAX/E-MAIL

Curt D. Johnson Alabama Department of Environmental 

Management 

PO Box 301463 

Montgomery, AL 36130-1463

(334) 271-7986 

Fax (334) 270-5631

cdj@adem.state.al.us

Beth DeHaas Maine Department of Environmental 

Protection 

Statehouse Station No. 17 

Augusta, ME 04333

(207) 287-2651 

Fax (207) 287-7826

beth.dehaas@state.me.us

Russ 

Brauksieck

New York State Department of 

Environmental Conservation 

50 Wolf Rd., Room 360 

Albany, NY 12233-3750

(518) 457-4351 

Fax (518) 457-4332

rxbrauks@gw.dec.state.ny.us

David Wiley USEPA MAILING 

401 M St. Southwest Davis Hwy 

5402G 13th floor 

Washington, DC 20460 Arlington, VA 2202

(703) 603-7178

Fax (703) 603-9163

wiley.david@epamail.epa.gov

Shahla 

Farahnak 

California State Water Resource Control 

Board Division of Clean Water Program 

PO Box 944212 

Sacramento, CA 94244-2120

(916) 227-4350 

Fax (916) 227-4349

farahnas@gwgate.swrcb.ca.gov

Jeff Tobin State of Montana

Department of Environmental Quality

Box 200901

Helena, MT 59620-0901

(406) 444-1417 

Fax (406) 444-1902

tobin@mt.net

Edward Olson Minnesota Pollution Control Agency

1230 S. Victory Dr.

Mankato, MN 56001-5308

(507) 389-5235

Fax (507) 389-5422

edward.olson@pca.state.mn.us

Jennifer 

Bravinder

U.S. EPA Region 9

Underground Storage Tanks Office 

WST-8

75 Hawthorne Street

San Francisco, CA 94105

(415) 744-2077

Fax (415) 744-1044

bravinder.jennifer@epamail.epa.gov

John Kneece South Carolina Department of Health and 

Environmental Control

2600 Bull Street

Columbia, SC 29201

(803) 898-4364

Fax (803) 898-4330

kneeceje@columb26.dhec.state.sc.us

Jon Reeder Florida Department of Environmental 

Protection

3804 Coconut Palm Drive

Tampa, FL 33619-8318

(813) 744-6100 Ext. 472

Fax (813) 744-6125

jon.reeder@dep.state.fl.us
8

[THIS PAGE INTENTIONALLY LEFT BLANK]
9

WORK GROUP TEAMS

TEAM LEADER MEMBERS

Automatic Tank Gauging (ATG) and Volumetric 

Tank Tightness Test (VTTT) Methods

Russ Brauksieck Beth DeHaas

Ed Olson

Continuous In-Tank Leak Detection Methods Shahla Farahnak Beth DeHaas

Jennifer Bravinder

Non-Volumetric Tank Tightness Test Methods Jeff Tobin Shahla Farahnak

John Kneece

Pipeline Leak Detection Methods Jeff Tobin John Kneece

Ed Olson

Statistical Inventory Reconciliation (SIR) Methods Jon Reeder

Jennifer Bravinder

David Wiley

John Kneece

Sensor and Vacuum Methods David Wiley Jon Reeder

List Administration and Surveys Curt Johnson David Wiley

 
10

[THIS PAGE INTENTIONALLY LEFT BLANK]
11

LEAK DETECTION EQUIPMENT REVIEW - DOCUMENT LIST 

This information lists the documentation required for review of third-party evaluation of underground 

storage tank and line leak detection equipment/systems. 

1. A complete third-party evaluation report, including: 

 a. Details of the evaluation procedure if the EPA standard procedure was not used for the 

evaluation. If the EPA evaluation procedure was used, list any deviations or modifications to the 

procedure. 

 b. A complete set of all the EPA required attachment sheets. 

 c. Individual test logs and/or field notes. 

 d. Statistical calculations and any applicable graphs or charts generated during the evaluation.

 e. A statement from the evaluator confirming that all equipment at the test site was properly 

maintained and calibrated to the level of accuracy necessary for a valid evaluation.

 2. An outline of the manufacturer’s operating procedures for the equipment/system. The

summary procedure must be dated and include a revision number, if applicable. A copy of the 

summary procedure must be provided to the third-party evaluator for enclosure in the report. Also 

required is a statement from the manufacturer confirming the use of the submitted procedure 

during the evaluation.

 3. A complete installation/operations manual for the equipment/system.

 4. A sample of the test report (including field work-sheets) which will be submitted to the 

owner/local implementing agency.

 5. An outline of the test procedures in high groundwater areas. These procedures should be

reviewed for adequacy by the third-party evaluator and a statement to that effect should be 

included with the report.

 6. An outline of the test procedures for manifold tank systems. These procedures should be

reviewed for adequacy by the third-party evaluator and a statement to that effect should be 

included with the report.

 7. An affidavit from the manufacturer confirming that there are no mutual financial interests 

between the equipment manufacturer and the third-party evaluator.

 8. A resume, including all applicable formal training and experience, from personnel who 

conducted the evaluation.

 9. Equipment calibration procedures and manufacturer recommended schedule of calibration.
12

LEAK DETECTION EQUIPMENT REVIEW - DOCUMENT LIST (Continued)

10. The name, address, and phone number of the technical personnel serving as the 

manufacturer’s representative for the response to the regulatory agency questions on the 

equipment/system.

11. Correspondence letters from state agencies who have reviewed the equipment/system.

12. The following documentation for all permanently-installed leak detection equipment:

a. A list of installers authorized by the manufacturer to install the leak detection equipment.

b. A list of service personnel authorized by the manufacturer to conduct the annual functional 

test (required for all leak detection equipment).

c. An outline of the maintenance procedure (including a list of the parts or functions of the 

system to be checked, calibrated, or programmed) for the annual functional test by authorized 

service personnel.

d. An outline (1-2 pages) “Equipment Check Guidelines for Inspectors” prepared by the 

manufacturer. This summary should guide local agency inspectors on proper field procedures to 

follow when inspecting equipment for proper operation, for attempting to access the stored history 

(for alarms or failed tests) to determine compliance with state requirements.

e. A sample of the reports generated and/or printed by the equipment (for all equipment 

models), and an explanation of the items in the report, if not self-explanatory.

f. Information on how the control panel modules connected to the various probes are labeled. 

The information on the panel should be directly comparable to the equipment name, 

model/part/probe number which will be included in the committee’s list. If necessary, a 

permanent label containing that information should be affixed to the panel.

13. The following documentation for the systems using tracer analysis:

a. The name and certification of the laboratory analyzing vapor samples.

b. Quality Assurance Manual of the laboratory.

c. The method and amount of tracer injection.

d. The vapor sample collection method and chain of custody records.

e. The third-party certification for capability of the system to detect leaks from the ullage portion 

of the tank.
13

LIST OF LEAK DETECTION EVALUATIONS USER SURVEY

1. I work in the following state(s) 

2. My main job function is (circle one)

Regulatory (Circle M for manager, I for inspector) Leak Detection Vendor (manufacturer and/or service co.)

Financial responsibility insurance/assurance agency Tank owner/operator

Other (specify)

3. I have used the list while working with UST systems and release detection. (YES) (NO)

Comments:

4. I have reviewed the National Work Group on Leak Detection Evaluations' list and find it: (circle all that 

apply)

Easy to follow Good format Useful for my work Up to date Complete Accurate

Difficult to follow Poor format Of no use for my work Outdated Incomplete Inaccurate

Comments:

5. I would benefit from receiving training on the use and applications of the list. (YES) (NO)

Comments:

6. I feel the National Work Group on Leak Detection Evaluations' list has improved upon the quality of 

leak detection equipment and its use in my state(s). (YES) (NO)

Comments:

7. I would like for the National Work Group on Leak Detection Evaluations to continue to focus on 

improving the quality of leak detection equipment and services by continuing to review third party 

evaluations. (YES) (NO)

Comments:

8. I still have the following concerns about leak detection equipment in my state (circle all that apply).

Equipment quality

Improper equipment installation

Improper equipment servicing/calibration/maintenance (Owner or Service Co.)

Inadequate field services (tank and line tightness testing, sample collection, etc.)

Inadequate regulatory authority for addressing vendors/service companies which provides services of 

questionable quality.

Comments:

9. I have the following suggestions on how the Work Group could provide further assistance to me in 

addressing my concerns related to leak detection.

10. I have the following additional comments on the list (negative, positive, and suggestions for 

improvement are welcomed, attach additional pages if more space is needed).

PLEASE SEND COMPLETED SURVEY TO: CURT JOHNSON, ALABAMA DEPARTMENT OF 

ENVIRONMENTAL MANAGEMENT P.O. BOX 301463, MONTGOMERY, AL 36130-1463
14

[THIS PAGE INTENTIONALLY LEFT BLANK]
SIXTH EDITION

LIST OF LEAK DETECTION EVALUATIONS FOR

UNDERGROUND STORAGE TANK (UST)

SYSTEMS

August 23, 1999
[THIS PAGE INTENTIONALLY LEFT BLANK]
DISCLAIMER

This list of Leak Detection Evaluations was prepared by a work 

group consisting of State and EPA members and is limited to 

evaluations of leak detection equipment and procedures, or 

systems, that the work group has completed review of, and that 

were conducted by an independent third-party evaluator with leak 

rates blind to the vendor. This list includes evaluations conducted 

in accordance with either EPA Standard Test Procedures for 

Evaluating Leak Detection Methods (EPA/530/UST-90/004 through 

010) or other acceptable protocols. The list includes an Under 

Review category, for evaluations which the work group’s review 

could not be finalized prior to publication. The listing of system 

evaluations as “under review” in no way implies that the evaluations 

do or do not meet the criteria for which evaluations are reviewed.
[THIS PAGE INTENTIONALLY LEFT BLANK]
i

TABLE OF CONTENTS

PART I - LEAK DETECTION TEST METHODS AND EQUIPMENT 1

(Alphabetical by test method, then by vendor, next by equipment model, 

and finally by leak rate or operating principle.)

AUTOMATIC ELECTRONIC LINE LEAK DETECTOR 2

AUTOMATIC MECHANICAL LINE LEAK DETECTOR 4

AUTOMATIC TANK GAUGING METHOD 4

BULK FIELD-CONSTRUCTED TANK LEAK DETECTION METHOD 7

CONTINUOUS IN-TANK LEAK DETECTION METHOD 7

DOUBLE WALLED TANK TIGHTNESS TEST METHOD 7

LARGE DIAMETER PIPELINE LEAK DETECTOR 8

LINE TIGHTNESS TEST METHOD 8

LIQUID-PHASE INTERSTITIAL DETECTOR 9

LIQUID-PHASE OUT-OF-TANK PRODUCT DETECTOR 11

NON-VOLUMETRIC TANK TIGHTNESS TEST METHOD (TRACER) 12

NON-VOLUMETRIC TANK TIGHTNESS TEST METHOD (ULLAGE) 12

NON-VOLUMETRIC TANK TIGHTNESS TEST METHOD (VACUUM) 13

PRESSURE/VACUUM INTERSTITIAL MONITOR 13

STATISTICAL INVENTORY RECONCILIATION TEST METHOD (QUALITATIVE) 14

STATISTICAL INVENTORY RECONCILIATION TEST METHOD (QUANTITATIVE) 14

VAPOR-PHASE OUT-OF-TANK PRODUCT DETECTOR 14

VOLUMETRIC TANK TIGHTNESS TEST METHOD (OVERFILL) 15

VOLUMETRIC TANK TIGHTNESS TEST METHOD (OVERFILL) (Edison Lab Protocol) 15

VOLUMETRIC TANK TIGHTNESS TEST METHOD (UNDERFILL) 15
ii

TABLE OF CONTENTS

PART II - LEAK DETECTION EQUIPMENT SPECIFICATIONS 17

(Alphabetical by vendor, then by test method, next by equipment model,

and finally by leak rate.)

Absolute Precision Testing Systems 18

Advanced Tank Technology, Inc. 19

Advanced Telemetrics 20

Agar Corp. 21

Alert Technologies, Inc. 22

Andover Controls Corp. 26

Armstrong Monitoring Corporation 30

ASTTest Services Inc. 32

Beaudreau Electronics, Inc. 33

Bell Avon, Inc. 35

Brooks KWK, Inc. 36

Caldon, Inc. 37

Caldwell Systems Corporation 38

Campo/Miller, Inc. 41

Coggins Systems, Inc. 47

Computerizing, Inc. 49

Containment Solutions, Inc. (formerly Fluid Containment and O/C Tanks) 50

Control Engineers 52

EBW, Inc. 56

EFA Technologies, Inc. 60

Egemin Naamloze Vennootschap 61

Emco Electronics, Tuthill Corp. 63

Engineered Systems, Inc. 76

Entropy Limited 77

Environment and Safety 79

Environmental Fuel Systems, Inc. 80
iii

EnviroSIR LLC 81

TABLE OF CONTENTS

PART II - LEAK DETECTION EQUIPMENT SPECIFICATIONS

(Continued)

FCI Environmental, Inc. 82

FDR Services, Inc. 84

FE Petro, Inc. 85

Gasboy International (formerly William M. Wilson's Sons) 88

Gems Sensors Inc. (formerly IMO Industries Inc.) 89

Gilbarco Environmental Products 90

Hasstech 115

Heath Consultants, Inc. 128

Horner EZY CHECK 131

Horner Products Inc. 137

HT Technologies, Inc. 141

Ibex Industries 142

INCON Intelligent Controls, Inc. 143

Keekor Environmental Products 156

Leak Detection Systems, Inc 157

Mallory Controls 158

Marley Pump Co. 160

Mass Technology Corp. 181

Mine Safety Appliances 184

NESCO (formerly Arizona Instrument Corp.) 185

Omntec/Electro Levels Mfg., Inc. 189

One Plus Corp. 192

Patriot Sensors and Controls Corp. (formerly MagneTek) 193

PermAlert 197

Petro Vend, Inc. 201

Pneumercator Company, Inc. 208
iv

ProTank, Inc. 212

TABLE OF CONTENTS

PART II - LEAK DETECTION EQUIPMENT SPECIFICATIONS

(Continued)

Raychem Corp. 220

Ronan Engineering Co. 221

Schuster Instruments 226

Simmons Corp. 227

SIR International, Inc. 229

SIR Monitor (formerly Environmental Management Technologies) 230

Sir Phoenix, Inc. 231

Soiltest, Inc. 232

Steel Tank Institute 233

Syscorp, Inc. 234

Tank Automation, Inc. 235

Tanknology - NDE 236

TeleData, Inc. 246

Tidel Engineering, Inc. 247

Tokheim Corp. 260

Tracer Research Corp. 261

Triangle Environmental, Inc. 264

Universal Sensors and Devices, Inc. 268

USTest, Inc. 273

USTMAN Industries, Inc. 278

Vaporless Manufacturing 282

Veeder-Root 290

Vista Research, Inc. 324

Warren Rogers Associates, Inc. 344

Warrick Controls, Inc. 346

Watson Systems, Inc. (formerly EnviroQuest Technologies Limited) 349
v

Western Environmental Resources 350

TABLE OF CONTENTS

PART II - LEAK DETECTION EQUIPMENT SPECIFICATIONS 

(Continued)

Xerxes Corp. 353
vi

TABLE OF CONTENTS

 

PART III - LEAK DETECTION EQUIPMENT THIRD PARTY EVALUATION UNDER REVIEW 354

(Alphabetical by vendor, then by test method, next by equipment model.)

PART IV - ACCEPTABLE TEST PROTOCOLS 356

(Alphabetical by test method, then by protocol date.)

PART V - LEAK DETECTION EQUIPMENT MAINTENANCE CHECKLIST 360

APPENDIX - GLOSSARY OF TERMS 366
1

PART I

LEAK DETECTION TEST METHODS

AND EQUIPMENT

ALPHABETICAL BY TEST METHOD,

THEN BY VENDOR,

NEXT BY EQUIPMENT MODEL,

FINALLY BY LEAK RATE OR OPERATING PRINCIPLE
2

AUTOMATIC ELECTRONIC LINE LEAK DETECTOR

VENDOR EQUIPMENT NAME

LEAK RATE/THRESHOLD/

MAX PIPELINE CAPACITY

Campo/Miller, Inc. LS300, LS300 N/C 3 gph/2.36 gph/35.36 gallons

LS300-120, LS300-120 XLC 3 gph/2.36 gph/35.36 gallons

LS300-120 PLUS, LS300-120 PLUS A/S 3 gph/2.36 gph/35.36 gallons

LS300-120 PLUS, AL; LS300-120 PLUS, AL, A/S; LS300-120 PLUS 

AL, LSI

3 gph/1.5 gph/163 gallons

LS300-120 PLUS, AL; LS300-120 PLUS, AL, A/S; LS300-120 PLUS 

AL,LSI

0.2 gph/0.1 gph/163 gallons

LS300-120 PLUS, AL; LS300-120 PLUS, AL, A/S; LS300-120 PLUS 

AL,LSI

0.1 gph/0.05 gph/163 gallons

Control Engineers Line Leak Detector, Model LLP2 3.0 gph/1.88 gph/89 gallons

Line Leak Detector, Model LLP2 0.1 gph/0.05 gph/89 gallons

Emco Electronics, Tuthill 

Corp.

EECO System LLD (Q0011) 3.0 gph/2.0 gph/67.4 gallons

EECO System LLD (Q0011) 0.2 gph/0.1293 gph/67.4 gallons

EECO System LLD (Q0011) 0.1 gph/0.0793 gph/67.4 gallons

EECO System LLD (for Flexible Pipelines) 3.0 gph/2.0 gph/49.6 gallons

EECO System LLD (for Flexible Pipelines) 0.1 gph/0.0793 gph/49.6 gallons

Gilbarco Environmental 

Products

Environmental Management Console (EMC)

with Line Leak Detector, Series PA02630000501

3.0 gph/1.5 gph/158 gallons

Environmental Management Console (EMC)

with Line Leak Detector, Series PA02630000501

0.2 gph/0.1 gph/158 gallons

Environmental Management Console (EMC)

with Line Leak Detector, Series PA02630000501

0.1 gph/0.079 gph/158 gallons

Environmental Management Console (EMC)

with Line Leak Detector, Series PA02630000501

(for Flexible Pipelines)

3.0 gph/1.5 gph/49.6 gallons

Environmental Management Console (EMC)

with Line Leak Detector, Series PA02630000501

(for Flexible Pipelines)

0.2 gph/0.1 gph/49.6 gallons

Environmental Management Console (EMC)

with Line Leak Detector, Series PA02630000501

(for Flexible Pipelines)

0.1 gph/0.079 gph/49.6 gallons

Environmental Management Console (EMC)

with Line Leak Detector, Series PA0263000060X

3.0 gph/1.88 gph/98.4 gallons

Environmental Management Console (EMC)

with Line Leak Detector, Series PA0263000060X

0.2 gph/0.17 gph/98.4 gallons

Environmental Management Console (EMC)

with Line Leak Detector, Series PA0263000060X

0.1 gph/0.05 gph/98.4 gallons

Environmental Management Console (EMC)

with Line Leak Detector, Series PA0263000060X

(for Flexible Pipelines)

3.0 gph/1.5 gph/40.8 gallons

Environmental Management Console (EMC)

with Line Leak Detector, Series PA0263000060X

(for Flexible Pipelines)

0.2 gph/0.17 gph/40.8 gallons

Environmental Management Console (EMC)

with Line Leak Detector, Series PA0263000060X

(for Flexible Pipelines)

0.1 gph/0.05 gph/40.8 gallons

Environmental Management Console (EMC)

with Line Leak Detector, Series PA0263000100X, PA0277000060X

3.0 gph/2.5 gph/100 gallons

Environmental Management Console (EMC)

with Line Leak Detector, Series PA0263000100X, PA0277000060X

0.2 gph/0.17 gph/100 gallons

Environmental Management Console (EMC)

with Line Leak Detector, Series PA0263000100X, PA0277000060X

0.1 gph/0.09 gph/100 gallons

Hasstech LineTite Pipeline Leak Monitor 3.0 gph/2.0 gph/341 gallons

LineTite Pipeline Leak Monitor 0.1 gph/0.062 gph/341 gallons

LineTite Pipeline Leak Monitor (for Flexible Pipelines) 3.0 gph/2.0 gph/49.6 gallons

LineTite Pipeline Leak Monitor (for Flexible Pipelines) 0.1 gph/0.062 gph/49.6 gallons

LineTight Pipeline Leak Monitor Model 2001J 3.0 gph/2.5 gph/172 gallons

LineTight Pipeline Leak Monitor Model 2001J 0.1 gph/0.05 gph/172 gallons
3

LineTight Pipeline Leak Monitor Model 2001J

(for Flexible Pipelines)

3.0 gph/2.5 gph/39.5 gallons

LineTight Pipeline Leak Monitor Model 2001J

(for Flexible Pipelines)

0.1 gph/0.05 gph/39.5 gallons
4

AUTOMATIC ELECTRONIC LINE LEAK DETECTOR (CONTINUED)

VENDOR EQUIPMENT NAME

LEAK RATE/THRESHOLD/

MAX PIPELINE CAPACITY

INCON Intelligent Controls, 

Inc.

TS-LLD Line Leak Detector 3 gph/1.5 gph/163 gallons

TS-LLD Line Leak Detector 0.2 gph/0.1 gph/163 gallons

TS-LLD Line Leak Detector 0.1 gph/0.05 gph/163 gallons

TS-LLD Line Leak Detector (for Flexible Pipelines) 3 gph/1.5 gph/49.6 gallons

TS-LLD Line Leak Detector (for Flexible Pipelines) 0.2 gph/0.1 gph/49.6 gallons

TS-LLD Line Leak Detector (for Flexible Pipelines) 0.1 gph/0.05 gph/49.6 gallons

Marley Pump Co. Red Jacket PPM 4000, RLM 9000 3.0 gph/2.0 gph/55.1 gallons

Red Jacket PPM 4000, RLM 9000 0.2 gph/0.1 gph/55.1 gallons

Red Jacket PPM 4000, RLM 9000 0.1 gph/0.047 gph/55.1 gallons

Red Jacket PPM 4000, RLM 9000, ST 1401L, ST1801L (for 

Flexible Pipelines)

0.2 gph/0.1 gph/27.6 gallons

Red Jacket PPM 4000, RLM 9000, ST 1401L, ST1801L (for 

Flexible Pipelines)

0.1 gph/0.05 gph/27.6 gallons

Red Jacket ST 1401L, ST1801L, CPT, Pro-Link 3.0 gph/1.5 gph/172 gallon

Red Jacket ST 1401L, ST1801L, CPT, Pro-Link 0.2 gph/0.1 gph/163 gallons

Red Jacket ST 1401L, ST1801L, CPT, Pro-Link 0.1 gph/0.047 gph/163 gallons

Ronan Engineering Co. Ronan X-76 Automatic Line Leak Detector 

Version X-76 DM-4 Microprocessor and JT-H2 Line Pressure 

Sensor

3.0 gph/0.831 gph/45 gallons

Ronan X-76 Automatic Line Leak Detector

Version X-76 DM-4 Microprocessor and JT-H2 Line Pressure 

Sensor

0.1 gph/0.066 gph/45 gallons

Tidel Engineering, Inc. LIPSPC-301-0730-001, LIP-301-0729-001

Line Integrity Probe and Submersible Pump Controller 

3.0 gph/2.0 gph/129 gallons

LIPSPC-301-0730-001, LIP-301-0729-001

Line Integrity Probe and Submersible Pump Controller 

0.1 gph/0.06 gph/129 gallons

Vaporless Manufacturing Vaporless LD-2100 or PLC-5000 with 98LD-2000PLC

(for Rigid and Flexible Pipelines)

3.0 gph/2.5 gph/172 gallons (Rigid), 

39.5 gallons (Flexible)

Vaporless LD-2100 or PLC-5000 with 98LD-2000PLC

(for Rigid and Flexible Pipelines)

0.2 gph/0.136 gph/172 gallons 

(Rigid), 39.5 gallons (Flexible)

Vaporless LD-2100 or PLC-5000 with 98LD-2000PLC

(for Rigid and Flexible Pipelines)

0.1 gph/0.068 gph/172 gallons 

(Rigid), 39.5 gallons (Flexible)

Veeder-Root TLS-350, 350PC, 350R, 350RPC Line Leak Detector, Series 8475 3.0 gph/1.5 gph/158 gallons

TLS-350, 350PC, 350R, 350RPC Line Leak Detector, Series 8475 0.2 gph/0.1 gph/158 gallons

TLS-350, 350PC, 350R, 350RPC Line Leak Detector, Series 8475 0.1 gph/0.079 gph/158 gallons

TLS-350, 350PC, 350R, 350RPC Line Leak Detector, Series 8475 

(for Flexible Pipelines)

3.0 gph/1.5 gph/49.6 gallons

TLS-350, 350PC, 350R, 350RPC Line Leak Detector, Series 8475 

(for Flexible Pipelines)

0.2 gph/0.1 gph/49.6 gallons

TLS-350, 350PC, 350R, 350RPC Line Leak Detector, Series 8475 

(for Flexible Pipelines)

0.1 gph/0.079 gph/49.6 gallons

TLS 350, 350PC, 350R, 350RPC Line Leak Detector, Series 8484 3.0 gph/1.88 gph/98.4 gallons

TLS 350, 350PC, 350R, 350RPC Line Leak Detector, Series 8484 0.2 gph/0.17 gph/98.4 gallons

TLS 350, 350PC, 350R, 350RPC Line Leak Detector, Series 8484 0.1 gph/0.05 gph/98.4 gallons

TLS 350, 350PC, 350R, 350RPC, LLD-300 Line Leak Detector, 

Series 8484 (for Flexible Pipelines)

3.0 gph/1.5 gph/40.8 gallons

TLS 350, 350PC, 350R, 350RPC Line Leak Detector, Series 8484

(for Flexible Pipelines)

0.2 gph/0.17 gph/40.8 gallons

TLS 350, 350PC, 350R, 350RPC Line Leak Detector, Series 8484

 (for Flexible Pipelines)

0.1 gph/0.05 gph/40.8 gallons

TLS 350, 350PC, 350R, 350RPC, LLD-300 Line Leak Detector, 

Series 8494, Pressurized Line Leak Detector, Series 8494

3.0 gph/2.5 gph/100 gallons

TLS 350, 350PC, 350R, 350RPC, LLD-300 Line Leak Detector, 

Series 8494, Pressurized Line Leak Detector, Series 8494

0.2 gph/0.17 gph/100 gallons

TLS 350, 350PC, 350R, 350RPC, LLD-300 Line Leak Detector, 

Series 8494, Pressurized Line Leak Detector, Series 8494

0.1 gph/0.09 gph/100 gallons
5

AUTOMATIC MECHANICAL LINE LEAK DETECTOR

VENDOR EQUIPMENT NAME

LEAK RATE/THRESHOLD/

MAX PIPELINE CAPACITY

FE Petro, Inc. STP-MLD Pipeline Leak Detector 3.0 gph/2.0 gph/129.14 gallons

STP-MLD-D Pipeline Leak Detector 3.0 gph/2.0 gph/341 gallons

STP-MLD-E Line (Flexline) Leak Detector (for Flexible Pipelines) 3.0 gph/2.0 gph/49.6 gallons

Marley Pump Co. Red Jacket DLD, XLD 3.0 gph/2.0 gph/129 gallons

Red Jacket FX1,FX2,FX1V,FX2V 3.0 gph/2.0 gph/316 gallons 

(FX1,FX1V), 362 gallons (FX2,FX2V)

Red Jacket FX1,FX2,FX1V,FX2V Flexline (for Flexible Pipelines) 3.0 gph/2.0 gph/49 gallons

Red Jacket FX1D,FX2D,FX2DV Installed in the Big-Flow 3.0 gph/2.0 gph/362 gallons

Red Jacket XLP 3.0 gph/2.0 gph/129 gallons

Red Jacket XLP (for Flexible Pipelines) 3.0 gph/2.0 gph/48.9 gallons

Tokheim Corp. Tokheim Pressure Monitor, Models PM 101, 585A-PM 3.0 gph/2.25 gph/78 gallons

Vaporless Manufacturing Vaporless LD-2000, LD-2000S 3.0 gph/1.7 gph/129 gallons

Vaporless LD-2000E, LD-2000E-S (for Flexible Pipelines) 3.0 gph/2.0 gph/59.6 gallons

Vaporless LD-2000T, LD-2000T-S 3.0 gph/2.5 gph/129 gallons

Vaporless 98LD-2000, 99LD-2000, 99LD-2200, LD-2200 Scout

(for Rigid and Flexible Pipelines)

3.0 gph/2.5 gph/172 gallons (Rigid), 

39.5 gallons (Flexible)

Vaporless LD-3000, LD-3000S 3.0 gph/2.0 gph/320 gallons

AUTOMATIC TANK GAUGING METHOD

VENDOR EQUIPMENT NAME

LEAK RATE/THRESHOLD/

MAX TANK CAPACITY

Alert Technologies, Inc. Alert Model 2000 In-Tank Mass Measurement Probe System

(Mass Buoyancy Probe)

0.2 gph/0.1 gph/15,000 gallons

Andover Controls Corp. Andover Infinity, Versions CX9400, CX9200, CX9000,CMX240

(Magnetostrictive Probe)

0.2 gph/0.1 gph/30,000 gallons

Andover Infinity, Versions CX9000, CX9200, CMX240

(Magnetostrictive Probe)

0.2 gph/0.1 gph/15,000 gallons

Andover Infinity, Versions CX9000, CX9200, CMX240

(Magnetostrictive Probe)

0.1 gph/0.05 gph/15,000 gallons

Versions AC8+, AC256+ (Magnetostrictive Probe) 0.2 gph/0.1 gph/15,000 gallons

Caldwell Systems Corp. Tank Manager (Ultrasonic Probe) 0.2 gph/0.1 gph/20,000 gallons

Tank Manager (Ultrasonic Probe) 0.1 gph/0.05 gph/20,000 gallons

Control Engineers CEI 3000 Tank Level Module - Version TLP2, Normal/Rapid Test 

Mode (Magnetostrictive Probe)

0.2 gph/0.1 gph/15,000 gallons

CEI 3000 Tank Level Module - Version TLP2, Normal/Rapid Test 

Mode (Magnetostrictive Probe)

0.1 gph/0.05 gph/15,000 gallons

EBW, INC. Auto-Stik II, Auto-Stik Jr. (Magnetostrictive Probe) 0.2 gph/0.1 gph/15,000 gallons

Auto-Stik II, Auto-Stik Jr. (Magnetostrictive Probe) 0.1 gph/0.05 gph/15,000 gallons

Egemin Naamloze

Vennootschap

E'SPI III (Mass Buoyancy Probe) 0.2 gph/0.075 gph/15,000 gallons

E'SPI IV (Mass Buoyancy Probe) 0.2 gph/0.1 gph/15,000 gallons

Emco Electronics, Tuthill 

Corp.

EECO System TLM/0.2 gph Precision Test

(Q0400-4xx Magnetostrictive Probe)

0.2 gph/0.1 gph/15,000 gallons

EECO System TLM/0.1 gph Precision Test 

(Q0400-4xx Magnetostrictive Probe)

0.1 gph/0.05 gph/15,000 gallons

EECO System TLM/0.2 gph Quick Test

(Q0400-4xx Magnetostrictive Probe)

0.2 gph/0.1 gph/15,000 gallons

EECO System TLM/0.1 gph Quick Test

(Q0400-4xx Magnetostrictive Probe)

0.1 gph/0.05 gph/15,000 gallons

Engineered Systems, Inc. Image II (Magnetostrictive Probe) 0.2 gph/0.1 gph/15,000 gallons

Environment and Safety EASI Level-Tru (Magnetostrictive Probe) 0.2 gph/0.1 gph/15,000 gallons

Gasboy International 

(formerly William M. 

Wilson's Sons)

Gasboy TMS 500 (Magnetostrictive Probe) 0.2 gph/0.1 gph/15,000 gallons

Gilbarco Environmental 

Products

EMC Environmental Management Console, EMC Basic Monitoring 

System Tank Monitors 2, 3, 2.1, 3.1,

PAO238000XXXX (Capacitance Probe)

0.2 gph/0.1 gph/15,000 gallons

EMC Environmental Management Console

EMC Basic Monitoring System Tank Monitors 2.1,3.1, 

PAO264XXX0000 (Capacitance Probe)

0.2 gph/0.126 gph/15,000 gallons
6

EMC Environmental Management Console

EMC Basic Monitoring System Tank Monitors 2.1, 3.1, 

PAO264XXX0000 (Capacitance Probe)

0.1 gph/0.071 gph/15,000 gallons
7

AUTOMATIC TANK GAUGING METHOD (CONTINUED)

VENDOR EQUIPMENT NAME

LEAK RATE/THRESHOLD/

MAX TANK CAPACITY

Gilbarco Environmental 

Products

EMC Environmental Management Console

EMC Basic Monitoring System Tank Monitors 2.1, 3.1, 

PAO265XXX0000 (Magnetostrictive Probe)

0.2 gph/0.093 gph/15,000 gallons

EMC Environmental Management Console

EMC Basic Monitoring System Tank Monitors 2.1, 3.1, 

PAO265XXX0000 (Magnetostrictive Probe)

0.1 gph/0.071 gph/15,000 gallons

EMC/PC Series Monitoring Systems

PA0265 and PA0300

(Magnetostrictive Probe)

0.2 gph/0.126 gph/20,000 gallons

Hasstech Tank Compliance Center, Model 700

(7100 Series Magnetostrictive Probe)

0.2 gph/0.1 gph/15,000 gallons

Tank Compliance Center, Model 700

(7100 Series Magnetostrictive Probe)

0.1 gph/0.05 gph/15,000 gallons

INCON Intelligent Controls, 

Inc.

TS 1000, 1001, 2001 (Magnetostrictive Probe) 0.2 gph/0.1 gph/15,000 gallons

TS 1000, 1001, 2001 (Magnetostrictive Probe) 0.1 gph/0.05 gph/15,000 gallons

TS 1000, 1001, 2001 (Incon LL2 Magnetostrictive Probe) 0.2 gph/0.1 gph/30,000 gallons

TS 2000 (Magnetostrictive Probe) 0.2 gph/0.058 gph/15,000 gallons

Keekor Environmental 

Products

TankTite Leak Detection Kernel Version 1.0 with Keeprobe K7

(Magnetostrictive Probe)

0.2 gph/0.1 gph/15,000 gallons

Marley Pump Co. Prolink System, RJE Probes # RE-400-094 thru 112-5

(Magnetostrictive Probe)

0.2 gph/-0.116 gph leak, 0.084 gph 

gain/18,000 galllons

Prolink System, RJE Probes # RE-400-094 thru 112-5

(Magnetostrictive Probe)

0.1 gph/-0.065 gph leak, 0.035 gph 

gain/18,000 gallons

Red Jacket ATM System, Version RLM 5000, 5001, 9000

(Magnetostrictive Probe)

0.2 gph/0.1 gph/15,000 gallons

Sonic Technology (ST) 1400-1800 Series Tank Monitoring System,

ATG Automatic Tank Gauging Monitor, LLM Series Liquid Level 

Monitor, FMS Fuel Management Monitor (Ultrasonic Probe)

0.2 gph/0.1 gph/18,000 gallons

Sonic Technology (ST) 1400-1800 Series Tank Monitoring System,

ATG Automatic Tank Gauging Monitor, LLM Series Liquid Level 

Monitor, FMS Fuel Management Monitor (Ultrasonic Probe)

0.1 gph/0.05 gph/18,000 gallons

NESCO (formerly Arizona 

Instrument Corp.)

Encompass MTS IPAM #17-903 (Magnetostrictive Probe #17-9300) 0.2 gph/0.1 gph/15,000 gallons

Encompass USF IPAM #17-901 (Ultrasonic Probe #17-9100) 0.2 gph/0.1 gph/15,000 gallons

Omntec/Electro Levels 

Mfg., Inc.

OEL 8000 (Magnetostrictive Probe) 0.2 gph/0.1 gph/15,000 gallons

OEL 8000 (Magnetostrictive Probe) 0.1 gph/0.05 gph/15,000 gallons

Patriot Sensors and 

Controls Corp. (formerly 

MagneTek)

7021 Digital Tank Gauge (7030 Series Magnetostrictive Probe) 0.2 gph/0.1 gph/15,000 gallons

7021 Digital Tank Gauge (7030 Series Magnetostrictive Probe) 0.1 gph/0.05 gph/15,000 gallons

7021 Digital Tank Gauge (7100 Series Magnetostrictive Probe) 0.2 gph/0.1 gph/15,000 gallons

7021 Digital Tank Gauge (7100 Series Magnetostrictive Probe) 0.1 gph/0.05 gph/15,000 gallons

Petro Vend, Inc. Petrosonic III

(Version 4.05 Model 613, 4 inch, Magnetostrictive Probe)

0.2 gph/0.1 gph/15,000 gallons

Site Sentinel Model II and III

 (Model 613, 2 inch, Magnetostrictive Probe)

0.2 gph/0.1 gph/15,000 gallons

Site Sentinel Model II and III,

(Model 613, 4 inch, Magnetostrictive Probe)

0.2 gph/0.1 gph/15,000 gallons

Site Sentinel Model II and III,

(Model 613, 4 inch, Magnetostrictive Probe)

0.1 gph/0.06 gph/15,000 gallons

Pneumercator Company, 

Inc.

TMS 2000, TMS 3000 (Magnetostricitive Probe) 0.2 gph/0.1 gph/20,000 gallons

TMS 2000, TMS 3000 (Magnetostricitive Probe) 0.1 gph/0.05 gph/20,000 gallons

Ronan Engineering Co. X-76 ETM, X-76 ETM-4X (Magnetostrictive Probe) 0.2 gph/0.1 gph/15,000 gallons

X-76 ETM, X-76 ETM-4X (Magnetostrictive Probe) 0.1 gph/0.05 gph/15,000 gallons
8

AUTOMATIC TANK GAUGING METHOD (CONTINUED)

VENDOR EQUIPMENT NAME

LEAK RATE/THRESHOLD/

MAX TANK CAPACITY

Tidel Engineering, Inc. Tidel Environmental Monitoring System, 3500 Series

(Ultrasonic Probes #401-0009, #401-0010 and #401-0023)

0.2 gph/0.1 gph/15,000 gallons

Tidel Environmental Monitoring System, EMS 2000, 3000, 3500 

Series (Ultrasonic Probes #401-0009 and #401-0010)

0.2 gph/0.1 gph/15,000 gallons

Tidel Environmental Monitoring System, EMS 2000, 3000, 3500 

Series (Ultrasonic Probes #401-0021 and #401-0022)

0.2 gph/0.1 gph/15,000 gallons

Tidel Environmental Monitoring System, EMS 4000

(Ultrasonic Probe #312-9000)

0.2 gph/0.1 gph/15,000 gallons

Tidel Environmental Monitoring System, EMS 4000

(Ultrasonic Probe #312-9000)

0.1 gph/0.05 gph/15,000 gallons

Tidel Environmental Monitoring System, EMS 4000

(Ultrasonic Probe #312-9001)

0.2 gph/0.1 gph/15,000 gallons

Tidel Environmental Monitoring System, EMS 4000

(Ultrasonic Probe #312-9001)

0.1 gph/0.05 gph/15,000 gallons

Universal Sensors and 

Devices, Inc.

TICS-1000 (Magnetostrictive Probe) 0.2 gph/0.1 gph/15,000 gallons

USTest, Inc. UST 2001 Quick Test (Ultrasonic Probe) 0.2 gph/0.1 gph/15,000 gallons

UST 2001(Ultrasonic Probe) 0.1 gph/0.05 gph/15,000 gallons

Veeder-Root TLS-200, 200i, 250i, 300, 300C, 300i, 350, 350PC, 350R, 350RPC 

UST ATGS

(Model 7842 Digital Sensing Capacitance Probe)

0.2 gph/0.1 gph/15,000 gallons

TLS-200, 200i, 250i, 300, 300C, 300i, 300PC, 350, 350PC, 350R, 

350RPC UST ATGS

(Model 8472 Digital Sensing Capacitance Probe)

0.2 gph/0.126 gph/15,000 gallons

TLS-200, 200i, 250i, 300, 300C, 300i, 300PC, 350, 350PC, 350R, 

350RPC UST ATGS

(Model 8472 Digital Sensing Capacitance Probe)

0.1 gph/0.071 gph/15,000 gallons

TLS-200, 200i, 250, 250i, 300, 300C, 300i, 300PC, 350, 350PC, 

350R, 350RPC UST ATGS 

(Model 8473 Digital Sensing Magnetostrictive Probe)

0.2 gph/0.093 gph/15,000 gallons

TLS-200, 200i, 250, 250i, 300, 300C, 300i, 300PC, 350, 350PC, 

350R, 350RPC UST ATGS 

(Model 8473 Digital Sensing Magnetostrictive Probe)

0.1 gph/0.071 gph/15,000 gallons

TLS-250, 250i, 300, 300C, 300i, 300PC, 350, 350PC, 350R, 350RPC 

UST ATGS

(Models 8473, 8493 Magnetostrictive Probes)

0.2 gph/0.126 gph/15,000 gallons

TLS-250, 250i, 300, 300C, 300i, 300PC, 350, 350PC, 350R, 350RPC 

UST ATGS

(Models 8473, 8493 Magnetostrictive Probes)

0.1 gph/0.071 gph/15,000 gallons

TLS Series 300, 350, 350R 

(Models 8463, 8473, 8493 Magnetostrictive Probes)

0.2 gph/0.126 gph/20,000 gallons

TLS Series 300, 350, 350R 

(Models 8463, 8473, 8493 Magnetostrictive Probes)

0.1 gph/0.071 gph/20,000 gallons

TLS Series 300, 350, 350R 

(Models 8463, 8473, 8493 Magnetostrictive Probes)

0.2 gph/0.126 gph/30,000 gallons
9

BULK FIELD-CONSTRUCTED TANK LEAK DETECTION METHOD

VENDOR EQUIPMENT NAME

LEAK RATE/THRESHOLD/

MAX PRODUCT SURFACE AREA

ASTTest Services Inc. ASTTest Mass Balance Leak Detection System [(product surface area in ft2 ÷ 5,575 

ft2) x 0.88 gph]/[(product surface 

area in ft2 ÷ 5,575 ft2) x 0.44 

gph]/13,938 ft2

Coggins Systems, Inc. Leak Manager with Barton Series 3500 ATG (48 hour test) [(product surface area in ft2 ÷ 6,082 

ft2) x 2.0 gph]/[(product surface 

area in ft2 ÷ 6,082 ft2) x 1.0 

gph]/15,205 ft2

Leak Manager with Barton Series 3500 ATG (72 hour test) [(product surface area in ft2 ÷ 6,082 

ft2) x 2.0 gph]/[(product surface 

area in ft2 ÷ 6,082 ft2) x 1.0 

gph]/15,205 ft2

Mass Technology Corp. Precision Mass Measurement System (24 hour test) [(product surface area in ft2 ÷ 1,257 

ft2) x 0.1 gph]/[(product surface 

area in ft2 ÷ 1,257 ft2) x 0.05 

gph]/3,143 ft2

Precision Mass Measurement System (48 hour test) [(product surface area in ft2 ÷ 6,082 

ft2) x 0.294 gph]/[(product surface 

area in ft2 ÷ 6,082 ft2) x 0.147 

gph]/6,082 ft2

Precision Mass Measurement System (72 hour test) [(product surface area in ft2 ÷ 

14,200 ft2) x 0.638 gph]/[(product 

surface area in ft2 ÷ 14,200 ft2) x 

0.319 gph]/35,500 ft2

Universal Sensors and 

Devices, Inc.

LTC-1000

(Mass Buoyancy Probe)

[(product surface area in ft2 ÷ 

14,244 ft2) x 1.4 gph]/[(product 

surface area in ft2 ÷ 14,244 ft2) x 0.7 

gph]/35,610 ft2

LTC-2000

(Differential Pressure Probe)

[(product surface area in ft2 ÷ 

14,244 ft2) x 3.0 gph]/[(product 

surface area in ft2 ÷ 14,244 ft2) x 1.5 

gph]/35,610 ft2

Vista Research, Inc. and 

Naval Facilities Engineering 

Service Center

LRDP-24 (V1.0.2, V1.0.3) [(product surface area in ft2 ÷ 6,082 

ft2) x 2.0 or 3.0 gph]/[(product 

surface area in ft2 ÷ 6,082 ft2) x (2.0 

or 3.0 gph - 0.223 gph)]/15,205 ft2

LRDP-48 (V1.0.2, V1.0.3) [(product surface area in ft2 ÷ 6,082 

ft2) x 2.0 or 3.0 gph]/[(product 

surface area in ft2 ÷ 6,082 ft2) x (2.0 

or 3.0 gph - 0.188 gph)]/15,205 ft2 

LRDP-24 (V1.1) [(product surface area in ft2 ÷ 6,082 

ft2) x 0.856 gph]/[(product surface 

area in ft2 ÷ 6,082 ft2) x 0.632 

gph]/15,205 ft2

LRDP-48 (V1.1) [(product surface area in ft2 ÷ 6,082 

ft2) x 0.749 gph]/[(product surface 

area in ft2 ÷ 6,082 ft2) x 0.563 

gph]/15,205 ft2

CONTINUOUS IN-TANK LEAK DETECTION METHOD

VENDOR EQUIPMENT NAME

LEAK RATE/THRESHOLD/

MAX TANK CAPACITY

Gilbarco Environmental 

Products

EMC Series with CSLD, PAO265XXXX100, PA0300XXXX100

(Magnetostrictive Probe)

0.2 gph/0.16 gph/38,170 gallons

Veeder-Root TLS Series 300, 400 Monitoring Systems with CSLD

(Models 8473, 8493 Magnetostrictive Probes)

0.2 gph/0.16 gph/38,170 gallons
10

DOUBLE WALLED TANK TIGHTNESS TEST METHOD

VENDOR EQUIPMENT NAME

LEAK RATE/THRESHOLD/

MAX TANK CAPACITY

Containment Solutions Inc.

(formerly Fluid 

Containment which was 

formerly O/C Tanks)

Hydrostatic Pr ecision Tank Test for DWT-Type II Tanks 0.1 gph/0.05 gph without dispensing, 

0.07 gph with dispensing/30,000 

gallons

Xerxes Corp. Xerxes Trucheck Hydrostatic Monitoring System 0.1 gph/0.05 gph/30,000 gallons

LARGE DIAMETER PIPELINE LEAK DETECTOR

VENDOR EQUIPMENT NAME

LEAK RATE/THRESHOLD/

MAX PIPELINE CAPACITY

Caldon, Inc. Caldon PF2000 Pipeline Leak Detection System for Bulk Pipelines 10 gph/8 gph/212,000 gallons

EFA Technologies, Inc. LeakNet 3.0 gph/2.2 gph/116,230 gallons

Vista Research, Inc. Model HT-100 Monitoring or Line Tightness Test

Version 1.0

0.004% of line capacity in 

gph/0.00282% of line volume in gph/ 

612,954 gallons

Model HT-100 Monitoring or Line Tightness Test

Version 1.1

0.00209% of line capacity in 

gph/0.000916% of line volume in

gph/ 612,954 gallons

Model HT-100-n Monitoring or Line Tightness Test

Version 1.0

0.004% ÷  ̄(n) of line capacity in 

gph/0.00282% ÷  ̄(n) of line volume 

in gph; where n is the # of tests 

averaged together./ 612,954 gallons

Model HT-100-n Monitoring or Line Tightness Test

Version 1.1

0.00209% ÷  ̄(n) of line capacity in 

gph/0.000916% ÷  ̄(n) of line 

volume in gph; where n is the # of 

tests averaged together./ 612,954 

gallons

Model LT-100 Manual Method, Version 1.0 0.2 gph/0.177 gph/3,400 gallons

Model LT-100 Manual Method, Version 1.0 0.1 gph/0.077 gph/3,400 gallons

Model LT-100 Primary Method, Version 1.0 0.2 gph/0.148 gph/3,400 gallons

Model LT-100 Primary Method, Version 1.0 0.1 gph/0.060 gph/3,400 gallons

Model LT-100 Segmented Method, Version 1.0 0.2 gph/0.174 gph/3,400 gallons

Model LT-100 Segmented Method, Version 1.0 0.1 gph/0.074 gph/3,400 gallons

Model LT-100a Monthly Monitoring Method

Version 1.0

0.2 gph at 50 psi/0.148 gph/3,400 

gallons

Model LT-100a Line Tightness Method

Version 1.0

0.1 gph at 50 psi/0.060 gph/3,400 

gallons

Model LT-100a Monthly Monitoring Method

Version 1.0 Segmented Method

0.2 gph at 50 psi/0.174 gph/3,400 

gallons

Model LT-100a Line Tightness Method

Version 1.0 Segmented Method

0.1 gph at 50 psi/0.074 gph/3,400 

gallons

Model LT-100a Hourly Monitoring Test

Version 2.0 Segmented Method

3.0 gph/2.936 gph/3,400 gallons

Model LT-100a Monthly Monitoring Test

Version 2.0 Segmented Method

0.2 gph/0.136 gph/3,400 gallons

LINE TIGHTNESS TEST METHOD

VENDOR EQUIPMENT NAME

LEAK RATE/THRESHOLD/

MAX PIPELINE CAPACITY

Hasstech AcuRite 0.1 gph/0.01 gph/75 gallons

Heath Consultants, Inc. Petro Tite Line Tester 0.1 gph/0.01 gph/129 gallons

Horner EZY-Chek EZY-Chek Manual Line Leak Detector 0.1 gph/0.05 gph/129 gallons

EZY-Chek II Automatic Line Leak Detector 0.1 gph/0.05 gph/129 gallons

ProTank, Inc. LTH-5000 Line Tester 0.1 gph/0.05 gph/40 gallons

LTP-5000 Line Tester 0.1 gph/0.05 gph/41 gallons

Tanknology - NDE Proline Test Series III, Version 1.0 0.1 gph/0.05 gph/41 gallons

PTK-88 0.1 gph/0.05 gph/40 gallons
11

TLD-1 0.1 gph/0.05 gph/50 gallons

Tracer Research Corp. Tracer Tight Line Test 0.1 gph/A pipeline system should not 

be declared tight when tracer 

chemical is detected outside of the 

pipeline./No volume limitation.

Triangle Environmental, 

Inc.

TEI Model LT-3, Version 1.0 0.1 gph/0.05 gph/80 gallons

Western Environmental 

Resources

Model PLT-100R 0.1 gph/0.05 gph/80 gallons

LIQUID-PHASE INTERSTITIAL DETECTOR

VENDOR EQUIPMENT NAME OPERATING PRINCIPLE

Beaudreau Electronics, 

Inc.

Models 404, 406 Pump Cut-Offs float switch (Model 404)

refractive index of liquids 

(Model 406)

Beaudreau Electronics, 

Inc.

Models 510, 516 Discriminating Sensors polymer strip, hyrocarbon-only 

(Model 510)

optical sensor and conductivity 

(Model 516)

Caldwell Systems Corp. Tank Manager Liquid Sensor, Version TMLIQ ultrasonic

Containment Solutions, Inc. 

(formerly Fluid 

Containment which was 

formerly O/C Tanks)

FCI Liquid Filled Interstitial Monitor

Tank Model DWT6 with Model FHRB 810 Level Sensor

float switch

EBW, Inc. AUTO-STIK Discriminating Sensors, LS-5, LS-35, LS-3A, LS-30A, 

LS-7

float switch (all models), product 

permeability(LS-5, LS-35)

Emco Electronics, Tuthill 

Corp.

EECO System, Leak Sensor II, Leak Sensor Jr.

Thermistor and Proximity probes

thermal conductivity, proximity 

switch

EECO 2000, 3000, Leak Sensor II, Leak Sensor Jr. Systems 

Q0001-005 Interstitial Space Flood Sensor, and

EECO 1500, 2000, 3000 Systems

Q0003-005 Wet Interstitial Sensor

float switch

EECO 1500, 2000, 3000 Systems

Q0003-001 Discriminating Dispenser Pan Sensor,

Q0003-002 Discriminating STP Sump Sensor,

Q0003-003 Discriminating Interstitial Sensor,

Q0003-006 Liquid Only Interstitial Sensor,

Q0003-009 Liquid Float Sensor

not specified

Gilbarco Environmental 

Products

PA02590XXX000, PA02591144000, PA02592000000 float switch

INCON Intelligent Controls, 

Inc.

Tank Sentinel TS-1000EFI,

TSP-DIS BriteSensor, and

Tank Sentinel TS-1000/TS-2000,

TSP-EIS Standard Sensor, TSP-PS Liquid Contact Sensor

opto-electric

Tank Sentinel TS-1000EFI,

TSP-HIS BriteSensor, and

Tank Sentinel TS-1000/TS-2000,

TSP-HLS Standard Sensor, TSP-ULS Standard Sensor

magnetic switch

Marley Pump Co. Red Jacket Electronics RE400-179-5 to RE400-199-5 Combination 

High Level/Low Level Sensor, RE400-042-5 Hydrostatic Sensor, 

Red Jacket PPM 4000 with Optical Liquid Discrimination Sensor

float switch (RE400-179-5 to RE400-

199-5, RE400-042-5)

optical sensor (PPM4000)
12

Red Jacket Electronics RE400-058-5, RE400-059-5, RE400-147-5, 

RE400-148-5 Overfill Sensor, RE400-111-5 Sump Sensor, RE400-

203-5 Optical Liquid Discrimination Sensor, RE400-204-5 Dispenser 

Pan Monitor, RE400-180-5 Liquid Refraction Sensor

float switch (RE400-058-5, RE400-

059-5, RE400-147-5, RE400-148-5, 

RE400-111-5), electrical conductivity 

and optical (RE400-203-5), 

conductive polymer (RE400-204-5), 

optical (RE400-180-5) 

NESCO (formerly Arizona 

Instrument Corp.)

Soil Sentry Liquid 330(17-330-A/17-330-B), TLM-830, 

ENCOMPASS APAM

Probes 17-141A, 17-142A, 17-143A, 17-144A

refraction
13

LIQUID-PHASE INTERSTITIAL DETECTOR (CONTINUED)

VENDOR EQUIPMENT NAME OPERATING PRINCIPLE

Omntec/Electro Levels 

Mfg., Inc.

L-LL-R-1, LS-ASC, PDS-ASC, PDWS-1, PDWF-1 refractive index of liquids (all), 

electrical conductivity (PDS-ASC, 

PDWS-1, PDWF -1) 

PermAlert PAL-AT Models AT20C, AT50C, AT40K, PHL Hydrocarbon Sensor electrical conductivity

TankWatch Models PHM10, PHMS 

Combination Hydrocarbon/Water Probe, Hydrocarbon Probe

electrical conductivity

Petro Vend, Inc. Petrosentry IV, Petrosentry VIII, SiteSentinel

Liquid Sensor, Universal Sump Sensor, Universal Reservoir 

Sensor

thermal conductivity(Liquid Sensor), 

float switch (Universal Sump 

Sensor, Universal Reservoir Sensor)

Pneumercator Company, 

Inc.

LC1000, E-14-29, E-700-1, LDE-700, LDE-740, TMS 3000

LS600AB, LS600LDBN, LS610, RSU800

float switch

LDE 700, LDE 740, LDE 9000

Sensor Probe Models 9-901, 9-902, 9-903

capacitance

Ronan Engineering Co. Ronan Controller Models X76S; X76VS; X76LVC; TRS76; X76ETM, 

LVCS; X76CTM-N4; X76ETM-4X; X76-4X, -3, -6, -9, -12; X76AST4X

Ronan Sensors LS-3 N.C.; LS-3 N.O.; LS-30; LS-7; HVA; LS-3SS; 

LS-1

float switch

Tidel Engineering, Inc. EMS-3500

Liquid Discriminatory Probes Part 301-0635,

Containment Sump Probes Part 301-0642, 

Tidel Detector No. 301-0752-001

electrical conductivity/hydrocarbon 

sensitive polymer (Part 301-0635), 

magnetic switch/float and 

hydrocarbon sensitive polymer (Part 

301-0642),float switch (No. 301-

0752-001)

Universal Sensors and 

Devices, Inc.

Leak Alert System

Models LAL-100, LA-01, LA-02, LA-04, LA-X4, LA-08, DLS-01, 

LS-20, LS-36, LS-70, CATLAS 

Liquid Sensor LALS-1

thermal conductivity

Veeder-Root ILS-250, ILS-350, TLS-250i, 250i Plus, 300, 300C, 300i, 300PC,

TLS-350 Series

Interstitial Liquid Sensor for Steel Tanks (0794390-420, 460)

Interstitial Liquid Sensor for Fiberglass Tanks 

(0794390-401, 404, 407, 409)

Liquid Sensor for Sumps (0794390-206)

float switch

TLS-350 Series

Discriminating Insterstitial Liquid Sensor (794380-341),

Dispenser Pan Sensor (794380-320),

Discriminating Containment Sump Sensor (794380-350, 360),

Discriminating Fibertrench Sensor (794380-360, 361, 362)

capacitance change/ultrasonic 

(794380-341)

electrical conductivity/ultrasonic 

(794380-320, 350, 360, 361, 362)

TLS-350 Series,TLS-300, 300i

Dispenser Pan Sensor (794380-322),

Discriminating Containment Sump Sensor (794380-352)

product permeable, reed switch/float

Dispenser Pan Sensor (847990-001) and Differentiating Dispenser 

Pan Sensor (847990-002) With Dispenser Control Interface

product permeable, reed switch/float

TLS-350 Series, TLS-300, 300i

Dual and Single Stage Hydrostatic Sensors (794380-301, 302)

float switch

TLS-300C, 300i, 300PC, 350, 350PC, 350R, 350RPC

Solid-State Pan/Sump Sensor (794380-321, 351),

Piping Sump Sensor (794380-208, 209), 

Micro Sensor (794380-340)

product permeable,

ultrasonic/float switch

Warrick Controls, Inc. DMS-47X-X-X(-X), DMS-57X-X-X(-X) Monitoring Panels

Models DLP-1-NC, DLP-2-NC, DLP-2-NO Sensors

float switch

Model DFP-25 Sensor product solubility
14

LIQUID-PHASE OUT-OF-TANK PRODUCT DETECTOR

VENDOR EQUIPMENT NAME OPERATING PRINCIPLE

Advanced Tank 

Technology, Inc.

Leak Tracer Dye (LTD) product solubility - color 

development

Agar Corp. LEAKWISE Groundwater Monitor

ID-220 Series Hydrocarbon on Water Detector System

radio frequency (RF) attenuation

Armstrong Monitoring 

Corporation

AMC 5100, Leak Detection Cable AMC-5007 electrical conductivity

Brooks KWK, Inc. Leak Detection Systems,

KW-140, KW-240 Monitors with Types 1, 2 Sensors

product soluble

EBW, Inc. AUTO-STIK Discriminating Sensors, LS-10,LS-15,LS-20 float switch and product permeability

FCI Environmental, Inc. Analog Hydrocarbon Probe AHP-100,

Digital Hydrocarbon Probe DHP 100

fiber optic chemical sensor

Gems Sensors Inc. 

(formerly IMO Industries 

Inc.)

Gems Smartwell Portable Monitor Model WPM-535

with Groundwater Probe Model WP-535

conductive polymer

Gilbarco Environmental 

Products

Environmental Management Console (EMC)

Groundwater Sensor, series PA02700XX0001

electrical conductivity

INCON Intelligent Controls, 

Inc.

Tank Sentinel TS-1000EFI:

TSP-DDS BriteSensor, TSP-DTS BriteSensor,

TSP-MWS BriteSensor Groundwater Probe

magnetic switch and float (TSP-DDS 

BriteSensor, TSP-DTS BriteSensor) 

and hydrocarbon sensitive polymer 

(all)

Mallory Controls Pollulert Probes MD221G/T, MD221G/TRA, MD241R, MD241RRA, 

MD241G, MD241GRA

electrical conductivity

One Plus Corp. Leak Edge, Models 100-3001, 100-4001 product permeable

PermAlert PAL-AT Models AT20C, AT50C, AT40K, AGW Sensor Cable, TFH 

Hydrocarbon Sensor Cable

impedance change

PAL-AT Models AT20C, AT50C, AT40K

with PHFW Hydrocarbon Probe and Type 1 or Type 2 Sensor

product soluble

Petro Vend, Inc. SiteSentinel, 30-3206, -3207, -3210 Sensors product permeable

Raychem Corp. TraceTek Alarm and Locator Modules

TT502, TT5000, TT3000 Fuel Sensing Cable 

electrical conductivity

Tidel Engineering, Inc. EMS-3500

Monitoring Well Probe Part 301-0641,

Sheen Probes Part 301-0687,

Tidel Detector No. 301-0762

conductivity via resistor ladder 

network(Part 301-0641), electrical 

conductivity/hydrocarbon sensitive 

polymer (Part 301-0687 and No. 301-

0762)

Tidel Detector Nos. 301-0324-001, 301-0325-001, 301-0326-001, 

301-0326-002

electrical conductivity

Veeder-Root 350 Series UST Monitoring Systems

Models ILS-350, TLS-350, 350R, 350PC, 350RPC

Groundwater Sensor (794380-621, 622, 624)

electrical conductivity
15

NON-VOLUMETRIC TANK TIGHTNESS TEST METHOD (TRACER)

VENDOR EQUIPMENT NAME LEAK RATE/THRESHOLD

MAX TANK CAPACITY

Tracer Research Corp. Tracer Tight 0.1 gph/ A tank system should not 

be declared tight when tracer 

chemical is detected outside of the 

tank./No volume limitation

NON-VOLUMETRIC TANK TIGHTNESS TEST METHOD (ULLAGE)

VENDOR EQUIPMENT NAME LEAK RATE/THRESHOLD/

MAX ULLAGE CAPACITY

Alert Technologies, Inc. Alert Ullage System Model 1050 

(Pressure and Vacuum Test)

0.1 gph/ A tank system should not be declared tight 

if the ratio of the ultrasonic signal (when the tank is 

under pressure or vacuum) to the background 

signal (prior to pressurization or evacuation) equals 

or exceeds 1.5 for either 12 kHz or 25 kHz 

frequency band./6,000 gallons

Alert Ullage System Model 1050 X 

(Vacuum Test)

0.1 gph/ A tank system should not be declared tight 

if the ratio of the ultrasonic signal (when the tank is 

under vacuum) to the background signal (prior to 

evacuation) equals or exceeds 1.5 for either 12 

kHz or 25 kHz frequency band./24,000 gallons

ProTank, Inc. UTA-5000 Ullage Tester 

(Vacuum or Pressure Test)

0.1 gph/ A tank system should not be declared tight 

when the acoustic signal detected is different from 

the baseline. Baseline is the acoustic signal before 

tank is pressurized or evacuated./16,500 gallons 

max ullage volume

UTF-5000 Ullage Tester

(Pressure Test)

0.1 gph/ A tank system should not be declared tight 

when the make-up gas flow rate into ullage equals 

or exceeds 0.275 cubic feet/hour./7,500 gallons 

max ullage volume

UTFP-5000 Ullage Tester 

(Pressure Test)

0.1 gph/ A tank system should not be declared tight 

when the pressure decay trend equals or exceeds 

± 0.016 psi/hr./10,260 gallons max ullage volume

Tanknology - NDE UST Ullage Test, Version U2 

(Pressure Test)

0.1 gph/ A tank system should not be declared tight 

when the pressure decay trend equals or exceeds 

± 0.016 psi/hr./10,260 gallons max ullage volume

UTS-4T Ullage Test

 (Pressure Test)

0.1 gph/ A tank system should not be declared tight 

when the make-up gas flow rate into ullage equals 

or exceeds 0.275 cubic feet/hour./7,500 gallons 

max ullage volume

U3 Ullage Test 

(Vacuum or Pressure Test)

0.1 gph/ A tank system should not be declared tight 

when the acoustic signal detected is different from 

the baseline. Baseline is the acoustic signal before 

tank is pressurized or evacuated./16,500 gallons 

max ullage volume

Triangle Environmental, 

Inc.

TEI Ullage Test, Version 1.0 

(Vacuum Test)

0.1 gph/ A tank system should not be declared tight 

when an increase in the acoustic noise level 

(above background) of the tank under vacuum is 

detected due to air or water ingress./15,000 gallons

USTest, Inc. UST 2000/U 

(Pressure and Vacuum Test) 

0.1 gph/ A tank system should not be declared tight 

when there is a substantial increase in the acoustic 

noise signal (when the tank is under pressure or 

vacuum) above the background signal (prior to 

pressurization or evacuation) in the frequency 

interval of 10 kHz to 20 kHz./7,550 gallons 

(pressure test), 5,250 gallons (vacuum test). 
16

NON-VOLUMETRIC TANK TIGHTNESS TEST METHOD (VACUUM)

VENDOR EQUIPMENT NAME

LEAK RATE/THRESHOLD/

MAX TANK CAPACITY

Horner EZY CHECK EZY 3 0.1 gph/ A tank system should not 

be declared tight when the vacuum 

decay is more than 1 inch water 

column pressure for non-volatile 

products and 10% of the lower 

determined vapor pressure for 

volatile products. 

A tank system should also not be 

declared tight if any water ingress is 

detected./50,000 gallons

Protank, Inc. Fast Test 

(Underfill Test)

0.1 gph/ A tank system should not 

be declared tight when the acoustic 

signal detected is different from the 

baseline. Baseline is the acoustic 

signal before tank is 

evacuated./30,000 gallons

Tanknology – NDE Quick Test 

(Underfill Test)

0.1 gph/A tank system should not be 

declared tight when the acoustic 

signal detected is different than the 

baseline. Baseline is the acoustic 

signal before the tank is 

evacuated./30,000gallons

VacuTect 0.1 gph/ A tank system should not 

be declared tight when:

sonic emission of air ingress is 

detected in ullage area and/or; sonic 

emission of bubbles formed by air 

ingress is detected in product-filled 

portion of the tank and/or; water 

ingress is detected at the bottom of 

the tank./75,000 gallons

Triangle Environmental, 

Inc.

TEI System 5000, Version 1.0 0.1 gph/ A tank system should not 

be declared tight when the acoustic 

noise level of the tank under vacuum 

is greater than the calibrated 

background acoustic noise level 

(prior to evacuation)./20,000 gallons.

PRESSURE/VACUUM INTERSTITIAL MONITOR

VENDOR EQUIPMENT NAME

LEAK RATE/THRESHOLD/

MAX TANK CAPACITY

Bell Avon, Inc. VIGILANT Leak Detection System 0.1 gph/ System alarms when 

changes in interstitial vacuum 

exceed a predetermined change in 

slope versus time curve./15,000 

gallons

HT Technologies, Inc. Vakumatik Models V 60, V 70 Ex 0.1 gph/ System alarms when liquid 

enters interstitial space and vacuum 

decreases (pressure increases) 

above 34 millibars./20,000 gallons

Steel Tank Institute Permatank Interstitial Vacuum Monitor

Liquid Leaks

0.1gph/ A tank system should not be 

declared tight when the vacuum 

decreases (pressure increases) 5 

inches or more of mercury over the 

test period specified for each tank 

size./20,000 gallons.
17

STATISTICAL INVENTORY RECONCILIATION TEST METHOD (QUALITATIVE)

VENDOR EQUIPMENT NAME

LEAK RATE/THRESHOLD/

MAX TANK CAPACITY

Entropy Limited Precision Tank Inventory Control System, Version 90 0.1 gph/0.04 gph/15,000 gallons

Horner Products, Inc. SIR PRO 1, Version 1.0 0.2 gph/0.1 gph/18,000 gallons

SIR PRO 1, Version 2.0 0.1 gph/0.05 gph/18,000 gallons

Syscorp, Inc. Store Vision, Version E.2 0.2 gph/0.0834 gph/12,000 gallons

USTMAN Industries, Inc. YES SIR 90 0.2 gph/0.1 gph/15,000 gallons

STATISTICAL INVENTORY RECONCILIATION TEST METHOD (QUANTITATIVE)

VENDOR EQUIPMENT NAME

LEAK RATE/THRESHOLD/

MAX TANK CAPACITY

Advanced Telemetrics Tanknetics SIR, Version 2.1 0.2 gph/0.10 gph/45,000 gallons

0.1 gph/0.05 gph/45,000 gallons

Computerizing, Inc. Computank, Version 3.0 0.1 gph/0.05 gph/18,000 gallons

Entropy Limited Precision Tank Inventory Control System, Revision 90 0.1 gph/0.05 gph/22,500 gallons

EviroSIR LLC EnviroSIR Version 1.0 0.2 gph/0.10 or 0.15 gph

/45,000 gallons

0.1 gph/0.05 gph/45,000 gallons

Horner Products, Inc. SIR PRO 1 Version 3.0 0.2 gph/0.1 gph/33,000 gallons

SIR PRO 1 Version 4.0 0.1 gph/0.05 gph/33,000 gallons

Simmons Corp. SIR 5.7 0.1 gph/0.05 gph/18,000 gallons

SIR 5.7 LM 0.1 gph/0.05 gph/45,000 gallons

SIR International, Inc. Mitchell's SIR Program v.2.6 (12-13-91) 0.1 gph/0.05 gph/18,000 gallons

SIR Monitor (formerly 

Environmental 

Management 

Technologies)

SIR Monitor 0.1 gph/0.05 gph/18,000 gallons

Sir Phoenix, Inc. SIR PHOENIX 0.1 gph/0.05 gph/18,000 gallons

TeleData, Inc. TankMate, Version 3.20 0.1 gph/0.05 gph/60,000 gallons

USTMAN Industries, Inc. USTMAN SIR 1.91 0.1 gph/0.1 gph/18,000 gallons

USTMAN SIR, Version 94.1 0.1 gph/0.05 gph/30,000 gallons

USTMAN SIR, Versions 95.2, 95.2A 0.1 gph/0.05 gph/60,000 gallons

Warren Rogers 

Associates, Inc.

WRA Statistical Inventory Analysis, Version 5.1 0.1 gph/0.05 gph/18,000 gallons

WRA Statistical Inventory Analysis, Version 5.2 0.1 gph/0.05 gph/36,000 gallons

Watson Systems, Inc. 

(formerly EnviroQuest 

Technologies Limited)

SIRAS Software System Versions 2.0, 2.8.3 0.1 gph/0.05 gph/30,000 gallons

VAPOR-PHASE OUT-OF-TANK PRODUCT DETECTOR

VENDOR EQUIPMENT NAME OPERATING PRINCIPLE

Armstrong Monitoring 

Corp.

AMC 5100, Vapor Sensor AMC F4000 metal oxide semiconductor

Emco Electronics, Tuthill 

Corp.

EECO 1500, 2000, 3000, Leak Sensor, Leak Sensor II, Leak Sensor 

Jr.,(Q0002-001, 005 Sensors)

adsistor(Q0002-001 Sensor),

metal oxide semiconductor

(Q0002-005 Sensor)

Environmental Fuel 

Systems, Inc.

Fuel Finder Version IV adsorption sampling

FCI Environmental, Inc. Analog Hydrocarbon Probe AHP-100,

Digital Hydrocarbon Probe DHP-100

fiber optic

FDR Services, Inc. GasPak Vapor Monitoring System product permeable detector

Gilbarco Environmental 

Products

PA02660000000 adsistor

Mallory Controls Pollulert Probes MD221V, MD221VRA, MD210V, MD210VRA adsistor

Mine Safety Appliances Tankgard, P/N 481532, and

Tankgard VIII, P/N 488803

metal oxide semiconductor

NESCO (formerly Arizona 

Instrument Corp.)

Soil Sentry Twelve-X metal oxide semiconductor
18

VAPOR-PHASE OUT-OF-TANK PRODUCT DETECTOR (CONTINUED)

VENDOR EQUIPMENT NAME OPERATING PRINCIPLE

Petro Vend, Inc. Petrosentry TLD III, SiteSentinel, Smart Module and Vapor Sensor metal oxide semiconductor

Tidel Engineering, Inc. EMS-3000, 301-0328-001, 301-0330-001, and

EMS-3500, Vapor Sensor Probe Part No. 301-0634

adsistor

Tracer Research Corp. Tracer Tight chromatographic (looks for chemical 

tracer)

Universal Sensors and 

Devices, Inc.

Leak Alert System

Models LAV-100, LA-01, LA-02, LA-04, LA-X4, LA-08, CATLAS, 

LAVS-1 MOS Vapor Sensor

metal oxide semiconductor

Veeder-Root ILS-350, TLS-350 Series, Adsistor Vapor Probes (794390-700) adsistor

Warrick Controls, Inc. Model 5700 Meter, PVP-2 Sensor adsistor

VOLUMETRIC TANK TIGHTNESS TEST METHOD (OVERFILL)

VENDOR EQUIPMENT NAME

LEAK RATE/THRESHOLD/

MAX TANK CAPACITY

Absolute Precision Testing 

Systems

APT/BKG 1000 0.05 gph/0.02587 gph/6,000 gallons

Heath Consultants, Inc. Petro Comp 0.1 gph/0.05 gph/15,000 gallons

Petro Tite II 0.1 gph/0.05 gph/15,000 gallons

Horner EZY Check Horner EZY-Chek I 0.1 gph/0.05 gph/12,000 gallons

Horner EZY-Chek II 0.1 gph/0.05 gph/12,000 gallons

Ibex Industries Ibex Precision Test System 0.1 gph/0.05 gph/18,000 gallons

Leak Detection Systems, 

Inc.

Tank Auditor, Version RTD V.2.16 0.1 gph/0.05 gph/15,000 gallons.

Schuster Instruments Tel-A-Leak 1 0.1 gph/0.05 gph/15,000 gallons

Soiltest, Inc. Soiltest Ainlay Tank 'Tegrity' Tester, S-3 0.1 gph/0.05 gph/15,000 gallons

Tank Automation, Inc. Automated Precision Tank Testing System (APTT System), R-2 0.1 gph/0.05 gph/15,000 gallons

Western Environmental 

Resources

AES System II 0.1 gph/0.05 gph/15,000 gallons

AES System II

(Large Tanks)

0.1 gph/0.05 gph/75,000 gallons

VOLUMETRIC TANK TIGHTNESS TEST METHOD (OVERFILL)

(EDISON LAB PROTOCOL)

VENDOR EQUIPMENT NAME

LEAK RATE/THRESHOLD/

MAX TANK CAPACITY

Hasstech Leak Computer Tank Test System 0.1 gph/0.05 gph/12,000 gallons

VOLUMETRIC TANK TIGHTNESS TEST METHOD (UNDERFILL)

VENDOR EQUIPMENT NAME

LEAK RATE/THRESHOLD/

MAX TANK CAPACITY

Alert Technologies, Inc. Alert Model 1000 0.1 gph/0.05 gph/30,000 gallons

Hasstech Leak Computer Tank Test System 0.1 gph/0.05 gph/15,000 gallons

Horner EZY CHECK Horner EZY-Chek II 0.1 gph/0.05 gph/12,000 gallons

ProTank, Inc. VU-5000 Underfill Tester 0.1 gph/0.05 gph/18,000 gallons

VUP-5000 Underfill Tester 0.1 gph/0.05 gph/18,000 gallons

Tanknology - NDE Computerized VPLT Testing System 0.1 gph/0.05 gph/18,000 gallons

Sure Test - Assured Tight System, Series IV 0.1 gph/0.05 gph/18,000 gallons

Triangle Environmental, 

Inc.

TEI System 4000, Version 1.0 0.1 gph/0.05 gph/15,000 gallons

USTest, Inc. UST 2000/LL 0.1 gph/0.05 gph/15,000 gallons

UST 2000/P 0.1 gph/0.05 gph/45,000 gallons
19

[THIS PAGE INTENTIONALLY LEFT BLANK]
20

PART II

 LEAK DETECTION EQUIPMENT

SPECIFICATIONS

ALPHABETICAL BY COMPANY,

THEN BY TEST METHOD,

NEXT BY EQUIPMENT MODEL,

FINALLY BY LEAK RATE

Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

18

Revision Date: November 14, 1997

Absolute Precision Testing Systems

APT/BKG 1000

VOLUMETRIC TANK TIGHTNESS TEST METHOD (OVERFILL)

Certification: Leak rate of 0.05 gph with PD = 99.2310% and PFA = 0.5451%.

Leak Threshold: 0.02587 gph. A tank system should not be declared tight if the test result indicates 

a loss or gain that equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel, fuel oil #4, fuel oil #6, solvents.

Tank Capacity: Maximum of 6,000 gallons.

Tank must be minimum 100% full.

Waiting Time: Minimum of 36 hours between delivery and testing.

Minimum of 1.5 hours between “topping off” and testing.

Total minimum waiting time is 36 hours.

There must be no dispensing or delivery during waiting time.

Test Period: Minimum of 1 hour, 48 minutes.

Volume data is collected and recorded by a computer.

Leak rate is calculated from 1 minute of test.

There must be a minimum of 10 tests performed to conclusively declare a tank tight 

or declare a leak.

There must be no dispensing or delivery during test.

Temperature: Average for product is determined by a resistance temperature sensor.

Groundwater: Depth to groundwater in backfill must be determined. If groundwater is above bottom 

of tank, product level must be adjusted to provide a height difference of 6 feet 

between product and water level.

Calibration: Level sensors are calibrated before each test.

Temperature sensor must be checked and calibrated if necessary in accordance 

with manufacturer's instructions.

Comments: Not evaluated using manifold tank system.

Absolute Precision Testing Systems Evaluator: Dixon Consulting Inc.

P.O. Box 6715 Tel: (812) 332-4144

Bloomington, IN 47407 Date of Evaluation: 12/05/95

Tel: Unavailable
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

19

Revision Date: April 18,1997

Advanced Tank Technology, Inc.

Leak Tracer Dye (LTD)

LIQUID-PHASE OUT-OF-TANK PRODUCT DETECTOR

Detector:

Output type: qualitative

Sampling frequency: intermittent

Operating principle: product solubility - color development

Test Results:

unleaded gasoline synthetic gasoline

Detection time (sec) <1 <1

Fall time N/A* N/A

Lower detection limit (cm) <0.32 <0.32

*See glossary.

Specificity Results:

Activated: unleaded gasoline (above 23 ppm), synthetic gasoline (above 8 ppm), n-hexane, diesel fuel, jetA fuel, JP-4 jet fuel, toluene, xylene(s).

Manufacturer’s specifications:

Leak Tracer Dye develops color in alcohols, ketones, solvents, and PCBs as well as petroleum products.

Comments:

Sensors are not reusable, and must be replaced after contact with hydrocarbons.

Sensor is listed as “intermittent” because it must be checked periodically; it does not automatically alarm 

when hydrocarbon is detected.

Advanced Tank Technology, Inc. Evaluator: Scientific Information Services

820 N. Sylvania Tel: Not Available

Fort Worth, TX 76111 Date of Evaluation: 02/02/93

Tel: (817) 831-3246
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

20

Revision Date: September 11, 1998

Advanced Telemetrics

Tanknetics SIR, Version 2.1

STATISTICAL INVENTORY RECONCILIATION TEST METHOD (QUANTITATIVE)

Certification: Leak rate of 0.2 gph with PD = 99.9% and PFA = 0.1%.

Leak rate of 0.1 gph with PD = 99.9% and PFA = 0.5%.

Leak Threshold: 0.10 gph for leak rate of 0.2 gph. 

0.05 gph for leak rate of 0.1 gph

A tank system should not be declared tight if the test result indicates a loss or gain 

that equals or exceeds this threshold.

Applicability: Gasoline, diesel, aviation fuel, fuel oil #4.

Tank Capacity: Maximum of 45,000 gallons for single tanks.

Maximum of 45,000 gallons cumulative capacity for manifold tank systems with no 

more than 4 tanks in system.

Data Requirement: Minimum of 28 days of product level and flow through data.

Comments: 51% of the data sets were from manifold tank systems.

Of 41 data sets submitted for evaluation, all were analyzed with conclusive results.

Median monthly throughput of tanks evaluated was 18,897 gallons.

Leak rates ranging from 0.043 to 0.234 gph were used in evaluation.

Data sets evaluated were supplied by evaluator.

Advanced Telemetrics Evaluator: Ken Wilcox Associates

8800 Tradeway Tel: (816) 443-2494

San Antonio, TX. 78217 Date of Evaluation: 1/28/97

Tel: (800) 382-1482
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

21

Revision Date: April 18,1997

Agar Corp.

LEAKWISE Groundwater Monitor

ID-220 Series Hydrocarbon on Water Detector System

LIQUID-PHASE OUT-OF-TANK PRODUCT DETECTOR

Detector:

Output type: qualitative

Sampling frequency: continuous

Operating principle: radio frequency (RF) attenuation

Test Results:

unleaded gasoline synthetic gasoline

Detection time (sec) <1 <1

Fall time (sec) <1 <1

Lower detection limits (cm)

 "Standard" setting 0.16 0.32

 "Sensitive" setting 0.03 0.03

Specificity Results (in addition to above):

Activated: n-hexane, diesel fuel, jet-A fuel, toluene, xylene(s), water.

Manufacturer’s specifications:

Operating range: 

Resolution : 0.5 mm of hydrocarbon on water or brine

Variation : groundwater fluctuation of +/- 1 meter standard (larger variations optional)

Oil thickness : 0.3 - 25 mm optional (higher ranges available)

Temperature : 0 - 70 degrees C (higher available)

Comments: 

Sensors are reusable. 

Color coded signal lights indicate the presence of air, water, and hydrocarbon liquid when activated 

(yellow, green, and red, respectively).

Agar Corp. Evaluator: Ken Wilcox Associates, Inc.

1600 Townhurst Tel: (816) 443-2494

Houston, TX 77403 Date of Evaluation: 11/15/91

Tel: (713) 464-4451
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

22

Revision Date: November 14, 1997

Alert Technologies, Inc.

Alert Model 2000 In-Tank Mass Measurement Probe System

(Mass Buoyancy Probe)

AUTOMATIC TANK GAUGING METHOD

Certification: Leak rate of 0.2 gph with PD = 95.4% and PFA = 4.6% (calculated based on a 1-hour 

test).

Leak Threshold: 0.1 gph. A tank system should not be declared tight if the test result indicates a loss 

or gain that equals or exceeds this threshold.

Applicability: Gasoline, diesel, aviation fuel, fuel oil, waste oil, solvents.

Tank Capacity: Maximum of 15,000 gallons.

Tank must be between 50 and 95% full.

Waiting Time: Minimum of 15 hours between delivery and testing.

There must be no delivery during waiting time.

Test Period: Minimum of 2 hours. 

Test data are acquired and recorded by a computer. 

Leak rate is calculated from data determined to be valid by statistical analysis.

There must be no dispensing or delivery during test.

Temperature: Product measurement not required. System measures product mass (which is not 

affected by temperature) instead of product volume. 

Water Sensor: Must be used to detect water ingress.

Minimum detectable water level in the tank is 0.175 inch (0.27 inch for waste oil). 

Minimum detectable change in water level is 0.088 inch (0.031 inch for waste oil).

Calibration: Mass measurement probe and water sensor must be checked and calibrated, if 

necessary, in accordance with manufacturer’s instructions.

