ALABAMA

 DEPARTMENT OF ENVIRONMENTAL MANAGEMENT

ADEM

April 18, 1997

MEMORANDUM

TO: Vendors of Leak Detection Equipment/Procedures

FROM: Curt D. Johnson, Chairperson

RE: National Work Group on Leak Detection Evaluation’s List of Third-Party

Evaluated Leak Detection Equipment/Procedures

If you are reading this memo, you have received our latest edition of the list. We would appreciate any comments you 

have concerning the list. Please comment 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 my attention at the address on the 

following page. To enable the work group to properly review the third-party tests, three (3) copies of all applicable 

information indicated in the enclosed "Leak Detection Equipment Review - Document List" must be included. 

Since the 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 meet EPA performance 

standards. 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 list per company per location. 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.

Enclosure: Work Group Members, Work Group Teams, Leak Detection Equipment Review-

 Document List
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

Mike Kadri Michigan Department of Environmental 

Quality 

UST Division 

PO Box 30157 

Lansing, MI 48909-7657

(517) 335-7204 

Fax (517) 335-2245

funkhoup@deq.state.mi.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

russ.brauksieck@dec.mailnet.state.ny.us

David Wiley USEPA 

401 M St. Southwest 

5402G 

Washington, DC 20460 

(703) 603-7178

Fax (703) 603-9163

wiley.david@epamail.epa.gov

Lamar Bradley Tennessee Department of Environment and 

Conservation 

UST Division, 4th Floor L and C Tower 

401 Church St. 

Nashville, TN 37243-1541

(615) 532-0952 

(615) 532-0945 

Fax (615) 532-0938

lbradley2@mail.state.tn.us

Jeff Tobin State of Montana

Department of Environmental Quality

Box 200901

Helena, MT 59620-0901

(406) 444-1417 

Fax (406) 444-1902

jtobin@mt.gov

Ellen Van Duzee USEPA Idaho Operations 

1435 N. Orchard St. 

Boise, ID 83706-2239

(208) 378-5762 

Fax (208) 378-5744

vanduzee.ellen@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

sfarahna@ix.netcom.com

Bill Faggart USEPA

401 M St. Southwest

5402G

Washington, DC 20460

(703) 603-7151

Fax (703) 603-9163

faggart.billy@epamail.epa.gov
WORK GROUP TEAMS

TEAM LEADER MEMBERS

Automatic Tank Gauging (ATG) Systems

and 

Large Tank ATG Systems 

Ellen Van Duzee Russ Brauksieck

Beth DeHaas

Continuous In-Tank Leak Detection Systems Shahla Farahnak Mike Kadri

Bill Faggart

List Administration 

and 

Other Leak Detection Methods

Curt Johnson David Wiley

Non-Volumetric Tank Tightness Test Methods Shahla Farahnak Russ Brauksieck

Jeff Tobin

Pipeline Leak Detection Systems

and 

Large Pipeline Leak Detection Systems

Mike Kadri Shahla Farahnak 

Jeff Tobin

Statistical Inventory Reconciliation (SIR) Methods Lamar Bradley Mike Kadri

Bill Faggart

Vapor/Liquid Sensors for Interstitial/External 

Monitoring Methods

and 

Other Interstitial Monitoring Methods

David Wiley Mike Kadri

Volumetric Tank Tightness Test (VTTT) Methods

and 

Large Tank VTTT Methods 

Beth DeHaas Russ Brauksieck

 
 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 or test methods. 

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. 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/method. 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. Complete installation/operations manual for the equipment/method.

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

owner/local implementing agency.

 5. 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. 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.
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 or 

test method.

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

12. 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. Following documentation for the methods using tracer analysis:

a. Name and certification of the laboratory analyzing vapor samples.

b. Quality Assurance Manual of the laboratory.

c. Method and amount of tracer injection.

d. Vapor sample collection method and chain of custody records.

e. Third-party certification for capability of the test-method to detect leaks from

the ullage portion of the tank.
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)

Financial responsibility insurance/assurance agency

Leak Detection Vendor (manufacturer and/or service co.)

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 List of Leak Detection Evaluations 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 List of Leak Detection Evaluations 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 equipent installation

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

Inadequate field services (tank & 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
THIRD EDITION

SECOND PRINTING

LIST OF LEAK DETECTION EVALUATIONS FOR 

UNDERGROUND STORAGE TANK (UST) 

SYSTEMS

April 18, 1997
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 EQUIPMENT1

(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 5

AUTOMATIC TANK GAUGING SYSTEM 6

CONTINUOUS IN-TANK LEAK DETECTION SYSTEM 10

DOUBLE WALLED TANK TIGHTNESS TEST 11

LARGE DIAMETER PIPELINE LEAK ETECTOR 12

LARGE TANK AUTOMATIC TANK GAUGING SYSTEM 13

LINE TIGHTNESS TEST METHOD 14

LIQUID-PHASE INTERSTITIAL DETECTOR 15

LIQUID-PHASE OUT-OF-TANK PRODUCT DETECTOR 17

NON-VOLUMETRIC TANK TIGHTNESS TEST METHOD (TRACER) 19

NON-VOLUMETRIC TANK TIGHTNESS TEST METHOD (ULLAGE) 20

NON-VOLUMETRIC TANK TIGHTNESS TEST METHOD (VACUUM) 21

PRESSURE/VACUUM INTERSTITIAL MONITOR 22

STATISTICAL INVENTORY RECONCILIATION TEST METHOD (QUALITATIVE) 23

STATISTICAL INVENTORY RECONCILIATION TEST METHOD (QUANTITATIVE) 24

VAPOR-PHASE OUT-OF-TANK PRODUCT DETECTOR 25

VOLUMETRIC TANK TIGHTNESS TEST METHOD (OVERFILL) 26

VOLUMETRIC TANK TIGHTNESS TEST METHOD (OVERFILL) (Edison Lab Protocol) 27

VOLUMETRIC TANK TIGHTNESS TEST METHOD (UNDERFILL) 28
ii

TABLE OF CONTENTS

PART II - LEAK DETECTION EQUIPMENT SPECIFICATIONS 29

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

and finally by leak rate.)

Absolute Precision Testing Systems 30

Advanced Tank Technology, Inc. 31

Agar Corp. 32

Alert Technologies, Inc. 33

Andover Controls Corp. 37

Arizona Instrument Corp. 40

Armstrong Monitoring Corporation 45

Beaudreau Electronics, Inc. 47

Bell Avon, Inc. 49

Brooks KWK, Inc. 50

Caldwell Systems Corporation 52

Campo/Miller, Inc. 54

Computerizing, Inc. 60

Control Engineers 61

EBW, Inc. 65

EFA Technologies, Inc. 70

Egemin Naamloze Vennootschap 71

Emco Electronics, Tuthill Corp. 73

Engineered Systems, Inc. 83

Entropy Limited 84

Environment and Safety 86

Environmental Fuel Systems, Inc. 87

FCI Environmental, Inc. 88

FDR Services, Inc. 92

FE Petro, Inc. 93

Hasstech 114
iii

Heath Consultants, Inc. 123

TABLE OF CONTENTS

Horner Creative Products 126

Ibex Industries 136

IMO Industries Inc., Gems Sensors Division 137

INCON Intelligent Controls, Inc. 138

Keekor Environmental Products 152

Leak Detection Systems, Inc 153

Mallory Controls 154

Marley Pump Co. 157

Mine Safety Appliances 170

NDE Environmental Corp. 172

Omntec/Electro Levels Mfg., Inc. 179

One Plus Corp. 182

Patriot Sensors and Controls Corp. (formerly MagneTek) 183

PermAlert 187

Petro Vend, Inc. 194

Pneumercator Company, Inc. 204

ProTank, Inc. 206

Raychem Corp. 213

Ronan Engineering Co. 214

Schuster Instruments 218

Simmons Sirvey Corp. 219

S.I.R. International, Inc. 221

SIR Monitor (formerly Environmental Management Technologies) 222

Sir Phoenix, Inc. 223

Soiltest, Inc. 224

Syscorp, Inc. 225
iv
v

TABLE OF CONTENTS

Tank Automation, Inc. 226

Tanknology Corp. International 227

Tidel Engineering, Inc. 229

Tokheim Corp. 248

Tracer Research Corp. 249

Triangle Environmental, Inc. 252

Universal Sensors and Devices, Inc. 256

USTest 261

USTMAN Industries, Inc. 266

Vaporless Manufacturing 269

Veeder-Root 273

Vista Research, Inc. 299

Warren Rogers Associates, Inc. 305

Warrick Controls, Inc. 306

Watson Systems, Inc. (formerly EnviroQuest Technologies Limited) 308

Western Environmental Resources 311

Xerxes Corp. 314
vi

TABLE OF CONTENTS

 

PART III - LEAK DETECTION EQUIPMENT THIRD PARTY EVALUATION UNDER REVIEW 316

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

PART IV - ACCEPTABLE TEST PROTOCOLS 317

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

PART V - LEAK DETECTION EQUIPMENT MAINTENANCE CHECKLIST 321

APPENDIX A - GLOSSARY OF TERMS 327 

[THIS PAGE INTENTIONALLY LEFT BLANK] 
1

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

performance of the method or equipment.

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

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

performance of the method or equipment.

Revision Date: April 18, 1997

AUTOMATIC ELECTRONIC LINE LEAK DETECTOR

VENDOR EQUIPMENT NAME

LEAK RATE/THRESHOLD/

MAX VOLUME

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

Campo/Miller, Inc. LS300-120 and LS300-120 XLC 3 gph/2.36 gph/35.36 gallons

Campo/Miller, Inc. LS300-120 PLUS and LS300-120 PLUS A/S 3 gph/2.36 gph/35.36 gallons

Campo/Miller, Inc. LS300-120 PLUS, AL; LS300-120 PLUS, AL, A/S and LS300-120 

PLUS AL, LSI

3 gph/1.5 gph/163 gallons

Campo/Miller, Inc. LS300-120 PLUS, AL; LS300-120 PLUS, AL, A/S and LS300-120 

PLUS AL,LSI

0.2 gph/0.1 gph/163 gallons

Campo/Miller, Inc. LS300-120 PLUS, AL; LS300-120 PLUS, AL, A/S and 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

Control Engineers Line Leak Detector 

Model LLP2

0.1 gph/0.05 gph/89 gallons

Emco Electronics, Tuthill 

Corp.

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

Emco Electronics, Tuthill 

Corp.

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

Emco Electronics, Tuthill 

Corp.

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

Emco Electronics, Tuthill 

Corp.

EECO System LLD

 (for Flexible Pipelines)

3.0 gph/2.0 gph/49.6 gallons

Emco Electronics, Tuthill 

Corp.

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/128 gallons

Gilbarco Environmental 

Products

Environmental Management Console (EMC)

with Line Leak Detector, Series PA02630000501

0.2 gph/0.1 gph/128 gallons

Gilbarco Environmental 

Products

Environmental Management Console (EMC)

with Line Leak Detector, Series PA02630000501

0.1 gph/0.079 gph/128 gallons

Gilbarco Environmental 

Products

Environmental Management Console (EMC)

with Line Leak Detector, Series PA02630000501

(for Flexible Pipelines)

3.0 gph/1.5 gph/158.4 gallons

Gilbarco Environmental 

Products

Environmental Management Console (EMC)

with Line Leak Detector, Series PA02630000501

(for Flexible Pipelines)

0.2 gph/0.1 gph/158.4 gallons

Gilbarco Environmental 

Products

Environmental Management Console (EMC)

with Line Leak Detector, Series PA02630000501

(for Flexible Pipelines)

0.1 gph/0.079 gph/158.4 gallons
3

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

performance of the method or equipment.

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

Hasstech LineTite Pipeline Leak Monitor 0.1 gph/0.062 gph/341 gallons
4

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

performance of the method or equipment.

Revision Date: April 18, 1997

AUTOMATIC ELECTRONIC LINE LEAK DETECTOR (CONTINUED)

VENDOR EQUIPMENT NAME

LEAK RATE/THRESHOLD/

MAX VOLUME

Hasstech LineTite Pipeline Leak Monitor 

(for Flexible Pipelines)

3.0 gph/2.0 gph/49.6 gallons

Hasstech LineTite Pipeline Leak Monitor 

(for Flexible Pipelines)

0.1 gph/0.062 gph/49.6 gallons

INCON Intelligent Controls, 

Inc.

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

INCON Intelligent Controls, 

Inc.

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

INCON Intelligent Controls, 

Inc.

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

INCON Intelligent Controls, 

Inc.

TS-LLD Line Leak Detector 

(for Flexible Pipelines)

3 gph/1.5 gph/49.6 gallons

INCON Intelligent Controls, 

Inc.

TS-LLD Line Leak Detector 

(for Flexible Pipelines)

0.2 gph/0.1 gph/49.6 gallons

INCON Intelligent Controls, 

Inc.