System is battery operated and does not automatically generate a hard copy of the 

leak test result. However, a hard copy of the results can be obtained by transfer of data 

to another unit (see manufacturer's instructions for further details). 

System is not equipped with any alarms (e.g. high water alarm, or failed leak test 

alarm).

Comments: Not evaluated using manifold tank systems.

Tests only portion of tank containing product.

As product level is lowered, leak rate in a leaking tank decreases (due to lower head 

pressure). Consistent testing at low levels could allow a leak to remain undetected.

EPA leak detection regulations require testing of the portion of the tank system which 

routinely contains product.

Alert Technologies, Inc. Evaluator: Midwest Research Institute

5400 NewPort Dr., Suite 13 Tel: (816) 753-7600

Rolling Meadows, IL 60008 Date of Evaluation: 03/11/91
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

23

Tel: (708) 392-0060
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

24

Revision Date: November 14, 1997

Alert Technologies, Inc.

Alert Ullage System Model 1050 

(Pressure and Vacuum Test)

NON-VOLUMETRIC TANK TIGHTNESS TEST METHOD (ULLAGE)

Certification: Leak rate of 0.1 gph with PD = 100% and PFA = 0%.

Leak Threshold: A tank system should not be declared tight if the ratio of the ultrasonic signal (when 

the tank is under pressure or vacuum) to the background signal (prior to 

pressurization or evacuation) equals or exceeds 1.5 for either 12 kHz or 25 kHz 

frequency band.

Applicability: Gasoline, diesel, aviation fuel, heavy fuel oils #2 through #6, waste oil, solvents.

Tank Capacity: Maximum ullage volume is 6,000 gallons.

Waiting time: None between delivery and testing if test is conducted after an underfilled tank 

tightness test.

Test Period: Minimum of 5 minutes.

Test data are acquired and recorded by a computer.

Test Pressure: Net pressure of 1.5 psi or vacuum of 1.0 psi must be maintained in ullage. 

Pressure or vacuum must be maintained in the tank with a loss of less than 0.4 psi.

Temperature: Ultrasonic and background signals are independent of product temperature. 

Groundwater: Depth to groundwater in backfill must be determined. If groundwater is present

outside ullage, vacuum test in ullage must not be used. 

Pressure test must be conducted using a net pressure of 1.5 psi in the ullage.

Calibration: System must be calibrated before each test.

Comments: Manifold tank systems must be isolated prior to test.

Evaluated using unleaded gasoline.

Tests only ullage portion of tank. 

Product-filled portion of tank must be tested using an underfill test method.

Vibration due to nearby equipment or dripping condensation may interfere with test.

Microphone was located 25 feet away from leak source during evaluation.

Vacuum test method may not be effective in some backfill (such as clay) because it 

may plug holes in tank.

If soil is saturated with product, air or water ingress may not be detected by vacuum 

test. A well point in the backfill may help identify presence of this condition.

Alert Technologies, Inc. Evaluator: Ken Wilcox Associates

5400 NewPort Dr., Suite 13 Tel: (816) 443-2494

Rolling Meadows, IL 60008 Date of Evaluation: 03/15/92

Tel: (708) 392-0060
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

25

Revision Date: November 14, 1997

Alert Technologies, Inc.

Alert Ullage System Model 1050 X (Vacuum Test)

NON-VOLUMETRIC TANK TIGHTNESS TEST METHOD (ULLAGE)

Certification: Leak rate of 0.1 gph with PD = 100% and PFA = 0%.

Leak Threshold: A tank system should not be declared tight if the ratio of the ultrasonic signal (when 

the tank is under vacuum) to the background signal (prior to evacuation) equals or 

exceeds 1.5 for either 12 kHz or 25 kHz frequency band.

Applicability: Gasoline, diesel, aviation fuel, heavy fuel oils #2 through #6, waste oil, solvents.

Tank Capacity: Maximum ullage volume is 24,000 gallons.

Waiting time: None between delivery and testing if test is conducted after an underfilled tank 

tightness test.

Test Period: Minimum of 5 minutes.

Test data are acquired and recorded by a computer.

Test Pressure: Vacuum of 1.5 psi must be maintained in ullage. 

Vacuum must be maintained in the tank with a loss of less than 0.4 psi.

Zero pressure (background) must produce a flat line response.

Temperature: Ultrasonic and background signals are independent of product temperature. 

Groundwater: Depth to groundwater in backfill must be determined. If groundwater is present 

outside ullage, test must not be used.

Calibration: System must be calibrated before each test.

Comments: Manifold tank systems must be isolated prior to test.

Evaluated using #4 fuel oil.

Tests only ullage portion of tank. 

Product-filled portion of tank must be tested using an underfill test method.

Vibration due to nearby equipment or dripping condensation may interfere with test.

Microphone was located 25 feet away from leak source during evaluation.

Vacuum test method may not be effective in some backfill (such as clay) because it 

may plug holes in tank.

If soil is saturated with product, air or water ingress may not be detected by vacuum 

test. A well point in the backfill may help identify presence of this condition.

Alert Technologies, Inc. Evaluator: Ken Wilcox Associates

5400 NewPort Dr., Suite 13 Tel: (816) 443-2494

Rolling Meadows, IL 60008 Date of Evaluation: 02/28/94

Tel: (708) 392-0060
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

26

Revision Date: November 14, 1997

Alert Technologies, Inc.

Alert Model 1000

VOLUMETRIC TANK TIGHTNESS TEST METHOD (UNDERFILL)

Certification: Leak rate of 0.1 gph with PD = 98.2% and PFA = 1.8% for 2 hr test.

Leak rate of 0.1 gph with PD = 99.8% and PFA = 0.2% for 4 hr test.

Leak Threshold: 0.05 gph. A tank system should not be declared tight if the test result indicates a 

loss or gain that equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel, fuel oils #4 and #6, waste oil, solvents. 

Other liquids may be tested after consultation with the manufacturer.

Tank Capacity: Maximum of 30,000 gallons.

Tank must be between 20 and 95% full.

Waiting time: Minimum of 1 hour between delivery and testing.

Minimum of 1 minute between dispensing and testing.

There must be no delivery during waiting time.

Test Period: Minimum of 2 hours to achieve PD = 98.2% and PFA = 1.8%.

Minimum of 4 hours to achieve PD = 99.8% and PFA = 0.2%.

Test data are acquired and recorded by a computer.

Leak rate is calculated from the data determined to be valid by statistical analysis.

There must be no dispensing or delivery during test.

Temperature: System measures product mass (which is not affected by temperature) instead of 

product volume. 

Groundwater: Depth to groundwater in backfill must be determined. If groundwater is above bottom 

of tank, product level must be adjusted to provide a minimum net pressure of 2 psi at 

bottom of tank during test. There must be a difference of at least 73 inches between 

groundwater level and product level to provide a net pressure of 2 psi at bottom of tank 

during test.

Calibration: Load cell must be calibrated before each test.

Comments: Not evaluated using manifold tank systems.

Tests only portion of tank containing product.

As product level is lowered, leak rate in a leaking tank decreases (due to lower head 

pressure). Consistent testing at low levels could allow a leak to remain undetected.

EPA leak detection regulations require testing of the portion of the tank system which 

routinely contains product.

Alert Technologies, Inc. Evaluator: Ken Wilcox Associates

5400 NewPort Dr., Suite 13 Tel: (816) 443-2494

Rolling Meadows, IL 60008 Date of Evaluation: 02/28/94

Tel: (708) 392-0060
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

27

Revision Date: November 14, 1997

Andover Controls Corp.

Andover Infinity

Versions CX9400, CX9200, CX9000, CMX240

(Magnetostrictive Probe)

AUTOMATIC TANK GAUGING METHOD

Certification: Leak rate of 0.2 gph with PD = 95.4% and PFA = 4.6%.

Leak Threshold: 0.1 gph. A tank system should not be declared tight if the test result indicates a loss 

or gain that equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel, fuel oil #4, solvents.

 Other liquids with known coefficients of expansion and density may be tested after 

consultation with the manufacturer.

Tank Capacity: Maximum of 30,000 gallons.

Tank must be between 50 and 95% full.

Waiting Time: Minimum of 6 hours between delivery and testing.

Minimum of 3 hours between dispensing and testing.

There must be no delivery during waiting time.

Test Period: Minimum of 6 hours.

Test data are acquired and recorded by a computer.

Leak rate is calculated as the average of subsets of all data collected.

There must be no dispensing or delivery during test.

Temperature: Average for product is determined by a minimum of 3 resistance temperature 

detectors (RTDs).

Water Sensor: Must be used to detect water ingress

Minimum detectable water level in the tank is 0.35 inch.

Minimum detectable change in water level is 0.0028 inch.

Calibration: RTDs and probe must be checked and calibrated in accordance with manufacturer's 

instructions.

Comments: Not evaluated using manifold tank systems.

Tests only portion of tank containing product.

As product level is lowered, leak rate in a leaking tank decreases (due to lower head 

pressure). Consistent testing at low levels could allow a leak to remain undetected.

EPA leak detection regulations require testing of the portion of the tank system which 

routinely contains product.

Andover Controls Corp. Evaluator: Ken Wilcox Associates

300 Brickstone Square Tel: (816) 443-2494

Andover, MA 01810 Date of Evaluation: 01/20/97

Tel: (978) 470-0555
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

28

Revision Date: November 14, 1997

Andover Controls Corp.

Andover Infinity

Versions CX9000, CX9200, CMX240

(Magnetostrictive Probe)

AUTOMATIC TANK GAUGING METHOD

Certification: Leak rate of 0.2 gph with PD = 99.9% and PFA < 0.1%.

Leak Threshold: 0.1 gph. A tank system should not be declared tight if the test result indicates a loss 

or gain that equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel, fuel oils #4 and #6, solvents. 

Other liquids with known coefficients of expansion and density may be tested after 

consultation with the manufacturer.

Tank Capacity: Maximum of 15,000 gallons.

Tank must be between 50 and 95% full.

Waiting Time: Minimum of 6 hours between delivery and testing.

Minimum of 3 hours between dispensing and testing.

There must be no delivery during waiting time.

Test Period: Minimum of 6 hours.

Test data are acquired and recorded by a computer. 

Leak rate is calculated as the average of subsets of all data collected.

There must be no dispensing or delivery during test.

Temperature: Average for product is determined by a minimum of 3 resistance temperature detectors 

(RTDs).

Water Sensor: Must be used to detect water ingress.

Minimum detectable water level in the tank is 0.35 inch.

Minimum detectable change in water level is 0.003 inch.

Calibration: RTDs and probe must be checked and calibrated in accordance with manufacturer's 

instructions.

Comments: Not evaluated using manifold tank systems.

Tests only portion of tank containing product.

As product level is lowered, leak rate in a leaking tank decreases (due to lower head 

pressure). Consistent testing at low levels could allow a leak to remain undetected.

EPA leak detection regulations require testing of the portion of the tank system which 

routinely contains product.

Andover Controls Corp. Evaluator: Ken Wilcox Associates

300 Brickstone Square Tel: (816) 443-2494

Andover, MA 01810 Date of Evaluation: 05/24/93

Tel: (978) 470-0555
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

29

Revision Date: November 14, 1997

Andover Controls Corp.

Andover Infinity

Versions CX9000, CX9200, CMX240

(Magnetostrictive Probe)

AUTOMATIC TANK GAUGING METHOD

Certification: Leak rate of 0.1 gph with PD = 97.6% and PFA = 2.4%.

Leak Threshold: 0.05 gph. A tank system should not be declared tight if the test result indicates a loss 

or gain that equals or exceeds this threshold.

Applicability: Gasoline, diesel, aviation fuel, fuel oils #4 and #6, solvents. 

Other liquids with known coefficients of expansion and density may be tested after 

consultation with the manufacturer.

Tank Capacity: Maximum of 15,000 gallons.

Tank must be between 50 and 95% full.

Waiting Time: Minimum of 6 hours between delivery and testing.

Minimum of 3 hours between dispensing and testing.

There must be no delivery during waiting time.

Test Period: Minimum of 6 hours.

Test data are acquired and recorded by a computer. 

Leak rate is calculated as the average of subsets of all data collected.

There must be no dispensing or delivery during test.

Temperature: Average for product is determined by a minimum of 3 resistance temperature detectors 

(RTDs).

Water Sensor: Must be used to detect water ingress.

Minimum detectable water level in the tank is 0.35 inch.

Minimum detectable change in water level is 0.003 inch.

Calibration: RTDs and probe must be checked and calibrated in accordance with manufacturer's 

instructions.

Comments: Not evaluated using manifold tank systems.

Tests only portion of tank containing product.

As product level is lowered, leak rate in a leaking tank decreases (due to lower head 

pressure). Consistent testing at low levels could allow a leak to remain undetected.

EPA leak detection regulations require testing of the portion of the tank system which 

routinely contains product.

Andover Controls Corp. Evaluator: Ken Wilcox Associates

300 Brickstone Square Tel: (816) 443-2494

Andover, MA 01810 Date of Evaluation: 05/24/93

Tel: (978) 470-0555
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

30

Revision Date: November 14, 1997

Andover Controls Corp.

Versions AC8+, AC256+ 

(Magnetostrictive Probe)

AUTOMATIC TANK GAUGING METHOD

Certification: Leak rate of 0.2 gph with PD = 99.5% and PFA = 0.5%.

Leak Threshold: 0.1 gph. A tank system should not be declared tight if the test result indicates a loss 

or gain that equals or exceeds this threshold.

Applicability: Gasoline, diesel, aviation fuel, fuel oil, solvents.

Tank Capacity: Maximum of 15,000 gallons.

Tank must be between 50 and 95% full.

Waiting Time: Minimum of 6 hours between delivery and testing.

Minimum of 4 hours between dispensing and testing.

There must be no delivery during waiting time.

Test Period: Minimum of 6 hours.

Test data are acquired and recorded by a computer. 

Leak rate is calculated as the difference between first and last data collected, divided 

by elapsed time between first and last volume changes observed.

There must be no dispensing or delivery during test.

Temperature: Average for product is determined by a minimum of 3 resistance temperature detectors 

(RTDs).

Water Sensor: Must be used to detect water ingress.

Minimum detectable water level in the tank is 0.99 inch.

Minimum detectable change in water level is 0.01 inch.

Calibration: RTDs and probe must be checked and calibrated in accordance with manufacturer's 

instructions.

Comments: Not evaluated using manifold tank systems.

Tests only portion of tank containing product.

As product level is lowered, leak rate in a leaking tank decreases (due to lower head 

pressure). Consistent testing at low levels could allow a leak to remain undetected.

EPA leak detection regulations require testing of the portion of the tank system which 

routinely contains product.

Andover Controls Corp. Evaluator: Ken Wilcox Associates

300 Brickstone Square Tel: (816) 443-2494

Andover, MA 01810 Date of Evaluation: 02/03/92

Tel: (978) 470-0555
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

31

Revision Date: September 11, 1998

Armstrong Monitoring Corporation

AMC 5100

Leak Detection Cable AMC-5007

LIQUID-PHASE OUT-OF-TANK PRODUCT DETECTOR

Detector:

Output type: qualitative

Sampling frequency: continuous

Operating principle: electrical conductivity

Test Results:*

unleaded gasoline

Detection time (sec) 35

Fall time (min:sec) 02:30

Lower detection limit (cm) 0.04

*For tests conducted with 0.32 cm of floating product.

Manufacturer’s specifications:

Operating temperature: 32 degrees F to 104 degrees F (0 degrees C to 40 degrees C).

Comments: 

Sensors are reusable.

Armstrong Monitoring Corporation Evaluator: Environment Canada

215 Colonnade Road South Tel: (613) 991-1108

Nepean, Ontario, Canada K2E 7K3 Date of Evaluation: 12/03/92

Tel: (800) 465-5777
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

32

Revision Date: September 11, 1998

Armstrong Monitoring Corporation

AMC 5100

Vapor Sensor AMC F4000

VAPOR-PHASE OUT-OF-TANK PRODUCT DETECTOR

Detector:

Output type: qualitative

Sampling frequency: continuous

Operating principle: metal oxide semiconductor

Test Results:

benzene

Detection time (sec) 10

Fall time (min:sec) 04:02

Lower detection limit (ppm) 300

Comments: 

Sensors are reusable.

Armstrong Monitoring Corporation Evaluator: Environment Canada

215 Colonnade Road South Tel: (613) 991-1108

Nepean, Ontario, Canada K2E 7K3 Date of Evaluation: 12/03/92

Tel: (800) 465-5777
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

33

Revision Date: August 23, 1999

ASTTest Services, Inc.

ASTTest Mass Balance Leak Detection System

BULK FIELD-CONSTRUCTED TANK TIGHTNESS TEST LEAK DETECTION METHOD

Certification: Leak rate is proportional to product surface area (PSA).

For tank with PSA of 5,575 ft2, leak rate is 0.88 gph with PD = 95% and PFA = 5%. For 

other tank sizes, leak rate equals [(PSA in ft2 ÷ 5,575 ft2) x 0.88 gph].

Example: For a tank with PSA = 10,000 ft2; leak rate = [(10,000 ft2 ÷ 5,575 ft2) x 0.88 

gph] = 1.578 gph.

Leak rate may not be scaled below 0.2 gph.

Leak Threshold: Leak threshold is proportional to product surface area (PSA).

For tanks with PSA of 5,575 ft2, leak threshold is 0.44 gph. For other tank sizes, leak 

threshold equals [(PSA in ft2 ÷ 5,575 ft2) x 0.44 gph].

Example: For a tank with PSA = 10,000 ft2; leak threshold = [(10,000 ft2 ÷ 5,575 ft2) x 

0.44 gph] = 0.789 gph.

A tank system should not be declared tight if the test result indicates a loss or gain 

that equals or exceeds the calculated leak threshold. 

Applicability: Diesel, aviation fuel, fuel oil, kerosene. Other liquids may be tested after consultation 

with the manufacturer.

Tank Capacity: Use limited to single field-constructed vertical tanks larger than 50,000 gallons. 

Maximum product surface area (PSA) is 13,938 ft2 (approximately 133 ft diameter).

Performance not sensitive to product level.

Waiting Time: Minimum of 48 hours after delivery or dispensing. Valve leaks and pump drain-back 

may mask a leak. Allow sufficient waiting time to minimize these effects. 

There must be no dispensing or delivery during waiting time.

Test Period: Minimum of 48 hours.

There must be no dispensing or delivery during test.

Temperature: Average for product is determined by a minimum of 10 thermistors.

Water Sensor: None. Water leaks are measured as changes in level inside tank.

Calibration: Level and temperature sensors must be checked regularly in accordance with 

manufacturer's instructions.

Comments: Tests only portion of tank containing product.

As product level is lowered, leak rate in a leaking tank decreases (due to lower head 

pressure). Consistent testing at low levels could allow a leak to remain undetected.

Evaluated in a nominal 2,000,000 gallon, vertical aboveground tank with product 

surface area (PSA) of 5,575 ft2. Tests conducted in a vertical wall underground tank 

may achieve better results. 

ASTTest Services, Inc. Evaluator: Albert Machlin, P.E.

2336 Hamlet Drive Tel: (212) 675-5868

Melbourne, FL 32934 Date of Evaluation: 11/98

Tel: (407) 242-1474
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

34

Revision Date: August 23, 1999

Beaudreau Electronics, Inc.

Models 404, 406 Pump Cut-Offs

LIQUID-PHASE INTERSTITIAL DETECTOR

Detector:

Output type: qualitative

Sampling frequency: continuous

Operating principle: float switch (Model 404), 

refractive index of liquids (Model 406)

Test Results:

Model 404 unleaded gasoline diesel fuel water

Detection time (sec) <1 <1 <1

Fall time manual reset manual reset manual reset

Precision (in) 0.0124 0.0167 0.0067

Lower detection limit (in) 0.89 0.72 0.68

Model 406

Detection time (sec) <1 <1 <1

Fall time manual reset manual reset manual reset

Precision (standard deviation) 0.003474 0.001923 0.005329

Lower detection limit (in) 0.357 0.321 0.369

Specificity Results:

Manufacturer and evaluator claim sensors will respond to any liquid.

Manufacturer’s Specifications:

Manufacturer states that system requires no calibration.

Comments:

Sensors are reusable. 

Beaudreau Electronics, Inc. Evaluator: Ken Wilcox Associates

23 Industrial Drive Tel: (816) 443-2494

Waterford, CT 06285-9715 Date of Evaluation: 07/20/94

Tel: (203) 443-6570
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

35

Revision Date: August 23, 1999

Beaudreau Electronics, Inc.

Models 510, 516 Discriminating Sensors

LIQUID-PHASE INTERSTITIAL DETECTOR

Detector:

Output type: qualitative, discriminating

Sampling frequency: continuous

Operating principle: polymer strip, hydrocarbon-only (Model 510),

optical sensor and conductivity (Model 516)

Test Results:

Model 510 Unleaded gasoline diesel fuel water

Detection time 5-10 min 1-2 hr <1 sec

Fall time (sec) <1 <1 <1

Precision - standard deviation (in) <0.0001 <0.0001 0.0045

Lower detection limit (in) 0.058 0.058 11.566

Model 516

Detection time (sec) <1 <1 <1

Fall time <1 <1 <1

Precision - standard deviation (in) 0.0038 0.0032 0.0020

Lower detection limit (in) 0.340 0.369 0.389

Specificity Results:

Manufacturer claims sensors will respond to any liquid. No additional materials tested.

Manufacturer’s Specifications:

Model 510 is designed to work with Beaudreau Model 404-4 or Model 500 Controllers.

Model 516 is designed to work with Beaudreau Model 500 or Model 512 Controllers and will not work with 

Model 404-4 Controller.

Comments:

Model 510 polymer strip must be replaced after contact with hydrocarbon.

Model 516 is designed to be placed in a sensor well in bottom of a containment sump with at least one 

other sensor mounted higher as a high-water cut-off.

Both models were not evaluated for ability to detect a layer of hydrocarbon on water. 

Manufacturer claims both models require no calibration.

Beaudreau Electronics, Inc. Evaluator: Ken Wilcox Associates

23 Industrial Drive Tel: (816) 443-2494

Waterford, CT 06285-9715 Date of Evaluation: 04/28/99

Tel: (203) 443-6570
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

36

Revision Date: September 11, 1998

Bell Avon, Inc.

VIGILANT Leak Detection System

PRESSURE/VACUUM INTERSTITIAL MONITOR

Certification: Leak rate of 0.1 gph with PD =100% and PFA =0%.

Leak Threshold: System alarms when changes in interstitial vacuum exceed a predetermined change 

in slope versus time curve.

Applicability: Gasoline, diesel, aviation fuel, fuel oils #4 and #6, waste oil. 

After consultation with the manufacturer, other liquids may be tested which are 

compatible with flexible liner.

Tank Capacity: Maximum of 15,000 gallons based on interstitial volume resulting when flexible liner 

is properly fitted and held in position against rigid tank wall.

No minimum product level during test.

Waiting Time: Minimum of 20 minutes between delivery and testing.

Test Period: Minimum of 40 minutes.

Comments: System is located within the interstitial space between a properly fitted and installed 

flexible liner inside a rigid tank.

Flexible liner is held in position by maintaining a vacuum on interstitial space.

Interstitial space is tested continuously.

System allows for permeation of vapor from stored substance into interstitial space.

Vapor discharged from vacuum pump must meet applicable air quality standards. 

Vapor recovery of product vapor from interstitial space is feasible when required.

System detects breaches in either flexible internal liner or rigid tank walls.

Bell Avon, Inc. Evaluator: Ken Wilcox Associates

1200 Martin Luther King, Jr. Blvd. Tel: (816) 443-2494

Picayune, MS 39466-5427 Date of Evaluation: 11/16/95

Tel: (601) 799-1217
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

37

Revision Date: November 14, 1997

Brooks KWK, Inc.

Leak Detection Systems,

KW-140, KW-240 Monitors with Types 1, 2 Sensors

LIQUID-PHASE OUT-OF-TANK PRODUCT DETECTOR

Detector:

Output type: qualitative

Sampling frequency: continuous

Operating principle: product soluble

Test Results:

Type 1 Sensor unleaded gasoline synthetic gasoline

Detection time (sec) 24 9

Fall time N/A* N/A

Lower detection limit (cm) 0.01 0.01

Type 2 Sensor

Detection time (min:sec) 14:39 08:45

Fall time N/A N/A

Lower detection limit (cm) 0.01 0.01

* See glossary.

Specificity Results (in addition to above):

Activated: n-hexane, diesel fuel, jet-A jet fuel, toluene, xylene(s).

Manufacturer’s specifications:

Type 1 sensor is recommended by manufacturer for detecting liquid and vapor gasoline, alcohol-blend 

fuels, and JP-4 jet fuel in wet or dry monitor wells.

Type 2 sensor is recommended by manufacturer for detecting fuel oils #1 and #2, A2M, JP-4 jet fuel, 

JP-5 jet fuel, unleaded gasoline, and alcohol blend fuels in wet monitoring wells only.

Comments:

Sensors are not reusable, and must be replaced after contact with hydrocarbons.

Formerly manufactured by In-Situ, Inc.

Brooks KWK, Inc. Evaluator: Carnegie Mellon Research Institute

RR 7, Box 141 Tel: (412) 268-3495

Wellsboro, PA 16901 Date of Evaluation: 07/29/91
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

38

Tel: (717) 724-6448
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

39

Revision Date: August 23, 1999

Caldon, Inc.

Caldon PF2000 Pipeline Leak Detection System for Bulk Pipelines

LARGE DIAMETER PIPELINE LEAK DETECTOR

Certification: Leak rate of 10 gph at 100 psi with PD > 95% and PFA < 5%.

(EPA defined equivalent 3.0 gph at 10 psi).

Leak Threshold: 8 gph. A pipeline system should not be declared tight if pressure decay or change 

in rate of decay in protected segment indicates a leak that exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel, fuel oil #4, solvents.

Specification: System tests fiberglass or steel piping up to 18 inches diameter.

Tests are normally conducted at operating pressures of 50 to 150 psi, but system 

may not work at pressures less that 75 psi, and may need to be 100 psi or higher.

System may be used on pipelines pressurized up to 400 psi

Pipeline Capacity: Maximum of 212,000 gallons.

 Evaluation conducted on straight piping runs with capacities to 106,000 gallons.

Waiting Time: None between delivery and testing.

None between dispensing and testing.

Test Period: Variable up to 15 minutes.

System Features: Permanent installation on pipeline.

 Automatic testing under static conditions.

Preset thresholds.

Single test to determine if pipeline is leaking.

Message display or printout, alarm activation if leak is declared.

Test data acquisition and calculation by computer.

Calibration: System must be checked annually and calibrated in accordance with manufacturer’s 

instructions.

Comments: According to vendor, system works in a complex piping network, can detect leaks 

developed between static test times, and is capable of detecting gradually 

increasing leaks once they reach the system's detection range. However, not all 

these features were demonstrated during this evaluation or other field demonstration 

testing.

Caldon, Inc. Evaluator: Ken Wilcox Associates

1070 Banksville Ave. Tel: (816) 443-2494

Pittsburgh, PA 15216 Date of Evaluation: 10/15/98

Tel: (412) 341-9920 
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

40

Revision Date: November 14, 1997

Caldwell Systems Corp.

Tank Manager

(Ultrasonic Probe)

AUTOMATIC TANK GAUGING METHOD

Certification: Leak rate of 0.2 gph with PD = 99.9% and PFA = 0.1%.

Leak Threshold: 0.10 gph. A tank system should not be declared tight if the test result indicates a 

loss or gain that equals or exceeds this threshold.

Applicability: Gasoline, diesel, aviation fuel, fuel oil #4, waste oil, solvents.

Other liquids may be tested after consultation with the manufacturer.

Tank Capacity: Maximum of 20,000 gallons.

Tank must be between 50 and 95% full.

Waiting Time: Minimum of 12 hours, 25 minutes between delivery and testing.

Minimum of 15 minutes between dispensing and testing.

There must be no delivery during waiting time.

Test Period: Minimum of 3 hours, 15 minutes. 

Test data are acquired and recorded by a computer. 

Leak rate is calculated from data determined to be valid by statistical analysis.

There must be no dispensing or delivery during test.

Temperature: Average for product is determined from the measurement of the change in the speed 

of sound. 

Water Sensor: Must be used to detect water ingress.

Minimum detectable water level in the tank is 0.921 inch. 

Minimum detectable change in water level is 0.0315 inch.

Calibration: Probe must be checked and calibrated in accordance with manufacturer’s 

instructions.

Comments: Not evaluated using manifold tank systems.

Tests only portion of tank containing product.

As product level is lowered, leak rate in a leaking tank decreases (due to lower head 

pressure). Consistent testing at low levels could allow a leak to remain undetected.

EPA leak detection regulations require testing of the portion of the tank system which 

routinely contains product.

Water sensor, temperature sensor and product level monitor are contained in a 

single ultrasonic probe.

Caldwell Systems Corp. Evaluator: Ken Wilcox Associates

600 South Sunset Street, Unit D Tel: (816) 443-2494

Longmont, CO 80501 Date of Evaluation: 04/22/96
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

41

Tel: (303) 684-8436
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

42

Revision Date: November 14, 1997

Caldwell Systems Corp.

Tank Manager

(Ultrasonic Probe)

AUTOMATIC TANK GAUGING METHOD

Certification: Leak rate of 0.1 gph with PD = 96.7% and PFA = 3.3%.

Leak Threshold: 0.05 gph. A tank system should not be declared tight if the test result indicates a 

loss or gain that equals or exceeds this threshold.

Applicability: Gasoline, diesel, aviation fuel, fuel oil #4, waste oil, solvents.

Other liquids may be tested after consultation with the manufacturer.

Tank Capacity: Maximum of 20,000 gallons.

Tank must be between 50 and 95% full.

Waiting Time: Minimum of 12 hours, 25 minutes between delivery and testing.

Minimum of 15 minutes between dispensing and testing.

There must be no delivery during waiting time.

Test Period: Minimum of 3 hours, 15 minutes. 

Test data are acquired and recorded by a computer. 

Leak rate is calculated from data determined to be valid by statistical analysis.

There must be no dispensing or delivery during test.

Temperature: Average for product is determined from the measurement of the change in the speed 

of sound. 

Water Sensor: Must be used to detect water ingress.

Minimum detectable water level in the tank is 0.921 inch. 

Minimum detectable change in water level is 0.0315 inch.

Calibration: Probe must be checked and calibrated in accordance with manufacturer’s 

instructions.

Comments: Not evaluated using manifold tank systems.

Tests only portion of tank containing product.

As product level is lowered, leak rate in a leaking tank decreases (due to lower head 

pressure). Consistent testing at low levels could allow a leak to remain undetected.

EPA leak detection regulations require testing of the portion of the tank system which 

routinely contains product.

Water sensor, temperature sensor and product level monitor are contained in a 

single ultrasonic probe.

Caldwell Systems Corp. Evaluator: Ken Wilcox Associates

600 South Sunset Street, Unit D Tel: (816) 443-2494

Longmont, CO 80501 Date of Evaluation: 04/22/96
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

43

Tel: (303) 684-8436
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

44

Revision Date: August 23, 1999

Caldwell Systems Corp.

Tank Manager Liquid Sensor, Version TMLIQ

LIQUID-PHASE INTERSTITIAL DETECTOR

Detector:

Output type: qualitative

Sampling frequency: continuous

Operating principle: ultrasonic

Test Results:

Horizontal Position unleaded gasoline diesel fuel water

Response time (sec) <1 <1 <1

Recovery time (sec) <1 <1 <1

Lower detection limit (cm) 1.28 1.30 2.43

Precision - standard deviation (cm) 0.05 0.06 0.25

Vertical Position

Response time (sec) <1 <1 <1

Recovery time (sec) <1 <1 <1

Lower detection limit (cm) 8.56 7.59 9.27

Precision - standard deviation (cm) 0.22 0.11 0.44

Specificity Results:

Evaluator claims sensor will detect fuels or other liquids.

Comments:

Sensors are reusable. 

Caldwell Systems Corp. Evaluator: Ken Wilcox Associates

600 South Sunset Street, Unit D Tel: (816) 443-2494

Longmont, CO 80501

Tel: (303) 684-8436 Date of Evaluation: 11/09/98
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

45

Revision Date: November 14, 1997

Campo/Miller, Inc.

LS300, LS300 N/C

AUTOMATIC ELECTRONIC LINE LEAK DETECTOR

Certification: Leak rate of 3 gph with PD = 96.2% and PFA = 0%.

Leak Threshold: 2.36 gph. A pipeline system should not be declared tight if the test result indicates 

a loss that equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuels, fuel oils #4 and #6, waste oil, kerosene, solvents.

Specification: System tests pressurized fiberglass and steel pipelines.

Tests are conducted at operating pressure.

Pipeline Capacity: Maximum of 35.36 gallons.

Waiting Time: None between delivery and testing.

None between dispensing and testing.

Test Period: Response time is 10 seconds.

Test data are acquired and recorded by a microprocessor.

System Features: Permanent installation on pipeline.

Automatic testing of pipeline.

Preset leak threshold.

Single leak test to determine if pipeline is leaking.

Pump shutdown, indicator light and alarm activation if leak is declared.

Calibration: Manufacturer recommends a weekly self check, activated by the operator, and a full 

functional test every 30 days, estimated to take 5 minutes to perform.

Campo/Miller, Inc. Evaluator: Jetronix Engineering Laboratories

P. O. Box 1809 Tel: (213) 377-4668

Porterville, CA 93258 Date of Evaluation: 06/01/91

Tel: (209) 781-6862 Evaluator: Ken Wilcox Associates

Tel: (816) 443-2494

Date of Revised Evaluation: 09/09/94 
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

46

Revision Date: November 14, 1997

Campo/Miller, Inc.

LS300-120, LS300-120 XLC

AUTOMATIC ELECTRONIC LINE LEAK DETECTOR

Certification: Leak rate of 3 gph with PD = 96.2% and PFA = 0%.

Leak Threshold: 2.36 gph. A pipeline system should not be declared tight if the test result indicates 

a loss that equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuels, fuel oils #4 and #6, waste oil, kerosene, solvents.

Specification: System tests pressurized fiberglass and steel pipelines.

Tests are conducted at operating pressure.

Pipeline Capacity: Maximum of 35.36 gallons.

Waiting Time: None between delivery and testing.

None between dispensing and testing.

Test Period: Response time is 10 seconds, but can be adjusted between 10 seconds and 2 

minutes, 30 seconds depending on the bulk modulus* of the piping system.

Test data are acquired and recorded by a microprocessor.

*See glossary.

System Features: Permanent installation on pipeline.

Automatic testing of pipeline.

Preset leak threshold.

Single test to determine if pipeline is leaking.

Pump shutdown, indicator light and alarm activation if leak is declared.

Calibration: Manufacturer recommends a weekly self check, activated by the operator, and a full 

functional test every 30 days, estimated to take 5 minutes to perform.

Campo/Miller, Inc. Evaluator: Jetronix Engineering Laboratories

P. O. Box 1809 Tel: (213) 377-4668

Porterville, CA 93258 Date of Evaluation: 06/01/91

Tel: (209) 781-6862 Evaluator: Ken Wilcox Associates

Tel: (816) 443-2494

Date of Revised Evaluation: 09/09/94
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

47

Revision Date: November 14, 1997

Campo/Miller, Inc.

LS300-120 PLUS, LS300-120 PLUS A/S

AUTOMATIC ELECTRONIC LINE LEAK DETECTOR

Certification: Leak rate of 3 gph with PD = 96.2% and PFA = 0%.

Leak Threshold: 2.36 gph. A pipeline system should not be declared tight if the test result indicates 

a loss that equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuels, fuel oils #4 and #6, waste oil, kerosene, solvents.

Specification: System tests pressurized fiberglass and steel pipelines.

Tests are conducted at operating pressure.

Pipeline Capacity: Maximum of 35.36 gallons.

Waiting Time: None between delivery and testing.

None between dispensing and testing.

Test Period: Response time is 10 seconds, but can be adjusted between 10 seconds and 2 

minutes, 30 seconds depending on the bulk modulus* of the piping system.

Test data are acquired and recorded by a microprocessor.

*See glossary

System Features: Permanent installation on pipeline.

Automatic testing of pipeline.

Preset threshold.

Single test to determine if pipeline is leaking.

Pump shutdown, indicator light and alarm activation if leak is declared.

Calibration: System must be checked annually and calibrated if necessary in accordance with 

manufacturer's instructions.

Campo/Miller, Inc. Evaluator: Jetronix Engineering Laboratories

P. O. Box 1809 Tel: (213) 377-4668 

Porterville, CA 93258 Date of Evaluation: 06/01/91

Tel: (209) 781-6862 Evaluator: Ken Wilcox Associates

Tel: (816) 443-2494

Date of Revised Evaluation: 09/09/94
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

48

Revision Date: November 14, 1997

Campo/Miller, Inc.

LS300-120 PLUS, AL; LS300-120 PLUS, AL, A/S; LS300-120 PLUS AL, LSI

AUTOMATIC ELECTRONIC LINE LEAK DETECTOR

Certification: Leak rateof 3 gph with PD = 100% and PFA = 0%.

Leak Threshold: 1.5 gph. A pipeline system should not be declared tight if the test result indicates a 

loss that equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuels, fuel oils #4 and #6, waste oil, kerosene, solvents.

Specification: System tests pressurized fiberglass and steel pipelines.

Tests are conducted at operating pressure.

Pipeline Capacity: Maximum of 163 gallons.

Waiting Time: None between delivery and testing.

None between dispensing and testing.

Test Period: Response time is 10 minutes.

Test data are acquired and recorded by a microprocessor.

System Features: Permanent installation on pipeline.

Automatic testing of pipeline every 45 minutes.

Preset threshold.

Triplicate testing to determine if pipeline is leaking.

Pump shutdown, indicator light and alarm activation if leak is declared.

Calibration: System must be checked annually and calibrated if necessary in accordance with 

manufacturer's instructions.

Campo/Miller, Inc. Evaluator: Ken Wilcox Associates

P. O. Box 1809 Tel: (816) 443-2494

Porterville, CA 93258 Date of Evaluation: 06/23/95

Tel: (209) 781-6862
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

49

Revision Date: November 14, 1997

Campo/Miller, Inc.

LS300-120 PLUS, AL; LS300-120 PLUS, AL, A/S; LS300-120 PLUS AL,LSI

AUTOMATIC ELECTRONIC LINE LEAK DETECTOR

Certification: Leak rateof 0.2 gph with PD = 100% and PFA = 0%.

Leak Threshold: 0.1 gph. A pipeline system should not be declared tight if the test result indicates a 

loss that equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuels, fuel oils #4 and #6, waste oil, kerosene, solvents.

Specification: System tests pressurized fiberglass and steel pipelines.

Tests are conducted at operating pressure.

Pipeline Capacity: Maximum of 163 gallons.

Waiting Time: None between delivery and testing.

Minimum of 3 hours between dispensing and testing.

Test Period: Minimum of 25 minutes.

Test data are acquired and recorded by a microprocessor.

System Features: Permanent installation on pipeline.

Automatic testing of pipeline when pump has been idle for 3 hours.

Preset threshold.

Triplicate testing to determine if pipeline is leaking.

Pump shutdown, indicator light and alarm activation if leak is declared.

Calibration: System must be checked annually and calibrated if necessary in accordance with 

manufacturer's instructions.

Campo/Miller, Inc. Evaluator: Ken Wilcox Associates

P. O. Box 1809 Tel: (816) 443-2494

Porterville, CA 93258 Date of Evaluation: 06/23/95

Tel: (209) 781-6862
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

50

Revision Date: November 14, 1997

Campo/Miller, Inc.

LS300-120 PLUS, AL; LS300-120 PLUS, AL, A/S; LS300-120 PLUS AL,LSI

AUTOMATIC ELECTRONIC LINE LEAK DETECTOR

Certification: Leak rate of 0.1 gph with PD = 100% and PFA = 0%.

Leak Threshold: 0.05 gph. A pipeline system should not be declared tight if the test result indicates 

a loss that equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuels, fuel oils #4 and #6, waste oil, kerosene, solvents.

Specification: System tests pressurized fiberglass and steel pipelines.

Tests are conducted at operating pressure.

Pipeline Capacity: Maximum of 163 gallons.

Waiting Time: None between delivery and testing.

Minimum of 6 hours between dispensing and testing.

Test Period: Minimum of 34 minutes.

Test data are acquired and recorded by a microprocessor.

System Features: Permanent installation on pipeline.

Automatic testing of pipeline when pump has been idle for 6 hours.

Preset threshold.

Triplicate testing to determine if pipeline is leaking.

Pump shutdown, indicator light and alarm activation if leak is declared.

Calibration: System must be checked annually and calibrated if necessary in accordance with 

manufacturer's instructions.

Campo/Miller, Inc. Evaluator: Ken Wilcox Associates

P. O. Box 1809 Tel: (816) 443-2494

Porterville, CA 93258 Date of Evaluation: 06/23/95

Tel: (209) 781-6862
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

51

Revision Date: August 23, 1999

Coggins Systems, Inc.

Leak Manager with Barton Series 3500 ATG (48 hour test)

BULK FIELD-CONSTRUCTED TANK TIGHTNESS TEST LEAK DETECTION METHOD

Certification: Leak rate is proportional to product surface area (PSA).

For tanks with PSA of 6,082 ft2, leak rate is 2.0 gph with PD = 97.8% and PFA = 2.2%. 

For other tank sizes, leak rate equals [(PSA in ft2 ÷ 6,082 ft2) x 2.0 gph].

Example: For a tank with PSA = 10,000 ft2; leak rate = [(10,000 ft2 ÷ 6,082 ft2) x 2.0 

gph] = 3.29 gph.

Calculated minimum detectable leak rate is 1.59 gph with PD = 95% and PFA = 5%.

Leak rate may not be scaled below 0.2 gph.

Leak Threshold: Leak threshold is proportional to product surface area (PSA).

For tanks with PSA of 6,082 ft2, leak threshold is 1.0 gph. For other tank sizes, leak 

threshold equals [(PSA in ft2 ÷ 6,082 ft2) x 1.0 gph].

Example: For a tank with PSA = 10,000 ft2; leak threshold = [(10,000 ft2 ÷ 6,082 ft2) x 

1.0 gph] = 1.64 gph.

A tank system should not be declared tight if the test result indicates a loss or gain 

that equals or exceeds the calculated leak threshold. 

Applicability: Gasoline, diesel, aviation fuel. Other liquids may be tested after consultation with the 

manufacturer.

Tank Capacity: Use limited to single field-constructed vertical tanks larger than 50,000 gallons. 

Maximum product surface area (PSA) is 15,205 ft2.

Performance not sensitive to product level.

Waiting Time: Minimum of 12 hours, 20 minutes after delivery or dispensing. Valve leaks and pump 

drain-back may mask a leak. Allow sufficient waiting time to minimize these effects. 

Waiting times during evaluation ranged from 7.3 to 17.2 hours.

Test Period: Minimum of 48 hours.

There must be no dispensing or delivery during test.

Temperature: Measurement not required by this system.

Water Sensor: None. Water leaks are measured as increase in mass inside tank.

Calibration: The differential pressure sensor must be checked regularly in accordance with 

manufacturer's instructions.

Comments: Tests only portion of tank containing product.

As product level is lowered, leak rate in a leaking tank decreases (due to lower head 

pressure). Consistent testing at low levels could allow a leak to remain undetected.

Evaluated in a nominal 600,000 gallon, vertical underground tank with product surface 

area (PSA) of 6,082 ft2.

Coggins Systems, Inc. Evaluator: Ken Wilcox Associates

5834 Peachtree Corners East Tel: (816) 443-2494

Norcross, GA 30092 Date of Evaluation: 05/20/98

Tel: (770) 447-9202
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

52

Revision Date: August 23, 1999

Coggins Systems, Inc.

Leak Manager with Barton Series 3500 ATG (72 hour test)

BULK FIELD-CONSTRUCTED TANK TIGHTNESS TEST LEAK DETECTION METHOD

Certification: Leak rate is proportional to product surface area (PSA).

For tanks with PSA of 6,082 ft2, leak rate is 2.0 gph with PD = 98.5% and PFA = 1.5%. 

For other tank sizes, leak rate equals [(PSA in ft2 ÷ 6,082 ft2) x 2.0 gph].

Example: For a tank with PSA = 10,000 ft2; leak rate = [(10,000 ft2 ÷ 6,082 ft2) x 2.0 

gph] = 3.29 gph.

Calculated minimum detectable leak rate is 1.44 gph with PD = 95% and PFA = 5%.

Leak rate may not be scaled below 0.2 gph.

Leak Threshold: Leak threshold is proportional to product surface area (PSA).

For tanks with PSA of 6,082 ft2, leak threshold is 1.0 gph. For other tank sizes, leak 

threshold equals [(PSA in ft2 ÷ 6,082 ft2) x 1.0 gph].

Example: For a tank with PSA = 10,000 ft2; leak threshold = [(10,000 ft2 ÷ 6,082 ft2) x 

1.0 gph] = 1.64 gph.

A tank system should not be declared tight if the test result indicates a loss or gain 

that equals or exceeds the calculated leak threshold. 

Applicability: Gasoline, diesel, aviation fuel. Other liquids may be tested after consultation with the 

manufacturer.

Tank Capacity: Use limited to single field-constructed vertical tanks larger than 50,000 gallons. 

Maximum product surface area (PSA) is 15,205 ft2.

Performance not sensitive to product level.

Waiting Time: Minimum of 12 hours, 20 minutes after delivery or dispensing. Valve leaks and pump 

drain-back may mask a leak. Allow sufficient waiting time to minimize these effects. 

Waiting times during evaluation ranged from 7.3 to 17.2 hours.

Test Period: Minimum of 72 hours.

There must be no dispensing or delivery during test.

Temperature: Measurement not required by this system.

Water Sensor: None. Water leaks are measured as increase in mass inside tank.

Calibration: The differential pressure sensor must be checked regularly in accordance with 

manufacturer's instructions.

Comments: Tests only portion of tank containing product.

As product level is lowered, leak rate in a leaking tank decreases (due to lower head 

pressure). Consistent testing at low levels could allow a leak to remain undetected.

Evaluated in a nominal 600,000 gallon, vertical underground tank with product surface 

area (PSA) of 6,082 ft2.

Coggins Systems, Inc. Evaluator: Ken Wilcox Associates

5834 Peachtree Corners East Tel: (816) 443-2494

Norcross, GA 30092 Date of Evaluation: 05/20/98

Tel: (770) 447-9202
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

53

Revision Date: November 14, 1997

Computerizing, Inc.

Computank, Version 3.0

STATISTICAL INVENTORY RECONCILIATION TEST METHOD (QUANTITATIVE)

Certification: Leak rate of 0.1 gph with PD = 99.5% and PFA = 2%.

Leak Threshold: 0.05 gph. A tank system should not be declared tight if the test result indicates a 

loss or gain that equals or exceeds this threshold.

Applicability: Gasoline, diesel, aviation fuel, fuel oil #4.

Tank Capacity: Maximum of 18,000 gallons.

Data Requirement: Minimum of 30 days of usable product level and flow through data are required.

Comments: Not evaluated using data from manifold tank systems.

Of 41 data sets submitted for evaluation, 17 were not analyzed.

Median monthly throughput of tanks evaluated was 2,340 gallons.

Leak rates of 0.05, 0.1, and 0.2 gph were used in evaluation.

Data sets evaluated were supplied by evaluator.

 

 

 

Computerizing, Inc. Evaluator: Ken Wilcox Associates

PO Box 99 Tel: (816) 443-2494

Scottsboro, AL 35768 Date of Evaluation: 09/17/92

Tel: (256) 259-1805
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

54

Revision Date: August 23, 1999

Containment Solutions, Inc.

(formerly Fluid Containment which was formerly O/C Tanks)

Hydrostatic Precision Tank Test for DWT-Type II Tanks

DOUBLE WALLED TANK TIGHTNESS TEST METHOD

Certification: Leak rate of 0.1 gph with PD = 99.9% and PFA = 1.2% without dispensing.

Leak rate of 0.1 gph with PD = 95% and PFA = 5.0% with dispensing.

Leak Threshold: 0.05 gph without dispensing and 0.07 gph with dispensing. A tank system should 

not be declared tight if the test result indicates a loss or gain that equals or exceeds 

this threshold. 

Applicability: Gasoline, diesel, aviation fuel, fuel oil #4.

Tank Capacity: Maximum of 30,000 gallons.

Tank must be between 0 and 100% full.

Maximum tank diameter is 10 feet.

Waiting Time: Minimum of 24 hours between delivery and testing.

Minimum of 3 hours between "topping off" the annular space with liquid and testing.

There must be no delivery during waiting time.

Test Period: Minimum of 4 hours.

A leak is not declared unless the threshold is exceeded in two tests, separated by 

at least 8 hours which are performed without dispensing and with minimal changes 

in groundwater elevation above bottom of tank as described below.

Other Limitations: Volume of trapped vapor must not exceed 20 gallons. 

 Change in barometric pressure must be less than 0.04 psia over the 4-hour test 

 period. 

 Annular space must be at least 100% full with either water or antifreeze. 

 If groundwater is above bottom of tank, and no product is being dispensed during 

test, total change in groundwater elevation during test must be less than 1.5 inches 

per hour. 

If groundwater is below bottom of tank or not changing during test, total change in 

product level during test must be less than 0.75 inch per hour.

Containment Solutions, Inc. Evaluator: Vista Research

5150 Jefferson Chemical Rd. Tel: (415) 966-1171

Conroe, TX 77301-6834 Date of Evaluation: 05/15/91

Tel: (800) 628-2657
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

55

Revision Date: August 23, 1999

Containment Solutions, Inc.

(formerly Fluid Containment which was formerly O/C Tanks)

FCI Liquid Filled Interstitial Monitor

Tank Model DWT6 with Model FHRB 810 Level Sensor

LIQUID-PHASE INTERSTITIAL DETECTOR

Detector:

Output type: qualitative, non-discriminating (aqueous solution only)

Sampling frequency: continuous

Operating principle: float switch

Test Results:

System is capable of detecting leaks of 0.1 gph or smaller within one month for all size tanks 

manufactured by Containment Solutions, Inc. at time of evaluation. Estimated time to activate alarm, 

given a leak rate of 0.1 gph and assuming initial reservoir is 2 inches below full, ranges from 4 hours for a 

500 gallon tank to 267 hours for a 50,000 gallon tank. Minimum detectable leak for alarm within one 

month ranges from 0.0047gph for a 500 gallon tank to 0.0185 gph for a 50,000 gallon tank, if initial 

reservoir level is 50%. Other test results listed below.

Evaluation variable Range of conditions

Estimated range of effect for 

gasoline on brine level (in)

Product level change in tank From 0% to 90% 2.0

Water table changes 48 inches change 1.6

Temperature changes From 40 to 100 degrees F. 1.8

Vapor trapped in interstice 

(with temperature change)

45 gallons air trapped 

(with temperature change 

from 40 to 100 degrees F.)

<2

Manufacturer’s Specifications:

Fluid in reservoir must be filled to proper level.

When alarm condition exists, or annually, sensor must be removed and tested in a bucket of water, 

according to manufacturer's instructions.

Comments:

Evaluation conducted on DWT6 20,000 gallon tank with a R28 reservoir and FHRB 810 sensor.

Evaluation parameters included: tank product level changes, water table changes, temperature changes, 

measurement of trapped vapor in the interstice, leak effects on the liquid-filled interstice, and scaling 

factors (application to various tank sizes).

System was not evaluated for ability to detect layer of hydrocarbon on water.

Containment Solutions, Inc. Evaluator: Ken Wilcox Associates

5150 Jefferson Chemical Rd. Tel: (816) 443-2494

Conroe, TX 77301-6834 Date of Evaluation: 06/15/98

Tel: (800) 628-2657
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

56

Revision Date: November 14, 1997

Control Engineers

Line Leak Detector 

Model LLP2

AUTOMATIC ELECTRONIC LINE LEAK DETECTOR

Certification: Leak rate of 3.0 gph with PD = 100% and PFA = 0%.

Leak Threshold: 1.88 gph. A pipeline system should not be declared tight if the test result indicates 

a loss that equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel.

Specification: System tests pressurized fiberglass and steel pipelines.

Tests are conducted at operating pressure.

Pipeline Capacity: Maximum of 89 gallons.

Waiting Time: None between delivery and testing.

None between dispensing and testing.

Test Period: Response time is approximately 10 seconds.

Test data are acquired and recorded by a permanently installed microprocessor. 

Calculations are automatically performed by a microprocessor.

System Features: Permanent installation on pipeline.

Automatic testing of pipeline.

Preset threshold.

Single test to determine if pipeline is leaking.

Pump shutdown, indicator light and alarm activation if leak is declared.

Calibration: System must be checked annually and calibrated if necessary in accordance with 

manufacturer's instructions.

Comments: Control Engineers no longer manufactures this equipment.

The company and rights for this product were sold to Veeder-Root.

*For product support information, contact Veeder-Root.

Veeder-Root* Evaluator: Midwest Research Institute

125 Powder Forest Dr. Tel: (816) 753-7600

Simsbury, CT 06070-2003 Date of Evaluation: 07/18/94

Tel: (860) 561-2700
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

57

Revision Date: November 14, 1997

Control Engineers

Line Leak Detector 

Model LLP2

AUTOMATIC ELECTRONIC LINE LEAK DETECTOR

Certification: Leak rate of 0.1 gph with PD = 100% and PFA = 0%. 

Leak Threshold: 0.05 gph. A pipeline system should not be declared tight if the test result indicates 

a loss that equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel.

Specification: System tests pressurized fiberglass and steel pipelines.

Tests are conducted at operating pressure.

Pipeline Capacity: Maximum of 89 gallons.

Waiting Time: None between delivery and testing. 

Minimum of 15 minutes between dispensing and testing.

Test Period: Minimum of 30 minutes.

Test data are acquired and recorded by a permanently installed microprocessor.

Calculations are automatically performed by a microprocessor.

System Features: Permanent installation on pipeline.

Automatic testing of pipeline.

Preset threshold.

Single test to determine if pipeline is leaking.

Pump shutdown, indicator light and alarm activation if leak is declared.

Calibration: System must be checked annually and calibrated if necessary in accordance with 

manufacturer's instructions.

Comments: Control Engineers no longer manufactures this equipment.

The company and rights for this product were sold to Veeder-Root.

*For product support information, contact Veeder-Root.

Veeder-Root* Evaluator: Midwest Research Institute

125 Powder Forest Dr. Tel: (816) 753-7600

Simsbury, CT 06070-2003 Date of Evaluation: 07/18/94

Tel: (860) 561-2700
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

58

Revision Date: November 14, 1997

Control Engineers

CEI 3000 Tank Level Module - Version TLP2 

Normal/Rapid Test Mode

(Magnetostrictive Probe)

AUTOMATIC TANK GAUGING METHOD

Certification: Leak rate of 0.2 gph with PD = 95.0% and PFA = 0.1% in normal test mode.

Leak rate of 0.2 gph with PD = 95.0% and PFA = 5.0% in rapid test mode.

Leak Threshold: 0.1 gph. A tank system should not be declared tight if the test result indicates a loss 

or gain that equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel.

Tank Capacity: Maximum of 15,000 gallons.

Tank must be between 50 and 95% full.

Waiting Time: Minimum of 6 hours, 40 minutes between delivery and testing.

There must be no dispensing or delivery during waiting time.

Test Period: Minimum of 4 hours for normal test mode and 1 hour, 12 minutes for rapid test mode.

Test data are acquired and recorded by a microprocessor.

Leak rate is calculated from data determined to be valid by statistical analysis.

There must be no dispensing or delivery during test.

Temperature: Average for product is determined by a minimum of 5 temperature resistance detectors 

(RTDs).

Water Sensor: Must be used to detect water ingress.

Minimum detectable water level in the tank is 0.49 inch.

Minimum detectable change in water level is 0.05 inch.

Calibration: RTDs and probe must be checked and calibrated in accordance with manufacturer's 

instructions.

Comments: Not evaluated using manifold tank systems.

Tests only portion of tank containing product.

As product level is lowered, leak rate in a leaking tank decreases (due to lower head 

pressure). Consistent testing at low levels could allow a leak to remain undetected.

EPA leak detection regulations require testing of the portion of the tank system which 

routinely contains product.

Control Engineers no longer manufactures this equipment.

The company and rights for this product were sold to Veeder-Root.

*For product support information, contact Veeder-Root.

Veeder-Root* Evaluator: Midwest Research Institute

125 Powder Forest Dr. Tel: (816) 753-7600

Simsbury, CT 06070-2003 Date of Evaluation: 05/27/92

Tel: (860) 561-2700
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

59

Revision Date: November 14, 1997

Control Engineers

CEI 3000 Tank Level Module - Version TLP2

Normal/Rapid Test Mode

(Magnetostrictive Probe)

AUTOMATIC TANK GAUGING METHOD

Certification: Leak rate of 0.1 gph with PD = 99.2% and PFA = 0.08% in normal test mode.

Leak rate of 0.1 gph with PD = 95.0% and PFA = 5.0% in rapid test mode.

Leak Threshold: 0.05 gph. A tank system should not be declared tight if the test result indicates a 

loss or gain that equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel

Tank Capacity: Maximum of 15,000 gallons.

Tank must be minimum 95% full.

Waiting Time: Minimum of 6 hours, 40 minutes between delivery and testing.

There must be no dispensing or delivery during waiting time.

Test Period: Minimum of 6 hours, 23 minutes for normal test mode and 2 hours, 40 minutes for 

rapid test mode.

Test data are acquired and recorded by a microprocessor.

Leak rate is calculated from data determined to be valid by statistical analysis.

There must be no dispensing or delivery during test.

Temperature: Average for product is determined by a minimum of 5 temperature resistance 

detectors (RTDs).

Water Sensor: Must be used to detect water ingress.

Minimum detectable water level in the tank is 0.49 inch.

Minimum detectable change in water level is 0.05 inch.

Calibration: RTDs and probe must be checked and calibrated in accordance with manufacturer's 

instructions.

Comments: Not evaluated using manifold tank systems.

Tests only portion of tank containing product.

As product level is lowered, leak rate in a leaking tank decreases (due to lower head 

pressure). Consistent testing at low levels could allow a leak to remain undetected.

EPA leak detection regulations require testing of the portion of the tank system which 

routinely contains product.

Control Engineers no longer manufactures this equipment.

The company and rights for this product were sold to Veeder-Root.

*For product support information, contact Veeder-Root.

Veeder-Root* Evaluator: Midwest Research Institute

125 Powder Forest Dr. Tel: (816) 753-7600

Simsbury, CT 06070-2003 Date of Evaluation: 05/21/92

Tel: (860) 561-2700
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

60

Revision Date: November 14, 1997

EBW, INC.

Auto-Stik II, Auto-Stik Jr.

(Magnetostrictive Probe)

AUTOMATIC TANK GAUGING METHOD

Certification: Leak rate of 0.2 gph with PD = 99.9% and PFA = 0.1%.

Leak Threshold: 0.1 gph. A tank system should not be declared tight if the test result indicates a loss 

or gain that equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel, fuel oils #4 and #6, solvents.

 Other liquids with known coefficients of expansion and density may be tested after 

consultation with the manufacturer.

Tank Capacity: Maximum of 15,000 gallons.

Tank must be between 50 and 95% full.

Waiting Time: Minimum of 6 hours between delivery and testing. 

Minimum of 6 hours between dispensing and testing.

There must be no delivery during waiting time.

Test Period: Minimum of 4 hours.

Test data are acquired and recorded by a computer.

Leak rate is calculated from average of subsets of all data collected.

There must be no dispensing or delivery during test.

Temperature: Average for product is determined by a minimum of 5 thermistors.

Water Sensor: Must be used to detect water ingress.

Minimum detectable water level in the tank is 0.49 inch.

Minimum detectable water level change is 0.0052 inch.

Calibration: Thermistors and probe must be checked and calibrated in accordance with 

manufacturer's instructions.

Comments: Not evaluated using manifold tank systems.

Tests only portion of tank containing product.

As product level is lowered, leak rate in a leaking tank decreases (due to lower head 

pressure). Consistent testing at low levels could allow a leak to remain undetected.

EPA leak detection regulations require testing of the portion of the tank system which 

routinely contains product.

Auto Stik Jr. is used with up to 4 magnetostrictive probes and can handle up to 8 input 

sensors.

Auto Stik II is used with up to 16 magnetostrictive probes and can handle up to 64 

input sensors.

EBW, INC. Evaluator: Ken Wilcox Associates

P.O. Box 689 Tel: (816) 443-2494

Muskegon, MI 49443 Date of Evaluation: 08/20/93

Tel: (800) 475-5151
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

61

Revision Date: November 14, 1997

EBW, INC.

Auto-Stik II, Auto-Stik Jr.

(Magnetostrictive Probe)

AUTOMATIC TANK GAUGING METHOD

Certification: Leak rate of 0.1 gph with PD = 98.3% and PFA = 1.7%.

Leak Threshold: 0.05 gph. A tank system should not be declared tight if the test result indicates a loss 

or gain that equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel, fuel oils #4 and #6, solvents.

 Other liquids with known coefficients of expansion and density may be tested after 

consultation with the manufacturer.

Tank Capacity: Maximum of 15,000 gallons.

Tank must be between 50 and 95% full.

Waiting Time: Minimum of 6 hours between delivery and testing.

Minimum of 2 hours between dispensing and testing.

There must be no dispensing or delivery during waiting time.

Test Period: Minimum of 4 hours.

Test data are acquired and recorded by a computer. 

Leak rate is calculated from average of subsets of all data collected.

There must be no dispensing or delivery during test.

Temperature: Average for product is determined by a minimum of 5 thermistors.

Water Sensor: Must be used to detect water ingress.

Minimum detectable water level in the tank is 0.49 inch.

Minimum detectable water level change is 0.0052 inch.

Calibration: Thermistors and probe must be checked and calibrated in accordance with 

manufacturer's instructions.

Comments: Not evaluated using manifold tank systems.

Tests only portion of tank containing product.

As product level is lowered, leak rate in a leaking tank decreases (due to lower head 

pressure). Consistent testing at low levels could allow a leak to remain undetected.

EPA leak detection regulations require testing of the portion of the tank system which 

routinely contains product.

Auto Stik Jr. is used with up to 4 magnetostrictive probes and can handle up to 8 input 

sensors.

Auto Stik II is used with up to 16 magnetostrictive probes and can handle up to 64 

input sensors.

EBW, INC. Evaluator: Ken Wilcox Associates

P.O. Box 689 Tel: (816) 443-2494

Muskegon, MI 49443 Date of Evaluation: 08/20/93

Tel: (800) 475-5151
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

62

Revision Date: August 23, 1999

EBW, Inc.

AUTO-STIK Discriminating Sensors

LS-5, LS-35, LS-3A, LS-30A, LS-7

LIQUID-PHASE INTERSTITIAL DETECTOR

Detector:

Output type: qualitative

Sampling frequency: continuous

Operating principle: float switch (all models), product permeability (LS-5, LS-35)

Test Results:

LS-5, LS-35 (float switches) unleaded gasoline diesel fuel water

Detection time (sec) <1 <1 <1

Fall time (sec) <1 <1 <1

Lower detection limit (cm) 1.317 1.23 1.156

LS-5, LS-35 (polymer strips)

Detection time (min) ~7 ~60 N/A*

Fall time (sec) N/A N/A N/A

Lower detection limit (cm) <0.014 <0.014 N/A

LS-3A (N.C. and N.O.)

Detection time (sec) <1 <1 <1

Fall time (sec) <1 <1 <1

Lower detection limit (cm) 2.59 2.38 2.08

LS-30A (low level)

Detection time (sec) <1 <1 <1

Fall time (sec) <1 <1 <1

Lower detection limit (cm) 8.79 8.48 8.15

LS-30A (high level)

Detection time (sec) <1 <1 <1

Fall time (sec) <1 <1 <1

Lower detection limit (cm) 23.65 23.04 22.78

LS-7

Detection time (sec) <1 N/A <1

Fall time (sec) <1 N/A <1

Lower detection limit (cm) 1.09 N/A 0.81

*See glossary.

Specificity Results:

Manufacturer and evaluator claim that sensors will respond to any liquid, except for the polymer strip 

sensor, which will not respond to water.

Manufacturer’s Specifications:

There is no manufacturer’s recommended maintenance schedule.

Comments:

Polymer sensor can be reset by exposing it to air.

Sensors are reusable. 

EBW, INC. Evaluator: Ken Wilcox Associates

P.O. Box 689 Tel: (816) 443-2494

Muskegon, MI 49443 Dates of Evaluation: 04/20/93, 07/05/94

Tel: (800) 475-5151
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

63

Revision Date: August 23, 1999

EBW, Inc.

AUTO-STIK Discriminating Sensors

LS-10, LS-15, LS-20

LIQUID-PHASE OUT-OF-TANK PRODUCT DETECTOR

Detector:

Output type: qualitative

Sampling frequency: continuous

Operating principle: float switch and product permeability

Test Results:

LS-10, LS-15, LS-20 (float switches) unleaded gasoline diesel fuel water

Detection time (sec) <1 <1 <1

Fall time (sec) <1 <1 <1

Lower detection limit (in) 2.870 2.822 2.667

LS-10, LS-15, LS-20 (polymer strip)

Detection time (min) ~7 ~60 N/A*

Fall time (sec) N/A N/A N/A

Lower detection limit (in) <0.014 <0.014 N/A

*See glossary.

Specificity Results:

Manufacturer and evaluator claim sensors will respond to any liquid, except polymer strip will not respond 

to water.

Manufacturer’s specifications:

Operating temperature: -20 degrees F to 150 degrees F( -28.9 degrees C to 65.5 degrees C).

There is no manufacturer’s recommended maintenance schedule.

Comments: 

Polymer sensor can be reset by exposing it to air.

Sensors are reusable.

This evaluation also included the LS-5 and LS-35 interstitial detectors, which are listed separately.

EBW, INC. Evaluator: Ken Wilcox Associates

P.O. Box 689 Tel: (816) 443-2494

Muskegon, MI 49443 Date of Evaluation: 07/05/94

Tel: (800)475-5151
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

64

Revision Date: November 14, 1997

EFA Technologies, Inc.

LeakNet

LARGE DIAMETER PIPELINE LEAK DETECTOR

Certification: Leak rate of 3.0 gph at 10 psi with PD = 100% and PFA = 0%.

Leak Threshold: 2.2 gph. A pipeline system should not be declared tight if the test result indicates a loss or 

gain that equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuels, fuel oil #4, waste oil, solvents.

Specification: System tests pressurized bulk material transfer pipelines. 

Suitable for all pressurized steel, plastic, fiberglass, or concrete pipelines.

System is used as an equivalent 3 gph line leak detector. 

Leak detection flow rates are proportional to pressure in pipeline.

Testing is conducted while the product is not flowing in the pipeline.

Pipeline must be full and under pressure. 

Gravity feed pipelines under constant static head pressure may be tested with system.

Pipeline Capacity: Maximum of 116,230 gallons.

System tested on 58,115 gallon pipeline.

Use of pipeline test protocol allows system to be used on pipelines twice the volume of 

test pipeline. Contact manufacturer prior to using on pipelines exceeding 58,115 gallons 

through 116,230 gallons.

Waiting Time: None between delivery and testing.

None between dispensing and testing.

Test Period: Response time is 2 to 5 minutes.

Test data are acquired and recorded by a computer.

Calculations are automatically performed by computer.

System Features: Permanent installation on pipeline.

Automatic testing of pipeline at least once per hour under static conditions.

Continuous operation during flowing conditions (however, thresholds are higher due to 

hydraulic noise in pipeline).

Declaration of leak if current changes in pressure exceed tuning parameters, or if pressure 

fluctuates in a manner that is characteristic of a leak.

Pump shutdown, indicator light and alarm activation if leak is declared.

Calibration: System must be checked annually. Standard electronic field instruments used by the 

system requires normal annual inspection and calibration checks.

Comments: Designed to replace a mechanical line leak detector to detect equivalent 3 gph releases at 

10 psi on large pipelines at pressures higher than those found at typical service station.

EFA Technologies, Inc. Evaluator: Ms. Terri Regan -

116 20th St. Naval Facilities Engineering Service Center
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

65

Sacramento, CA 95814 Tel: (202) 433-5196

Tel: (916) 443-8842 Date of Evaluation: 09/26/95
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

66

Revision Date: March 16, 1998

Egemin Naamloze Vennootschap

E'SPI III

(Mass Buoyancy Probe)

AUTOMATIC TANK GAUGING METHOD

Certification: Leak rate of 0.2 gph with PD = 97.9% and PFA = 1.1%.

Leak Threshold: 0.075 gph. A tank system should not be declared tight if the test result indicates a

loss or gain that equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel, solvents.

Tank Capacity: Maximum of 15,000 gallons. 

Tank must be between 50 and 95% full.

Waiting Time: Minimum of 7 hours between delivery and testing.

There must be no dispensing or delivery during waiting time.

Test Period: Minimum of 5 hours, 30 minutes.

Test data are acquired and recorded by a computer.

Leak rate is calculated from average of subsets of all collected data.

There must be no dispensing or delivery during test.

Temperature: Average for product is obtained by a single moving quartz crystal temperature sensor.

Water Sensor: Must be used to detect water ingress.

Minimum detectable water level in the tank is 0.253 inch.

Minimum detectable change in water level is 0.029 inch.

Calibration: Temperature sensor and probe must be checked and calibrated in accordance with 

manufacturer's instructions.

Comments: Not evaluated using manifold tank systems.

Tests only portion of tank containing product.

As product level is lowered, leak rate in a leaking tank decreases (due to lower head 

pressure). Consistent testing at low levels could allow a leak to remain undetected.

EPA leak detection regulations require testing of the portion of the tank system which 

routinely contains product.

Egemin Naamloze Vennootschap Evaluator: Midwest Research Institute

Bredabaan 1201 - 2900 Tel: (816) 753-7600

Schoten, Belgium Date of Evaluation: 12/21/90

Tel: 011-32-3-03/645 27 90
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

67

Revision Date: November 14, 1997

Egemin Naamloze Vennootschap

E'SPI IV

(Mass Buoyancy Probe)

AUTOMATIC TANK GAUGING METHOD

Certification: Leak rate of 0.2 gph with PD = 97.2% and PFA = 0.3%.

Leak Threshold: 0.1 gph. A tank system should not be declared tight if the test result indicates a loss 

or gain that equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel, fuel oil, solvents.

Tank Capacity: Maximum of 15,000 gallons.

Tank must be between 50 and 95% full.

Waiting Time: Minimum of 6 hours between delivery and testing.

There must be no dispensing or delivery during waiting time.

Test Period: Minimum of 2 hours, 15 minutes.

Test data are acquired and recorded by a computer.

Leak rate is calculated from average of subsets of all collected data.

There must be no dispensing or delivery during test.

Temperature: Average for product is determined by a minimum of 5 thermistors.

Water Sensor: Must be used to detect water ingress.

Minimum detectable water level in the tank is 0.253 inch.

Minimum detectable change in water level is 0.029 inch.

Calibration: Thermistors and probe must be checked and calibrated in accordance with 

manufacturer's instructions.

Comments: Not evaluated using manifold tank systems.

Tests only portion of tank containing product.

As product level is lowered, leak rate in a leaking tank decreases (due to lower head 

pressure). Consistent testing at low levels could allow a leak to remain undetected.

EPA leak detection regulations require testing of the portion of the tank system which 

routinely contains product.

Egemin Naamloze Vennootschap Evaluator: Midwest Research Institute

Bredabaan 1201 - 2900 Tel: (816) 753-7600

Schoten, Belgium

Tel: 011-32-3-03/645 2790 Date of Evaluation: 12/21/90
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

68

Revision Date: November 14, 1997

Emco Electronics, Tuthill Corp.

EECO System LLD (Q0011)

AUTOMATIC ELECTRONIC LINE LEAK DETECTOR

Certification: Leak rate of 3.0 gph with PD = 100% and PFA = 0%.

Leak Threshold: 2.0 gph. A pipeline system should not be declared tight if the test result indicates a 

loss that equals or exceeds this threshold.

Applicability: Gasoline, diesel, aviation fuel, fuel oil #4.

Specification: System tests pressurized fiberglass and steel pipelines.

Tests are conducted at operating pressure. 

Pipeline Capacity: Maximum of 67.4 gallons.

Waiting Time: None between delivery and testing.

None between dispensing and testing.

Test Period: Response time is 2 minutes.

Test data are acquired and recorded by a microprocessor.

Calculations are automatically performed by the microprocessor.

System Features: Permanent installation on pipeline.

Automatic testing of pipeline.

Preset threshold.

Single test to determine if pipeline is leaking.

Pump shutdown, message display, and alarm activation if leak is declared.

Calibration: System must be checked annually and calibrated if necessary in accordance with 

manufacturer's instructions.

Emco Electronics, Tuthill Corp. Evaluator: Ken Wilcox Associates

1210 Beach Dr. Tel: (816) 443-2494

Holland, MI 49423 Date of Evaluation: 12/31/93

Tel: (616) 335-3089
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

69

Revision Date: November 14, 1997

Emco Electronics, Tuthill Corp.

EECO System LLD (Q0011)

AUTOMATIC ELECTRONIC LINE LEAK DETECTOR

Certification: Leak rate of 0.2 gph with PD = 100% and PFA = 0%.

Leak Threshold: 0.1293 gph. A pipeline system should not be declared tight if the test result indicates 

a loss that equals or exceeds this threshold.

Applicability: Gasoline, diesel, aviation fuel, fuel oil #4. 

Specification: System tests pressurized fiberglass and steel pipelines.

Tests are conducted at operating pressure.

Pipeline Capacity: Maximum of 67.4 gallons.

Waiting Time: None between delivery and testing.

Ranges from 0 to 1 hour, 27 minutes between dispensing and testing.

Test Period: Minimum of 9 minutes.

Test data are acquired and recorded by a microprocessor.

Calculations are automatically performed by the microprocessor.

System Features: Permanent installation on pipeline.

Automatic testing of pipeline.

Preset threshold.

Single test to determine if pipeline is leaking.

Pump shutdown, message display, and alarm activation if leak is declared.

Calibration: System must be checked annually and calibrated if necessary in accordance with 

manufacturer's instructions.

Emco Electronics, Tuthill Corp. Evaluator: Ken Wilcox Associates, Inc.

1210 Beach Dr. Tel: (816) 443-2494

Holland, MI 49423 Date of Evaluation: 07/18/94

Tel: (616) 335-3089
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

70

Revision Date: November 14, 1997

Emco Electronics, Tuthill Corp.

EECO System LLD (Q0011)

AUTOMATIC ELECTRONIC LINE LEAK DETECTOR

Certification: Leak rate of 0.1 gph with PD = 100% and PFA = 0%

Leak Threshold: 0.0793 gph. A pipeline system should not be declared tight if the test result indicates 

a loss that equals or exceeds this threshold.

Applicability: Gasoline, diesel, aviation fuel, fuel oil #4. 

Specification: System tests pressurized fiberglass and steel pipelines.

Tests are conducted at operating pressure.

Pipeline Capacity: Maximum of 67.4 gallons.

Waiting Time: None between delivery and testing.

Ranges from 0 to 2 hours, 48 minutes between dispensing and testing.

Test Period: Minimum of 31 minutes.

Test data are acquired and recorded by a microprocessor.

Calculations are automatically performed by the microprocessor.

System Features: Permanent installation on pipeline.

Automatic testing of pipeline.

Preset threshold.

Single test to determine if pipeline is leaking.

Pump shutdown, message display, and alarm activation if leak is declared.

Calibration: System must be checked annually and calibrated if necessary in accordance with 

manufacturer's instructions.

Emco Electronics, Tuthill Corp. Evaluator: Ken Wilcox Associates

1210 Beach Dr. Tel: (816) 443-2494

Holland, MI 49423 Date of Evaluation: 12/31/93

Tel: (616) 335-3089
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

71

Revision Date: November 14, 1997

Emco Electronics, Tuthill Corp.

EECO System LLD

 (for Flexible Pipelines)

AUTOMATIC ELECTRONIC LINE LEAK DETECTOR

Certification: Leak rate of 3.0 gph with PD = 100% and PFA = 0%

Leak Threshold: 2.0 gph. A pipeline system should not be declared tight if the test result indicates a 

loss that equals or exceeds this threshold.

Applicability: Gasoline, diesel, aviation fuel, fuel oil #4. 

Specification: System tests flexible pipelines.

Tests are conducted at operating pressure.

Pipeline Capacity: Maximum of 49.6 gallons.

Waiting Time: None between delivery and testing.

None between dispensing and testing.

Test Period: Response time is 11 minutes, 24 seconds.

Test data are acquired and recorded by a microprocessor.

Calculations are automatically performed by the microprocessor.

System Features: Permanent installation on pipeline.

Automatic testing of pipeline.

Preset threshold.

Single test to determine if pipeline is leaking.

Pump shutdown, message display, and alarm activation if leak is declared.

Calibration: System must be checked annually and calibrated if necessary in accordance with 

manufacturer's instructions.

Emco Electronics, Tuthill Corp. Evaluator: Ken Wilcox Associates

1210 Beach Dr. Tel: (816) 443-2494

Holland, MI 49423 Date of Evaluation: 07/18/94

Tel: (616) 335-3089
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

72

Revision Date: November 14, 1997

Emco Electronics, Tuthill Corp.

EECO System LLD

 (for Flexible Pipelines)

AUTOMATIC ELECTRONIC LINE LEAK DETECTOR

Certification: Leak rate of 0.1 gph with PD = 100% and PFA = 0%

Leak Threshold: 0.0793 gph. A pipeline system should not be declared tight if the test result indicates 

a loss that equals or exceeds this threshold.

Applicability: Gasoline, diesel, aviation fuel, fuel oil #4. 

Specification: System tests flexible pipelines.

Tests are conducted at average pressure of 10 psi.

Pipeline Capacity: Maximum of 49.6 gallons.

Waiting Time: None between delivery and testing.

Minimum of 14 minutes between dispensing and testing.

Test Period: Minimum of 9 hours.

Test data are acquired and recorded by a microprocessor.

Calculations are automatically performed by the microprocessor.

System Features: Permanent installation on pipeline.

Automatic testing of pipeline.

Preset threshold.

Single test to determine if pipeline is leaking.

Pump shutdown, message display, and alarm activation if leak is declared.

Calibration: System must be checked annually and calibrated if necessary in accordance with 

manufacturer's instructions.

Emco Electronics, Tuthill Corp. Evaluator: Ken Wilcox Associates

1210 Beach Dr. Tel: (816) 443-2494

Holland, MI 49423 Date of Evaluation: 07/18/94

Tel: (616) 335-3089
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

73

Revision Date: September 11, 1998

Emco Electronics, Tuthill Corp.

EECO System TLM/0.2 gph Precision Test

(Q0400-4xx Magnetostrictive Probe)

AUTOMATIC TANK GAUGING METHOD

Certification: Leak rate of 0.2 gph with PD = 99.1% and PFA = 0.9%.

Leak Threshold: 0.1 gph. A tank system should not be declared tight if the test result indicates a loss 

or gain that equals or exceeds this threshold.

Applicability: Gasoline, diesel, aviation fuel, fuel oil #4. 

Other liquids maybe tested after consultation with the manufacturer.

Tank Capacity: Maximum of 15,000 gallons.

Tanks less than 95% full may be tested. 

Minimum product level required based on tank diameter as follows: 48" dia./min. 8.5"; 

64" dia./min. 10.5"; 72" dia./min. 11.5"; 96" dia./min. 14": 126" dia./min. 18".

For other diameters, see evaluation report.

Waiting Time: Between delivery and testing ranges from 1 to 6 hours depending on tank conditions.

None between dispensing and testing.

There must be no delivery during waiting time.

Test Period: Average of 2 hours, 46 minutes during evaluation.

Test data are acquired and recorded by a microprocessor which automatically 

determines test time based on tank size and product level.

There must be no dispensing or delivery during test.

Temperature: Probe contains 5 resistance temperature detectors (RTD's) to monitor product 

temperature. At least one RTD must be submerged in product during testing.

Water Sensor: Must be used to detect water ingress.

Minimum detectable water level in the tank is 0.66 inches.

Minimum detectable change in water level is 0.039 inches.

Calibration: RTDs and probe must be checked regularly and calibrated in accordance with 

manufacturer's instructions.

Comments: Not evaluated using manifolded tanks.

Tests only the portion of tank containing product.

As product level is lowered, leak rate in a leaking tank decreases (due to lower head 

pressure). Consistent testing at low levels could allow a leak to remain undetected.

EPA leak detection regulations require testing of the portion of the tank which routinely 

contains product.

Emco Electronics, Tuthill Corp. Evaluator: Ken Wilcox Associates

1210 Beach Dr. Tel: (816) 443-2494

Holland, MI 49423 Dates of Evaluation: 12/23/93, 07/23/97

Tel: (616) 335-3089
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

74
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

75

Revision Date: September 11, 1998

Emco Electronics, Tuthill Corp.

EECO System TLM/0.1 gph Precision Test

(Q0400-4xx Magnetostrictive Probe)

AUTOMATIC TANK GAUGING METHOD

Certification: Leak rate of 0.1 gph with PD = 99% and PFA = 1%.

Leak Threshold: 0.05 gph. A tank system should not be declared tight if the test result indicates a loss 

or gain which equals or exceeds this threshold.

Applicability: Gasoline, diesel, aviation fuel, fuel oil #4. 

Other liquids maybe tested after consultation with the manufacturer.

Tank Capacity: Maximum of 15,000 gallons.

Tanks less than 95% full may be tested. 

Minimum product level required based on tank diameter as follows: 48" dia./min. 8.5"; 

64" dia./min. 10.5"; 72" dia./min. 11.5"; 96" dia./min. 14"; 126" dia./min. 18".

For other diameters, see evaluation report.

Waiting Time: Minimum of 6 hours between delivery and testing.

None between dispensing and testing.

There must be no delivery during waiting time.

Test Period: Minimum of 3 hours, 45 minutes.

During the evaluation, test duration averaged 3 hours 45 minutes at 95% full and 5 

hours 58 minutes at 50% full.

Test data are acquired and recorded by a microprocessor which automatically 

determines test time based on tank size and product level.

There must be no dispensing or delivery during test.

Temperature: Probe contains 5 resistance temperature detectors (RTD's) to monitor product 

temperature. At least one RTD must be submerged in product during testing.

Water Sensor: Must be used to detect water ingress.

Minimum detectable water level in the tank is 0.66 inches.

Minimum detectable change in water level is 0.039 inches.

Calibration: RTDs and probe must be checked regularly and calibrated in accordance with 

manufacturer's instructions.

Comments: Not evaluated using manifolded tanks.

Tests only the portion of tank containing product.

As product level is lowered, leak rate in a leaking tank decreases (due to lower head 

pressure). Consistent testing at low levels could allow a leak to remain undetected.

EPA leak detection regulations require testing of the portion of the tank which routinely 

contains product.