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, RLM 10000, ST 1401L, and 

ST1801L

3.0 gph/2.0 gph/55.1 gallons

Marley Pump Co. Red Jacket PPM 4000, RLM 9000, RLM 10000, ST 1401L, and 

ST1801L

0.2 gph/0.1 gph/55.1 gallons

Marley Pump Co. Red Jacket PPM 4000, RLM 9000, RLM 10000, ST 1401L, and 

ST1801L

0.1 gph/0.047 gph/55.1 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 Engineering Co. 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 Pr obe and Submersible Pump Controller 

3.0 gph/2.0 gph/129 gallons

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

Line Integrity Probe and Submersible Pump Controller 

0.1 gph/0.06 gph/129 gallons

Veeder-Root Pressurized Line Leak Detector, Series 8494 3.0 gph/2.5 gph/100 gallons

Veeder-Root Pressurized Line Leak Detector, Series 8494 0.2 gph/0.17 gph/100 gallons

Veeder-Root Pressurized Line Leak Detector, Series 8494 0.1 gph/0.09 gph/100 gallons

Veeder-Root TLS Line Leak Detector, Series 8484 3.0 gph/1.88 gph/89 gallons

Veeder-Root TLS Line Leak Detector, Series 8484 0.1 gph/0.05 gph/89 gallons
5

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

performance of the method or equipment.

Veeder-Root TLS-350 Line Leak Detector , Series 8475 0.1 gph/0.079 gph/128 gallons

Veeder-Root TLS-350 Line Leak Detector for Flexible Pipelines, Series 8475 3.0 gph/1.5 gph/158.4 gallons

Veeder-Root TLS-350 Line Leak Detector for Flexible Pipelines, Series 8475 0.2 gph/0.1 gph/158.4 gallons
6

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

performance of the method or equipment.

Revision Date: April 18, 1997

AUTOMATIC ELECTRONIC LINE LEAK DETECTOR (CONTINUED)

VENDOR EQUIPMENT NAME

LEAK RATE/THRESHOLD/

MAX VOLUME

Veeder-Root TLS-350 Line Leak Detector for Flexible Pipelines, Series 8475 0.1 gph/0.079 gph/158.4 gallons

Veeder-Root TLS-350 Line Leak Detector, Series 8475 3.0 gph/1.5 gph/128 gallons

Veeder-Root TLS-350 Line Leak Detector, Series 8475 0.2 gph/0.1 gph/128 gallons
7

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

performance of the method or equipment.

Revision Date: April 18, 1997

AUTOMATIC MECHANICAL LINE LEAK DETECTOR

VENDOR EQUIPMENT NAME

LEAK RATE/THRESHOLD/

MAX VOLUME

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

FE Petro, Inc. STP-MLD-D Pipeline Leak Detector 3.0 gph/2.0 gph/341 gallons

FE Petro, Inc. 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 and XLD 3.0 gph/2.0 gph/129 gallons

Marley Pump Co. Red Jacket FX1/FX2 3.0 gph/2.0 gph/158 gallons

Marley Pump Co. Red Jacket FX1/FX2 Flexline 

(for Flexible Pipelines)

3.0 gph/2.0 gph/49 gallons

Marley Pump Co. Red Jacket FX2/FX2-D and Bigflo 3.0 gph/2.0 gph/362 gallons

Marley Pump Co. Red Jacket XLP 3.0 gph/2.0 gph/129 gallons

Marley Pump Co. Red Jacket XLP 

(for Flexible Pipelines)

3.0 gph/2.0 gph/48.9 gallons

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

Vaporless Manufacturing Vaporless LD 2000 and LD 2000S 3.0 gph/1.7 gph/129 gallons

Vaporless Manufacturing Vaporless LD 2000E and LD 2000E-S 3.0 gph/2.0 gph/59.6 gallons

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

Vaporless Manufacturing Vaporless LD 3000 and LD 3000S 3.0 gph/2.0 gph/320 gallons
8

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

performance of the method or equipment.

Revision Date: April 18, 1997

AUTOMATIC TANK GAUGING SYSTEM

VENDOR EQUIPMENT NAME

LEAK RATE/THRESHOLD/

MAX VOLUME

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 CX9000, CX9200, and CMX240

(Magnetostrictive Probe)

0.1 gph/0.05 gph/15,000 gallons

Andover Controls Corp. Andover Infinity

CX9000, CX9200, and CMX240

(Magnetostrictive Probe)

0.2 gph/0.1 gph/15,000 gallons

Andover Controls Corp. Versions AC8+/AC256+ 

(Magnetostrictive Probe)

0.2 gph/0.1 gph/15,000 gallons

Arizona Instrument Corp. Encompass MTS IPAM #17-903

(Magnetostrictive Probe #17-9300)

0.2 gph/0.1 gph/15,000 gallons

Arizona Instrument Corp. Encompass USF IPAM #17-901

(Ultrasonic Probe #17-9100)

0.2 gph/0.1 gph/15,000 gallons

Caldwell Systems 

Corporation

Tank Manager

(Ultrasonic Probe)

0.2 gph/0.1 gph/20,000 gallons

Caldwell Systems 

Corporation

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

Control Engineers 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 and Auto-Stik Jr.

(Magnetostrictive Probe)

0.2 gph/0.1 gph/15,000 gallons

EBW, INC. Auto-Stik II and 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

Egemin Naamloze 

Vennootschap

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

(Magnetostrictive Probe)

0.2 gph/0.1 gph/15,000 gallons

Emco Electronics, Tuthill 

Corp.

EECO System TLM/0.1 gph Precision Test

(Magnetostrictive Probe)

0.1 gph/0.05 gph/15,000 gallons

Emco Electronics, Tuthill 

Corp.

EECO System TLM/0.2 gph Quick Test

(Magnetostrictive Probe)

0.2 gph/0.1 gph/15,000 gallons

Emco Electronics, Tuthill 

Corp.

EECO System TLM/0.1 gph Quick Test

(Magnetostrictive Probe)

0.1 gph/0.05 gph/15,000 gallons
9

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

performance of the method or equipment.

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
10

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

performance of the method or equipment.