Emco Electronics, Tuthill Corp. Evaluator: Midwest Research Institute

1210 Beach Dr. Tel: (816) 753-7600

Holland, MI 49423 Dates of Evaluation: 02/08/94, 09/19/97

Tel: (616) 335-3089
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

76
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

77

Revision Date: September 11, 1998

Emco Electronics, Tuthill Corp.

EECO System TLM/0.2 gph Quick Test

(Q0400-4xx Magnetostrictive Probe)

AUTOMATIC TANK GUAGING

Certification: Leak rate of 0.2 gph with PD = 95.4% and PFA = 4.6%.

Leak Threshold: 0.1 gph. A tank system should not be declared tight if the test result indicates a 

loss or gain that equals or exceeds this threshold.

Applicability: Gasoline, diesel, aviation fuel, fuel oil #4. 

Other liquids maybe tested after consultation with the manufacturer.

Tank Capacity: Maximum of 15,000 gallons.

Tanks less than 95% full may be tested. 

Minimum product level required based on tank diameters follows: 48" dia./min. 8.5";

64" dia./min. 10.5"; 72" dia./min. 11.5"; 96" dia./min. 14"; 126" dia./min. 18".

For other diameters, see evaluation report.

Waiting Time: Between delivery and testing ranges from 1 to 6 hours depending on tank conditions.

None between dispensing and testing.

There must be no delivery during waiting time.

Test Period: Average of 1 hour, 9 minutes during evaluation.

Test data are acquired and recorded by a microprocessor which automatically 

determines test time based on tank size and product level.

There must be no dispensing or delivery during test.

Temperature: Probe contains 5 resistance temperature detectors (RTD's) to monitor product 

temperature. At least one RTD must be submerged in product during testing.

Water Sensor: Must be used to detect water ingress.

Minimum detectable water level in the tank is 0.66 inches.

Minimum detectable change in water level is 0.039 inches.

Calibration: RTDs and probe must be checked regularly and calibrated in accordance with 

manufacturer's instructions.

Comments: Not evaluated using manifolded tanks.

Tests only the portion of tank containing product.

As product level is lowered, leak rate in a leaking tank decreases (due to lower head 

pressure). Consistent testing at low levels could allow a leak to remain undetected.

EPA leak detection regulations require testing of the portion of the tank which routinely 

contains product.

Emco Electronics, Tuthill Corp. Evaluator: Ken Wilcox Associates

1210 Beach Dr. Tel: (816) 443-2494

Holland, MI 49423 Date of Evaluation: 12/23/93, 07/23/97

Tel: (616) 335-3089
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

78
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

79

Revision Date: September 11, 1998

Emco Electronics, Tuthill Corp.

EECO System TLM/0.1 gph Quick Test

(Q0400-4xx Magnetostrictive Probe)

AUTOMATIC TANK GAUGING METHOD

Certification: Leak rate of 0.1 gph with PD = 96% and PFA = 4%.

Leak Threshold: 0.05 gph. A tank system should not be declared tight if the test result indicates a loss 

or gain which equals or exceeds this threshold.

Applicability: Gasoline, diesel, aviation fuel, fuel oil #4. 

Other liquids maybe tested after consultation with the manufacturer.

Tank Capacity: Maximum of 15,000 gallons.

Tanks less than 95% full may be tested. 

Minimum product level required based on tank diameter as follows : 48" dia./min. 8.5"; 

64" dia./min. 10.5"; 72" dia./min. 11.5"; 96" dia./min. 14"; 126" dia./ min. 18".

For other diameters, see evaluation report.

Waiting Time: Minimum of 6 hours between delivery and testing.

None between dispensing and testing.

There must be no delivery during waiting time.

Test Period: Minimum of 1 hour, 49 minutes.

During the evaluation, test duration averaged 1 hour 48 minutes at 95% full and 2 hours 

48 minutes at 50% full.

Test data are acquired and recorded by a microprocessor which automatically 

determines test time based on tank size and product level.

There must be no dispensing or delivery during test.

Temperature: Probe contains 5 resistance temperature detectors (RTD's) to monitor product 

temperature. At least one RTD must be submerged in product during testing.

Water Sensor: Must be used to detect water ingress.

Minimum detectable water level in the tank is 0.66 inches.

Minimum detectable change in water level is 0.039 inches.

Calibration: RTDs and probe must be checked regularly and calibrated in accordance with 

manufacturer's instructions.

Comments: Not evaluated using manifolded tanks.

Tests only the portion of tank containing product.

As product level is lowered, leak rate in a leaking tank decreases (due to lower head 

pressure). Consistent testing at low levels could allow a leak to remain undetected.

EPA leak detection regulations require testing of the portion of the tank which routinely 

contains product.

Emco Electronics, Tuthill Corp. Evaluator: Midwest Research Institute

1210 Beach Dr. Tel: (816) 753-7600

Holland, MI 49423 Dates of Evaluation: 02/08/94, 09/19/97

Tel: (616) 335-3089
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

80
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

81

Revision Date: November 14, 1997

Emco Electronics, Tuthill Corp.

EECO System, Leak Sensor II, Leak Sensor Jr.

Thermistor and Proximity probes

LIQUID-PHASE INTERSTITIAL DETECTOR

Detector:

Output type: qualitative

Sampling frequency: continuous

Operating principle: thermal conductivity, proximity switch

Test Results:

EECO System unleaded gasoline synthetic gasoline

Detection time (sec) <5 <5

Fall time manual reset manual reset

Lower detection limits (cm)

 Thermistor 1.22 1.12

 Proximity 0.97 1.04

Leak Sensor II

Detection time (sec) <5 <5

Fall time manual reset manual reset

Lower detection limits (cm)

 Thermistor 1.14 1.14

 Proximity 1.12 1.17

Leak Sensor Jr.

Detection time (sec) <5 <5

Fall time manual reset manual reset

Lower detection limits (cm)

 Thermistor 1.24 1.19

 Proximity 1.12 1.17

Specificity Results (in addition to above):

Activated: n-hexane, diesel fuel, jet-A fuel, toluene, xylene(s), water.

Comments:

Sensors are reusable. 

Systems alarm if either water or product leaks into interstitial space.

Emco Electronics, Tuthill Corp. Evaluator: Ken Wilcox Associates

1210 Beach Dr. Tel: (816) 443-2494

Holland, MI 49423 Date of Evaluation: 11/09/92

Tel: (616) 335-3089
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

82

Revision Date: August 23, 1999

Emco Electronics, Tuthill Corp.

EECO 2000, 3000, Leak Sensor II, Leak Sensor Jr. Systems

Q0001-005 Space Flood Sensor 

and

 EECO 1500, 2000, 3000 Systems

Q0003-005 Wet Interstitial Sensor

LIQUID-PHASE INTERSTITIAL DETECTOR

Detector:

Output type: qualitative

Sampling frequency: continuous

Operating principle: float switch

Test Results:

Q0001-005 Space Flood unleaded gasoline diesel fuel water

Sensor up down up down up down

Lower detection limit (cm) 31.06 5.49 30.78 5.36 30.35 5.03

Detection time (sec) <1 <1 <1 <1 <1 <1

Fall time (sec) <1 <1 <1 <1 <1 <1

Q0003-005 Wet Interstitial

Sensor

Lower detection limit (cm) 30.73 6.73 30.78 6.60 30.12 4.29

Detection time (sec) <1 <1 <1 <1 <1 <1

Fall time (sec) <1 <1 <1 <1 <1 <1

Specificity Results:

Evaluator claims sensors will respond to any liquid.

Manufacturer’s Specifications:

Temperature range: -13 to 158F (-25 to 70C).

Interstitial liquid level should be adjusted to center of sensor.

Comments:

Primary use is interstitial or annular space of a double-walled tank partially filled with brine solution.

Activates alarm if any significant gain or loss of solution occurs. 

Sensors are reusable. 

Emco Electronics, Tuthill Corp. Evaluator: Ken Wilcox Associates

1210 Beach Dr. Tel: (816) 443-2494

Holland, MI 49423 Date of Evaluation: 10/18/96

Tel: (616) 335-3089
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

83

Revision Date: August 23, 1999

Emco Electronics, Tuthill Corp.

EECO 1500, 2000, 3000 Systems

Q0003-001 Discriminating Dispenser Pan Sensor, Q0003-002 Discriminating STP Sump Sensor,

Q0003-003 Discriminating Interstitial Sensor, Q0003-006 Liquid Only Interstitial Sensor,

Q0003-009 Liquid Float Sensor

LIQUID-PHASE INTERSTITIAL DETECTOR

Detector:

Output type: qualitative

Sampling frequency: continuous

Operating principle: not specified

Test Results:

Q0003-001 Discriminating unleaded gasoline diesel fuel water

Dispenser Pan Sensor low high low high low high

Lower detection limit (cm) 3.38 19.91 3.30 19.86 3.20 19.66

Detection time (sec) 1-24hr 1-24hr <1 <1 <1 <1

Fall time (sec) clean clean clean clean <1 <1

Q0003-002 Discriminating 

STP Sump Sensor

Lower detection limit (cm) 3.12 28.37 3.07 28.24 3.00 28.04

Detection time (sec) 1-24hr 1-24hr <1 <1 <1 <1

Fall time (sec) clean clean clean clean <1 <1

Q0003-003 Discriminating 

Interstitial Sensor

Lower detection limit (cm) 1.68 1.68 1.85

Detection time (hr) <1 <1 <1

Fall time (sec) <1 <1 <1

Q0003-006 Liquid Only 

Interstitial Sensor

Lower detection limit (cm) 1.35 1.55 1.78

Detection time (hr) <1 <1 <1

Fall time (sec) <1 <1 <1

Q0003-009 Liquid Float 

Sensor

Lower detection limit (cm) 2.54 2.49 2.21

Detection time (hr) <1 <1 <1

Fall time (sec) <1 <1 <1

Specificity Results:

Evaluator claims sensors will respond to any liquid.

Comments:

Q0003-001 and Q0003-002 sensors must be cleaned after exposure to product.

Sensors are reusable.

Emco Electronics, Tuthill Corp. Evaluator: Ken Wilcox Associates

1210 Beach Dr. Tel: (816) 443-2494

Holland, MI 49423 Date of Evaluation: 10/18/96

Tel: (616) 335-3089
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

84

Revision Date: August 23, 1999

Emco Electronics, Tuthill Corp.

EECO 1500, 2000, 3000, Leak Sensor, Leak Sensor II, Leak Sensor Jr.

(Q0002-001, 005 Sensors)

VAPOR-PHASE OUT-OF-TANK PRODUCT DETECTOR

Detector:

Output type: qualitative

Sampling frequency: continuous

Operating principle: adsistor (Q0002-001 sensor),

metal oxide semiconductor (Q0002-005 sensor)

Test Results:

Q0002-001 Sensor unleaded gasoline synthetic gasoline JP-4 jet fuel

Accuracy* (%) 100 0 100

Detection time* (min:sec) 19:32 N/R** 09:16

Fall time* (hh:mm:ss) 00:32:30 N/A** >01:05:33

Lower detection limit (ppm) 1000 >1000 500

Q0002-005 Sensor

Accuracy* (%) 100 100 100

Detection time* (min:sec) 00:30 00:28 01:01

Fall time* (min:sec) 03:34 02:40 05:33

Lower detection limit (ppm) 100 100 100

 

*For tests conducted with 1000 ppm of test gas.

** See Glossary

Specificity Results (in addition to above):

Activated: n-hexane, toluene, xylene(s).

Emco Electronics, Tuthill Corp. Evaluator: Carnegie Mellon Research Institute

1210 Beach Dr. Tel: (412) 268-3495

Holland, MI 49423 Date of Evaluation: 11/12/96, 10/18/96

Tel: (616) 335-3089
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

85

Revision Date: November 14, 1997

Engineered Systems, Inc.

Image II

(Magnetostrictive Probe)

AUTOMATIC TANK GAUGING METHOD

Certification: Leak rate of 0.2 gph with PD = 96.6% and PFA = 3.4%.

Leak Threshold: 0.1 gph. A tank system should not be declared tight if the test result indicates a loss 

or gain that equals or exceeds this threshold.

Applicability: Gasoline, diesel, aviation fuel, solvents.

Tank Capacity: Maximum of 15,000 gallons.

Tank must be minimum 90% full.

Waiting Time: Minimum of 8 hours between delivery and testing.

There must be no dispensing or delivery during waiting time.

Test Period: Minimum of 6 hours.

Test data are acquired and recorded by a computer.

Leak rate is calculated from average of subsets of all collected data.

There must be no dispensing or delivery during test.

Temperature: Average for product is determined by a minimum of 5 resistance temperature

detectors (RTDs).

Water Sensor: Must be used to detect water ingress.

Minimum detectable water level in the tank is 0.83 inch.

Minimum detectable water level change is 0.0116 inch.

Calibration: RTDs and probe must be checked and calibrated in accordance with manufacturer's 

instructions.

Comments: Not evaluated using manifold tank systems.

Tests only portion of tank containing product.

As product level is lowered, leak rate in a leaking tank decreases (due to lower head 

pressure). Consistent testing at low levels could allow a leak to remain undetected.

EPA leak detection regulations require testing of the portion of the tank system which 

routinely contains product.

Engineered Systems Inc. Evaluator: Ken Wilcox Associates, Inc.

2001 W. Campus Dr. Tel: (816) 443-2494

Tempe, AZ 85282 Date of Evaluation: 08/20/93

Tel: (602) 438-1362
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

86

Revision Date: September 11, 1998

Entropy Limited

Precision Tank Inventory Control System Version 90

STATISTICAL INVENTORY RECONCILIATION TEST METHOD (QUALITATIVE)

Certification: Leak rate of 0.1 gph with PD = 97.9% and PFA = 0%.

Leak Threshold: 0.04 gph. A tank system should not be declared tight if the test result indicates a 

loss or gain that equals or exceeds this threshold.

Applicability: Gasoline, diesel, aviation fuel, fuel oil #4.

Tank Capacity: Maximum of 15,000 gallons.

Data Requirement: Minimum of 64 days of product level and flow through data.

Comments: Not evaluated using data from manifold tank systems.

Of 120 data sets submitted for evaluation, 13 were not evaluated and 16 were 

inconclusive.

Median monthly throughput of tanks evaluated was 42,835 gallons.

Data sets evaluated were supplied by evaluator.

Entropy Limited Evaluator: Midwest Research Institute

S. Great Rd. Tel: (816) 753-7600

Lincoln, MA 01773 Date of Evaluation: 04/02/91

Tel: (617) 259-8901
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

87

Revision Date: November 14, 1997

Entropy Limited

Precision Tank Inventory Control System, Revision 90

STATISTICAL INVENTORY RECONCILIATION TEST METHOD (QUANTITATIVE)

Certification: Leak rate of 0.1 gph with PD = 99.5% and PFA < 0.5%.

Leak Threshold: 0.05 gph. A tank system should not be declared tight if the test result indicates a 

loss or gain that equals or exceeds this threshold.

Applicability: Gasoline, diesel, aviation fuel, fuel oil #4.

Tank Capacity: Maximum of 22,500 gallons for single tanks.

Maximum of 60,000 gallons cumulative volume for manifolded tank systems with no 

more than 3 tanks in system.

Data Requirement: Minimum of 30 days of product level and flow through data.

Comments: 32% of data sets evaluated were from manifold tank systems. 

Of 56 data sets submitted for evaluation, 6 were not analyzed due to unusable data 

and none were inconclusive.

Median monthly throughput of tanks evaluated was 52,207 gallons.

Leak rates ranging from 0.0497 to 0.203 gph were used in evaluation.

Data sets evaluated were supplied by evaluator.

Entropy Limited Evaluator: Simpson, Gumpertz and Heger, Inc.

S. Great Rd. Tel: (617) 643-2000

Lincoln, MA 01773 Date of Evaluation: 11/30/93

Tel: (617) 259-8901
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

88

Revision Date: December 4, 1997

Environment and Safety

EASI Level-Tru

(Magnetostrictive Probe)

AUTOMATIC TANK GAUGING METHOD

Certification: Leak rate of 0.2 gph with PD = 95.4% and PFA = 4.6%.

Leak Threshold: 0.1 gph. A tank system should not be declared tight if the test result indicates a loss 

or gain that equals or exceeds this threshold.

Applicability: Gasoline, diesel, aviation fuel, fuel oil #4, antifreeze, brake fluid, transmission fluid, 

solvents.

Tank Capacity: Maximum of 15,000 gallons.

Tank must be between 50 and 95% full.

Waiting Time: Minimum of 4 hours, 6 minutes between delivery and testing.

There must be no dispensing or delivery during waiting time.

Test Period: Minimum of 3 hours, 36 minutes.

Test data are acquired and recorded by a computer.

Leak rate is calculated from data collected over the entire range of test period.

There must be no dispensing or delivery during test.

Temperature: Average for product is determined by a minimum of 5 resistance temperature 

detectors (RTDs).

Water Sensor: Must be used to detect water ingress.

Minimum detectable water level in the tank is 0.896 inch.

Minimum detectable change in water level is 0.023 inch.

Calibration: RTDs and probe must be checked and calibrated in accordance with manufacturer's 

instructions.

Comments: Not evaluated using manifold tank systems.

Tests only portion of tank containing product.

As product level is lowered, leak rate in a leaking tank decreases (due to lower head 

pressure). Consistent testing at low levels could allow a leak to remain undetected.

EPA leak detection regulations require testing of the portion of the tank system which 

routinely contains product.

Environment and Safety, Inc. Evaluator: Midwest Research Institute

252 Welsh Pool Rd. Tel: (816) 753-7600

Exton, PA 19341-1313 Date of Evaluation: 04/11/91

Tel: Unavailable
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

89

Revision Date: April 18, 1997

Environmental Fuel Systems, Inc.

Fuel Finder Version IV

VAPOR-PHASE OUT-OF-TANK PRODUCT DETECTOR

Detector:

Output type: quantitative

Sampling frequency: intermittent

Operating principle: adsorption sampling

Test Results:

benzene 2-methylbutane

Accuracy (%) [Avg. Reading] 106.8 [1647 ppm] 122.7 [1380 ppm]

Bias (%) 64.5 38.2

Precision (%) 22.3 53.2

Detection time N/A* N/A

Fall time N/A N/A

Lower detection limit (ppm) 77 116

* See glossary.

Specificity Results:

percentages

Benzene 147.7

n-butane 90.7

n-hexane 55.7

Isobutane 51.1

2-methylpentane 143.7

Toluene 66.5

Environmental Fuel Systems, Inc. Evaluator: Carnegie Mellon Research Institute

P.O. Box 1899 Tel: (412) 268-3495

Bandera, TX 78003 Date of Evaluation: 04/20/93

Tel: (800) 375-7747 
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

90

Revision Date: August 23, 1999

EnviroSIR LLC

EnviroSIR Version 1.0

STATISTICAL INVENTORY RECONCILIATION TEST METHOD (QUANTITATIVE)

Certification: Leak rate of 0.2 gph with PD = 99.9% and PFA = 0.1% for threshold of 0.1 gph.

Leak rate of 0.2 gph with PD = 97.4% and PFA = 0.1% for threshold of 0.15 gph.

Leak rate of 0.1 gph with PD = 97.4% and PFA = 2.6%

Leak Threshold: 0.1 and 0.15 for leak rate of 0.2 gph (user selectable). 

0.05 for leak rate of 0.1 gph. 

A tank system should not be declared tight if the test result indicates a loss or 

gain that equals or exceeds this threshold.

Applicability: Gasoline, diesel, kerosene.

Tank Capacity: Maximum of 45,000 gallons for single tanks.

Maximum of 45,000 gallons cumulative capacity for manifold tank systems with 

no more than 4 tanks in the system. 

Data Requirement: Minimum of 28 days of usable product level and flow through data.

System Features: Method of data analysis that system employs, and was used during evaluation 

process, is exclusive of any external control by vendor.

System consists of a fully automated software package with embedded 

algorithms for conducting leak detection testing. Consequently, third party 

evaluation procedure demonstrated that system can be used in-house with no 

requirement for direct vendor participation, except in certain rare cases when 

system generates a flag that requires a vendor trained and certified specialist to 

analyze data and make the final decision.

System incorporates context-sensitive "Help" information.

Evaluation Features: Evaluator tested this system for in-house use. Computer program disk along 

with instructional documentation was supplied by vendor to evaluator. Evaluator, 

without vendor involvement, analyzed required data and performed evaluation 

using program disk and accompanying documentation. Vendor was not present 

during evaluation.

Comments: 53% of data sets evaluated were from manifold tank systems.

Of 43 data sets submitted for evaluation, all were analyzed with conclusive 

results.

Median monthly throughput for tanks evaluated was 18,897 gallons.

Leak rates of 0.05, 0.10, and 0.20 gph were used in evaluation.

Data sets evaluated were supplied by evaluator.

EnviroSIR LLC Evaluator: Ken Wilcox Associates, Inc.

1003 East Saint Mary Blvd. Tel: (816) 443-2494

P.O. Box 52565 Date of Evaluation: 10/20/98

Lafayette, LA 70505
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

91

Tel: (318) 233-2383
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

92

Revision Date: November 14, 1997

FCI Environmental, Inc.

Analog Hydrocarbon Probe AHP-100, Digital Hydrocarbon Probe DHP-100

LIQUID-PHASE OUT-OF-TANK PRODUCT DETECTOR

Detector:

Output type: qualitative

Sampling frequency: continuous

Operating principle: fiber optic chemical sensor

Test Results:

unleaded gasoline synthetic gasoline

Detection time (min) <8 <8

Fall time (min) <5 <5

Lower detection limit (cm) <0.01 <0.01

Specificity Results (in addition to above):

Activated: n-hexane, diesel fuel, jet-A fuel, toluene, xylene(s).

Comments:

Sensors are reusable.

FCI Environmental, Inc. Evaluator: Ken Wilcox Associates

1181 Grier Dr., Bldg. B Tel: (816) 443-2494

Las Vegas, NV 89119 Date of Evaluation: 01/15/94

Tel: (800) 510-3627
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

93

Revision Date: August 23, 1999

FCI Environmental, Inc.

Analog Hydrocarbon Probe AHP-100, Digital Hydrocarbon Probe DHP-100

VAPOR-PHASE OUT-OF-TANK PRODUCT DETECTOR

Detector:

Output type: quantitative

Sampling frequency: continuous

Operating principle: fiber optic

Test Results (for tests conducted with 1000 ppm test gas):

AHP-100

unleaded

gasoline

synthetic 

gasoline xylene benzene 2-methylbutane

Relative accuracy* (%) 12 22 2 35 N/R*

Bias (%) -7 -2 1 -23 N/R

Precision (%) 4 15 1 11 N/R

Detection time (min) <1 <1 <1 <1 N/R

Fall time (min) <1 <1 <1 <1 N/R

Lower Detection Limit (ppm) 137 220 84 519 N/R

DHP-100

Relative accuracy* (%) 18 29 0 17 N/R

Bias (%) 1 -12 0 -9 N/R

Precision (%) 9 10 0 11 N/R

Detection time (min) <1 <1 <1 <1 N/R

Fall time (min) <1 <1 <1 <1 N/R

Lower Detection Limit (ppm) 73 118 45 280 N/R

* See glossary.

Test Results (for tests conducted with 10 ppm test gas):

AHP-100

unleaded

gasoline

synthetic 

gasoline

diesel 

fuel

JP-4

jet fuel

JP-8

jet fuel p-xylene

Kerosene

Lower Detection 

Limit (ppm) 9.25 13.26 5.79 5.26 10.89 12.94 14.65

Specificity Results (%) (corrected for sensitivity differences):

AHP-100 DHP-100 AHP-100 DHP-100

unleaded gasoline 93 101 xylene 103 N/R

synthetic gasoline** 100 92 toluene 96 97

synthetic gasoline*** 98 88 pentane N/R N/R

JP-4 jet fuel 105 109 methane N/R N/R

benzene 76 89 butane N/R N/R

trimethylbenzene 107 104 2-methylbutane N/R N/R

p-xylene 101 100 n-hexane N/R 108

** EPA March 1990 protocol

*** Radian June 1990 protocol

FCI Environmental, Inc. Evaluator: Ken Wilcox Associates

1181 Grier Dr., Bldg. B Tel: (816) 443-2494

Las Vegas, NV 89119 Dates of Evaluation: 03/07/94, 12/05/94

Tel: (800) 510-3627 
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

94

Revision Date: April 18, 1997

FDR Services, Inc.

GasPak Vapor Monitoring System

VAPOR-PHASE OUT-OF-TANK PRODUCT DETECTOR

Detector:

Output type: quantitative

Sampling frequency: intermittent

Operating principle: product permeable detector

Test Results (averages of multiple concentrations):

benzene

heptane,

3-methyl hexane Iso-octane

Accuracy (%) 103 102 107 103

Bias (%) -1 1 2 1

Precision (%) 2 2 4 2

Lower detection limit (ppm) 1 1 1 1

Specificity (%) 100 100 102 101

pentane,

2,4-dimethyl

pentane,

2,3,4-trimethyl toluene m-xylene

Accuracy (%) 105 104 104 99

Bias (%) 1 1 1 -6

Precision (%) 3 3 3 4

Lower detection limit (ppm) 3 1 1 4

Specificity (%) 101 100 100 94

Specificity Results:

See results above.

Comments:

Detection times were not directly measured. However, evaluator states, “experiential evidence predicts 

that the detector response will reach ‘alarm’ conditions (30% of maximum fresh fuel response) at a 

distance of 5 meters in slightly over one day.” 

Each cartridge is used once, then replaced by another. 

GasPak is produced and analyzed by Fayette Environmental Services, Inc., with exclusive marketing 

and implementation rights assigned to FDR Services, Inc.

FDR Services, Inc. Evaluator: David G. Bray, Ph.D.

219 North Main St., Suite 202 University of Missouri - Columbia

Bryan, TX 77803 Tel: (573) 882-2439

Tel: (800) 337-5325 Date of Evaluation: 07/27/94
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

95

Revision Date: November 14, 1997

FE Petro, Inc.

STP-MLD Pipeline Leak Detector

AUTOMATIC MECHANICAL LINE LEAK DETECTOR

Certification: Leak rate of 3.0 gph with PD = 100% and PFA = 0%.

Leak Threshold: 2.0 gph. A pipeline system should not be declared tight if the test result indicates a 

loss that equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel, fuel oil #4, some solvents.

Specification: System tests fiberglass and steel pipelines.

Tests are conducted at operating pressure.

Pipeline Capacity: Maximum of 129.14 gallons.

Waiting Time: None between delivery and testing. 

None between dispensing and testing.

Test Period: Response time is less than 30 seconds.

System Features: Permanent installation on pipeline.

Automatic testing of pipeline.

Preset threshold.

Single test to determine if pipeline is leaking.

Restricted flow to dispenser if leak is declared.

Calibration: System must be checked annually and calibrated if necessary in accordance with 

manufacturer’s instructions.

FE Petro, Inc. Evaluator: Ken Wilcox Associates, Inc.

P.O. Box 139 Tel: (816) 443-2494

McFarland, WI 53558 Date of Evaluation: 07/01/92

Tel: (608) 838-8786
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

96

Revision Date: November 14, 1997

FE Petro, Inc.

STP-MLD-D Pipeline Leak Detector

AUTOMATIC MECHANICAL LINE LEAK DETECTOR

Certification: Leak rate of 3.0 gph with PD = 100% and PFA = 0%.

Leak Threshold: 2.0 gph. A pipeline system should not be declared tight if the test result indicates a 

loss that equals or exceeds this threshold. 

Applicability: Diesel

Specification: System tests steel and fiberglass pipelines.

Tests are conducted at operating pressure.

Pipeline Capacity: Maximum for rigid system is 341 gallons.

Waiting Time: None between delivery and testing. 

None between dispensing and testing.

Test Period: Average response time is 1 minute.

System Features: Permanent installation on pipeline.

Automatic testing of pipeline.

Preset threshold.

Single test to determine if pipeline is leaking.

Restricted flow to dispenser if leak is declared.

Calibration: System must be checked annually and calibrated if necessary in accordance with 

manufacturer’s instructions.

FE Petro, Inc. Evaluator: Ken Wilcox Associates, Inc.

P.O. Box 139 Tel: (816) 443-2494

McFarland, WI 53558 Date of Evaluation: 04/30/94

Tel: (608) 838-8786
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

97

Revision Date: November 14, 1997

FE Petro, Inc.

STP-MLD-E Line (Flexline) Leak Detector 

(for Flexible Pipelines)

AUTOMATIC MECHANICAL LINE LEAK DETECTOR

Certification: Leak rate of 3.0 gph with PD = 100% and PFA = 0%.

Leak Threshold: 2.0 gph. A pipeline system should not be declared tight if the test result indicates a 

loss that equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel, some solvents.

Specification: System tests flexible pipelines.

Tests are conducted at operating pressure.

Pipeline Capacity: Maximum of 49.6 gallons.

Waiting Time: None between delivery and testing. 

None between dispensing and testing.

Test Period: Average response time is 3 minutes.

System Features: Permanent installation on pipeline.

Automatic testing of pipeline.

Preset threshold.

Single test to determine if pipeline is leaking.

Restricted flow to dispenser if leak is declared.

Calibration: System must be checked annually and calibrated if necessary in accordance with 

manufacturer’s instructions.

Comments: Enviroflex line with a bulk modulus* of 1,280 was used during evaluation.

*See glossary.

FE Petro, Inc. Evaluator: Ken Wilcox Associates, Inc.

P.O. Box 139 Tel: (816) 443-2494

McFarland, WI 53558 Date of Evaluation: 03/24/94

Tel: (608) 838-8786
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

98

Revision Date: November 14, 1997

Gasboy International (formerly William M. Wilson's Sons)

Gasboy TMS 500

(Magnetostrictive Probe)

AUTOMATIC TANK GAUGING METHOD

Certification: Leak rate of 0.2 gph with PD = 99.1% and PFA = 0.09%.

Leak Threshold: 0.1 gph. A tank system should not be declared tight if the test result indicates a loss 

or gain that equals or exceeds this threshold.

Applicability: Gasoline, diesel, aviation fuel, solvents.

Tank Capacity: Maximum of 15,000 gallons.

Tank must be between 50 and 95% full.

Waiting Time: Minimum of 6 hours between delivery and testing.

There must be no dispensing or delivery during waiting time.

Test Period: Minimum of 3 hours.

Test data are acquired and recorded by a computer.

Leak rate is calculated from data determined to be valid by statistical analysis.

There must be no dispensing or delivery during test.

Temperature: Average for product is determined by a minimum of 5 resistance sensors.

Water Sensor: Must be used to detect water ingress.

Minimum detectable water level in the tank is 1.04 inch.

Minimum detectable change in water level is 0.011 inch.

Calibration: Temperature sensors and probe must be checked and calibrated in accordance with 

manufacturer's instructions.

Comments: Not evaluated using manifold tank systems.

Tests only portion of tank containing product.

As product level is lowered, leak rate in a leaking tank decreases (due to lower head 

pressure). Consistent testing at low levels could allow a leak to remain undetected.

EPA leak detection regulations require testing of the portion of the tank system which 

routinely contains product.

System is no longer being manufactured although product support is still available.

Gasboy International Evaluator: Ken Wilcox Associates, Inc.

P.O. Box 309 Tel: (816) 443-2494

Lansdale, PA 19446 Date of Evaluation: 05/10/91

Tel: (215) 855-4631
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

99

Revision Date: November 14, 1997

Gems Sensors Inc. (formerly IMO Industries Inc.)

Gems Smartwell Portable Monitor Model WPM-535

with Groundwater Probe Model WP-535

LIQUID-PHASE OUT-OF-TANK PRODUCT DETECTOR

Detector:

Output type: qualitative

Sampling frequency: intermittent

Operating principle: conductive polymer

Test Results:

unleaded gasoline synthetic gasoline

Detection time (min:sec) 09:31 07:05

Fall time (min:sec) 55:42 17:04

Lower detection limit (cm) 0.04 0.08

Specificity Results (in addition to above):

Activated: n-hexane, diesel fuel, jet-A fuel, toluene, xylene(s).

Comments:

Sampling frequency is designated as "intermittent" because polymer strip is permanently mounted in 

monitoring well, while monitor is a hand held unit which is periodically connected to sensor.

Sensors are reusable.

Gems Sensors Inc. Evaluator: Carnegie Mellon Research Institute

Cowles Rd. Tel: (412) 268-3495

Plainville, CT 06062-1198 Date of Evaluation: 04/22/93

Tel: (203) 747-3000
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

100

Revision Date: September 11, 1998

Gilbarco Environmental Products

Environmental Management Console (EMC)

with Line Leak Detector, Series PA02630000501

AUTOMATIC ELECTRONIC LINE LEAK DETECTOR

Certification: Leak rate of 3.0 gph with PD = 100% and PFA = 0%. 

Leak Threshold: 1.5 gph. A pipeline system should not be declared tight if the test result indicates a 

loss that equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel, solvents.

Specification: System tests pressurized fiberglass and steel pipelines.

Tests are conducted at operating pressure.

System will not function with a mechanical line leak detector installed in the 

pipeline.

Pipeline Capacity: Maximum of 158 gallons.

Waiting Time: None between delivery and testing. 

Minimum between dispensing and testing depends on volume of product and 

temperature gradient which is determined by the system's computer.

Test Period: Response time is 14 seconds.

Test data are acquired and recorded by a microprocessor.

Calculations are automatically performed by the microprocessor.

System Features: Permanent installation on pipeline.

Automatic testing of pipeline.

Preset threshold.

Single test to determine if pipeline is leaking.

Pump shutdown, message display, and alarm activation if a leak is declared.

Calibration: System must be checked annually and calibrated if necessary in accordance with 

manufacturer's instructions.

Gilbarco Environmental Products Evaluator: Midwest Research Institute

7300 W. Friendly Ave. Tel: (816) 753-7600

Greensboro, NC 27420 Date of Evaluation: 09/20/91

Tel: (910) 547-5000 Evaluator: Ken Wilcox Associates, Inc.

Tel: (816) 443-2494

Date of Revised Evaluation: 04/12/93
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

101

Revision Date: September 11, 1998

Gilbarco Environmental Products

Environmental Management Console (EMC)

with Line Leak Detector, Series PA02630000501

AUTOMATIC ELECTRONIC LINE LEAK DETECTOR

Certification: Leak rate of 0.2 gph with PD = 100% and PFA = 0%. 

Leak Threshold: 0.1 gph. A pipeline system should not be declared tight if the test result indicates 

a loss that equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel, solvents.

Specification: System tests pressurized fiberglass and steel pipelines.

Tests are conducted at operating pressure.

System will not function with a mechanical line leak detector installed in the 

pipeline.

Pipeline Capacity: Maximum of 158 gallons.

Waiting Time: None between delivery and testing.

Minimum between dispensing and testing depends on volume of product and 

temperature gradient which is determined by the system's computer.

Test Period: Response time is 6 minutes.

Test data are acquired and recorded by a microprocessor.

Calculations are automatically performed by the microprocessor.

System Features: Permanent installation on pipeline.

Automatic testing of pipeline.

Preset threshold.

Single test to determine if pipeline is leaking.

Pump shutdown, message display, and alarm activation if leak is declared.

Calibration: System must be checked annually and calibrated if necessary in accordance with 

manufacturer's instructions.

Gilbarco Environmental Products Evaluator: Midwest Research Institute

7300 W. Friendly Ave. Tel: (816) 753-7600

Greensboro, NC 27410 Date of Evaluation: 09/20/91

Tel: (336) 547-5000 Evaluator: Ken Wilcox Associates, Inc.

Tel: (816) 443-2494

Date of Revised Evaluation: 04/12/93
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

102

Revision Date: September 11, 1998

Gilbarco Environmental Products

Environmental Management Console (EMC)

with Line Leak Detector, Series PA02630000501

AUTOMATIC ELECTRONIC LINE LEAK DETECTOR

Certification: Leak rate of 0.1 gph with PD = 100.0% and PFA = 0%.

Leak Threshold: 0.079 gph. A pipeline system should not be declared tight if the test result indicates 

a loss that equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel, solvents.

Specification: System tests pressurized fiberglass and steel pipelines.

Tests are conducted at operating pressure.

System will not function with a mechanical line leak detector installed in the 

pipeline.

Pipeline Capacity: Maximum of 158 gallons.

Waiting Time: None between delivery and testing.

Minimum between dispensing and testing depends on volume of product and 

temperature gradient which is determined by the system's computer.

Test Period: Response time is 14 minutes.

Test data are acquired and recorded by a microprocessor.

Calculations are automatically performed by the microprocessor.

System Features: Permanent installation on pipeline.

Automatic testing of pipeline.

Preset threshold.

Single test to determine if pipeline is leaking.

Pump shutdown, message display, and alarm activation if leak is declared.

Calibration: System must be checked annually and calibrated if necessary in accordance with 

manufacturer's instructions.

Gilbarco Environmental Products Evaluator: Midwest Research Institute

7300 W. Friendly Ave. Tel: (816) 753-7600

Greensboro, NC 27410 Date of Evaluation: 09/20/91

Tel: (336) 547-5000 Evaluator: Ken Wilcox Associates, Inc.

Tel: (816) 443-2494

Date of Revised Evaluation: 04/12/93
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

103

Revision Date: September 11, 1998

Gilbarco Environmental Products

Environmental Management Console (EMC)

with Line Leak Detector, Series PA02630000501

(for Flexible Pipelines)

AUTOMATIC ELECTRONIC LINE LEAK DETECTOR

Certification: Leak rate of 3.0 gph with PD = 100% and PFA = 0%. 

Leak Threshold: 1.5 gph. A pipeline system should not be declared tight if the test result indicates a 

loss that equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel, solvents.

Specification: System tests pressurized flexible pipelines.

Tests are conducted at operating pressure.

System will not function with a mechanical line leak detector installed in the 

pipeline.

Pipeline Capacity: Maximum of 49.6 gallons.

Waiting Time: None between delivery and testing.

Minimum between dispensing and testing depends on volume of product and 

temperature gradient which is determined by the system's computer.

Test Period: Response time is 1 minute.

Test data are acquired and recorded by a microprocessor.

Calculations are automatically performed by the microprocessor.

System Features: Permanent installation on pipeline.

Automatic testing of pipeline.

Preset threshold.

Single test to determine if pipeline is leaking.

Pump shutdown, message display, and alarm activation if leak is declared.

Calibration: System must be checked annually and calibrated if necessary in accordance with 

manufacturer's instructions.

Gilbarco Environmental Products Evaluator: Ken Wilcox Associates, Inc.

7300 W. Friendly Ave. Tel: (816) 443-2494

Greensboro, NC 27410 Date of Evaluation: 08/04/93

Tel: (336) 547-5000
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

104

Revision Date: September 11, 1998

Gilbarco Environmental Products

Environmental Management Console (EMC)

with Line Leak Detector, Series PA02630000501

(for Flexible Pipelines)

AUTOMATIC ELECTRONIC LINE LEAK DETECTOR

Certification: Leak rate of 0.2 gph with PD = 96% and PFA = 4%. 

Leak Threshold: 0.1 gph. A pipeline system should not be declared tight if the test result indicates 

a loss that equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel, solvents.

Specification: System tests pressurized flexible pipelines.

Tests are conducted at operating pressure.

System will not function with a mechanical line leak detector installed in the 

pipeline.

Pipeline Capacity: Maximum of 49.6 gallons.

Waiting Time: None between delivery and testing.

Minimum between dispensing and testing depends on volume of product and 

temperature gradient which is determined by the system's computer.

Test Period: Response time is 45 minutes to 8 hours, 51 minutes.

Test data are acquired and recorded by a microprocessor.

Calculations are automatically performed by the microprocessor.

System Features: Permanent installation on pipeline.

Automatic testing of pipeline.

Preset threshold.

Single test to determine if pipeline is leaking.

Pump shutdown, message display, and alarm activation if leak is declared.

Calibration: System must be checked annually and calibrated if necessary in accordance with 

manufacturer's instructions.

Gilbarco Environmental Products Evaluator: Ken Wilcox Associates, Inc.

7300 W. Friendly Ave. Tel: (816) 443-2494

Greensboro, NC 27410 Date of Evaluation: 08/04/93

Tel: (336) 547-5000
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

105

Revision Date: September 11, 1998

Gilbarco Environmental Products

Environmental Management Console (EMC)

with Line Leak Detector, Series PA02630000501

(for Flexible Pipelines)

AUTOMATIC ELECTRONIC LINE LEAK DETECTOR

Certification: Leak rate of 0.1 gph with PD = 100% and PFA = 0%. 

Leak Threshold: 0.079 gph. A pipeline system should not be declared tight if the test result indicates 

a loss that equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel, solvents.

Specification: System tests pressurized flexible pipelines.

Tests are conducted at operating pressure.

System will not function with a mechanical line leak detector installed in the 

pipeline.

Pipeline Capacity: Maximum of 49.6 gallons.

Waiting Time: None between delivery and testing.

Minimum between dispensing and testing depends on volume of product and 

temperature gradient which is determined by the system's computer.

Test Period: Response time is 1 hour, 12 minutes to 12 hours, 54 minutes.

Test data are acquired and recorded by a microprocessor.

Calculations are automatically performed by the microprocessor.

System Features: Permanent installation on pipeline.

Automatic testing of pipeline.

Preset threshold.

Single test to determine if pipeline is leaking.

Pump shutdown, message display, and alarm activation if leak is declared.

Calibration: System must be checked annually and calibrated if necessary in accordance with 

manufacturer's instructions.

Gilbarco Environmental Products Evaluator: Ken Wilcox Associates, Inc.

7300 W. Friendly Ave. Tel: (816) 443-2494

Greensboro, NC 27410 Date of Evaluation: 08/04/93

Tel: (336) 547-5000
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

106

Revision Date: September 11, 1998

Gilbarco Environmental Products

Environmental Management Console (EMC)

with Line Leak Detector, Series PA0263000060X

AUTOMATIC ELECTRONIC LINE LEAK DETECTOR

Certification: Leak rate of 3.0 gph with PD = 100% and PFA = 0%. 

Leak Threshold: 1.88 gph. A pipeline system should not be declared tight if the test result indicates 

a loss that equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel, solvents.

Specification: System tests pressurized fiberglass and steel pipelines.

Tests are conducted at operating pressure.

System will not function with a mechanical line leak detector installed in the 

pipeline.

Pipeline Capacity: Maximum of 98.4 gallons.

Waiting Time: None between delivery and testing.

Minimum of 16 minutes between dispensing and testing.

Test Period: Response time is 28.8 seconds.

Test data are acquired and recorded by a microprocessor.

Calculations are automatically performed by the microprocessor.

System Features: Permanent installation on pipeline.

Automatic testing of pipeline.

Preset threshold.

Single test to determine if pipeline is leaking.

Pump shutdown (optional), message display and alarm activation if leak is declared.

Calibration: System must be checked annually and calibrated if necessary in accordance with 

manufacturer's instructions.

Gilbarco Environmental Products Evaluator: Midwest Research Institute

7300 W. Friendly Ave. Tel: (816) 753-7600

Greensboro, NC 27410 Date of Evaluation: 08/07/91

Tel: (336) 547-5000
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

107

Revision Date: September 11, 1998

Gilbarco Environmental Products

Environmental Management Console (EMC)

with Line Leak Detector, Series PA0263000060X

AUTOMATIC ELECTRONIC LINE LEAK DETECTOR

Certification: Leak rate of 0.20 gph with PD = 100% and PFA = 0%. 

Leak Threshold: 0.17 gph. A pipeline system should not be declared tight if the test result indicates 

a loss that equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel, solvents.

Specification: System tests pressurized fiberglass and steel pipelines.

Tests are conducted at operating pressure.

System will not function with a mechanical line leak detector installed in the 

pipeline.

Pipeline Capacity: Maximum of 98.4 gallons.

Waiting Time: None between delivery and testing.

Minimum of 45 minutes to 1 hour between dispensing and testing.

Test Period: Response time is 32 to 48 minutes.

Test data are acquired and recorded by a microprocessor.

Calculations are automatically performed by the microprocessor.

System Features: Permanent installation on pipeline.

Automatic testing of pipeline.

Preset threshold.

Single test to determine if pipeline is leaking.

Pump shutdown (optional), message display and alarm activation if leak is declared.

Calibration: System must be checked annually and calibrated if necessary in accordance with 

manufacturer's instructions.

Gilbarco Environmental Products Evaluator: Midwest Research Institute

7300 W. Friendly Ave. Tel: (816) 753-7600

Greensboro, NC 27410 Date of Evaluation: 12/18/96

Tel: (336) 547-5000
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

108

Revision Date: September 11, 1998

Gilbarco Environmental Products

Environmental Management Console (EMC)

with Line Leak Detector, Series PA0263000060X

AUTOMATIC ELECTRONIC LINE LEAK DETECTOR

Certification: Leak rate of 0.1 gph with PD = 100% and PFA = 0%. 

Leak Threshold: 0.05 gph. A pipeline system should not be declared tight if the test result indicates 

a loss that equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel, solvents.

Specification: System tests pressurized fiberglass and steel pipelines.

Tests are conducted at operating pressure.

System will not function with a mechanical line leak detector installed in the 

pipeline.

Pipeline Capacity: Maximum of 98.4 gallons.

Waiting Time: None between delivery and testing.

Minimum of 2 hours, 30 minutes between dispensing and testing.

Test Period: Response time is 18 minutes.

Test data are acquired and recorded by a microprocessor.

Calculations are automatically performed by the microprocessor.

System Features: Permanent installation on pipeline.

Automatic testing of pipeline.

Preset threshold.

Single test to determine if pipeline is leaking.

Pump shutdown (optional), message display and alarm activation if leak is declared.

Calibration: System must be checked annually and calibrated if necessary in accordance with 

manufacturer's instructions.

Gilbarco Environmental Products Evaluator: Midwest Research Institute

7300 W. Friendly Ave. Tel: (816) 753-7600

Greensboro, NC 27410 Date of Evaluation: 08/07/91

Tel: (336) 547-5000
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

109

Revision Date: September 11, 1998

Gilbarco Environmental Products

Environmental Management Console (EMC)

with Line Leak Detector, Series PA0263000060X

(for Flexible Pipelines)

AUTOMATIC ELECTRONIC LINE LEAK DETECTOR

Certification: Leak rate of 3.0 gph with PD = 100% and PFA = 0%. 

Leak Threshold: 1.5 gph. A pipeline system should not be declared tight if the test result indicates a 

loss that equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel, solvents.

Specification: System tests pressurized flexible pipelines.

Tests are conducted at 10 psi.

System will not function with a mechanical line leak detector installed in the 

pipeline.

Pipeline Capacity: Maximum of 40.8 gallons.

Waiting Time: None between delivery and testing.

Minimum of 13 minutes between dispensing and testing.

Test Period: Response time is 4 to 6 minutes.

Test data are acquired and recorded by a microprocessor.

Calculations are automatically performed by the microprocessor.

System Features: Permanent installation on pipeline.

Automatic testing of pipeline.

Preset threshold.

Single test to determine if pipeline is leaking.

Pump shutdown (optional), message display and alarm activation if leak is declared.

Calibration: System must be checked annually and calibrated if necessary in accordance with 

manufacturer's instructions.

Gilbarco Environmental Products Evaluator: Midwest Research Institute

7300 W. Friendly Ave. Tel: (816) 753-7600

Greensboro, NC 27410 Date of Evaluation: 10/16/95

Tel: (336) 547-5000
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

110

Revision Date: September 11, 1998

Gilbarco Environmental Products

Environmental Management Console (EMC)

with Line Leak Detector, Series PA0263000060X

(for Flexible Pipelines)

AUTOMATIC ELECTRONIC LINE LEAK DETECTOR

Certification: Leak rate of 0.2 gph with PD = 100% and PFA = 0%. 

Leak Threshold: 0.17 gph. A pipeline system should not be declared tight if the test result indicates 

a loss that equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel, solvents.

Specification: System tests pressurized flexible pipelines.

Tests are conducted at 30 psi.

System will not function with a mechanical line leak detector installed in the 

pipeline.

Pipeline Capacity: Maximum of 40.8 gallons.

Waiting Time: None between delivery and testing.

Minimum of 4 minutes to 1 hour, 9 minutes between dispensing and testing.

Test Period: Response time is 40 minutes to 1 hour.

Test data are acquired and recorded by a microprocessor.

Calculations are automatically performed by the microprocessor.

System Features: Permanent installation on pipeline.

Automatic testing of pipeline.

Preset threshold.

Single test to determine if pipeline is leaking.

Pump shutdown (optional), message display and alarm activation if leak is declared.

Calibration: System must be checked annually and calibrated if necessary in accordance with 

manufacturer's instructions.

Gilbarco Environmental Products Evaluator: Midwest Research Institute

7300 W. Friendly Ave. Tel: (816) 753-7600

Greensboro, NC 27410 Date of Evaluation: 01/13/97

Tel: (336) 547-5000
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

111

Revision Date: September 11, 1998

Gilbarco Environmental Products

Environmental Management Console (EMC)

with Line Leak Detector, Series PA0263000060X 

(for Flexible Pipelines)

AUTOMATIC ELECTRONIC LINE LEAK DETECTOR

Certification: Leak rate of 1.0 gph with PD = 100% and PFA = 0%. 

Leak Threshold: 0.05 gph. A pipeline system should not be declared tight if the test result indicates 

a loss that equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel, solvents.

Specification: System tests pressurized flexible pipelines.

Tests are conducted at operating pressure, with leak rates equivalent to 45 psi line 

pressure.

System will not function with a mechanical line leak detector installed in the 

pipeline.

Pipeline Capacity: Maximum of 40.8 gallons.

Waiting Time: None between delivery and testing.

Minimum of 1 to 4 hours between dispensing and testing.

Test Period: Response time is 45 minutes to 1 hour, 15 minutes.

Test data are acquired and recorded by a microprocessor.

Calculations are automatically performed by the microprocessor.

System Features: Permanent installation on pipeline.

Automatic testing of pipeline.

Preset threshold.

Single test to determine if pipeline is leaking.

Pump shutdown (optional), message display and alarm activation if leak is declared.

Calibration: System must be checked annually and calibrated if necessary in accordance with 

manufacturer's instructions.

Gilbarco Environmental Products Evaluator: Midwest Research Institute

7300 W. Friendly Ave. Tel: (816) 753-7600

Greensboro, NC 27410 Date of Evaluation: 10/16/95

Tel: (336) 547-5000
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

112

Revision Date: August 23, 1999

Gilbarco Environmental Products

Environmental Management Console (EMC)

with Line Leak Detector, Series PA0263000100X, PA0277000060X

AUTOMATIC ELECTRONIC LINE LEAK DETECTOR

Certification: Leak rate of 3.0 gph with PD = 100% and PFA = 0%. 

Leak Threshold: 2.5 gph. A pipeline system should not be declared tight if the test result indicates a 

loss that equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel, solvents.

Specification: System tests pressurized fiberglass and steel pipelines.

Tests are conducted at operating pressure, not to exceed 50 psi.

System will not function with a mechanical line leak detector installed in the 

pipeline.

Pipeline Capacity: Maximum of 100 gallons.

Waiting Time: None between delivery and testing.

None between dispensing and testing.

Test Period: Response time is less than 1 minute.

Test data are acquired and recorded by a microprocessor.

Calculations are automatically performed by the microprocessor.

System Features: Permanent installation on pipeline.

Automatic testing of pipeline.

Preset threshold.

Single test to determine if pipeline is leaking.

Pump shutdown (optional), message display and alarm activation if leak is declared.

Calibration: System must be checked annually and calibrated if necessary in accordance with 

manufacturer's instructions.

Gilbarco Environmental Products Evaluator: Midwest Research Institute

7300 W. Friendly Ave. Tel: (816) 753-7600

Greensboro, NC 27410 Date of Evaluation: 05/08/96

Tel: (336) 547-5000
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

113

Revision Date: September 11, 1998

Gilbarco Environmental Products

Environmental Management Console (EMC)

with Line Leak Detector, Series PA0263000100X, PA0277000060X

AUTOMATIC ELECTRONIC LINE LEAK DETECTOR

Certification: Leak rate of 0.2 gph with PD = 100% and PFA = 0%. 

Leak Threshold: 0.17 gph. A pipeline system should not be declared tight if the test result indicates 

a loss that equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel, solvents.

Specification: System tests pressurized fiberglass and steel pipelines.

Tests are conducted at operating pressure, not to exceed 50 psi.

System will not function with a mechanical line leak detector installed in the 

pipeline.

Pipeline Capacity: Maximum of 100 gallons.

Waiting Time: None between delivery and testing.

Minimum between dispensing and testing is 45 minutes.

Test Period: Response time is 45 minutes

Test data are acquired and recorded by a microprocessor.

Calculations are automatically performed by the microprocessor.

System Features: Permanent installation on pipeline.

Automatic testing of pipeline.

Preset threshold.

Single test to determine if pipeline is leaking.

Pump shutdown (optional), message display and alarm activation if leak is declared.

Calibration: System must be checked annually and calibrated if necessary in accordance with 

manufacturer's instructions.

Gilbarco Environmental Products Evaluator: Midwest Research Institute

7300 W. Friendly Ave. Tel: (816) 753-7600

Greensboro, NC 27410 Date of Evaluation: 05/08/96

Tel: (336) 547-5000
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

114

 Revision Date: September 11, 1998

Gilbarco Environmental Products

Environmental Management Console (EMC)

with Line Leak Detector, Series PA0263000100X, PA0277000060X

AUTOMATIC ELECTRONIC LINE LEAK DETECTOR

Certification: Leak rate of 0.1 gph with PD = 100% and PFA = 0%. 

Leak Threshold: 0.09 gph. A pipeline system should not be declared tight if the test result indicates 

a loss that equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel, solvents.

Specification: System tests pressurized fiberglass and steel pipelines.

Tests are conducted at operating pressure, not to exceed 50 psi.

System will not function with a mechanical line leak detector installed in the 

pipeline.

Pipeline Capacity: Maximum of 100 gallons.

Waiting Time: None between delivery and testing.

Minimum of 2 hours between dispensing and testing.

Test Period: Response time is 32 to 48 minutes.

Test data are acquired and recorded by a microprocessor.

Calculations are automatically performed by the microprocessor.

System Features: Permanent installation on pipeline.

Automatic testing of pipeline.

Preset threshold.

Single test to determine if pipeline is leaking.

Pump shutdown (optional), message display and alarm activation if leak is declared.

Calibration: System must be checked annually and calibrated if necessary in accordance with 

manufacturer's instructions.

Gilbarco Environmental Products Evaluator: Midwest Research Institute

7300 W. Friendly Ave. Tel: (816) 753-7600

Greensboro, NC 27410 Date of Evaluation: 05/08/96

Tel: (336) 547-5000
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

115

Revision Date: September 11, 1998

Gilbarco Environmental Products

EMC Environmental Management Console

EMC Basic Monitoring System Tank Monitors 2, 3, 2.1, 3.1 PAO238000XXXX

(Capacitance Probe)

AUTOMATIC TANK GAUGING METHOD

Certification: Leak rate of 0.2 gph with PD = 99% and PFA = 1%. 

Leak Threshold: 0.1 gph. A tank system should not be declared tight if the test result indicates a loss 

or gain that equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel, solvents.

Tank Capacity: Maximum of 15,000 gallons.

Tank must be between 50 and 95% full.

Waiting Time: Minimum of 8 hours, 18 minutes between delivery and testing.

There is no dispensing or delivery during waiting time.

Test Period: Minimum of 5 hours.

Test data are acquired and recorded by the system’s computer.

Leak rate is calculated from the difference between the first and last data collected.

There must be no dispensing or delivery during test.

Temperature: Average for product is obtained by a temperature averaging probe.

Water Sensor: Must be used to detect water ingress.

Minimum detectable water level in the tank is 1.40 inches.

Minimum detectable water level change is 0.040 inch.

Calibration: Temperature averaging probe must be calibrated in accordance with 

manufacturer's instructions.

Comments: Not evaluated using manifold tank systems.

Tests only portion of tank containing product.

As product level is lowered, leak rate in a leaking tank decreases (due to lower head 

pressure). Consistent testing at low levels could allow a leak to remain undetected.

EPA leak detection regulations require testing of the portion of the tank system which 

routinely contains product.

Capacitance probes do not work with oxygenated fuels.

Gilbarco Environmental Products Evaluator: Midwest Research Institute

7300 W. Friendly Ave. Tel: (816) 753-7600

Greensboro, NC 27410 Date of Evaluation: 05/14/93

Tel: (336) 547-5000
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

116

Revision Date: September 11, 1998

Gilbarco Environmental Products

EMC Environmental Management Console

EMC Basic Monitoring System Tank Monitors 2.1, 3.1, PAO264XXX0000

(Capacitance Probe)

AUTOMATIC TANK GAUGING METHOD

Certification: Leak rate of 0.2 gph with PD = 99% and PFA = 0.2%. 

Leak Threshold: 0.126 gph. A tank system should not be declared tight if the test result indicates a 

loss or gain that equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel, solvents.

Tank Capacity: Maximum of 15,000 gallons.

Tank must be between 50 and 95% full.

Waiting Time: Minimum of 8 hours, 18 minutes between delivery and testing.

There must be no dispensing or delivery during waiting time.

Test Period: Minimum of 2 hours.

Test data are acquired and recorded by the system’s computer.

Leak rate is calculated from the difference between the first and last data collected.

There must be no dispensing or delivery during test.

Temperature: Average for product is determined by a minimum of 5 thermistors.

Water Sensor: Must be used to detect water ingress.

Minimum detectable water level in the tank is 1.52 inches.

Minimum detectable change in water level is 0.027 inch.

Calibration: Thermistors and probe must be calibrated in accordance with manufacturer's 

instructions.

Comments: Not evaluated using manifold tank systems.

Tests only portion of tank containing product.

As product level is lowered, leak rate in a leaking tank decreases (due to lower head 

pressure). Consistent testing at low levels could allow a leak to remain undetected.

EPA leak detection regulations require testing of the portion of the tank system which 

routinely contains product.

Capacitance probes do not work with oxygenated fuels.

Gilbarco Environmental Products Evaluator: Midwest Research Institute

7300 W. Friendly Ave. Tel: (816) 753-7600

Greensboro, NC 27410 Date of Evaluation: 05/14/93

Tel: (336) 547-5000
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

117

Revision Date: September 11, 1998

Gilbarco Environmental Products

EMC Environmental Management Console

EMC Basic Monitoring System Tank Monitors 2.1, 3.1, PAO264XXX0000

(Capacitance Probe)

AUTOMATIC TANK GAUGING METHOD

Certification: Leak rate of 0.1 gph with PD = 99% and PFA = 0.1%. 

Leak Threshold: 0.071 gph. A tank system should not be declared tight if the test result indicates a 

loss or gain that equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel, solvents.

Tank Capacity: Maximum of 15,000 gallons.

Tank must be minimum 95% full.

Waiting Time: Minimum of 8 hours, 15 minutes between delivery and testing.

Minimum of 30 minutes between dispensing and testing.

There must be no dispensing or delivery during waiting time.

Test Period: Minimum of 2 hours.

Test data are acquired and recorded by the system’s computer.

Leak rate is calculated from the difference between the first and last data collected.

There must be no dispensing or delivery during test.

Temperature: Average for product is determined by a minimum of 5 thermistors.

Water Sensor: Must be used to detect water ingress.

Minimum detectable water level in the tank is 1.52 inches.

Minimum detectable water level change is 0.027 inch.

Calibration: Thermistors and probe must be calibrated in accordance with manufacturer's 

instructions.

Comments: Not evaluated using manifold tank systems.

Tests only portion of tank containing product.

As product level is lowered, leak rate in a leaking tank decreases (due to lower head 

pressure). Consistent testing at low levels could allow a leak to remain undetected.

EPA leak detection regulations require testing of the portion of the tank system which 

routinely contains product.

Capacitance probes do not work with oxygenated fuels.

Gilbarco Environmental Products Evaluator: Midwest Research Institute

7300 W. Friendly Ave. Tel: (816) 753-7600

Greensboro, NC 27410 Date of Evaluation: 05/14/93

Tel: (336) 547-5000
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

118

Revision Date: September 11, 1998

Gilbarco Environmental Products

EMC Environmental Management Console

EMC Basic Monitoring System Tank Monitors 2.1, 3.1, PAO265XXX0000

(Magnetostrictive Probe)

AUTOMATIC TANK GAUGING METHOD

Certification: Leak rate of 0.2 gph with PD = 99% and PFA = 0.1%. 

Leak Threshold: 0.093 gph. A tank system should not be declared tight if the test result indicates a 

loss or gain that equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel, solvents.

Tank Capacity: Maximum of 15,000 gallons.

Tank must be between 50 and 95% full.

Waiting Time: Minimum of 8 hours, 18 minutes between delivery and testing.

Minimum of 30 minutes between dispensing and testing.

There must be no delivery during waiting time.

Test Period: Minimum of 2 hours.

Test data are acquired and recorded by the system’s computer.

Leak rate is calculated from the difference between the first and last data collected.

There must be no dispensing during test.

Temperature: Average for product is determined by a minimum of 5 thermistors.

Water Sensor: Must be used to detect water ingress.

Minimum detectable water level in the tank is 0.544 inch.

Minimum detectable change in water level is 0.027 inch.

Calibration: Thermistors and probe must be calibrated in accordance with manufacturer's 

instructions.

Comments: Not evaluated using manifold tank systems.

Tests only portion of tank containing product.

As product level is lowered, leak rate in a leaking tank decreases (due to lower head 

pressure). Consistent testing at low levels could allow a leak to remain undetected.

EPA leak detection regulations require testing of the portion of the tank system which 

routinely contains product.

Gilbarco Environmental Products Evaluator: Midwest Research Institute

7300 W. Friendly Ave. Tel: (816) 753-7600

Greensboro, NC 27410 Date of Evaluation: 05/14/93

Tel: (336) 547-5000
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

119

Revision Date: September 11, 1998

Gilbarco Environmental Products

EMC Environmental Management Console

EMC Basic Monitoring System Tank Monitors 2.1, 3.1, PAO265XXX0000 

(Magnetostrictive Probe)

AUTOMATIC TANK GAUGING METHOD

Certification: Leak rate of 0.1 gph with PD = 99% and PFA = 1%. 

Leak Threshold: 0.071 gph. A tank system should not be declared tight if the test result indicates a 

loss or gain that equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel, solvents.

Other liquids may be tested after consultation with the manufacturer.

Tank Capacity: Maximum of 15,000 gallons.

Tank must be minimum 95% full.

Waiting Time: Minimum of 8 hours, 15 minutes between delivery and testing.

Minimum of 30 minutes between dispensing and testing.

There must be no delivery during waiting time.

Test Period: Minimum of 3 hours.

Test data are acquired and recorded by the system’s computer.

Leak rate is calculated from the difference between the first and last data collected.

There must be no dispensing during test.

Temperature: Average for product is determined by a minimum of 5 thermistors.

Water Sensor: Must be used to detect water ingress.

Minimum detectable water level in the tank is 0.544 inch.

Minimum detectable change in water level is 0.027 inch. 

Calibration: Thermistors and probe must be calibrated in accordance with manufacturer's 

instructions.

Comments: Not evaluated using manifold tank systems.

Tests only portion of tank containing product.

As product level is lowered, leak rate in a leaking tank decreases (due to lower head 

pressure). Consistent testing at low levels could allow a leak to remain undetected.

EPA leak detection regulations require testing of the portion of the tank system which 

routinely contains product.

Gilbarco Environmental Products Evaluator: Midwest Research Institute

7300 W. Friendly Ave. Tel: (816) 753-7600

Greensboro, NC 27410 Date of Evaluation: 03/14/95

Tel: (336) 547-5000
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

120

Revision Date: August 23, 1999

Gilbarco Environmental Products

EMC/PC Series Monitoring Systems

PA0265 and PA0300

(Magnetostrictive Probe)

AUTOMATIC TANK GAUGING METHOD

Certification: Leak rate of 0.2 gph with PD = 99.5% and PFA = 1.6%.

Leak Threshold: 0.126 gph. A tank system should not be declared tight if the test result indicates a 

loss or gain that equals or exceeds this threshold.

Applicability: Gasoline, diesel, aviation fuel. 

Other liquids maybe tested after consultation with the manufacturer.

Tank Capacity: Maximum of 20,000 gallons.

Tanks less than 95% full may be tested. 

Minimum product level required is based on tank diameter as follows:

48" dia./min. 18"; 64" dia./min. 21"; 72" dia./min. 24"; 96" dia./min. 30"; 

126" dia./min. 39"; 132" dia./min. 39". For other diameters see evaluation report.

Waiting Time: Minimum of 8 hours between delivery and testing.

Minimum of 30 minutes between dispensing and testing.

There must be no delivery during waiting time.

Test Period: Minimum of 2 hours.

Test data are acquired and recorded by the system's computer.

Leak rate is calculated from the difference between the first and last data collected.

There must be no dispensing or delivery during test.

Temperature: Average for product is determined by probe which contains 5 thermistors.

At least two thermistors must be submerged in product during test.

Water Sensor: Must be used to detect water ingress.

Minimum detectable water level in the tank is 0.66 inch.

System is programmed to report water depth only when it exceeds 0.75 inch.

Minimum detectable change in water level is 0.005 inch.

Calibration: Thermistors and probe must be checked and calibrated in accordance with 

manufacturer's instructions.

Comments: Not evaluated using manifold tank systems. 

Tests only portion of tank containing product. 

As product level is lowered, leak rate in a leaking tank decreases (due to lower head 

pressure). Consistent testing at low levels could allow a leak to remain undetected.

EPA leak detection regulations require testing of the portion of the tank which routinely 

contains product.

Gilbarco Environmental Products Evaluator: Ken Wilcox Associates

7300 W. Friendly Ave. Tel: (816) 443-2494

Greensboro, NC 27410 Date of Evaluation: 06/29/98

Tel: (366) 547-5000
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

121

Revision Date: September 11, 1998

Gilbarco Environmental Products

EMC Series with CSLD, PAO265XXXX100, PA0300XXXX100

(Magnetostrictive Probe)

CONTINUOUS IN-TANK LEAK DETECTION METHOD

Certification: Leak rate of 0.2 gph with PD = 100% and PFA = 0%. 

Leak Threshold: 0.16 gph for single tanks at 99% operating mode.

0.15 gph for manifold tank systems at 99% operating mode.

A tank system should not be declared tight, and a message is printed for the operator, if the 

test results indicate a loss or gain that exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel, waste oil, solvents.

Tank Capacity: Maximum of 38,170 gallons for single tanks and for all tanks manifolded together.

Contact manufacturer for tank system applications if total tank capacity exceeds 30,000 

gallons.

Throughput: Monthly maximum of 221,890 gallons.

Waiting Time: Minimum of 3 hours between delivery and testing.

Temperature: Average for product is determined by a minimum of 5 thermistors.

Water Sensor: Must be used to detect water ingress.

Minimum detectable water level in the tank is 0.54 inch.

Minimum detectable change in water level is 0.027 inch.

Calibration: Thermistors and probe must be checked annually and calibrated if necessary in accordance 

with manufacturer's instructions. 

System set-up menu must be checked to verify that the 99% operating mode option has been 

selected.

Comments: During installation, the set-up menu provides a choice between a 99% or a 95% operating 

mode. 

This evaluation covers only the 99% operating mode. At this time, there is no evaluation 

covering the 95% mode.

System reports a quantitative result of pass or fail.

Evaluated using both single and manifold tank systems.

System collects data at naturally occurring product levels without interfering with normal tank

operation, and discards data from unstable periods when system performs test. 

Data can be collected at any level above 12 inches of product.

Leak rates above 1 gph are either reported as “fail” or as “no idle.”

For valid monthly testing, a conclusive test report must be produced for each tank every month. 

Systems warns the operator if there are no “ passing” tests completed during the month. For 

very active tanks, a tank shut down may become necessary in order for the system to collect 

enough quiet-time data for a test.

Constant and variable leaks were mathematically induced into tight tank test records which 

were 

collected by systems installed at various active tank sites.

The data base for evaluation of the system included sites with vapor recovery and blending 

dispensers. 

Tanks used in this evaluation contained gasoline and diesel.
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

122

Gilbarco Environmental Products Evaluator: Midwest Research Institute

7300 W. Friendly Ave. Tel: (816) 753-7600

Greensboro, NC 27410 Date of Evaluation: 06/10/96

Tel: (336) 547-5000
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

123

Revision Date: August 23, 1999

Gilbarco Environmental Products

PA02590XXX000, PA02591144000, PA02592000000

LIQUID-PHASE INTERSTITIAL DETECTOR

Detector:

Output type: qualitative

Sampling frequency: continuous

Operating principle: float switch

Test Results:

PA02590XXX000 unleaded gasoline synthetic gasoline

Response time (min) 3.66 3.45

Recovery time (min) <1 <1

Lower detection limit (cm) 1.84 1.65

PA02591144000

Response time (min) 6.00 6.51

Recovery time (min) <1 <1

Lower detection limit (cm) 4.05 4.17

PA02592000000

Response time (min) 8.19 8.49

Recovery time (min) <1 <1

Lower detection limit (cm) 4.67 4.36

Specificity Results (in addition to above):

Activated: diesel fuel, heating oil #2, water.

Comments:

Sensors are reusable.

Gilbarco Environmental Products Evaluator: Carnegie Mellon Research Institute

7300 W. Friendly Ave. Tel: (412) 268-3495

Greensboro, NC 27410 Date of Evaluation: 07/17/92

Tel: (336) 547-5000
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

124

Revision Date: September 11, 1998

Gilbarco Environmental Products

Environmental Management Console (EMC)

Groundwater Sensor, series PA02700XX0001

LIQUID-PHASE OUT-OF-TANK PRODUCT DETECTOR

Detector:

Output type: qualitative

Sampling frequency: continuous

Operating principle: electrical conductivity

Test Results:

unleaded gasoline synthetic gasoline

Detection time (min:sec) 08:55 06:18

Fall time (min:sec) 54:50 26:02

Lower detection limit (cm) 0.02 0.02

Specificity Results (in addition to above):

Activated: n-hexane, diesel fuel, jet-A fuel, toluene, xylene(s).

Calibration:

Sensor must be checked annually for operability or in accordance with manufacturer's instructions and 

calibrated/replaced if necessary.

Comments:

Sensors are reusable.

Gilbarco Environmental Products Evaluator: Carnegie Mellon Research Institute

7300 W. Friendly Ave. Tel: (412) 268-3495

Greensboro, NC 27410 Date of Evaluation: 11/20/91

Tel: (336) 547-5000
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

125

Revision Date: September 11, 1998

Gilbarco Environmental Products

PA02660000000

VAPOR-PHASE OUT-OF-TANK PRODUCT DETECTOR

Detector:

Output type: qualitative

Sampling frequency: continuous

Operating principle: adsistor

Test Results:

unleaded gasoline synthetic gasoline JP-4 jet fuel

Detection time (min:sec) 7:46 N/A* 17:01

Fall time (min:sec) 2:38 N/A 3:05

Lower detection limit (ppm) 500 >1000 500

*See glossary.

Specificity Results:

Not activated: n-hexane, toluene, xylene(s).

Gilbarco Environmental Products Evaluator: Carnegie Mellon Research Institute

7300 W. Friendly Ave. Tel: (412) 268-3495

Greensboro, NC 27410 Date of Evaluation: 07/24/92

Tel: (336) 547-5000
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

126

Revision Date: November 14, 1997

Hasstech

LineTite Pipeline Leak Monitor 

AUTOMATIC ELECTRONIC LINE LEAK DETECTOR

Certification: Leak rate of 3.0 gph with PD = 100% and PFA = 0%. 

Leak Threshold: 2.0 gph. A pipeline system should not be declared tight if the test result indicates a 

loss that equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel.

Specification: System tests fiberglass and steel pipelines.

Tests are conducted at operating pressure.

System will not function with a mechanical line leak detector installed on the 

pipeline.

Pipeline Capacity: Maximum of 341 gallons.

Waiting Time: None between delivery and testing.

None between dispensing and testing.

Test Period: Response time is 1 to 26 minutes.

Test data are acquired and recorded by a permanently installed microprocessor. 

Calculations are automatically performed by the microprocessor.

System Features: Permanent installation on pipeline.

Automatic testing of pipeline.

Preset threshold.

Single test to determine if pipeline is leaking.

Pump shutdown, message display, and alarm activation if leak is declared.

Calibration: System must be checked annually and calibrated if necessary in accordance with 

manufacturer's instructions.

Hasstech Evaluator: Ken Wilcox Associates

6985 Flanders Dr. Tel: (816) 443-2494

San Diego, CA 92121 Dates of Evaluation: 10/15/91, 04/10/94

Tel: (619) 457-5880
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

127

Revision Date: November 14, 1997

Hasstech

LineTite Pipeline Leak Monitor 

AUTOMATIC ELECTRONIC LINE LEAK DETECTOR

Certification: Leak rate of 0.1 gph with PD = 100% and PFA = 0%. 

Leak Threshold: 0.062 gph. A pipeline system should not be declared tight if the test result indicates 

a loss that equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel.

Specification: System tests fiberglass and steel pipelines.

Tests are conducted at operating pressure.

System will not function with a mechanical line leak detector installed in the 

pipeline.

Pipeline Capacity: Maximum of 341 gallons.

Waiting Time: None between delivery and testing.

None between dispensing and testing.

Test Period: Response time is 1 hour, 30 minutes to 12 hours, 30 minutes.

Test data are acquired and recorded by a permanently installed microprocessor. 

Calculations are automatically performed by the microprocessor.

System Features: Permanent installation on pipeline.

Automatic testing of pipeline.

Preset threshold.

Single test to determine if pipeline is leaking.

Pump shutdown, message display, and alarm activation if leak is declared.

Calibration: System must be checked annually and calibrated if necessary in accordance with 

manufacturer's instructions.

Hasstech Evaluator: Ken Wilcox Associates

6985 Flanders Dr. Tel: (816) 443-2494

San Diego, CA 92121 Dates of Evaluation: 10/15/91, 04/10/94

Tel: (619) 457-5880
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

128

Revision Date: November 14, 1998

Hasstech

LineTite Pipeline Leak Monitor 

(for Flexible Pipelines)

AUTOMATIC ELECTRONIC LINE LEAK DETECTOR

Certification: Leak rate of 3.0 gph with PD = 100% and PFA = 0%. 

Leak Threshold: 2.0 gph. A pipeline system should not be declared tight if the test result indicates a 

loss or gain that equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel.

Specification: System tests flexible pipelines.

Tests are conducted at operating pressure.

System will not function with a mechanical line leak detector installed on the 

pipeline.

Pipeline Capacity: Maximum of 49.6 gallons.

Waiting Time: None between delivery and testing.

None between dispensing and testing.

Test Period: Response time is 1 to 6 minutes.

Test data are acquired and recorded by a permanently installed microprocessor. 

Calculations are automatically performed by the microprocessor.

System Features: Permanent installation on pipeline.

Automatic testing of pipeline.

Preset threshold.

Single test to determine if pipeline is leaking.

Pump shutdown, message display, and alarm activation if leak is declared.

Calibration: System must be checked annually and calibrated if necessary in accordance with 

manufacturer's instructions.

Hasstech Evaluator: Ken Wilcox Associates

6985 Flanders Dr. Tel: (816) 443-2494

San Diego, CA 92121 Dates of Evaluation: 10/15/91, 04/10/94

Tel: (619) 457-5880
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

129

Revision Date: November 14, 1998

Hasstech

LineTite Pipeline Leak Monitor 

(for Flexible Pipelines)

AUTOMATIC ELECTRONIC LINE LEAK DETECTOR

Certification: Leak rate of 0.1 gph with PD = 100% and PFA = 0%. 

Leak Threshold: 0.062 gph. A pipeline system should not be declared tight if the test result indicates 

a loss that equals or exceeds this threshold.

Applicability: Gasoline, diesel, aviation fuel.

Specification: System tests flexible pipelines.

Tests are conducted at operating pressure.

System will not function with a mechanical line leak detector installed in the 

pipeline.

Pipeline Capacity: Maximum of 49.6 gallons.

Waiting Time: None between delivery and testing.

None between dispensing and testing.

Test Period: Response time is 2 hours, 18 minutes to 5 hours.

Test data are acquired and recorded by a permanently installed microprocessor. 

Calculations are automatically performed by the microprocessor.

System Features: Permanent installation on pipeline.

Automatic testing of pipeline.

Preset threshold.

Single test to determine if pipeline is leaking.

Pump shutdown, message display, and alarm activation if leak is declared.

Calibration: System must be checked annually and calibrated if necessary in accordance with 

manufacturer's instructions.

Hasstech Evaluator Ken Wilcox Associates

6985 Flanders Dr. Tel: (816) 443-2494

San Diego, CA 92121 Dates of Evaluation: 10/15/91, 04/10/94

Tel: (619) 457-5880
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

130

Revision Date: August 23, 1999

Hasstech

LineTight Pipeline Leak Monitor Model 2001J

AUTOMATIC ELECTRONIC LINE LEAK DETECTOR

Certification: Leak rate of 3.0 gph with PD = 100% and PFA = 0%. 

Leak Threshold: 2.5 gph. A pipeline system should not be declared tight if the test result indicates a 

loss that equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel, fuel oil #4.

Specification: System tests pressurized fiberglass and steel pipelines.

Tests are conducted at operating pressure, not to exceed 50 psi.

System will not function with a mechanical line leak detector installed in the 

pipeline.

Pipeline Capacity: Maximum of 172 gallons.

Waiting Time: None between delivery and testing.

None between dispensing and testing.

Test Period: Response time is 1 to 5 minutes.

Test data are acquired and recorded by a microprocessor.

Calculations are automatically performed by the microprocessor.

System Features: Permanent installation on pipeline.

Automatic testing of pipeline.

Preset threshold.

Single test to determine if pipeline is leaking.

Pump shutdown, message display, and alarm activation if leak is declared.

Calibration: System must be checked annually and calibrated if necessary in accordance with 

manufacturer's instructions.

Hasstech Evaluator: Ken Wilcox Associates

6985 Flanders Dr. Tel: (816) 443-2494

San Diego, CA 92121 Date of Evaluation: 04/15/97

Tel: (619) 457-5880
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

131

Revision Date: August 23, 1999

Hasstech

LineTight Pipeline Leak Monitor Model 2001J

AUTOMATIC ELECTRONIC LINE LEAK DETECTOR

Certification: Leak rate of 0.1 gph with PD = 100% and PFA = 0%. 

Leak Threshold: 0.05 gph. A pipeline system should not be declared tight if the test result indicates 

a loss that equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel, fuel oil #4.

Specification: System tests pressurized fiberglass and steel pipelines.

Tests are conducted at operating pressure, not to exceed 50 psi.

System will not function with a mechanical line leak detector installed in the 

pipeline.

Pipeline Capacity: Maximum of 172 gallons.

Waiting Time: None between delivery and testing.

None between dispensing and testing.

Test Period: Response time is 2 hours, 10 minutes.

Test data are acquired and recorded by a microprocessor.

Calculations are automatically performed by the microprocessor.

System Features: Permanent installation on pipeline.

Automatic testing of pipeline.

Preset threshold.

Single test with multiple data acquisition cycles to determine if pipeline is leaking.

Pump shutdown, message display, and alarm activation if leak is declared.

Calibration: System must be checked annually and calibrated if necessary in accordance with 

manufacturer's instructions.

Hasstech Evaluator: Ken Wilcox Associates

6985 Flanders Dr. Tel: (816) 443-2494

San Diego, CA 92121 Date of Evaluation: 05/28/98

Tel: (619) 457-5880
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

132

Revision Date: August 23, 1999

Hasstech

LineTight Pipeline Leak Monitor Model 2001J

(for Flexible Pipelines)

AUTOMATIC ELECTRONIC LINE LEAK DETECTOR

Certification: Leak rate of 3.0 gph with PD = 100% and PFA = 0%. 

Leak Threshold: 2.5 gph. A pipeline system should not be declared tight if the test result indicates a 

loss that equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel, fuel oil #4.

Specification: System tests pressurized flexible pipelines.

Tests are conducted at operating pressure, not to exceed 50 psi.

System will not function with a mechanical line leak detector installed in the 

pipeline.

Pipeline Capacity: Maximum of 39.5 gallons.

Waiting Time: None between delivery and testing.

None between dispensing and testing.

Test Period: Response time is 1 minute.

Test data are acquired and recorded by a microprocessor.

Calculations are automatically performed by the microprocessor.

System Features: Permanent installation on pipeline.

Automatic testing of pipeline.

Preset threshold.

Single test to determine if pipeline is leaking.

Pump shutdown, message display, and alarm activation if leak is declared.

Calibration: System must be checked annually and calibrated if necessary in accordance with 

manufacturer's instructions.

Hasstech Evaluator: Ken Wilcox Associates

6985 Flanders Dr. Tel: (816) 443-2494

San Diego, CA 92121 Date of Evaluation: 04/15/97

Tel: (619) 457-5880
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

133
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

134

Revision Date: August 23, 1999

Hasstech

LineTight Pipeline Leak Monitor Model 2001J

(for Flexible Pipelines)

AUTOMATIC ELECTRONIC LINE LEAK DETECTOR

Certification: Leak rate of 0.1 gph with PD = 100% and PFA = 0%. 

Leak Threshold: 0.05 gph. A pipeline system should not be declared tight if the test result indicates 

a loss that equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel, fuel oil #4.

Specification: System tests pressurized flexible pipelines.

Tests are conducted at operating pressure, not to exceed 50 psi.

System will not function with a mechanical line leak detector installed in the 

pipeline.

Pipeline Capacity: Maximum of 39.5 gallons.

Waiting Time: None between delivery and testing.

None between dispensing and testing.

Test Period: Response time is 6 hours, 37 minutes.

Test data are acquired and recorded by a microprocessor.

Calculations are automatically performed by the microprocessor.

System Features: Permanent installation on pipeline.

Automatic testing of pipeline.

Preset threshold.

Single test with multiple data acquisition cycles to determine if pipeline is leaking.

Pump shutdown, message display, and alarm activation if leak is declared.

Calibration: System must be checked annually and calibrated if necessary in accordance with 

manufacturer's instructions.

Hasstech Evaluator: Ken Wilcox Associates

6985 Flanders Dr. Tel: (816) 443-2494

San Diego, CA 92121 Date of Evaluation: 05/20/98

Tel: (619) 457-5880
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

135
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

136

Revision Date: November 14, 1997

Hasstech

Tank Compliance Center, Model 700

(7100 Series Magnetostrictive Probe)

AUTOMATIC TANK GAUGING METHOD

Certification: Leak rate of 0.2 gph with PD = 99.9% and PFA = 0.1%.

Leak Threshold: 0.1 gph. A tank system should not be declared tight if the test result indicates a loss 

or gain that equals or exceeds this threshold.

Applicability: Gasoline, diesel, aviation fuel, fuel oil #4, waste oil, solvents, other substances with a 

specific gravity > 0.6 and a viscosity < 1500 cp.

Tank Capacity: Maximum of 15,000 gallons.

Tank must be between 50 and 95% full.

Waiting Time: Minimum of 2 hours between delivery and testing.

Minimum of 2 hours between dispensing and testing.

There must be no delivery during waiting time.

Test Period: Minimum of 2 hours. 

Test data are acquired and recorded by a computer. 

Leak rate is calculated from data determined to be valid by statistical analysis.

There must be no dispensing or delivery during test.

Temperature: Average for product is determined by a minimum of 5 thermistors. 

Water Sensor: Must be used to detect water ingress.

Minimum detectable water level in the tank is 0.186 inch. 

Minimum detectable change in water level is 0.0048 inch.

Calibration: Thermistors and probe must be checked and calibrated in accordance with 

manufacturer’s instructions.

Comments: Not evaluated using manifold tank systems.

Tests only portion of tank containing product.

As product level is lowered, leak rate in a leaking tank decreases (due to lower head 

pressure). Consistent testing at low levels could allow a leak to remain undetected.

EPA leak detection regulations require testing of the portion of the tank system which 

routinely contains product.

Hasstech Evaluator: Ken Wilcox Associates

6985 Flanders Dr. Tel: (816) 443-2494

San Diego, CA 92121 Date of Evaluation: 03/14/95

Tel: (619) 457-5880
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

137

Revision Date: November 14, 1997

Hasstech

Tank Compliance Center, Model 700

(7100 Series Magnetostrictive Probe)

AUTOMATIC TANK GAUGING METHOD

Certification: Leak rate of 0.1 gph with PD = 99.6% and PFA = 0.4%.

Leak Threshold: 0.05 gph. A tank system should not be declared tight if the test result indicates a loss 

or gain that equals or exceeds this threshold.

Applicability: Gasoline, diesel, aviation fuel, fuel oil #4, waste oil, solvents, other substances with a 

specific gravity > 0.6 and a viscosity < 1500 cp.

Tank Capacity: Maximum of 15,000 gallons.

Tank must be between 50 and 95% full.

Waiting Time: Minimum of 2 hours between delivery and testing.

Minimum of 2 hours between dispensing and testing.

There must be no delivery during waiting time.

Test Period: Minimum of 6 hours. 

Test data are acquired and recorded by a computer. 

Leak rate is calculated from data determined to be valid by statistical analysis.

There must be no dispensing or delivery during test.

Temperature: Average for product is determined by a minimum of 5 thermistors. 

Water Sensor: Must be used to detect water ingress.

Minimum detectable water level in the tank is 0.1860 inch. 

Minimum detectable change in water level is 0.0048 inch.

Calibration: Thermistors and probe must be checked and calibrated in accordance with 

manufacturer’s instructions.

Comments: Not evaluated using manifold tank systems.

Tests only portion of tank containing product.

As product level is lowered, leak rate in a leaking tank decreases (due to lower head 

pressure). Consistent testing at low levels could allow a leak to remain undetected.

EPA leak detection regulations require testing of the portion of the tank system which 

routinely contains product.

Hasstech Evaluator: Ken Wilcox Associates

6985 Flanders Dr. Tel: (816) 443-2494

San Diego, CA 92121 Date of Evaluation: 03/14/95

Tel: (619) 457-5880
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

138

 Revision Date: November 14, 1997

Hasstech

AcuRite

LINE TIGHTNESS TEST METHOD

Certification: Leak rate of 0.1 gph with PD = 100% and PFA = 0%. 

Leak Threshold: 0.01 gph. A pipeline system should not be declared tight if the test result indicates 

a loss that equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel, fuel oil #4.

Specification: System tests fiberglass and steel pipelines.

Tests are conducted at 150% operating pressure.

Mechanical line leak detector must be removed from pipeline for duration of test.

Pipeline Capacity: Maximum of 75 gallons.

Waiting Time: Minimum of 6 hours between delivery and testing. 

Minimum of 30 minutes between dispensing and testing.

Test Period: Minimum of 30 minutes.

Test data are acquired and recorded manually.

Manual calculations are performed by the operator on site.

Calibration: System must be checked annually and calibrated if necessary in accordance with 

manufacturer's instructions.

Hasstech Evaluator: Lamar University

6985 Flanders Dr. Tel: (409) 880-8788

San Diego, CA 92121 Date of Evaluation: 03/25/91

Tel: (619) 457-5880
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

139

Revision Date: November 14, 1997

Hasstech

Leak Computer Tank Test System

VOLUMETRIC TANK TIGHTNESS TEST METHOD (OVERFILL) (Edison Lab Protocol)

Certification: Leak rate of 0.1 gph with PD = 95% and PFA = 5%.

Leak Threshold: 0.05 gph. A tank system should not be declared tight if the test result indicates a loss 

or gain that equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel, fuel oils #4 and #6, waste oil, solvents. 

Other liquids may be tested after consultation with the manufacturer.

Tank Capacity: Maximum of 12,000 gallons.

Tank must be minimum 100% full.

Waiting Time: Test data are acquired and recorded by a computer that calculates a leak rate every 

minute, and determines waiting time for satisfactory data (test is finished when the 

standard deviation of 30 sequential leak rates is less than half of the last leak rate 

determined).

There must be no dispensing or delivery during waiting time.

Test Period: Minimum of 1 hour, 10 minutes.

Test data are acquired and recorded by a computer.

Leak rate is calculated from data determined to be valid by statistical analysis.

There must be no dispensing or delivery of product during test.

Temperature: Average for product is determined by a minimum of 7 thermistors.

Groundwater: If depth to groundwater in backfill cannot be determined, tank must pass a two level 

test with at least a 3 foot difference in product level. 

If depth to groundwater in backfill can be determined, a single level test can be 

conducted provided a minimum net pressure of 1 psi exists at bottom of tank during 

test.

Calibration: Level sensor must be calibrated before each test.

Thermistors must be checked annually and calibrated if necessary.

Comments: Not evaluated using manifold tank systems.

Evaluated at EPA Edison Risk Reduction Engineering 

Laboratory prior to the EPA standard protocols being written.

Hasstech Evaluator: U.S. EPA Risk Reduction 

6985 Flanders Dr. Engineering Laboratory

San Diego, CA 92121 Tel: (201) 321-6631

Tel: (619) 457-5880 Date of Evaluation: 11/88
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

140

Revision Date: November 14, 1997

Hasstech

Leak Computer Tank Test System

VOLUMETRIC TANK TIGHTNESS TEST METHOD (UNDERFILL)

Certification: Leak rate of 0.1 gph with PD > 99% and PFA < 1.0%.

Leak Threshold: 0.05 gph. A tank system should not be declared tight if the test result indicates a loss 

or gain that equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel, fuel oils #4 and #6, waste oil, solvents. 

Other liquids may be tested after consultation with the manufacturer.

Tank Capacity: Maximum of 15,000 gallons.

Tank must be minimum 90% full.

Waiting Time: Test data are acquired and recorded by a computer that calculates a leak rate every 

minute, and determines waiting time for satisfactory data (test is finished when the 

standard deviation of 30 sequential leak rates is less than half of the last leak rate 

determined).

There must be no dispensing or delivery during waiting time.

Test Period: Minimum of 1 hour, 10 minutes.

Test data are acquired and recorded by a computer.

Leak rate is calculated from data determined to be valid by statistical analysis.

There must be no dispensing or delivery during test.

Temperature: Average for product is determined by a minimum of 7 thermistors.

Groundwater: Depth to groundwater in backfill must be determined. If groundwater is above bottom 

of tank, product level must be adjusted to provide a minimum net pressure of 1 psi at 

bottom of tank during test.

Calibration: Level sensor must be calibrated before each test.

Thermistors must be checked annually and calibrated if necessary.

Comments: Not evaluated using manifold tank systems.

Tests only portion of tank containing product.

As product level is lowered, leak rate in a leaking tank decreases (due to lower head 

pressure). Consistent testing at low levels could allow a leak to remain undetected.

EPA leak detection regulations require testing of the portion of the tank system which 

routinely contains product.

Hasstech Evaluator: Law Engineering Industrial Services

6985 Flanders Dr. Tel: (800) 672-6601

San Diego, CA 92121 Date of Evaluation: 04/17/91

Tel: (619) 457-5880
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

141

Revision Date: November 14, 1997

Heath Consultants, Inc.

Petro Tite Line Tester

LINE TIGHTNESS TEST METHOD

Certification: Leak rate of 0.1 gph with PD = 99.99% and PFA = 0.37%.

Leak Threshold: 0.01 gph. A pipeline system should not be declared tight if the test result indicates 

a loss that equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel, fuel oil.

Specification: System tests fiberglass and steel pipelines.

Tests are conducted at 150% operating pressure.

Mechanical line leak detector must be removed from pipeline for duration of test.

Pipeline Capacity: Maximum of 129 gallons.

Waiting Time: None between delivery and testing.

None between dispensing and testing.

Test Period: Minimum of 1 hour (four 15 minute readings). A 1 hour pretest at or above test 

pressure is conducted to eliminate the effects of pipe deflection/stretch on the 

results. 

Test data are acquired and recorded manually.

Calibration: System must be checked annually and calibrated if necessary in accordance with 

manufacturer's instructions.

Heath Consultants, Inc. Evaluator: Ken Wilcox Associates

9030 Monroe Rd. Tel: (816) 443-2494

Houston, TX 77061 Date of Evaluation: 03/11/91

Tel: (713) 947-9292
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

142

Revision Date: November 14, 1997

Heath Consultants, Inc.

Petro Comp

VOLUMETRIC TANK TIGHTNESS TEST METHOD (OVERFILL)

Certification: Leak rate of 0.1 gph with PD = 99% and PFA = 0.98%.

Leak Threshold: 0.05 gph. A tank system should not be declared tight if the test result indicates a loss 

or gain that equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel, solvents, alcohols, water.

Tank Capacity: Maximum of 15,000 gallons.

Tank must be minimum 100% full.

An automatic product leveler must be used to maintain a constant product level during 

test.

Waiting Time: None between delivery and testing.

There must be no dispensing or delivery during waiting time.

Test Period: Minimum of 2 hours after the completion of the high level circulation.

Test data are acquired and recorded by a computer after the completion of the high 

level circulation.

Leak rate is calculated based on cumulative volume change during low level test 

(generally based on 1 hour average volume change).

Product must be mixed continuously throughout test period.

There must be no dispensing or delivery during test.

Temperature: Average for product is determined by a single temperature sensor.

Groundwater: Depth to groundwater in backfill must be determined. If groundwater is above bottom 

of tank, product level must be adjusted to provide a minimum net pressure of 4 psi at 

bottom of tank during test.

Calibration: Temperature sensor is self calibrating.

Level sensor must be checked annually and calibrated if necessary in accordance with 

manufacturer's instructions.

Comments: Not evaluated using manifold tank systems.

Heath Consultants, Inc. Evaluator: Ken Wilcox Associates

9030 Monroe Rd. Tel: (816) 443-2494

Houston, TX 77061 Date of Evaluation: 12/15/90

Tel: (713) 947-9292
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

143

Revision Date: November 14, 1997

Heath Consultants, Inc.

Petro Tite II

VOLUMETRIC TANK TIGHTNESS TEST METHOD (OVERFILL)

Certification: Leak rate of 0.1 gph with PD = 99% and PFA = 1%.

Leak Threshold: 0.05 gph. A tank system should not be declared tight if the test result indicates a loss 

or gain that equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel, fuel oil #4.

Tank Capacity: Maximum of 15,000 gallons.

Tank must be minimum 100% full. 

An automatic product leveler must be used to maintain a constant product level 

during test.

Waiting Time: None between delivery and testing.

There must be no dispensing or delivery during waiting time.

Test Period: Minimum of 2 hours.

Test data are acquired and recorded manually.

Leak rate calculated based on cumulative volume change during low level test 

(generally based on 1 hour average volume change).

Product must be mixed continuously throughout test period.

There must be no dispensing or delivery during test.

Temperature: Average for product is determined by a single DTS-2000 digital sensor.

Groundwater: Depth to groundwater in backfill must be determined. If groundwater is above bottom 

of tank, product level must be adjusted to provide a minimum net pressure of 4 psi at 

bottom of tank during test.

Calibration: Sensor calibration must be checked at each use and the DTS-2000 recertified a 

minimum of once every 3 years.

Comments: Not evaluated using manifold tank systems.

Heath Consultants, Inc. Evaluator: Ken Wilcox Associates

9030 Monroe Rd. Tel: (816) 443-2494

Houston, TX 77061 Date of Evaluation: 11/01/90

Tel: (713) 947-9292
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

144

Revision Date: September 11, 1998

Horner EZY CHECK

EZY-Chek Manual Line Leak Detector

LINE TIGHTNESS TEST METHOD

Certification: Leak rate of 0.1 gph with PD = 98.0% and PFA = 1%.

Leak Threshold: 0.05 gph. A pipeline system should not be declared tight if the test result indicates 

a loss that equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel, fuel oil #4, waste oil, solvents.

Specification: System tests fiberglass and steel pipelines.

Tests are conducted at 150% operating pressure.

Mechanical line leak detector must be removed from pipeline for duration of test.

Pipeline Capacity: Maximum of 129 gallons.

Waiting Time: None between delivery and testing.

None between dispensing and testing.

Test Period: Minimum of 1 hour, 30 minutes.

Data are collected every 15 minutes.

Testing period consists of a monitor mode and test mode.

Data are collected in the monitor mode until two consecutive records are within 0.01 

gallon of each other.

Four data points must be taken in test mode for a final gph result.

Test data are acquired and recorded manually.

Manual calculations performed by the operator on site.

Calibration: No temperature sensors used. 

No calibration required. 

System must be checked annually in accordance with manufacturer's instructions.

Horner EZY CHECK Evaluator: Ken Wilcox Associates

719 Scheurmann St. Tel: (816) 443-2494

Essexville, MI 48732 Date of Evaluation: 07/09/92

Tel: (517) 891-9868
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

145

Revision Date: September 11, 1998

Horner EZY CHECK

EZY-Chek II Automatic Line Leak Detector

LINE TIGHTNESS TEST METHOD

Certification: Leak rate of 0.1 gph with PD = 99.0% and PFA = 1%.

Leak Threshold: 0.05 gph. A pipeline system should not be declared tight if the test result indicates 

a loss that equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel, fuel oil #4, waste oil, solvents.

Specification: System tests fiberglass and steel pipelines.

Tests are conducted at 150% operating pressure.

Pipeline Capacity: Maximum of 129 gallons.

Waiting Time: None between delivery and testing.

None between dispensing and testing.

Test Period: Minimum of 2 hours.

Data are collected every 30 seconds.

Testing period consists of a monitor mode and test mode.

Data are collected in monitor mode until two consecutive 15 minute records are 

within 0.01 gallon of each other. Then an additional 15 minutes is required in 

monitor mode before start of test mode.

Data are collected in test mode for 1 hour, 7 minutes.

Test data are acquired and recorded by a microprocessor.

Calculations are automatically performed by the microprocessor.

Calibration: Sensors must be calibrated before each test.

Horner EZY CHECK Evaluator: Ken Wilcox Associates

719 Scheurmann St. Tel: (816) 443-2494

Essexville, MI 48732 Date of Evaluation: 07/13/92

Tel: (517) 891-9868
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

146

Revision Date: September 11, 1998

Horner EZY CHECK

EZY 3

NON-VOLUMETRIC TANK TIGHTNESS TEST METHOD (VACUUM)

Certification: Leak rate of 0.1 gph with PD = 100% and PFA = 0%.

Leak Threshold: A tank system should not be declared tight when the vacuum decay is more than 1 inch water 

column pressure for non-volatile products and 10% of the lower determined vapor pressure 

for volatile products. 

A tank system should also not be declared tight if any water ingress is detected. 

Applicability: Gasoline, diesel, aviation fuel, fuel oils #4 and #6, waste oil, solvents.

Tank Capacity: Maximum of 12,000 gallons if groundwater is not present. 

Maximum of 50,000 gallons if groundwater is present and a vacuum of 1.0 to 1.7 psi can be 

maintained. 

For gasoline, ullage volume must be between 800 and 2,500 gallons. 

For diesel, ullage volume must be between 500 and 1,500 gallons.

Waiting Time: None between delivery and testing.

Test Period: Minimum of 2 hours, 30 minutes for gasoline (1 hour, 30 minutes vapor equilibrium 

recirculation time plus 1 hour test period). 

Minimum of 1 hour, 30 minutes for diesel and less volatile products (30 minutes vapor 

equilibrium recirculation time plus 1 hour test period). 

The vapor equilibrium recirculation time is the time required to apply a vacuum and to saturate 

ullage with vapors. 

Test data are acquired and recorded manually.

Test Pressure: Vacuum must be maintained between 1.0 to 1.7 psi at bottom of tank.

Vacuum must not be greater than 4.0 psi in ullage. 

Temperature: Vacuum decay is independent of product temperature.

Water Sensor: Conductivity water sensor must be used to detect water ingress and must be calibrated for 

every test.

Minimum detectable water level is 0.014 inch. 

Minimum detectable change in water level is 0.0095 inch. 

Minimum water level in tank must be adjusted to 0.014 inch before sensor calibration begins. 

Actual water ingress test period depends on tank size and must be calculated in accordance 

with manufacturer’s instructions, but must be a minimum of 1 hour.

Groundwater: Depth to groundwater in backfill must be determined. If groundwater is above bottom of tank,

water sensor must be used and test time extended to ensure water ingress detection during 

test.

Comments: Not evaluated using manifold tank systems.

Evaluated using gasoline and diesel.

Test may not be effective in some backfill (such as clay) because it may plug holes in tank. 

If soil is saturated with product, air or water ingress may not be detected by vacuum

test. A well point in backfill may help identify presence of this condition.

Horner EZY CHECK Evaluator: Ken Wilcox Associates

719 Scheurmann St. Tel: (816) 443-2494
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

147

Essexville, MI 48732 Dates of Evaluation: 08/23/94, 02/08/95

Tel: (517) 891-9868
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

148

Revision Date: September 11, 1998

Horner EZY CHECK

Horner EZY-Chek I

VOLUMETRIC TANK TIGHTNESS TEST METHOD (OVERFILL)

Certification: Leak rate of 0.1 gph with PD = 99% and PFA = 1%.

Leak Threshold: 0.05 gph. A tank system should not be declared tight if the test result indicates a loss 

or gain that equals or exceeds this threshold.

Applicability: Gasoline, diesel, aviation fuel, fuel oil #4, waste oil, solvents.

Tank Capacity: Maximum of 12,000 gallons.

Tank must be minimum 100% full.

Waiting Time: Minimum of 6 hours between delivery and testing. 

Minimum of 3 hours between "topping off" and testing.

Total minimum waiting time is 6 hours.

There must be no product dispensing or delivery during waiting time.

Test Period: Minimum of 1 hour, 30 minutes (30 minute monitor period, plus 1 hour test period). 

Testing must continue until data meets manufacturer's stop test criteria. 

Volume data are collected and recorded by a strip chart recorder. 

Leak rate is calculated from data of last 1 hour of test period.

There must be no dispensing or delivery during test.

Temperature: Average for product is determined by a resistance temperature detector (RTD) and 

displayed on an LCD readout.

Groundwater: Depth to groundwater in backfill must be determined. If groundwater is above bottom 

of tank, product level must be adjusted to provide net pressure of 2-4 psi at bottom of 

tank. 

Groundwater level must be stable prior to and during test.

Calibration: Level sensors must be calibrated before each test. 

Comments: Not evaluated using manifold tank systems.

Horner EZY CHECK Evaluator: W. A. Kibbe and Associates

719 Scheurmann St. Tel: (517) 797-2425

Essexville, MI 48732 Date of Evaluation: 10/03/90

Tel: (517) 891-9868
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

149

Revision Date: September 11, 1998

Horner EZY CHECK

Horner EZY-Chek II

VOLUMETRIC TANK TIGHTNESS TEST METHOD (OVERFILL)

Certification: Leak rate of 0.1 gph with PD = 99.95% and PFA = 0.05%.

Leak Threshold: 0.05 gph. A tank system should not be declared tight if the test result indicates a loss 

or gain that equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel, fuel oil #4, waste oil, solvents.

Tank Capacity: Maximum of 12,000 gallons.

Tank must be minimum 100% full.

Waiting Time: Minimum of 6 hours between delivery and testing.

Minimum of 3 hours between "topping off" and testing.

Total minimum waiting time is 6 hours.

There must be no delivery or dispensing during waiting time.

Test Period: Minimum of 1 hour, 40 minutes (33 minutes monitor mode and 1 hour, 7 minutes test 

mode). 

At the conclusion of test mode, data are checked for the manufacturer's stop 

test criteria. If data do not meet the criteria, testing must continue.

Test data are acquired and recorded by a computer.

Leak rate is calculated from last 1 hour, 7 minutes of test period data. 

There must be no dispensing or delivery during test.

Temperature: Average for product is determined by a resistance temperature detector (RTD).

Groundwater: Depth to groundwater in backfill must be determined. If groundwater is above bottom 

of tank, product level must be adjusted to provide net pressure of 2-4 psi at bottom of 

tank. 

Groundwater level must be stable prior to and during test. 

Calibration: Load cell must be calibrated before each use.

Comments: Not evaluated using manifold tank systems.

Horner EZY CHECK Evaluator: W. A. Kibbe and Associates

719 Scheurmann St. Tel: (517) 797-2425

Essexville, MI 48732 Date of Evaluation: 09/18/90

Tel: (517) 891-9868
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

150

Revision Date: September 11, 1998

Horner EZY CHECK

Horner EZY-Chek II

VOLUMETRIC TANK TIGHTNESS TEST METHOD (UNDERFILL)

Certification: Leak rate of 0.1 gph with PD = 95.79% and PFA = 4.21%.

Leak Threshold: 0.05 gph. A tank system should not be declared tight if the test result indicates a loss 

or gain that equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel, fuel oil #4, waste oil, solvents. 

Tank Capacity: Maximum of 12,000 gallons.

Tank must be between 98 and 100% full.

Waiting Time: Minimum of 8 hours between delivery and testing.

There must be no product dispensing or delivery during waiting time.

Test Period: Minimum of 1 hour, 40 minutes (33 minutes monitor mode and 1 hour, 7 minutes

test mode).

At the conclusion of test mode, data are checked for the manufacturer's stop test 

criteria. If data do not meet the criteria, testing must continue.

Test data are acquired and recorded by a computer.

Leak rate calculated from last 1 hour, 7 minutes of test period data.

There must be no dispensing or delivery during test.

Temperature: Average for product is determined by a resistance temperature detector (RTD).

Groundwater: Depth to groundwater in backfill must be determined. If groundwater is above 

bottom of tank, product level must be adjusted to provide a minimum net pressure of 1 

psi at bottom of tank during test. If this cannot be accomplished, then the tank cannot 

be tested using this system.

Calibration: Load cell must be calibrated before each use.

Comments: Not evaluated using manifold tank systems.

Tests only portion of tank containing product.

As product level is lowered, leak rate in a leaking tank decreases (due to lower head 

pressure). Consistent testing at low levels could allow a leak to remain undetected.

EPA leak detection regulations require testing of the portion of the tank system which 

routinely contains product.

Horner EZY CHECK Evaluator: W. A. Kibbe and Associates

719 Scheurmann St. Tel: (517) 797-2425

Essexville, MI 48732 Date of Evaluation: 06/25/90

Tel: (800) 443-0711
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

151

Revision Date: August 23, 1999

Horner Products Inc.

SIR PRO 1 Version 1.0

STATISTICAL INVENTORY RECONCILIATION TEST METHOD (QUALITATIVE)

Certification: Leak rate of 0.2 gph with PD = 100% and PFA = 0%. 

Leak Threshold: 0.1 gph. A tank system should not be declared tight if the test result indicates a 

loss or gain that equals or exceeds this threshold.

Applicability: Gasoline, diesel, aviation fuel, fuel oil #4.

Tank Capacity: Maximum of 18,000 gallons.

Data Requirement: Minimum of 30 days of product level and flow through data.

System Features: Method of data analysis that system employs, and was used during evaluation 

process, is exclusive of any external control by vendor.

System consists of a fully automated software package with embedded 

algorithms for conducting leak detection testing. Consequently, third party 

evaluation procedure demonstrated that system can be used in-house with no 

requirement for direct vendor participation.

Evaluation Features: Evaluator tested this system for in-house use. Computer program disk along with 

instructional documentation was supplied by vendor to evaluator. Evaluator, 

without vendor involvement, analyzed required data and performed evaluation 

using program disk and accompanying documentation. Vendor was present as 

an observer during evaluation.

Comments: Not evaluated using data from manifolded tanks.

Of 120 data sets submitted for evaluation, 10 were inconclusive.

Median monthly throughput of tanks evaluated was 13,640 gallons.

Leak rate of 0.2 gph was used in evaluation.

Data sets evaluated were supplied by evaluator.

Horner Products Inc. Evaluator: Petro Works

104 Little Killarney Beach Tel: (913) 681-9379

Bay City, MI 48706 Date of Evaluation: 04/07/93

Tel: (800) 443-0711
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

152

Revision Date: August 23, 1999

Horner Products Inc.

SIR PRO 1 Version 2.0

STATISTICAL INVENTORY RECONCILIATION TEST METHOD (QUALITATIVE)

Certification: Leak rate of 0.1 gph with PD = 100% and PFA = 0%.

Version 2.0 is designed to meet annual test requirements. 

Leak Threshold: 0.05 gph. A tank system should not be declared tight if the test result indicates 

a loss or gain that equals or exceeds this threshold.

Applicability: Gasoline, diesel, aviation fuel, fuel oil #4.

Tank Capacity: Maximum of 18,000 gallons.

Data Requirement: Minimum of 30 days of product level and flow through data.

System Features: Method of data analysis that system employs, and was used during evaluation 

process, is exclusive of any external control by vendor.

System consists of a fully automated software package with embedded 

algorithms for conducting leak detection testing. Consequently, third party 

evaluation procedure demonstrated that system can be used in-house with no 

requirement for direct vendor participation.

Evaluation Features: Evaluator tested this system for in-house use. Computer program disk along 

with instructional documentation was supplied by vendor to evaluator. Evaluator, 

without vendor involvement, analyzed required data and performed evaluation 

using program disk and accompanying documentation. Vendor was present as 

an observer during evaluation.

Comments: Not evaluated using data from manifold tank systems.

Of 120 data sets submitted for evaluation, 9 were inconclusive.

Median monthly throughput of tanks evaluated was 11,828 gallons.

Leak rate of 0.1 gph was used in evaluation.

Data sets evaluated were supplied by evaluator.

Horner Products Inc. Evaluator: Petro Works

104 Little Killarney Beach Tel: (913) 681-9379

Bay City, MI 48706 Date of Evaluation: 04/07/93

Tel: (800) 443-0711
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

153

Revision Date: September 11, 1998

Horner Products Inc.

SIR PRO 1 Version 3.0

STATISTICAL INVENTORY RECONCILIATION TEST METHOD (QUANTITATIVE)

Certification: Leak rate of 0.2 gph with PD > 99% and PFA < 1%.

Leak Threshold: 0.1 gph. A tank system should not be declared tight if the test result indicates a 

loss or gain that equals or exceeds this threshold.

Applicability: Gasoline, diesel, aviation fuel, fuel oil #4.

Tank Capacity: Maximum of 33,000 gallons for single tanks.

Size limits using an acceptable protocol for manifold tank systems have not been 

determined.

Data Requirement: Minimum of 30 days of product level and flow through data.

Comments: Not evaluated for manifold tank systems using an acceptable protocol.

73% of data sets were from manifold tank systems.

Of 41 data sets submitted for evaluation, 4 were inconclusive.

Median monthly throughput of tanks evaluated was 22,370 gallons.

Leak rates ranging from 0.05 to 0.216 gph were used in evaluation.

Data sets evaluated were supplied by evaluator.

Horner Products Inc. Evaluator: Ken Wilcox Associates

104 Little Killarney Beach Tel: (816) 443-2494

Bay City, MI 48706 Date of Evaluation: 04/07/93

Tel: (800) 443-0711
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

154

Revision Date: September 11, 1998

Horner Products Inc.

SIR PRO 1 Version 4.0

STATISTICAL INVENTORY RECONCILIATION TEST METHOD (QUANTITATIVE)

Certification: Leak rate of 0.1 gph with PD = 98% and PFA = 2%. 

Leak Threshold: 0.05 gph. A tank system should not be declared tight if the test result indicates a 

loss or gain that equals or exceeds this threshold.

Applicability: Gasoline, diesel, aviation fuel, fuel oil #4.

Tank Capacity: Maximum of 33,000 gallons for single tanks. Size limits using an acceptable 

protocol for manifold tank systems have not been determined.

Data Requirement: Minimum of 30 days of product level and flow through data.

Comments: Not evaluated for manifold tank systems using an acceptable protocol.

73% of data sets were from manifold tank systems.

Of 41 data sets submitted for evaluation, 4 were inconclusive.

Median monthly throughput of tanks evaluated was 22,370 gallons.

Leak rates ranging from 0.05 to 0.216 gph were used in evaluation.

Data sets evaluated were supplied by evaluator.

Horner Products Inc. Evaluator: Ken Wilcox Associates

212 Morton St. Tel: (816) 443-2494

104 Little Killarney Beach Date of Evaluation: 07/18/95

Tel: (800) 443-0711
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

155

Revision Date: September 11, 1998

HT Technologies, Inc.

Vakumatik Models V 60, V 70 Ex

PRESSURE/VACUUM INTERSTITIAL MONITOR

Certification: Leak rate of 0.1 gph with PD =100% and PFA =0%.

Leak Threshold: System alarms when liquid enters interstitial space and vacuum decreases 

(pressure increases) above 34 millibars.

Applicability: Gasoline, diesel. 

After consultation with the manufacturer, other liquids may be tested which are 

compatible with flexible liner.

Tank Capacity: Maximum of 20,000 gallons based on interstitial volume resulting when flexible liner 

is properly fitted and held in position against rigid tank wall.

No minimum product level during test.

Waiting Time: None between delivery and testing.

Test Period: Minimum of 120 hours.

Comments: System tests the interstitial space between a properly fitted and installed flexible 

liner inside a rigid tank, or between the rigid walls of a double-walled tank.

Flexible liner is held in position by maintaining a vacuum on interstitial space.

Interstitial space is tested continuously.

System allows for permeation of vapor from stored substance into interstitial space.

Vapor discharged from vacuum pump must meet applicable air quality standards.

System detects breaches in either flexible internal liner or rigid tank walls.

Reasonable temperature variations will not cause an alarm or missed detection.

HT Technologies Evaluator: Ken Wilcox Associates

4360 Brownsboro Rd. Tel: (816) 443-2494

Louisville, KY 40207 Date of Evaluation: 08/17/97

Tel: (888) 287-9595 Date of Revised Evaluation: 01/28/98
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

156

Revision Date: November 6, 1997

Ibex Industries

Ibex Precision Test System

VOLUMETRIC TANK TIGHTNESS TEST METHOD (OVERFILL)

Certification: Leak rate of 0.1 gph with PD = 99.5% and PFA = 0.5%.

Leak Threshold: 0.05 gph. A tank system should not be declared tight if the test result indicates a loss 

or gain that equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel, fuel oil #4, solvents.

Tank Capacity: Maximum of 18,000 gallons.

Tank must be between 92 and 100% full.

Waiting Time: Minimum of 12 hours between delivery and testing.

Minimum of 3 hours between "topping off" and testing.

There must be no product dispensing or delivery during waiting time.

Test Period: Minimum of 1 hour.

Test data are acquired and recorded by a computer. 

Leak rate calculated from data determined valid by statistical analysis.

There must be no dispensing or delivery during test.

Temperature: Average for product is determined by a minimum of 6 temperature sensors.

Groundwater: Depth to groundwater in backfill must be determined. If groundwater is above bottom 

of tank, product level must be adjusted to provide net pressure of 2-4 psi on bottom of 

tank during test.

Calibration: Level sensors must be calibrated before each test. 

Temperature sensors must be calibrated semi-annually.

Comments: Not evaluated using manifold tank systems.

Tests only portion of tank containing product.

Ibex Industries Evaluator: Applied Research Center

Moved and left no forwarding address Tel: (805) 664-2173

or phone number. Date of Evaluation: 01/18/91
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

157

Revision Date: November 6, 1997

INCON Intelligent Controls, Inc.

TS-LLD Line Leak Detector

AUTOMATIC ELECTRONIC LINE LEAK DETECTOR

Certification: Leak rate of 3 gph with PD = 100% and PFA = 0%.

Leak Threshold: 1.5 gph. A pipeline system should not be declared tight if the test result indicates a 

loss that equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuels, fuel oil #4.

Specification: System tests pressurized fiberglass and steel pipelines.

Tests are conducted at operating pressure.

Pipeline Capacity: Maximum of 163 gallons.

Waiting Time: None between delivery and testing.

None between dispensing and testing.

Test Period: Response time is 3 minutes.

Test data are acquired and recorded by a microprocessor.

Calculations are automatically performed by the microprocessor.

System Features: Permanent installation on pipeline.

Automatic testing of pipeline.

Preset threshold.

Single test to determine if pipeline is leaking.

Pump shutdown, numerical “fail” code display and LED alarm light activation 

if leak is declared.

Calibration: System must be checked annually in accordance with manufacturer’s instructions.

INCON Intelligent Controls, Inc. Evaluator: Ken Wilcox Associates

74 Industrial Park Rd. Tel: (816) 443-2494

Saco, ME 04072 Date of Evaluation: 07/06/95

Tel: (800) 872-3455
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

158

Revision Date: November 6, 1997

INCON Intelligent Controls, Inc.

TS-LLD Line Leak Detector

AUTOMATIC ELECTRONIC LINE LEAK DETECTOR

Certification: Leak rate of 0.2 gph with PD = 100% and PFA = 0%.

Leak Threshold: 0.1 gph. A pipeline system should not be declared tight if the test result indicates a 

loss that equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuels, fuel oil #4.

Specification: System tests pressurized fiberglass and steel pipelines.

Tests are conducted at operating pressure.

Pipeline Capacity: Maximum of 163 gallons.

Waiting Time: None between delivery and testing.

None between dispensing and testing.

Test Period: Response time is 50 minutes to 8 hours for rigid piping.

Test data are acquired and recorded by a microprocessor.

Calculations are automatically performed by the microprocessor.

System Features: Permanent installation on pipeline.

Automatic testing of pipeline.

Preset threshold.

Single test to determine if pipeline is leaking.

Pump shutdown, numerical “fail” code display and LED alarm light activation

if leak is declared.

Calibration: System must be checked annually in accordance with manufacturer’s instructions.

Comments: After 28 days have elapsed since the last passing monthly line leak test, system 

shuts off the submersible pump. 

System display will flash number of days since the last passing test. 

Operator may reset button to enable dispensing for a 24 hour period.

This procedure may be used for a maximum of 4 days. 

After 32 days have elapsed since last monthly test, system will disable dispensing 

and automatically initiate a test, and system will not authorize dispensing until a 

test is passed or system is serviced.

INCON Intelligent Controls, Inc. Evaluator: Ken Wilcox Associates

74 Industrial Park Rd. Tel: (816) 443-2494

Saco, ME 04072 Date of Evaluation: 07/06/95

Tel: (800) 872-3455
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

159

Revision Date: November 6, 1997

INCON Intelligent Controls, Inc.

TS-LLD Line Leak Detector

AUTOMATIC ELECTRONIC LINE LEAK DETECTOR

Certification: Leak rate of 0.1 gph with PD = 100% and PFA = 0%.

Leak Threshold: 0.05 gph. A pipeline system should not be declared tight if the test result indicates 

a loss that equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuels, fuel oil #4.

Specification: System tests pressurized fiberglass and steel pipelines.

Tests are conducted at operating pressure.

Pipeline Capacity: Maximum of 163 gallons.

Waiting Time: None between delivery and testing.

Minimum of 8 hours between dispensing and testing.

Test Period: Response time is 40 minutes.

Test data are acquired and recorded by a microprocessor.

Calculations are automatically performed by the microprocessor.

System Features: Permanent installation on pipeline.

Automatic testing of pipeline.

Preset threshold.

Single test to determine if pipeline is leaking.

Pump shutdown, numerical “fail” code display and LED alarm light activation 

if leak is declared.

Calibration: System must be checked annually in accordance with manufacturer’s instructions.

INCON Intelligent Controls, Inc. Evaluator: Ken Wilcox Associates

74 Industrial Park Rd. Tel: (816) 443-2494

Saco, ME 04072 Date of Evaluation: 07/06/95

Tel: (800) 872-3455
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

160

Revision Date: November 6, 1997

INCON Intelligent Controls, Inc.

TS-LLD Line Leak Detector 

(for Flexible Pipelines)

AUTOMATIC ELECTRONIC LINE LEAK DETECTOR

Certification: Leak rate of 3 gph with PD = 100% and PFA = 0%.

Leak Threshold: 1.5 gph. A pipeline system should not be declared tight if the test result indicates a 

loss that equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuels, fuel oil #4.

Specification: System tests flexible pipelines.

Tests are conducted at operating pressure.

Pipeline Capacity: Maximum of 49.6 gallons.

Waiting Time: None between delivery and testing.

None between dispensing and testing.

Test Period: Response time is 3 minutes.

Test data are acquired and recorded by a microprocessor.

Calculations are automatically performed by the microprocessor.

System Features: Permanent installation on pipeline.

Automatic testing of pipeline.

Preset threshold.

Single test to determine if pipeline is leaking.

Pump shutdown, numerical “fail” code display and LED alarm light activation 

if leak is declared.

Calibration: System must be checked annually in accordance with manufacturer’s instructions.

INCON Intelligent Controls, Inc. Evaluator: Ken Wilcox Associates

74 Industrial Park Rd. Tel: (816) 443-2494

Saco, ME 04072 Date of Evaluation: 07/06/95

Tel: (800) 872-3455
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

161

Revision Date: November 6, 1997

INCON Intelligent Controls, Inc.

TS-LLD Line Leak Detector 

(for Flexible Pipelines)

AUTOMATIC ELECTRONIC LINE LEAK DETECTOR

Certification: Leak rate of 0.2 gph with PD = 100% and PFA = 0%.

Leak Threshold: 0.1 gph. A pipeline system should not be declared tight if the test result indicates a 

loss that equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuels, fuel oil #4.

Specification: System tests flexible pipelines.

Tests are conducted at operating pressure.

Pipeline Capacity: Maximum of 49.6 gallons.

Waiting Time: None between delivery and testing.

None between dispensing and testing.

Test Period: Response time is 2 hours, 21 minutes.

Test data are acquired and recorded by a microprocessor.

Calculations are automatically performed by the microprocessor.

System Features: Permanent installation on pipeline.

Automatic testing of pipeline.

Preset threshold.

Single test to determine if pipeline is leaking.

Pump shutdown, numerical “fail” code display and LED alarm light activation 

if leak is declared.

Calibration: System must be checked annually in accordance with manufacturer’s instructions.

Comments: After 28 days have elapsed since the last passing monthly line leak test, system 

shuts off the submersible pump. 

System display will flash number of days since the last passing test. 

Operator may reset button to enable dispensing for a 24 hour period. 

This procedure may be used for a maximum of 4 days. 

After 32 days have elapsed since last monthly test, system will disable dispensing, 

and automatically initiate a test, and system will not authorize dispensing until a 

test is passed or system is serviced.

INCON Intelligent Controls, Inc. Evaluator: Ken Wilcox Associates

74 Industrial Park Rd. Tel: (816) 443-2494

Saco, ME 04072 Date of Evaluation: 07/06/95

Tel: (800) 872-3455
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

162

Revision Date: November 6, 1997

INCON Intelligent Controls, Inc.

TS-LLD Line Leak Detector 

(for Flexible Pipelines)

AUTOMATIC ELECTRONIC LINE LEAK DETECTOR

Certification: Leak rate of 0.1 gph with PD = 100% and PFA = 0%.

Leak Threshold: 0.05 gph. A pipeline system should not be declared tight if the test result indicates 

a loss that equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuels, fuel oil #4.

Specification: System tests flexible pipelines.

Tests are conducted at operating pressure.

Pipeline Capacity: Maximum of 49.6 gallons.

Waiting Time: None between delivery and testing.

Minimum of 8 hours between dispensing and testing.

Test Period: Response time is 50 minutes.

Test data are acquired and recorded by a microprocessor.

Calculations are automatically performed by the microprocessor.

System Features: Permanent installation on pipeline.

Automatic testing of pipeline.

Preset threshold.

Single test to determine if pipeline is leaking.

Pump shutdown, numerical “fail” code display and LED alarm light activation 

if leak is declared.

Calibration: System must be checked annually in accordance with manufacturer’s instructions.

INCON Intelligent Controls, Inc. Evaluator: Ken Wilcox Associates

74 Industrial Park Rd. Tel: (816) 443-2494

Saco, ME 04072 Date of Evaluation: 07/06/95

Tel: (800) 872-3455
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

163

Revision Date: September 11, 1998

INCON Intelligent Controls, Inc.

TS 1000, 1001, 2001 

(Magnetostrictive Probe)

AUTOMATIC TANK GAUGING METHOD

Certification: Leak rate of 0.2 gph with PD = 99.9% and PFA = 0.1%.

Leak Threshold: 0.1 gph. A tank system should not be declared tight if the test result indicates a loss 

or gain that equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel, fuel oil #4. 

Other liquids may be tested after consultation with the manufacturer.

Tank Capacity: Maximum of 15,000 gallons.

Tanks less than 95% full may be tested.

Minimum product level required based on tank diameter is as follows:

48" dia./min. 12"; 64" dia./min. 14"; 72"dia./min. 15"; 96" dia./min. 17.5";

126"dia./min. 21.5". For other diameters, see evaluation report.

Waiting Time: Minimum of 6 hours 1 minute between delivery and testing.

None between dispensing and testing.

There must be no delivery during waiting time

Test Period: Length of the test is determined automatically based on quality of test data.

Average data collection time during evaluation was 5 hours 10 minutes.

Test data are acquired and recorded by a microprocessor.

Leak rate is calculated from data determined to be valid by statistical analysis.

There must be no dispensing or delivery during the test.

Temperature: Probe contains 5 thermistors to monitor product temperature. At least one thermistor 

must be submerged in product during testing. 

Water Sensor: Must be used to detect water ingress.

Minimum detectable water level in the tank is 0.208 inch.

Minimum detectable water level change is 0.011 inch.

Calibration: Thermistors and probe must be checked and calibrated in accordance with 

manufacturer's instructions.

Comments: Not evaluated using manifold tank systems.

Tests only portion of tank containing product.

As product level is lowered, leak rate in a leaking tank decreases (due to lower head 

pressure). Consistent testing at low levels could allow a leak to remain undetected.

EPA leak detection regulations require testing of the portion of the tank system which 

routinely contains product.

TS1000 and 1001 can support up to 4 tanks. TS2001can support up to 8 tanks.

INCON Intelligent Controls, Inc. Evaluator: Ken Wilcox Associates

74 Industrial Park Rd. Tel: (816) 443-2494

Saco, ME 04072 Dates of Evaluation: 08/05/92, 09/05/97

Tel: (800) 872-3455
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

164

Revision Date: May 29, 1998

INCON Intelligent Controls, Inc.

TS 1000, 1001, 2001 

(Magnetostrictive Probe)

AUTOMATIC TANK GAUGING METHOD

Certification: Leak rate of 0.1 gph with PD = 99.9% and PFA = 0.1%.

Leak Threshold: 0.05 gph. A tank system should not be declared tight if the test result indicates a loss 

or gain that equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel, fuel oil #4. 

Other liquids may be tested after consultation with the manufacturer.

Tank Capacity: Maximum of 15,000 gallons.

Tanks less than 95% full may be tested.

Minimum product level required based on tank diameter is as follows: 

48" dia./min. 12"; 64" dia./min. 14"; 72"dia./min. 15"; 96" dia./min. 17.5"; 

126"dia./min. 21.5". For other diameters, see evaluation report.

Waiting Time: Minimum of 5 hours 18 minutes between delivery and testing.

None between dispensing and testing.

There must be no delivery during waiting time.

Test Period: Length of the test is determined automatically based on quality of test data.

Average data collection time during evaluation was 5 hours 44 minutes.

Test data are acquired and recorded by a microprocessor.

Leak rate is calculated from data determined to be valid by statistical analysis.

There must be no dispensing or delivery during the test.

Temperature: Probe contains 5 thermistors to monitor product temperature. At least one thermistor 

must be submerged in product during testing. 

Water Sensor: Must be used to detect water ingress.

Minimum detectable water level in the tank is 0.208 inch.

Minimum detectable water level change is 0.011 inch.

Calibration: Thermistors and probe must be checked and calibrated in accordance with 

manufacturer's instructions.

Comments: Not evaluated using manifold tank systems.

Tests only portion of tank containing product.

As product level is lowered, leak rate in a leaking tank decreases (due to lower head 

pressure). Consistent testing at low levels could allow a leak to remain undetected.

EPA leak detection regulations require testing of the portion of the tank system which 

routinely contains product.

TS1000 and 1001 can support up to 4 tanks. TS2001 can support up to 8 tanks.

INCON Intelligent Controls, Inc. Evaluator: Ken Wilcox Associates

74 Industrial Park Rd. Tel: (816) 443-2494

Saco, ME 04072 Date of Evaluation: 09/05/97

Tel: (800) 872-3455
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

165

Revision Date: September 11, 1998

INCON Intelligent Controls, Inc.

TS 1000, 1001, 2001

(Incon LL2 Magnetostrictive Probe)

AUTOMATIC TANK GAUGING METHOD

Certification: Leak rate of 0.2 gph with PD = 95.7% and PFA = 4.3%.

Leak Threshold: 0.1 gph. A tank system should not be declared tight if the test result indicates a loss or 

gain that equals or exceeds this threshold.

Applicability: Gasoline, diesel, aviation fuel, fuel oil #4.

Other liquids may be tested after consultation with the manufacturer.

Tank Capacity: Maximum of 30,000 gallons.

Tanks less than 95% full may be tested.

Minimum product level required based on tank diameter as follows: 

48" dia./min. 12"; 64" dia./min. 14"; 72"dia./min. 15"; 96" dia./min. 17.5";

126"dia./min. 21.5". For other diameters, see evaluation report. 

Waiting Time: Minimum of 4 hours 9 minute between delivery and testing.

Minimum of 2 hours between dispensing and testing.

There must be no delivery during waiting time.

Test Period The length of the test is determined automatically based on quality of test data.

Average data collection time during the evaluation was 6 hours, 51 minutes.

Test data is acquired and recorded by a computer.

Leak rate is calculated from data determined to be valid by statistical analysis.

There must be no dispensing or delivery during the test.

Temperature: Probe contains 5 thermistors to monitor product temperature. At least one thermistor 

must be submerged in product during testing.

Water Sensor: Must be used to detect water ingress.

Minimum detectable water level in the tank is 0.208 inches.

Minimum detectable water level change is 0.011 inch.

Calibration: Thermistors and probe must be checked and calibrated in accordance with 

manufacturer's instructions.

Comments: This equipment was not evaluated using manifolded tanks.

Tests only the portion of the tank containing product.

As product level is lowered, the leak rate in a leaking tank decreases (due to lower head 

pressure). Consistent testing at low levels could allow a leak to remain undetected. 

EPA leak detection regulations require testing of the portion of the tank system which 

routinely contains product.

TS1000 and 1001 can support up to 4 tanks. TS2001can support up to 8 tanks.

INCON Intelligent Controls, Inc. Evaluator: Ken Wilcox Associates

74 Industrial Park Rd. Tel: (816) 443-2494

Saco, ME 04072 Date of Evaluation: 05/14/98

Tel: (800) 872-3455
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

166

Revision Date: September 11, 1998

INCON Intelligent Controls, Inc.

TS 2000

(Magnetostrictive Probe)

AUTOMATIC TANK GAUGING METHOD

Certification: Leak rate of 0.2 gph with PD = 99.9% and PFA = 0.5%. 

Leak Threshold: 0.058 gph. A tank system should not be declared tight if the test result indicates a 

loss or gain that equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel, fuel oil, waste oil. 

Other liquids may be tested after consultation with the manufacturer.

Tank Capacity: Maximum of 15,000 gallons.

Tank must be between 50 and 95% full.

Waiting Time: Minimum of 6 hours between delivery and testing.

Minimum of 2 hours between dispensing and testing.

There must be no delivery during waiting time.

Test Period: Minimum of 3 hours. 

Test data are acquired and recorded by a computer.

Leak rate is calculated from data determined to be valid by statistical analysis.

There must be no dispensing or delivery during test.

Temperature: Average for product is determined by a minimum of 5 resistance temperature 

detectors (RTDs).

Water Sensor: Must be used to detect water ingress.

Minimum detectable water level in the tank is 1.04 inches.

Minimum detectable water level change is 0.011 inch.

Calibration: RTDs and probe must be checked and calibrated in accordance with manufacturer's 

instructions.

Comments: Not evaluated using manifold tank systems.

Tests only portion of tank containing product.

As product level is lowered, leak rate in a leaking tank decreases (due to lower head 

pressure). Consistent testing at low levels could allow a leak to remain undetected.

EPA leak detection regulations require testing of the portion of the tank system which 

routinely contains product.

TS 2000 can support up to 4 tanks.

INCON Intelligent Controls, Inc. Evaluator: Ken Wilcox Associates

74 Industrial Park Rd. Tel: (816) 443-2494

Saco, ME 04072 Date of Evaluation: 05/10/91

Tel: (800) 872-3455
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

167

Revision: August 23, 1999

INCON Intelligent Controls, Inc.

Tank Sentinel TS-1000EFI

TSP-DIS BriteSensor

and

Tank Sentinel TS-1000/TS-2000

TSP-EIS Standard Sensor, TSP-PS Liquid Contact Sensor

LIQUID-PHASE INTERSTITIAL DETECTOR

Detector:

Output type: qualitative

Sampling frequency: continuous

Operating principle: opto-electric

Test Results:

unleaded synthetic diesel heating

TSP-DIS BriteSensor gasoline gasoline fuel oil #2 water

Detection time (min:sec) 03:13 03:17 3:00 3:02 03:18

Fall time (min) <1 <1 <1 <1 <1

Lower Detection Limit (cm)

 Product activation height 1.60 N/D* N/D N/D 1.92

TSP-EIS Standard Sensor

Detection time (min:sec) 03:01 03:17 3:00 3:02 03:07

Fall time (min) <1 <1 <1 <1 <1

Lower Detection Limit (cm)

 Product activation height 1.50 N/D N/D N/D N/D

TSP-PS Liquid Contact Sensor

Detection time (min:sec) 01:14 01:13 01:10 01:16 01:25

Fall time (min) <1 <1 <1 <1 <1

Lower Detection Limit (cm)

 Product activation height 1.37 N/D N/D N/D N/D

* See glossary.

Comments:

TSP-DIS BriteSensor was evaluated with Tank Sentinel TS-1000EFI.

TSP-EIS Standard Sensor and TSP-PS Liquid Contact Sensor were evaluated with Tank Sentinel

TS-1000/TS-2000.

Sensors are reusable

INCON Intelligent Controls, Inc. Evaluator: Carnegie Mellon Research Institute

74 Industrial Park Rd. Tel: (412) 268-3495

Saco, ME 04072 Dates of Evaluation: 12/09/94, 01/30/96,

Tel: (800) 872-3455 07/02/93
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

168

Revision Date: August 23, 1999

INCON Intelligent Controls, Inc.

Tank Sentinel TS-1000EFI

TSP-HIS BriteSensor

and

Tank Sentinel TS-1000/TS-2000

TSP-HLS Standard Sensor, TSP-ULS Standard Sensor

LIQUID-PHASE INTERSTITIAL DETECTOR

Detector:

Output type: qualitative

Sampling frequency: continuous

Operating principle: magnetic switch

Test Results:

TSP-HIS BriteSensor

50 % by weight 

ethylene glycol in water

30 % by weight

calcium chloride in water

up down up down

Response time (min:sec) 17:41 16:47 17:28 16:56

Recovery time (min) <1 <1 <1 <1

Lower Detection Limit (cm)

 Product activation height 19.56 2.53 19.40 2.50

TSP-HLS Stadard Sensor

unleaded

gasoline

synthetic

gasoline

diesel

fuel

heating oil 

#2 water

Detection time (min:sec) 10:09 10:14 09:55 10:25 09:25

Fall time (min) <1 <1 <1 <1 <1

Lower detection limit (cm)

 Product activation height 5.64 N/D* N/D N/D N/D

TSP-ULS Standard Sensor

Detection time (min:sec) 03:50 03:49 03:50 03:41 03:34

Fall time (min) <1 <1 <1 <1 <1

Lower detection limit (cm)

 Product activation height 2.70 N/D N/D N/D N/D

* See glossary.

Comments:

TSP-HIS BriteSensor is intended to monitor level of either ethylene glycol or calcium chloride solutions in 

interstitial or annular space of a double-walled tank. Activates if any significant gain or loss of solution 

occurs.

Sensors are reusable.

INCON Intelligent Controls, Inc. Evaluator: Carnegie Mellon Research Institute

74 Industrial Park Rd. Tel: (412) 268-3495

Saco, ME 04072 Date of Evaluations: 03/20/95, 01/30/96

Tel: (800) 872-3455
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

169

Revision Date: August 23, 1999

INCON Intelligent Controls, Inc.

Tank Sentinel TS-1000EFI

TSP-DDS BriteSensor, TSP-DTS BriteSensor, TSP-MWS BriteSensor Groundwater Probe

LIQUID-PHASE OUT-OF-TANK PRODUCT DETECTOR

Detector:

Output type: qualitative

Sampling frequency: continuous

Operating principle: magnetic switch and float (TSP-DDS, -DTS BriteSensor), and hydrocarbon sensitive 

polymer (all)

Test Results:

TSP-DDS BriteSensor

unleaded

gasoline

synthetic

gasoline

diesel

fuel

heating

oil #2

water

low level

water 

high level

Detection time (min:sec) 05:35 06:00 38:43 38:16 06:02 06:09

Fall time (min:sec) 34:27 28:53 > 60:00 > 60:00 <01:00 <01:00

Lower detection limits (cm)

 Product activation height 0.50 N/D* 3.16 N/D N/D N/D

 Product thickness on water 0.04 N/D N/D N/D N/D N/D

TSP-DTS BriteSensor

Detection time (min:sec) 06:02 05:59 38:43 38:16 06:02 06:13

Fall time (min:sec) 22:28 28:53 <01:00 <01:00 > 60:00 > 60:00

Lower detection limits (cm)

 Product activation height 0.50 N/D 3.16 N/D N/D N/D

 Product thickness on water 0.04 N/D N/D N/D N/D N/D

TSP-MWS BriteSensor 

Groundwater Probe

Detection time (min:sec) 10:13 06:42

Fall time (min:sec) 26:52 14:43

Lower detection limit (cm)

 Product thickness on water 0.04 0.04

* See glossary.

Specificity Results (additional for TSP-MWS BriteSensor Groundwater Probe):

Activated: n-hexane, diesel fuel, jet-A fuel, toluene, xylene(s).

Comments:

Sensors are reusable.

INCON Intelligent Controls, Inc. Evaluator: Carnegie Mellon Research Institute

74 Industrial Park Rd. Tel: (412) 268-3495

Saco, ME 04072 Dates of Evaluations: 12/09/94, 02/19/96
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

170

Tel: (800) 872-3455
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

171

Revision Date: September 11, 1998

Keekor Environmental Products

TankTite Leak Detection Kernel Version 1.0 with Keeprobe K7

(Magnetostrictive Probe)

AUTOMATIC TANK GAUGING METHOD

Certification: Leak rate of 0.2 gph with PD = 95.4% and PFA = 4.6%. 

Leak Threshold: 0.1 gph. A tank system should not be declared tight if the test result indicates a loss 

or gain that equals or exceeds this threshold.

Applicability: Gasoline, diesel, aviation fuel, fuel oils #4 and #6, waste oil, solvents.

Tank Capacity: Maximum of 15,000 gallons.

Tank must be between 50 and 90% full.

Waiting Time: Minimum of 8 hours, 6 minutes between delivery and testing.

Minimum of 15 minutes after a maximum dispensing rate of 50 gallons per minute.

There must be no delivery during waiting time.

Test Period: Minimum of 3 hours. 

Test data are acquired and recorded by a computer.

Leak rate is calculated as the average of subsets of all data collected.

There must be no dispensing or delivery during test.

Temperature: Average for product is determined by a minimum of 5 resistance temperature 

detectors (RTDs).

Water Sensor: Must be used to detect water ingress.

Minimum detectable water level in the tank is 0.41 inch.

Minimum detectable water level change is 0.0013 inch.

Calibration: Execution of Probe Check diagnostic routine is recommended prior to leak detect 

tests to ensure sensor is fully operational and in calibration. 

Annual preventative maintenance should be performed per manufacturer’s instructions.

Comments: Not evaluated using manifold tank systems.

Tests only portion of tank containing product.

As product level is lowered, leak rate in a leaking tank decreases (due to lower head 

pressure). Consistent testing at low levels could allow a leak to remain undetected.

EPA leak detection regulations require testing of the portion of the tank system which 

routinely contains product.

Keekor Environmental Products Evaluator: Arizona State University

14806 N. 74th St. Tel: (602) 965-3185

Scottsdale, AZ 85267-4830 Date of Evaluation: 10/25/94

Tel: (602) 443-0001
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

172

Revision Date: November 6, 1997

Leak Detection Systems, Inc.

Tank Auditor, Version RTD V.2.16

VOLUMETRIC TANK TIGHTNESS TEST METHOD (OVERFILL)

Certification: Leak rate of 0.1 gph with PD = 99.98% and PFA = 0.02%.

Leak Threshold: 0.05 gph. A tank system should not be declared tight if the test result indicates a loss 

or gain that equals or exceeds this threshold, except as noted below. 

If using two level testing, the level is changed by 3 feet between the two tests and a 

tank system should not be declared tight if the net change between the two tests is 

greater than 0.02 gph.

Applicability: Gasoline, diesel, aviation fuel, fuel oil #4, waste oil, solvents. 

Other liquids may be tested after consultation with the manufacturer.

Tank Capacity: Maximum of 15,000 gallons.

Tank must be minimum 100% full.

Waiting Time: Minimum is variable depending on site conditions, but not be less than 6 hours 

between delivery and testing.

Minimum of 1 hour between "topping off" and testing.

There must be no dispensing or delivery during waiting time.

Test Period: Minimum of 1 hour.

Test data are acquired and recorded by a computer.

Leak rate calculated from data determined to be valid by statistical analysis.

There must be no dispensing or delivery during test.

Temperature: Average for product is determined by a temperature averaging probe.

Groundwater: If depth to groundwater cannot be determined, two tests must be performed with a level 

change of at least 3 feet between tests. If depth to groundwater in backfill can be 

determined and it is above bottom of the tank, product level must be adjusted to 

provide height differential of 3 feet between product and groundwater in backfill during 

test. 

Calibration: Temperature averaging probe and level sensors must be calibrated before each test.

Comments: Not evaluated using manifold tank systems.

Evaluation of system did not include a field evaluation of groundwater compensation 

by two level testing.

Leak Detection Systems, Inc. Evaluator: Ken Wilcox Associates

106 Longwater Dr. Tel: (816) 443-2494

Norwell, MA 02061 Date of Evaluation: 11/29/91

Tel: (617) 878-7766
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

173

Revision Date: August 23, 1999

Mallory Controls

Pollulert Probes MD221G/T, MD221G/TRA, MD241R, MD241RRA, MD241G, MD241GRA

LIQUID-PHASE OUT-OF-TANK PRODUCT DETECTOR

Detector:

Output type: qualitative

Sampling frequency: continuous

Operating principle: electrical conductivity

Test Results:

MD221G/T, MD221G/TRA* unleaded gasoline synthetic gasoline JP-4 jet fuel

Detection time (sec) 4 7 2

Fall time (sec) 3 4 4

Lower detection limit (cm) 0.08-0.32 0.08-0.32 0.08-0.32

MD241R, MD241RRA, 

MD241G, MD241GRA**

Detection time (sec) 2 2 1

Fall time (sec) 1 2 2

Lower detection limit (cm) 0.16-0.32 0.16-0.32 0.16-0.32

*Evaluation was conducted using probe FD221G/TRA.

**Evaluation was conducted using probe FD241R.

Specificity Results (in addition to above):

Activated: n-hexane, diesel fuel, jet-A fuel, toluene, xylene(s).

Comments:

According to manufacturer, probes beginning with "MD" have identical performance as older probes 

beginning with "FD." 

Sensors are reusable.

Detectors have been discontinued by manufacturer.

Mallory Controls Evaluator: Radian Corp.

2831 Waterfront Pkwy. E. Dr. Tel: (512) 454-4797

Indianapolis, IN 46214 Date of Evaluation: 07/08/91

Tel: (317) 328-4000
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

174

Revision Date: April 18, 1997

Mallory Controls

Pollulert Probes MD221V, MD221VRA, MD210V, MD210VRA

VAPOR-PHASE OUT-OF-TANK PRODUCT DETECTOR

Detector:

Output type: qualitative

Sampling frequency: continuous

Operating principle: adsistor

Test Results:

unleaded gasoline synthetic gasoline JP-4 jet fuel

Detection time (sec) 91 65 86

Fall time (min:sec) 5:39 4:23 9:38

Lower detection limit (ppm) 10 to 100 10 to 500 10 to 50

Specificity Results (in addition to above):

Activated: toluene, xylene(s).

Not Activated: n-hexane.

Comments:

Evaluation was conducted using probe FD221V. 

According to manufacturer, probes beginning with “MD” have identical performance as older probes 

beginning with “FD.” 

Detector has been discontinued by manufacturer.

Mallory Controls Evaluator: Radian Corp.

2831 Waterfront Pkwy. E. Dr. Tel: (512) 454-4797

Indianapolis, IN 46214 Date of Evaluation: 07/08/91

Tel: (317) 328-4000
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

175

Revision Date: June 2, 1997

Marley Pump Co.

Red Jacket PPM 4000, RLM 9000

AUTOMATIC ELECTRONIC LINE LEAK DETECTOR

Certification: Leak rate of 3.0 gph with PD = 100% and PFA = 0%. 

Leak Threshold: 2.0 gph. A pipeline system should not be declared tight if the test result indicates a 

loss that equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel, solvents, methanol, ethanol, gasoline blends with 

methanol and ethanol.

Specification: System tests pressurized fiberglass and steel pipelines.

Tests are conducted at 5-10 psi.

Pipeline Capacity: Maximum of 55.1 gallons.

Waiting Time: None between delivery and testing.

None between dispensing and testing.

Test Period: Response time is 2 minutes.

Test data are acquired and recorded by a microprocessor.

Calculations are automatically performed by the microprocessor.

System Features: Permanent installation on pipeline.

Automatic testing of pipeline.

Preset threshold.

Single test to determine if pipeline is leaking.

Recording and display of day, date, and time of conclusive test.

Pump shutdown, message display, and alarm activation if leak is declared.

Calibration: System must be checked annually and calibrated if necessary in accordance with 

manufacturer's instructions.

Comments: PPM 4000 is a stand alone automatic electronic line leak detector.

RLM 9000 is a combination of RLM 5000 automatic tank gauge and PPM 4000 

automatic electronic line leak detector.

Marley Pump Co. Evaluator: Ken Wilcox Associates

9650 Alden Street Tel: (816) 443-2494

Lenexa, KS 66215 Date of Evaluation: 03/07/91

Tel: (888) 262-7539 Date of Revised Evaluation: 04/94
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

176

Revision Date: June 2, 1998

Marley Pump Co.

Red Jacket PPM 4000, RLM 9000

AUTOMATIC ELECTRONIC LINE LEAK DETECTOR

Certification: Leak rate of 0.2 gph with PD = 100% and PFA = 0%. 

Leak Threshold: 0.1 gph. A pipeline system should not be declared tight if the test result indicates a 

loss that equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel, solvents, methanol, ethanol, gasoline blends with 

methanol and ethanol.

Specification: System tests pressurized fiberglass and steel pipelines.

Tests are conducted at 5-10 psi.

Pipeline Capacity: Maximum of 55.1 gallons.

Waiting Time: None between delivery and testing.

None between dispensing and testing.

Test Period: Response time is 10 minutes to 3 hours.

Test data are acquired and recorded by a microprocessor.

Calculations are automatically performed by the microprocessor.

System Features: Permanent installation on pipeline.

Automatic testing of pipeline.

Preset threshold.

Single test to determine if pipeline is leaking.

Recording and display of day, date, and time of conclusive test.

Pump shutdown, message display, and alarm activation if leak is declared.

Calibration: System must be checked annually and calibrated if necessary in accordance with 

manufacturer's instructions.

Comments: PPM 4000 is a stand alone automatic electronic line leak detector.

RLM 9000 is a combination of RLM 5000 automatic tank gauge and PPM 4000 

automatic electronic line leak detector.

Marley Pump Co. Evaluator: Ken Wilcox Associates

9650 Alden Street Tel: (816) 443-2494

Lenexa, KS 66215 Date of Evaluation: 03/07/91

Tel: (888) 262-7539 Date of Revised Evaluation: 04/94
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

177

Revision Date: June 2, 1998

Marley Pump Co.

Red Jacket PPM 4000, RLM 9000

AUTOMATIC ELECTRONIC LINE LEAK DETECTOR

Certification: Leak rate of 0.1 gph with PD = 100% and PFA = 0%. 

Leak Threshold: 0.047 gph. A pipeline system should not be declared tight if the test result indicates 

a loss that equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel, solvents, methanol, ethanol, gasoline blends with 

methanol and ethanol.

Specification: System tests pressurized fiberglass and steel pipelines.

Tests are conducted at 5-10 psi.

Pipeline Capacity: Maximum of 55.1 gallons.

Waiting Time: None between delivery and testing.

None between dispensing and testing.

Test Period: Response time is 2 hours, 30 minutes to 3 hours.

Test data are acquired and recorded by a microprocessor.

Calculations are automatically performed by the microprocessor.

System Features: Permanent installation on pipeline.

Automatic testing of pipeline.

Preset threshold.

Single test to determine if pipeline is leaking.

Recording and display of day, date, and time of conclusive test.

Pump shutdown, message display, and alarm activation if leak is declared.

Calibration: System must be checked annually and calibrated if necessary in accordance with 

manufacturer's instructions.

Comments: PPM 4000 is a stand alone automatic electronic line leak detector.

RLM 9000 is a combination of RLM 5000 automatic tank gauge and PPM 4000 

automatic electronic line leak detector.

Marley Pump Co. Evaluator: Ken Wilcox Associates

9650 Alden Street Tel: (816) 443-2494

Lenexa, KS 66215 Date of Evaluation: 03/07/91

Tel: (888) 262-7539 Date of Revised Evaluation: 04/94
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

178

Revision Date: June 2, 1998

Marley Pump Co.

Red Jacket PPM 4000, RLM 9000, ST 1401L, ST 1801L

(for Flexible Pipelines)

AUTOMATIC ELECTRONIC LINE LEAK DETECTOR

Certification: Leak rate of 0.2 gph with PD = 100% and PFA = 0%. 

Leak Threshold: 0.1 gph. A pipeline system should not be declared tight if the test result indicates a 

loss that equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel, solvents, methanol, ethanol, gasoline blends with 

methanol and ethanol.

Specification: System tests pressurized flexible pipelines.

Tests are conducted at 10 to 12 psi.

Pipeline Capacity: Maximum of 27.6 gallons.

Waiting Time: None between delivery and testing.

None between dispensing and testing.

Test Period: Response time is 9 minutes to 2 hours, 30 minutes.

Test data are acquired and recorded by a microprocessor.

Calculations are automatically performed by the microprocessor.

System Features: Permanent installation on pipeline.

Automatic testing of pipeline.

Preset threshold.

Single test to determine if pipeline is leaking.

Recording and display of day, date, and time of conclusive test.

Pump shutdown, message display, and alarm activation if leak is declared.

Calibration: System must be checked annually and calibrated if necessary in accordance with 

manufacturer's instructions.

Comments: PPM 4000 is a stand alone automatic electronic line leak detector.

RLM 9000 is a combination of RLM 5000 automatic tank gauge and PPM 4000 

automatic electronic line leak detector.

ST 1401L is a combination of ST 1400 automatic tank gauge and ST 1401L 

automatic electronic line leak detector.

ST 1801L is a combination ST1800 automatic tank gauge and ST 1801L automatic 

electronic line leak detector.

Marley Pump Co. Evaluator: Ken Wilcox Associates

9650 Alden Street Tel: (816) 443-2494

Lenexa, KS 66215 Date of Evaluation: 07/28/96

Tel: (888) 262-7539 Date of Revised Evaluation: 01/31/97
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

179

Revision Date: June 2, 1998

Marley Pump Co.

Red Jacket PPM 4000, RLM 9000, ST 1401L, ST 1801L

(for Flexible Pipelines)

AUTOMATIC ELECTRONIC LINE LEAK DETECTOR

Certification: Leak rate of 0.1 gph with PD = 100% and PFA = 0%. 

Leak Threshold: 0.05 gph. A pipeline system should not be declared tight if the test result indicates 

a loss that equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel oil #4, solvents, methanol, ethanol, gasoline blends 

with methanol and ethanol.

Specification: System tests pressurized flexible pipelines.

Tests are conducted at operating pressure to the equivalence of 45 psi.

Pipeline Capacity: Maximum of 27.6 gallons.

Waiting Time: None between delivery and testing.

None between dispensing and testing.

Test Period: Response time is 26 minutes to 4 hours.

Test data are acquired and recorded by a microprocessor.

Calculations are automatically performed by the microprocessor.

System Features: Permanent installation on pipeline.

Automatic testing of pipeline.

Preset threshold.

Single test to determine if pipeline is leaking.

Recording and display of day, date, and time of conclusive test.

Pump shutdown, message display, and alarm activation if leak is declared.

Calibration: System must be checked annually and calibrated if necessary in accordance with 

manufacturer's instructions.

Comments: PPM 4000 is a stand alone automatic electronic line leak detector.

RLM 9000 is a combination of RLM 5000 automatic tank gauge and PPM 4000 

automatic electronic line leak detector.

ST 1401L is a combination of ST 1400 automatic tank gauge and ST 1401L 

automatic line leak detector.

ST 1801L is a combination of ST 1800 automatic tank gauge and ST 1801L 

automatic line leak detector.

Marley Pump Co. Evaluator: Ken Wilcox Associates

9650 Alden Street Tel: (816) 443-2494

Lenexa, KS 66215 Date of Evaluation: 07/28/96

Tel: (888) 262-7539 Date of Revised Evaluation: 01/31/97
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

180

Revision Date: August 23, 1999

Marley Pump Co.

Red Jacket ST 1401L, ST 1801L, CPT, Pro-Link

AUTOMATIC ELECTRONIC LINE LEAK DETECTOR

Certification: Leak rate of 3.0 gph with PD = 100% and PFA = 0%. 

Leak Threshold: 1.5 gph. A pipeline system should not be declared tight if the test result indicates a 

loss that equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel, fuel oil, solvents, methanol, ethanol, gasoline blends 

with methanol and ethanol.

Specification: System tests pressurized fiberglass and steel pipelines.

Tests are conducted at 10-25 psi.

Pipeline Capacity: Maximum of 172 gallons.

Waiting Time: None between delivery and testing. 

None between dispensing and testing.

Test Period: Response time is 2 to 4 minutes.

Test data are acquired and recorded by a microprocessor. 

Calculations are automatically performed by the microprocessor.

System Features: Permanent installation on pipeline.

Automatic testing of pipeline.

Preset threshold.

Single test to determine if pipeline is leaking.

Recording and display of day, date, and time of conclusive test.

Pump shutdown, message display, and alarm activation if leak is declared.

Calibration: System must be checked annually and calibrated if necessary in accordance with 

manufacturer's instructions.

Comments: ST 1401L is a combination of ST 1400 automatic tank gauge and the ST 1401L 

automatic electronic line leak detector.

ST 1801L is a combination of ST 1800 automatic tank gauge and ST 1801L 

automatic electronic line leak detector.

CPT is an electronic line leak detector component.

Pro-Link is either a stand alone electronic automatic line leak detector, or a 

combination of and automatic tank gauge and an automatic electronic line leak 

detector.

Marley Pump Co. Evaluator: Ken Wilcox Associates

9650 Alden Street Tel: (816) 443-2494

Lenexa, KS 66215 Date of Evaluation: 12/16/96

Tel: (888) 262-7539
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

181

Revision Date: September 11, 1998

Marley Pump Co.

Red Jacket ST 1401L, ST 1801L, CPT, Pro-Link

AUTOMATIC ELECTRONIC LINE LEAK DETECTOR

Certification: Leak rate of 0.2 gph with PD = 100% and PFA = 0%. 

Leak Threshold: 0.1 gph. A pipeline system should not be declared tight if the test result indicates a 

loss that equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel, solvents, methanol, ethanol, gasoline blends with 

methanol and ethanol.

.

Specification: System tests pressurized fiberglass and steel pipelines.

Tests are conducted at operating pressure equivalent to 30 psi.

Pipeline Capacity: Maximum of 163 gallons.

Waiting Time: None between delivery and testing.

None between dispensing and testing.

Test Period: Response time is 2 minutes to 4 hours.

Test data are acquired and recorded by a microprocessor.

Calculations are automatically performed by the microprocessor.

System Features: Permanent installation on pipeline.

Automatic testing of pipeline.

Preset threshold.

Single test to determine if pipeline is leaking.

Recording and display of day, date, and time of conclusive test.

Pump shutdown, message display, and alarm activation if leak is declared.

Calibration: System must be checked annually and calibrated if necessary in accordance with 

manufacturer's instructions.

Comments: ST 1401L is a combination of ST 1400 automatic tank gauge and ST 1401L

automatic electronic line leak detector.

ST 1801L is a combination of ST 1800 automatic tank gauge and ST 1801L 

automatic electronic line leak detector.

CPT is an electronic line leak detector component.

Pro-Link is either a stand alone electronic automatic line leak detector, or a 

combination of an automatic tank gauge and an automatic electronic line leak 

detector.

Marley Pump Co. Evaluator: Ken Wilcox Associates

9650 Alden Street Tel: (816) 443-2494

Lenexa, KS 66215 Date of Evaluation: 07/28/96

Tel: (888) 262-7539 Date of Revised Evaluation: 01/31/97
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

182

Revision Date: November 14, 1997

Marley Pump Co.

Red Jacket ST 1401L, ST 1801L, CPT, Pro-Link

AUTOMATIC ELECTRONIC LINE LEAK DETECTOR

Certification: Leak rate of 0.1 gph with PD = 100% and PFA = 0%. 

Leak Threshold: 0.047 gph. A pipeline system should not be declared tight if the test result indicates 

a loss that equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel, solvents, methanol, ethanol, gasoline blends with 

methanol and ethanol.

Specification: System tests pressurized fiberglass and steel pipelines.

Tests are conducted at 10-20 psi.

Pipeline Capacity: Maximum of 163 gallons.

Waiting Time: None between delivery and testing.

None between dispensing and testing.

Test Period: Response time is 4 minutes to 4 hours, 45 minutes.

Test data are acquired and recorded by a microprocessor.

Calculations are automatically performed by the microprocessor.

System Features: Permanent installation on pipeline.

Automatic testing of pipeline.

Preset threshold.

Single test to determine if pipeline is leaking.

Recording and display of day, date, and time of conclusive test.

Pump shutdown, message display, and alarm activation if leak is declared.

Calibration: System must be checked annually and calibrated if necessary in accordance with 

manufacturer's instructions.

Comments: The ST 1401L is a combination of ST 1400 automatic tank gauge and ST 1401L 

automatic electronic line leak detector.

The ST 1801L is a combination of ST 1800 automatic tank gauge and ST 1801L 

automatic electronic line leak detector.

CPT is an electronic line leak detector component.

Pro-Link is either a stand alone electronic automatic line leak detector, or a 

combination of an automatic tank gauge and an automatic electronic line leak 

detector.

Marley Pump Co. Evaluator: Ken Wilcox Associates

9650 Alden Street Tel: (816) 443-2494

Lenexa, KS 66215 Date of Evaluation: 07/28/96

Tel: (888) 262-7539 Date of Revised Evaluation: 01/31/97
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

183

Revision Date: November 14, 1997

Marley Pump Co.

Red Jacket DLD, XLD

AUTOMATIC MECHANICAL LINE LEAK DETECTOR

Certification: Leak rate of 3.0 gph with PD = 100% and PFA = 0%.

Leak Threshold: 2.0 gph. A pipeline system should not be declared tight if the test result indicates a 

loss that equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel, solvents.

Specification: System tests pressurized fiberglass and steel pipelines.

Tests are conducted at 8-12 psi.

Pipeline Capacity: Maximum of 129 gallons.

Waiting Time: None between delivery and testing. 

None between dispensing and testing.

Test Period: Response time is 6 seconds.

System Features: Permanent installation on pipeline.

Automatic testing of pipeline.

Preset threshold.

Single test to determine if pipeline is leaking.

Restricted flow to dispenser if leak is declared.

Calibration: System must be checked annually and calibrated if necessary in accordance with 

manufacturer's instructions.

Marley Pump Co. Evaluator: Ken Wilcox Associates

9650 Alden Street Tel: (816) 443-2494

Lenexa, KS 66215 Date of Evaluation: 12/21/90

Tel: (888) 262-7539
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

184

Revision Date: August 23, 1999

Marley Pump Co.

Red Jacket FX1, FX2, FX1V, FX2V

AUTOMATIC MECHANICAL LINE LEAK DETECTOR

Certification: Leak rate of 3.0 gph with PD = 100% and PFA = 0%.

Leak Threshold: 2.0 gph. A pipeline system should not be declared tight if the test result indicates a 

loss that equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel, some solvents.

Specification: System tests pressurized fiberglass and steel pipelines. 

Tests are conducted at 8-12 psi. 

Pipeline Capacity: Maximum of 316 gallons (FX1, FX1V) and 362 gallons (FX2, FX2V).

Waiting Time: None between delivery and testing. 

None between dispensing and testing. 

Stabilization time up to 45 minutes may be required after dispensing when 

temperature extremes are present.

Test Period: Response time is less than 5 minutes.

System Features: Permanent installation on pipeline.

Automatic testing of pipeline.

Preset threshold.

Single test to determine if pipeline is leaking.

Restricted flow to dispenser if leak is declared.

Calibration: System must be checked annually and calibrated if necessary in accordance with 

manufacturer's instructions.

Marley Pump Co. Evaluator: Ken Wilcox Associates

9650 Alden Street Tel: (816) 443-2494

Lenexa, KS 66215 Date of Evaluation: 03/14/94

Tel: (888) 262-7539 Date of Revised Evaluation: 06/01/94
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

185

Revision Date: June 2, 1998

Marley Pump Co.

Red Jacket FX1, FX2, FX1V, FX2V Flexline 

(for Flexible Pipelines)

AUTOMATIC MECHANICAL LINE LEAK DETECTOR

Certification: Leak rate of 3.0 gph with PD = 100% and PFA = 0%.

Leak Threshold: 2.0 gph. A pipeline system should not be declared tight if the test result indicates a 

loss that equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel, some solvents.

Specification: System tests pressurized flexible pipelines.

Pipeline Capacity: Maximum of 49 gallons.

Waiting Time: None between delivery and testing. 

None between dispensing and testing. 

Test Period: Response time is less than 3 minutes. 

System Features: Permanent installation on pipeline.

Automatic testing of pipeline.

Preset threshold.

Single test to determine if pipeline is leaking.

Restricted flow to dispenser if leak is declared.

Calibration: System must be checked annually and calibrated if necessary in accordance with 

manufacturer's instructions.

Comments: Enviroflex pipeline with a bulk modulus* of 1,280 psi was used during this evaluation. 

To perform a valid test, time delays must be integrated into electronic dispensing 

equipment or retrofitted in junction box. Without this delay, there is no guarantee 

that a nozzle will be closed for sufficient time to allow leak detector to perform 

pipeline test and provide uninterrupted service.

*See glossary.

Marley Pump Co. Evaluator: Ken Wilcox Associates

9650 Alden Street Tel: (816) 443-2494

Lenexa, KS 66215 Date of Evaluation: 03/22/94

Tel: (888) 262-7539
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

186

Revision Date: June 2, 1998

Marley Pump Co.

Red Jacket FX1D, FX2D, FX2DV 

Installed in the Big-Flow

AUTOMATIC MECHANICAL LINE LEAK DETECTOR

Certification: Leak rate of 3.0 gph with PD = 100% and PFA = 0%.

Leak Threshold: 2.0 gph. A pipeline system should not be declared tight if the test result indicates a 

loss that equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel, solvents.

Specification: System tests pressurized fiberglass and steel pipelines.

Tests are conducted at operating pressure.

Pipeline Capacity: Maximum of 362 gallons.

Waiting Time: None between delivery and testing. 

None between dispensing and testing. 

Test Period: Response time is less than 3 minutes. 

System Features: Permanent installation on pipeline.

Automatic testing of pipeline.

Preset threshold.

Single test to determine if pipeline is leaking.

Restricted flow to dispenser if leak is declared.

Calibration: System must be checked annually and calibrated if necessary in accordance with 

manufacturer's instructions.

Marley Pump Co. Evaluator: Ken Wilcox Associates

9650 Alden Street Tel: (816) 443-2494

Lenexa, KS 66215 Date of Evaluation: 03/15/94

Tel: (888) 262-7539 Date of Revised Evaluation: 07/30/96
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

187

Revision Date: September 11, 1998

Marley Pump Co.

Red Jacket XLP

AUTOMATIC MECHANICAL LINE LEAK DETECTOR

Certification: Leak rate of 3.0 gph with PD = 100% and PFA =0%.

Leak Threshold: 2.0 gph. A pipeline system should not be declared tight if the test result indicates a 

loss that equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel, solvents.

Specification: System tests pressurized fiberglass and steel pipelines.

Tests are conducted at 15-22 psi.

Pipeline Capacity: Maximum of 129 gallons.

Waiting Time: None between delivery and testing.

None between dispensing and testing.

Test Period: Response time is 6 seconds.

System Features: Permanent installation on pipeline.

Automatic testing of pipeline.

Preset threshold.

Single test to determine if pipeline is leaking.

Restricted flow to dispenser if leak is declared.

Calibration: System must be checked annually and calibrated if necessary in accordance with 

manufacturer's instructions.

Marley Pump Co. Evaluator: Ken Wilcox Associates

9650 Alden Street Tel: (816) 443-2494

Lenexa, KS 66215 Date of Evaluation: 03/22/94

Tel: (888) 262-7539
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

188

Revision Date: June 2, 1998

Marley Pump Co.

Red Jacket XLP 

(for Flexible Pipelines)

AUTOMATIC MECHANICAL LINE LEAK DETECTOR

Certification: Leak rate of 3.0 gph with PD = 100% and PFA =0%.

Leak Threshold: 2.0 gph. A pipeline system should not be declared tight if the test result indicates a 

loss that equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel, solvents.

Specification: System tests pressurized flexible pipelines.