Revision Date: April 18, 1997

AUTOMATIC TANK GAUGING SYSTEM (CONTINUED)

VENDOR EQUIPMENT NAME

LEAK RATE/THRESHOLD/

MAX VOLUME

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 Monitor 2, 3, 2.1, and 3.1, PAO238000XXXX 

(Capacitance Probe) 

0.2 gph/0.1 gph/15,000 gallons

Gilbarco Environmental 

Products

EMC Environmental Management Console, EMC Basic Monitoring 

System Tank Monitor 2.1,3.1,PAO264XXX0000 

(Capacitance Probe)

0.2 gph/0.126 gph/15,000 gallons

Gilbarco Environmental 

Products

EMC Environmental Management Console, EMC Basic Monitoring 

System Tank Monitor 2.1, 3.1, PAO264XXX0000 

(Capacitance Probe)

0.1 gph/0.071 gph/15,000 gallons

Gilbarco Environmental 

Products

EMC Environmental Management Console, EMC Basic Monitoring 

System Tank Monitor 2.1, 3.1, PAO265XXX0000 

(Magnetostrictive Probe)

0.2 gph/0.093 gph/15,000 gallons

Gilbarco Environmental 

Products

EMC Environmental Management Console, EMC Basic Monitoring 

System Tank Monitor 2.1, 3.1, PAO265XXX0000 

(Magnetostrictive Probe)

0.1 gph/0.071 gph/15,000 gallons

Hasstech Tank Compliance Center, Model 700

(7100 Series Magnetostrictive Probe)

0.2 gph/0.1 gph/15,000 gallons

Hasstech Tank Compliance Center, Model 700

(7100 Series Magnetostrictive Probe)

0.1 gph/0.05 gph/15,000 gallons

INCON Intelligent Controls, 

Inc.

TS 1000 

(Magnetostrictive Probe)

0.2 gph/0.1 gph/15,000 gallons

INCON Intelligent Controls, 

Inc.

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. Red Jacket ATM System, 

Version RLM 5000, 5001, and 9000

(Magnetostrictive Probe)

0.2 gph/0.1 gph/15,000 gallons

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)

0.2 gph/0.1 gph/18,000 gallons

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)

0.1 gph/0.05 gph/18,000 gallons

Omntec/Electro Levels 

Mfg., Inc.

OEL 8000 

(Magnetostrictive Probe)

0.2 gph/0.1 gph/15,000 gallons
11

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

performance of the method or equipment.

Omntec/Electro Levels 

Mfg., Inc.

OEL 8000 

(Magnetostrictive Probe)

0.1 gph/0.05 gph/15,000 gallons
12

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

performance of the method or equipment.

Revision Date: April 18, 1997

AUTOMATIC TANK GAUGING SYSTEM (CONTINUED)

VENDOR EQUIPMENT NAME

LEAK RATE/THRESHOLD/

MAX VOLUME

Patriot Sensors and 

Controls Corp. 

(formerly MagneTek)

7021 Digital Tank Gauge

(7030 Series Magnetostrictive Probe)

0.2 gph/0.1 gph/15,000 gallons

Patriot Sensors and 

Controls Corp. (formerly 

MagneTek)

7021 Digital Tank Gauge

(7030 Series Magnetostrictive Probe)

0.1 gph/0.05 gph/15,000 gallons

Patriot Sensors and 

Controls Corp. (formerly 

MagneTek)

7021 Digital Tank Gauge

(7100 Series Magnetostrictive Probe)

0.2 gph/0.1 gph/15,000 gallons

Patriot Sensors and 

Controls Corp. (formerly 

MagneTek)

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

Petro Vend, Inc. Site Sentinel Model II and III, 

(Model 613, 2 inch, Magnetostrictive Probe)

0.2 gph/0.1 gph/15,000 gallons

Petro Vend, Inc. Site Sentinel Model II and III, 

(Model 613, 4 inch, Magnetostrictive Probe)

0.2 gph/0.1 gph/15,000 gallons

Petro Vend, Inc. Site Sentinel Model II and III, 

(Model 613, 4 inch, Magnetostrictive Probe)

0.1 gph/0.06 gph/15,000 gallons

Ronan Engineering Co. X-76 ETM and X-76 ETM-4X

(Magnetostrictive Probe)

0.2 gph/0.1 gph/15,000 gallons

Ronan Engineering Co. X-76 ETM and X-76 ETM-4X

(Magnetostrictive Probe)

0.1 gph/0.05 gph/15,000 gallons

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 Engineering, Inc. Tidel Environmental Monitoring System, EMS 2000, 3000, and 3500 

Series

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

0.2 gph/0.1 gph/15,000 gallons

Tidel Engineering, Inc. Tidel Environmental Monitoring System, EMS 2000, 3000, and 3500 

Series

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

0.2 gph/0.1 gph/15,000 gallons

Tidel Engineering, Inc. Tidel Environmental Monitoring System, EMS 4000

(Ultrasonic Probe #312-9000)

0.2 gph/0.1 gph/15,000 gallons

Tidel Engineering, Inc. Tidel Environmental Monitoring System, EMS 4000

(Ultrasonic Probe #312-9000)

0.1 gph/0.05 gph/15,000 gallons

Tidel Engineering, Inc. Tidel Environmental Monitoring System, EMS 4000

(Ultrasonic Probe #312-9001)

0.2 gph/0.1 gph/15,000 gallons

Tidel Engineering, Inc. Tidel Environmental Monitoring System, EMS 4000

(Ultrasonic Probe #312-9001)

0.1 gph/0.05 gph/15,000 gallons
13

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

performance of the method or equipment.

Universal Sensors and 

Devices, Inc.

TICS-1000

(Magnetostrictive Probe)

0.2 gph/0.1 gph/15,000 gallons
14

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

performance of the method or equipment.

Revision Date: April 18, 1997

AUTOMATIC TANK GAUGING SYSTEM (CONTINUED)

VENDOR EQUIPMENT NAME

LEAK RATE/THRESHOLD/

MAX VOLUME

USTest UST 2001

(Ultrasonic Probe)

0.1 gph/0.05 gph/15,000 gallons

USTest UST 2001 (Quick Test) 

(Ultrasonic Probe)

0.2 gph/0.1 gph/15,000 gallons

Veeder-Root TLS-200/200i/300/400 UST ATGS 

(7842 Digital Sensing Capacitance Probe)

0.2 gph/0.1 gph/15,000 gallons

Veeder-Root TLS-200/200i/300/400 UST ATGS 

(8472 Digital Sensing Capacitance Probe)

0.2 gph/0.126 gph/15,000 gallons

Veeder-Root TLS-200/200i/300/400 UST ATGS 

(8472 Digital Sensing Capacitance Probe)

0.1 gph/0.071 gph/15,000 gallons

Veeder-Root TLS-200/200i/250/250i/300/350/400 UST ATGS 

(8473 Digital Sensing Magnetostrictive Probe)

0.2 gph/0.093 gph/15,000 gallons

Veeder-Root TLS-200/200i/250/250i/300/350/400 UST ATGS 

(8473 Digital Sensing Magnetostrictive Probe)

0.1 gph/0.071 gph/15,000 gallons
15

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

performance of the method or equipment.

Revision Date: April 18, 1997

CONTINUOUS IN-TANK LEAK DETECTION SYSTEM

VENDOR EQUIPMENT NAME

LEAK RATE/THRESHOLD/

MAX VOLUME

Veeder-Root TLS Series 300/400 Monitoring Systems

with CSLD versions 8473 and 8493 

(Magnetostrictive Probes)

0.2 gph/0.16 gph/38,170 gallons
16

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

performance of the method or equipment.

Revision Date: April 18, 1997

DOUBLE WALLED TANK TIGHTNESS TEST

VENDOR EQUIPMENT NAME

LEAK RATE/THRESHOLD/

MAX VOLUME

Fluid Containment, Inc.

(formerly O/C Tanks Corp.)

Hydrostatic Precision Tank Test for DWT-Type II Tanks 0.1 gph/0.05 gph/30,000 gallons

Xerxes Corp. Xerxes Trucheck Hydrostatic Monitoring System 0.1 gph/0.05 gph/30,000 gallons
17

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

performance of the method or equipment.

Revision Date: April 18, 1997

LARGE DIAMETER PIPELINE LEAK DETECTOR

VENDOR EQUIPMENT NAME

LEAK RATE/THRESHOLD/

MAX VOLUME

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

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

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

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

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

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

Vista Research, Inc. Model LT-100 Version 1.0 Segmented Method 0.1 gph/0.074 gph/3,400 gallons
18

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

performance of the method or equipment.

Revision Date: April 18, 1997

LARGE TANK AUTOMATIC TANK GAUGING SYSTEM

VENDOR EQUIPMENT NAME

LEAK RATE/THRESHOLD/

MAX VOLUME

Universal Sensors and 

Devices, Inc.

LTC-1000

(Mass Buoyancy Probe)

1.4 gph/0.7 gph/2,000,000 gallons

Universal Sensors and 

Devices, Inc.

LTC-2000

(Differential Pressure Probe)

3.0 gph/1.5 gph/2,000,000 gallons
19

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

performance of the method or equipment.

Revision Date: April 18, 1997

LINE TIGHTNESS TEST METHOD

VENDOR EQUIPMENT NAME

LEAK RATE/THRESHOLD/

MAX VOLUME

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

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

NDE Environmental Corp. Proline Test Series III, Version 1.0 0.1 gph/0.05 gph/41 gallons

NDE Environmental Corp. PTK-88 0.1 gph/0.05 gph/40 gallons

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

ProTank, Inc. LTP-5000 Line Tester 0.1 gph/0.05 gph/41 gallons

Tanknology Corp. 

International

TLD-1 0.1 gph/0.05 gph/50 gallons

Tracer Research Corp. Tracer Tight Line Test 0.1 gph/A leak is declared when 

tracer chemical is detected outside 

of the pipeline.

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
20

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

performance of the method or equipment.

Revision Date: April 18, 1997

LIQUID-PHASE INTERSTITIAL DETECTOR

VENDOR EQUIPMENT NAME OPERATING PRINCIPLE

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

Beaudreau Electronics Model 404 Pump Cut-Off float switch

Beaudreau Electronics Model 406 Pump Cut-Off refractive index of liquids

EBW, Inc. AUTO-STIK Discriminating Sensors

LS-5, LS-35

float switch and product permeability

EBW, Inc. Liquid Sensor System

LS-3A, LS-30A, LS-7

float switch

Emco Electronics, Tuthill 

Corp.

EECO system, Leak Sensor II, Leak Sensor Jr. Thermistor and 

Proximity probes

thermal conductivity, proximity 

switch

Gilbarco Environmental 

Products

PA02590XXX000 float switch

Gilbarco Environmental 

Products

PA02591144000 float switch

Gilbarco Environmental 

Products

PA02592000000 float switch

INCON Intelligent Controls, 

Inc.

Tank Sentinel TS-1000EFI TSP-DIS BriteSensor opto-electric

INCON Intelligent Controls, 

Inc.

Tank Sentinel TS-1000EFI TSP-HIS Brite Sensor magnetic switch

INCON Intelligent Controls, 

Inc.

Tank Sentinel TS-1000/TS-2000

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

opto-electric

INCON Intelligent Controls, 

Inc.

Tank Sentinel TS-1000/TS-2000

TSP-HLS Standard Sensor, TSP-ULS Standard Sensor

magnetic switch

Marley Pump Co. Red Jacket PPM 4000 with Optical Liquid Discrimination Sensor optical sensor

Omntec/Electro Levels 

Mfg., Inc.

L-LL-R-1, LS-ASC, PDS-ASC, PDWS-1, PDWF-1 all: refractive index of liquids; PDSASC, PDWS-1, and PDWF-1: 

electrical conductivity

PermAlert PAL-AT Models AT20C, AT50C, AT40K

PHL Hydrocarbon Sensor

electrical conductivity

PermAlert TankWatch Models PHM10, PHMS

Combination Hydrocarbon/Water Probe

electrical conductivity

PermAlert TankWatch Models PHM10, PHMS

Hydrocarbon Probe

electrical conductivity

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

Liquid Sensor

thermal conductivity
21

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

performance of the method or equipment.

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

Universal Reservoir Sensor

float switch

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

Universal Sump Sensor

float switch
22

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

performance of the method or equipment.

Revision Date: April 18, 1997

LIQUID-PHASE INTERSTITIAL DETECTOR (Continued)

VENDOR EQUIPMENT NAME OPERATING PRINCIPLE

Pneumercator Company, 

Inc.

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

LS600AB, LS600LDBN, LS610, RSU800

float switch

Pneumercator Company, 

Inc.

LDE 700, LDE 740, LDE 9000

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

capacitance

Tidel Engineering, Inc. EMS-3500

with Liquid Discriminatory Probes Part 301-0635

electrical conductivity/hydrocarbon 

sensitive polymer

Tidel Engineering, Inc. EMS-3500

with Containment Sump Probes Part 301-0642

magnetic switch/float and 

hydrocarbon sensitive polymer

Tidel Engineering, Inc. EMS-3500

Tidel Detector No. 301-0752-001

float switch

Universal Sensors and 

Devices, Inc.