Tests are conducted at operating pressure.

Pipeline Capacity: Maximum of 48.9 gallons.

Waiting Time: None between delivery and testing.

None between dispensing and testing.

Test Period: Response time is less than 3 minutes.

System Features: Permanent installation on pipeline.

Automatic testing of pipeline.

Preset threshold.

Single test to determine if pipeline is leaking.

Restricted flow to dispenser if leak is declared.

Calibration: System must be checked annually and calibrated if necessary in accordance with 

manufacturer's instructions.

Marley Pump Co. Evaluator: Ken Wilcox Associates

9650 Alden Street Tel: (816) 443-2494

Lenexa, KS 66215 Date of Evaluation: 04/19/93

Tel: (888) 262-7539
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

189

Revision Date: August 23, 1999

Marley Pump Co.

Prolink System

RJE Probes # RE-400-094 thru 112-5

(Magnetostrictive Probes)

AUTOMATIC TANK GAUGING METHOD

Certification: Leak rate of 0.2 gph with PD = 99.95% and PFA = 0.005%.

Leak Threshold: -0.116 gph to declare a leak.

0.084 gph to declare a gain.

A tank system should not be declared tight if the test indicates a loss or gain that equals or 

exceeds the threshold.

Applicability: Gasoline, diesel fuel. 

Other liquids maybe tested after consultation with the manufacturer.

Tank Capacity: Maximum of 18,000 gallons.

Tanks less than 95% full may be tested. 

Minimum product level required is based on tank diameter as follows:

48" dia./ min. 16"; 64" dia./ min. 21"; 72" dia./ min. 24"; 126" dia./ min. 41".

For other diameters, see evaluation report. 

Waiting Time: Minimum of 13 hours 54 minutes between delivery and testing.

Minimum of 10 minutes between dispensing and testing.

There must be no delivery during waiting time.

Test Period: Minimum of 4 hours, 31 minutes.

Test data are acquired and recorded by the system's computer.

Leak rate is calculated from all the data collected during entire test period.

There must be no dispensing or delivery during testing.

Temperature: Probe contains 5 or more resistance temperature detectors (RTD's) to monitor product 

temperature.

At least one RTD must be submerged in product during testing.

Water Sensor: Must be used to detect water ingress.

Minimum detectable water level in the tank is 0.106 inches.

Minimum detectable change in water level is 0.058 inches.

Calibration: RTD's and probe must be checked and calibrated in accordance with manufacturer's 

instructions.

Comments: System has a bias of -0.016 gph.

Not evaluated using manifolded tank systems.

Tests only the portion of tank containing product.

As product level is lowered, leak rate in a leaking tank decreases (due to lower head 

pressure). Consistent testing at low levels could allow a leak to remain undetected.

EPA leak detection regulations require testing of the portion of the tank which routinely 

contains product.

Marley Pump Co. Evaluator: ADA Technologies, Inc.

9650 Alden Street Tel: (303) 792-5615
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

190

Lenexa, KS 66215 Date of Evaluation: 10/29/96

Tel: (888) 262-7539
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

191

Revision Date: August 23, 1999

Marley Pump Co.

Prolink System

RJE Probes # RE-400-094 thru 112-5

(Magnetostrictive Probes)

AUTOMATIC TANK GAUGING METHOD

Certification: Leak rate of 0.1 gph with PD =95.2% and PFA = 0.5%.

Leak Threshold: -0.065 gph to declare a leak.

0.035 gph to declare a gain.

A tank system should not be declared tight if the test indicates a loss or gain that equals or 

exceeds the threshold.

Applicability: Gasoline, diesel fuel. 

Other liquids maybe tested after consultation with the manufacturer.

Tank Capacity: Maximum of 18,000 gallons.

Tanks less than 95% full may be tested. 

Minimum product level required is based on tank diameter as follows:

48" dia./ min. 16"; 64" dia./ min. 21"; 72" dia./ min. 24"; 126" dia./ min. 41". 

For other diameters, see evaluation report. 

Waiting Time: Minimum of 13 hours 54 minutes between delivery and testing.

Minimum of 10 minutes between dispensing and testing.

There must be no delivery during waiting time.

Test Period: Minimum of 6 hours, 39 minutes.

Test data are acquired and recorded by the system's computer.

Leak rate is calculated from all the data collected during entire test period.

There must be no dispensing or delivery during testing.

Temperature: Probe contains 5 or more resistance temperature detectors (RTD's) to monitor product 

temperature.

At least one RTD must be submerged in product during testing.

Water Sensor: Must be used to detect water ingress.

Minimum detectable water level in the tank is 0.106 inches.

Minimum detectable change in water level is 0.058 inches.

Calibration: RTD's and probe must be checked and calibrated in accordance with manufacturer's 

instructions.

Comments: System has a bias of -0.015 gph.

Not evaluated using manifolded tank systems.

Tests only the portion of tank containing product.

As product level is lowered, leak rate in a leaking tank decreases (due to lower head 

pressure). Consistent testing at low levels could allow a leak to remain undetected.

EPA leak detection regulations require testing of the portion of the tank which routinely 

contains product.

Marley Pump Co. Evaluator: ADA Technologies, Inc.

9650 Alden Street Tel: (303) 792-5615
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

192

Lenexa, KS 66215 Date of Evaluation: 10/29/96

Tel: (888) 262-7539
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

193

Revision Date: November 14, 1997

Marley Pump Co.

Red Jacket ATM System, 

Version RLM 5000, 5001, and 9000

(Magnetostrictive Probe)

AUTOMATIC TANK GAUGING METHOD

Certification: Leak rate of 0.2 gph with PD = 100% and PFA = 0%. 

Leak Threshold: 0.1 gph. A tank system should not be declared tight if the test result indicates a loss 

or gain that equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel, solvents.

Tank Capacity: Maximum of 15,000 gallons.

Tank must be between 50 and 95% full.

Waiting Time: Minimum of 6 hours between delivery and testing.

There must be no dispensing or delivery during waiting time.

Test Period: Minimum of 3 hours.

Test data are acquired and recorded by a computer.

Leak rate is calculated from all data collected.

There must be no dispensing or delivery during test.

Temperature: Average for product is determined by a minimum of 5 temperature sensors.

Water Sensor: Must be used to detect water ingress.

Minimum detectable water level in the tank is 1.04 inches.

Minimum detectable water level change is 0.011 inch.

Calibration: Temperature sensors and probe must be checked and calibrated in accordance with 

manufacturer's instructions.

Comments: Not evaluated using manifold tank systems.

Tests only portion of tank containing product.

As product level is lowered, leak rate in a leaking tank decreases (due to lower 

head pressure). Consistent testing at low levels could allow a leak to remain 

undetected.

EPA leak detection regulations require testing of the portion of the tank system which 

routinely contains product.

Marley Pump Co. Evaluator: Ken Wilcox Associates

9650 Alden Street Tel: (816) 443-2494

Lenexa, KS 66215 Date of Evaluation: 04/02/91
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

194

Tel: (888) 262-7539
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

195

Revision Date: November 14, 1997

Marley Pump Co.

Sonic Technology (ST) 1400-1800 Series Tank Monitoring System

ATG Automatic Tank Gauging Monitor, LLM Series Liquid Level Monitor, FMS Fuel Management Monitor

(Ultrasonic Probe)

AUTOMATIC TANK GAUGING METHOD

Certification: Leak rate of 0.2 gph with PD = 100% and PFA = 0%. 

Leak Threshold: 0.1 gph. A tank system should not be declared tight if the test result indicates a loss 

or gain that equals or exceeds this threshold.

Applicability: Gasoline, diesel, aviation fuel, solvents.

Tank Capacity: Maximum of 18,000 gallons.

Tank must be between 50 and 95% full.

Waiting Time: Minimum of 10 hours between delivery and testing.

None between dispensing and testing.

There must be no delivery during waiting time.

Test Period: Minimum of 2 hours, 21 minutes. 

Test data are acquired and recorded by a computer.

Leak rate is calculated from all data collected.

There must be no dispensing or delivery during test.

Temperature: Average for product is determined by a variable number of temperature sensors

spaced at approximately 6-inch intervals.

Water Sensor: Must be used to detect water ingress.

Minimum detectable water level in the tank is 0.112 inch.

Minimum detectable water level change is 0.011 inch.

Calibration: Temperature sensors and probe must be checked and calibrated in accordance with 

manufacturer's instructions.

Comments: Not evaluated using manifold tank systems.

Tests only portion of tank containing product.

As product level is lowered, leak rate in a leaking tank decreases (due to lower head 

pressure). Consistent testing at low levels could allow a leak to remain undetected.

EPA leak detection regulations require testing of the portion of the tank system which 

routinely contains product.

System was previously known as LT1 Automatic Product Level Monitor and was 

manufactured by Level Tech, Inc. (purchased by Marley 9/91).

Marley Pump Co. Evaluator: ADA Technologies

9650 Alden Street Tel: (303) 792-5615

Lenexa, KS 66215 Date of Evaluation: 09/30/92

Tel: (888) 262-7539
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

196

Revision Date: November 14, 1997

Marley Pump Co.

Sonic Technology (ST) 1400-1800 Series Tank Monitoring System 

ATG Automatic Tank Gauging Monitor, LLM Series Liquid Level Monitor, FMS Fuel Management Monitor

(Ultrasonic Probe)

AUTOMATIC TANK GAUGING METHOD

Certification: Leak rate of 0.1 gph with PD = 99.9% and PFA = 0.01%. 

Leak Threshold: 0.05 gph. A tank system should not be declared tight if the test result indicates a loss 

or gain that equals or exceeds this threshold.

Applicability: Gasoline, diesel, aviation fuel, fuel oils #4 and #6, some solvents.

Tank Capacity: Maximum of 18,000 gallons.

Tank must be between 95 and 100% full.

Waiting Time: Minimum of 12 hours between delivery and testing.

None between dispensing and testing. 

There must be no delivery during waiting time.

Test Period: Minimum of 2 hours, 21 minutes. 

Test data are acquired and recorded by a computer.

Leak rate is calculated from all data collected.

There must be no dispensing or delivery during test.

Temperature: Average for product is determined by a variable number of temperature sensors

spaced at approximately 6-inch intervals.

Water Sensor: Must be used to detect water ingress.

Minimum detectable water level in the tank is 0.112 inch.

Minimum detectable water level change is 0.011 inch.

Calibration: Temperature sensors and probe must be checked and calibrated in accordance with 

manufacturer's instructions.

Comments: Not evaluated using manifold tank systems.

Tests only portion of tank containing product.

As product level is lowered, leak rate in a leaking tank decreases (due to lower head 

pressure). Consistent testing at low levels could allow a leak to remain undetected.

EPA leak detection regulations require testing of the portion of the tank system which 

routinely contains product.

System was previously known as LT1 Automatic Product Level Monitor and 

was manufactured by Level Tech, Inc. (purchased by Marley 9/91).

Marley Pump Co. Evaluator: ADA Technologies, Inc.

9650 Alden Street Tel: (303) 792-5615

Lenexa, KS 66215 Date of Evaluation: 09/25/92

Tel: (888) 262-7539
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

197

Revision Date: August 23, 1999

Marley Pump Co.

Red Jacket Electronics

RE400-179-5 to RE400-199-5 Combination High Level/Low Level Sensor,

RE400-042-5 Hydrostatic Sensor, Red Jacket PPM 4000 with Optical Liquid Discrimination Sensor

LIQUID-PHASE INTERSTITIAL DETECTOR

Detector:

Output type: qualitative

Sampling frequency: continuous

Operating principle: float switch (RE400-179-5 to RE400-199-5 Combination High Level/Low level 

sensor, RE400-042-5 Hydrostatic Sensor),

optical sensor (PPM 4000 with Optical Liquid Discrimination Sensor)

Test Results:

RE400-179-5 to RE400-199-5 

Combination High Level/Low unleaded gasoline diesel fuel water

Level Sensor high low high low high low

Detection time (sec) <1 <1 <1 <1 <1 <1

Fall time (sec) <1 <1 <1 <1 <1 <1

Lower detection limit (cm) N/D* 3.80 N/D 4.26 N/D 3.53

RE400-042-5 Hydrostatic Sensor 

Detection time (sec) <1 <1 <1 <1 <1 <1

Fall time (sec) <1 <1 <1 <1 <1 <1

Lower detection limit (cm) 30.42 4.93 30.22 4.61 29.93 4.19

PPM 4000 with Optical Liquid 

Discrimination Sensor

unleaded

gasoline

synthetic

fuel

diesel

fuel

heating

oil #2 water

Response time (min) 2.19 2.20 1.93 2.23 2.81

Recovery time (min) < 1 < 1 < 1 < 1 < 1

Product activation height (cm) 1.08 1.10 1.03 1.07 1.20

Lower detection limit (cm) 0.30 N/D N/D N/D N/D

 *See glossary.

Specificity:

Evaluator claims RE400-179-5 to RE400-199-5 Combination High Level/Low Level Sensor and RE400-042-

5 Hydrostatic Sensor will respond to any liquid once threshold has been exceeded.

Comments:

RE400-179-5 to RE400-199-5 Combination High Level/Low Level Sensor model numbers and high level 

detection limit vary with length of sensor.

PPM 4000 with Optical Liquid Discrimination Sensor evaluation lists all PPM, RLM, and ST models, 

including the Multiplexer Unit. However, evaluation procedures were performed using model PPM 4000. 

Sensors are reusable.

Marley Pump Co. Evaluator: Ken Wilcox Associates

9650 Alden Street Tel: (816) 443-2494

Lenexa, KS 66215 Dates of Evaluation: 06/01/95, 04/28/92

Tel: (888) 262-7539
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

198

Revision Date: November 14, 1997

Marley Pump Co.

Red Jacket Electronics

RE400-058-5, RE400-059-5, RE400-147-5, RE400-148-5 Overfill Sensor, RE400-111-5 Sump Sensor, 

RE400-203-5 Optical Liquid Discrimination Sensor, RE400-204-5 Dispenser Pan Monitor,

RE400-180-5 Liquid Refraction Sensor

LIQUID-PHASE INTERSTITIAL DETECTOR

Detector:

Output type: qualitative

Sampling frequency: continuous

Operating principle float switch (RE400-058-5, RE400-059-5, RE400-147-5, RE400-148-5 Overfill Sensor, 

RE400-111-5 Sump Sensor),

electrical conductivity and optical (RE400-203-5 Optical Liquid Discrimination Sensor),

conductive polymer (RE400-204-5 Dispenser Pan Monitor),

optical (RE400-180-5 Liquid Refraction Sensor)

Test Results:

RE400-058-5, RE400-059-5, RE400-147-5, 

RE400-148-5 Overfill Sensor unleaded 

gasoline

diesel fuel water

Detection time (sec) <1 <1 <1

Fall time (sec) <1 <1 <1

Lower detection limit (cm) 2.97 2.82 2.57

RE400-111-5 Sump Sensor

Detection time (sec) <1 <1 <1

Fall time (sec) <1 <1 <1

Lower detection limit (cm) 3.60 3.41 3.20

RE400-203-5

Optical Liquid Discrimination Sensor

Detection time (sec) <1 <1 <1

Fall time (sec) <1 <1 <1

Lower detection limit (cm) 1.17 1.12 1.10

RE400-204-5 Dispenser Pan Monitor

Detection time (hr:min:sec) <00:30:00 <02:00:00 <00:00:01

Fall time (hr:min:sec) <01:20:00 1-2 days <00:00:01

Lower detection limit (cm) 0.44 0.44 1.08

RE400-180-5 Liquid Refraction Sensor

Detection time (sec) <1 <1 <1

Fall time (sec) <1 <1 <1

Lower detection limit (cm) 1.17 1.12 1.10

Specificity Results (in addition to above):

Activated: synthetic gasoline, n-hexane, jet-A fuel, toluene, xylene(s).

Comments:

Evaluator claims sensors will respond to any liquid once threshold has been exceeded.

After exposure to diesel, RE400-204-5 Dispenser Pan Monitor reading may not return to pre-contaminated level.

Sensors are reusable. 

Marley Pump Co. Evaluator: Ken Wilcox Associates

9650 Alden Street Tel: (816) 443-2494
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

199

Lenexa, KS 66215 Date of Evaluation: 06/01/95

Tel: (888) 262-7539
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

200

Revision Date: August 23, 1999

Mass Technology Corp.

Precision Mass Measurement System (24 hour test)

BULK FIELD-CONSTRUCTED TANK TIGHTNESS TEST LEAK DETECTION METHOD

Certification: Leak rate is proportional to product surface area (PSA).

For tanks with PSA of 1,257 ft2 or less, leak rate is 0.1 gph with PD = 97.9% and PFA = 

2.1%. For tanks with larger PSA, leak rate equals [(PSA in ft2 ÷ 1,257 ft2) x 0.1 gph].

Example: For a tank with PSA = 2,000 ft2; leak rate = [(2,000 ft2 ÷ 1,257 ft2) x 0.1 gph] 

= 0.16 gph.

Calculated minimum detectable leak rate is 0.078 gph with PD = 95% and PFA = 5%.

Leak rate may not be scaled below 0.1 gph.

Leak Threshold: Leak threshold is proportional to product surface area (PSA).

For tanks with PSA of 1,257 ft2 or less, leak threshold is 0.05 gph. For tanks with 

larger PSA, leak threshold equals [(PSA in ft2 ÷ 1,257 ft2) x 0.05 gph].

Example: For a tank with PSA = 2,000 ft2; leak threshold = [(2,000 ft2 ÷ 1,257 ft2) x 

0.05 gph] = 0.08 gph.

A tank system should not be declared tight if the test result indicates a loss or gain 

that equals or exceeds the calculated leak threshold. 

Applicability: Gasoline, diesel, aviation fuel, fuel oil. Other liquids may be tested after consultation 

with the manufacturer.

Tank Capacity: Use limited to single field-constructed vertical tanks. 

Maximum product surface area (PSA) is 3,143 ft2 (approximately 63 ft diameter).

Performance not sensitive to product level.

Waiting Time: Minimum of 1 hour, 6 minutes after delivery or dispensing. Valve leaks and pump 

drain-back may mask a leak. Allow sufficient waiting time to minimize these effects. 

Waiting times during evaluation ranged from 62 minutes to 31 hours.

Test Period: Minimum of 24 hours.

There must be no dispensing or delivery during test.

Temperature: Measurement not required by this system.

Water Sensor: None. Water leaks are measured as increase in mass inside tank.

Calibration: Differential pressure sensor must be checked regularly in accordance with 

manufacturer's instructions.

Comments: Tests only portion of tank containing product.

As product level is lowered, leak rate in a leaking tank decreases (due to lower head 

pressure). Consistent testing at low levels could allow a leak to remain undetected.

Evaluated in a nominal 120,000 gallon, vertical underground tank with product surface 

area (PSA) of 1,257 ft2.

Mass Technology Corp. Evaluator: Ken Wilcox Associates

7 Cox Drive Tel: (816) 443-2494

Kilgore, TX 75662 Date of Evaluation: 03/25/98

Tel: (903) 986-3564
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

201

Revision Date: August 23, 1999

Mass Technology Corp.

Precision Mass Measurement System (48 hour test)

BULK FIELD-CONSTRUCTED TANK TIGHTNESS TEST LEAK DETECTION METHOD

Certification: Leak rate is proportional to product surface area (PSA).

For tanks with PSA of 6,082 ft2, leak rate is 0.294 gph with PD = 95% and PFA = 5%. 

For other tank sizes, leak rate equals [(PSA in ft2 ÷ 6,082 ft2) x 0.294 gph].

Example: For a tank with PSA = 4,000 ft2; leak rate = [(4,000 ft2 ÷ 6,082 ft2) x 0.294 

gph] = 0.19 gph.

Leak Threshold: Leak threshold is proportional to product surface area (PSA).

For tanks with PSA of 6,082 ft2, leak threshold is 0.147 gph. For other tank sizes, 

leak threshold equals [(PSA in ft2 ÷ 6,082 ft2) x 0.147 gph].

Example: For a tank with PSA = 4,000 ft2; leak threshold = [(4,000 ft2 ÷ 6,082 ft2) x 

0.147 gph] = 0.1gph.

A tank system should not be declared tight if the test result indicates a loss or gain 

that equals or exceeds the calculated leak threshold. 

Applicability: Gasoline, diesel, aviation fuel, fuel oil. Other liquids may be tested after consultation 

with the manufacturer.

Tank Capacity: Use limited to single field-constructed vertical tanks. 

Maximum product surface area (PSA) is 6,082 ft2 (approximately 88 ft diameter).

Performance not sensitive to product level.

Waiting Time: Minimum of 1 hour, 6 minutes after delivery or dispensing. Valve leaks and pump 

drain-back may mask a leak. Allow sufficient waiting time to minimize these effects. 

Waiting times during evaluation ranged from 62 minutes to 31 hours.

Test Period: Minimum of 48 hours.

There must be no dispensing or delivery during test.

Temperature: Measurement not required by this system.

Water Sensor: None. Water leaks are measured as increase in mass inside tank.

Calibration: Differential pressure sensor must be checked regularly in accordance with 

manufacturer's instructions.

Comments: Tests only portion of tank containing product.

As product level is lowered, leak rate in a leaking tank decreases (due to lower head 

pressure). Consistent testing at low levels could allow a leak to remain undetected.

Evaluated in a nominal 600,000 gallon, vertical underground tank with product surface 

area (PSA) of 6,082 ft2.

Mass Technology Corp. Evaluator: Ken Wilcox Associates

7 Cox Drive Tel: (816) 443-2494

Kilgore, TX 75662 Date of Evaluation: 03/25/98

Tel: (903) 986-3564
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

202

Revision Date: August 23, 1999

Mass Technology Corp.

Precision Mass Measurement System (72 hour test)

BULK FIELD-CONSTRUCTED TANK TIGHTNESS TEST LEAK DETECTION METHOD

Certification: Leak rate is proportional to product surface area (PSA).

For tanks with PSA of 14,200 ft2, leak rate is 0.638 gph with PD = 95% and PFA = 5%. 

For other tank sizes, leak rate equals [(PSA in ft2 ÷ 14,200 ft2) x 0.638 gph]. Example: 

For a tank with PSA = 20,000 ft2; leak rate = [(20,000 ft2 ÷ 14,200 ft2) x 0.638 gph] = 

0.898 gph.

Leak rate may not be scaled below 0.2 gph.

Leak Threshold: Leak threshold is proportional to product surface area (PSA).

For tanks with PSA of 14,200 ft2, leak threshold is 0.319 gph. For other tank sizes, 

leak threshold equals [(PSA in ft2 ÷ 14,200 ft2) x 0.319 gph].

Example: For a tank with PSA = 20,000 ft2; leak threshold = [(20,000 ft2 ÷ 14,200 ft2) 

x 0.319 gph] = 0.449 gph.

A tank system should not be declared tight if the test result indicates a loss or gain 

that equals or exceeds the calculated leak threshold. 

Applicability: Gasoline, diesel, aviation fuel, fuel oil. Other liquids may be tested after consultation 

with the manufacturer.

Tank Capacity: Use limited to single field-constructed vertical tanks larger than 50,000 gallons. 

Maximum product surface area (PSA) is 35,500 ft2 (approximately 213 ft diameter).

Performance not sensitive to product level.

Waiting Time: Minimum of 1 hour, 6 minutes after delivery or dispensing. Valve leaks and pump 

drain-back may mask a leak. Allow sufficient waiting time to minimize these effects. 

Waiting times during evaluation ranged from 8 minutes to 42.5 hours.

Test Period: Minimum of 72 hours.

There must be no dispensing or delivery during test.

Temperature: Measurement not required by this system.

Water Sensor: None. Water leaks are measured as increase in mass inside tank.

Calibration: Differential pressure sensor must be checked regularly in accordance with 

manufacturer's instructions.

Comments: Tests only portion of tank containing product.

As product level is lowered, leak rate in a leaking tank decreases (due to lower head 

pressure). Consistent testing at low levels could allow a leak to remain undetected.

Evaluated in a nominal 2,000,000 gallon, vertical underground tank with product 

surface area (PSA) of 14,200 ft2. 

Mass Technology Corp. Evaluator: Ken Wilcox Associates

7 Cox Drive Tel: (816) 443-2494

Kilgore, TX 75662 Date of Evaluation: 03/25/98

Tel: (903) 986-3564
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

203

Revision Date: August 23, 1999

Mine Safety Appliances

Tankgard 

P/N 481532

and

Tankgard VIII

P/N 488803

VAPOR-PHASE OUT-OF-TANK PRODUCT DETECTOR

Detector:

Output type: quantitative

Sampling frequency: continuous

Operating principle: metal oxide semiconductor

Test Results:

benzene 2-methylbutane

Detection time (sec) 5 16

Fall time (min:sec) 04:12 04:42

Lower detection limit (ppm) 12.5 12.5

Specificity Results (in addition to above):

Activated (100%): n-butane, n-hexane, 2-methylpentane, toluene, isobutane.

Manufacturer’s specifications:

Maximum Wire Distance: 500 ft using 18 AWG

Response Time: 30 seconds

Recovery Time: 1 minute maximum

Sensor Life: 2 year warranty

Mine Safety Appliances Evaluator: Carnegie Mellon Research Institution

P. O. Box 427 Tel: (412) 268-3495

Pittsburgh, PA 15230 Dates of Evaluation: 03/26/91, 03/28/91

Tel: (800) 672-4678
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

204

Revision Date: August 23, 1999

NESCO (formerly Arizona Instrument Corp.)

Encompass MTS IPAM #17-903

(Magnetostrictive Probe #17-9300)

AUTOMATIC TANK GAUGING METHOD

Certification: Leak rate of 0.2 gph with PD = 97.80% and PFA = 2.2%.

Leak Threshold: 0.1 gph. A tank system should not be declared tight if the test result indicates a loss 

or gain that equals or exceeds this threshold.

Applicability: Gasoline, diesel, aviation fuel, fuel oils #4 and #6, waste oil, solvents. 

Other liquids may be tested after consultation with the manufacturer.

Tank Capacity: Maximum of 15,000 gallons.

Tank must be between 50 and 95% full.

Waiting Time: Minimum of 3 hours between delivery and testing.

There must be no dispensing or delivery during waiting time.

Test Period: Minimum of 6 hours.

Test data are acquired and recorded by a computer.

Leak rate is calculated from data determined to be valid by statistical analysis.

There must be no dispensing or delivery during test.

Temperature: Average for product is determined by a minimum of 5 resistance temperature detectors 

(RTDs).

Water Sensor: Must be used to detect water ingress.

Minimum detectable water level in the tank is 1.29 inches.

Minimum detectable change in water level is 0.0034 inch.

Calibration: RTDs and probe must be checked and calibrated in accordance with manufacturer's 

instructions.

Comments: Not evaluated using manifold tank systems.

Tests only portion of tank containing product.

As product level is lowered, leak rate in a leaking tank decreases (due to lower head 

pressure). Consistent testing at low levels could allow a leak to remain undetected.

EPA leak detection regulations require testing of the portion of the tank system which 

routinely contains product.

Encompass software provides for remote access capabilities.

NESCO Evaluator: Ken Wilcox Associates

4720 South Ash Ave. Tel: (816) 443-2494

Tempe, AZ 85282 Date of Evaluation: 08/22/94

Tel: (800) 229-2930
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

205

Revision Date: August 23, 1999

NESCO (formerly Arizona Instrument Corp.)

Encompass USF IPAM #17-901

(Ultrasonic Probe #17-9100)

AUTOMATIC TANK GAUGING METHOD

Certification: Leak rate of 0.2 gph with PD = 99.94% and PFA = 2.06%.

Leak Threshold: 0.1 gph. A tank system should not be declared tight if the test result indicates a loss 

or gain that equals or exceeds this threshold.

Applicability: Gasoline, diesel, aviation fuel, fuel oils #4 and #6, waste oil, solvents. 

Other liquids may be tested after consultation with the manufacturer.

Tank Capacity: Maximum of 15,000 gallons.

Tank must be between 50 and 95% full.

Waiting Time: Minimum of 3 hours between delivery and testing.

There must be no dispensing or delivery during waiting time.

Test Period: Minimum of 6 hours.

Test data are acquired and recorded by a computer.

Leak rate is calculated from data determined to be valid by statistical analysis.

There must be no dispensing or delivery during test.

Temperature: Average for product is obtained by a single temperature sensor that measures change 

in ultrasonic wave velocity.

Water Sensor: Must be used to detect water ingress.

Minimum detectable water level in the tank is 1.86 inches.

Minimum detectable change in water level is 0.012 inch.

Calibration: Temperature sensor and probe must be checked and calibrated in accordance with 

manufacturer's instructions.

Comments: Not evaluated using manifold tank systems.

Tests only portion of tank containing product.

As product level is lowered, leak rate in a leaking tank decreases (due to lower head 

pressure). Consistent testing at low levels could allow a leak to remain undetected.

EPA leak detection regulations require testing of the portion of the tank system which 

routinely contains product.

Encompass software provides for remote access capabilities.

NESCO Evaluator: Ken Wilcox Associates

4720 South Ash Ave. Tel: (816) 443-2494

Tempe, AZ 85282 Date of Evaluation: 08/22/94

Tel: (800) 229-2930
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

206

Revision Date: August 23, 1999

NESCO (formerly Arizona Instrument Corp.)

Soil Sentry Liquid 330(17-330-A/17-330-B), TLM-830, ENCOMPASS APAM

Probes 17-141A, 17-142A, 17-143A, 17-144A

LIQUID-PHASE INTERSTITIAL DETECTOR

Detector:

Output type: qualitative

Sampling frequency: continuous

Operating principle: refraction

Test Results:

unleaded gasoline synthetic gasoline diesel fuel water

Detection time (sec) 3 3 N/D* N/D

Fall time manual reset manual reset N/D N/D

Lower detection limits (cm)

 17-141A 0.25 0.28 0.15 0.1

 17-142A 0.25 0.30 0.18 0.18

 17-143A 0.03 0.15 0.03 0.13

 17-144A 0.28 0.30 0.30 0.15

* See glossary.

Specificity Results (in addition to above):

Activated: n-hexane, jet-A fuel, toluene (Only 17-143A was tested with toluene), xylene(s).

 

Comments:

Detectors are listed as interstitial due to intended use. 

Sensors are reusable. 

Although ENCOMPASS APAM (Accessory Probe Access Module) was not included in evaluations, 

according to manufacturer, probes perform in the same manner when connected to any one of these 3 

systems.

NESCO Evaluator: Ken Wilcox Associates

4720 South Ash Ave. Tel: (816) 443-2494

Tempe, AZ 85282 Dates of Evaluation: 12/29/92, 01/08/93

Tel: (800) 229-2930
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

207

Revision Date: August 23, 1999

NESCO (formerly Arizona Instrument Corp.)

Soil Sentry Twelve-X

VAPOR-PHASE OUT-OF-TANK PRODUCT DETECTOR

Detector:

Output type: quantitative

Sampling frequency: continuous

Operating principle: metal oxide semiconductor

Test Results:

unleaded synthetic diesel JP-4 JP-5 JP-8

gasoline gasoline fuel*** jet fuel jet fuel jet fuel ***

Accuracy* (%) 170 120 N/D 120 N/D** N/D

Bias* (%) 60 8.0 -20 ppm 

@

50 ppm

1.8 N/D N/D

Precision* (%) 6.3 7.7 12 ppm 18 N/D N/D

Detection time (min:sec) 12:20 12:27 15:00 12:33 N/D 15:00

Fall time* (min:sec) 11:53 11:53 15:00 11:55 N/D 15:00

Lower detection limit 

(ppm)

150 140 10 60 92 <0.01 gal/hr

* For tests conducted with 1000 ppm of test gas.

** See glossary.

*** A limited number of tests were conducted to determine the response of the system to diesel fuel and 

 JP-8 jet fuel.

Specificity Results: 

percentages

unleaded gasoline 170

synthetic gasoline 110

n-hexane 110

JP-4 jet fuel 90

toluene 43

xylene( s) 22

Manufacturer’s specifications:

Calibration is recommended on an annual basis, or whenever the sensor or the main printed circuit board 

is replaced.

NESCO Evaluator: Radian Corp.

4720 South Ash Ave. Tel: (512) 454-4797

Tempe, AZ 85282 Dates of Evaluation: 12/28/90, 04/17/91

Tel: (800) 229-2930 Evaluator: Ken Wilcox Associates

Tel: (816) 443-2494
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

208

Date of Evaluation: 02/16/92
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

209

Revision Date: November 14, 1997

Omntec/Electro Levels Mfg., Inc.

OEL 8000

 (Magnetostrictive Probe)

AUTOMATIC TANK GAUGING METHOD

Certification: Leak rate of 0.2 gph with PD = 99.9% and PFA = 0.1%.

Leak Threshold: 0.1 gph. A tank system should not be declared tight if the test result indicates a loss 

or gain that equals or exceeds this threshold.

Applicability: Gasoline, diesel, aviation fuel, fuel oil #4, waste oil, solvents. 

Other liquids may be tested after consultation with the manufacturer.

Tank Capacity: Maximum of 15,000 gallons.

Tank must be between 50 and 95% full.

Waiting Time: Minimum of 6 hours, 30 minutes between delivery and testing. 

There must be no delivery during waiting time.

Test Period: Minimum of 4 hours. 

Test data are acquired and recorded by a computer. 

Leak rate is calculated from data determined to be valid by statistical analysis.

There must be no dispensing or delivery during test.

Temperature: Average for product is determined by a minimum of 5 thermistors.

Water Sensor: Must be used to detect water ingress.

Minimum detectable water level in the tank is 0.055 inch. 

Minimum detectable change in water level is 0.011 inch.

Calibration: Thermistors and probe must be checked and calibrated in accordance with 

manufacturer’s instructions.

Comments: Not evaluated using manifold tank systems.

Tests only portion of tank containing product.

As product level is lowered, leak rate in a leaking tank decreases (due to lower 

head pressure). Consistent testing at low levels could allow a leak to remain 

undetected.

EPA leak detection regulations require testing of the portion of the tank system which 

routinely contains product.

Omntec/Electro Levels Mfg., Inc. Evaluator: Ken Wilcox Associates

1993 Pond Rd. Tel: (816) 443-2494

Ronkonkoma, NY 11779 Date of Evaluation: 01/17/96
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

210

Tel: (516) 981-2001
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

211

Revision Date: November 14, 1997

Omntec/Electro Levels Mfg., Inc.

OEL 8000

 (Magnetostrictive Probe)

AUTOMATIC TANK GAUGING METHOD

Certification: Leak rate of 0.1 gph with PD = 97.8% and PFA = 2.2%.

Leak Threshold: 0.05 gph. A tank system should not be declared tight if the test result indicates a loss 

or gain that equals or exceeds this threshold.

Applicability: Gasoline, diesel, aviation fuel, fuel oil #4, waste oil, solvents. 

Other liquids may be tested after consultation with the manufacturer.

Tank Capacity: Maximum of 15,000 gallons.

Tank must be between 50 and 95% full.

Waiting Time: Minimum of 6 hours, 30 minutes between delivery and testing. 

There must be no delivery during waiting time.

Test Period: Minimum of 4 hours. 

Test data are acquired and recorded by a computer. 

Leak rate is calculated from data determined to be valid by statistical analysis.

There must be no dispensing or delivery during test.

Temperature: Average for product is determined by a minimum of 5 thermistors.

Water Sensor: Must be used to detect water ingress.

Minimum detectable water level in the tank is 0.055 inch. 

Minimum detectable change in water level is 0.011 inch.

Calibration: Thermistors and probe must be checked and calibrated in accordance with 

manufacturer’s instructions.

Comments: Not evaluated using manifold tank systems.

Tests only portion of tank containing product.

As product level is lowered, leak rate in a leaking tank decreases (due to lower 

head pressure). Consistent testing at low levels could allow a leak to remain 

undetected.

EPA leak detection regulations require testing of the portion of the tank system which 

routinely contains product.

Omntec/Electro Levels Mfg., Inc. Evaluator: Ken Wilcox Associates

1993 Pond Rd. Tel: (816) 443-2494

Ronkonkoma, NY 11779 Date of Evaluation: 01/17/96
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

212

Tel: (516) 981-2001
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

213

Revision Date: April 18, 1997

Omntec/Electro Levels Mfg., Inc.

L-LL-R-1, LS-ASC, PDS-ASC, PDWS-1, PDWF-1

LIQUID-PHASE INTERSTITIAL DETECTOR

Detector:

Output type: qualitative

Sampling frequency: continuous

Operating principle: refractive index of liquids (all), electrical conductivity (PDS-ASC, PDWS-1, and 

PDWF-1)

Test Results:

L-LL-R-1 (low level) unleaded gasoline diesel fuel water

Detection time (sec) < 1 < 1 < 1

Fall time (sec) < 1 < 1 < 1

Lower detection limit (cm) 6.63 6.53 6.45

L-LL-R-1 (high level)

Detection time (sec) < 1 < 1 < 1

Fall time (sec) < 1 < 1 < 1

Lower detection limit (cm) 21.7 21.8 21.7

LS-ASC , PDS-ASC

Detection time (sec) < 1 < 1 < 1

Fall time (sec) < 1 < 1 < 1

Lower detection limit (cm) 2.24 2.11 1.42

PDWS-1

Detection time (sec) < 1 < 1 < 1

Fall time (sec) < 1 < 1 < 1

Lower detection limit (cm) 1.93 1.85 1.63

PDWF-1

Detection time (sec) < 1 < 1 < 1

Fall time (sec) < 1 < 1 < 1

Lower detection limit (cm) 1.60 1.67 1.02

Specificity Results (in addition to above):

Activated: synthetic gasoline, n-hexane, jet-A fuel, toluene, xylene(s).

LS and PD series responds to any liquid with an index of refraction different than air.

PD series responds to any conducting liquid.

Comments:

Detectors are listed as interstitial due to intended use. 

Sensors are reusable. 

Omntec/Electro Levels Mfg., Inc. Evaluator: Ken Wilcox Associates

1993 Pond Rd. Tel: (816) 443-2494

Ronkonkoma, NY 11779 Date of Evaluation: 06/12/93

Tel: (516) 467-5787
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

214

Revision Date: April 18, 1997

One Plus Corp.

Leak Edge

Models 100-3001, 100-4001

LIQUID-PHASE OUT-OF-TANK PRODUCT DETECTOR

Detector:

Output type: qualitative

Sampling frequency: continuous

Operating principle: product permeable

Test Results:

unleaded gasoline synthetic gasoline

Detection time (min:sec) 5:41 5:14

Fall time (min:sec) 30:39 18:36

Lower detection limit (cm) 0.02 0.02

Specificity Results (in addition to above):

Activated: n-hexane, diesel fuel, jet-A fuel, toluene, xylene(s).

Manufacturer’s specifications:

Operating temperatures: Sensor is -40 degrees C to 74 degrees C; Monitor Module is -20 degrees C to 49 

degrees C.

Comments:

Sensors are reusable.

One Plus Corp. Evaluator: Underwriters Laboratories Inc.

3182 McArthur Blvd. Tel: (847) 272-8800

Northbrook, IL 60062 Date of Evaluation: 12/17/91

Tel: (847) 498-0955
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

215

Revision Date: November 14, 1997

Patriot Sensors and Controls Corp. (formerly MagneTek)

7021 Digital Tank Gauge

(7030 Series Magnetostrictive Probe)

AUTOMATIC TANK GAUGING METHOD

Certification: Leak rate of 0.2 gph with PD = 99.96% and PFA = 0.044%.

Leak Threshold: 0.1 gph. A tank system should not be declared tight if the test result indicates a loss 

or gain that equals or exceeds this threshold.

Applicability: Gasoline, diesel, aviation fuel, fuel oil #4, waste oil, solvents, other substances with a 

specific gravity >0.6 and a viscosity <1500 cp. 

Tank Capacity: Maximum of 15,000 gallons.

Tank must be between 50 and 95% full.

Waiting Time: Minimum of 2 hours between delivery and testing.

There must be no dispensing or delivery during waiting time.

Test Period: Minimum of 4 hours.

Test data are acquired and recorded by a 7021 controller (computer).

Leak rate calculated from data determined to be statistically valid.

There must be no dispensing or delivery during test.

Temperature: Average for product is determined by a minimum of 1 resistance temperature

detector (RTD).

Water Sensor: Must be used to detect water ingress.

Minimum detectable water level in the tank is 0.947 inch.

Minimum detectable water level change is 0.0254 inch.

Calibration: RTD and probe must be checked and calibrated in accordance with manufacturer's 

instructions.

Comments: Not evaluated using manifold tank systems.

Tests only portion of tank containing product.

As product level is lowered, leak rate in a leaking tank decreases (due to lower head 

pressure). Consistent testing at low levels could allow a leak to remain undetected.

EPA leak detection regulations require testing of the portion of the tank system which 

routinely contains product.

System may also be used to test at a minimum product height of 18 inches or a 14% 

full tank, whichever is higher, if the leak rate is set at 0.1 gallons per hour 

(PD = 95.34% and PFA = 4.66%).

Patriot Sensors and Controls Corp. Evaluator: Ken Wilcox Associates

1080 N. Crooks Rd. Tel: (816) 443-2494

Clawson, MI 48017-1097 Date of Evaluation: 02/07/91

Tel: (810) 435-0700
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

216

Revision Date: November 14, 1997

Patriot Sensors and Controls Corp. (formerly MagneTek)

7021 Digital Tank Gauge

(7030 Series Magnetostrictive Probe)

AUTOMATIC TANK GAUGING METHOD

Certification: Leak rate of 0.1 gph with PD = 95.34% and PFA = 4.66%.

Leak Threshold: 0.05 gph. A tank system should not be declared tight if the test result indicates a loss 

or gain that equals or exceeds this threshold.

Applicability: Gasoline, diesel, aviation fuel, fuel oil #4, waste oil, solvents, other substances with a 

specific gravity >0.6 and a viscosity <1500 cp.

Tank Capacity: Maximum of 15,000 gallons.

Tank must be between 50 and 95% full.

Waiting Time: Minimum of 8 hours between delivery and testing.

There must be no dispensing or delivery during waiting time.

Test Period: Minimum of 4 hours.

Test data are acquired and recorded by a 7021 controller (computer).

Leak rate calculated from data determined to be statistically valid.

There must be no dispensing or delivery during test.

Temperature: Average for product is determined by a minimum of 1 resistance temperature

detector (RTD).

Water Sensor: Must be used to detect water ingress.

Minimum detectable water level in the tank is 0.947 inch.

Minimum detectable water level change is 0.0254 inch.

Calibration: RTD and probe must be checked and calibrated in accordance with manufacturer's 

instructions.

Comments: Not evaluated using manifold tank systems.

Tests only portion of tank containing product.

As product level is lowered, leak rate in a leaking tank decreases (due to lower head 

pressure). Consistent testing at low levels could allow a leak to remain undetected.

EPA leak detection regulations require testing of the portion of the tank system which 

routinely contains product.

System may also be used to test a minimum product height of 18 inches or a 14% full 

tank, whichever is higher, if leak rate is set at 0.1 gph.

Patriot Sensors and Controls Corp. Evaluator: Ken Wilcox Associates

1080 N. Crooks Rd. Tel: (816) 443-2494

Clawson, MI 48017-1097 Date of Evaluation: 02/07/91

Tel: (810) 435-0700
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

217

Revision Date: November 14, 1997

Patriot Sensors and Controls Corp. (formerly MagneTek)

7021 Digital Tank Gauge

(7100 Series Magnetostrictive Probe)

AUTOMATIC TANK GAUGING METHOD

Certification: Leak rate of 0.2 gph with PD = 99.9% and PFA = 0.1%.

Leak Threshold: 0.1 gph. A tank system should not be declared tight if the test result indicates a loss 

or gain that equals or exceeds this threshold.

Applicability: Gasoline, diesel, aviation fuel, fuel oil #4, waste oil, solvents, other substances with a 

specific gravity > 0.6 and a viscosity < 1500 cp. 

Tank Capacity: Maximum of 15,000 gallons.

Tank must be between 50 and 95% full.

Waiting Time: Minimum of 2 hours between delivery and testing.

Minimum of 2 hours between dispensing and testing.

There must be no dispensing or delivery during waiting time.

Test Period: Minimum of 2 hours.

Test data are acquired and recorded by a computer.

Leak rate calculated from data determined to be valid by statistical analysis.

There must be no dispensing or delivery during test.

Temperature: Average for product is determined by a minimum of 5 thermistors.

Water Sensor: Must be used to detect water ingress.

Minimum detectable water level in the tank is 0.186 inch.

Minimum detectable water level change is 0.0048 inch.

Calibration: Thermistors and probe must be checked and calibrated in accordance with 

manufacturer's instructions.

Comments: Not evaluated using manifold tank systems.

Tests only portion of tank containing product.

As product level is lowered, leak rate in a leaking tank decreases (due to lower head 

pressure). Consistent testing at low levels could allow a leak to remain undetected.

EPA leak detection regulations require testing of the portion of the tank system which 

routinely contains product.

Patriot Sensors and Controls Corp. Evaluator: Ken Wilcox Associates

1080 N. Crooks Rd. Tel: (816) 443-2494

Clawson, MI 48017-1097 Date of Evaluation: 03/14/95

Tel: (810) 435-0700
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

218

Revision Date: November 14, 1997

Patriot Sensors and Controls Corp. (formerly MagneTek)

7021 Digital Tank Gauge

(7100 Series Magnetostrictive Probe)

AUTOMATIC TANK GAUGING METHOD

Certification: Leak rate of 0.1 gph with PD = 99.6% and PFA = 0.4%.

Leak Threshold: 0.05 gph. A tank system should not be declared tight if the test result indicates a loss 

or gain that equals or exceeds this threshold.

Applicability: Gasoline, diesel, aviation fuel, fuel oil #4, waste oil, solvents, other substances with a 

specific gravity >0.6 and a viscosity <1500 cp.

Tank Capacity: Maximum of 15,000 gallons.

Tank must be between 50 and 95% full.

Waiting Time: Minimum of 2 hours between delivery and testing.

Minimum of 2 hours between dispensing and testing.

There must be no dispensing or delivery during waiting time.

Test Period: Minimum of 6 hours.

Test data are acquired and recorded by a computer.

Leak rate calculated from data determined to be valid by statistical analysis.

There must be no dispensing or delivery during test.

Temperature: Average for product is determined by a minimum of 5 thermistors.

Water Sensor: Must be used to detect water ingress.

Minimum detectable water level in the tank is 0.186 inch.

Minimum detectable water level change is 0.0048 inch.

Calibration: Thermistors and probe must be checked and calibrated in accordance with 

manufacturer's instructions.

Comments: Not evaluated using manifold tank systems.

Tests only portion of tank containing product.

As product level is lowered, leak rate in a leaking tank decreases (due to lower head 

pressure). Consistent testing at low levels could allow a leak to remain undetected.

EPA leak detection regulations require testing of the portion of the tank system which 

routinely contains product.

Patriot Sensors and Controls Corp. Evaluator: Ken Wilcox Associates

1080 N. Crooks Rd. Tel: (816) 443-2494

Clawson, MI 48017-1097 Date of Evaluation: 03/14/95

Tel: (810) 435-0700
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

219

Revision Date: April 18, 1997

PermAlert

PAL-AT Models AT20C, AT50C, AT40K

PHL Hydrocarbon Sensor

LIQUID-PHASE INTERSTITIAL DETECTOR

Detector:

Output type: qualitative

Sampling frequency: continuous

Operating principle: electrical conductivity

Test Results:

unleaded gasoline

Response time (min) 1.13

Recovery time (min) 8.83

Product activation height (cm) 0.53

Lower detection limit (cm) 0.38

Specificity Results (in addition to above):

Activated: synthetic gasoline, diesel fuel, heating oil #2.

Not activated: water.

Comments:

Sensors are reusable.

PermAlert Evaluator: Carnegie Mellon Research Institute

7720 N. Lehigh Ave. Tel: (412) 268-3495

Niles, IL 60714-3491 Date of Evaluation: 02/05/92

Tel: (847) 966-2190
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

220

Revision Date: August 23, 1999

PermAlert

TankWatch Models PHM10, PHMS

Combination Hydrocarbon/Water Probe, Hydrocarbon Probe

LIQUID-PHASE INTERSTITIAL DETECTOR

Detector:

Output type: qualitative

Sampling frequency: continuous

Operating principle: electrical conductivi ty

Test Results:

Combination 

Hydrocarbon/Water Probe unleaded gasoline water

Response time (min) 0.30 <1

Recovery time (min) 1.97 1.68

Product activation height (cm) 0.18 0.80

Lower detection limit (cm) 0.56 1.93

Hydrocarbon Probe

Response time (min) 0.25

Recovery time (min) 2.33

Product activation height (cm) 0.17

Lower detection limit (cm) 0.38

Specificity Results (in addition to above):

Activated: synthetic gasoline, diesel fuel, heating oil #2.

Comments:

Sensors are reusable.

PermAlert Evaluator: Carnegie Mellon Research Institute

7720 N. Lehigh Ave. Tel: (412) 268-3495

Niles, IL 60714-3491 Date of Evaluation: 06/16/92

Tel: (847) 966-2190
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

221

Revision Date: August 23, 1999

PermAlert

PAL-AT Models AT20C, AT50C, AT40K

AGW Sensor Cable, TFH Hydrocarbon Sensor Cable

LIQUID-PHASE OUT-OF-TANK PRODUCT DETECTOR

Detector:

Output type: qualitative

Sampling frequency: continuous

Operating principle: impedance change

Test Results: 

unleaded gasoline

AGW Sensor Cable

1/3 MER

1348 ft.

2/3 MER

2644 ft.

MER

3982 ft.

Response time (min) 9.92 6.25 21.28

Recovery time (min) 1.0 1.0 1.0

Product activation height (cm) 2.03 1.13 5.00

Detection length (cm) 116.3 64.8 286.1

Lower detection limits (cm) 

 Product activation height N/D* N/D 5.1

 Detection length N/D N/D 295.6

TFH Hydrocarbon Sensor Cable

1/3 MER

1368 ft.

2/3 MER

2685 ft.

MER

4046 ft.

Response time (min) 3.40 7.48 16.21

Recovery time (min) >60 >60 >60

Product activation height (cm) 0.65 1.33 3.53

Detection length (cm) 27.7 56.8 150.4

Lower detection limits (cm)

 Product activation height N/D N/D 3.6

 Detection length N/D N/D 152.9

* See glossary.

Specificity Results (in addition to above):

Activated: synthetic gasoline, diesel fuel, heating oil #2, water (AGW Sensor Cable only).

Comments:

System can monitor interstitial spaces. 

Evaluations also covered quantitative leak location.

AGW Sensor Cable is reusable.

TFH Hydrocarbon Sensor Cable is not reusable.

PermAlert Evaluator: Carnegie Mellon Research Institute

7720 N. Lehigh Ave. Tel: (412) 268-3495

Niles, IL 60714-3491 Dates of Evaluation: 01/17/92, 02/11/92

Tel: (847) 966-2190
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

222

Revision Date: November 14, 1997

PermAlert

PAL-AT Models AT20C, AT50C, AT40K

with PHFW Hydrocarbon Probe and Type 1 or Type 2 Sensor

LIQUID-PHASE OUT-OF-TANK PRODUCT DETECTOR

Detector:

Output type: qualitative

Sampling frequency: continuous

Operating principle: product soluble

Test Results:

Type 1 Sensor unleaded gasoline synthetic gasoline

Detection time (sec) 24 9

Fall time N/A* N/A

Lower detection limit (cm) 0.01 0.01

Type 2 Sensor

Detection time (min:sec) 14:39 08:45

Fall time N/A N/A

Lower detection limit (cm) 0.01 0.01

* See glossary.

Specificity Results (in addition to above):

Activated: n-hexane, diesel fuel, jet-A fuel, toluene, xylene(s).

Manufacturer’s specifications:

Operating temperature range is 0 degrees F to 90 degrees F.

Comments:

Sensors are not reusable; sensor filament must be replaced after contact with hydrocarbons.

PermAlert Evaluator: Carnegie Mellon Research Institute

7720 N. Lehigh Ave. Tel: (412) 268-3495

Niles, IL 60714-3491 Date of Evaluation: 09/15/92

Tel: (847) 966-2190
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

223

Revision Date: November 14, 1997

Petro Vend, Inc.

Petrosonic III

(Version 4.05 Model 613, 4 inch, Magnetostrictive Probe)

AUTOMATIC TANK GAUGING METHOD

Certification: Leak rate of 0.2 gph with PD = 99.07% and PFA = 0.93%.

Leak Threshold: 0.1 gph. A tank system should not be declared tight if the test result indicates a loss 

or gain that equals or exceeds this threshold.

Applicability: Gasoline, diesel, aviation fuel, solvents.

Tank Capacity: Maximum of 15,000 gallons.

Tank must be between 50 and 95% full.

Waiting Time: Minimum of 12 hours between delivery and testing.

There must be no dispensing or delivery during waiting time.

Test Period: Minimum of 4 hours.

Test data are acquired and recorded by a computer.

Leak rate is calculated as the difference between the first and last data collected.

There must be no dispensing or delivery during test.

Temperature: Average for product is determined by a minimum of 5 resistance temperature

detectors (RTDs).

Water Sensor: Must be used to detect water ingress.

Minimum detectable water level in the tank is 0.92 inch.

Minimum detectable change in water level is 0.02 inch.

Calibration: RTDs and probe must be checked and calibrated in accordance with manufacturer's 

instructions.

Comments: Not evaluated using manifold tank systems.

Tests only portion of tank containing product.

As product level is lowered, leak rate in a leaking tank decreases (due to lower 

head pressure). Consistent testing at low levels could allow a leak to remain 

undetected.

EPA leak detection regulations require testing of the portion of the tank system which 

routinely contains product.

Petrosonic III version 4.04 is an older model automatic tank gauging system, 

which is no longer being manufactured.

Petro Vend, Inc. Evaluator: Underwriters Laboratories, Inc.

6900 Santa Fe Dr. Tel: (847) 272-8800

Hodgkins, IL 60525-9909 Date of Evaluation: 11/04/94
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

224

Tel: (708) 485-4200 
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

225

Revision Date: November 14, 1997

Petro Vend, Inc.

Site Sentinel Model II and III,

 (Model 613, 2 inch, Magnetostrictive Probe)

AUTOMATIC TANK GAUGING METHOD

Certification: Leak rate of 0.2 gph with PD = 96.55% and PFA = 3.45%.

Leak Threshold: 0.1 gph. A tank system should not be declared tight if the test result indicates a loss

or gain that equals or exceeds this threshold.

Applicability: Gasoline, diesel, aviation fuel, solvents.

Tank Capacity: Maximum of 15,000 gallons.

Tank must be between 50 and 95% full.

Waiting Time: Minimum of 12 hours between delivery and testing.

There must be no dispensing or delivery during waiting time.

Test Period: Minimum of 4 hours.

Test data are acquired and recorded by a computer. 

Leak rate is calculated as the difference between the first and last data collected.

There must be no dispensing or delivery during test.

Temperature: Average for product is determined by a minimum of 5 resistance temperature

detectors (RTDs).

Water Sensor: Must be used to detect water ingress.

Minimum detectable water level in the tank is 2.47 inches.

Minimum detectable change in water level is 0.037 inch.

Calibration: RTDs and probe must be checked and calibrated in accordance with manufacturer's 

instructions.

Comments: Not evaluated using manifold tank systems.

Tests only portion of tank containing product.

As product level is lowered, leak rate in a leaking tank decreases (due to lower 

head pressure). Consistent testing at low levels could allow a leak to remain 

undetected.

EPA leak detection regulations require testing of the portion of the tank system which 

routinely contains product.

Petro Vend, Inc. Evaluator: Underwriters Laboratories, Inc. 

6900 Santa Fe Dr. Tel: (847) 272-8800

Hodgkins, IL 60525-9909 Date of Evaluation: 11/04/94
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

226

Tel: (708) 485-4200 
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

227

Revision Date: November 14, 1997

Petro Vend, Inc.

Site Sentinel Model II and III,

(Model 613, 4 inch, Magnetostrictive Probe)

AUTOMATIC TANK GAUGING METHOD

Certification: Leak rate of 0.2 gph with PD = 99.82% and PFA = 0.18%.

Leak Threshold: 0.1 gph. A tank system should not be declared tight if the test result indicates a loss 

or gain that equals or exceeds this threshold.

Applicability: Gasoline, diesel, aviation fuel, solvents.

Tank Capacity: Maximum of 15,000 gallons.

Tank must be between 50 and 95% full.

Waiting Time: Minimum of 12 hours between delivery and testing.

There must be no dispensing or delivery during waiting time.

Test Period: Minimum of 2 hours.

Test data are acquired and recorded by a computer. 

Leak rate is calculated as the difference between the first and last data collected.

There must be no dispensing or delivery during test.

Temperature: Average for product is determined by a minimum of 5 resistance temperature

detectors (RTDs).

Water Sensor: Must be used to detect water ingress.

Minimum detectable water level in the tank is 0.92 inch.

Minimum detectable change in water level is 0.02 inch.

Calibration: RTDs and probe must be checked and calibrated in accordance with manufacturer's 

instructions.

Comments: Not evaluated using manifold tank systems.

Tests only portion of tank containing product.

As product level is lowered, leak rate in a leaking tank decreases (due to lower head 

pressure). Consistent testing at low levels could allow a leak to remain undetected.

EPA leak detection regulations require testing of the portion of the tank system which 

routinely contains product.

Petro Vend, Inc. Evaluator: Underwriters Laboratories, Inc. 

6900 Santa Fe Dr. Tel: (847) 272-8800

Hodgkins, IL 60525-9909 Date of Evaluation: 11/04/94

Tel: (708) 485-4200 
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

228

Revision Date: November 14, 1997

Petro Vend, Inc.

Site Sentinel Model II and III,

(Model 613, 4 inch, Magnetostrictive Probe)

AUTOMATIC TANK GAUGING METHOD

Certification: Leak rate of 0.1 gph with PD = 99.95% and PFA = 0.35%.

Leak Threshold: 0.06 gph. A tank system should not be declared tight if the test result indicates a loss 

or gain that equals or exceeds this threshold.

Applicability: Gasoline, diesel, aviation fuel, solvents.

Tank Capacity: Maximum of 15,000 gallons.

Tank must be minimum 90% full.

Waiting Time: Minimum of 12 hours between delivery and testing.

There must be no dispensing or delivery during waiting time.

Test Period: Minimum of 4 hours.

Test data are acquired and recorded by a computer. 

Leak rate is calculated as the difference between the first and last data collected.

There must be no dispensing or delivery during test.

Temperature: Average for product is determined by a minimum of 5 resistance temperature

detectors (RTDs).

Water Sensor: Must be used to detect water ingress.

Minimum detectable water level in the tank is 0.92 inch.

Minimum detectable change in water level is 0.02 inch.

Calibration: RTDs and probe must be checked and calibrated in accordance with manufacturer's 

instructions.

Comments: Not evaluated using manifold tank systems.

Tests only portion of tank containing product.

As product level is lowered, leak rate in a leaking tank decreases (due to lower 

head pressure). Consistent testing at low levels could allow a leak to remain 

undetected.

EPA leak detection regulations require testing of the portion of the tank system which 

routinely contains product.

Petro Vend, Inc. Evaluator: Underwriters Laboratories, Inc.

6900 Santa Fe Dr. Tel: (847) 272-8800

Hodgkins, IL 60525-9909 Date of Evaluation: 11/04/94
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

229

Tel: (708) 485-4200 
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

230

Revision Date: August 23, 1999

Petro Vend, Inc.

Petrosentry IV, Petrosentry VIII, SiteSentinel 

Liquid Sensor, Universal Sump Sensor, Universal Reservoir Sensor

LIQUID-PHASE INTERSTITIAL DETECTOR

Detector:

Output type: qualitative

Sampling frequency: continuous

Operating principle: thermal conductivity (Liquid Sensor),

float switch (Universal Sump Sensor, Universal Reservoir Sensor)

Test Results:

Liquid Sensor unleaded gasoline

Response time (min) 0.51

Recovery time (min) <1

Product activation height (cm) 0.35

Lower detection limit (cm) 0.76

Universal Sump Sensor

Response time (min) 8.32

Recovery time (min) <1

Product activation height (cm) 3.37

Lower detection limit (cm) 3.97

Universal Reservoir Sensor

50 % by weight

ethylene glycol in water

30 % by weight

calcium chloride in water

up down up down

Response time (min) 19.62 16.86 17.77 15.91

Recovery time (min) <1 <1 <1 <1

Product activation height (cm) 20.9 5.90 20.5 5.95

Specificity Results (in addition to above for Liquid Sensor and Universal Sump Sensor):

Activated: diesel fuel, synthetic gasoline, heating oil #2, water.

Comments:

Universal Reservoir Sensor is intended to monitor level of either ethylene glycol or calcium chloride 

solutions in the interstitial or annular space of a double-walled tank. 

Universal Reservoir Sensor activates an alarm if any significant gain or loss of solution occurs. 

Sensors are reusable.

Petro Vend, Inc. Evaluator: Carnegie Mellon Research Institute

6900 Santa Fe Dr. Tel: (412) 268-3495

Hodgkins, IL 60525-9909 Date of Evaluation: 10/15/92

Tel: (708) 485-4200 
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

231

Revision Date: April 18, 1997

Petro Vend, Inc.

SiteSentinel 

30-3206, -3207, -3210 Sensors

LIQUID-PHASE OUT-OF-TANK PRODUCT DETECTOR

Detector:

Output type: qualitative

Sampling frequency: continuous

Operating principle: product permeable

Test Results:

unleaded gasoline synthetic gasoline

Detection time (min:sec) 01:41 05:14

Fall time (hr:min:sec) 07:28:44 00:18:36

Lower detection limit (cm) 0.02 0.02

Specificity Results (in addition to above):

Activated: n-hexane, diesel fuel, jet-A fuel, toluene, xylene(s).

Manufacturer’s specifications:

Conductive polymer.

Comments:

Sensors are reusable. 

Petro Vend, Inc. Evaluator: Underwriters Laboratories, Inc.

6900 Santa Fe Dr. Tel: (847) 272-8800

Hodgkins, IL 60525-9909 Date of Evaluation: 12/10/92

Tel: (708) 485-4200
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

232

Revision Date: August 23, 1999

Petro Vend, Inc.

Petrosentry TLD III, SiteSentinel Smart Module and Vapor Sensor

VAPOR-PHASE OUT-OF-TANK PRODUCT DETECTOR

Detector:

Output type: qualitative

Sampling frequency: continuous

Operating principle: metal oxide semiconductor

Test Results:

Petrosentry TLD III benzene 2-methylbutane

Detection time (sec) 5 16

Fall time (min:sec) 4:12 0:42

Lower detection limit (ppm) 12.5 12.5

SiteSentinel Smart 

Module and Vapor Sensor unleaded gasoline synthetic gasoline JP-4 jet fuel

Detection time (sec) 5 7 10

Fall time (min:sec) 6:30 3:35 4:26

Lower detection limit (ppm) 10 10 10

Specificity Results (in addition to above for Petrosentry TLD III):

Activated: n-hexane, toluene, n-butane, isobutane, 2-methylpentane.

Specificity Results (in addition to above for SiteSentinal Smart Module and Vapor Sensor):

Activated: n-hexane, toluene, xylene(s).

Manufacturer’s specifications:

Petrosentry TLD III maximum wire distance: 500 ft using 18 AWG

Petro Vend, Inc. Evaluator: Carnegie Mellon Research Institute

6900 Santa Fe Dr. Tel: (412) 268-3495

Hodgkins, IL 60525-9909 Dates of Evaluation: 03/26/91, 04/16/92

Tel: (708) 485-4200 
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

233

Revision Date: August 23, 1999

Pneumercator Company, Inc.

TMS 2000, TMS 3000

(Magnetostrictive Probe)

AUTOMATIC TANK GAUGING METHOD

Certification: Leak rate of 0.2 gph with PD = 95.0% and PFA = 5% for 2 hour test.

Leak rate of 0.2 gph with PD = 99.8% and PFA = 0.2% for 4 hour test

Leak rate of 0.2 gph with PD = 99.9% and PFA = 0.1% for 8 hour test.

Leak Threshold: 0.1 gph. A tank system should not be declared tight if the test result indicates a loss 

or gain that equals or exceeds this threshold.

Applicability: Gasoline, diesel, aviation fuel.

Other liquids maybe tested after consultation with the manufacturer.

Tank Capacity: Maximum of 20,000 gallons.

Tank must be between 20 and 95% full.

Waiting Time: Minimum of 8 hours between delivery and testing.

Minimum of 20 minutes between dispensing and testing.

There must be no delivery during waiting time.

Test Period: Minimum of 2 hours.

Test data are acquired and recorded by a computer. 

Leak rate is calculated from data determined to be valid by statistical analysis.

There must be no dispensing or delivery during test.

Temperature: Average for product is determined by probe which contains 5 thermistors.

At least one thermistor must be submerged in product during test.

Water Sensor: Must be used to detect water ingress.

Minimum detectable water level in the tank is 0.488 inch.

Minimum detectable change in water level is 0.124 inch.

Calibration: Thermistors and probe must be checked and calibrated in accordance with 

manufacturer's instructions.

Comments: Not evaluated using manifold tank systems.

Tests only portion of tank containing product.

As product level is lowered, leak rate in a leaking tank decreases (due to lower head 

pressure). Consistent testing at low levels could allow a leak to remain undetected.

EPA leak detection regulations require testing of the portion of the tank system which 

routinely contains product.

Pneumercator Company, Inc. Evaluator: Ken Wilcox Associates

120 Finn Court Tel: (816) 443-2494

Farmingdale, NY 11735 Date of Evaluation: 07/15/97

Tel: (516) 293-8450 
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

234

Revision Date: August 23, 1999

Pneumercator Company, Inc.

TMS 2000, TMS 3000

(Magnetostrictive Probe)

AUTOMATIC TANK GAUGING METHOD

Certification: Leak rate of 0.1 gph with PD = 95.3% and PFA = 4.7% for 7 hour test.

Leak rate of 0.1 gph with PD = 95.8% and PFA = 4.2% for 8 hour test.

Leak Threshold: 0.05 gph. A tank system should not be declared tight if the test result indicates a loss 

or gain that equals or exceeds this threshold.

Applicability: Gasoline, diesel, aviation fuel.

Other liquids maybe tested after consultation with the manufacturer.

Tank Capacity: Maximum of 20,000 gallons.

Tank must be between 20 and 95% full.

Waiting Time: Minimum of 8 hours between delivery and testing.

Minimum of 20 minutes between dispensing and testing.

There must be no delivery during waiting time.

Test Period: Minimum of 7 hours.

Test data are acquired and recorded by a computer. 

Leak rate is calculated from data determined to be valid by statistical analysis.

There must be no dispensing or delivery during test.

Temperature: Average for product is determined by probe which contains 5 thermistors.

At least one thermistor must be submerged in product during test.

Water Sensor: Must be used to detect water ingress.

Minimum detectable water level in the tank is 0.488 inch.

Minimum detectable change in water level is 0.124 inch.

Calibration: Thermistors and probe must be checked and calibrated in accordance with 

manufacturer's instructions.

Comments: Not evaluated using manifold tank systems.

Tests only portion of tank containing product.

As product level is lowered, leak rate in a leaking tank decreases (due to lower head 

pressure). Consistent testing at low levels could allow a leak to remain undetected.

EPA leak detection regulations require testing of the portion of the tank system which 

routinely contains product.

Pneumercator Company, Inc. Evaluator: Ken Wilcox Associates

120 Finn Court Tel: (816) 443-2494

Farmingdale, NY 11735 Date of Evaluation: 07/15/97

Tel: (516) 293-8450 
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

235

Revision Date: April 18, 1997

Pneumercator Company, Inc.

LC1000, E-14-29, E-700-1, LDE-700, LDE-740, TMS 3000

LS600AB, LS600LDBN, LS610, RSU800 

LIQUID-PHASE INTERSTITIAL DETECTOR

Detector:

Output type: qualitative

Sampling frequency: continuous

Operating principle: float switch

Test Results:

LS600AB unleaded gasoline diesel water

Detection time (sec) <1 <1 <1

Fall time (sec) <1 <1 <1

Lower detection limit (in) 3.32 3.28 3.18

LS600LDBN

Detection time (sec) <1 <1 <1

Fall time (sec) <1 <1 <1

Lower detection limit (in) 0.99 0.97 0.87

LS610

Detection time (sec) <1 <1 <1

Fall time (sec) <1 <1 <1

Lower detection limit (in) 0.44 0.43 0.42

RSU800 (low level)

Detection time (min) <1 <1 <1

Fall time (min) <1 <1 <1

Lower detection limit (ppm) 2.57 2.53 2.31

RSU800 (high level)

Detection time (min) <1 <1 <1

Fall time (min) <1 <1 <1

Lower detection limit (ppm) 13.31 13.24 13.01

Specificity Results:

Manufacturer and evaluator claim sensor will respond to any liquid.

Comments:

Sensors are reusable.

Pneumercator Company, Inc. Evaluator: Ken Wilcox Associates

120 Finn Court Tel: (816) 443-2494

Farmingdale, NY 11735 Date of Evaluation: 01/22/96

Tel: (516) 293-8450
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

236

Revision Date: April 18, 1997

Pneumercator Company, Inc.

LDE 700, LDE 740, LDE 9000

Sensor Probe Models 9-901, 9-902, 9-903

LIQUID-PHASE INTERSTITIAL DETECTOR

Detector:

Output type: qualitative

Sampling frequency: continuous

Operating principle: capacitance

Test Results:

unleaded gasoline synthetic gasoline

Detection time (sec) <1 <1

Fall time manual reset manual reset

Lower detection limit (cm)

 9-901 0.32 0.36

 9-902 0.36 0.34

 9-903 0.76 0.74

Specificity Results (in addition to above):

Activated: n-hexane, diesel fuel, jet-A fuel, toluene, xylene(s), water.

Comments:

Sensors are reusable.

Pneumercator Company, Inc. Evaluator: Ken Wilcox Associates

120 Finn Court Tel: (816) 443-2494

Farmingdale, NY 11735 Date of Evaluation: 12/14/93

Tel: (516) 293-8450
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

237

Revision Date: November 6, 1997

ProTank, Inc.

LTH-5000 Line Tester

LINE TIGHTNESS TEST METHOD

Certification: Leak rate of 0.1 gph with PD = 99.8% and PFA = 1.3%. 

Leak Threshold: 0.05 gph. A pipeline system should not be declared tight if the test result indicates 

a loss that equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel, fuel oil, solvents.

Specification: System tests fiberglass and steel pipelines.

Tests are conducted at 150% operating pressure.

Mechanical line leak detector must be removed from pipeline for duration of test.

Pipeline Capacity: Maximum of 40 gallons.

Waiting Time: None between delivery and testing. 

Minimum of 1 hour between dispensing and testing.

Test Period: Minimum of 10 minutes. Repeat 10 minute cycles are necessary if data does not 

meet the manufacturer’s criteria.

Test data are acquired and recorded manually.

Manual calculations are performed by operator on site.

Calibration: Sensors must be calibrated before each test.

ProTank, Inc. Evaluator: Midwest Research Institute

3545 Lomita Blvd., Suite G Tel: (816) 753-7600

Torrance, CA 90505 Date of Evaluation: 02/14/91

Tel: (800) 438-1111
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

238

Revision Date: November 6, 1997

ProTank, Inc.

LTP-5000 Line Tester

LINE TIGHTNESS TEST METHOD

Certification: Leak rate of 0.1 gph with PD = 99.0% and PFA = 0.1%. 

Leak Threshold: 0.05 gph. A pipeline system should not be declared tight if the test result indicates 

a loss that equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel, and fuel oil #4, fuel oil #6, solvents.

Specification: System tests fiberglass and steel pipelines.

Tests are conducted at 150% operating pressure.

Mechanical line leak detector must be removed from pipeline for duration of test.

Pipeline Capacity: Maximum of 41 gallons.

Waiting Time: None between delivery and testing. 

Minimum of 1 hour between dispensing and testing.

Test Period: Minimum of 1 hour.

Pipe deflection, vapor pockets, and large temperature differences may produce 

inconsistent readings.

Testing to continue until stable conditions are present.

Test data are acquired and recorded manually.

Manual calculations are performed by operator on site.

Calibration: Sensors must be calibrated before each test.

ProTank, Inc. Evaluator: Midwest Research Institute

3545 Lomita Blvd., Suite G Tel: (816) 753-7600

Torrance, CA 90505 Date of Evaluation: 08/30/91

Tel: (800) 438-1111
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

239

Revision Date: November 6, 1997

ProTank, Inc.

UTA-5000 Ullage Tester 

(Vacuum or Pressure Test)

NON-VOLUMETRIC TANK TIGHTNESS TEST METHOD (ULLAGE)

Certification: Leak rate of 0.1 gph with PD = 100% and PFA = 0%. 

Leak Threshold: A tank system should not be declared tight when the acoustic signal detected is 

different from the baseline.

Baseline is the acoustic signal before tank is pressurized or evacuated.

Applicability: Gasoline, diesel, aviation fuel, fuel oils #4 and #6, waste oil, solvents. 

Tank Capacity: Maximum ullage volume is 16,500 gallons. 

Waiting Time: None between delivery and testing

Test Period: A few minutes to determine background noise and a leak.

Depends on background noise at the site and on the size of the leak. 

After the desired pressure has been reached, the tank should be allowed to settle 

for 10 minutes.

Test Pressure: Vacuum of 1 psi must be maintained in ullage by a vacuum blower, or total pressure at 

bottom of tank of 4 psi must be maintained using nitrogen.

Temperature: Acoustic signal is independent of product temperature.

Groundwater: Depth to groundwater in backfill must be determined. If groundwater is above product 

level, vacuum test should not be used. 

Pressure test may only be used if net pressure can be maintained at a minimum 1 psi 

throughout ullage during test. If this requires more than 5 psi total pressure at tank 

bottom, the ullage test must not be used.

Comments: Not evaluated using manifold tank systems. 

Evaluated using diesel fuel.

Tests only ullage portion of the tank. 

Product-filled portion of tank must be tested with an underfill test method.

Microphone was 25 feet away from the leak source during evaluation.

If background noise is too high, test is inconclusive. 

Noise signals are tape recorded (not digitally recorded).

Vacuum test method may not be effective in some backfill (such as clay) because it 

may plug holes in tank.

If soil is saturated with product, air or water ingress may not be declared by vacuum 

test. A well point in backfill may help identify presence of this condition.

ProTank, Inc. Evaluator: Ken Wilcox Associates

3545 Lomita Blvd., Suite G Tel: (816) 443-2494

Torrance, CA 90505 Date of Evaluation: 01/15/93

Tel: (800) 438-1111
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

240

Revision Date: November 6, 1997

ProTank, Inc.

UTF-5000 Ullage Tester

(Pressure Test)

NON-VOLUMETRIC TANK TIGHTNESS TEST METHOD (ULLAGE)

Certification: Leak rate of 0.1 gph with PD = 95.24% and PFA = 0%.

Leak Threshold: A tank system should not be declared tight when the make-up gas flow rate into ullage 

equals or exceeds 0.275 cubic feet/hour.

Applicability: Gasoline, diesel, aviation fuel, heavy fuel oil #4, solvents.

Tank Capacity: Maximum ullage volume is 7,500 gallons.

Waiting time: Minimum of 2 hours between delivery and testing.

Test Period: Minimum of 20 minutes, consisting of 2 consecutive 10-minute test periods.

Test data are acquired and recorded manually.

Test Pressure: Pressure must be increased in ullage such that total pressure at bottom of tank does 

not exceed 5.0 psi.

Pressure must be maintained for a minimum of 5 minutes per 1,000 gallons of ullage.

At conclusion of this stabilization period, ullage pressure must be reduced by 

0.5 psi for remainder of test.

Temperature: Ullage must be monitored for rate of temperature change, which must not exceed 

manufacturer’s tabulated values.

Groundwater: Depth to groundwater in backfill must be determined. If groundwater is above product 

level, net pressure must exceed 1 psi in the ullage during test.

If this requires more than 5 psi total pressure at tank bottom, the ullage test must not 

be used.

Comments: Not evaluated using manifold tank systems.

Evaluated using diesel fuel.

Tests only ullage portion of tank. 

Product-filled portion of tank must be tested using a volumetric underfill test method.

ProTank, Inc. Evaluator: Midwest Research Institute

3545 Lomita Blvd., Suite G Tel: (816) 753-7600

Torrance, CA 90505 Date of Evaluation: 12/04/92

Tel: (800) 438-1111
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

241

Revision Date: November 6, 1997

ProTank, Inc.

UTFP-5000 Ullage Tester 

(Pressure Test)

NON-VOLUMETRIC TANK TIGHTNESS TEST METHOD (ULLAGE)

Certification: Leak rate of 0.1 gph with PD = 95.24% and PFA = 0%. 

Leak Threshold: A tank system should not be declared tight when the pressure decay trend equals or 

exceeds ± 0.016 psi/hr.

Applicability: Gasoline, diesel, aviation fuel, heavy fuel oils #2 through #6, solvents. 

Tank Capacity: Maximum ullage volume is 10,260 gallons.

Waiting time: Minimum of 2 hours between delivery and testing. 

Test Period: Minimum of 30 minutes (after data trend has been established).

Test Pressure: Total pressure of 4.0 psi must be applied at bottom of tank.

Temperature: Ullage must be monitored during test, and a correction factor is applied to account for 

temperature changes. If ullage temperature changes exceed 5 degrees F, test must 

not be conducted.

Groundwater: Depth to groundwater in backfill must be determined. If groundwater is above product 

level, net pressure must be maintained at a minimum of 1 psi in the ullage during test.

Comments: Not evaluated using manifold tank systems.

Evaluated using diesel fuel.

Tests only ullage portion of tank.

Product-filled portion of tank must be tested using a volumetric underfill test method.

ProTank, Inc. Evaluator: ADA Technologies, Inc.

3545 Lomita Blvd., Suite G Tel: (303) 792-5615

Torrance, CA 90505 Date of Evaluation: 04/10/92

Tel: (800) 438-1111
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

242

Revision Date: November 14, 1997

ProTank, Inc.

Fast Test 

(Underfill Test)

NON-VOLUMETRIC TANK TIGHTNESS TEST METHOD (VACUUM)

Certification: Leak rate of 0.1 gph with PD = 100% and PFA = 0%. 

Leak Threshold: A tank system should not be declared tight when the acoustic signal detected is 

different from the baseline.

Baseline is the acoustic signal before tank is evacuated.

Applicability: Gasoline, diesel, aviation fuel, fuel oils #4, waste oil, solvents. 

Tank Capacity: Maximum product volume of 30,000 gallons. Tank product level must be between 7 

and 86 inches.

Waiting Time: None between delivery and testing

Test Period: A few minutes to determine background noise and a leak.

Depends on background noise at the site and on size of leak. 

Test Pressure: Vacuum of 0.5 psi beyond the vacuum required to overcome the tank bottom pressure 

must be maintained in ullage by a vacuum blower.

Net vacuum applied = 0.5 psi + [inches of product level x the specific gravity of product 

x 0.036].

Temperature: Acoustic signal is independent of product temperature.

Groundwater: Depth to groundwater in backfill must be determined. If groundwater is above the tank 

bottom, this test system may not be used. 

Comments: Not evaluated using manifold tank systems. 

Evaluated using diesel fuel.

Tests only portion of tank containing product. 

Ullage portion of tank must be tested with an ullage test method.

Microphone was 25 feet away from the leak source during evaluation.

If background noise is too high, test is inconclusive. 

Noise signals are tape recorded (not digitally recorded).

Vacuum test method may not be effective in some backfill (such as clay) because it 

may plug holes in tank.

If soil is saturated with product, air or water ingress may not be declared by vacuum 

test. A well point in backfill may help identify presence of this condition.

ProTank, Inc. Evaluator: Ken Wilcox Associates

3545 Lomita Blvd., Suite G Tel: (816) 443-2494

Torrance, CA 90505 Date of Evaluation: 06/25/96

Tel: (800) 438-1111
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

243

Revision Date: November 14, 1997

ProTank, Inc.

VU-5000 Underfill Tester

VOLUMETRIC TANK TIGHTNESS TEST METHOD (UNDERFILL)

Certification: Leak rate of 0.1 gph with PD = 99.9% and PFA = 0.1%.

Leak Threshold: 0.05 gph. A tank system should not be declared tight if the test result indicates a loss 

or gain that equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel, fuel oils #4 and #6, waste oil, solvents, other products.

Tank Capacity: Maximum of 18,000 gallons.

Tank must contain minimum 24 inches of product.

Waiting Time: Must be long enough between delivery and testing to ensure a temperature 

change of less than 0.09 degrees F per hour, typically a minimum of 2 hours.

There must be no delivery during waiting time.

Test Period: Minimum of 2 hours. 

Test data are acquired and recorded by a computer.

Leak rate is calculated from average over data window.

There must be no dispensing or delivery during test.

Temperature: Average for product is typically determined by 5 thermistors. 

A minimum of 1 thermistor is required.

Groundwater: Depth to groundwater in backfill must be determined. If groundwater is above bottom 

of tank, product level must be adjusted to provide a minimum net pressure of 1 psi at 

bottom of tank during test. (There must be a difference of at least 37 inches between 

groundwater level and product level to provide a net pressure of 1 psi at bottom of tank 

during test.)

Calibration: Thermistors must be checked annually and calibrated if necessary.

Comments: Not evaluated using manifold tank systems.

Tests only portion of tank containing product.

As product level is lowered, leak rate in a leaking tank decreases (due to lower head 

pressure). Consistent testing at low levels could allow a leak to remain undetected.

EPA leak detection regulations require testing of the portion of the tank system which 

routinely contains product.

ProTank, Inc. Evaluator: Ken Wilcox Associates

3545 Lomita Blvd., Suite G Tel: (816) 443-2494

Torrance, CA 90505 Date of Evaluation: 02/15/93

Tel: (800) 438-1111
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

244

Revision Date: November 14, 1997

ProTank, Inc.

VUP-5000 Underfill Tester

VOLUMETRIC TANK TIGHTNESS TEST METHOD (UNDERFILL)

Certification: Leak rate of 0.1 gph with PD = 99.99% and PFA = 0.005%.

Leak Threshold: 0.05 gph. A tank system should not be declared tight if the test result indicates a loss 

or gain that equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel, fuel oil, waste oil, solvents.

Tank Capacity: Maximum of 18,000 gallons.

Tank must be between 11 and 95% full.

Waiting Time: Minimum of 6 hours between delivery and testing. 

None between dispensing and testing.

There must be no delivery during waiting time.

Test Period: Minimum of 3 hours. 

Test data are acquired and recorded by a computer. 

Leak rate is calculated from average of subsets of all collected data.

There must be no dispensing or delivery during test.

Temperature: Average for product is determined by temperature sensor probes.

A minimum 12 inches of product must be present for the temperature probes to 

operate properly.

Groundwater: Depth to groundwater in backfill must be determined. If groundwater is above bottom 

of tank, product level must be adjusted during test to provide a minimum net pressure 

of 1 psi at bottom of tank during test. (There must be a difference of at least 37 inches 

between groundwater level and product level to provide a net pressure of 1 psi at 

bottom of tank during test.)