Leak Alert System Models LAL-100, LA-01, LA-02, LA-04, LA-X4, 

LA-08, CATLAS 

Liquid Sensor LALS-1

thermal conductivity

Veeder-Root TLS-250, TLS 250i Plus, ILS 250, ILS 350, TLS-350 

Interstitial Liquid Sensor for Steel Tanks (0794390-420)

float switch

Veeder-Root TLS-250i, TLS 250i Plus, ILS 250, ILS 350, TLS-350 

Interstitial Liquid Sensor for Fiberglass Tanks (0794390-401) 

float switch

Veeder-Root TLS-250i, TLS 250i Plus, ILS 250, ILS 350, TLS-350

Liquid Sensor for Sumps (0794390-206) 

float switch

Veeder-Root TLS-350 Discriminating Insterstitial Liquid Sensor capacitance change/ultrasonic

Veeder-Root TLS-350

Dispenser Pan Sensor(794380-320) and Containment Sump 

Sensor(794380-350)

electrical conductivity/ultrasonic

Veeder-Root TLS-350

Dual and Single Stage Hydrostatic Sensors

float switch

Veeder-Root TLS-350

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

Sensor (794380-208), Micro Sensor (794380-340)

product permeable/ultrasonic/float 

switch

Warrick Controls, Inc. Model DFP-25 Sensor product solubility
23

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

performance of the method or equipment.

Revision Date: April 18, 1997

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

ALERTMASTER 5100

Leak Detection Cable AMC-5007

electrical conductivity

Armstrong Monitoring 

Corporation

ALERTMASTER 5100

Vapor Sensor AMC F4000

metal oxide semiconductor

Brooks KWK, Inc. Leak Detection Systems,

KW-140 / KW-240 Monitors with Type 1 Sensor

product soluble

Brooks KWK, Inc. Leak Detection Systems,

KW-140 / KW-240 Monitors with Type 2 Sensor

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 fiber optic chemical sensor

FCI Environmental, Inc. Digital Hydrocarbon Probe DHP-100 fiber optic chemical sensor

Gilbarco Environmental 

Products

Environmental Management Console (EMC)

Groundwater Sensor, series PA02700XX0001

electrical conductivity

IMO Industries Inc., Gems 

Sensors Division

Gems Smartwell Portable Monitor model WPM-535

with Groundwater Probe model WP-535

conductive polymer

INCON Intelligent Controls, 

Inc.

Tank Sentinel TS-1000EFI

TSP-DDS BriteSensor, TSP-DTS BriteSensor

magnetic switch, float, and 

hydrocarbon sensitive polymer

INCON Intelligent Controls, 

Inc.

Tank Sentinel TS-1000EFI

TSP-MWS BriteSensor Groundwater Probe

hydrocarbon sensitive polymer

Mallory Controls Pollulert Probes MD221G/T, MD221G/TRA electrical conductivity

Mallory Controls Pollulert Probes 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

impedance change

PermAlert PAL-AT Models AT20C, AT50C, AT40K

TFH Hydrocarbon Sensor Cable

impedance change

PermAlert PAL-AT Models AT20C, AT50C, AT40K

with PHFW Hydrocarbon Probe and Type 1 Sensor

product soluble

PermAlert PAL-AT Models AT20C, AT50C, AT40K

with PHFW Hydrocarbon Probe and Type 2 Sensor

product soluble

Petro Vend, Inc. SiteSentinel 

30-3206, -3207, -3210 Sensors

product permeable
24

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

performance of the method or equipment.

Raychem Corp. TraceTek Alarm and Locator Modules 

TT502 Fuel Sensing Cable 

electrical conductivity

Tidel Engineering, Inc. EMS-3500

with Monitoring Well Probes Part 301-0641

conductivity via resistor ladder 

network
25

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

performance of the method or equipment.

Revision Date: April 18, 1997

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

VENDOR EQUIPMENT NAME OPERATING PRINCIPLE

Tidel Engineering, Inc. EMS-3500

with Sheen Probes Part 301-0687

electrical conductivity/hydrocarbon 

sensitive polymer

Tidel Engineering, Inc. EMS-3500

Tidel Detector No. 301-0762

electrical conductivity/hydrocarbon 

sensitive polymer

Tidel Engineering, Inc. Tidel Detector No. 301-0324-001 and 301-0325-001 electrical conductivity

Tidel Engineering, Inc. Tidel Detector No. 301-0326-001 and 301-0326-002 electrical conductivity

Veeder-Root 350 Series UST Monitoring Systems: Models ILS-350, TLS-350, 

TLS-350R

Groundwater Sensor (794380-621, -622, -624)

electrical conductivity
26

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

performance of the method or equipment.

Revision Date: April 18, 1997

NON-VOLUMETRIC TANK TIGHTNESS TEST METHOD (TRACER)

VENDOR EQUIPMENT NAME LEAK RATE/THRESHOLD

Tracer Research Corp. Tracer Tight 0.1 gph/A leak is declared when 

tracer chemical is detected outside 

of the tank.
27

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

performance of the method or equipment.

Revision Date: April 18, 1997

NON-VOLUMETRIC TANK TIGHTNESS TEST METHOD (ULLAGE)

VENDOR EQUIPMENT NAME LEAK RATE/THRESHOLD/

MAX VOLUME

Alert Technologies, Inc. Alert Ullage System Model 1050 

(Pressure and Vacuum Test)

0.1 gph/ A leak is declared when 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 Technologies, Inc. Alert Ullage System Model 1050 X (Vacuum Test) 0.1 gph/ A leak is declared when the 

ratio of the ultrasonic signal (when the 

tank is under vacuum) to the 

background signal (prior to vacuation) 

equals or exceeds 1.5 for either 12 

kHz or 25 kHz frequency band. 

/24,000 gallons

NDE Environmental Corp. U3 Ullage Test 

(Vacuum or Pressure Test)

0.1 gph/A leak is declared when the 

acoustic signal detected is different 

from the baseline. (Baseline is the 

acoustic signal before tank is 

pressurized or evacuated.)/16,500 

gallons

NDE Environmental Corp. UST Ullage Test - Version U2 (Pressure Test) 0.1 gph/A leak is declared when the 

pressure decay trend equals or 

exceeds ± 0.016 psi/hr./10,260 gallons

NDE Environmental Corp. UTS-4T Ullage Test (Pressure Test) 0.1 gph/A leak is declared when the 

make-up gas flow rate into ullage 

equals or exceeds 0.275 cubic 

feet/hour./7,500 gallons

ProTank, Inc. UTA-5000 Ullage Tester 

(Vacuum or Pressure Test)

0.1 gph/A leak is declared when the 

acoustic signal detected is different 

from the baseline. (Baseline is the 

acoustic signal before tank is 

pressurized or evacuated.)/16,500 

gallons.