Calibration: Temperature probes and floats must be checked for proper operation prior to each test.

Comments: Not evaluated using manifold tank systems.

Tests only portion of tank containing product.

As product level is lowered, leak rate in a leaking tank decreases (due to lower head 

pressure). Consistent testing at low levels could allow a leak to remain undetected.

EPA leak detection regulations require testing of the portion of the tank system which 

routinely contains product.

ProTank, Inc. Evaluator: ADA Technologies

3545 Lomita Blvd., Suite G Tel: (303) 792-5615

Torrance, CA 90505 Date of Evaluation: 09/09/92

Tel: (800) 438-1111
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

245

Revision Date: August 23, 1999

Raychem Corp.

TraceTek Alarm and Locator Modules 

TT502, TT5000, TT3000 Fuel Sensing Cable

LIQUID-PHASE OUT-OF-TANK PRODUCT DETECTOR

Detector:

Output type: qualitative 

Sampling frequency: continuous

Operating principle: electrical conductivity

Test Results:

unleaded gasoline

TT502

1/3 MER*

334 m

2/3 MER

665 m

MER

995 m

Response time (min) 22.11 17.13 19.42

Recovery time (min) N/A* N/A N/A

Product activation height (cm) 1.53 1.53 1.53

Detection length (cm) 61 61 61

Lower detection limits (cm)

 Product activation height N/D* N/D 0.77

 Detection length N/D N/D 10

TT5000 1/3 MER

508 m

2/3 MER

1016 m

MER

1524 m

Response time (min) 12.02 9.18 7.51

Recovery time (min) N/A N/A N/A

Product activation height (cm) 0.74 0.74 0.74

Detection length (cm) 30.5 30.5 30.5

Lower detection limits (cm)

 Product activation height N/D N/D 0.74

 Detection length N/D N/D 10

3% by weight salt in water other solutions**

TT3000

1/3 MER

508 m

2/3 MER

1016 m

MER

1524 m

MER

1524 m

Response time (min) <1 <1 <1 <1

Recovery time (min) <1 <1 <1 <1

Product activation height (cm) <0.3 <0.3 <0.3 <0.3

Detection length (cm) <15.2 <15.2 <15.2 <15.2

Lower detection limits (cm)

 Product activation height N/D N/D <0.3 N/D

 Detection length N/D N/D <5.08 N/D

* See glossary.

** 5 % by volume oil in 3 % by weight salt water, 10 % by volume oil in 3 % by weight salt water, 0.1 M hydrochloric acid (HCl), 

0.1 M sodium hydroxide (NaOH).

Specificity Results (in addition to above for TT502 and TT5000):

Activated: synthetic gasoline, diesel fuel, heating oil #2, jet A fuel (TT5000 only).

Not Activated: water.

Specificity Results (in addition to above for TT3000):

Activated: water

Not Activated: unleaded gasoline, synthetic gasoline, diesel fuel, JP-8 fuel.

Comments:

Evaluation also covered quantitative leak location.

TT5000 Fuel Sensing cable is not reusable.

Raychem Corp. Evaluator: Carnegie Mellon Research Institute
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

246

300 Constitution Dr. Tel: (412) 268-3495

Menlo Park, CA 94025-1164 Dates of Evaluation: 05/15/92, 12/20/95,

Tel: (650) 361-3333 02/20/98
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

247

Revision Date: June 8, 1998

Ronan Engineering Co.

Ronan X-76 Automatic Line Leak Detector 

Version X-76 DM-4 Microprocessor and JT-H2 Line Pressure Sensor

AUTOMATIC ELECTRONIC LINE LEAK DETECTOR

Certification: Leak rate of 3.0 gph with PD = 100% and PFA = 0%.

Leak Threshold: 0.831 gph. A pipeline system should not be declared tight if the test result indicates 

a loss that equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel, fuel oils #4 and #6, waste oil, solvents.

Specification: System tests pressurized fiberglass and steel pipelines. 

Tests are conducted at operating pressure.

System will not function with a mechanical line leak detector installed in the 

pipeline.

Pipeline Capacity: Maximum of 45 gallons. 

Waiting Time: None between delivery and testing.

None between dispensing and testing.

Test Period: Response time is 20 seconds.

Test data are acquired and recorded by a permanently installed microprocessor.

Calculations are automatically performed by the microprocessor.

System Features: Permanent installation on pipeline.

Automatic testing of pipeline.

Preset threshold.

Single test to determine if pipeline is leaking.

Pump shutdown, message display, and alarm activation if leak is declared.

Calibration: System must be checked annually and calibrated if necessary in accordance with 

manufacturer's instructions.

Ronan Engineering Co. Evaluator: Midwest Research Institute

21200 Oxnard St. Tel: (816) 753-7600

Woodland Hills, CA 91365 Date of Evaluation: 10/04/91

Tel: (800) 327-6626
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

248

Revision Date: November 14, 1997

Ronan Engineering Co.

Ronan X-76 Automatic Line Leak Detector 

Version X-76 DM-4 Microprocessor and JT-H2 Line Pressure Sensor

AUTOMATIC ELECTRONIC LINE LEAK DETECTOR

Certification: Leak rate of 0.1 gph with PD = 100% and PFA = 0%.

Leak Threshold: 0.066 gph. A pipeline system should not be declared tight if the test result indicates 

a loss that equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel, fuel oils #4 and #6, waste oil, solvents.

Specification: System tests pressurized fiberglass and steel pipelines. 

Tests are conducted at operating pressure.

System will not function with a mechanical line leak detector installed in the 

pipeline.

Pipeline Capacity: Maximum of 45 gallons. 

Waiting Time: None between delivery and testing. 

Minimum of 2 hours between dispensing and testing.

Test Period: Response time is 20 minutes.

Test data are acquired and recorded by a permanently installed microprocessor.

Calculations are automatically performed by the microprocessor.

System Features: Permanent installation on pipeline.

Automatic testing of pipeline.

Preset threshold.

Single test to determine if pipeline is leaking.

Pump shutdown, message display, and alarm activation if leak is declared.

Calibration: System must be checked annually and calibrated if necessary in accordance with 

manufacturer's instructions.

Ronan Engineering Co. Evaluator: Midwest Research Institute

21200 Oxnard St. Tel: (816) 753-7600

Woodland Hills, CA 91365 Date of Evaluation: 10/04/91

Tel: (800) 327-6626
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

249

Revision Date: November 14, 1997

Ronan Engineering Co.

X-76 ETM, X-76 ETM-4X

(Magnetostrictive Probe)

AUTOMATIC TANK GAUGING METHOD

Certification: Leak rate of 0.2 gph with PD = 99.96% and PFA = 0.044%.

Leak Threshold: 0.1 gph. A tank system should not be declared tight if the test result indicates a loss 

or gain that equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel, fuel oil #4, waste oil, solvents. 

Other liquids may be tested after consultation with the manufacturer.

Tank Capacity: Maximum of 15,000 gallons.

Tank must be between 50 and 95% full if system's leak threshold is set at 0.1 gph. 

System may also be used to test at a minimum product height of 12 inches or a 14% 

full tank, whichever is higher, if the leak threshold is set at 0.049 gph. This threshold is 

calculated based on PD = 95% and PFA = 5%.

Waiting Time: Minimum of 2 hours between delivery and testing.

There must be no dispensing or delivery during waiting time.

Test Period: Minimum of 4 hours.

Test data are acquired and recorded by a computer.

Leak rate calculated from data determined to be statistically valid.

There must be no dispensing or delivery during test. 

Temperature: Average for product is determined by a minimum of 1 resistance temperature

detector (RTD).

Water Sensor: Must be used to detect water ingress.

Minimum detectable water level in the tank is 0.947 inch.

Minimum detectable water level change is 0.0254 inch.

Calibration: RTD and probe must be checked and calibrated in accordance with manufacturer's 

instructions.

Comments: Not evaluated using manifold tank systems.

Tests only portion of tank containing product.

As product level is lowered, leak rate in a leaking tank decreases (due to lower head 

pressure). Consistent testing at low levels could allow a leak to remain undetected.

EPA leak detection regulations require testing of the portion of the tank system which 

routinely contains product.

X76ETM-4X console has different housing which allows it to be mounted outside.

Ronan Engineering Co. Evaluator: Ken Wilcox Associates

21200 Oxnard St. Tel: (816) 443-2494

Woodland Hills, CA 91365 Date of Evaluation: 02/07/91

Tel: (800) 327-6626
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

250

Revision Date: November 14, 1997

Ronan Engineering Co.

X-76 ETM, X-76 ETM-4X

(Magnetostrictive Probe)

AUTOMATIC TANK GAUGING METHOD

Certification: Leak rate of 0.1 gph with PD = 95.34% and PFA = 4.66%.

Leak Threshold: 0.05 gph. A tank system should not be declared tight if the test result indicates a loss 

or gain that equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel, fuel oil #4, waste oil, solvents. 

Other liquids may be tested after consultation with the manufacturer.

Tank Capacity: Maximum of 15,000 gallons.

Tank must be between 50 and 95% full.

Waiting Time: Minimum of 8 hours between delivery and testing.

There must be no dispensing or delivery during waiting time.

Test Period: Minimum of 4 hours.

Test data are acquired and recorded by a computer.

Leak rate calculated from data determined to be statistically valid.

There must be no dispensing or delivery during test.

Temperature: Average for product is determined by a minimum of 1 resistance temperature

detector (RTD).

Water Sensor: Must be used to detect water ingress.

Minimum detectable water level in the tank is 0.947 inch.

Minimum detectable water level change is 0.0254 inch.

Calibration: RTD and probe must be checked and calibrated in accordance with 

manufacturer's instructions.

Comments: Not evaluated using manifold tank systems.

Tests only portion of tank containing product.

As product level is lowered, leak rate in a leaking tank decreases (due to lower head 

pressure). Consistent testing at low levels could allow a leak to remain undetected.

EPA leak detection regulations require testing of the portion of the tank system which 

routinely contains product.

X76ETM-4X console has different housing which allows it to be mounted outside.

Ronan Engineering Co. Evaluator: Ken Wilcox Associates

21200 Oxnard St. Tel: (816) 443-2494

Woodland Hills, CA 91365 Date of Evaluation: 11/21/91

Tel: (800) 327-6626
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

251

Revision Date: September 11, 1998

Ronan Engineering Co.

 Ronan Controller Models X76S; X76VS; X76LVC; TRS76; X76ETM, LVCS; X76CTM-N4; X76ETM-4X;

X76-4X, -3, -6, -9, -12; X76AST-4X

Ronan Sensor Models LS-3 N.C.; LS-3 N.O.; LS-30; LS-7; HVA; LS-3SS; LS-1

LIQUID-PHASE INTERSTITIAL DETECTOR

Detector:

Output type: qualitative

Sampling frequency: continuous

Operating principle: float switch

Test Results:

LS-3 N.C. (normally closed) unleaded gasoline water

Detection time (sec) <1 <1

Fall time (sec) <1 <1

Lower detection limit (cm) 2.77 2.31

LS-3 N.O. (normally open)

Detection time (sec) <1 <1

Fall time (sec) <1 <1

Lower detection limit (cm) 2.31 1.70

LS-30 (high level)

Detection time (sec) <1 <1

Fall time (sec) <1 <1

Lower detection limit (cm) N/D* 15.24

LS-30 (low level)

Detection time (sec) <1 <1

Fall time (sec) <1 <1

Lower detection limit (cm) N/D 4.72

LS-7

Detection time (sec) <1 <1

Fall time (sec) <1 <1

Lower detection limit (cm) 1.09 0.81

HVA

Detection time (sec) <1 <1

Fall time (sec) <1 <1

Lower detection limit (cm) 0.84 0.71

*See Glossary

Comments:

Sensors are reusable. 

LS-3SS is identical to LS-3 N.C. and LS-3 N.O. except that LS-3SS also tests for methanol and has a 

stainless steel float.

The only difference between LS-1 and LS-3 is that LS-1 is smaller in diameter.

Ronan Engineering Co. Evaluator: Ken Wilcox Associates

21200 Oxnard St. Tel: (816) 443-2494

Woodland Hills, CA 91365 Date of Evaluation: 02/06/92

Tel: (800) 327-6626
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

252

Revision Date: November 6, 1997

Schuster Instruments

Tel-A-Leak 1 

VOLUMETRIC TANK TIGHTNESS TEST METHOD (OVERFILL)

Certification: Leak rate of 0.1 gph with PD = 99.86% and PFA = 0.14%.

Leak Threshold: 0.05 gph. A tank system should not be declared tight if the test result indicates a loss 

or gain that equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel, fuel oil #4, waste oil, solvents.

Tank Capacity: Maximum of 15,000 gallons.

Tank must be minimum 100% full.

Waiting Time: Minimum of 6 hours between delivery and testing. 

Minimum of 1 hour between "topping off" and testing. 

There must be no dispensing or delivery during waiting time.

Test Period: Minimum of 1 hour.

Test data are acquired and recorded manually and by a computer.

Leak rate calculated from average of the last 10 consecutive 6 minute readings.

There must be no dispensing or delivery during test.

Temperature: Average for product is determined by a minimum of 10 temperature sensors.

Groundwater: Depth to groundwater in backfill must be determined. If groundwater is above bottom 

of tank, product level must be adjusted to provide net pressure of 2-4 psi at bottom of 

tank during test.

Calibration: Temperature sensors must be checked annually and calibrated annually.

Comments: Not evaluated using manifold tank systems.

Schuster Instruments Evaluator: W. A. Kibbe and Associates

211 E. Grove St. Tel: (517) 797-2425

Kawkawlin, MI 48631 Date of Evaluation: 11/26/90

Tel: (517) 684-6638
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

253

Revision Date: November 14, 1997

Simmons Corp.

SIR 5.7

STATISTICAL INVENTORY RECONCILIATION TEST METHOD (QUANTITATIVE)

Certification: Leak rate of 0.1 gph with PD = 99.0% and PFA = 1.0%.

Leak Threshold: 0.05 gph. A tank system should not be declared tight if the test result indicates a 

loss or gain that equals or exceeds this threshold.

Applicability: Motor vehicle fuels.

Tank Capacity: Maximum of 18,000 gallons. 

Data Requirement: Minimum of 30 days of product level and flow through data. 

Comments: Not evaluated using manifold tank systems.

Of 41 data sets submitted for evaluation, all were analyzed with conclusive results.

Median monthly throughput of tanks evaluated was 7,000 gallons.

Leak rates ranging from 0.05 to 0.2 gph were used in evaluation.

Data sets evaluated were supplied by evaluator.

Simmons Corp. Evaluator: S.S.G. Associates

106 E. Main Street Tel: (601) 234-1179

Richardson, TX 75081-3327 Date of Evaluation: 12/15/92

Tel: (800) 848-8378
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

254

Revision Date: November 14, 1997

Simmons Corp.

SIR 5.7 LM

STATISTICAL INVENTORY RECONCILIATION TEST METHOD (QUANTITATIVE)

Certification: Leak rate of 0.1 gph with PD = 99.0% and PFA = 1.0%.

Leak Threshold: 0.05 gph. A tank system should not be declared tight if the test result indicates a 

loss or gain that equals or exceeds this threshold.

Applicability: Motor vehicle fuels.

Tank Capacity: Maximum of 45,000 gallons for single tank.

Maximum of 45,000 gallons cumulative volume for manifold tank systems with no 

more than 4 tanks in system. 

Data Requirement: Minimum of 29 days of product level and flow through data. 

Comments: 59% of data sets evaluated were from manifold tank systems.

7% of data sets evaluated used data collected by ATGs.

Of 41 data sets submitted for evaluation, all were analyzed with conclusive results.

Median monthly throughput of tanks evaluated was 40,165 gallons.

Leak rates of 0.05, 0.01 and 0.2 gph were used in evaluation.

Data sets evaluated were supplied by evaluator.

Simmons Corp. Evaluator: S.S.G. Associates

106 E. Main Street Tel: (601) 234-1179

Richardson, TX 75081-3327 Date of Evaluation: 10/28/95

Tel: (800) 848-8378
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

255

Revision Date: November 14, 1997

SIR International, Inc.

Mitchell's SIR Program v.2.6 (12-13-91)

STATISTICAL INVENTORY RECONCILIATION TEST METHOD (QUANTITATIVE)

Certification: Leak rate of 0.1 gph with PD = 98% and PFA = 2%.

Leak Threshold: 0.05 gph. A tank system should not be declared tight if the test result indicates a 

loss or gain that equals or exceeds this threshold.

Applicability: Gasoline, diesel, aviation fuel, fuel oil #4.

Tank Capacity: Maximum of 18,000 gallons.

Data Requirement: Minimum of 32 days of product level and flow through data.

Comments: Not evaluated using manifold tank systems.

Of 41 data sets submitted for evaluation, 24 "best" analyses were returned and 

17 data sets were not analyzed.

Median monthly throughput of tanks evaluated was 6313 gallons.

Leak rates of 0.049 to 0.21 gph were used in evaluation.

Data sets used in this evaluation were supplied by evaluator.

SIR International, Inc. Evaluator: Wilcox Associates

10235 W. Little York Rd., Suite 257 Tel: (816) 443-2494

Houston, TX 77040 Date of Evaluation: 01/27/92

Tel: (713) 937-6886
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

256

Revision Date: November 6, 1997

SIR Monitor (formerly Environmental Management Technologies)

SIR Monitor

STATISTICAL INVENTORY RECONCILIATION TEST METHOD (QUANTITATIVE)

Certification: Leak rate of 0.1 gph with PD = 99% and PFA = 1%.

Leak Threshold: 0.05 gph. A tank system should not be declared tight if the test result indicates a 

loss or gain that equals or exceeds this threshold.

Applicability: Gasoline, diesel, aviation fuel, fuel oil #4.

Tank Capacity: Maximum of 18,000 gallons.

Data Requirement: Minimum of 90 days of product level and flow through data are required before 

making the first evaluation. Following the first evaluation, subsequent evaluations 

are made based on minimum of 30 days of data.

Comments: Not evaluated using data from manifold tank systems.

Of 41 data sets submitted for evaluation, 5 were inconclusive.

Median monthly throughput of tanks evaluated was 14,600 gallons.

Leak rates of 0.05, 0.1, and 0.2 gph were used in evaluation.

Data sets evaluated were supplied by vendor.

SIR Monitor Evaluator: Nathan Adams,

P.O. Box 2791 Middle Tennessee State University

Murfreesboro, TN 37133 Tel: (615) 898-2644

Tel: (615) 895-2872 Date of Evaluation: 11/05/92
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

257

Revision Date: November 6, 1997

Sir Phoenix, Inc.

SIR PHOENIX

STATISTICAL INVENTORY RECONCILIATION TEST METHOD (QUANTITATIVE)

Certification: Leak rate of 0.1 gph with PD = 99.0% and PFA = 1%.

Leak Threshold: 0.05 gph. A tank system should not be declared tight if the test result indicates a 

loss or gain that equals or exceeds this threshold.

Applicability: Gasoline, diesel, aviation fuel, fuel oil #4.

Tank Capacity: Maximum of 18,000 gallons. 

Data Requirement: Minimum of 90 days of product level and flow through data are required before 

making the first evaluation. Following the first evaluation, subsequent evaluations 

are made based on minimum of 30 days of data.

Comments: Not evaluated using manifold tank systems.

Of 41 data sets submitted for evaluation, 5 were inconclusive.

Median monthly throughput of tanks evaluated was 14,600 gallons.

Leak rates of 0.05, 0.1, and 0.2 gph were evaluated.

Data sets evaluated were supplied by vendor.

Sir Phoenix, Inc. Evaluator: Nathan Adams,

9 Ford Rd., P.O. Box 229 Middle Tennessee State University

Leoma, TN 38468 Tel: (615) 898-2644

Tel: (931) 852-4121 Date of Evaluation: 11/05/92
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

258

Revision Date: November 6, 1997

Soiltest, Inc.

Soiltest Ainlay Tank 'Tegrity' Tester, S-3 

VOLUMETRIC TANK TIGHTNESS TEST METHOD (OVERFILL)

Certification: Leak rate of 0.1 gph with PD = 99% and PFA = 1%.

Leak Threshold: 0.05 gph. A tank system should not be declared tight if the test result indicates a loss 

or gain that equals or exceeds this threshold. 

Applicability: Gasoline, diesel.

Tank Capacity: Maximum of 15,000 gallons.

Tank must be minimum 100% full.

Waiting Time: Minimum of 10 hours between delivery and testing. 

Minimum of 2 hours between "topping off" and testing. 

There must be no dispensing or delivery during waiting time.

Test Period: Minimum of 1 hour, 30 minutes.

Test data are acquired and recorded manually and by a strip chart recorder.

Leak rate is calculated from last 1 hour, 30 minutes of test period data.

There must be no dispensing or delivery during test.

Temperature: Average for product is determined by a minimum of 3 thermistors.

Groundwater: Depth to groundwater in backfill must be determined. If groundwater is above bottom 

of tank, product level must be adjusted to provide net pressure of 2-4 psi at the bottom 

of tank during test.

Calibration: Level sensors must be calibrated before each test. 

Thermistors must be checked annually and calibrated if necessary. 

Comments: Not evaluated using manifold tank systems.

Soiltest, Inc. Evaluator: Law Engineering Industrial Services

86 Albrecht Dr., P. O. Box 8004 Tel: (800) 672-6601

Lake Bluff, IL 60044-8004 Date of Evaluation: 11/28/90

Tel: (800) 323-1242
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

259

Revision Date: August 23, 1999

Steel Tank Institute

Permatank Interstitial Vacuum Monitor

Liquid Leaks

PRESSURE/VACUUM INTERSTITIAL MONITOR

Certification: Leak rate of 0.1 gph with PD = 100% and PFA < 5%.

Leak Threshold: A tank system should not be declared tight when the vacuum decreases (pressure 

increases) 5 inches or more of mercury over the test period specified for each tank 

size. Vacuum prior to test must be minimum of 14 inches of mercury.

Applicability: Gasoline, diesel, water.

Tank Capacity: Maximum of 20,000 gallons. No minimum product level during test.

Waiting Time: None between delivery and testing.

Test Period: Test periods required for selected tank sizes to detect a leak rate of 0.1 gph:

Selected Tank Sizes gasoline diesel water

500 gal 0.4 hr 5.0 hr 4.8 hr

5,000 gal 1.3 hr 16.2 hr 15.7 hr

8,000 gal 2.1 hr 24.9 hr 24.2 hr

20,000 gal 3.7 hr 44.8 hr 43.6 hr

Comments: System tests the interstitial space between inner steel wall and outer fiberglass wall 

of Steel Tank Institute's Permatank.

Interstitial space is tested continuously.

System detects breaches in either inner or outer tank walls.

System was not evaluated for ability to detect layer of hydrocarbons on water.

Evaluation did not cover any liquid sensors.

Steel Tank Institute Evaluator: Ken Wilcox Associates

570 Oakwood Rd. Tel: (816) 443-2494

Lake Zurich, IL 60047 Date of Evaluation: 04/24/94

Tel: (708) 438-8265
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

260

Revision Date: November 6, 1997

Syscorp, Inc.

Store Vision Version E.2

STATISTICAL INVENTORY RECONCILIATION TEST METHOD (QUALITATIVE)

Certification: Leak rate of 0.2 gph with PD = 95.7% and PFA = 0%.

Leak Threshold: 0.0834 gph. A tank system should not be declared tight if the test result indicates a 

loss or gain that equals or exceeds this threshold.

Applicability: Gasoline, diesel, aviation fuel, fuel oil #4.

Tank Capacity: Maximum of 12,000 gallons.

Data Requirement: Minimum of 29 days of product level and flow through data.

Comments: Not evaluated using manifold tank systems.

Of 120 data sets submitted for evaluation, 32 were inconclusive.

Median monthly throughput of tanks evaluated was 8,097 gallons.

Leak rate of 0.2 gph was used in evaluation.

Data sets evaluated were supplied by evaluator.

Syscorp, Inc. Evaluator: Midwest Research Institute

1513 Huffman Rd., Suite 202 Tel: (816) 753-7600

Birmingham, AL 35215 Date of Evaluation: 09/30/93

Tel: (205) 853-0004
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

261

Revision Date: November 6, 1997

Tank Automation, Inc.

Automated Precision Tank Testing System (APTT System) 

R-2

VOLUMETRIC TANK TIGHTNESS TEST METHOD (OVERFILL)

Certification: Leak rate of 0.1 gph with PD = 99% and PFA = 1%.

Leak Threshold: 0.05 gph. A tank system should not be declared tight if the test result indicates a loss 

or gain that equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel, fuel oils #4 and #6, waste oil, solvents, other compatible 

products.

Tank Capacity: Maximum of 15,000 gallons.

Tank must be minimum 100% full.

Waiting Time: Minimum of 10 hours, 30 minutes between delivery and testing. 

Minimum of 2 hours, 30 minutes between "topping off" and testing.

There must be no dispensing or delivery during waiting time.

Test Period: Minimum of 1 hour.

Test data are acquired and recorded manually for level measurement and by computer 

for temperature measurement.

Leak rate is calculated from last 1 hour of test period data.

There must be no dispensing or delivery during test.

Temperature: Average for product is determined by a minimum of 10 thermistors.

Groundwater: Groundwater presence must be determined to a depth of 5 feet below grade in

backfill. Product level must be a minimum of 5 feet 6 inches above grade to ensure a 

minimum net pressure of 1 psi at bottom of tank during test.

Calibration: Thermistors and level sensors must be checked annually and calibrated if necessary.

Comments: Not evaluated using manifold tank systems.

Tank Automation, Inc. Evaluator: Wildwood Engineering

P.O. Box 1395 Tel: Not Available

Wall, NJ 07719 Date of Evaluation: 11/14/90

Tel: (800) 762-4103
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

262

Revision Date: November 14, 1997

Tanknology - NDE 

Proline Test Series III, Version 1.0

LINE TIGHTNESS TEST METHOD

Certification: Leak rate of 0.1 gph with PD = 99.0% and PFA = 0.1%. 

Leak Threshold: 0.05 gph. A pipeline system should not be declared tight if the test result indicates 

a loss that equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel, fuel oils #4 and #6, solvents.

Specification: System tests fiberglass and steel pipelines.

Tests are conducted at 150% operating pressure. 

Mechanical line leak detector must be removed from pipeline for duration of test.

Pipeline Capacity: Maximum of 41 gallons.

Waiting Time: None between delivery and testing

Minimum of 1 hour between dispensing and testing.

Test Period: Minimum of 1 hour. 

Pipe deflection, vapor pockets, and large temperature differences may produce 

inconsistent readings, testing to continue until stable conditions are present.

Test data are acquired and recorded manually.

Manual calculations are performed by the operator on site.

Calibration: Sensors must be calibrated before each test.

Tanknology - NDE Evaluator: Midwest Research Institute

8900 Shoal Creek Blvd., Building 200 Tel: (816) 753-7600

Austin, TX 78757 Date of Evaluation: 08/30/91

Tel: (800) 800-4633
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

263

Revision Date: November 14, 1997

Tanknology - NDE 

PTK-88

LINE TIGHTNESS TEST METHOD

Certification: Leak rate of 0.1 gph with PD = 99.8% and PFA = 1.3%.

Leak Threshold: 0.05 gph. A pipeline system should not be declared tight if the test result indicates 

a loss that equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel, fuel oil, solvents.

Specification: System tests fiberglass and steel pipelines.

Tests are conducted at 150% operating pressure.

Mechanical line leak detector must be removed from pipeline for duration of test.

Pipeline Capacity: Maximum of 40 gallons.

Waiting Time: None between delivery and testing.

Minimum of 1 hour between dispensing and testing.

Test Period: Minimum of 10 minutes. Repeat 10 minute cycles are necessary if data does not 

meet the manufacturer’s criteria. 

Test data are acquired and recorded manually. 

Manual calculations are performed by the operator on site.

Calibration: Sensors must be calibrated before each test.

Tanknology - NDE Evaluator: Midwest Research Institute

8900 Shoal Creek Blvd., Building 200 Tel: (816) 753-7600

Austin, TX 78757 Date of Evaluation: 02/14/91

Tel: (800) 800-4633
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

264

Revision Date: November 14, 1997

Tanknology - NDE

TLD-1

LINE TIGHTNESS TEST METHOD

Certification: Leak rate of 0.1 gph with PD = 99.5% and PFA = 0.5%.

Leak Threshold: 0.05 gph. A pipeline system should not be declared tight if the test result indicates 

a loss that equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel.

Specification: System tests fiberglass and steel pipelines.

Tests are conducted at 150% operating pressure.

Mechanical line leak detector must be removed from pipeline for duration of test.

Pipeline Capacity: Maximum of 50 gallons.

Waiting Time: Testing may begin immediately after system is installed in the line. 

Test Period: Response time is 30 minutes to 6 hours.

Test may not be ended until pass/fail criteria set by manufacturer has been met.

Pipe deflection, vapor pockets, and large temperature differences may produce 

inconsistent readings. Testing must continue until stable conditions are present.

Test data are acquired and recorded manually.

Tanknology - NDE Evaluator: Ken Wilcox Associates

8900 Shoal Creek Blvd., Building 200 Tel: (816) 443-2494

Austin, TX 78757 Date of Evaluation: 12/29/91

Tel: (800) 800-4633
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

265

Revision Date: November 14, 1997

Tanknology - NDE

UST Ullage Test, Version U2

(Pressure Test)

NON-VOLUMETRIC TANK TIGHTNESS TEST METHOD (ULLAGE)

Certification: Leak rate of 0.1 gph with PD = 95.24% and PFA = 0%. 

Leak Threshold: A tank system should not be declared tight when the pressure decay trend equals or 

exceeds ± 0.016 psi/hr.

Applicability: Gasoline, diesel, aviation fuel, heavy fuel oils #2 through #6, solvents. 

Tank Capacity: Maximum ullage volume is 10,260 gallons.

Waiting time: Minimum of 2 hours between delivery and testing. 

Test Period: Minimum of 30 minutes (after data trend has been established).

Test Pressure: Total pressure of 4.0 psi must be applied at bottom of tank.

Temperature: Ullage must be monitored during test, and a correction factor is applied to account for 

temperature changes. If ullage temperature changes exceed 5 degrees F, test must 

not be conducted.

Groundwater: Depth to groundwater in backfill must be determined. If groundwater is above

product level, net pressure must be maintained at a minimum of 1 psi in the ullage 

during test.

Comments: Not evaluated using manifold tank systems.

Evaluated using diesel fuel.

Tests only ullage portion of tank.

Product-filled portion of tank must be tested using a volumetric underfill test method.

Tanknology - NDE Evaluator: ADA Technologies, Inc.

8900 Shoal Creek Blvd., Building 200 Tel: (303) 792-5615

Austin, TX 78757 Date of Evaluation: 04/10/92

Tel: (800) 800-4633
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

266

Revision Date: November 14, 1997

Tanknology - NDE

UTS-4T Ullage Test

(Pressure Test)

NON-VOLUMETRIC TANK TIGHTNESS TEST METHOD (ULLAGE)

Certification: Leak rate of 0.1 gph with PD = 95.24% and PFA = 0%. 

Leak Threshold: A tank system should not be declared tight when the make-up gas flow rate into 

ullage equals or exceeds 0.275 cubic feet/hour.

Applicability: Gasoline, diesel, aviation fuel, heavy fuel oil #4, solvents. 

Tank Capacity: Maximum ullage volume is 7,500 gallons.

Waiting time: Minimum of 2 hours between delivery and testing. 

Test Period: Minimum of 20 minutes, consisting of 2 consecutive 10-minute test periods. 

Test data are acquired and recorded manually.

Test Pressure: Pressure must be increased in ullage such that total pressure at bottom of tank does 

not exceed 5.0 psi. 

Pressure must be maintained for a minimum of 5 minutes per 1,000 gallons of ullage. 

At conclusion of this stabilization period, ullage pressure must be reduced by 0.5 psi 

for remainder of test.

Temperature: Ullage must be monitored for rate of temperature change, which must not exceed 

manufacturer's tabulated values.

Groundwater: Depth to groundwater in backfill must be determined. If groundwater is above

product level, net pressure must exceed 1 psi in the ullage during test.

If this requires more than 5 psi total pressure at tank bottom, the ullage test must 

not be used.

Comments: Not evaluated using manifold tank systems.

Evaluated using diesel fuel.

Tests only ullage portion of tank.

Product-filled portion of tank must be tested using a volumetric underfill test method.

Tanknology - NDE Evaluator: Midwest Research Institute

8900 Shoal Creek Blvd., Building 200 Tel: (816) 753-7600

Austin, TX 78757 Date of Evaluation: 12/04/92

Tel: (800) 800-4633
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

267

Revision Date: November 14, 1997

Tanknology - NDE

U3 Ullage Test 

(Vacuum or Pressure Test)

NON-VOLUMETRIC TANK TIGHTNESS TEST METHOD (ULLAGE)

Certification: Leak rate of 0.1 gph with PD = 100% and PFA = 0%. 

Leak Threshold: A tank system should not be declared tight when the acoustic signal detected is 

different from the baseline. 

Baseline is the acoustic signal before tank is pressurized or evacuated.

Applicability: Gasoline, diesel, aviation fuel, fuel oils #4 and #6, waste oil, solvents. 

Tank Capacity: Maximum ullage volume is 16,500 gallons. 

Waiting Time: None between delivery and testing

Test Period: A few minutes to determine background noise and a leak.

Depends on background noise at the site and on the size of the leak. 

After the desired pressure has been reached, the tank should be allowed to settle for 

10 minutes.

Test Pressure: Vacuum of 1 psi must be maintained in ullage by a vacuum blower, or total pressure 

at bottom of tank of 4 psi must be maintained using nitrogen.

Temperature: Acoustic signal is independent of product temperature.

Groundwater: Depth to groundwater in backfill must be determined. If groundwater is above product 

level, vacuum test should not be used. 

Pressure test may only be used if net pressure can be maintained at a minimum 

1 psi throughout ullage during test. If this requires more than 5 psi total pressure at 

tank bottom, the ullage test must not be used.

Comments: Not evaluated using manifold tank systems. 

Evaluated using diesel fuel.

Tests only ullage portion of the tank. 

Product-filled portion of tank must be tested with an underfill test method.

Microphone was 25 feet away from the leak source during evaluation.

If background noise is too high, test is inconclusive. 

Noise signals are tape recorded (not digitally recorded).

Vacuum test method may not be effective in some backfill (such as clay) because it 

may plug holes in tank.

If soil is saturated with product, air or water ingress may not be declared by vacuum 

test. A well point in backfill may help identify presence of this condition.

Tanknology - NDE Evaluator: Ken Wilcox Associates

8900 Shoal Creek Blvd., Building 200 Tel: (816) 443-2494

Austin, TX 78757 Date of Evaluation: 01/15/93

Tel: (800) 800-4633
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

268

Revision Date: November 14, 1997

Tanknology - NDE

Quick Test 

(Underfill Test)

NON-VOLUMETRIC TANK TIGHTNESS TEST METHOD(VACUUM)

Certification: Leak rate of 0.1 gph with PD = 100% and PFA = 0%. 

Leak Threshold: A tank system should not be declared tight when the acoustic signal detected is 

different from the baseline.

Baseline is the acoustic signal before tank is evacuated.

Applicability: Gasoline, diesel, aviation fuel, fuel oils #4, waste oil, solvents. 

Tank Capacity: Maximum product volume of 30,000 gallons. Tank product level must be between 7 

and 86 inches.

Waiting Time: None between delivery and testing

Test Period: A few minutes to determine background noise and a leak.

Depends on background noise at the site and on size of leak. 

Test Pressure: Vacuum of 0.5 psi beyond the vacuum required to overcome the tank bottom pressure 

must be maintained in ullage by a vacuum blower.

Net vacuum applied = 0.5 psi + [inches of product level x the specific gravity of 

product x 0.036].

Temperature: Acoustic signal is independent of product temperature.

Groundwater: Depth to groundwater in backfill must be determined. If groundwater is above

the tank bottom, this system may not be used. 

Comments: Not evaluated using manifold tank systems. 

Evaluated using diesel fuel.

Tests only portion of tank containing product. 

Ullage portion of tank must be tested with an ullage test method.

Microphone was 25 feet away from the leak source during evaluation.

If background noise is too high, test is inconclusive. 

Noise signals are tape recorded (not digitally recorded).

Vacuum test method may not be effective in some backfill (such as clay) 

because it may plug holes in tank.

If soil is saturated with product, air or water ingress may not be declared

by vacuum test. A well point in backfill may help identify presence of this condition.

Tanknology - NDE Evaluator : Ken Wilcox Associates

8900 Shoal Creek Blvd., Building 200 Tel: (816) 443-2494

Austin, TX 78757 Date of Evaluation: 06/25/96

Tel: (800) 800-4633
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

269

Revision Date: November 14, 1997

Tanknology - NDE

VacuTect

NON-VOLUMETRIC TANK TIGHTNESS TEST METHOD (VACUUM)

Certification: Leak rate of 0.1 gph with PD = 100% and PFA = 0%. 

Leak Threshold: A tank system should not be declared tight when:

sonic emission of air ingress is detected in ullage area and/or;

sonic emission of bubbles formed by air ingress is detected in product-filled portion of the tank and/or; 

water ingress is detected at the bottom of the tank.

Applicability: Gasoline, diesel, aviation fuel, fuel oil #4, waste oil.

Water miscible products limit the effectiveness of water ingress detection.

Tank Capacity: Maximum of 75,000 gallons.

The test is generally conducted with tank between 60 and 90% full. 

The test may be performed at minimum 5% full if the total ullage volume does not exceed 20,000 gallons.

Waiting Time: None between delivery and testing.

Test Period: Minimum of 1 hour to declare a tank tight (after vacuum is reached) if backfill is dry (no water is detected in 

backfill prior to or at the conclusion of test). 

No specified minimum to declare a tank "non-tight". If water is present in backfill, minimum test period for 

declaring a tank tight is calculated based on the tank size, amount of water present in the tank prior to test, 

tank tilt, type of the water sensor and its location. 

Manufacturer's time charts should be checked for appropriate test periods. 

When test relies on detection of water ingress, minimum test period to declare a tank tight (if the 

measurements are taken at the low end of the tank) is 4 hours for the printed circuit board water sensor 

(test period may be shorter for tanks smaller than 1500 gallons) and 1 hour for the magnetostrictive water 

sensor. When water is present in backfill, an inclinometer must be used to determine and record tank tilt. 

Tank tilt may also be determined by taking readings at both ends of the tank. Water sensor should always 

be used at the low end of the tank. If water measurements are not taken at the low end of tank, extended 

test periods may be required to detect any water ingress.

Test Pressure: Vacuum must not be greater than 0.5 psi at bottom of tank.

Temperature: Sonic emission is independent of product temperature.

Water Sensor: Must be used at the low point of the tank to detect water ingress. 

Magnetostrictive sensor minimum detectable water level is 0.017 inch, and minimum detectable water level 

change is 0.001 inch. 

Printed circuit board sensor minimum detectable water level is 0.022 inch, and minimum detectable water 

level change is 0.016 inch. 

Groundwater: Depth to groundwater in backfill must be determined. If groundwater is above bottom of tank, test time must 

be extended to allow sufficient time to detect water ingress of 0.1 gph. 

Comments: Evaluated for manifold tank systems using two 20,000 gallon tanks during the 02/20/96 evaluation.

Evaluated using gasoline, diesel, and JP-4 .

Microphone should be located within 60 feet from any possible leak source.

Vacuum test method may not be effective in some backfill (such as clay) because it may plug holes in tank.

If soil is saturated with product, air or water ingress may not be detected by vacuum test. 

A well point in backfill may help identify presence of this condition.
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

270

Tanknology - NDE Evaluator: Ken Wilcox Associates

8900 Shoal Creek Blvd., Building 200 Tel: (816) 443-2494

Austin, TX 78757 Dates of Evaluation: 09/08/92, 02/20/92,

Tel: (800) 800-4633 01/18/94, 10/28/91, 02/23/96
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

271

Revision Date: November 14, 1997

Tanknology - NDE

Computerized VPLT Testing System

VOLUMETRIC TANK TIGHTNESS TEST METHOD (UNDERFILL)

Certification: Leak rate of 0.1 gph with PD = 99.9% and PFA = 0.1%.

Leak Threshold: 0.05 gph. A tank system should not be declared tight if the test result indicates a 

loss or gain that equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel, fuel oils #4 and #6, waste oil, solvents, other 

products.

Tank Capacity: Maximum of 18,000 gallons.

Tank must contain minimum 24 inches of product.

Waiting Time: Must be long enough between delivery and testing to ensure a temperature 

change of less than 0.09 degrees F per hour, typically a minimum of 2 hours.

None between dispensing and testing.

There must be no delivery during waiting time.

Test Period: Minimum of 2 hours. 

Test data are acquired and recorded by a computer.

Leak rate is calculated from average over data window.

There must be no dispensing or delivery during test.

Temperature: Average for product is typically determined by 5 thermistors. 

A minimum of 1 thermistor is required.

Groundwater: Depth to groundwater in backfill must be determined. If groundwater is above bottom 

of tank, product level must be adjusted to provide a minimum net pressure of 1 psi at 

bottom of tank during test. (There must be a difference of at least 37 inches between 

groundwater level and product level to provide a net pressure of 1 psi at bottom of tank 

during test.)

Calibration: Thermistors must be checked annually and calibrated if necessary.

Comments: Not evaluated using manifold tank systems.

Tests only portion of tank containing product.

As product level is lowered, leak rate in a leaking tank decreases (due to lower head 

pressure). Consistent testing at low levels could allow a leak to remain undetected.

EPA leak detection regulations require testing of the portion of the tank system which 

routinely contains product.

Tanknology - NDE Evaluator: Ken Wilcox Assoc.

8900 Shoal Creek Blvd., Building 200 Tel: (816) 443-2494

Austin, TX 78757 Date of Evaluation: 02/15/93

Tel: (800) 800-4633
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

272

Revision Date: November 14, 1997

Tanknology - NDE

Sure Test - Assured Tight System, Series IV

VOLUMETRIC TANK TIGHTNESS TEST METHOD (UNDERFILL)

Certification: Leak rate of 0.1 gph with PD = 99.99% and PFA = 0.005%.

Leak Threshold: 0.05 gph. A tank system should not be declared tight if the test result indicates a 

loss or gain that equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel, fuel oil, waste oil, solvents.

Tank Capacity: Maximum of 18,000 gallons.

Tank must be between 11 and 95% full.

Waiting Time: Minimum of 6 hours between delivery and testing. 

None between dispensing and testing.

There must be no delivery during waiting time.

Test Period: Minimum of 3 hours. 

Test data are acquired and recorded by a computer. 

Leak rate is calculated from average of subsets of all collected data.

There must be no dispensing or delivery during test.

Temperature: Average for product is determined by temperature probes.

A minimum 12 inches of product must be present for the temperature probes to 

operate properly.

Groundwater: Depth to groundwater in backfill must be determined. If groundwater is above bottom 

of tank, product level must be adjusted during test to provide a minimum

net pressure of 1 psi at bottom of tank during test. (There must be a difference of at 

least 37 inches between groundwater level and product level to provide a net pressure 

of 1 psi at bottom of tank during test.)

Calibration: Temperature probes and floats must be checked for proper operation prior to each 

test.

Comments: Not evaluated using manifold tank systems.

Tests only portion of tank containing product.

As product level is lowered, leak rate in a leaking tank decreases (due to lower head 

pressure). Consistent testing at low levels could allow a leak to remain undetected.

EPA leak detection regulations require testing of the portion of the tank system which 

routinely contains product.

Tanknology - NDE Evaluator: ADA Technologies

8900 Shoal Creek Blvd., Building 200 Tel: (303) 792-5615

Austin, TX 78757 Date of Evaluation: 09/09/92

Tel: (800) 800-4633
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

273

Revision Date: August 23, 1999

TeleData, Inc.

TankMate Version 3.20

STATISTICAL INVENTORY RECONCILIATION TEST METHOD (QUANTITATIVE)

Certification: Leak rate of 0.1 gph with PD = 99.8% and PFA = 0.02% for both single and 

manifolded tanks.

Leak Threshold: 0.05 gph. A tank system should not be declared tight if the estimated leak rate 

is statistically significant and continuous.

Applicability: Gasoline, diesel, kerosene.

Tank Capacity: Maximum of 60,000 gallons for single tank.

Maximum of 60,000 gallons cumulative capacity for manifold tank systems with 

no more than 3 tanks in the system.

Data Requirement: Minimum of 15 days of data is required.

System Features: Method of data analysis that system employs, and was used during evaluation 

process, is exclusive of any external control by vendor.

System consists of a fully automated software package with embedded 

algorithms for conducting leak detection testing. Consequently, third party 

evaluation procedure demonstrated that system can be used in-house with no 

requirement for direct vendor participation.

Evaluation Features: Evaluator tested this system for in-house use. Computer program disk along 

with instructional documentation was supplied by vendor to evaluator. Evaluator, 

without vendor involvement, analyzed required data and performed evaluation 

using program disk and accompanying documentation. Vendor was NOT present 

as an observer during evaluation.

Comments: 46% of data sets evaluated were from manifold tank systems.

Of 41 data sets submitted for evaluation, all were analyzed with conclusive 

results.

Median monthly throughput of tanks evaluated was 53,349 gallons.

Leak rates of 0.05, 0.10, and 0.20 gph were used in the evaluation.

Data sets evaluated were supplied by the evaluator.

TeleData, Inc. Evaluator: Piotr Blass, Ph,D.

43 East Ocean Blvd. Tel: (407) 369-3467

Stuart, FL 34994 Date of Evaluation: 05/15/97

Tel: (561) 219-4661
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

274
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

275

Revision Date: September 11, 1998

Tidel Engineering, Inc.

LIPSPC-301-0730-001, LIP-301-0729-001

Line Integrity Probe and Submersible Pump Controller 

AUTOMATIC ELECTRONIC LINE LEAK DETECTOR

Certification: Leak rate of 3.0 gph with PD = 100% and PFA = 0%.

Leak Threshold: 2.0 gph. A pipeline system should not be declared tight if the test result indicates a 

loss or gain that equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel.

Specification: System tests pressurized fiberglass and steel pipelines. 

Tests are conducted at operating pressure.

Pipeline Capacity: Maximum of 129 gallons. 

Waiting Time: None between delivery and testing. 

None between dispensing and testing.

Test Period: Response time is 1 minute.

Test data are acquired and recorded by a permanently installed microprocessor.

Calculations are automatically performed by the microprocessor.

System Features: Permanent installation on pipeline.

Automatic testing of pipeline.

Preset threshold.

Single test to determine if pipeline is leaking.

Pump shutdown, message display, and alarm activation if leak is declared.

Calibration: System must be checked annually and calibrated if necessary in accordance 

with manufacturer's instructions.

Tidel Engineering, Inc. Evaluator: Ken Wilcox Associates

2310 McDaniel Dr. Tel: (816) 443-2494

Carrollton, TX 75006 Date of Evaluation: 02/02/93

Tel: (800) 678-7577
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

276

Revision Date: September 11, 1998

Tidel Engineering, Inc.

LIPSPC-301-0730-001, LIP-301-0729-001

Line Integrity Probe and Submersible Pump Controller 

AUTOMATIC ELECTRONIC LINE LEAK DETECTOR

Certification: Leak rate of 0.1 gph with PD = 100% and PFA = 0%.

Leak Threshold: 0.06 gph. A pipeline system should not be declared tight if the test result indicates 

a loss that equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel.

Specification: System tests pressurized fiberglass and steel pipelines. 

Tests are conducted at operating pressure.

Pipeline Capacity: Maximum of 129 gallons. 

Waiting Time: None between delivery and testing. 

None between dispensing and testing.

Test Period: Response time is 1 hour, 30 minutes.

Test data are acquired and recorded by a permanently installed microprocessor.

Calculations are automatically performed by the microprocessor.

System Features: Permanent installation on pipeline.

Automatic testing of pipeline.

Preset threshold.

Single test to determine if pipeline is leaking.

Pump shutdown, message display, and alarm activation if leak is declared.

Calibration: System must be checked annually and calibrated if necessary in accordance 

with manufacturer's instructions.

Tidel Engineering, Inc. Evaluator: Ken Wilcox Associates

2310 McDaniel Dr. Tel: (816) 443-2494

Carrollton, TX 75006 Date of Evaluation: 02/02/93

Tel: (800) 678-7577
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

277

Revision Date: September 11, 1998

Tidel Engineering, Inc.

Tidel Environmental Monitoring System, 3500 Series

(Ultrasonic Probes #401-0009, #401-0010 and #401-0023)

AUTOMATIC TANK GAUGING METHOD

Certification: Leak rate of 0.2 gph with PD = 95.3% and PFA = 4.7% for 2 hour test.

Leak rate of 0.2 gph with PD = 99.5% and PFA = 0.5% for 4 hour test.

Leak Threshold: 0.1 gph. A tank system should not be declared tight if the test result indicates a loss 

or gain that equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel, fuel oil. 

Other liquids may be tested after consultation with the manufacturer.

Tank Capacity: Maximum of 15,000 gallons.

Tank must be between 50 and 95% full.

Waiting Time: Minimum of 2 hours, 29 minutes between delivery and testing.

Minimum of 15 minutes after dispensing.

There must be no delivery during waiting time.

Test Period: Minimum of 2 hours to achieve PD = 98.6% and PFA = 1.4%.

Minimum of 4 hours to achieve PD = 99.5% and PFA = 0.5%.

Test data are acquired and recorded by the microprocessor contained within the EMS 

console.

Leak rate is calculated from data determined to be valid by statistical analysis.

There must be no dispensing or delivery during test.

Temperature: Average for product is determined from the measurement of the change in the speed 

of sound.

Water Sensor: Must be used to detect water ingress.

Minimum detectable water level in the tank is 1.48 inches.

Minimum detectable water level change is 0.035 inch.

Calibration: Temperature sensors and ultrasonic probe must be checked and calibrated in 

accordance with manufacturer's instructions.

Comments: The water sensor, temperature sensor, and product level monitor are contained 

in a single ultrasonic probe.

Not evaluated using manifold tank systems.

Tests only portion of tank containing product.

As product level is lowered, leak rate in a leaking tank decreases (due to lower head 

pressure). Consistent testing at low levels could allow a leak to remain undetected.

EPA leak detection regulations require testing of the portion of the tank system which 

routinely contains product.

Tidel Engineering, Inc. Evaluator: Ken Wilcox Associates

2310 McDaniel Dr. Tel: (816) 443-2494

Carrollton, TX 75006 Date of Evaluation: 03/16/95

Tel: (800) 678-7577
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

278

Revision Date: September 11, 1998

Tidel Engineering, Inc.

Tidel Environmental Monitoring System, EMS 2000, 3000, 3500 Series

(Ultrasonic Probes #401-0009 and #401-0010)

AUTOMATIC TANK GAUGING METHOD

Certification: Leak rate of 0.2 gph with PD = 96.2% and PFA = 3%.

Leak Threshold: 0.1 gph. A tank system should not be declared tight if the test result indicates a loss 

or gain that equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel, fuel oil, solvents.

Tank Capacity: Maximum of 15,000 gallons.

Tank must be between 50 and 95% full.

Waiting Time: Minimum of 2 hours between delivery and testing.

There must be no dispensing or delivery during waiting time.

Test Period: Minimum of 6 hours.

Test data are acquired and recorded by a microprocessor contained within the EMS 

console.

Leak rate is calculated from data determined to be valid by statistical analysis.

There must be no dispensing or delivery during test.

Temperature: Average for product is determined by a minimum of 5 temperature sensors.

Water Sensor: Must be used to detect water ingress.

Minimum detectable water level in the tank is 1.48 inches.

Minimum detectable water level change is 0.035 inch.

Calibration: Temperature sensors and ultrasonic probe must be checked and calibrated in 

accordance with manufacturer's instructions.

Comments: Not evaluated using manifold tank systems.

Tests only portion of tank containing product.

As product level is lowered, leak rate in a leaking tank decreases (due to lower head 

pressure). Consistent testing at low levels could allow a leak to remain undetected.

EPA leak detection regulations require testing of the portion of the tank system which 

routinely contains product.

EMS 2000 and 3000 Series are no longer manufactured by Tidel.

Tidel Engineering, Inc. Evaluator: Ken Wilcox Associates

2310 McDaniel Dr. Tel: (816) 443-2494

Carrollton, TX 75006 Date of Evaluation: 06/07/93

Tel: (800) 678-7577
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

279

Revision Date: September 11, 1998

Tidel Engineering, Inc.

Tidel Environmental Monitoring System, EMS 2000, 3000, 3500 Series

(Ultrasonic Probes #401-0021 and #401-0022)

AUTOMATIC TANK GAUGING METHOD

Certification: Leak rate of 0.2 gph with PD = 99.91% and PFA = 0.09%.

Leak Threshold: 0.1 gph. A tank system should not be declared tight if the test result indicates a loss 

or gain that equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel, fuel oil, solvents.

Tank Capacity: Maximum of 15,000 gallons.

Tank must be between 50 and 95% full.

Waiting Time: Minimum of 2 hours between delivery and testing. 

There must be no dispensing or delivery during waiting time.

Test Period: Minimum of 6 hours.

Test data are acquired and recorded by a microprocessor contained within the EMS 

console.

Leak rate is calculated from data determined to be valid by statistical analysis.

There must be no dispensing or delivery during test.

Temperature: Average for product is determined by a minimum of 5 temperature sensors.

Water Sensor: Must be used to detect water ingress.

Minimum detectable water level in the tank is 1.48 inches.

Minimum detectable water level change is 0.035 inch.

Calibration: Temperature sensors and ultrasonic probe must be checked and calibrated in 

accordance with manufacturer's instructions.

Comments: Not evaluated using manifold tank systems.

Tests only portion of tank containing product.

As product level is lowered, leak rate in a leaking tank decreases (due to lower head 

pressure). Consistent testing at low levels could allow a leak to remain undetected.

EPA leak detection regulations require testing of the portion of the tank system which 

routinely contains product.

EMS 2000 and 3000 Series are no longer manufactured by Tidel.

Tidel Engineering, Inc. Evaluator: Ken Wilcox Associates

2310 McDaniel Dr. Tel: (816) 443-2494

Carrollton, TX 75006 Date of Evaluation: 06/07/93

Tel: (800) 678-7577
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

280

Revision Date: September 11, 1998

Tidel Engineering, Inc.

Tidel Environmental Monitoring System, EMS 4000

(Ultrasonic Probe #312-9000)

AUTOMATIC TANK GAUGING METHOD

Certification: Leak rate of 0.2 gph with PD = 97.4% and PFA = 2.6% for 2 hour test.

Leak rate of 0.2 gph with PD = 99.9% and PFA = 0.1% for 4 hour test.

Leak Threshold: 0.1 gph. A tank system should not be declared tight if the test result indicates a loss 

or gain that equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel, fuel oil.

Other liquids may be tested after consultation with the manufacturer.

Tank Capacity: Maximum of 15,000 gallons.

Tank must be between 50 and 95% full.

Waiting Time: Minimum of 2 hours, 29 minutes between delivery and testing.

Minimum of 15 minutes between dispensing and testing.

There must be no delivery during waiting time.

Test Period: Minimum of 2 hours to achieve PD = 97.4% and PFA = 1.8%.

Minimum of 4 hours to achieve PD = 99.9% and PFA = 0.1%.

Test data are acquired and recorded by the microprocessor contained within the EMS 

console.

Leak rate is calculated from data determined to be valid by statistical analysis.

There must be no dispensing or delivery during test.

Temperature: Average for product is determined from the measurement of the change in the speed 

of sound.

Water Sensor: Must be used to detect water ingress.

Minimum detectable water level in the tank is 1.045 inches.

Minimum detectable water level change is 0.053 inch.

Calibration: Gain adjustment on probe must be checked annually and calibrated in accordance 

with manufacturer's instructions.

Comments: Not evaluated using manifold tank systems.

Tests only portion of tank containing product.

As product level is lowered, leak rate in a leaking tank decreases (due to lower head 

pressure). Consistent testing at low levels could allow a leak to remain undetected.

EPA leak detection regulations require testing of the portion of the tank system which 

routinely contains product.

This is a longer version of model #312-9001.

Tidel Engineering, Inc. Evaluator: Ken Wilcox Associates

2310 McDaniel Dr. Tel: (816) 443-2494

Carrollton, TX 75006 Date of Evaluation: 03/16/95

Tel: (800) 678-7577
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

281

Revision Date: September 11, 1998

Tidel Engineering, Inc.

Tidel Environmental Monitoring System, EMS 4000

(Ultrasonic Probe #312-9000)

AUTOMATIC TANK GAUGING METHOD

Certification: Leak rate of 0.1 gph with PD = 98.6% and PFA = 1.4% for 5 hour test. 

Leak rate of 0.1 gph with PD = 99.7% and PFA = 0.3% for 6 hour test.

Leak Threshold: 0.05 gph. A tank system should not be declared tight if the test result indicates a 

loss or gain that equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel, fuel oil.

Other liquids may be tested after consultation with the manufacturer.

Tank Capacity: Maximum of 15,000 gallons.

Tank must be between 50 and 95% full.

Waiting Time: Minimum of 2 hours, 29 minutes between delivery and testing.

Minimum of 15 minutes between dispensing and testing.

There must be no delivery during waiting time.

Test Period: Minimum of 5 hours to achieve PD = 98.6% and PFA = 1.4%.

Minimum of 6 hours to achieve PD = 99.7% and PFA = 0.3%.

Test data are acquired and recorded by the microprocessor contained within the EMS 

console.

Leak rate is calculated from data determined to be valid by statistical analysis.

There must be no dispensing or delivery during test.

Temperature: Average for product is determined from the measurement of the change in the speed 

of sound.

Water Sensor: Must be used to detect water ingress.

Minimum detectable water level in the tank is 1.045 inches.

Minimum detectable water level change is 0.053 inch.

Calibration: Gain adjustment on probe must be checked annually and calibrated in accordance 

with manufacturer's instructions.

Comments: Not evaluated using manifold tank systems.

Tests only portion of tank containing product.

As product level is lowered, leak rate in a leaking tank decreases (due to lower head 

pressure). Consistent testing at low levels could allow a leak to remain undetected.

EPA leak detection regulations require testing of the portion of the tank system which 

routinely contains product.

This is a longer version of model #312-9001.

Tidel Engineering, Inc. Evaluator: Ken Wilcox Associates

2310 McDaniel Dr. Tel: (816) 443-2494

Carrollton, TX 75006 Date of Evaluation: 03/16/95

Tel: (800) 678-7577
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

282

Revision Date: September 11, 1998

Tidel Engineering, Inc.

Tidel Environmental Monitoring System, EMS 4000

(Ultrasonic Probe #312-9001)

AUTOMATIC TANK GAUGING METHOD

Certification: Leak rate of 0.2 gph with PD = 99.9% and PFA = 0.1%.

Leak Threshold: 0.1 gph. A tank system should not be declared tight if the test result indicates a loss 

or gain that equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel, fuel oil.

Other liquids may be tested after consultation with the manufacturer.

Tank Capacity: Maximum of 15,000 gallons.

Tank must be between 50 and 95% full.

Waiting Time: Minimum of 2 hours, 23 minutes between delivery and testing.

Minimum of 15 minutes between dispensing and testing.

There must be no delivery during waiting time.

Test Period: Minimum of 2 hours.

Test data are acquired and recorded by the microprocessor contained within the EMS 

console.

Leak rate is calculated from data determined to be valid by statistical analysis.

There must be no dispensing or delivery during test.

Temperature: Average for product is determined from the measurement of the change in the speed 

of sound.

Water Sensor: Must be used to detect water ingress.

Minimum detectable water level in the tank is 1.045 inches.

Minimum detectable water level change is 0.053 inch.

Calibration: Gain adjustment on probe must be checked annually and calibrated in accordance 

with manufacturer's instructions.

Comments: Not evaluated using manifold tank systems.

Tests only portion of tank containing product.

As product level is lowered, leak rate in a leaking tank decreases (due to lower head 

pressure). Consistent testing at low levels could allow a leak to remain undetected.

EPA leak detection regulations require testing of the portion of the tank system which 

routinely contains product.

This is a shorter version of model #312-9000.

Tidel Engineering, Inc. Evaluator: Ken Wilcox Associates

2310 McDaniel Dr. Tel: (816) 443-2494

Carrollton, TX 75006 Date of Evaluation: 03/16/95

Tel: (800) 678-7577
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

283

Revision Date: September 11, 1998

Tidel Engineering, Inc.

Tidel Environmental Monitoring System, EMS 4000

(Ultrasonic Probe #312-9001)

AUTOMATIC TANK GAUGING METHOD

Certification: Leak rate of 0.1 gph with PD = 97.9% and PFA = 2.1%.

Leak Threshold: 0.05 gph. A tank system should not be declared tight if the test result indicates a 

loss or gain that equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel, fuel oil.

Other liquids may be tested after consultation with the manufacturer.

Tank Capacity: Maximum of 15,000 gallons.

Tank must be between 50 and 95% full.

Waiting Time: Minimum of 2 hours, 23 minutes between delivery and testing.

Minimum of 15 minutes between dispensing and testing.

There must be no delivery during waiting time.

Test Period: Minimum of 4 hours.

Test data are acquired and recorded by the microprocessor contained within the EMS 

console.

Leak rate is calculated from data determined to be valid by statistical analysis.

There must be no dispensing or delivery during test.

Temperature: Average for product is determined from the measurement of the change in the speed 

of sound.

Water Sensor: Must be used to detect water ingress.

Minimum detectable water level in the tank is 1.045 inches.

Minimum detectable water level change is 0.053 inch.

Calibration: Gain adjustment on probe must be checked annually and calibrated in accordance 

with manufacturer's instructions.

Comments: Not evaluated using manifold tank systems.

Tests only portion of tank containing product.

As product level is lowered, leak rate in a leaking tank decreases (due to lower head 

pressure). Consistent testing at low levels could allow a leak to remain undetected.

EPA leak detection regulations require testing of the portion of the tank system which 

routinely contains product.

This is a shorter version of the model #312-9000.

Tidel Engineering, Inc. Evaluator: Ken Wilcox Associates

2310 McDaniel Dr. Tel: (816) 443-2494

Carrollton, TX 75006 Date of Evaluation: 03/16/95

Tel: (800) 678-7577
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

284

Revision Date: August 23, 1999

Tidel Engineering, Inc.

EMS-3500

Liquid Discriminatory Probes Part 301-0635, Containment Sump Probes Part 301-0642, 

Tidel Detector No. 301-0752-001

LIQUID-PHASE INTERSTITIAL DETECTOR

Detector:

Output type: qualitative

Sampling frequency: continuous

Operating principle: electrical conductivity/hydrocarbon sensitive polymer (Liquid Discriminatory Probes 

Part 301-0635), magnetic switch/float and hydrocarbon sensitive polymer 

(Containment Sump Probes Part 301-0642), float switch (Tidel Detector No. 301-

0752-001)

Test Results:

Liquid Discriminatory Probes Part 301-0635 unleaded gasoline water

Response time (min) 3.59 0.96

Recovery time (min) 13.18 <1

Product activation height (cm) 1.76 0.49

Lower detection limit (cm) 4.19 1.52

Containment Sump Probes Part 301-0642 low high

Response time (min) 6.39 4.76 4.12

Recovery time (min) >60 <1 <1

Product activation height (cm) 2.27 4.31 19.22

Lower detection limit (cm) 2.32 4.31 N/A*

50% by weight ethylene 

glycol in water

30% by weight 

calcium chloride in water

Tidel Detector No. 301-0752-001 Up down up down

Response time (min) 21.91 30.10 22.27 31.08

Recovery time (min) <1 <1 <1 <1

Product activation height (cm) 28.92 2.75 28.82 2.48

See Glossary* 

Specificity Results (in addition to above for Liquid Discriminatory Probes Part 301-0635 and 

Containment Sump Probes Part 301-0642):

Activated: synthetic gasoline, diesel fuel, heating oil #2.

Comments:

Liquid Discriminatory Probes Part 301-0635 and Tidel Detector No. 301-0752-001 are reusable.

Containment Sump Probes Part 301-0642 was tested to determine its capability of detecting hydrocarbons 

floating on water. A Lower detection limit thickness of 0.04 cm was declared, on average, in 16 minutes, 

41 seconds with recovery time averaging 12 minutes, 55 seconds.

Tidel Detector No. 301-0752-001 is intended to monitor the level of either ethylene glycol or calcium 

chloride solutions in interstitial or annular space of a double-walled tank. Detector activates an alarm if 

any significant gain or loss of solution occurs. 

Tidel Engineering, Inc. Evaluator: Carnegie Mellon Research Institute

2310 McDaniel Dr. Tel: (412) 268-3495

Carrollton, TX 75006 Dates of Evaluation: 01/29/93, 02/17/93,

Tel: (800) 678-7577 04/20/93
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

285

Revision Date: August 23, 1999

Tidel Engineering, Inc.

EMS-3500

Monitoring Well Probe Part 301-0641, Sheen Probes Part 301-0687, Tidel Detector No. 301-0762

LIQUID-PHASE OUT-OF-TANK PRODUCT DETECTOR

Detector:

Output type: qualitative

Sampling frequency: continuous

Operating principle: conductivity via resistor ladder network (Monitoring Well Probe Part 301-0641), 

electrical conductivity/hydrocarbon sensitive polymer (Sheen Probes Part 301-0687 

and Tidel Detector No. 301-0762).

Test Results:

Monitoring Well Probe Part 301-0641 unleaded gasoline synthetic gasoline

Detection time (min:sec) 0:04 0:07

Fall time (min) <1 <1

Lower detection limit (cm) 0.32 0.32

Sheen Probes Part 301-0687

Detection time (min:sec) 7:45 3:35

Fall time (min:sec) 18:01 16:57

Lower detection limit (cm) 0.02 0.04

Tidel Detector No. 301-0762

Detection time (min:sec) 9:31 7:05

Fall time (min:sec) 55:42 17:04

Lower detection limit (cm) 0.04 0.08

Specificity Results (in addition to above):

Activated: n-hexane, diesel fuel, jet-A fuel, JP-4 jet fuel (except Sheen Probes Part 301-0687), toluene, 

xylene(s).

Comments:

Sensors are reusable.

Tidel Engineering, Inc. Evaluator: Carnegie Mellon Research Institute

2310 McDaniel Dr. Tel: (412) 268-3495

Carrollton, TX 75006 Dates of Evaluation: 02/02/93, 01/31/93,

Tel: (800) 678-7577 03/18/93
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

286

Revision Date: August 23, 1999

Tidel Engineering, Inc.

Tidel Detector Nos. 301-0324-001, 301-0325-001, 301-0326-001, 301-0326-002

LIQUID-PHASE OUT-OF-TANK PRODUCT DETECTOR

Detector:

Output type: qualitative

Sampling frequency: continuous

Operating principle: electrical conductivity

Test Results:

Tidel Detector Nos. 301-0324-001, 

301-0325-001

unleaded gasoline synthetic gasoline JP-4 jet fuel

Detection time (sec) 2 2 1

Fall time (sec) 1 2 2

Lower detection limit (cm) 0.16-0.32 0.16-0.32 0.16-0.32

Tidel Detector Nos. 301-0326-001, 

301-0326-002

Detection time (sec) 4 7 2

Fall time (sec) 3 4 4

Lower detection limit (cm) 0.08-0.32 0.08-0.32 0.08-0.32

Specificity Results (in addition to above):

Activated: n-hexane, diesel fuel, jet-A fuel, toluene, xylene(s).

Manufacturer’s specifications:

Tidel Detector No.301-0324-001

Application: Liquid sensor, water, used in 4" monitoring well.

Sensor: Magnetism and conductivity pins.

Detection Range: 1/8" floating product on groundwater or 1.5" free product.

Tidel Detector No.301-0325-001

Application: Liquid sensor, water or hydrocarbon used in reservoir, sump or pipeline trench.

Sensor: Magnetism and conductivity pins.

Detection Range: 1/8" floating product on groundwater or 1.5" free product.

Tidel Detector No.301-0326-001

Application: Liquid sensor, water, used in 2" monitoring well.

Sensor: Magnetism and conductivity pins.

Detection Range: 1/8" floating product on groundwater or 2.5" free product.

Tidel Detector No.301-0326-002

Application: Liquid sensor, water, used in annulus of double wall steel tanks.

Sensor: Magnetism and conductivity pins.

Detection Range: 1/8" floating product on groundwater or 2.5" free product.

Comments:

Sensors are reusable.

Tidel Engineering, Inc. Evaluator: Radian Corp.

2310 McDaniel Dr. Tel: (512) 454-4797

Carrollton, TX 75006 Date of Evaluation: 07/08/91

Tel: (800) 678-7577
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

287

Revision Date: August 23, 1999

Tidel Engineering, Inc.

EMS-3000

301-0328-001, 301-0330-001

and

EMS-3500

Vapor Sensor Probe Part No. 301-0634

VAPOR-PHASE OUT-OF-TANK PRODUCT DETECTOR

Detector:

Output type: qualitative

Sampling frequency: continuous

Operating principle: adsistor

Test Results:

EMS-3000

301-0328-001, 301-0330-001 unleaded gasoline synthetic gasoline JP-4 jet fuel

Detection time (min:sec) 1:31 1:05 1:26

Fall time (min:sec) 5:39 4:23 9:38

Lower detection limit (ppm) 10 to 100 10 to 500 10 to 50

EMS-3500

Vapor Sensor Probe Part No. 301-0634

Detection time (min:sec) 2:46 1:41 1:50

Fall time (hr)* >1 >1 >1

Lower detection limit (ppm) 100 500 100

* The vapor sensor probe was recalibrated when it did not recover, after 1 hour, from exposure to test 

vapors.

Specificity Results (in addition to above for EMS-3000 301-0328-001, 301-0330-001):

Activated: toluene, xylene(s)

Not Activated: n-hexane.

Specificity Results (in addition to above for EMS-3500 Vapor Sensor Probe Part No. 301-0634):

Activated: n-hexane, toluene, xylene(s).

Manufacturer’s specifications:

EMS-3500 Vapor Sensor Probe Part No. 301-0634 is for use in normally dry monitoring wells to detect 

hydrocarbon vapors. It can be used in monitoring wells up to 20 feet deep. The probe will alarm if it 

comes in contact with water and must be removed immediately to prevent damage to probe.

Tidel Engineering, Inc. Evaluator: Radian Corp.

2310 McDaniel Dr. Tel: (512) 454-4797

Carrollton, TX 75006 Dates of Evaluation: 07/08/91, 03/18/93

Tel: (800) 678-7577
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

288

Revision Date: November 6, 1997

Tokheim Corp.

Tokheim Pressure Monitor, Models PM 101, 585A-PM

AUTOMATIC MECHANICAL LINE LEAK DETECTOR

Certification: Leak rate of 3.0 gph with PD = 100% and PFA = 0%. 

Leak Threshold: 2.25 gph. A pipeline system should not be declared tight if the test result indicates 

a loss that equals or exceeds this threshold. 

Applicability: Gasoline, diesel, alcohols.

Specification: System tests pressurized fiberglass and steel pipelines.

Tests are conducted at 150% operating pressure.

Pipeline Capacity: Maximum of 78 gallons.

Waiting Time: None between delivery and testing.

None between dispensing and testing.

Test Period: Response time is 4 seconds.

System Features: Permanent installation on pipeline.

Automatic testing of pipeline.

Preset threshold.

Single test to determine if pipeline is leaking.

Restricted flow to dispenser if leak is declared.

Calibration: System must be checked semi-annually and calibrated if necessary in accordance 

with manufacturer's instructions.

Comments: No longer manufactured by Tokheim Corporation.

Tokheim Corp. Evaluator: Vista Research

10501 Corporate Dr. Tel: (415) 966-1171

Fort Wayne, IN 46801-0360 Date of Evaluation: 11/02/90

Tel: (219) 423-2552
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

289

Revision Date: November 6, 1997

Tracer Research Corp.

Tracer Tight Line Test

LINE TIGHTNESS TEST METHOD

Certification: Leak rate of 0.1 gph with PD = 100% and PFA =0.0%.

Leak Threshold: A pipeline system should not be declared tight when tracer chemical is detected 

outside of the pipeline.

Applicability: All fluid petroleum products and any other fluid with which an acceptable tracer is 

compatible. 

Pipeline Capacity: There is no volume limitation with this system.

Waiting Time: Minimum is normally 2 weeks after injection of the tracer into the tank, but must be 

no less than 1 week, and no more than 4 weeks. For very large pipeline systems, 

several days or weeks may be required to circulate tracer-labeled fuel through all 

parts of the pipeline. Under these circumstances the 1 week waiting time begins 

after the tracer reaches the pipeline being tested.

Tracer Dosage: Dosage of tracer is a factor of tank size and frequency of tank refills according to 

manufacturer's recommendations. 

Tracer labeled product should be circulated through the pipeline before test period 

begins. 

Pressurized pipeline must be brought up to operating pressure or operated on a daily 

basis.

Permeability: Soil permeability must be sufficient for transport of tracer through backfill 

(greater than 1 Darcy).

Probe: Radius of influence of each probe is 10 feet. Locating pipelines should be done 

according to manufacturer’s operating procedures for pipeline test results to be 

valid.

Comments: Presence of frozen, saturated soil surrounding the pipeline may limit effectiveness of 

this system.

Presence of groundwater surrounding pipeline may also reduce effectiveness of 

system (e.g. when applied to pipelines containing water-miscible products or 

products whose specific gravity is greater than 1).

Tracer Research Corp. Evaluator: Ken Wilcox Associates

3755 N. Business Center Dr. Tel: (816) 443-2494 

Tucson, AZ 85705 Date of Evaluation: 10/04/91

Tel: (800) 989-9929 Evaluator: Control Strategies Engineering

Tel: (602) 682-8726

Date of Evaluation: 05/92
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

290

Revision Date: November 6, 1997

Tracer Research Corp.

Tracer Tight

NON-VOLUMETRIC TANK TIGHTNESS TEST METHOD (TRACER)

Certification: Leak rate of 0.1 gph with PD = 100% and PFA = 0%. 

Leak Threshold: A tank system should not be declared tight when tracer chemical is detected outside 

of the tank system.

Applicability: All fluid petroleum products and any other fluid with which an acceptable tracer is 

compatible. 

Tank Capacity: This system is not limited by capacity, however only portions of the tank system 

within 10 feet of sample collection point are tested. 

Waiting Time: Ranges from 7 to 30 days (generally two weeks) after injection of the tracer into the 

tank.

Tracer Dosage: Dosage of tracer is a factor of tank size and frequency of tank refills according to 

manufacturer's recommendations. 

Permeability: Soil permeability must be sufficient for transport of tracer through backfill 

(greater than 1 Darcy).

Probe: Radius of influence of each probe is 10 feet. Probes must be placed such that all 

possible locations and orientations are within the circle of influence.

Groundwater: Depth to groundwater in backfill must be determined. In order for a leak below 

groundwater to be indicated by the release of the tracer compound, the hydrostatic 

pressure of product in tank must exceed the hydrostatic pressure of groundwater 

during test. This is done by maintaining product level at least 6 inches over 

groundwater for a minimum 17 hours during first three days following addition of tracer 

to tank.

In high groundwater situations, this system may be supplemented with measurement 

of water ingress, at the discretion of the regulatory agency.

Comments: Presence of frozen, saturated soil above bottom of tank may limit effectiveness of this 

system.

Presence of groundwater above bottom of tank may also limit effectiveness of test 

method (e.g. when applied to tanks containing water- miscible products or products 

whose specific gravity is greater than 1).

Tracer Research Corp. Evaluator: Ken Wilcox Associates

3755 N. Business Center Dr. Tel: (816) 443-2494

Tucson, AZ 85705 Date of Evaluation: 10/04/90

Tel: (800) 989-9929 Evaluator: Control Strategies Engineering

Tel: (602) 682-8726

Date of Evaluation: 05/92
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

291

Revision Date: August 23, 1999

Tracer Research Corp.

Tracer Tight

VAPOR-PHASE OUT-OF-TANK PRODUCT DETECTOR

Detector:

Output type: quantitative

Sampling frequency: intermittent

Operating principle: chromatographic (looks for chemical tracer)

Test Results:

Hydrocarbon detector 

(GC/FID) xylene benzene 2-methylbutane

unleaded 

gasoline

chemical

tracers

Accuracy (%) <20 <20 <20 <20 N/R*

Bias (%) 0 0 0 0 N/R

Detection time (sec) <1 <1 <1 <1 N/R

Fall time (sec) <1 <1 <1 <1 N/R

Lower detection limit (ppm) 20 20 20 20 N/R

Tracer Detector

Accuracy (%) N/R N/R N/R N/R <20

Bias (%) N/R N/R N/R N/R 0

Detection time (sec) N/R N/R N/R N/R <1

Fall time (sec) N/R N/R N/R N/R <1

Lower detection limit (ppm) N/R N/R N/R N/R 10-5

* See glossary.

Manufacturer’s specifications:

Soil permeability at the site must exceed 1 Darcy.

Comments:

System utilizes a chromatographic measurement of a vapor sample collected monthly from the site. 

Hydrocarbon vapors and the added chemical tracer can be measured independently. 

During evaluations, the tracer chemical was declared 159 out of 161 trials. 

System evaluation included detectors, analytical procedures, sample containers, sampling procedures, 

sampling system, monitoring well materials and installations, and tracer mobility.

Tracer Research Corp. Evaluator: Control Strategies Engineering

3755 N. Business Center Dr. Tel: (602) 682-8726

Tucson, AZ 85705 Date of Evaluation: 05/05/92

Tel: (800)989-9929
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

292

Revision Date: November 6, 1997

Triangle Environmental, Inc.

TEI Model LT-3, Version 1.0 

LINE TIGHTNESS TEST METHOD

Certification: Leak rate of 0.1 gph with PD = 100.0% and PFA = 0%.

Leak Threshold: 0.05 gph. A pipeline system should not be declared tight if the test result indicates 

a loss that equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel, fuel oils #4 and #6, waste oil, solvents.

Specification: System tests fiberglass and steel pipelines.

Tests are conducted at 150% operating pressure.

Pipeline Capacity: Maximum of 80 gallons.

Waiting Time: None between delivery and testing. 

Minimum of 15 minutes between dispensing and testing.

Test Period: Minimum of 15 minutes.

Test data are acquired and recorded manually.

Manual calculations are performed by the operator on site. 

Temperature: Product change per hour must be less than 4 degrees F.

Calibration: Sensors must be checked annually and calibrated semi-annually in accordance with 

manufacturer's instructions.

Triangle Environmental, Inc. Evaluator: United States Testing Company

2525 W. Burbank Blvd. Tel: (213) 723-7181

Burbank, CA 91505 Date of Evaluation: 03/03/92

Tel: (818) 840-7020
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

293

Revision Date: November 6, 1997

Triangle Environmental, Inc.

TEI Ullage Test, Version 1.0 (Vacuum Test)

NON-VOLUMETRIC TANK TIGHTNESS TEST METHOD (ULLAGE)

Certification: Leak rate of 0.1 gph with PD = 100% and PFA = 0%. 

Leak Threshold: A tank system should not be declared tight when an increase in the acoustic noise 

level (above background) of the tank under vacuum is detected due to air or water 

ingress. 

Applicability: Gasoline, diesel, aviation fuel, fuel oil #4, solvents, light liquids.

Tank Capacity: Maximum ullage volume is 15,000 gallons.

Microphone should be located within 24 feet of all points within the ullage.

Waiting Time: None if test is conducted after the underfilled tank test.

Test Period: Minimum of 1 minute.

Test Pressure: Vacuum of 1 psi must be maintained in ullage.

If vacuum cannot be maintained, see manufacturer’s instructions.

Temperature: Acoustic signal is independent of product temperature.

Groundwater: Depth to the groundwater in backfill must be determined. If groundwater is above 

product level, vacuum must be adequate to detect an ingress of groundwater.

Calibration: Sensors must be calibrated before each test.

Comments: Manifold tank systems must be isolated prior to test.

Evaluated using unleaded gasoline.

Tests only ullage portion of tank.

Product-filled portion of tank must be tested using an underfill test method.

Microphone was 24 feet away from the leak source during evaluation.

Headphones are used during test to listen for the signal of air ingress.

Noise signals are tape recorded (not digitally recorded).

Test method may not be effective in some backfill (such as clay) because it may plug 

holes in tank.

If soil is saturated with product, air or water ingress may not be declared by vacuum 

test. A well point in backfill may help identify presence of this condition.

Triangle Environmental, Inc. Evaluator: United States Testing Co. Inc.

2525 W. Burbank Blvd. Tel: (213) 723-7181

Burbank, CA 91505 Date of Evaluation: 05/05/93

Tel: (818) 840-7020
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

294

Revision Date: November 6, 1997

Triangle Environmental, Inc.

TEI System 5000, Version 1.0

NON-VOLUMETRIC TANK TIGHTNESS TEST METHOD (VACUUM)

Certification: Leak rate of 0.1 gph with PD = 100% and PFA = 0%. 

Leak Threshold: A tank system should not be declared tight when the acoustic noise level of the tank 

under vacuum is greater than the calibrated background acoustic noise level 

(prior to evacuation). 

Applicability: Gasoline, diesel, aviation fuel, fuel oil #4, solvents, light liquids.

Tank Capacity: Maximum of 20,000 gallons. 

Tank must be minimum 14% full. 

Microphone should be located within 24 feet of all points within the tank. 

Waiting Time: None between delivery and testing. 

Test Period: Minimum of 1 minute. 

Test Pressure: Vacuum of 1 psi must be maintained in ullage.

If vacuum cannot be maintained, see manufacturer’s instructions.

Temperature: Acoustic signal is independent of product temperature.

Groundwater: Depth to groundwater in backfill must be determined. 

This system cannot be used if groundwater is above bottom of tank.

Calibration: Sensor must be calibrated before each test. 

Comments: Manifold tank systems must be isolated prior to test.

Evaluated using unleaded gasoline.

Microphone was 24 feet away from the leak source during evaluation.

Headphones are used during test to listen for the signal of air ingress.

Noise signals are tape recorded (not digitally recorded).

Vacuum test method may not be effective in some backfill (such as clay) because it 

may plug holes in tank.

If soil is saturated with product, air or water ingress may not be declared by vacuum 

test. A well point in backfill may help identify presence of this condition.

Triangle Environmental, Inc. Evaluator: United States Testing Co., Inc.

2525 W. Burbank Blvd. Tel: (213) 723-7181

Burbank, CA 91505 Date of Evaluation: 02/04/93

Tel: (818) 840-7020
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

295

Revision Date: November 14, 1997

Triangle Environmental, Inc.

TEI System 4000, Version 1.0 

VOLUMETRIC TANK TIGHTNESS TEST METHOD (UNDERFILL)

Certification: Leak rate of 0.1 gph with PD = 99% and PFA = 4.8%.

Leak Threshold: 0.05 gph. A tank system should not be declared tight if the test result indicates a 

loss or gain that equals or exceeds this threshold.

Applicability: Gasoline, diesel, fuel oil, waste oil, solvents.

Tank Capacity: Maximum of 15,000 gallons.

Tank must be between 50 and 100% full.

Waiting Time: Minimum of 6 hours between delivery and testing. 

There must be no dispensing or delivery during waiting time.

Test Period: Minimum is determined by a computer. 

Average was 4 hours during the evaluation.

Leak rate is calculated from last 2 hours of test period data.

Test data are acquired and recorded by computer.

There must be no dispensing or delivery during test.

Temperature: Average for product is determined by a minimum of 3 thermistors.

Groundwater: Depth to groundwater in backfill must be determined. If groundwater is above bottom 

of tank, product level must be adjusted to provide a minimum net pressure

of 1 psi at bottom of tank during test.

Calibration: Thermistors must be calibrated before each test.

Comments: Not evaluated using manifold tank systems.

Tests only portion of tank containing product.

As product level is lowered, leak rate in a leaking tank decreases (due to lower head 

pressure). Consistent testing at low levels could allow a leak to remain undetected.

EPA leak detection regulations require testing of the portion of the tank system which 

routinely contains product.

May also be used as an overfill test method.

Triangle Environmental, Inc. Evaluator: United States Testing Company, Inc.

2525 W. Burbank Blvd. Tel: (213) 723-7181

Burbank, CA 91505 Date of Evaluation: 04/02/91

Tel: (818) 840-7020
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

296

Revision Date: November 14, 1997

Universal Sensors and Devices, Inc.

TICS-1000

(Magnetostrictive Probe)

AUTOMATIC TANK GAUGING METHOD

Certification: Leak rate of 0.2 gph with PD = 96.6% and PFA = 3.4%.

Leak Threshold: 0.1 gph. A tank system should not be declared tight if the test result indicates a loss 

or gain that equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel, solvents.

Tank Capacity: Maximum of 15,000 gallons.

Tank must be minimum 90% full.

Waiting Time: Minimum of 8 hours between delivery and testing.

None between dispensing and testing.

There must be no delivery during waiting time.

Test Period: Minimum of 6 hours.

Test data are acquired and recorded by a microprocessor.

Leak rate is calculated from average of subsets of all collected data.

There must be no dispensing or delivery during test.

Temperature: Average for product is determined by a minimum of 5 resistance temperature 

detectors (RTDs).

Water Sensor: Must be used to detect water ingress.

Minimum detectable water level in the tank is 0.83 inch.

Minimum detectable water level change is 0.0116 inch.

Calibration: RTDs and probe must be checked and calibrated in accordance with manufacturer's 

instructions.

Comments: Not evaluated using manifold tank systems.

Tests only portion of tank containing product.

As product level is lowered, leak rate in a leaking tank decreases (due to lower head 

pressure). Consistent testing at low levels could allow a leak to remain undetected.

EPA leak detection regulations require testing of the portion of the tank system which 

routinely contains product.

Universal Sensors and Devices, Inc. Evaluator: Ken Wilcox Associates

9205 Alabama Ave., Unit C Tel: (816) 443-2494

Chatsworth, CA 91311 Date of Evaluation: 08/20/93

Tel: (800) 899-7121, (818) 998-7121
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

297

Revision Date: August 23, 1999

Universal Sensors and Devices, Inc.

LTC-1000

(Mass Buoyancy Probe)

BULK FIELD-CONSTRUCTED TANK TIGHTNESS TEST LEAK DETECTION METHOD

Certification: Leak rate is proportional to product surface area (PSA).

For tanks with PSA of 14,244 ft2, leak rate is 1.4 gph with PD = 97.2% and PFA = 

2.8%. For other tank sizes, leak rate equals [(PSA in ft2 ÷ 14,244 ft2) x 1.4 gph].

Example: For a tank with PSA = 20,000 ft2; leak rate = [(20,000 ft2 ÷ 14,244 ft2) x 1.4 

gph] = 2.0 gph.

Calculated minimum detectable leak rate is 1.18 gph with PD = 95% and PFA = 5%.

Leak rate may not be scaled below 0.2 gph.

Leak Threshold: Leak threshold is proportional to product surface area (PSA).

For tanks with PSA of 14,244 ft2, leak threshold is 0.7 gph. For other tank sizes, leak 

threshold equals [(PSA in ft2 ÷ 14,244 ft2) x 0.7 gph].

Example: For a tank with PSA = 20,000 ft2; leak threshold = [(20,000 ft2 ÷ 14,244 ft2) 

x 0.7 gph] = 1.0 gph.

A tank system should not be declared tight if the test result indicates a loss or gain 

that equals or exceeds the calculated leak threshold. 

Applicability: Gasoline, diesel, aviation fuel, fuel oil #4. Other liquids may be tested after 

consultation with the manufacturer.

Tank Capacity: Use limited to single field-constructed vertical tanks larger than 50,000 gallons. 

Maximum product surface area (PSA) is 35,610 ft2 (approximately 213 ft. diameter).

Performance not sensitive to product level.

Waiting Time: Minimum of 3 hours, 42 minutes after delivery. Valve leaks and pump drain-back may 

mask a leak. Allow sufficient waiting time to minimize these effects. 

None between dispensing and testing.

Test Period: Minimum of 49 hours.

There must be no dispensing or delivery during test.

Temperature: Measurement not required by this system.

Water Sensor: None. Water leaks are measured as increase in mass inside tank.

Calibration: Probe must be checked and calibrated in accordance with manufacturer's instructions.

Comments: Tests only portion of tank containing product.

As product level is lowered, leak rate in a leaking tank decreases (due to lower head 

pressure). Consistent testing at low levels could allow a leak to remain undetected.

Evaluated in a nominal 2,000,000 gallon, vertical underground tank with product 

surface area (PSA) of 14,244 ft2.

Universal Sensors and Devices, Inc. Evaluator: Ken Wilcox Associates

9205 Alabama Ave. Tel: (816) 443-2494
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

298

Chatsworth, CA 91311 Date of Evaluation: 05/17/96

Tel: (800) 899-7121, (818) 988-7121
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

299

Revision Date: August 23, 1999

Universal Sensors and Devices, Inc.

LTC-2000

(Differential Pressure Probe)

BULK FIELD-CONSTRUCTED TANK TIGHTNESS TEST LEAK DETECTION METHOD

Certification: Leak rate is proportional to product surface area (PSA).

For tanks with PSA of 14,244 ft2, leak rate is 3.0 gph with PD = 98.8% and PFA = 

1.2%. For other tank sizes, leak rate equals [(PSA in ft2 ÷ 14,244 ft2) x 3.0 gph].

Example: For a tank with PSA = 20,000 ft2; leak rate = [(20,000 ft2 ÷ 14,244 ft2) x 3.0 

gph] = 4.2 gph.

Calculated minimum detectable leak rate is 2.15 gph with PD = 95% and PFA = 5%.

Leak rate may not be scaled below 0.2 gph.

Leak Threshold: Leak threshold is proportional to product surface area (PSA).

For tanks with PSA of 14,244 ft2, leak threshold is 0.7 gph. For other tank sizes, leak 

threshold equals [(PSA in ft2 ÷ 14,244 ft2) x 1.5 gph].

Example: For a tank with PSA = 20,000 ft2, leak threshold = [(20,000 ft2 ÷ 14,244 ft2) 

x 1.5 gph] = 2.1 gph.

A tank system should not be declared tight if the test result indicates a loss or gain 

that equals or exceeds the calculated leak threshold. 

Applicability: Gasoline, diesel, aviation fuel, fuel oil #4. Other liquids may be tested after 

consultation with the manufacturer.

Tank Capacity: Use limited to single field-constructed vertical tanks larger than 50,000 gallons. 

Maximum product surface area (PSA) is 35,610 ft2 (approximately 213 ft. diameter).

Performance not sensitive to product level.

Waiting Time: Minimum of 3 hours, 30 minutes after delivery. Valve leaks and pump drain-back may 

mask a leak. Allow sufficient waiting time to minimize these effects. 

None between dispensing and testing.

Test Period: Minimum of 48 hours, 18 minutes.

There must be no dispensing or delivery during test.

Temperature: Measurement not required by this system.

Water Sensor: None. Water leaks are measured as increase in mass inside tank.

Calibration: Probe must be checked and calibrated in accordance with manufacturer's instructions.

Comments: Tests only portion of tank containing product.

As product level is lowered, leak rate in a leaking tank decreases (due to lower head 

pressure). Consistent testing at low levels could allow a leak to remain undetected.

Evaluated in a nominal 2,000,000 gallon, vertical underground tank with product 

surface area (PSA) of 14,244 ft2. 

Universal Sensors and Devices, Inc. Evaluator: Ken Wilcox Associates

9205 Alabama Ave. Tel: (816) 443-2494
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

300

Chatsworth, CA 91311 Date of Evaluation: 05/17/96

Tel: (800) 899-7121, (818) 988-7121
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

301

Revision Date: August 23, 1999

Universal Sensors and Devices, Inc.

Leak Alert System

Models LAL-100, LA-01, LA-02, LA-04, LA-X4, LA-08, DLS-01, LS-20, LS-36, LS-70, CATLAS 

Liquid Sensor LALS-1

LIQUID-PHASE INTERSTITIAL DETECTOR

Detector:

Output type: qualitative

Sampling frequency: continuous

Operating principle: thermal conductivity

Test Results:

unleaded gasoline

Response time (min) 1.24

Recovery time (min) <1

Product activation height (cm) 0.61

Lower detection limit (cm) 0.76

 

Specificity Results (in addition to above):

Activated: synthetic gasoline, diesel fuel, heating oil #2, water.

Comments:

Sensors are reusable.

Universal Sensors and Devices, Inc. Evaluator: Carnegie Mellon Research Institute

9205 Alabama Ave., Unit C Tel: (412) 268-3495

Chatsworth, CA 91311 Dates of Evaluation: 06/01/94, 04/22/97

Tel: (800) 899-7121, (818) 998-7121
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

302

Revision Date: August 23, 1999

Universal Sensors and Devices, Inc.

Leak Alert System

Models LAV-100, LA-01, LA-02, LA-04, LA-X4, LA-08, CATLAS

LAVS-1 MOS Vapor Sensor

VAPOR-PHASE OUT-OF-TANK PRODUCT DETECTOR

Detector:

Output type: qualitative

Sampling frequency: continuous

Operating principle: metal oxide semiconductor

Test Results:

unleaded gasoline synthetic gasoline JP-4jet fuel

Detection time (sec) 31 40 42

Fall time (min:sec) 4:43 4:25 4:30

Lower detection limit (ppm) 100 N/D* N/D

* See glossary.

Specificity Results (in addition to above):

Activated: n-hexane, toluene, xylene(s).

Universal Sensors and Devices, Inc. Evaluator: Carnegie Mellon Research Institute

9205 Alabama Ave., Unit C Tel: (412) 268-3495

Chatsworth, CA 91311 Date of Evaluation: 06/01/94

Tel: (800) 899-7121, (818) 988-7121
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

303

Revision Date: November 14, 1997

USTest, Inc.

UST 2001 Quick Test

(Ultrasonic Probe)

AUTOMATIC TANK GAUGING METHOD

Certification: Leak rate of 0.2 gph with PD = 97.5% and PFA = 2.5%.

Leak Threshold: 0.1 gph. A tank system should not be declared tight if the test result indicates a loss 

or gain that equals or exceeds this threshold.

Applicability: Gasoline, diesel, aviation fuel. 

Other liquids may be tested after consultation with the manufacturer.

Tank Capacity: Maximum of 15,000 gallons.

Tank must be between 50 and 95% full.

Waiting Time: Minimum of 4 hours between delivery and testing. 

Minimum of 15 minutes between dispensing and testing.

There must be no delivery during waiting time. 

Test Period: Minimum of 30 minutes.

With a test period of 1 hour, system has PD = 99.9% and PFA = 0.1%.

Test data are acquired and recorded by a computer. 

Leak rate is calculated from data determined to be valid by statistical analysis.

There must be no dispensing or delivery during test.

Temperature: Average for product is determined from the measurement of the change in the 

speed of sound.

Water Sensor: Must be used to detect water ingress.

water is declared via an ultrasonic signal ranging to the water interface.

Minimum detectable water level in the tank is less than 0.1 inch. 

Minimum detectable change in water level is 0.046 inch.

Calibration: Probe must be checked regularly in accordance with manufacturer’s instructions.

Comments: Not evaluated using manifold tank systems.

Tests only portion of tank containing product.

As product level is lowered, leak rate in a leaking tank decreases (due to lower head 

pressure). Consistent testing at low levels could allow a leak to remain undetected.

EPA leak detection regulations require testing of the portion of the tank system which 

routinely contains product.

USTest, Inc. Evaluator: Ken Wilcox Associates

406 E. Madison St., Suite 2004 Tel: (816) 443-2494

Broussard, LA 70518 Date of Evaluation: 06/06/95

Tel: (318) 839-1070
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

304

Revision Date: November 14, 1997

USTest, Inc.

UST 2001

(Ultrasonic Probe)

AUTOMATIC TANK GAUGING METHOD

Certification: Leak rate of 0.1 gph with PD = 95.2% and PFA = 4.8%.

Leak Threshold: 0.05 gph. A tank system should not be declared tight if the test result indicates a 

loss or gain that equals or exceeds this threshold.

Applicability: Gasoline, diesel, aviation fuel. 

Other liquids may be tested after consultation with the manufacturer.

Tank Capacity: Maximum of 15,000 gallons.

Tank must be between 50 and 95% full.

Waiting Time: Minimum of 4 hours between delivery and testing. 

Minimum of 15 minutes between dispensing and testing.

There must be no delivery during waiting time. 

Test Period: Minimum of 1 hour.

With a test period of 2 hours, system has PD = 98.6% and PFA = 1.4%. 

Test data are acquired and recorded by a computer. 

Leak rate is calculated from data determined to be valid by statistical analysis.

There must be no dispensing or delivery during test.

Temperature: Average for product is determined from the measurement of the change in the 

speed of sound.

Water Sensor: Must be used to detect water ingress.

water is declared via an ultrasonic signal ranging to the water interface.

Minimum detectable water level in the tank is less than 0.1 inch. 

Minimum detectable change in water level is 0.046 inch.

Calibration: Probe must be checked regularly in accordance with manufacturer’s instructions.

Comments: Not evaluated using manifold tank systems.

Tests only portion of tank containing product.

As product level is lowered, leak rate in a leaking tank decreases (due to lower head 

pressure). Consistent testing at low levels could allow a leak to remain undetected.

EPA leak detection regulations require testing of the portion of the tank system which 

routinely contains product.

USTest, Inc. Evaluator: Ken Wilcox Associates

406 E. Madison St., Suite 2004 Tel: (816) 443-2494

Broussard, LA 70518

Tel: (318) 839-1070 Date of Evaluation: 06/06/95
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

305

Revision Date: November 14, 1997

USTest, Inc.

UST 2000/U 

(Pressure and Vacuum Test)

NON-VOLUMETRIC TANK TIGHTNESS TEST METHOD (ULLAGE)

Certification: Leak rate of 0.1 gph with PD = 100% and PFA = 0%.

Leak Threshold: A tank system should not be declared tight when there is a substantial increase in 

the acoustic noise signal (when the tank is under pressure or vacuum) above the 

background signal (prior to pressurization or evacuation) in the frequency interval of 10 

kHz to 20 kHz.

Applicability: Gasoline, diesel, aviation fuel, fuel oils #2 through #6, waste oil, solvents.

Equipment is not in contact with the product.

Tank Capacity: Maximum ullage volume is 7,550 gallons for pressure test and 5,250 gallons for 

vacuum test.

Waiting Time: None if test is conducted after an underfilled tank tightness test.

Test Period: Minimum of 15 minutes (includes collection of background information).

Test Pressure: Net pressure of 2.0 psi or vacuum of 1.0 psi must be maintained in ullage.

Temperature: Acoustic Signal is independent of product temperature.

Groundwater: Depth to groundwater in backfill must be determined. If groundwater is above product 

level, vacuum test must not be used. Pressure test must be conducted using net 

pressure exceeding 2.0 psi in the ullage.

Calibration: Test equipment must be checked by tester before each test.

Comments: Not evaluated using manifold tank systems.

Evaluated using unleaded gasoline as test product.

Tests only ullage portion of tank. 

Product-filled portion of the tank must be tested using an underfill test method.

Microphone was less than 8 feet, 6 inches from the leak source during evaluation.

If the background noise is too high, test is inconclusive.

Vibration due to nearby equipment or dripping condensation may interfere with test.

Vacuum test method may not be effective in some backfill (such as clay) because it 

may plug holes in tank.

If soil is saturated with product, air or water ingress may not be declared by vacuum 

test. A well point in backfill may help identify presence of this condition.

USTest, Inc. Evaluator: Ken Wilcox Associates

406 E. Madison St., Suite 2004 Tel: (816) 443-2494

Broussard, LA 70518 Date of Evaluation: 03/24/92

Tel: (318) 839-1070
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

306

Revision Date: November 14, 1997

USTest, Inc.

UST 2000/LL

VOLUMETRIC TANK TIGHTNESS TEST METHOD (UNDERFILL)

Certification: Leak rate of 0.1 gph with PD = 98.12% and PFA = 1.88%.

Leak Threshold: 0.05 gph. A tank system should not be declared tight if the test result indicates a 

loss or gain that equals or exceeds this threshold.

Applicability: Gasoline, diesel, aviation fuel, water, kerosene. 

Other liquids may be tested after consultation with the manufacturer.

Tank Capacity: Maximum of 15,000 gallons. 

Tank must be minimum 15% full. There must be at least 20 inches and not more 

than 67 inches of product in the tank.

Waiting Time: Ranges from 3 to 12 hours between delivery and testing. 

Testing may begin when the rate of product temperature change does not exceed 0.1 

degree F per hour.

There must be no dispensing or delivery during waiting time.

Test Period: Minimum of 2 hours. 

Test data are acquired and recorded by a computer, which does a regression 

analysis to determine the leak rate. 

An ultrasonic device is used to measure changes in product level. 

There must be no dispensing or delivery during test.

Temperature: Average for product is determined from the measurement of the change in the speed 

of sound.

Groundwater: Depth to groundwater in backfill must be determined. If groundwater is above bottom 

of tank, product level must be adjusted to provide a minimum net pressure of 1 psi at 

bottom of tank during test. (There must be a difference of at least 37 inches between 

groundwater level and product level to provide a net pressure of 1 psi at bottom of tank 

during test.)

Calibration: Temperature sensors and probes must be checked annually and calibrated if 

necessary in accordance with manufacturer’s instructions.

Comments: Not evaluated using manifold tank systems.

Tests only portion of tank containing product.

As product level is lowered, leak rate in a leaking tank decreases (due to lower head 

pressure). Consistent testing at low levels could allow a leak to remain undetected.

EPA leak detection regulations require testing of the portion of the tank system which 

routinely contains product.

USTest, Inc. Evaluator: Ken Wilcox Associates

406 E. Madison St., Suite 2004 Tel: (816) 443-2494

Broussard, LA 70518 Date of Evaluation: 06/09/94

Tel: (318) 839-1070
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

307

Revision Date: November 14, 1997

USTest, Inc.

UST 2000/P

VOLUMETRIC TANK TIGHTNESS TEST METHOD (UNDERFILL)

Certification: Leak rate of 0.1 gph with PD = 99.9% and PFA = 0.1% for tanks up to 15,000 gallons,

Leak rate of 0.1 gph with PD = 99.7% and PFA = 0.3% for tanks from 15,000 gallons 

up to 45,000 gallons.

Leak Threshold: 0.05 gph. A tank system should not be declared tight if the test result indicates a 

loss or gain that equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel, waste oil, water, kerosene. 

Other liquids may be tested after consultation with the manufacturer.

Tank Capacity: Maximum of 45,000 gallons.

Tank must be minimum 78.6% full.

Waiting Time: Minimum for tanks up to 45,000 gallons must be determined from the manufacturer's 

chart of “Wait Time versus Tank Volume.” This chart must be included in the tank 

test report.

There must be no dispensing or delivery during waiting time.

Test Period: Minimum for tanks less than 10,000 gallons is one hour.

Minimum for tanks from 10,000 to 45,000 gallons is determined from the 

manufacturer's chart of Differential Volume versus Test Duration. 

Line labeled PD = 99.9% must be used. This chart must be included in the tank test 

report.

Test data are acquired and recorded by a computer, which does a regression 

analysis to determine the leak rate.

There must be no dispensing or delivery during test.

Temperature: Average for product is determined from the measurement of the change in the speed 

of sound.

Groundwater: Depth to groundwater in backfill must be determined. If groundwater is above bottom 

of tank, product level must be adjusted to provide a minimum net pressure of 1 psi at 

bottom of the tank during test.

Comments: Not evaluated using manifold tank systems.

Tests only portion of tank containing product.

As product level is lowered, leak rate in a leaking tank decreases (due to lower head 

pressure). Consistent testing at low levels could allow a leak to remain undetected.

EPA leak detection regulations require testing of the portion of the tank system which 

routinely contains product.

USTest, Inc. Evaluators: Midwest Research Institute

406 E. Madison St., Suite 2004 Tel: (816) 753-7600

Broussard, LA 70518 and Ken Wilcox Associates 

Tel: (318) 839-1070 Tel: (816) 443-2494

Dates of Evaluation: 12/05/90 (1000-10000 

gallons), 08/04/92 (10000-45000 gallons)
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

308

Revision Date: November 14, 1997

USTMAN Industries, Inc.

YES SIR 90

STATISTICAL INVENTORY RECONCILIATION TEST METHOD (QUALITATIVE)

Certification: Leak rate of 0.2 gph with PD = 96.3% and PFA = 3.9%.

Leak Threshold: 0.1 gph. A tank system should not be declared tight when a consistent loss or 

gain equals or exceeds this threshold that is statistically significant from zero at 

the 5% confidence level.

Applicability: Gasoline, diesel, aviation fuel, fuel oil #4.

Tank Capacity: Maximum of 15,000 gallons. 

Data Requirement: Minimum of 35 days of product level and flow through data. 

Comments: Not evaluated using manifold tank systems.

Of 120 data sets submitted for evaluation, 15 were inconclusive.

Median monthly throughput of tanks evaluated was 15,867 gallons.

Data sets evaluated were supplied by evaluator.

USTMAN Industries Inc. Evaluator: Midwest Research Institute

12265 W. Bayaud Ave., Suite 110 Tel: (816) 753-7600

Lakewood, CO 80228 Date of Evaluation: 12/17/90

Tel: (800) 253-8054
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

309

Revision Date: November 14, 1997

USTMAN Industries, Inc.

USTMAN SIR 1.91

STATISTICAL INVENTORY RECONCILIATION TEST METHOD (QUANTITATIVE)

Certification: Leak rate of 0.1 gph with PD =98.4% and PFA = 1.6%.

Leak Threshold: 0.1 gph. A tank system should not be declared tight when a consistent loss or 

gain equals or exceeds this threshold at the 5% level of significance.

Applicability: Gasoline, diesel, aviation fuel, fuel oil #4.

Tank Capacity: Maximum of 18,000 gallons. 

Data Requirement: Minimum of 42 days of product level and flow through data.

Comments: Not evaluated using data from manifold tank systems.

Of 41 data sets submitted for evaluation, 4 data sets were not analyzed and 

7 were inconclusive.

Median monthly throughput of tanks evaluated was 10,978 gallons.

Leak rates ranging from 0.048 to 0.201 gph were used in evaluation.

Data sets evaluated were supplied by evaluator.

USTMAN Industries Inc. Evaluator: Ken Wilcox Associates

12265 W. Bayaud Ave., Suite 110 Tel: (816) 443-2494

Lakewood, CO 80228 Date of Evaluation: 10/31/91

Tel: (800) 253-8054
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

310

Revision Date: November 14, 1997

USTMAN Industries, Inc.

USTMAN SIR Version 94.1

STATISTICAL INVENTORY RECONCILIATION TEST METHOD (QUANTITATIVE)

Certification: Leak rate of 0.1 gph with PD > 99% and PFA < 1.0%.

Leak Threshold: 0.05 gph. A tank system should not be declared tight if the test result indicates a 

loss or gain that equals or exceeds this threshold.

Applicability: Gasoline, diesel, aviation fuel, fuel oil #4.

Tank Capacity: Maximum of 30,000 gallons.

Data Requirement: Minimum of 30 days of product level and flow through data.

Comments: Evaluated using some data from manifold tank systems.

Of 53 data sets submitted for evaluation, all were analyzed with conclusive results.

Median monthly throughput of tanks evaluated was 25,408 gallons.

Leak rates of 0.05, 0.1, and 0.2 gph were used in evaluation.

Data sets evaluated were supplied by evaluator. Some data sets used USTMAN 

SIR 1.91 (0.1 gph) analysis as documentation that tanks were tight.

USTMAN Industries Inc. Evaluator: Ken Wilcox Associates

12265 W. Bayaud Ave., Suite 110 Tel: (816) 443-2494

Lakewood, CO 80228 Date of Evaluation: 03/31/94

Tel: (800) 253-8054
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

311

Revision Date: September 11, 1998

USTMAN Industries, Inc.

USTMAN SIR Versions 95.2, 95.2A

STATISTICAL INVENTORY RECONCILIATION TEST METHOD (QUANTITATIVE)

Certification: Leak rate of 0.2 gph with PD > 99.9% and PFA < 0.01%.

Leak rate of 0.1 gph with PD > 99.2% and PFA < 0.08%.

Leak Threshold: 0.1 for a leak rate of 0.2 gph.

0.05 for a leak rate of 0.1 gph.

A tank system should not be declared tight if the test result indicates a loss or gain 

that equals or exceeds this threshold.

Applicability: Gasoline, diesel, aviation fuel, fuel oil #4.

Tank Capacity: Maximum of 60,000 gallons for single tanks.

Maximum of 60,000 gallons cumulative capacity for manifold tank systems with no 

more than 4 tanks in system.

Data Requirement: Minimum of 30 days of product level and flow through data.

Comments: 44% of the data sets were from manifold tank systems.

Of 94 data sets submitted for evaluation, all were analyzed with conclusive results.

Results obtained from combined data for USTMAN Version 94.1 and 95.2.

Data used in the evaluation were obtained from manual tank sticking.

Median monthly throughput of tanks evaluated was 25,376 gallons.

Leak rates of 0.05, 0.1, and 0.2 gph were used in evaluation.

Data sets evaluated were supplied by evaluator.

USTMAN Industries Inc. Evaluator: Ken Wilcox Associates

12265 W. Bayaud Ave., Suite 110 Tel: (816) 443-2494

Lakewood, CO 80228 Date of Evaluation: 12/12/95

Tel: (800) 253-8054
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

312

Revision Date: August 23, 1999

Vaporless Manufacturing

Vaporless LD-2100 or PLC-5000 with 98LD-2000PLC 

(for Rigid and Flexible Pipelines)

AUTOMATIC ELECTRONIC LINE LEAK DETECTOR

Certification: Leak rate of 3.0 gph with PD = 100% and PFA = 0%. 

Leak Threshold: 2.5 gph. A pipeline system should not be declared tight if the test result indicates a 

loss that equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel, solvents.

Specification: System tests pressurized flexible, fiberglass and steel pipelines.

Tests are conducted at operating pressure.

Pipeline Capacity: Maximum of 172 gallons for rigid pipelines.

Maximum of 39.5 gallons for flexible pipelines.

Waiting Time: None between delivery and testing.

None between dispensing and testing.

Test Period: Response time is less than 8 minutes.

System Features: Permanent installation on pipeline.

Automatic testing of pipeline.

Preset threshold.

Single test to determine if pipeline is leaking.

LD-2100 is a stand alone system. PLC-5000 must be coupled with the 98LD-2000.

Pump shutdown, message display and alarm activation if leak is declared.

Calibration: System must be checked annually and calibrated if necessary in accordance with 

manufacturer's instructions.

Vaporless Manufacturing Evaluator: Ken Wilcox Associates

8700 East Long Mesa Drive Tel: (816) 443-2494

Prescott Valley, AZ 86314 Dates of Evaluation: 05/20/98, 11/10/98

Tel: (520) 775-0185
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

313

Revision Date: August 23, 1999

Vaporless Manufacturing

Vaporless LD-2100 or PLC-5000 with 98LD-2000PLC 

(for Rigid and Flexible Pipelines)

AUTOMATIC ELECTRONIC LINE LEAK DETECTOR

Certification: Leak rate of 0.2 gph with PD = 100% and PFA = 0%. 

Leak Threshold: 0.136 gph. A pipeline system should not be declared tight if the test result indicates 

a loss that equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel, solvents.

Specification: System tests pressurized flexible, fiberglass and steel pipelines.

Tests are conducted at operating pressure.

Pipeline Capacity: Maximum of 172 gallons for rigid pipelines.

Maximum of 39.5 gallons for flexible pipelines.

Waiting Time: None between delivery and testing.

None between dispensing and testing.

Test Period: Response time is 1 hour 48 minutes to 10 hours 54 minutes.

System Features: Permanent installation on pipeline.

Automatic testing of pipeline.

Preset threshold.

Single test to determine if pipeline is leaking.

LD-2100 is a stand alone system. PLC-5000 must be coupled with the 98LD-2000.

Pump shutdown, message display and alarm activation if leak is declared.

Calibration: System must be checked annually and calibrated if necessary in accordance with 

manufacturer's instructions.

Vaporless Manufacturing Evaluator: Ken Wilcox Associates

8700 East Long Mesa Drive Tel: (816) 443-2494

Prescott Valley, AZ 86314 Dates of Evaluation: 05/20/98, 11/10/98

Tel: (520) 775-0185
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

314

Revision Date: August 23, 1999

Vaporless Manufacturing

Vaporless LD-2100 or PLC-5000 with 98LD-2000PLC 

(for Rigid and Flexible Pipelines)

AUTOMATIC ELECTRONIC LINE LEAK DETECTOR

Certification: Leak rate of 0.1 gph with PD = 100% and PFA = 0%. 

Leak Threshold: 0.068 gph. A pipeline system should not be declared tight if the test result indicates 

a loss that equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel, solvents.

Specification: System tests pressurized flexible, fiberglass and steel pipelines.

Tests are conducted at operating pressure.

Pipeline Capacity: Maximum of 172 gallons for rigid pipelines.

Maximum of 39.5 gallons for flexible pipelines.

Waiting Time: None between delivery and testing.

None between dispensing and testing.

Test Period: Response time is 1 hour 48 minutes to 10 hours 54 minutes.

System Features: Permanent installation on pipeline.

Automatic testing of pipeline.

Preset threshold.

Single test to determine if pipeline is leaking.

LD-2100 is a stand alone system. PLC-5000 must be coupled with the 98LD-2000.

Pump shutdown, message display and alarm activation if leak is declared.

Calibration: System must be checked annually and calibrated if necessary in accordance with 

manufacturer's instructions.

Vaporless Manufacturing Evaluator: Ken Wilcox Associates

8700 East Long Mesa Drive Tel: (816) 443-2494

Prescott Valley, AZ 86314 Dates of Evaluation: 05/20/98, 11/10/98

Tel: (520) 775-0185
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

315

Revision Date: November 14, 1997

Vaporless Manufacturing

Vaporless LD-2000, LD-2000S

AUTOMATIC MECHANICAL LINE LEAK DETECTOR

Certification: Leak rate of 3.0 gph with PD = 100% and PFA = 0%. 

Leak Threshold: 1.7 gph. A pipeline system should not be declared tight if the test result indicates a 

loss that equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel, solvents.

Specification: System tests pressurized fiberglass or steel pipelines.

Tests are conducted at operating pressure.

Pipeline Capacity: Maximum of 129 gallons.

Waiting Time: None between dispensing and testing.

None between delivery and testing.

Test Period: Response time is 5 seconds.

System Features: Permanent installation on pipeline.

Automatic testing of pipeline.

Preset threshold.

Single test to determine if pipeline is leaking.

LD2000 - restricted flow to dispenser if leak is declared.

LD2000S - pump shutoff if leak is declared.

Calibration: System must be checked annually and calibrated if necessary in accordance with 

manufacturer's instructions.

Vaporless Manufacturing Evaluator: Ken Wilcox Associates

8700 East Long Mesa Drive Tel: (816) 443-2494

Prescott Valley, AZ 86314 Date of Evaluation: 11/19/90

Tel: (520) 775-0185
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

316

Revision Date: November 14, 1997

Vaporless Manufacturing

Vaporless LD-2000E, LD-2000E-S

(for Flexible Pipelines)

AUTOMATIC MECHANICAL LINE LEAK DETECTOR

Certification: Leak rate of 3.0 gph with PD = 100% and PFA = 0%. 

Leak Threshold: 2.0 gph. A pipeline system should not be declared tight if the test result indicates a 

loss that equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel, solvents.

Specification: System tests flexible pipelines.

Tests are conducted at operating pressure.

Pipeline Capacity: Maximum of 59.6 gallons.

Waiting Time: None between dispensing and testing.

None between delivery and testing.

Test Period: Response time is 30 seconds.

System Features: Permanent installation on pipeline.

Automatic testing of pipeline.

Preset threshold.

Single test to determine if pipeline is leaking.

LD2000E - restricted flow to dispenser if leak is declared.

LD2000ES - pump shutoff if leak is declared.

Calibration: System must be checked annually and calibrated if necessary in accordance with 

manufacturer's instructions.

Comments: Enviroflex piping with a bulk modulus* of 1,352 psi was used during evaluation.

*See glossary.

Vaporless Manufacturing Evaluator: Ken Wilcox Associates

8700 East Long Mesa Drive Tel: (816) 443-2494

Prescott Valley, AZ 86314 Date of Evaluation: 12/11/92

Tel: (520) 775-0185
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

317

Revision Date: November 14, 1997

Vaporless Manufacturing

Vaporless LD-2000T, LD-2000T-S

AUTOMATIC MECHANICAL LINE LEAK DETECTOR

Certification: Leak rate of 3.0 gph with PD = 100% and PFA = 0%. 

Leak Threshold: 2.5 gph. A pipeline system should not be declared tight if the test result indicates a 

loss that equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel, solvents.

Specification: System tests pressurized fiberglass and steel pipelines.

Tests are conducted at operating pressure.

Pipeline Capacity: Maximum of 129 gallons.

Waiting Time: None between dispensing and testing.

None between delivery and testing.

Test Period: Response time is 1 minute.

System Features: Permanent installation on pipeline.

Automatic testing of pipeline.

Preset threshold.

Single test to determine if pipeline is leaking.

LD2000T - restricted flow to dispenser if leak is declared.

LD2000T-S - pump shutoff if leak is declared.

Calibration: System must be checked annually and calibrated if necessary in accordance with 

manufacturer's instructions.

Vaporless Manufacturing Evaluator: Ken Wilcox Associates

8700 East Long Mesa Drive Tel: (816) 443-2494

Prescott Valley, AZ 86314 Date of Evaluation: 07/13/93

Tel: (520) 775-0185
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

318

Revision Date: August 23, 1999

Vaporless Manufacturing

Vaporless 98LD-2000, 99LD-2000, 99LD-2200, LD-2200 Scout

(for Rigid Flexible and Pipelines)

AUTOMATIC MECHANICAL LINE LEAK DETECTOR

Certification: Leak rate of 3.0 gph with PD = 100% and PFA = 0%. 

Leak Threshold: 2.5 gph. A pipeline system should not be declared tight if the test result indicates a 

loss that equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel, solvents.

Specification: System tests pressurized flexible, fiberglass, and steel pipelines.

Tests are conducted at operating pressure.

Pipeline Capacity: Maximum of 172 gallons for rigid pipelines.

Maximum of 39.5 gallons for flexible pipelines.

Waiting Time: None between dispensing and testing.

None between delivery and testing.

Test Period: Response time is less than 1 minute without a leak and 1 to 8 minutes with a leak.

System Features: Permanent installation on pipeline.

Automatic testing of pipeline.

Preset threshold.

Single test to determine if pipeline is leaking.

Restricted flow to dispenser if leak is declared.

Calibration: System must be checked annually and calibrated if necessary in accordance with 

manufacturer's instructions.

Vaporless Manufacturing Evaluator: Ken Wilcox Associates

8700 East Long Mesa Drive Tel: (816) 443-2494

Prescott Valley, AZ 86314 Dates of Evaluation: 05/20/98, 11/10/98

Tel: (520) 775-0185
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

319

Revision Date: November 14, 1997

Vaporless Manufacturing

Vaporless LD-3000, LD-3000S

AUTOMATIC MECHANICAL LINE LEAK DETECTOR

Certification: Leak rate of 3.0 gph with PD = 100% and PFA = 0%. 

Leak Threshold: 2.0 gph. A pipeline system should not be declared tight if the test result indicates a 

loss that equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel, solvents.

Specification: System tests pressurized steel and fiberglass pipelines.

Tests are conducted at operating pressure.

Pipeline Capacity: Maximum of 320 gallons.

Waiting Time: None between dispensing and testing.

Test Period: Response time is 9 seconds.

System Features: Permanent installation on pipeline.

Automatic testing of pipeline.

LD3000 - restricted flow to dispenser if leak is declared.

LD3000S - pump shutoff if leak is declared.

Calibration: System must be checked annually and calibrated if necessary in accordance with 

manufacturer's instructions.

Vaporless Manufacturing Evaluator: Ken Wilcox Associates

8700 East Long Mesa Drive Tel: (816) 443-2494

Prescott Valley, AZ 86314 Date of Evaluation: 08/20/93

Tel: (520) 775-0185
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

320

Revision Date: September 11, 1998

Veeder-Root

TLS-350, 350PC, 350R, 350RPC Line Leak Detector, Series 8475

AUTOMATIC ELECTRONIC LINE LEAK DETECTOR

Certification: Leak rate of 3.0 gph with PD = 100% and PFA = 0%. 

Leak Threshold: 1.5 gph. A pipeline system should not be declared tight if the test result indicates a 

loss that equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel, solvents.

Specification: System tests pressurized fiberglass and steel pipelines.

Tests are conducted at operating pressure.

System will not function with a mechanical line leak detector installed in the 

pipeline.

Pipeline Capacity: Maximum of 158 gallons.

Waiting Time: None between delivery and testing.

Minimum between dispensing and testing depends on volume of product and 

temperature gradient which is determined by the system's computer.

Test Period: Response time is 14 seconds.

Test data are acquired and recorded by a microprocessor.

Calculations are automatically performed by the microprocessor.

System Features: Permanent installation on pipeline.

Automatic testing of pipeline.

Preset threshold.

Single test to determine if pipeline is leaking.

Pump shutdown, message display and alarm activation if leak is declared.

Calibration: System must be checked annually and calibrated if necessary in accordance with 

manufacturer's instructions.

Veeder-Root Evaluator: Midwest Research Institute

125 Powder Forest Dr. Tel: (816) 753-7600

Simsbury, CT 06070-2003 Date of Evaluation: 09/20/91

Tel: (860) 651-2700 Evaluator: Ken Wilcox Associates

Tel: (816) 443-2494

Date of Revised Evaluation: 04/12/93
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

321

Revision Date: September 11, 1998

Veeder-Root

TLS-350, 350PC, 350R, 350RPC Line Leak Detector, Series 8475

AUTOMATIC ELECTRONIC LINE LEAK DETECTOR

Certification: Leak rate of 0.2 gph with PD = 100.0% and PFA = 0%. 

Leak Threshold: 0.1 gph. A pipeline system should not be declared tight if the test result indicates a 

loss that equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel, solvents.

Specification: System tests pressurized fiberglass and steel pipelines.

Tests are conducted at operating pressure.

System will not function with a mechanical line leak detector installed in the 

pipeline.

Pipeline Capacity: Maximum of 158 gallons.

Waiting Time: None between delivery and testing.

Minimum between dispensing and testing depends on volume of product and 

temperature gradient which is determined by the system's computer.

Test Period: Response time is 6 minutes.

Test data are acquired and recorded by a microprocessor.

Calculations are automatically performed by the microprocessor.

System Features: Permanent installation on pipeline.

Automatic testing of pipeline.

Preset threshold.

Single test to determine if pipeline is leaking.

Pump shutdown, message display and alarm activation if leak is declared.

Calibration: System must be checked annually and calibrated if necessary in accordance with 

manufacturer's instructions.

Veeder-Root Evaluator: Midwest Research Institute

125 Powder Forest Dr. Tel: (816) 753-7600

Simsbury, CT 06070-2003 Date of Evaluation: 09/20/91

Tel: (860) 651-2700 Evaluator: Ken Wilcox Associates, Inc.

Tel: (816) 443-2494

Date of Revised Evaluation: 04/12/93
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

322

Revision Date: November 14, 1997

Veeder-Root

TLS-350, 350PC, 350R, 350RPC Line Leak Detector, Series 8475

AUTOMATIC ELECTRONIC LINE LEAK DETECTOR

Certification: Leak rate of 0.1 gph with PD = 100% and PFA = 0%. 

Leak Threshold: 0.079 gph. A pipeline system should not be declared tight if the test result indicates 

a loss that equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel, solvents.

Specification: System tests pressurized fiberglass and steel pipelines.

Tests are conducted at operating pressure.

System will not function with a mechanical line leak detector installed in the 

pipeline.

Pipeline Capacity: Maximum of 158 gallons.

Waiting Time: None between delivery and testing.

Minimum between dispensing and testing depends on volume of product and 

temperature gradient which is determined by the system's computer.

Test Period: Response time is 14 minutes.

Test data are acquired and recorded by a microprocessor.

Calculations are automatically performed by the microprocessor.

System Features: Permanent installation on pipeline.

Automatic testing of pipeline.

Preset threshold.

Single test to determine if pipeline is leaking.

Pump shutdown, message display and alarm activation if leak is declared.

Calibration: System must be checked annually and calibrated if necessary in accordance with 

manufacturer's instructions.

Veeder-Root Evaluator: Midwest Research Institute

125 Powder Forest Dr. Tel: (816) 753-7600

Simsbury, CT 06070-2003 Date of Evaluation: 09/20/91

Tel: (860) 651-2700 Evaluator: Ken Wilcox Associates, Inc.

Tel: (816) 443-2494

Date of Revised Evaluation: 04/12/93
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

323

Revision Date: November 14, 1997

Veeder-Root

TLS-350, 350PC, 350R, 350RPC Line Leak Detector, Series 8475

(for Flexible Pipelines)

AUTOMATIC ELECTRONIC LINE LEAK DETECTOR

Certification: Leak rate of 3.0 gph with PD = 100% and PFA = 0%. 

Leak Threshold: 1.5 gph. A pipeline system should not be declared tight if the test result indicates a 

loss that equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel, solvents.

Specification: System tests pressurized flexible pipelines.

Tests are conducted at operating pressure.

System will not function with a mechanical line leak detector installed in the 

pipeline.

Pipeline Capacity: Maximum of 49.6 gallons.

Waiting Time: None between delivery and testing.

Minimum between dispensing and testing depends on volume of product and 

temperature gradient which is determined by the system's computer.

Test Period: Response time is 1 minute.

Test data are acquired and recorded by a microprocessor.

Calculations are automatically performed by the microprocessor.

System Features: Permanent installation on pipeline.

Automatic testing of pipeline.

Preset threshold.

Single test to determine if pipeline is leaking.

Pump shutdown, message display and alarm activation if leak is declared.

Calibration: System must be checked annually and calibrated if necessary in accordance with 

manufacturer's instructions.

Veeder-Root Evaluator: Ken Wilcox Associates

125 Powder Forest Dr. Tel: (816) 443-2494

Simsbury, CT 06070-2003 Date of Evaluation: 08/04/93

Tel: (860) 651-2700
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

324

Revision Date: May 29, 1998

Veeder-Root

TLS-350, 350PC, 350R, 350RPC Line Leak Detector, Series 8475

(for Flexible Pipelines)

AUTOMATIC ELECTRONIC LINE LEAK DETECTOR

Certification: Leak rate of 0.2 gph with PD = 96% and PFA = 4%. 

Leak Threshold: 0.1 gph. A pipeline system should not be declared tight if the test result indicates a 

loss that equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel, solvents.

Specification: System tests pressurized flexible pipelines.

Tests are conducted at operating pressure.

System will not function with a mechanical line leak detector installed in the 

pipeline.

Pipeline Capacity: Maximum of 49.6 gallons.

Waiting Time: None between delivery and testing.

Minimum between dispensing and testing depends on volume of product and 

temperature gradient which is determined by the system's computer.

Test Period: Response time is 45 minutes to 8 hours, 51 minutes.

Test data are acquired and recorded by a microprocessor.

Calculations are automatically performed by the microprocessor.

System Features: Permanent installation on pipeline.

Automatic testing of pipeline.

Preset threshold.

Single test to determine if pipeline is leaking.

Pump shutdown, message display and alarm activation if leak is declared.

Calibration: System must be checked annually and calibrated if necessary in accordance with 

manufacturer's instructions.

Veeder-Root Evaluator: Ken Wilcox Associates

125 Powder Forest Dr. Tel: (816) 443-2494

Simsbury, CT 06070-2003 Date of Evaluation: 08/04/93
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

325

Tel: (860) 651-2700
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

326

Revision Date: May 29, 1998

Veeder-Root

TLS-350, 350PC, 350R, 350RPC Line Leak Detector, Series 8475

(for Flexible Pipelines)

AUTOMATIC ELECTRONIC LINE LEAK DETECTOR

Certification: Leak rate of 0.1 gph with PD = 100% and PFA = 0%. 

Leak Threshold: 0.079 gph. A pipeline system should not be declared tight if the test result indicates 

a loss that equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel, solvents.

Specification: System tests pressurized flexible pipelines.

Tests are conducted at operating pressure.

System will not function with a mechanical line leak detector installed in the 

pipeline.

Pipeline Capacity: Maximum of 49.6 gallons.

Waiting Time: None between delivery and testing.

Minimum between dispensing and testing depends on volume of product and 

temperature gradient which is determined by the system's computer.

Test Period: Response time is 1 hour, 12 minutes to 12 hours, 54 minutes.

Test data are acquired and recorded by a microprocessor.

Calculations are automatically performed by the microprocessor.

System Features: Permanent installation on pipeline.

Automatic testing of pipeline.

Preset threshold.

Single test to determine if pipeline is leaking.

Pump shutdown, message display and alarm activation if leak is declared.

Calibration: System must be checked annually and calibrated if necessary in accordance with 

manufacturer's instructions.

Veeder-Root Evaluator: Ken Wilcox Associates

125 Powder Forest Dr. Tel: (816) 443-2494

Simsbury, CT 06070-2003 Date of Evaluation: 08/04/93

Tel: (860) 651-2700
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

327

Revision Date: May 29, 1998

Veeder-Root

TLS 350, 350PC, 350R, 350RPC Line Leak Detector, Series 8484

AUTOMATIC ELECTRONIC LINE LEAK DETECTOR

Certification: Leak rate of 3.0 gph with PD = 100.0% and PFA = 0%. 

Leak Threshold: 1.88 gph. A pipeline system should not be declared tight if the test result indicates 

a loss that equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel, solvents.

Specification: System tests pressurized fiberglass and steel pipelines.

Tests are conducted at operating pressure.

System will not function with a mechanical line leak detector installed in the 

pipeline.

Pipeline Capacity: Maximum of 98.4 gallons.

Waiting Time: None between delivery and testing.

Minimum of 16 minutes between dispensing and testing.

Test Period: Response time is 28.8 seconds.

Test data are acquired and recorded by a microprocessor.

Calculations are automatically performed by the microprocessor.

System Features: Permanent installation on pipeline.

Automatic testing of pipeline.

Preset threshold.

Single test to determine if pipeline is leaking.

Pump shutdown (optional), message display and alarm activation if leak is declared.

Calibration: System must be checked annually and calibrated if necessary in accordance with 

manufacturer's instructions.

Veeder-Root Evaluator: Midwest Research Institute

125 Powder Forest Dr. Tel: (816) 753-7600

Simsbury, CT 06070-2003 Date of Evaluation: 08/07/91

Tel: (860) 651-2700
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

328

Revision Date: June 2, 1997

Veeder-Root

TLS 350, 350PC, 350R, 350RPC Line Leak Detector, Series 8484

AUTOMATIC ELECTRONIC LINE LEAK DETECTOR

Certification: Leak rate of 0.2 gph with PD = 100.0% and PFA = 0%. 

Leak Threshold: 0.17 gph. A pipeline system should not be declared tight if the test result indicates 

a loss that equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel, solvents.

Specification: System tests pressurized fiberglass and steel pipelines.

Tests are conducted at operating pressure.

System will not function with a mechanical line leak detector installed in the 

pipeline.

Pipeline Capacity: Maximum of 98.4 gallons.

Waiting Time: None between delivery and testing.

Minimum of 45 minutes to 1 hour between dispensing and testing.

Test Period: Response time is 32 to 48 minutes.

Test data are acquired and recorded by a microprocessor.

Calculations are automatically performed by the microprocessor.

System Features: Permanent installation on pipeline.

Automatic testing of pipeline.

Preset threshold.

Single test to determine if pipeline is leaking.

Pump shutdown (optional), message display and alarm activation if leak is declared.

Calibration: System must be checked annually and calibrated if necessary in accordance with 

manufacturer's instructions.

Veeder-Root Evaluator: Midwest Research Institute

125 Powder Forest Dr. Tel: (816) 753-7600

Simsbury, CT 06070-2003 Date of Evaluation: 12/18/96

Tel: (860) 651-2700
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

329

Revision Date: November 14, 1997

Veeder-Root

TLS 350, 350PC, 350R, 350RPC Line Leak Detector, Series 8484

AUTOMATIC ELECTRONIC LINE LEAK DETECTOR

Certification: Leak rate of 0.1 gph with PD = 100.0% and PFA = 0%. 

Leak Threshold: 0.05 gph. A pipeline system should not be declared tight if the test result indicates 

a loss that equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel, solvents.

Specification: System tests pressurized fiberglass and steel pipelines.

Tests are conducted at operating pressure.

System will not function with a mechanical line leak detector installed in the 

pipeline.

Pipeline Capacity: Maximum of 98.4 gallons.

Waiting Time: None between delivery and testing.

Minimum of 2 hours, 30 minutes between dispensing and testing.

Test Period: Response time is 18 minutes.

Test data are acquired and recorded by a microprocessor.

Calculations are automatically performed by the microprocessor.

System Features: Permanent installation on pipeline.

Automatic testing of pipeline.

Preset threshold.

Single test to determine if pipeline is leaking.

Pump shutdown (optional), message display and alarm activation if leak is declared.

Calibration: System must be checked annually and calibrated if necessary in accordance with 

manufacturer's instructions.

Veeder-Root Evaluator: Midwest Research Institute

125 Powder Forest Dr. Tel: (816) 753-7600

Simsbury, CT 06070-2003 Date of Evaluation: 08/07/91

Tel: (860) 651-2700
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

330

Revision Date: August 23, 1999

Veeder-Root

TLS 350, 350PC, 350R, 350RPC, LLD-300 Line Leak Detector, Series 8484

(for Flexible Pipelines)

AUTOMATIC ELECTRONIC LINE LEAK DETECTOR

Certification: Leak rate of 3.0 gph with PD = 100.0% and PFA = 0%. 

Leak Threshold: 1.5 gph. A pipeline system should not be declared tight if the test result indicates a 

loss that equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel, solvents.

Specification: System tests pressurized flexible pipelines.

Tests are conducted at 10 psi.

System will not function with a mechanical line leak detector installed in the 

pipeline.

Pipeline Capacity: Maximum of 40.8 gallons.

Waiting Time: None between delivery and testing.

Minimum of 13 minutes between dispensing and testing.

Test Period: Response time is 1 to 6 minutes.

Test data are acquired and recorded by a microprocessor.

Calculations are automatically performed by the microprocessor.

System Features: Permanent installation on pipeline.

Automatic testing of pipeline.

Preset threshold.

Single test to determine if pipeline is leaking.

Pump shutdown (optional), message display and alarm activation if leak is declared.

Calibration: System must be checked annually and calibrated if necessary in accordance with 

manufacturer's instructions.

Veeder-Root Evaluator: Midwest Research Institute

125 Powder Forest Dr. Tel: (816) 753-7600

Simsbury, CT 06070-2003 Date of Evaluation: 10/16/95

Tel: (860) 651-2700
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

331

Revision Date: November 14, 1997

Veeder-Root

TLS 350, 350PC, 350R, 350RPC Line Leak Detector, Series 8484

(for Flexible Pipelines)

AUTOMATIC ELECTRONIC LINE LEAK DETECTOR

Certification: Leak rate of 0.2 gph with PD = 100.0% and PFA = 0%. 

Leak Threshold: 0.17 gph. A pipeline system should not be declared tight if the test result indicates 

a loss that equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel, solvents.

Specification: System tests pressurized flexible pipelines.

Tests are conducted at 30 psi.

System will not function with a mechanical line leak detector installed in the 

pipeline.

Pipeline Capacity: Maximum of 40.8 gallons.

Waiting Time: None between delivery and testing.

Minimum of 4 minutes to 1 hour, 9 minutes between dispensing and testing.

Test Period: Response time is 40 minutes to 1 hour.

Test data are acquired and recorded by a microprocessor.

Calculations are automatically performed by the microprocessor.

System Features: Permanent installation on pipeline.

Automatic testing of pipeline.

Preset threshold.

Single test to determine if pipeline is leaking.

Pump shutdown (optional), message display and alarm activation if leak is declared.

Calibration: System must be checked annually and calibrated if necessary in accordance with 

manufacturer's instructions.

Veeder-Root Evaluator : Midwest Research Institute

125 Powder Forest Dr. Tel: (816) 753-7600

Simsbury, CT 06070-2003 Date of Evaluation: 01/31/97

Tel: (860) 651-2700
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

332

Revision Date: May 29, 1998

Veeder-Root

TLS 350, 350PC, 350R, 350RPC Line Leak Detector, Series 8484

(for Flexible Pipelines)

AUTOMATIC ELECTRONIC LINE LEAK DETECTOR

Certification: Leak rate of 0.1 gph with PD = 100.0% and PFA = 0%. 

Leak Threshold: 0.05 gph. A pipeline system should not be declared tight if the test result indicates 

a loss that equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel, solvents.

Specification: System tests pressurized flexible pipelines.

Tests are conducted at operating pressure with leak rates equivalent to 45 psi line 

pressure.

System will not function with a mechanical line leak detector installed in the 

pipeline.

Pipeline Capacity: Maximum of 40.8 gallons.

Waiting Time: None between delivery and testing.

Minimum of 1 to 4 hours between dispensing and testing.

Test Period: Response time is 45 minutes to 1 hour, 15 minutes.

Test data are acquired and recorded by a microprocessor.

Calculations are automatically performed by the microprocessor.

System Features: Permanent installation on pipeline.

Automatic testing of pipeline.

Preset threshold.

Single test to determine if pipeline is leaking.

Pump shutdown (optional), message display and alarm activation if leak is declared.

Calibration: System must be checked annually and calibrated if necessary in accordance with 

manufacturer's instructions.

Veeder-Root Evaluator: Midwest Research Institute

125 Powder Forest Dr. Tel: (816) 753-7600

Simsbury, CT 06070-2003 Date of Evaluation: 10/16/95

Tel: (860) 651-2700
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

333

Revision Date: August 23, 1999

Veeder-Root

TLS 350, 350PC, 350R, 350 RPC, LLD-300 Line Leak Detector, Series 8494

Pressurized Line Leak Detector, Series 8494

AUTOMATIC ELECTRONIC LINE LEAK DETECTOR

Certification: Leak rate of 3.0 gph with PD = 100% and PFA = 0%. 

Leak Threshold: 2.5 gph. A pipeline system should not be declared tight if the test result indicates a 

loss that equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel, solvents.

Specification: System tests pressurized fiberglass and steel pipelines.

Tests are conducted at operating pressure, not to exceed 50 psi.

System will not function with a mechanical line leak detector installed in the 

pipeline.

Pipeline Capacity: Maximum of 100 gallons.

Waiting Time: None between delivery and testing.

None between dispensing and testing.

Test Period: Response time is less than 1 minute.

Test data are acquired and recorded by a microprocessor.

Calculations are automatically performed by the microprocessor.

System Features: Permanent installation on pipeline.

Automatic testing of pipeline.

Preset threshold.

Single test to determine if pipeline is leaking.

Pump shutdown (optional), message display and alarm activation if leak is declared.

Calibration: System must be checked annually and calibrated if necessary in accordance with 

manufacturer's instructions.

Veeder-Root Evaluator: Midwest Research Institute

125 Powder Forest Dr. Tel: (816) 753-7600

Simsbury, CT 06070-2003 Date of Evaluation: 05/08/96

Tel: (860) 651-2700
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

334

Revision Date: August 23, 1999

Veeder-Root

TLS 350, 350PC, 350R, 350 RPC, LLD-300 Line Leak Detector, Series 8494

Pressurized Line Leak Detector, Series 8494

AUTOMATIC ELECTRONIC LINE LEAK DETECTOR

Certification: Leak rate of 0.2 gph with PD = 100% and PFA = 0%. 

Leak Threshold: 0.17 gph. A pipeline system should not be declared tight if the test result indicates 

a loss that equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel, solvents.

Specification: System tests pressurized fiberglass and steel pipelines.

Tests are conducted at operating pressure, not to exceed 50 psi.

System will not function with a mechanical line leak detector installed in the 

pipeline.

Pipeline Capacity: Maximum of 100 gallons.

Waiting Time: None between delivery and testing.

Minimum between dispensing and testing is 45 minutes.

Test Period: Response time is 45 minutes.

Test data are acquired and recorded by a microprocessor.

Calculations are automatically performed by the microprocessor.

System Features: Permanent installation on pipeline.

Automatic testing of pipeline.

Preset threshold.

Single test to determine if pipeline is leaking.

Pump shutdown (optional), message display and alarm activation if leak is declared.

Calibration: System must be checked annually and calibrated if necessary in accordance with 

manufacturer's instructions.

Veeder-Root Evaluator: Midwest Research Institute

125 Powder Forest Dr. Tel: (816) 753-7600

Simsbury, CT 06070-2003 Date of Evaluation: 05/08/96

Tel: (860) 651-2700
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

335

Revision Date: August 23, 1999

Veeder-Root

TLS 350, 350PC, 350R, 350 RPC, LLD-300 Line Leak Detector, Series 8494

Pressurized Line Leak Detector, Series 8494

AUTOMATIC ELECTRONIC LINE LEAK DETECTOR

Certification: Leak rate of 0.1 gph with PD = 100% and PFA = 0%. 

Leak Threshold: 0.09 gph. A pipeline system should not be declared tight if the test result indicates 

a loss that equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel, solvents.

Specification: System tests pressurized fiberglass and steel pipelines.

Tests are conducted at operating pressure, not to exceed 50 psi.

System will not function with a mechanical line leak detector installed in the 

pipeline.

Pipeline Capacity: Maximum of 100 gallons.

Waiting Time: None between delivery and testing.

Minimum of 2 hours between dispensing and testing.

Test Period: Response time is 32 to 48 minutes.

Test data are acquired and recorded by a microprocessor.

Calculations are automatically performed by the microprocessor.

System Features: Permanent installation on pipeline.

Preset threshold.

Single test to determine if pipeline is leaking.

Pump shutdown (optional), message display and alarm activation if leak is declared.

Calibration: System must be checked annually and calibrated if necessary in accordance with 

manufacturer's instructions.

Comments: Testing of pipeline at this leak rate is normally initiated manually, but may be set to 

activate automatically.

Veeder-Root Evaluator: Midwest Research Institute

125 Powder Forest Dr. Tel: (816) 753-7600

Simsbury, CT 06070-2003 Date of Evaluation: 05/08/96

Tel: (860) 651-2700
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

336

Revision Date: September 11, 1998

Veeder-Root

TLS-200, 200i, 250i, 300, 300C, 300i, 350, 350PC, 350R, 350RPC UST ATGS 

(Model 7842 Digital Sensing Capacitance Probe)

AUTOMATIC TANK GAUGING METHOD

Certification: Leak rate of 0.2 gph with PD = 99% and PFA = 1%. 

Leak Threshold: 0.1 gph. A tank system should not be declared tight if the test result indicates a loss 

or gain that equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel, solvents.

Tank Capacity: Maximum of 15,000 gallons.

Tank must be between 50 and 95% full.

Waiting Time: Minimum of 8 hours, 18 minutes between delivery and testing.

There must be no dispensing or delivery during waiting time.

Test Period: Minimum of 5 hours.

Test data are acquired and recorded by the system’s computer.

Leak rate is calculated from the difference between the first and last data collected.

There must be no dispensing or delivery during test.

Temperature: Average for product is determined by a temperature averaging probe.

Water Sensor: Must be used to detect water ingress.

Minimum detectable water level in the tank is 1.40 inches.

Minimum detectable change in water level is 0.040 inch.

Calibration: Temperature averaging probe must be checked and calibrated in accordance with 

manufacturer's instructions.

Comments: Not evaluated using manifold tank systems.

Tests only portion of tank containing product.

As product level is lowered, leak rate in a leaking tank decreases (due to lower head 

pressure). Consistent testing at low levels could allow a leak to remain undetected.

EPA leak detection regulations require testing of the portion of the tank system which 

routinely contains product.

Capacitance probes do not work with oxygenated fuels.

Veeder-Root Evaluator: Midwest Research Institute

125 Powder Forest Dr. Tel: (816) 753-7600

Simsbury, CT 06070-2003 Date of Evaluation: 05/14/93

Tel: (860) 651-2700
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

337

Revision Date: September 11, 1998

Veeder-Root

TLS-200, 200i, 250i, 300, 300C, 300i, 300PC, 350, 350PC, 350R, 350RPC UST ATGS 

(Model 8472 Digital Sensing Capacitance Probe)

AUTOMATIC TANK GAUGING METHOD

Certification: Leak rate of 0.2 gph with PD = 99% and PFA = 0.2%. 

Leak Threshold: 0.126 gph. A tank system should not be declared tight if the test result indicates a 

loss or gain that equals or exceeds this threshold.

Applicability: Gasoline, diesel, aviation fuel, solvents.

Tank Capacity: Maximum of 15,000 gallons.

Tank must be between 50 and 95% full.

Waiting Time: Minimum of 8 hours, 18 minutes between delivery and testing.

There must be no dispensing or delivery during waiting time.

Test Period: Minimum of 2 hours.

Test data are acquired and recorded by the system’s computer.

Leak rate is calculated from the difference between the first and last data collected.

There must be no dispensing during test.

Temperature: Average for product is determined by a minimum of 5 thermistors.

Water Sensor: Must be used to detect water ingress.

Minimum detectable water level in the tank is 1.52 inches.

Minimum detectable change in water level is 0.027 inch.

Calibration: Thermistors and probe must be checked and calibrated in accordance with 

manufacturer's instructions.

Comments: Not evaluated using manifold tank systems.

Tests only portion of tank containing product.

As product level is lowered, leak rate in a leaking tank decreases (due to lower head 

pressure). Consistent testing at low levels could allow a leak to remain undetected.

EPA leak detection regulations require testing of the portion of the tank system which 

routinely contains product.

Capacitance probes do not work with oxygenated fuels.

Veeder-Root Evaluator: Midwest Research Institute

125 Powder Forest Dr. Tel: (816) 753-7600

Simsbury, CT 06070-2003 Date of Evaluation: 05/14/93

Tel: (860) 651-2700
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

338

Revision Date: November 14, 1997

Veeder-Root

TLS-200, 200i, 250i, 300, 300C, 300i, 300PC, 350, 350PC, 350R, 350RPC UST ATGS 

(Model 8472 Digital Sensing Capacitance Probe)

AUTOMATIC TANK GAUGING METHOD

Certification: Leak rate of 0.1 gph with PD = 99% and PFA = 0.1%. 

Leak Threshold: 0.071 gph. A tank system should not be declared tight if the test result indicates a 

loss or gain that equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel, solvents.

Tank Capacity: Maximum of 15,000 gallons.

Tank must be minimum 95% full.

Waiting Time: Minimum of 8 hours, 15 minutes between delivery and testing.

Minimum of 30 minutes between dispensing and testing.

There must be no delivery during waiting time.

Test Period: Minimum of 2 hours.

Test data are acquired and recorded by the system’s computer.

Leak rate is calculated from the difference between the first and last data collected.

There must be no dispensing during test.

Temperature: Average for product is determined by a minimum of 5 thermistors.

Water Sensor: Must be used to detect water ingress.

Minimum detectable water level in the tank is 1.52 inches.

Minimum detectable change in water level is 0.027 inch.

Calibration: Thermistors and probe must be checked and calibrated in accordance with 

manufacturer's instructions.

Comments: Not evaluated using manifold tank systems.

Tests only portion of tank containing product.

As product level is lowered, leak rate in a leaking tank decreases (due to lower head 

pressure). Consistent testing at low levels could allow a leak to remain undetected.

EPA leak detection regulations require testing of the portion of the tank system which 

routinely contains product.

Capacitance probes do not work with oxygenated fuels.

Veeder-Root Evaluator: Midwest Research Institute

125 Powder Forest Dr. Tel: (816) 753-7600

Simsbury, CT 06070-2003 Date of Evaluation: 05/14/93

Tel: (860) 651-2700
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

339

Revision Date: September 11, 1998

Veeder-Root

TLS-200, 200i, 250, 250i, 300, 300C, 300i, 300PC, 350, 350PC, 350R, 350RPC UST ATGS 

(Model 8473 Digital Sensing Magnetostrictive Probe)

AUTOMATIC TANK GAUGING METHOD

Certification: Leak rate of 0.2 gph with PD = 99% and PFA = 0.1%. 

Leak Threshold: 0.093 gph. A tank system should not be declared tight if the test result indicates a 

loss or gain that equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel, solvents.

Tank Capacity: Maximum of 15,000 gallons.

Tank must be between 50 and 95% full.

Waiting Time: Minimum of 8 hours, 18 minutes between delivery and testing.

Minimum of 30 minutes between dispensing and testing.

There must be no delivery during waiting time.

Test Period: Minimum of 2 hours.

Test data are acquired and recorded by the system’s computer.

Leak rate is calculated from the difference between the first and last data collected.

There must be no dispensing during test.

Temperature: Average for product is determined by a minimum of 5 thermistors.

Water Sensor: Must be used to detect water ingress.

Minimum detectable water level in the tank is 0.544 inch.

Minimum detectable change in water level is 0.027 inch.

Calibration: Thermistors and probe must be checked and calibrated in accordance with 

manufacturer's instructions.

Comments: Not evaluated using manifold tank systems.

Tests only portion of tank containing product.

As product level is lowered, leak rate in a leaking tank decreases (due to lower head 

pressure). Consistent testing at low levels could allow a leak to remain undetected.

EPA leak detection regulations require testing of the portion of the tank system which 

routinely contains product.

Veeder-Root Evaluator: Midwest Research Institute

125 Powder Forest Dr. Tel: (816) 753-7600

Simsbury, CT 06070-2003 Date of Evaluation: 05/14/93

Tel: (860) 651-2700
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

340

Revision Date: September 11, 1998

Veeder-Root

TLS-200, 200i, 250, 250i, 300, 300C, 300i, 300PC, 350, 350PC, 350R, 350RPC UST ATGS 

(Model 8473 Digital Sensing Magnetostrictive Probe)

AUTOMATIC TANK GAUGING METHOD

Certification: Leak rate of 0.1 gph with PD = 99% and PFA = 1%. 

Leak Threshold: 0.071 gph. A tank system should not be declared tight if the test result indicates a 

loss or gain that equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel, and waste oil, solvents. 

Other liquids may be tested after consultation with the manufacturer.

Tank Capacity: Maximum of 15,000 gallons.

Tank must be minimum 95% full.

Waiting Time: Minimum of 8 hours, 15 minutes between delivery and testing.

Minimum of 30 minutes between dispensing and testing.

There must be no delivery during waiting time.

Test Period: Minimum of 3 hours.

Test data are acquired and recorded by the system’s computer.

Leak rate is calculated from the difference between the first and last data collected.

There must be no dispensing during test.

Temperature: Average for product is determined by a minimum of 5 thermistors.

Water Sensor: Must be used to detect water ingress.

Minimum detectable water level in the tank is 0.544 inch.

Minimum detectable change in water level is 0.027 inch.

Calibration: Thermistors and probe must be checked and calibrated in accordance with 

manufacturer's instructions.

Comments: Not evaluated using manifold tank systems.

Tests only portion of tank containing product.

As product level is lowered, leak rate in a leaking tank decreases (due to lower head 

pressure). Consistent testing at low levels could allow a leak to remain undetected.

EPA leak detection regulations require testing of the portion of the tank system which 

routinely contains product.

Veeder-Root Evaluator: Midwest Research Institute

125 Powder Forest Dr. Tel: (816) 753-7600

Simsbury, CT 06070-2003 Date of Evaluation: 03/14/95

Tel: (860) 651-2700
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

341

Revision Date: May 29, 1998

Veeder-Root

TLS-250, 250i, 300, 300C, 300i, 300PC, 350, 350PC, 350R, 350RPC UST ATGS

(Models 8473, 8493 Magnetostrictive Probes)

AUTOMATIC TANK GAUGING METHOD

Certification: Leak rate of 0.2 gph with PD = 98.9% and PFA = 0.3%.

Leak Threshold: 0.126 gph. A tank system should not be declared tight if the test result indicates a 

loss or gain that equals or exceeds this threshold.

Applicability: Gasoline, diesel, aviation fuel. 

Other liquids maybe tested after consultation with the manufacturer.

Tank Capacity: Maximum of 15,000 gallons.

Tanks less than 95% full may be tested. 

Minimum product level required is based on tank diameter as follows:

48" dia./ min. 18"; 64" dia./ min. 21"; 72" dia./ min. 24"; 96" dia./ min. 30"; 

126" dia./ min. 39". For other diameters, see evaluation report.

Waiting Time: Minimum of 8 hours between delivery and testing.

Minimum of 30 minutes between dispensing and testing.

There must be no delivery during waiting time.

Test Period: Minimum of 2 hours.

Test data are acquired and recorded by the system's computer.

Leak rate is calculated from the difference between the first and last data collected.

There must be no dispensing during test.

Temperature: Average for product is determined by probe which contains 5 thermistors . At least 

one thermistor must be submerged in product during test.

Water Sensor: Must be used to detect water ingress.

Minimum detectable water level in the tank is 0.544 inch.

System is programmed to report water depth only when it exceeds 0.75 inch.

Minimum detectable change in water level is 0.027 inch.

Calibration: Thermistors and probe must be checked and calibrated in accordance with 

manufacturer's instructions.

Comments: Not evaluated using manifold tank systems. 

Tests only portion of tank containing product. 

As product level is lowered, leak rate in a leaking tank decreases (due to lower head 

pressure). Consistent testing at low levels could allow a leak to remain undetected.

EPA leak detection regulations require testing of the portion of the tank which 

routinely contains product.

Veeder-Root Evaluator: Midwest Research Institute

125 Powder Forest Dr. Tel: (816) 753-7600

Simsbury, CT 06070-7684 Date of Evaluation: 09/04/97

Tel: (860) 651-2700
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

342

Revision Date: September 11, 1998

Veeder-Root

TLS-250, 250i, 300, 300C, 300i, 300PC, 350, 350PC, 350R, 350RPC UST ATGS

(Models 8473, 8493 Magnetostrictive Probes)

AUTOMATIC TANK GAUGING METHOD

Certification: Leak rate of 0.1 gph with PD = 95.8% and PFA = 0.9%.

Leak Threshold: 0.071 gph. A tank system should not be declared tight if the test indicates a loss or 

gain that equals or exceeds the threshold.

Applicability: Gasoline, diesel, aviation fuel. 

Other liquids maybe tested after consultation with the manufacturer.

Tank Capacity: Maximum of 15,000 gallons.

Tanks less than 95% full may be tested. 

Minimum product level required is based on tank diameter as follows:

48" dia./ min. 18"; 64" dia./ min. 21"; 72" dia./ min. 24"; 96" dia./ min. 30"; 

126" dia./ min. 39". For other diameters, see evaluation report.

Waiting Time: Minimum of 8 hours between delivery and testing.

Minimum of 30 minutes between dispensing and testing.

There must be no delivery during waiting time.

Test Period: Minimum of 3 hours.

Test data are acquired and recorded by the system's computer.

Leak rate is calculated from the difference between the first and last data collected. 

There must be no dispensing during testing.

Temperature: Average for product is determined by probe which contains 5 thermistors. At least 

one thermistor must be submerged in product during testing.

Water Sensor: Must be used to detect water ingress.

Minimum detectable water level in the tank is 0.544 inches.

System is programmed to report water depth only when it exceeds 0.75 inches. 

Minimum detectable change in water level is 0.027 inches.

Calibration: Thermistors and probe must be checked and calibrated in accordance with 

manufacturer's instructions.

Comments: Not evaluated using manifolded tank systems.

Tests only the portion of tank containing product.

As product level is lowered, leak rate in a leaking tank decreases (due to lower head 

pressure). Consistent testing at low levels could allow a leak to remain undetected.

EPA leak detection regulations require testing of the portion of the tank which 

routinely contains product.

Veeder-Root Midwest Research Institute

125 Powder Forest Dr. Tel: (816) 753-7600

Simsbury, CT 06070-7684 Date of Evaluation: 07/01/98

Tel: (860) 651-2700
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

343

Revision Date: August 23, 1999

Veeder-Root

TLS Series 300, 350, 350R

(Models 8463, 8473, 8493 Magnetostrictive Probes)

AUTOMATIC TANK GAUGING METHOD

Certification: Leak rate of 0.2 gph with PD = 99.5% and PFA = 1.6%.

Leak Threshold: 0.126 gph. A tank system should not be declared tight if the test result indicates a 

loss or gain that equals or exceeds this threshold.

Applicability: Gasoline, diesel, aviation fuel. 

Other liquids maybe tested after consultation with the manufacturer.

Tank Capacity: Maximum of 20,000 gallons.

Tanks less than 95% full may be tested. 

Minimum product level required is based on tank diameter as follows:

48" dia./min. 18"; 64" dia./min. 21"; 72" dia./min. 24"; 96" dia./min. 30"; 

126" dia./min. 39"; 132" dia./min. 39". For other diameters see evaluation report.

Waiting Time: Minimum of 8 hours between delivery and testing.

Minimum of 30 minutes between dispensing and testing.

There must be no delivery during waiting time.

Test Period: Minimum of 2 hours.

Test data are acquired and recorded by the system's computer.

Leak rate is calculated from the difference between the first and last data collected.

There must be no dispensing or delivery during test.

Temperature: Average for product is determined by probe which contains 5 thermistors.

At least two thermistors must be submerged in product during test.

Water Sensor: Must be used to detect water ingress.

Minimum detectable water level in the tank is 0.66 inch.

System is programmed to report water depth only when it exceeds 0.75 inch.

Minimum detectable change in water level is 0.005 inch.

Calibration: Thermistors and probe must be checked and calibrated in accordance with 

manufacturer's instructions.

Comments: Not evaluated using manifold tank systems. 

Tests only portion of tank containing product. 

As product level is lowered, leak rate in a leaking tank decreases (due to lower head 

pressure). Consistent testing at low levels could allow a leak to remain undetected.

EPA leak detection regulations require testing of the portion of the tank which routinely 

contains product.

Veeder-Root Evaluator: Ken Wilcox Associates

125 Powder Forest Dr. Tel: (816) 443-2494

Simsbury, CT 06070-7684 Date of Evaluation: 06/29/98

Tel: (860) 651-2700
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

344

Revision Date: August 23, 1999

Veeder-Root

TLS Series 300, 350, 350R

(Models 8463, 8473, 8493 Magnetostrictive Probes)

AUTOMATIC TANK GAUGING METHOD

Certification: Leak rate of 0.1 gph with:

PD =96.0% and PFA = 3.4% for the 5 hour test,

PD =96.2% and PFA = 2.2% for the 4 hour test,

PD =96.4% and PFA = 1.5% for the 3 hour test,

PD =97.3% and PFA = 2.3% for the 2 hour test.

Leak Threshold: 0.071 gph. A tank system should not be declared tight if the test result indicates a loss or gain that 

equals or exceeds this threshold.

Applicability: Gasoline, diesel, aviation fuel. 

Other liquids maybe tested after consultation with the manufacturer.

Tank Capacity: Maximum of 20,000 gallons.

Tanks less than 95% full may be tested. 

Minimum product level required is based on tank diameter as follows:

48" dia./min. 18"; 64" dia./min. 21"; 72" dia./min. 24"; 96" dia./min. 30"; 

126" dia./min. 39"; 132" dia./min. 39". For other diameters, see evaluation report.

Waiting Time: Minimum of 8 hours between delivery and testing for the 5 hour test.

Minimum of 9 hours between delivery and testing for the 4 hour test.

Minimum of 10 hours between delivery and testing for the 3 hour test.

Minimum of 11 hours between delivery and testing for the 2 hour test.

Minimum of 30 minutes between dispensing and testing.

There must be no delivery during waiting time.

Test Period: Minimum of 2 hours.

Test data are acquired and recorded by the system's computer.

Leak rate is calculated from the difference between the first and last data collected.

There must be no dispensing or delivery during test.

Temperature: Average for product is determined by probe which contains 5 thermistors.

At least two thermistors must be submerged in product during test.

Water Sensor: Must be used to detect w ater ingress.

Minimum detectable water level in the tank is 0.66 inch.

System is programmed to report water depth only when it exceeds 0.75 inch.

Minimum detectable change in water level is 0.027 inch.

Calibration: Thermistors and probe must be checked and calibrated in accordance with manufacturer's 

instructions.

Comments: Not evaluated using manifold tank systems. 

Tests only portion of tank containing product. 

As product level is lowered, leak rate in a leaking tank decreases (due to lower head pressure). 

Consistent testing at low levels could allow a leak to remain undetected.

EPA leak detection regulations require testing of the portion of the tank which routinely contains 

product.

Veeder-Root Evaluator: Ken Wilcox Associates

125 Powder Forest Dr. Tel: (816) 443-2494

Simsbury, CT 06070-7684 Date of Evaluation: 06/29/98
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

345

Tel: (860) 651-2700
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

346

Revision Date: August 23, 1999

Veeder-Root

TLS Series 300, 350, 350R

(Models 8463, 8473, 8493 Magnetostrictive Probes)

AUTOMATIC TANK GAUGING METHOD

Certification: Leak rate of 0.2 gph with PD = 95.6% and PFA = 0.3%.

Leak Threshold: 0.126 gph. A tank system should not be declared tight if the test result indicates a 

loss or gain that equals or exceeds this threshold.

Applicability: Gasoline, diesel, aviation fuel. 

Other liquids maybe tested after consultation with the manufacturer.

Tank Capacity: Maximum of 30,000 gallons.

Tanks less than 95% full may be tested. 

Minimum product level required is based on tank diameter as follows:

48" dia./min. 18"; 64" dia./min. 21"; 72" dia./min. 24"; 96" dia./min. 30"; 

126" dia./min. 39"; 132" dia./min. 39". For other diameters, see evaluation report.

Waiting Time: Minimum of 8 hours between delivery and testing.

Minimum of 30 minutes between dispensing and testing.

There must be no delivery during waiting time.

Test Period: Minimum of 2 hours.

Test data are acquired and recorded by the system's computer.

Leak rate is calculated from the difference between the first and last data collected.

There must be no dispensing or delivery during test.

Temperature: Average for product is determined by probe which contains 5 thermistors.

At least two thermistors must be submerged in product during test.

Water Sensor: Must be used to detect water ingress.

Minimum detectable water level in the tank is 0.66 inch.

System is programmed to report water depth only when it exceeds 0.75 inch.

Minimum detectable change in water level is 0.005 inch.

Calibration: Thermistors and probe must be checked and calibrated in accordance with 

manufacturer's instructions.

Comments: Not evaluated using manifold tank systems. 

Tests only portion of tank containing product. 

As product level is lowered, leak rate in a leaking tank decreases (due to lower head 

pressure). Consistent testing at low levels could allow a leak to remain undetected.

EPA leak detection regulations require testing of the portion of the tank which 

routinely contains product.

Veeder-Root Evaluator: Ken Wilcox Associates

125 Powder Forest Dr. Tel: (816) 443-2494

Simsbury, CT 06070-7684 Date of Evaluation: 08/14/98

Tel: (860) 651-2700
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

347

Revision Date: November 14, 1997

Veeder-Root

TLS Series 300, 400 Monitoring Systems with CSLD 

(Models 8473, 8493 Magnetostrictive Probes)

CONTINUOUS IN-TANK LEAK DETECTION METHOD

Certification: Leak rate of 0.2 gph with PD =100% and PFA = 0%. 

Leak Threshold: 0.16 gph for single tanks at 99% operating mode.

0.15 gph for manifold tank systems at 99% operating mode.

A tank system should not be declared tight, and a message printed for the operator, if the test results 

indicate a loss or gain that exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel, waste oil, solvents.

Tank Capacity: Maximum of 38,170 gallons for single tanks and for all tanks manifolded together.

Contact manufacturer for tank system applications if total tank capacity exceeds 30,000 gallons.

Throughput: Monthly maximum of 221,890 gallons.

Waiting Time: Minimum of 3 hours between delivery and testing.

Temperature: Average for product is determined by a minimum of 5 thermistors.

Water Sensor: Must be used to detect water ingress.

Minimum detectable water level in the tank is 0.54 inch.

Minimum detectable change in water level is 0.027 inch.

Calibration: Thermistors and probe must be checked annually and calibrated if necessary in accordance with 

manufacturer's instructions. 

System set-up menu must be checked to verify that the 99% operating mode option has been 

selected.

Comments: During installation, the set-up menu provides a choice between a 99% or a 95% operating mode. 

This evaluation covers only the 99% operating mode. At this time, there is no evaluation covering the 

95% mode.

System reports a quantitative result of pass or fail.

Evaluated using both single and manifold tank systems.

System collects data at naturally occurring product levels without interfering with normal tank 

operation, and discards data from unstable periods when system performs test. 

Data can be collected at any level above 12 inches of product.

Leak rates above 1 gph are either reported as “fail” or as “no idle.”

For valid monthly testing, a conclusive test report must be produced for each tank every month. 

Systems warns the operator if there are no “ passing” tests completed during the month. For very 

active tanks, a tank shut down may become necessary in order for the system to collect enough 

quiet-time data for a test.

Constant and variable leaks were mathematically induced into tight tank test records which were 

collected by systems installed at various active tank sites.

The data base for evaluation of the system included sites with vapor recovery and blending 

dispensers. 

Tanks used in this evaluation contained gasoline and diesel.