ProTank, Inc. UTF-5000 Ullage Tester

(Pressure Test)

0.1 gph/A leak is declared when the 

make-up gas flowrate into ullage 

equals or exceeds 0.275 cubic feet 

per hour./7,500 gallons

ProTank, Inc. UTFP-5000 Ullage Tester 

(Pressure Test)

0.1 gph/A leak is declared when the 

pressure decay trend equals or 

exceeds ± 0.016 psi/hr./10,260 

gallons.

Triangle Environmental, 

Inc.

TEI Ullage Test, Version 1.0 (Vacuum Test) 0.1 gph/A leak is declared 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 UST 2000/U 

(Pressure and Vacuum Test) 

0.1 gph/A leak is declared when there 

is a substantial increase in the 

acoustic noise signal (when the tank is 
28

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

performance of the method or equipment.

under vacuum or pressure) above the 

background signal (prior to 

pressurization or evacuation) in the 

frequency interval of 10 kHz to 20 

kHz/7,550 gallons (pressure), 5,250 

gallons (vacuum). 
29

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

performance of the method or equipment.

Revision Date: April 18, 1997

NON-VOLUMETRIC TANK TIGHTNESS TEST METHOD (VACUUM)

VENDOR EQUIPMENT NAME

LEAK RATE/THRESHOLD/

MAX VOLUME

Horner Creative Products EZY 3 0.1 gph/ A leak is declared 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 leak is also declared if any water 

ingress is detected. /50,000 gallons

Tanknology Corp. 

International

VacuTect 0.1 gph/ A leak is declared 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 leak is declared 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
30

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

performance of the method or equipment.

Revision Date: April 18, 1997

PRESSURE/VACUUM INTERSTITIAL MONITOR

VENDOR EQUIPMENT NAME

LEAK RATE/THRESHOLD/

MAX VOLUME

Bell Avon, Inc. VIGILANT Leak Detection System 0.1 gph/ A leak is declared when 

changes in interstitial vacuum 

exceed a predetermined change in 

slope versus time curve./15,000 

gallons
31

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

performance of the method or equipment.

Revision Date: April 18, 1997

STATISTICAL INVENTORY RECONCILIATION TEST METHOD (QUALITATIVE)

VENDOR EQUIPMENT NAME

LEAK RATE/THRESHOLD/

MAX VOLUME

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

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

Horner Creative Products 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
32

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

performance of the method or equipment.

Revision Date: April 18, 1997

STATISTICAL INVENTORY RECONCILIATION TEST METHOD (QUANTITATIVE)

VENDOR EQUIPMENT NAME

LEAK RATE/THRESHOLD/

MAX VOLUME

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

Entropy Limited Precision Tank Inventory Control System Rev. 90 0.1 gph/0.05 gph/21,000 gallons

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

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

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

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

Simmons Sirvey Corp. SIR 5.7 LM 0.1 gph/0.05 gph/45,000 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

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

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

Warren Rogers 

Associates, Inc.

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

Watson Systems, Inc. 

(formerly EnviroQuest 

Technologies Limited)

Enviro Tite SIR 

(also known as SIRAS 99.6)

0.1 gph/0.05 gph/18,000 gallons

Watson Systems, Inc. 

(formerly EnviroQuest 

Technologies Limited)

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

Watson Systems, Inc. 

(formerly EnviroQuest 

Technologies Limited)

SIRAS Software System, Version 2.8.3 0.2 gph/0.1 gph/30,000 gallons
33

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

performance of the method or equipment.

Revision Date: April 18, 1997

VAPOR-PHASE OUT-OF-TANK PRODUCT DETECTOR

VENDOR EQUIPMENT NAME OPERATING PRINCIPLE

Arizona Instrument Corp. Soil Sentry Twelve-X metal oxide semiconductor

Arizona Instrument Corp. Soil Sentry Twelve-X metal oxide semiconductor

Environmental Fuel 

Systems, Inc.

Fuel Finder Version IV adsorption sampling

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

FCI Environmental, Inc. 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 VIII

P/N 488803 S/N 00389

metal oxide semiconductor

Mine Safety Appliances Tankgard

P/N 481532 S/N 03095

metal oxide semiconductor

Petro Vend, Inc. Petrosentry TLD III metal oxide semiconductor

Petro Vend, Inc. SiteSentinel 

Smart Module and Vapor Sensor

metal oxide semiconductor

Tidel Engineering, Inc. EMS-3000

301-0328-001, 301-0330-001

adsistor

Tidel Engineering, Inc. 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 LAL-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 

Adsistor Vapor Probes

adsistor

Warrick Controls, Inc. Model 5700 Meter 

PVP-2 Sensor

adsistor
34

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

performance of the method or equipment.

Revision Date: April 18, 1997

VOLUMETRIC TANK TIGHTNESS TEST METHOD (OVERFILL)

VENDOR EQUIPMENT NAME

LEAK RATE/THRESHOLD/

MAX VOLUME

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

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

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

Horner Creative Products 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

Western Environmental

Resources

AES System II - (Large Tanks) 0.1 gph/0.05 gph/75,000 gallons
35

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

performance of the method or equipment.

Revision Date: April 18, 1997

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

VENDOR EQUIPMENT NAME

LEAK RATE/THRESHOLD/

MAX VOLUME

Hasstech Leak Computer Tank Test System 0.1 gph/0.05 gph/12,000 gallons
36

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

performance of the method or equipment.

Revision Date: April 18, 1997

VOLUMETRIC TANK TIGHTNESS TEST METHOD (UNDERFILL)

VENDOR EQUIPMENT NAME

LEAK RATE/THRESHOLD/

MAX VOLUME

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

NDE Environmental Corp. Computerized VPLT Testing System 0.1 gph/0.05 gph/18,000 gallons

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

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

ProTank, Inc. VUP-5000 Underfill Tester 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 UST 2000/LL 0.1 gph/0.05 gph/15,000 gallons

USTest UST 2000/P 0.1 gph/0.05 gph/45,000 gallons
37

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

performance of the method or equipment.

PART II

 LEAK DETECTION EQUIPMENT

SPECIFICATIONS

 ALPHABETICAL BY COMPANY,

 THEN BY TEST METHOD,

 NEXT BY EQUIPMENT MODEL,

 FINALLY BY LEAK RATE 
38

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

performance of the method or equipment.

Revision Date: April 18, 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 leak is declared if the output of the measurement system equals or 

exceeds this threshold. 

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

Tel: (800) 355-2780 Date of Evaluation: 12/05/95
39

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

performance of the method or equipment.