Veeder-Root Evaluator: Midwest Research Institute

125 Powder Forest Dr. Tel: (816) 753-7600

Simsbury, CT 06070-2003 Date of Evaluation: 06/10/96
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

348

Tel: (860) 651-2700
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

349

Revision Date: August 23, 1999

Veeder-Root

ILS-250, ILS-350, TLS-250i, 250i Plus, 300, 300C, 300i, 300PC

TLS-350 Series

Interstitial Liquid Sensor for Steel Tanks (0794390-420, 460)

Interstitial Liquid Sensor for Fiberglass Tanks (0794390-401, 404, 407, 409)

Liquid Sensor for Sumps (0794390-206)

LIQUID-PHASE INTERSTITIAL DETECTOR

Detector:

Output type: qualitative

Sampling frequency: continuous

Operating principle: float switch

Test Results:

Interstitial Liquid Sensor for Steel Tanks 

(0794390-420, 460) unleaded gasoline* synthetic gasoline**

Response time (min) 6.00 6.51

Recovery time (min) <1 <1

Product activation height (cm) 3.67 3.62

Lower detection limit (cm) 4.05 4.17

Interstitial Liquid Sensor for Fiberglass 

Tanks (0794390-401, 404, 407, 409)

Response time (min) 3.66 3.45

Recovery time (min) <1 <1

Product activation height (cm) 1.28 1.27

Lower detection limit (cm) 1.84 1.65

Liquid Sensor for Sumps (0794390-206)

Response time (min) 8.19 8.49

Recovery time (min) <1 <1

Product activation height (cm) 4.12 3.95

Lower detection limit (cm) 4.67 4.36

* ILS-250, TLS-250i, 250i Plus

** ILS-350, TLS-350 Series

Specificity Results (in addition to above):

Activated: diesel fuel, heating oil #2, water.

Comments:

Sensors are reusable.

Veeder-Root Evaluator: Carnegie Mellon Research Institute

125 Powder Forest Dr. Tel: (412) 268-3495

Simsbury, CT 06070-2003 Dates of Evaluation: 07/17/92, 04/22/98

Tel: (860) 651-2700
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

350

Revision Date: August 23, 1999

Veeder-Root

TLS-350 Series

Discriminating Interstitial Liquid Sensor (794380-341),

Dispenser Pan Sensor (794380-320),

Discriminating Containment Sump Sensor (794380-350, 360), 

Discriminating Fibretrench Sensor (794380-360, 361, 362)

LIQUID-PHASE INTERSTITIAL DETECTOR

Detector:

Output type: qualitative

Sampling frequency: continuous

Operating principle: capacitance change/ultrasonic (794380-341), electrical conductivity/ultrasonic 

(794380-320, 350, 360, 361, 362)

Test Results:

Discriminating Interstitial Liquid Sensor (794380-341) unleaded gasoline water

Response time (min) 0.46 1.36

Recovery time (min) <1 <1

Product activation height (cm) 0.23 0.69

Dispenser Pan Sensor (794380-320),

Containment Sump Sensor (794380-350, 360),

Discriminating Fibertrench Sensor (794380-360, 361, 362) low high

Response time (min) 6.59 4.60 5.00

Recovery time (min) 17.17 <1 <1

Product activation height (cm) 3.40 2.45 20.3

 

Specificity Results (in addition to above for 794380-341):

Activated: diesel fuel (at liquid height of 0.37 cm), synthetic gasoline (at 0.35 cm), heating oil #2 

(at 0.43 cm).

Specificity Results (in addition to above for 794380-320, 350):

Activated: diesel fuel (at liquid height of 4.75 cm), synthetic fuel (at 2.58 cm), heating oil #2 

(at 4.67 cm).

Comments:

For Discriminating Fibertrench Sensor (794380-360), lowest water level detection and alarm activation is 

set at 23 inches high and highest water alarm is set at 25 inches high; for (794380-361), values are 13 

inches and 16 inches; for (794380-362), values are 3 inches and 12 inches, (based on manufacturer's 

specifications).

Sensors are reusable.

Veeder-Root Evaluator: Carnegie Mellon Research Institute

125 Powder Forest Dr. Tel: (412) 268-3495

Simsbury, CT 06070-2003 Dates of Evaluation: 06/30/93, 05/26/93,

Tel: (860) 651-2700 06/30/97
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

351

Revision Date: August 28, 1998

Veeder-Root

TLS-350 Series, TLS-300, 300i

Discriminating Dispenser Pan Sensor (794380-322),

Discriminating Containment Sump Sensor (794380-352)

LIQUID-PHASE INTERSTITIAL DETECTOR

Detector:

Output type: qualitative

Sampling frequency: continuous

Operating principle: product permeable, reed switch/float

Test Results:

polymer strip float switch

Discriminating Containment Sump unleaded gasoline diesel fuel water

Sensor (794380-322) low high

Response time (sec) ~10 min 2-12 hrs <1 <1 

Recovery time (sec) N/A* N/A <1 <1 

Lower detection limit - height (cm) N/D* N/D 3.48 31.2

Lower detection limit - thickness (cm) 0.0127 0.0127 N/A N/A

Discriminating Dispenser Pan

Sensor (794380-352)

Response time (sec) ~10 min 2-12 hrs <1 <1

Recovery time (sec) N/A N/A <1 <1

Lower detection limit - height (cm) N/D N/D 3.43 19.4

Lower detection limit - thickness (cm) 0.0127 0.0127 N/A N/A

* See glossary.

Specificity Results (in addition to above):

Activated: synthetic gasoline, jet-A fuel, n-hexane, toluene, xylene(s)

Not activated: water (polymer strip only)

Comments:

Polymer strip is not reusable.

Veeder-Root Evaluator: Ken Wilcox Associates

125 Powder Forest Dr. Tel: (816) 443-2494

Simsbury, CT 06070-2003 Dates of Evaluation: 01/02/95, 06/23/97, 04/20/98

Tel: (860) 651-2700
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

352

Revision Date: November 9, 1998

Veeder-Root

Dispenser Pan Sensor (847990-001) and Differentiating Dispenser Pan Sensor (847990-002)

With Dispenser Control Interface

LIQUID-PHASE INTERSTITIAL DETECTOR

Detector:

Output type: qualitative

Sampling frequency: continuous

Operating principle: product permeable, reed switch/float

Test Results:

polymer strip float switch

Dispenser Pan Sensor (847990-001) unleaded gasoline diesel fuel water

Detection time (sec) <1 <1 <1

Minimum product level (in) 1.71 1.66 1.62

Precision (in) 0.006 0.004 0.008

Differentiating Dispenser Pan Sensor 

(847990-002)

Minimum product thickness (in) 0.06 0.06 N/A*

Minimum product level (in) 0.03 0.06 6.39

Precision (in) N/A** N/A** 0.008

Detection time (min:sec) 06:30 19:50 <00:01

*See glossary.

**Tested at discrete levels only.

Specificity Results (in addition to above):

Activated: synthetic gasoline, n-hexane, toluene, xylene(s)

Not activated: water (polymer strip only)

Comments:

Sensors are reusable.

These sensors do not require a console

Veeder-Root Evaluator: Ken Wilcox Associates, Inc.

125 Powder Forest Dr. Tel: (816) 443-2494

Simsbury, CT 06070-2003 Dates of Evaluation: 11/15/93

Tel: (860) 651-2700 Dates of Revised Evaluation: 11/02/98
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

353

Revision Date: August 23, 1999

Veeder-Root

TLS-350 Series, TLS-300, 300i

Dual and Single Stage Hydrostatic Sensors (794380-301, 302)

LIQUID-PHASE INTERSTITIAL DETECTOR

Detector:

Output type: qualitative

Sampling frequency: continuous 

Operating principle: float switch 

Test Results:

50 % by weight 

ethylene glycol in water

30 % by weight

calcium chloride in water

up down up down

Response time (min) 22.52 35.75 20.46 37.07

Recovery time (min) <1 <1 <1 <1

Product activation height (cm) 33.1 3.9 32.2 4.0

 

Comments:

Intended to monitor level of either ethylene glycol or calcium chloride solutions in interstitial or annular 

space of a double-walled tank. 

Activates alarm if any significant gain or loss of solution occurs. 

Sensors are reusable.

Veeder-Root Evaluator: Carnegie Mellon Research Institute

125 Powder Forest Dr. Tel: (412) 268-3495

Simsbury, CT 06070-2003 Dates of Evaluation: 12/07/92, 03/16/98

Tel: (860) 651-2700
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

354

Revision Date: August 23, 1999

Veeder-Root

TLS-300C, 300i, 300PC, 350, 350PC, 350R, 350RPC

Solid-State Pan/Sump Sensor (794380-321, 351),

Piping Sump Sensor (794380-208, 209),

Micro Sensor (794380-340)

LIQUID-PHASE INTERSTITIAL DETECTOR

Detector:

Output type: qualitative

Sampling frequency: continuous

Operating principle: product permeable, ultrasonic/float switch

Test Results:

Piping Sump Sensor (794380-208, 209) unleaded gasoline diesel fuel water

Min. product level (cm) 3.51 3.40 3.03

Precision 0.011 0.011 0.011

Detection time (sec) <1 <1 <1

Solid-State Pan/Sump Sensor (794380-321, 351)

Minimum product thickness (cm) 2.60 2.50 2.60

Precision 0.010 0.010 0.010

Detection time (sec) <1 <1 <1

Micro Sensor (794380-340)

Minimum product thickness (cm) 0.51 0.46 0.48

Precision 0.011 0.007 0.007

Detection time (sec) <1 <1 <1

Comments:

Sensors are reusable.

208 and 209 sensors are also compatible with 300 series.

Veeder-Root Evaluator: Ken Wilcox Associates, Inc.

125 Powder Forest Dr. Tel: (816) 443-2494

Simsbury, CT 06070-2003 Dates of Evaluation: 10/20/94

Tel: (860) 651-2700
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

355

Revision Date: August 23, 1999

Veeder-Root

350 Series UST Monitoring Systems

Models ILS-350, TLS-350, 350R, 350PC, 350RPC

Groundwater Sensor (794380-621, 622, 624)

LIQUID-PHASE OUT-OF-TANK PRODUCT DETECTOR

Detector:

Output type: qualitative

Sampling frequency: continuous

Operating principle: electrical conductivity

Test Results:

unleaded gasoline synthetic gasoline

Detection time (min:sec) 8:55 6:18

Fall time (min:sec) 54:50 26:02

Lower detection limit (cm) 0.02 0.02

Specificity Results (in addition to above):

Activated: n-hexane, diesel fuel, jet-A fuel, toluene, xylene(s).

Calibration: 

Sensor must be checked annually for operability or in accordance with manufacturer’s instructions and

calibrate/replaced if necessary.

Comments:

Sensors are reusable.

Veeder-Root Evaluator: Carnegie Mellon Research Institute

125 Powder Forest Dr. Tel: (412) 268-3495

Simsbury, CT 06070-2003 Dates of Evaluation: 11/20/91, 07/28/92

Tel: (860) 651-2700
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

356

Revision Date: August 23, 1999

Veeder-Root

ILS-350, TLS-350 Series

Adsistor Vapor Probes (794390-700)

VAPOR-PHASE OUT-OF-TANK PRODUCT DETECTOR

Detector:

Output type: qualitative

Sampling frequency: continuous

Operating principle: adsistor

Test Results:

unleaded gasoline synthetic gasoline JP-4 jet fuel

Accuracy (%) 100 0 100

Detection time (min:sec) 7:46 N/A* 17:01

Fall time (min:sec) 2:38 N/A 3:05

Lower detection limit (ppm) 500 >1000 500

*See Glossary.

Specificity Results:

Not Activated: synthetic gasoline, n-hexane, toluene, xylene(s).

Veeder-Root Evaluator: Carnegie Mellon Research Institute

125 Powder Forest Dr. Tel: (412) 268-3495

Simsbury, CT 06070-2003 Date of Evaluation: 07/24/92

Tel: (860) 651-2700
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

357

Revision Date: August 23, 1999

Vista Research, Inc. and Naval Facilities Engineering Service Center

LRDP-24 (V1.0.2,V1.0.3)

BULK FIELD-CONSTRUCTED TANK TIGHTNESS TEST LEAK DETECTION METHOD

Certification: Leak rate is proportional to product surface area (PSA).

For tanks with PSA of 6,082 ft2, leak rate is 2.0 or 3.0 gph with PD = 95% and PFA < .001%. Choose one to 

determine the scaled leak rate and scaled leak threshold for the tank being monitored. For other tank 

sizes, scaled leak rate equals [(PSA in ft2 ÷ 6,082 ft2) x (leak rate in gph)].

Example: For a tank with PSA = 10,000 ft2, leak rate = 2.0 gph; scaled leak rate = [(10,000 ft2 ÷ 6,082 ft2) 

x 2.0 gph] = 3.29 gph.

Calculated minimum detectable leak rate is 0.446 gph with PD = 95% and PFA = 5%.

Leak rate may not be scaled below 0.2 gph.

Leak Threshold: Leak threshold is proportional to product surface area (PSA).

For tanks with PSA of 6,082 ft2 and leak rate of 2.0 or 3.0 gph, leak threshold is 1.777 or 2.77gph 

respectively. For other tank sizes, scaled leak threshold equals [(PSA in ft2 ÷ 6,082 ft2) x (leak rate in gph 

- 0.223 gph)].

Example: For a tank with PSA = 10,000 ft2, leak rate = 2.0 gph; scaled leak threshold = [(10,000 ft2 ÷ 6,082 

ft2) x (2.0 gph - 0.223 gph)] = 2.92 gph.

A tank system should not be declared tight if the test result indicates a loss or gain that equals or exceeds 

the calculated leak threshold. 

Applicability: Gasoline, diesel, aviation fuel. Other liquids may be tested after consultation with the manufacturer.

Tank Capacity: Use limited to single field-constructed vertical tanks larger than 50,000 gallons. 

Maximum product surface area (PSA) is 15,205 ft2 (approximately 139 ft. diameter).

Performance not sensitive to product level.

Waiting Time: Minimum of 24 hours after delivery or dispensing. Valve leaks and pump drain-back may mask a leak. 

Allow sufficient waiting time to minimize these effects. 

Waiting times during evaluation ranged from 16.08 to 115.8 hours.

Test Period: Minimum of 24 hours.

There must be no dispensing or delivery during test.

Temperature: Measurement not required by this system.

Water Sensor: None. Water leaks are measured as increase in mass inside tank.

Calibration: Differential pressure sensor must be checked regularly in accordance with manufacturer's instructions.

Comments: Tests only portion of tank containing product.

As product level is lowered, leak rate in a leaking tank decreases (due to lower head pressure). 

Consistent testing at low levels could allow a leak to remain undetected.

Evaluated in a nominal 600,000 gallon, vertical underground tank with product surface area (PSA) of 

6,082 ft2.

Not evaluated as a stand alone system.

Significant bias of 0.103 gph was detected during the evaluation. Evaluator believes this bias was the 

result of product inflow into the tank from valve leaks and product drain back from the pump return line 

and thus evaluator did not use this bias in calculating above results.

Performance of the system can be improved by combining results of 2 or more tests. If this option is 

used, it is important to determine the number of tests, their timing and the number of passing results 

necessary to confirm a tank is tight. The LRDP-24-5 (V1.0) combines the results of 5 tests and is one 

evaluated option to improve the performance of this system.
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

358

Vista Research, Inc. Evaluator: Ken Wilcox Associates

100 View St. Tel: (816) 443-2494

Mountain View, CA 94042 Date of Evaluation: 01/29/99

Tel: (650) 966-1171 
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

359

Revision Date: August 23, 1999

Vista Research, Inc. and Naval Facilities Engineering Service Center

LRDP-48 (V1.0.2,V1.0.3)

BULK FIELD-CONSTRUCTED TANK TIGHTNESS TEST LEAK DETECTION METHOD

Certification: Leak rate is proportional to product surface area (PSA).

For tanks with PSA of 6,082 ft2, leak rate is 2.0 or 3.0 gph with PD = 95% and PFA < 0.001%. Choose one 

to determine the scaled leak rate and scaled leak threshold for the tank being monitored. For other tank 

sizes, scaled leak rate equals [(PSA in ft2 ÷ 6,082 ft2) x (leak rate in gph)].

Example: For a tank with PSA = 10,000 ft2, leak rate = 2.0 gph; scaled leak rate = [(10,000 ft2 ÷ 6,082 ft2) 

x 2.0 gph] = 3.29 gph.

Calculated minimum detectable leak rate is 0.376 gph with PD = 95% and PFA = 5%.

Leak rate may not be scaled below 0.2 gph.

Leak Threshold: Leak threshold is proportional to product surface area (PSA).

For tanks with PSA of 6,082 ft2 and leak rate of 2.0 or 3.0 gph, leak threshold is 1.812 or 2.812 gph 

respectively. For other tank sizes, scaled leak threshold equals [(PSA in ft2 ÷ 6,082 ft2) x (leak rate in gph 

- 0.188 gph)].

Example: For a tank with PSA = 10,000 ft2, leak rate = 2.0 gph; scaled leak threshold = [(10,000 ft2 ÷ 6,082 

ft2) x (2.0 gph - 0.188 gph)] = 2.98 gph.

A tank system should not be declared tight if the test result indicates a loss or gain that equals or exceeds 

the calculated leak threshold. 

Applicability: Gasoline, diesel, aviation fuel. Other liquids may be tested after consultation with the manufacturer.

Tank Capacity: Use limited to single field-constructed vertical tanks larger than 50,000 gallons. 

Maximum product surface area (PSA) is 15,205 ft2 (approximately 139 ft. diameter).

Performance not sensitive to product level.

Waiting Time: Minimum of 24 hours after delivery or dispensing. Valve leaks and pump drain-back may mask a leak. 

Allow sufficient waiting time to minimize these effects. 

Waiting times during evaluation ranged from 16.08 to 115.8 hours.

Test Period: Minimum of 48 hours.

There must be no dispensing or delivery during test.

Temperature: Measurement not required by this system.

Water Sensor: None. Water leaks are measured as increase in mass inside tank.

Calibration: Differential pressure sensor must be checked regularly in accordance with manufacturer's instructions.

Comments: Tests only portion of tank containing product.

As product level is lowered, leak rate in a leaking tank decreases (due to lower head pressure). 

Consistent testing at low levels could allow a leak to remain undetected.

Evaluated in a nominal 600,000 gallon, vertical underground tank with product surface area (PSA) of 

6,082 ft2.

Not evaluated as a stand alone system.

Significant bias of 0.078 gph was detected during the evaluation. Evaluator believes this bias was the 

result of product inflow into the tank from valve leaks and product drain back from the pump return line 

and thus evaluator did not use this bias in calculating above results.

Performance of the system can be improved by combining results of 2 or more tests. If this option is 

used, it is important to determine the number of tests, their timing and the number of passing results 

necessary to confirm a tank is tight. The LRDP-48-4 (V1.0) combines the results of 4 tests and is one 

evaluated option to improve the performance of this system.
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

360

Vista Research, Inc. Evaluator: Ken Wilcox Associates

100 View St. Tel: (816) 443-2494

Mountain View, CA 94042 Date of Evaluation: 01/29/99

Tel: (650) 966-1171 
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

361

Revision Date: August 23, 1999

Vista Research, Inc. and Naval Facilities Engineering Service Center

LRDP-24 (V1.1)

BULK FIELD-CONSTRUCTED TANK TIGHTNESS TEST LEAK DETECTION METHOD

Certification: Leak rate is proportional to product surface area (PSA).

For tanks with PSA of 6,082 ft2, leak rate is 0.856 gph with PD = 95% and PFA =0.017%. For other tank 

sizes, leak rate equals [(PSA in ft2 ÷ 6,082 ft2) x 0.856 gph].

Example: For a tank with PSA = 10,000 ft2; leak rate = [(10,000 ft2 ÷ 6,082 ft2) x 0.856 gph] = 1.407 gph.

Calculated minimum detectable leak rate is 0.446 gph with PD = 95% and PFA = 5%.

Leak rate may not be scaled below 0.2 gph.

Leak Threshold: Leak threshold is proportional to product surface area (PSA).

For tanks with PSA of 6,082 ft2, leak threshold is 0.632 gph. For other tank sizes, leak threshold equals 

[(PSA in ft2 ÷ 6,082 ft2) x 0.632 gph].

Example: For a tank with PSA = 10,000 ft2; leak threshold = [(10,000 ft2 ÷ 6,082 ft2) x 0.632 gph] = 1.039 

gph.

A tank system should not be declared tight if the test result indicates a loss or gain that equals or exceeds 

the calculated leak threshold. 

Applicability: Gasoline, diesel, aviation fuel. Other liquids may be tested after consultation with the manufacturer.

Tank Capacity: Use limited to single field-constructed vertical tanks larger than 50,000 gallons. 

Maximum product surface area (PSA) is 15,205 ft2 (approximately 139 ft. diameter).

Performance not sensitive to product level.

Waiting Time: Minimum of 24 hours after delivery or dispensing. Valve leaks and pump drain-back may mask a leak. 

Allow sufficient waiting time to minimize these effects. 

Waiting times during evaluation ranged from 16.08 to 115.8 hours.

Test Period: Minimum of 24 hours.

There must be no dispensing or delivery during test.

Temperature: Measurement not required by this system.

Water Sensor: None. Water leaks are measured as increase in mass inside tank.

Calibration: Differential pressure sensor must be checked regularly in accordance with manufacturer's instructions.

Comments: Tests only portion of tank containing product.

As product level is lowered, leak rate in a leaking tank decreases (due to lower head pressure). 

Consistent testing at low levels could allow a leak to remain undetected.

Evaluated in a nominal 600,000 gallon, vertical underground tank with product surface area (PSA) of 

6,082 ft2.

Not evaluated as a stand alone system.

Significant bias of 0.103 gph was detected during the evaluation. Evaluator believes this bias was the 

result of product inflow into the tank from valve leaks and product drain back from the pump return line 

and thus evaluator did not use this bias in calculating above results.

Performance of the system can be improved by combining results of 2 or more tests. If this option is 

used, it is important to determine the number of tests, their timing and the number of passing results 

necessary to confirm a tank is tight. The LRDP-24-5 (V1.1) combines the results of 5 tests and is one 

evaluated option to improve the performance of this system.

Vista Research, Inc. Evaluator: Ken Wilcox Associates

100 View St. Tel: (816) 443-2494

Mountain View, CA 94042 Date of Evaluation: 01/29/99

Tel: (650) 966-1171 
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

362

Revision Date: August 23, 1999

Vista Research, Inc. and Naval Facilities Engineering Service Center

LRDP-48 (V1.1)

BULK FIELD-CONSTRUCTED TANK TIGHTNESS TEST LEAK DETECTION METHOD

Certification: Leak rate is proportional to product surface area (PSA).

For tanks with PSA of 6,082 ft2, leak rate is 0.749 gph with PD = 95% and PFA =0.012%. For other tank 

sizes, leak rate equals [(PSA in ft2 ÷ 6,082 ft2) x 0.749 gph].

Example: For a tank with PSA = 10,000 ft2; leak rate = [(10,000 ft2 ÷ 6,082 ft2) x 0.749 gph] = 1.232 gph.

Calculated minimum detectable leak rate is 0.376 gph with PD = 95% and PFA = 5%.

Leak rate may not be scaled below 0.2 gph.

Leak Threshold: Leak threshold is proportional to product surface area (PSA).

For tanks with PSA of 6,082 ft2, leak threshold is 0.563 gph. For other tank sizes, leak threshold equals 

[(PSA in ft2 ÷ 6,082 ft2) x 0.563 gph].

Example: For a tank with PSA = 10,000 ft2; leak threshold = [(10,000 ft2 ÷ 6,082 ft2) x 0.563 gph] = 0.926 

gph.

A tank system should not be declared tight if the test result indicates a loss or gain that equals or exceeds 

the calculated leak threshold. 

Applicability: Gasoline, diesel, aviation fuel. Other liquids may be tested after consultation with the manufacturer.

Tank Capacity: Use limited to single field-constructed vertical tanks larger than 50,000 gallons. 

Maximum product surface area (PSA) is 15,205 ft2 (approximately 139 ft. diameter).

Performance not sensitive to product level.

Waiting Time: Minimum of 24 hours after delivery or dispensing. Valve leaks and pump drain-back may mask a

leak. Allow sufficient waiting time to minimize these effects. 

Waiting times during evaluation ranged from 16.08 to 115.8 hours.

Test Period: Minimum of 48 hours.

There must be no dispensing or delivery during test.

Temperature: Measurement not required by this system.

Water Sensor: None. Water leaks are measured as increase in mass inside tank.

Calibration: Differential pressure sensor must be checked regularly in accordance with manufacturer's instructions.

Comments: Tests only portion of tank containing product.

As product level is lowered, leak rate in a leaking tank decreases (due to lower head pressure). 

Consistent testing at low levels could allow a leak to remain undetected.

Evaluated in a nominal 600,000 gallon, vertical underground tank with product surface area (PSA) of 

6,082 ft2.

Not evaluated as a stand alone system. 

Significant bias of 0.078 gph was detected during the evaluation. Evaluator believes this bias was the 

result of product inflow into the tank from valve leaks and product drain back from the pump return line 

and thus evaluator did not use this bias in calculating above results.

Performance of the system can be improved by combining results of 2 or more tests. If this option is 

used, it is important to determine the number of tests, their timing and the number of passing results 

necessary to confirm a tank is tight. The LRDP-24-5 (V1.1) combines the results of 5 tests and is one 

evaluated option to improve the performance of this system.

Vista Research, Inc. Evaluator: Ken Wilcox Associates

100 View St. Tel: (816) 443-2494

Mountain View, CA 94042 Date of Evaluation: 01/29/99

Tel: (650) 966-1171 
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

363

Revision Date: August 23, 1999

Vista Research, Inc.

Model HT-100 Monitoring or Line Tightness Test

Version 1.0

LARGE DIAMETER PIPELINE LEAK DETECTOR

Certification: Leak rate of 0.004% of line capacity in gph with PD = 95% and PFA = 1.25%,

(smallest leak rate for this evaluation, which was conducted on a 306,477 gallon line 

at 160 psi, was 12.3 gph).

Leak Threshold: 0.00282% of line volume in gph. A pipeline system should not be declared tight if 

the test result indicates a loss that equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel, fuel oil #4, waste oil, solvents.

Specification: System tests fiberglass or steel piping.

Tests are conducted at operating pressure to a maximum of 200 psi.

Pipeline Capacity: Maximum of 612,954 gallons.

Minimum of 3,000 gallons.

Waiting Time: None between delivery and testing.

None between dispensing and testing.

Test Period: Minimum of 3 hours, 10 minutes after setup and after pipeline is fully isolated.

Test data are acquired and recorded by a microprocessor.

Calculations are automatically performed by the microprocessor.

System Features: System may be permanently installed on pipeline to perform monitoring, or may be 

transported and set up to perform line tightness testing.

A single 3-hour 10-minute test is required consisting of a 1-hour 10-minute 

monitoring period at operating pressure, and a 2-hour monitoring period at 

atmospheric pressure.

System measures change in volume and reports output quantity in gph, while 

compensating for thermal effects.

Printed message and alarm activation if leak is declared.

Calibration: System must be calibrated in accordance with manufacturer’s instructions.

Comments: System is to be used only on large bulk pipelines and airport hydrant fueling 

systems.

This evaluation utilized a total of 87 tests, one with an induced leak rate of 13.1 gph.

Vista Research, Inc. Evaluator: Ken Wilcox Associates

100 View St. Tel: (816) 443-2494

Mountain View, CA 94042 Date of Evaluation: 11/06/98

Tel: (650) 966-1171 
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

364

Revision Date: August 23, 1999

Vista Research, Inc.

Model HT-100 Monitoring or Line Tightness Test

Version 1.1

LARGE DIAMETER PIPELINE LEAK DETECTOR

Certification: Leak rate of 0.00209% of line capacity in gph with PD = 95% and PFA = 5%,

(smallest leak rate for this evaluation, which was conducted on a 306,477 gallon line 

at 160 psi, was 6.42 gph).

Leak Threshold: 0.000916% of line volume in gph. A pipeline system should not be declared tight if 

the test result indicates a loss that equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel, fuel oil #4, waste oil, solvents.

Specification: System tests fiberglass or steel piping.

Tests are conducted at operating pressure to a maximum of 200 psi.

Pipeline Capacity: Maximum of 612,954 gallons.

Minimum of 3,000 gallons.

Waiting Time: None between delivery and testing.

None between dispensing and testing.

Test Period: Minimum of 3 hours, 10 minutes after setup and after pipeline is fully isolated.

Test data are acquired and recorded by a microprocessor.

Calculations are automatically performed by the microprocessor.

System Features: System may be permanently installed on pipeline to perform monitoring, or may be 

transported and set up to perform line tightness testing.

A single 3-hour 10-minute test is required consisting of a 1-hour 10-minute 

monitoring period at operating pressure, and a 2-hour monitoring period at 

atmospheric pressure.

System measures change in volume and reports output quantity in gph, while 

compensating for thermal effects.

Printed message and alarm activation if leak is declared.

Calibration: System must be calibrated in accordance with manufacturer’s instructions.

Comments: System is to be used only on large bulk pipelines and airport hydrant fueling 

systems.

This evaluation utilized a total of 87 tests, one with an induced leak rate of 13.1 gph.

Vista Research, Inc. Evaluator: Ken Wilcox Associates

100 View St. Tel: (816) 443-2494

Mountain View, CA 94042 Date of Evaluation: 11/06/98

Tel: (650) 966-1171 
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

365

Revision Date: August 23, 1999

Vista Research, Inc.

Model HT-100-n Monitoring or Line Tightness Test

Version 1.0

LARGE DIAMETER PIPELINE LEAK DETECTOR

Certification: Leak rate of 0.004%÷  ̄(n) of line capacity in gph with PD = 95% and PFA = 1.25%, 

where n is the number of tests averaged together (smallest leak rate for this 

evaluation, which was conducted on a 306,477 gallon line at 160 psi where n = 3, 

was 7.08 gph).

Leak Threshold: 0.00282% ÷  ̄(n) of line volume in gph. A pipeline system should not be declared 

tight if the test result indicates a loss that equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel, fuel oil #4, waste oil, solvents.

Specification: System tests fiberglass or steel piping.

Tests are conducted at operating pressure to a maximum of 200 psi.

Pipeline Capacity: Maximum of 612,954 gallons.

Minimum of 3,000 gallons.

Waiting Time: None between delivery and testing.

None between dispensing and testing.

Test Period: Minimum of 3 hours, 10 minutes after setup and after pipeline is fully isolated.

Test data are acquired and recorded by a microprocessor.

Calculations are automatically performed by the microprocessor.

Averaging of individual tests, where tests may be selected over any time frame yet 

not necessarily consecutive.

System Features: System may be permanently installed on pipeline to perform monitoring, or may be 

transported and set up to perform line tightness testing.

A single 3-hour 10-minute test is required consisting of a 1-hour 10-minute 

monitoring period at operating pressure, and a 2-hour monitoring period at 

atmospheric pressure.

System measures change in volume and reports output quantity in gph, while 

compensating for thermal effects.

Printed message and alarm activation if leak is declared.

Calibration: System must be calibrated in accordance with manufacturer’s instructions.

Comments: System is to be used only on large bulk pipelines and airport hydrant fueling 

systems.

This evaluation utilized a total of 87 tests, one with an induced leak rate of 13.1 gph. 

Vista Research, Inc. Evaluator: Ken Wilcox Associates

100 View St. Tel: (816) 443-2494

Mountain View, CA 94042 Date of Evaluation: 11/24/98

Tel: (650) 966-1171 
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

366

Revision Date: August 23, 1999

Vista Research, Inc.

Model HT-100-n Monitoring or Line Tightness Test

Version 1.1

LARGE DIAMETER PIPELINE LEAK DETECTOR

Certification: Leak rate of 0.00209%÷  ̄(n) of line capacity in gph with PD = 95% and PFA = 5%, 

where n is the number of tests averaged together (smallest leak rate for this 

evaluation, which was conducted on a 306,477 gallon line at 160 psi where n = 3, 

was 3.71 gph).

Leak Threshold: 0.000916% ÷  ̄(n) of line volume in gph. A pipeline system should not be declared 

tight if the test result indicates a loss that equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel, fuel oil #4, waste oil, solvents.

Specification: System tests fiberglass or steel piping.

Tests are conducted at operating pressure to a maximum of 200 psi.

Pipeline Capacity: Maximum of 612,954 gallons.

Minimum of 3,000 gallons.

Waiting Time: None between delivery and testing.

None between dispensing and testing.

Test Period: Minimum of 3 hours, 10 minutes after setup and after pipeline is fully isolated.

Test data are acquired and recorded by a microprocessor.

Calculations are automatically performed by the microprocessor.

Averaging of individual tests, where tests may be selected over any time frame yet 

not necessarily consecutive.

System Features: System may be permanently installed on pipeline to perform monitoring, or may be 

transported and set up to perform line tightness testing.

A single 3-hour 10-minute test is required consisting of a 1-hour 10-minute 

monitoring period at operating pressure, and a 2-hour monitoring period at 

atmospheric pressure.

System measures change in volume and reports output quantity in gph, while 

compensating for thermal effects.

Printed message and alarm activation if leak is declared.

Calibration: System must be calibrated in accordance with manufacturer’s instructions.

Comments: System is to be used only on large bulk pipelines and airport hydrant fueling 

systems.

This evaluation utilized a total of 87 tests, one with an induced leak rate of 13.1 gph.

Vista Research, Inc. Evaluator: Ken Wilcox Associates

100 View St. Tel: (816) 443-2494

Mountain View, CA 94042 Date of Evaluation: 11/24/98

Tel: (650) 966-1171 
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

367

Revision Date: November 6, 1997

Vista Research, Inc.

Model LT-100 Manual Method

Version 1.0

LARGE DIAMETER PIPELINE LEAK DETECTOR

Certification: Leak rate of 0.2 gph with PD = 96% and PFA < 4%.

Leak Threshold: 0.177 gph. A pipeline system should not be declared tight if the test result indicates 

a loss that equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel, fuel oil #4, waste oil, solvents.

Specification: System tests fiberglass or steel piping.

Tests are conducted at operating pressure to a maximum of 200 psi.

Pipeline Capacity: Maximum of 3,400 gallons.

Waiting Time: None between delivery and testing.

None between dispensing and testing.

Test Period: Minimum of 2 hours after setup and after pipeline is fully isolated.

Test data are acquired and recorded manually. 

Calculations are performed by tester.

System Features: System may be permanently installed on pipeline to perform monthly monitoring or 

line tightness testing, or may be transported and set up to perform line tightness 

testing.

A single 2-hour test is required consisting of a 1-hour monitoring period at operating 

pressure and a 1-hour monitoring period at atmospheric pressure.

Preset threshold.

Printed message and alarm activation if leak is declared.

Calibration: System must be calibrated in accordance with manufacturer’s instructions during 

system setup.

Vista Research, Inc. Evaluator: Ken Wilcox Associates

100 View St. Tel: (816) 443-2494

Mountain View, CA 94042 Date of Evaluation: 04/15/96

Tel: (650) 966-1171 
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

368

Revision Date: November 6, 1997

Vista Research, Inc.

Model LT-100 Manual Method

Version 1.0

LARGE DIAMETER PIPELINE LEAK DETECTOR

Certification: Leak rate of 0.1 gph with PD = 96% and PFA = 4%.

Leak Threshold: 0.077 gph. A pipeline system should not be declared tight if the test result indicates 

a loss that equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel, fuel oil #4, waste oil, solvents.

Specification: System tests fiberglass or steel piping.

Tests are conducted at operating pressure to a maximum of 200 psi.

Pipeline Capacity: Maximum of 3,400 gallons.

Waiting Time: None between delivery and testing.

None between dispensing and testing.

Test Period: Minimum of 2 hours after setup and after pipeline is fully isolated.

Test data are acquired and recorded manually. 

Calculations are performed by tester.

System Features: System may be permanently installed on pipeline to perform monthly monitoring or 

line tightness testing, or may be transported and set up to perform line tightness 

testing.

A single 2-hour test is required consisting of a 1-hour monitoring period at operating 

pressure and a 1-hour monitoring period at atmospheric pressure.

Preset threshold.

Printed message and alarm activation if leak is declared.

Calibration: System must be calibrated in accordance with manufacturer’s instructions during 

system setup.

Vista Research, Inc. Evaluator: Ken Wilcox Associates

100 View St. Tel: (816) 443-2494

Mountain View, CA 94042 Date of Evaluation: 04/15/96

Tel: (650) 966-1171 
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

369

Revision Date: November 6, 1997

Vista Research, Inc.

Model LT-100 Primary Method

Version 1.0

LARGE DIAMETER PIPELINE LEAK DETECTOR

Certification: Leak rate of 0.2 gph with PD = 97% and PFA < 3%.

Leak Threshold: 0.148 gph. A pipeline system should not be declared tight if the test result indicates 

a loss that equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel, fuel oil #4, waste oil, solvents.

Specification: System tests fiberglass or steel piping.

Tests are conducted at operating pressure to a maximum of 200 psi.

Pipeline Capacity: Maximum of 3,400 gallons.

Waiting Time: None between delivery and testing.

None between dispensing and testing.

Test Period: Maximum of 2 hours after setup and after pipeline is fully isolated.

Test data are acquired and recorded by a microprocessor.

Calculations are automatically performed by the microprocessor.

System Features: System may be permanently installed on pipeline to perform monthly monitoring or 

line lightness testing, or may be transported and set up to perform line tightness 

testing.

A single 2-hour test is required consisting of a 1-hour monitoring period at operating 

pressure, and a 1-hour monitoring period at atmospheric pressure.

Preset threshold.

Printed message and alarm activation if leak is declared.

Calibration: System must be calibrated in accordance with manufacturer’s instructions during 

system setup.

Vista Research, Inc. Evaluator: Ken Wilcox Associates

100 View St. Tel: (816) 443-2494

Mountain View, CA 94042 Date of Evaluation: 04/15/96

Tel: (650) 966-1171 
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

370

Revision Date: November 6, 1997

Vista Research, Inc.

Model LT-100 Primary Method

Version 1.0

LARGE DIAMETER PIPELINE LEAK DETECTOR

Certification: Leak rate of 0.1 gph with PD = 97% and PFA = 3%.

Leak Threshold: 0.060 gph. A pipeline system should not be declared tight if the test result indicates 

a loss that equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel, fuel oil #4, waste oil, solvents.

Specification: System tests fiberglass or steel piping.

Tests are conducted at operating pressure to a maximum of 200 psi.

Pipeline Capacity: Maximum of 3,400 gallons.

Waiting Time: None between delivery and testing.

None between dispensing and testing.

Test Period: Minimum of 2 hours after setup and after pipeline is fully isolated.

Test data are acquired and recorded by a microprocessor.

Calculations are automatically performed by the microprocessor.

System Features: System may be permanently installed on pipeline to perform monthly monitoring or 

line tightness testing, or may be transported and set up to perform line tightness 

testing.

A single 2-hour test is required consisting of a 1 hour monitoring period at operating 

pressure, and a 1 hour monitoring period at atmospheric pressure. 

Preset threshold.

Printed message and alarm activation if leak is declared.

Calibration: System must be calibrated in accordance with manufacturer’s instructions during 

system setup.

Vista Research, Inc. Evaluator: Ken Wilcox Associates

100 View St. Tel: (816) 443-2494

Mountain View, CA 94042 Date of Evaluation: 04/15/96

Tel: (650) 966-1171 
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

371

Revision Date: November 6, 1997

Vista Research, Inc.

Model LT-100 Segmented Method

Version 1.0

LARGE DIAMETER PIPELINE LEAK DETECTOR

Certification: Leak rate of 0.2 gph with PD = 97% and PFA = 3%.

Leak Threshold: 0.174 gph. A pipeline system should not be declared tight if the test result indicates 

a loss that equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel, fuel oil #4, waste oil, solvents.

Specification: System tests fiberglass or steel piping.

Tests are conducted at operating pressure to a maximum of 200 psi.

Pipeline Capacity: Maximum of 3,400 gallons.

Waiting Time: None between delivery and testing.

None between dispensing and testing.

Test Period: Minimum of 2 hours after setup and after pipeline is fully isolated.

Test data are acquired and recorded by a microprocessor.

Calculations are automatically performed by the microprocessor.

System Features: System may be permanently installed on pipeline to perform monthly monitoring or 

line tightness testing, or may be transported and set up to perform line tightness 

testing.

A single 2-hour test is required consisting of two 5-minute monitoring segments at 

atmospheric pressure spaced 25 minutes apart, and two 5-minute monitoring 

segments at operating pressure spaced 25 minutes apart. 

Preset threshold.

Printed message and alarm activation if leak is declared.

Calibration: System must be calibrated in accordance with manufacturer’s instructions during 

system setup.

Vista Research, Inc. Evaluator: Ken Wilcox Associates

100 View St. Tel: (816) 443-2494

Mountain View, CA 94042 Date of Evaluation: 04/15/96

Tel: (650) 966-1171 
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

372

Revision Date: November 6, 1997

Vista Research, Inc.

Model LT-100 Segmented Method

Version 1.0

LARGE DIAMETER PIPELINE LEAK DETECTOR

Certification: Leak rate of 0.1 gph with PD = 97% and PFA = 3%.

Leak Threshold: 0.074 gph. A pipeline system should not be declared tight if the test result indicates 

a loss that equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel, fuel oil #4, waste oil, solvents.

Specification: System tests fiberglass or steel piping.

Tests are conducted at operating pressure to a maximum of 200 psi.

Pipeline Capacity: Maximum of 3,400 gallons.

Waiting Time: None between delivery and testing.

None between dispensing and testing.

Test Period: Minimum of 2 hours after setup and after pipeline is fully isolated.

Test data are acquired and recorded by a microprocessor.

Calculations are automatically performed by the microprocessor.

System Features: System may be permanently installed on pipeline to perform monthly monitoring or 

line tightness testing, or may be transported and set up to perform line tightness 

testing.

A single 2-hour test is required consisting of two 5-minute monitoring segments at 

atmospheric pressure spaced 25 minutes apart, and two 5-minute monitoring 

segments at operating pressure spaced 25 minutes apart. 

Preset threshold.

Printed message and alarm activation if leak is declared.

Calibration: System must be calibrated in accordance with manufacturer’s instructions during 

system setup.

Vista Research, Inc. Evaluator: Ken Wilcox Associates

100 View St. Tel: (816) 443-2494

Mountain View, CA 94042 Date of Evaluation: 04/15/96

Tel: (650) 966-1171 
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

373

Revision Date: August 23, 1999

Vista Research, Inc.

Model LT-100a Monthly Monitoring Method

Version 1.0

LARGE DIAMETER PIPELINE LEAK DETECTOR

Certification: Leak rate of 0.2 gph at 50 psi with PD > 97% and PFA < 3%.

Leak Threshold: 0.148 gph. A pipeline system should not be declared tight if the test result indicates 

a loss that equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel, fuel oil #4, waste oil, solvents.

Specification: System tests fiberglass or steel piping.

Tests are conducted at operating pressure to a maximum of 200 psi.

Pipeline Capacity: Maximum of 3,400 gallons.

Waiting Time: None between delivery and testing.

None between dispensing and testing.

Test Period: Minimum of 2 hours after setup and after pipeline is fully isolated.

Test data are acquired and recorded by a microprocessor.

Calculations are automatically performed by the microprocessor.

System Features: System may be permanently installed on pipeline to perform monthly monitoring, or 

may be transported and set up to perform line tightness testing.

A single 2-hour test is required consisting of a 1-hour monitoring period at operating 

pressure, and a 1-hour monitoring period at atmospheric pressure.

Discrete test method.

Preset threshold.

Printed message and alarm activation if leak is declared.

Calibration: System must be calibrated in accordance with manufacturer’s instructions during 

system setup.

Vista Research, Inc. Evaluator: Ken Wilcox Associates

100 View St. Tel: (816) 443-2494

Mountain View, CA 94042 Date of Evaluation: 11/06/98

Tel: (650) 966-1171 
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

374

Revision Date: August 23, 1999

Vista Research, Inc.

Model LT-100a Line Tightness Method

Version 1.0

LARGE DIAMETER PIPELINE LEAK DETECTOR

Certification: Leak rate of 0.1 gph at 50 psi with PD = 97% and PFA = 3%.

Leak Threshold: 0.060 gph. A pipeline system should not be declared tight if the test result indicates 

a loss that equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel, fuel oil #4, waste oil, solvents.

Specification: System tests fiberglass or steel piping.

Tests are conducted at operating pressure to a maximum of 200 psi.

Pipeline Capacity: Maximum of 3,400 gallons.

Waiting Time: None between delivery and testing.

None between dispensing and testing.

Test Period: Minimum of 2 hours after setup and after pipeline is fully isolated.

Test data are acquired and recorded by a microprocessor.

Calculations are automatically performed by the microprocessor.

System Features: System may be permanently installed on pipeline to perform line tightness testing, 

or may be transported and set up to perform line tightness testing.

A single 2-hour test is required consisting of a 1-hour monitoring period at operating 

pressure, and a 1-hour monitoring period at atmospheric pressure.

Preset threshold.

Printed message and alarm activation if leak is declared.

Calibration: System must be calibrated in accordance with manufacturer’s instructions during 

system setup.

Vista Research, Inc. Evaluator: Ken Wilcox Associates

100 View St. Tel: (816) 443-2494

Mountain View, CA 94042 Date of Evaluation: 11/06/98

Tel: (650) 966-1171 
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

375

Revision Date: August 23, 1999

Vista Research, Inc.

Model LT-100a Monthly Monitoring Method

Version 1.0 Segmented Method

LARGE DIAMETER PIPELINE LEAK DETECTOR

Certification: Leak rate of 0.2 gph at 50 psi with PD > 97% and PFA < 3%.

Leak Threshold: 0.174 gph. A pipeline system should not be declared tight if the test result indicates 

a loss that equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel, fuel oil #4, waste oil, solvents.

Specification: System tests fiberglass or steel piping.

Tests are conducted at operating pressure to a maximum of 200 psi.

Pipeline Capacity: Maximum of 3,400 gallons.

Waiting Time: None between delivery and testing.

None between dispensing and testing.

Test Period: Minimum of 2 hours after setup and after pipeline is fully isolated.

Test data are acquired and recorded by a microprocessor.

Calculations are automatically performed by the microprocessor.

System Features: System may be permanently installed on pipeline to perform monthly monitoring, or 

may be transported and set up to perform line tightness testing.

A single 2-hour test is required consisting of two 5-minute monitoring segments at 

atmospheric pressure spaced 25 minutes apart, and two 5-minute monitoring 

segments at operating pressure spaced 25 minutes apart.

Discrete test method.

Preset threshold.

Printed message and alarm activation if leak is declared.

Calibration: System must be calibrated in accordance with manufacturer’s instructions during 

system setup.

Vista Research, Inc. Evaluator: Ken Wilcox Associates

100 View St. Tel: (816) 443-2494

Mountain View, CA 94042 Date of Evaluation: 11/06/98

Tel: (650) 966-1171 
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

376

Revision Date: August 23, 1999

Vista Research, Inc.

Model LT-100a Line Tightness Method

Version 1.0 Segmented Method

LARGE DIAMETER PIPELINE LEAK DETECTOR

Certification: Leak rate of 0.1 gph at 50 psi with PD = 97% and PFA = 3%.

Leak Threshold: 0.074 gph. A pipeline system should not be declared tight if the test result indicates 

a loss that equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel, fuel oil #4, waste oil, solvents.

Specification: System tests fiberglass or steel piping.

Tests are conducted at operating pressure to a maximum of 200 psi.

Pipeline Capacity: Maximum of 3,400 gallons.

Waiting Time: None between delivery and testing.

None between dispensing and testing.

Test Period: Minimum of 2 hours after setup and after pipeline is fully isolated.

Test data are acquired and recorded by a microprocessor.

Calculations are automatically performed by the microprocessor.

System Features: System may be permanently installed on pipeline to perform line lightness testing, 

or may be transported and set up to perform line tightness testing.

A single 2-hour test is required consisting of two 5-minute monitoring segments at 

atmospheric pressure spaced 25 minutes apart, and two 5-minute monitoring 

segments at operating pressure spaced 25 minutes apart.

Preset threshold.

Printed message and alarm activation if leak is declared.

Calibration: System must be calibrated in accordance with manufacturer’s instructions during 

system setup.

Vista Research, Inc. Evaluator: Ken Wilcox Associates

100 View St. Tel: (816) 443-2494

Mountain View, CA 94042 Date of Evaluation: 11/06/98

Tel: (650) 966-1171 
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

377

Revision Date: August 23, 1999

Vista Research, Inc.

Model LT-100a Hourly Monitoring Test

Version 2.0 Segmented Method

LARGE DIAMETER PIPELINE LEAK DETECTOR

Certification: Leak rate of 3.0 gph with PD = 95% and PFA < 0.1%.

Leak Threshold: 2.936 gph. A pipeline system should not be declared tight if the test result indicates 

a loss that equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel, fuel oil #4, waste oil, solvents.

Specification: System tests fiberglass or steel piping.

Tests are conducted at operating pressure to a maximum of 200 psi.

Pipeline Capacity: Maximum of 3,400 gallons.

Waiting Time: None between delivery and testing.

None between dispensing and testing.

Test Period: Minimum of 15 minutes after setup and after pipeline is fully isolated.

Test data are acquired and recorded by a microprocessor.

Calculations are automatically performed by the microprocessor.

System Features: System may be permanently installed on pipeline to perform hourly monitoring, or 

may be transported and set up to perform line tightness testing.

A single 15-minute test is required consisting of two 3-minute monitoring segments 

at atmospheric pressure spaced 0 minutes apart, and two 3-minute monitoring 

segments at operating pressure spaced 0 minutes apart.

Discrete test method.

Preset threshold.

Printed message and alarm activation if leak is declared.

Calibration: System must be calibrated in accordance with manufacturer’s instructions during 

system setup.

Vista Research, Inc. Evaluator: Ken Wilcox Associates

100 View St. Tel: (816) 443-2494

Mountain View, CA 94042 Date of Evaluation: 11/06/98

Tel: (650) 966-1171 
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

378

Revision Date: August 23, 1999

Vista Research, Inc.

Model LT-100a Monthly Monitoring Test

Version 2.0 Segmented Method

LARGE DIAMETER PIPELINE LEAK DETECTOR

Certification: Leak rate of 0.2 gph with PD = 95% and PFA = 2.9%.

Leak Threshold: 0.136 gph. A pipeline system should not be declared tight if the test result indicates 

a loss that equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel, fuel oil #4, waste oil, solvents.

Specification: System tests fiberglass or steel piping.

Tests are conducted at operating pressure to a maximum of 200 psi.

Pipeline Capacity: Maximum of 3,400 gallons.

Waiting Time: None between delivery and testing.

None between dispensing and testing.

Test Period: Minimum of 15 minutes after setup and after pipeline is fully isolated.

Test data are acquired and recorded by a microprocessor.

Calculations are automatically performed by the microprocessor.

System Features: System may be permanently installed on pipeline to perform monthly monitoring, or 

may be transported and set up to perform line tightness testing.

A single 15-minute test is required consisting of two 3-minute monitoring segments 

at atmospheric pressure spaced 0 minutes apart, and two 3-minute monitoring 

segments at operating pressure spaced 0 minutes apart.

Discrete Test Method.

Preset threshold.

Printed message and alarm activation if leak is declared.

Calibration: System must be calibrated in accordance with manufacturer’s instructions during 

system setup.

Vista Research, Inc. Evaluator: Ken Wilcox Associates

100 View St. Tel: (816) 443-2494

Mountain View, CA 94042 Date of Evaluation: 11/06/98

Tel: (650) 966-1171 
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

379

Revision Date: November 14, 1997

Warren Rogers Associates, Inc.

WRA Statistical Inventory Analysis, Version 5.1

STATISTICAL INVENTORY RECONCILIATION TEST METHOD (QUANTITATIVE)

Certification: Leak rate of 0.1 gph with PD = 99.98% and PFA = 0.02%.

Leak Threshold: 0.05 gph. A tank system should not be declared tight if the test result indicates a 

loss or gain that equals or exceeds this threshold.

Applicability: Gasoline, diesel, aviation fuel, fuel oil #4.

Tank Capacity: Maximum of 18,000 gallons. 

Data Requirement: Minimum of 30 days of product level and flow through data. 

Comments: Not evaluated using manifold tank systems.

Of 41 data sets submitted for evaluation, all were analyzed with conclusive results.

Median monthly throughput for tanks evaluated was 1000 gallons.

Leak rates of 0.05, 0.1, and 0.20 gph were used in evaluation.

A portion of data sets evaluated was supplied by vendor.

Warren Rogers Associates, Inc. Evaluator: Ken Wilcox Associates

747 Aquidneck Ave. Tel: (816) 443-2494

Middletown, RI 02840 Date of Evaluation: 12/18/90

Tel: (800) 972-7472
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

380

Revision Date: February 17,1998

Warren Rogers Associates, Inc.

WRA Statistical Inventory Analysis, Version 5.2

STATISTICAL INVENTORY RECONCILIATION TEST METHOD (QUANTITATIVE)

Certification: Leak rate of 0.1 gph with PD = 99.9% and PFA = 0.1%

Leak Threshold: 0.05 gph. A tank system should not be declared tight when there is a statistically 

significant loss at the 0.01 level of significance.

Applicability: Gasoline, diesel, aviation fuel, fuel oil #4

Tank Capacity: Maximum of 36,000 gallons for single tank.

Maximum of 36,000 gallons cumulative capacity for manifold tank systems with no 

more than 3 tanks in system.

Data Requirement: Minimum of 30 days of product level and flow through data.

Comments: 50% of data sets evaluated were from manifolded tanks systems.

82 data sets were submitted for evaluation. All were analyzed with conclusive 

results.

Median monthly throughput of tanks evaluated was 52,207 gallons.

Median monthly throughput of separate manifolded tank evaluation was 14,944 

gallons.

Leak rates of 0.05, 0.10, and 0.20 gph were used in evaluation.

All manifolded data sets evaluated were supplied by evaluator.

A portion of the data sets drawn from the WRA Statistical Inventory Analysis 

Version 5.1 evaluation for tanks that were not manifolded, were provided by the 

vendor.

Warren Rogers Associates, Inc. Evaluator: Ken Wilcox Associates

747 Aquidneck Ave. Tel : (816) 443-2494

Middletown, RI 02840 Date of Evaluation: 12/08/97

Tel: (401) 846-4747
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

381

Revision Date: August 23, 1999

Warrick Controls, Inc.

DMS-47X-X-X(-X), DMS-57X-X-X(-X) Monitoring Panels

Models DLP-1-NC, DLP-2-NC, DLP-2-NO Sensors

LIQUID-PHASE INTERSTITIAL DETECTOR

Detector:

Output type: qualitative

Sampling frequency: continuous

Operating principle: float switch

Test Results:

unleaded gasoline diesel fuel water

Detection time (sec) <1 <1 <1

Fall time (sec) <1 <1 <1

Threshold (in)* ≤1.54 ≤1.50 ≤1.43

 Precision (in)* ≤0.004 ≤0.005 ≤0.007

*Results for threshold and precision varied slightly for each sensor; see evaluation for details.

Comments:

Sensors are reuseable.

Warrick Controls, Inc. Evaluator: Ken Wilcox Associates, Inc.

4237 Normandy Court Tel: (816) 443-2494

Royal Oak, MI 48073 Date of Evaluation: 12/01/97

Tel: (248) 549-4900
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

382

Revision Date: August 23, 1999

Warrick Controls, Inc.

Model DFP-25 Sensor

LIQUID-PHASE INTERSTITIAL DETECTOR

Detector:

Output type: qualitative

Sampling frequency: continuous

Operating principle: product solubility

Test Results:

unleaded gasoline diesel fuel water

Detection time (hr:min:sec) 0:06:50 4:14:40 N/A

Fall time** N/A* N/A N/A

Lower detection limit (cm) ≤2.54 ≤2.54 N/A

* See glossary.

**Fall time is not applicable, since sensor must be replaced after activating.

Specificity Results:

Activated: Evaluator claims that this sensor will respond to any material that is capable of dissolving the 

hydrocarbon-sensitive wax.

Not Activated: Water.

Comments:

Sensor is activated when hydrocarbon-sensitive wax is dissolved, releasing a spring that activates an 

alarm.

Sensor is not reusable, and must be replaced after contact with hydrocarbons.

Liquid level was set at 1 inch (2.54 cm) during test.

Warrick Controls, Inc. Evaluator: Ken Wilcox Associates, Inc.

4237 Normandy Court Tel: (816) 443-2494

Royal Oak, MI 48073 Date of Evaluation: 11/18/96

Tel: (248) 549-4900
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

383
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

384

Revision Date: August 23, 1999

Warrick Controls, Inc.

Model 5700 Meter 

PVP-2 Sensor

VAPOR-PHASE OUT-OF-TANK PRODUCT DETECTOR

Detector:

Output type: quantitative

Sampling frequency: continuous

Operating principle: adsistor

Test Results:

unleaded gasoline synthetic gasoline JP-4 jet fuel

Accuracy (%) 25.4 -100.0 157.1

Bias (%) 14.4 -100.0 108.3

Precision (%) 7.6 N/D* 20.4

Detection time (min) >60 N/A* >60

Fall time (min) 38 N/A >60

Lower detection limit (ppm) 1353.3 N/D N/D

* See glossary.

Specificity Results:

Not Activated: n-hexane, toluene, xylene(s).

Warrick Controls, Inc. Evaluator: Carnegie Mellon Research Institute

4237 Normandy Court Tel: (412) 268-3495

Royal Oak, MI 48073 Date of Evaluation: 09/10/91

Tel: (248) 549-4900
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

385

Revision Date: August 23, 1999

Watson Systems, Inc. (formerly EnviroQuest Technologies Limited)

SIRAS Software System Versions 2.0, 2.8.3

STATISTICAL INVENTORY RECONCILIATION TEST METHOD (QUANTITATIVE)

Certification: Leak rate of 0.2 gph with PD = 99.999% and PFA = 0.01%

Leak rate of 0.1 gph with PD = 99.3% and PFA = 0.7%

Leak Threshold: 0.1 fo

0.05 

A tan

Applicability: Gasoline, diesel, aviation fuel, fuel oil #4.

Tank Capacity: Maximum of 30,000 gallons. 

Size limits using an acceptable protocol for manifold tank systems have not been 

determined.

Data Requirement: Minimum of 30 days of usable product level and flow through data.

System Features: Method of data analysis that system employs consists of a fully automated software 

package with embedded algorithms for conducting leak detection testing. However, 

backup technical support for the end user was part of the service feature of these 

SIR versions and was provided through contract with Watson Systems, Inc. Since 

these SIR versions are now owned by USTMAN Technologies, Inc., information, 

assistance, and technical support for these versions are at their discretion.

Comments: Not evaluated for in-house use that is independent of vendor participation.

Not evaluated for manifold tank systems using an acceptable protocol.

27% of data sets evaluated were from manifold tank systems.

Of 56 data sets submitted for evaluation, 6 were not analyzed due to unusable data.

Median monthly throughput for tanks evaluated was 73,518 gallons.

Leak rates ranging from 0.0458 to 0.2500 gph were used in evaluation.

Data sets evaluated were supplied by evaluator.

Former Owner: Evaluator: Midwest Research Institute

Watson Systems, Inc. Tel: (816) 753-7600

Current Owner: Date of Evaluation: 08/23/93

USTMAN Technologies, Inc.

12265 W. Bayaud Ave.

Lakewood, CO 80228

Tel: (800) 253-8054
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

386

Revision Date: November 6, 1997

Western Environmental Resources

Model PLT-100R

LINE TIGHTNESS TEST METHOD

Certification: Leak rate of 0.1 gph with PD = 100% and PFA = 0%. 

Leak Threshold: 0.05 gph. A pipeline system should not be declared tight if the test result indicates 

a loss that equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel, fuel oil, waste oil, solvents. 

Specification: System tests fiberglass and steel pipelines.

Tests are conducted at 150% operating pressure.

Mechanical line leak detector must be removed from pipeline for duration of test.

Pipeline Capacity: Maximum of 80 gallons.

Waiting Time: None between delivery and testing.

Minimum of 1 hour between dispensing and testing. 

Test Period: Minimum of 30 minutes.

Test data are acquired and recorded manually.

Two tests with no time between tests are required before a leak can be declared.

Calibration: System must be checked annually and calibrated if necessary in accordance with 

manufacturer's instructions.

Western Environmental Resources Evaluator: Vista Research

PO Box 37 Tel: (415) 966-1171

Bakersfield, CA 93302 Date of Evaluation: 11/21/90

Tel: (805) 326-0173
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

387

Revision Date: November 6, 1997

Western Environmental Resources

AES System II 

VOLUMETRIC TANK TIGHTNESS TEST METHOD (OVERFILL)

Certification: Leak rate of 0.1 gph with PD = 97.7% and PFA = 2.3%.

Leak Threshold: 0.05 gph. A tank system should not be declared tight if the test result indicates a 

loss or gain that equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel, fuel oil, waste oil, solvents.

Tank Capacity: Maximum of 15,000 gallons.

Tank must be minimum 100% full.

Waiting time: Between delivery and the beginning of test, waiting time is included in the waiting 

time after "topping off". 

Between "topping off" and beginning test, waiting time is computer-dictated by realtime analysis of level and temperature data.

Total waiting time is approximately 4 to 12 hours. 

There must be no dispensing or delivery during waiting time.

Test Period: Minimum of 2 hours (two 1-hour tests).

Test data are acquired and recorded by a computer. 

Leak rate is calculated from the last 1 hour, 30 minutes of test period data.

There must be no dispensing or delivery during test.

Temperature: Average for product is determined by a minimum of 5 temperature sensors.

Groundwater: Depth to groundwater in backfill must be determined. If groundwater is above bottom 

of tank, product level must be adjusted to provide a minimum net pressure of 2 psi at 

bottom of the tank during test.

Calibration: Level sensors must be calibrated before each test in accordance with manufacturer's 

instructions.

Temperature sensor must be checked annually and calibrated if necessary in 

accordance with manufacturer's instructions.

Comments: Not evaluated using manifold tank systems.

Western Environmental Resources Evaluator: Vista Research

PO Box 37 Tel: (415) 966-1171

Bakersfield, CA 93302 Date of Evaluation: 12/20/90

Tel: (805) 326-1073
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

388

Revision Date: November 6, 1997

Western Environmental Resources

AES System II

(Large Tanks)

VOLUMETRIC TANK TIGHTNESS TEST METHOD (OVERFILL)

Certification: Leak rate of 0.1 gph with PD = 98.9% and PFA = 1.1%. 

Leak Threshold: 0.05 gph. A tank system should not be declared tight if the test result indicates a 

loss or gain that equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel, fuel oil, waste oil, solvents.

Tank Capacity: Maximum of 75,000 gallons.

Tank must be minimum 100% full.

Waiting Time: Minimum of 24 hours after delivery.

Between "topping off" and beginning test, waiting time is computer-dictated by realtime analysis of level and temperature data and must be minimum of 1 hour.

There must be no dispensing or delivery during waiting time.

Test Period: Minimum of 4 hours. 

Test data are acquired and recorded by a computer. 

Leak rate is calculated from the last 3 hours of test period data.

There must be no dispensing or delivery during test.

Temperature: Average for product is determined by a minimum of 12 thermistors.

Groundwater: Depth to groundwater in backfill must be determined. If groundwater is above bottom 

of tank, product level must be adjusted to provide a minimum net pressure of 2 psi at 

bottom of the tank during test.

Calibration: Level sensors must be calibrated before each test in accordance with manufacturer's 

instructions.

Thermistors must be checked annually and calibrated if necessary in accordance 

with manufacturer's instructions.

Comments: Not evaluated using manifold tank systems.

Western Environmental Resources Evaluator: Ken Wilcox Associates

PO Box 37 Tel: (816) 443-2494

Bakersfield, CA 93302 Date of Evaluation: 02/28/92

Tel: (805) 326-0173
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

389

Revision Date: September 11, 1998

Xerxes Corp.

Xerxes Trucheck Hydrostatic Monitoring System

DOUBLE WALLED TANK TIGHTNESS TEST METHOD

Certification: Leak rate of 0.1 gph with PD = 99% and PFA = 1%.

Leak Threshold: 0.05 gph. A tank system should not be declared tight if the test result indicates a 

loss or gain that equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel, fuel oil #4.

Tank Capacity: Maximum of 30,000 gallons.

Tank must be between 0 to 100% full.

Waiting Time: None between delivery and testing.

Test Period: Minimum of 10 hours.

Groundwater: Depth to groundwater in backfill must be determined before and after test.

When groundwater level is above bottom of tank but below top, test should be 

repeated if groundwater level increases by more than 7 inches during test. 

When groundwater level is above tank, test should be repeated if groundwater level 

increases by more than 5 inches during test.

Xerxes Corp. Evaluator: Robert Plunkett, Ph.D.

7901 Xerxes Ave. Tel: (612) 338-0945

Minneapolis, MN 55431 Date of Evaluation: 01/07/93

Tel: (612) 887-1890
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

390

[THIS PAGE INTENTIONALLY LEFT BLANK]
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

391

PART III

LEAK DETECTION EQUIPMENT

 THIRD PARTY EVALUATIONS

 UNDER REVIEW

ALPHABETICAL BY VENDOR,

THEN BY TEST METHOD,

FINALLY BY EQUIPMENT MODEL
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

392

Revision Date: August 23, 

1999

Test Method Vendor Equipment Model Evaluator/Date of 

Evaluation

Automatic Tank Gauging 

Method

Centroid Products, Inc. Tankstik TKS 8000 System Midwest Research Institute

02/26/99

Bulk Field-Constructed Tank 

Leak Detection Method

Coggins Systems, Inc. Leak Manager and Remote 

Unit (RTU/8130)

Ken Wilcox Associates

11/24/98

Liquid-Phase Interstitial 

Detector

Containment Solutions, 

Inc.

FOVF 600B; FOVF 600S; 

FCBS 700; FDAS 710; FHRB 

810; DDAS 910; DCBS 900

Ken Wilcox Associates

06/11/99

Continuous in-tank Leak 

Detection Method

Emco Electronics, Tuthill 

Corp.

EECO System 2000 Series, 

EECO SLD for Single Tanks 

(0.2 gph)

Ken Wilcox Associates

10/16/96

Continuous in-tank Leak 

Detection Method

Emco Electronics, Tuthill 

Corp.

EECO System Series, EECO 

SLD for Manifolded Tanks 

(0.2 gph)

Ken Wilcox Associates

04/06/98

Bulk Field-Constructed Tank 

Leak Detection Method

Engineering Design 

Group, Inc.

EDG XLD 2000 Plus Ken Wilcox Associates

12/22/98

Bulk Field-Constructed Tank 

Leak Detection Method

Engineering Design 

Group, Inc.

MCG 8100 ATG Ken Wilcox Associates

07/10/97

Vapor-Phase Out-of-Tank 

Product Detector

HNU DL-101; HW-101; ISPI-101; 

PI-101

Carnegie Mellon Research 

Institute

11/28/91,02/05/92, 03/05/92

Continuous in-tank Leak 

Detection Method

Marley Pump Co. ST Series 1400-1800, FMS, 

ATG, LLM Series and 

ProLink

ADA Technologies, Inc.

11/17/98

Automatic Tank Gauging 

Method

Marley Pump Co. ST1400-1800 Series, 

Versions ATG, FMS and LLM

ADA Technologies, Inc.

10/12/92

Liquid-Phase Interstitial 

Detector

Mine Safety Appliances Tankgard and Tankgard VIII 

with Universal Reservoir 

Sensor

Carnegie Mellon Research 

Institute 

10/16/92

Vapor-Phase Out-of-Tank 

Product Detector

Mine Safety Appliances Tank-Check Carnegie Mellon Research 

Institute 

05/31/91

Continuous in-tank Leak 

Detection Method

NESCO (formerly Arizona 

Instrument Corp.)

Encompass CSTT -

Ultrasonic Probe Access 

Module

Ken Wilcox Associates

09/18/96

Non-Volumetric Tank 

Tightness Test Method 

(Vacuum)

Tanknology - NDE U3 Vacuum Ken Wilcox Associates

06/25/96
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

393

PART IV

ACCEPTABLE TEST PROTOCOLS

ALPHABETICAL BY TEST METHOD, 

THEN BY PROTOCOL DATE
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

394

Revision Date: August 23, 1999

Automatic Tank Gauging Method

“Standard Test Procedures for Evaluating Leak Detection Methods: Automatic Tank Gauging Systems”, 

EPA/530/UST-90/006, March 1990

 “Test Procedures for Comparison of Different ATGS Probes”, Ken Wilcox Associates, August 1999

Bulk Field-Constructed Tank Leak Detection Method

“Alternative Test Procedures for Evaluating Leak Detection Methods: Evaluation of Bulk Field-constructed 

Tanks”, Ken Wilcox Associates, February 1996

“Protocol for Certification of the ASTTest Mass Balance Leak Detection System”, ASTTest Systems Inc., May 

1997

Continuous In-Tank Leak Detection Method

“Evaluation Protocol for Continuous In-Tank Leak Detection Systems”, Midwest Research Institute, April 1995

Large Diameter Pipeline Leak Detector

“Modified Third-Party Testing Protocol for Large Pipeline Leak Detection”, EFA Technologies, Inc., August 1995

Liquid-Phase Out-of-Tank and Interstitial Product Detectors

“Standard Test Procedures for Evaluating Leak Detection Methods: Liquid-Phase Out-of-Tank Product 

Detectors”, EPA/530/UST-90/009, March 1990

“Development of Procedures to Assess the Performance of External Leak Detection Devices: Liquid-Phase 

ASTM-Formatted Methods - Revised Draft to Include JP-4 Jet Fuel”, Radian Corporation, 

June 29, 1990

“Test Procedures for Third Party Evaluation Of Leak Detection Methods: Cable Sensor Liquid Contact Leak 

Detection Systems”, Carnegie Mellon Research Institute, November 11, 1991

“Test Procedures for Third Party Evaluation of Leak Detection Methods: Point Sensor Liquid Contact Leak 

Detection Systems”, Carnegie Mellon Research Institute - Advanced Devices and Materials Group, November 

11, 1991

“Alternative Test Procedures for Evaluating Leak Detection Methods: Evaluation of Liquid Level Sensors,” Ken 

Wilcox Associates, Inc., September 1996. (Interstitial only.)

Non-Volumetric Tank Tightness Test Method

“Standard Test Procedures for Evaluating Leak Detection Methods: Non-Volumetric Tank Tightness Testing 

Methods”, EPA/530/UST-90/005, March 1990

Line Tightness Test Method

“Standard Test Procedures for Evaluating Leak Detection Methods: Pipeline Leak Detection Systems”, 

EPA/530/UST-90/010, September 1990

Pressure/Vacuum Interstitial Monitor

“Alternative Test Procedures for Evaluating Leak Detection Methods: Evaluation of Vacuum Interstitial Monitoring

Methods,” Ken Wilcox Associates, Inc., September 1996.
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

395

Revision Date: November 14, 1997

Statistical Inventory Reconciliation Test Method

“Standard Test Procedures for Evaluating Leak Detection Methods: Statistical Inventory Reconciliation 

Methods”, EPA/530/UST-90/007, June 1990

“Protocol for Determining Applicability of a SIR Method for Manifolded Tanks and Determining Size Limitation”, 

Developed under coordination by the SIR team of the National Work Group on Leak Detection Evaluations, 

November 1996

Vapor-Phase Out-of-Tank Product Detector

“Standard Test Procedures for Evaluating Leak Detection Methods: Vapor-Phase Out-of-Tank Product 

Detectors”, EPA/530/UST-90/008, March 1990

“Development of Procedures to Assess the Performance of External Leak Detection Devices: Vapor-Phase 

ASTM-Formatted Methods”, Radian Corporation, June 6, 1990

“Development of Procedures to Assess the Performance of External Leak Detection Devices: Vapor-Phase 

ASTM-Formatted Methods”, Radian Corporation, June 29, 1990

Volumetric Tank Tightness Test Method

“Standard Test Procedures for Evaluating Leak Detection Methods: Volumetric Tank Tightness Testing 

Methods”, EPA/530/UST-90/004, March 1990
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

396

[THIS PAGE INTENTIONALLY LEFT BLANK]
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

397

PART V

LEAK DETECTION EQUIPMENT

MAINTENANCE CHECKLISTS
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

398

[THIS PAGE INTENTIONALLY LEFT BLANK]
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

399

ATG MAINTENANCE CHECKLIST

Magnetostrictive and Ultrasonic Probes

Minimum procedures to be conducted by a qualified service technician.

Has all input wiring been inspected for proper entry and termination, 

including testing for ground faults? 

Yes No 

Have the probe and sensors been checked for visible damage such 

as residue buildup, cracks, or breaks? 1,2

Yes No 

Has the accuracy of the level sensor been tested? 3 Yes No 

Has the accuracy of the water sensor been tested? 4 Yes No 

Has the appropriateness of the high water level alarm setting been 

verified? 5

Yes No 

Are all alarms activated and functioning properly? Yes No 

Comments:

1. Damaged probes mu st be cleaned or replaced as appropriate. Probes used in heavier products such as waste oil 

should be checked more frequently. Heavier products can leave deposits on the probe shaft and float assemblies 

that may restrict the measurement capacity of the probe.

2. Because the magnetostrictive probe consists of moving parts, its sensors can be damaged by excessive frictional 

wear as well as residue build-up. Residue build-up can affect the weight of the sensor as well as inhibit its ability 

to slide freely along the guide tube. Inaccuracies in the product level measurements could indicate a problem with 

the probe sensors. For additional testing of the probe sensors, perform the following test:

a. Remove the probe from the tank and place it carefully on the ground.

b. Place the water sensor flush with the bottom of the probe shaft and place the product float near the 

middle of the probe shaft.

c. Check the height reading on the tank gauge monitor (after allowing sufficient time for the monitor to 

respond).

d. Measure the distance from the bottom of the probe to the bottom of the product float and compare it 

with the reading on the monitor.

3. To test the accuracy of the product sensor:

a. Using the tank console monitor, take an initial fuel level reading.

b. Dispense one gallon of product into a calibrated container.

c. Using the tank console monitor, take a second fuel level reading. 

d. Verify that the change in tank volume is one gallon.

4. To test the accuracy of the water sensor:

a. Remove probe from the tank.

b. By hand, move the water float up the probe to a point higher than the high-water alarm set point. 

c. The monitor should respond with a high water alarm report. (The water height may also appear on the 

tank monitor display console. 

d. Check this height against its actual location.

5. The high water level alarm should not be set so high that water ingress into the tank goes undetected for long 

periods of time.

Disclaimer: This checklist is not intended to tell the technician how to perform the maintenance and system check. 

Technicians should follow manufacturers’ detailed instructions while making sure that all of the items on this 

checklist have been covered.
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

400

[THIS PAGE INTENTIONALLY LEFT BLANK]
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

401

ATG MAINTENANCE CHECKLIST

Mass Buoyancy Probes

Minimum procedures to be conducted by a qualified service technician.

Has all input wiring been inspected for proper entry and termination, 

including testing for ground faults?

Yes No 

Has the probe been checked for visible damage (such as residue buildup 

or cracks)? 1

Yes No 

Has the battery been tested within the last 3 months? Yes No 

Has the accuracy of the product sensor been tested? 2 Yes No 

Has the accuracy of the water sensor been tested? 3 Yes No 

Has the appropriateness of high-water level alarm setting been verified? 4 Yes No 

Are all alarms activated and functioning properly? Yes No 

Comments:

1. Damaged probes must be cleaned or replaced, as appropriate. The mass displacement probe is very susceptible to 

dirt and residue build-up and should be checked semi-annually and cleaned, if necessary. Mass displacement 

probes used in viscous products such as waste oil should be checked more frequently. Products of this type can 

leave heavy deposits on the probe which may inhibit the accuracy of the probe. Checking a reconciliation report 

and/or manual sticking could verify the system's accuracy.

2. To test the accuracy of the product sensor:

a. Using the tank console monitor, take an initial fuel level reading.

b. Dispense one gallon of product into a calibrated container.

c. Using the tank console monitor, take a second fuel level reading. 

d. Verify that the change in tank volume is one gallon.

3. To test the accuracy of the water sensor: (Note: water sensor is separator from the mass buoyancy probe.)

a. Remove the probe from the tank.

b. By hand, move the water float up the probe to a point higher than the high water limit. 

c. The monitor should respond with a high water alarm. (The water height may also appear on the tank 

monitor display console.) 

d. Check this height against its actual location.

4. The high water level alarm should not be set so high that water ingress into the tank goes undetected for long 

periods of time.

Disclaimer: This checklist is not intended to tell the technician how to perform the maintenance and system check. 

Technicians should follow manufacturer’s detailed instructions while making sure that all of the items on this 

checklist have been covered.
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

402

[THIS PAGE INTENTIONALLY LEFT BLANK]
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

403

APPENDIX

GLOSSARY OF TERMS

Accuracy:

The degree to which the measured leak rate agrees with the induced leak rate on the average. If a system is 

accurate, it has a very small or zero bias.

Activated:

Refers to the state of a qualitative detector's response when indicating the presence of product.

Bias:

An indication of whether the device’s measured leak rate consistently overestimates (positive bias) or 

underestimates (negative bias) the actual induced leak rate.

Bulk Modulus (of Elasticity):

The ratio of hydrostatic pressure to the relative change it produces in volume.

Continuous Automatic Tank Gauging Method (Continuous ATGS):

These systems use an ATG probe to collect data continually and combine this with software to identify time 

intervals when there is no activity in the tank and the data are stable enough for analysis. An algorithm then 

combines data from a number of such periods until there is enough evidence to make a determination about 

the leak status of the tank. This type of system functions like an ATGS except that it does not require that 

the tank be taken out of service for a set period of several hours whenever a test is to be done. Instead, it 

uses data from shorter stable time periods and combines the results to estimate a leak rate and perform a 

test. The system may default to a standard or shut down ATG test (requiring the tank to be out of service for a 

few hours) at the end of the month if sufficient good quality have not been obtained over the month. These 

systems are designed to meet the monthly monitoring performance standard of detecting a leak of 0.20 gallon 

per hour or 150 gallons per month with 95% probability of detection and 5% probability of false alarm. They 

test the tank vessel itself.

Continuous Detector:

Detectors that operate continuously, are always present and are never turned off.

Continuous In-Tank Leak Detection Method (CITLDS):

These systems are designed to allow the tank to operate continuously or nearly continuously without 

interruption for leak detection tests. They typically have some sensors permanently installed in the tank, 

combined with a microprocessor in a console. In addition, they may be connected to the dispensing meters, 

allowing for automatic recording and use of dispensing data. There may also be a provision for direct input of 

data from a keyboard or pad, to allow for entry of delivery receipts.

Currently there are three types of such continuous systems that are reaching the market. These three types 

are referred to as “Continuous ATGS,” “Continual Reconciliation,” and “Automatic Monthly Inventory Control.”

Detection time:

The sum of rise time and lag time.

Fall time:

The elapsed time after a detector has responded to a test hydrocarbon and is removed and has recovered to 

95% of its original baseline level or there is no detectable signal output.

False Alarm:

Declaring a tank to be leaking when in fact it is tight.
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

404

GLOSSARY OF TERMS (Continued)

Groundwater:

Water table or water within the excavation around a tank.

Induced Leak Rate:

The actual leak rate, in gallons per hour (gph), used during the evaluation against which the results from a 

given test device will be compared.

Intermittent Detector:

Detectors that monitor on a regular basis. An intermittent detector may be a hand held device that is portable 

or a permanently installed device that is used to periodically test for the presence of product.

Lag Time:

The elapsed time from the detector's first contact with test product to the first detectable signal.

Leak threshold:

The measured leak rate at which the system detects the tank to be leaking. This leak rate will always be less 

than or equal to the leak rate requirement for the various release detection methods given in 40 CFR § 280 

Subpart D-Release Detection. (Please note that some states and other regulatory authorities may have 

different requirements). The minimum leak threshold for declaring a leak is experimentally determined from the 

results of the evaluation of the release detection system.

Manifolded tank systems:

Tanks connected by piping that allow the tank system to function as a single tank. A typical manifolded tank 

system usually consists of two tanks connected by a siphon tube that permits the product in the tanks to be 

at the same level while product is being pumped out of only 1 tank.

Measured Leak Rate:

A positive number in gallons per hour (gph), measured by test device that indicates the amount of product 

leaking out of the tank system. A negative number would indicate that something was being added to the 

tank. The performance of a system is based on how well the measured leak rate compares to the actual 

induced leak rate.

MER:

The Maximum Effective Range, the longest length of sensor cables and/or jumper cables that can be 

connected to form a leak detection network.

N/A:

Not Applicable

N/D:

Not Determined

N/R:

No Response

Net Pressure:

In this document this term refers to a pressure difference between the pressure in the tank and the pressure 

related to the groundwater. If the net pressure is positive, the pressure in the tank is greater than that due to 

groundwater. If net pressure is negative, the pressure in the tank is less than that due to groundwater.
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

405

GLOSSARY OF TERMS (Continued)

Nominal Leak Rate:

The set or target leak rate to be achieved as closely as possible during the evaluation of a leak detection 

system. It is a positive number expressed in gallons per hour (gph).

Precision:

The degree of agreement of repeated measurements of the same parameter. Precision estimates reflect 

random error and are not affected by bias.

Pressure:

In this document this term refers to a pressure which is at or above atmospheric. Any pressure reading at or 

above atmospheric is listed as positive; any pressure reading less than atmospheric (vacuum) is listed as 

negative.

Probability of Detection, P(D):

The probability of detecting a leak of a given size, usually expressed as a percentage.

Probability of False Alarm, P(FA):

The probability of declaring a tank to be leaking when it is tight, usually expressed as a percentage.

Probe:

A component of a detection system that must come into contact with product before product can be declared 

or measured.

Qualitative Responses:

The type of detector response that indicates only the presence or absence of product without determining the 

specific product concentration or thickness.

Quantitative Response:

A type of detector response that quantifies the concentration or thickness of product present.

Relative Accuracy:

A function of systematic error, or bias, and random error, or precision. Smaller values indicate better 

accuracy. See entry for “Accuracy.”

Resolution:

The smallest change in the quantity being measured which the measurement system is capable of detecting.

Response Time:

A general term that refers to the more specific terms of lag time, rise time, and fall time.

Rise Time:

The elapsed time from a detector's first detectable signal in response to the presence of product to an output 

that is 95% of full scale for a quantitative detector or activated for a qualitative detector.

Specificity:

Specificity applies to vapor and liquid sensors and lists products or components of products that these 

sensors can detect. Specificity for quantitative sensors is the ratio of sensor output, or measured 

concentration, to the actual concentration of hydrocarbon test gas expressed as a percentage. Specificity for 

qualitative sensors is reported as activated if the sensor responds within 24 hours. Otherwise, specificity is 

reported as inactivated.
Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment. Equipment should be installed and operated in accordance with all applicable laws and 

regulations.

406

GLOSSARY OF TERMS (Continued)

Total Pressure:

In this document this term equals the sum of the pressure in ullage space and the pressure due to product 

head.

Ullage:

The un-wetted portion of the tank, i.e. that portion of the tank not in contact with product.

Vacuum:

In this document this term refers to any pressure that is less than atmospheric.