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 synthetic

gasoline gasoline

Accuracy (%) 100 (above 23 ppm) 100 (above 8 ppm)

Detection time (min:sec) <00:01 <00:01

Fall time (min:sec) N/A* N/A

Lower detection limit (cm) <0.32 <0.32

*See glossary.

Specificity Results:

Activated: unleaded gasoline, synthetic gasoline, n-hexane, diesel fuel, jet-A fuel, JP-4 jet fuel, toluene, 

xylene(s).

Manufacturer’s specifications: LTD develops color in alcohols, ketones, solvents, and PCBs as well as 

petroleum products.

Comments: EPA and many states require detection of 1/8 inch (0.32 cm) of product for groundwater monitoring. 

Detector is not reusable, and must be replaced after contact with hydrocarbons.

Detector 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

Tel: (817) 831-3246 Date of Evaluation: 02/02/93
40

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

performance of the method or equipment.

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 synthetic 

gasoline gasoline

Accuracy (%) 100 100

Detection time (min:sec) <00:01 <00:01

Fall time (min:sec) <00:01 <00:01

Lower detection limits (cm)

 "Standard" setting 0.16 0.32

 "Sensitive" setting 0.03 0.03

Specificity Results:

Activated: unleaded gasoline, synthetic gasoline, 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: 

EPA and many states require detection of 1/8 inch (0.32 cm) of product for groundwater monitoring. 

Detector is 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.

P.O. Box 802127 Tel: (816) 443-2494

Houston, TX 77280-2127

Tel: (713) 464-4451 Date of Evaluation: 11/15/91
41

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

performance of the method or equipment.

Revision Date: April 18, 1997

Alert Technologies, Inc.

Alert Model 2000 In-Tank Mass Measurement Probe System

(Mass Buoyancy Probe)

AUTOMATIC TANK GAUGING SYSTEM

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 leak is declared if the output of the measurement system equals or exceeds

this threshold.

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

2000-X model (which was certified for use on tanks up to 30,000 gal capacity) and 2000-XB 

model (which was certified for use on tanks up 72,948 gallons) are still under review.

Alert Technologies, Inc. Evaluator: Midwest Research Institute
42

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

performance of the method or equipment.

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

Rolling Meadows, IL 60008

Tel: (708) 392-0060 Date of Evaluation: 03/11/91
43

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

performance of the method or equipment.

Revision Date: April 18, 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 leak is declared when 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, and 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.

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 underfilled 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

Tel: (708) 392-0060 Date of Evaluation: 03/15/92
44

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

performance of the method or equipment.

Revision Date: April 18, 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 leak is declared when 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, and 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.

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 underfilled 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

Tel: (708) 392-0060 Date of Evaluation: 02/28/94
45

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

performance of the method or equipment.

Revision Date: April 18, 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 leak is declared if the output of the measurement system equals or exceeds

this threshold. 

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

Tel: (708) 392-0060 Date of Evaluation: 02/28/94
46

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

performance of the method or equipment.

Revision Date: April 18, 1997

Andover Controls Corp.

Andover Infinity

CX9000, CX9200, and CMX240

(Magnetostrictive Probe)

AUTOMATIC TANK GAUGING SYSTEM

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

Leak Threshold: 0.1 gph. A leak is declared if the output of the measurement system equals or exceeds

this threshold. 

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

Tel: (508) 470-0555 Date of Evaluation: 05/24/93
47

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

performance of the method or equipment.

Revision Date: April 18, 1997

Andover Controls Corp.

Andover Infinity CX9000, CX9200, and CMX240

(Magnetostrictive Probe)

AUTOMATIC TANK GAUGING SYSTEM

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

Leak Threshold: 0.05 gph. A leak is declared if the output of the measurement system equals or exceeds

this threshold.

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

Tel: (508) 470-0555 Date of Evaluation: 05/24/93
48

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performance of the method or equipment.

Revision Date: April 18, 1997

Andover Controls Corp.

Versions AC8+/AC256+ 

(Magnetostrictive Probe)

AUTOMATIC TANK GAUGING SYSTEM

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

Leak Threshold: 0.1 gph. A leak is declared if the output of the measurement system equals or exceeds

this threshold.

Applicability: Gasoline, diesel, aviation fuel, fuel oil, and 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

Tel: (508) 470-0555 Date of Evaluation: 02/03/92
49

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performance of the method or equipment.

Revision Date: April 18, 1997

Arizona Instrument Corp.

Encompass MTS IPAM #17-903

(Magnetostrictive Probe #17-9300)

AUTOMATIC TANK GAUGING SYSTEM

Certification: Leak rate of 0.2 gph with PD = 97.80% and PFA = 2.2%.

Leak Threshold: 0.1 gph. A leak is declared if the output of the measurement system equals or exceeds

this threshold.

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

Arizona Instrument Corp. Evaluator: Ken Wilcox Associates

4114 E. Wood St. Tel: (816) 443-2494

Phoenix, AZ 85040-1941

Tel: (800) 528-7411 Date of Evaluation: 08/22/94
50

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performance of the method or equipment.

Revision Date: April 18, 1997

Arizona Instrument Corp.

Encompass USF IPAM #17-901

(Ultrasonic Probe #17-9100)

AUTOMATIC TANK GAUGING SYSTEM

Certification: Leak rate of 0.2 gph with PD = 99.94% and PFA = 2.06%.

Leak Threshold: 0.1 gph. A leak is declared if the output of the measurement system equals or exceeds

this threshold.

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

Arizona Instrument Corp. Evaluator: Ken Wilcox Associates

4114 E. Wood St. Tel: (816) 443-2494

Phoenix, AZ 85040-1941

Tel: (800) 528-7411 Date of Evaluation: 08/22/94
51

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performance of the method or equipment.

Revision Date: April 18, 1997

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

Accuracy (%) 100 100 N/D** N/D

Detection time (min:sec) 00:03 00:03 N/D N/D

Fall time (hr:min:sec) 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:

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

 

*Only 17-143A was tested with toluene.

Comments:

EPA and many states require detection of 1/8 inch (0.32 cm) of product for groundwater 

monitoring. 

Detectors are listed as interstitial due to intended use. 

Test procedures used were a combination of EPA's "Standard Test Procedures for Evaluating 

Leak Detection Methods: Liquid-Phase Out-of-Tank Product Detectors," March 1990, and EPA's 

"Standard Test Procedures for Evaluating Leak Detection Methods: Nonvolumetric Tank Tightness 

Testing Methods," March 1990. 

Detector is 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.

Arizona Instrument Corp. Evaluator: Ken Wilcox Associates

4114 E. Wood St. Tel: (816) 443-2494

Phoenix, AZ 85040-1941

Tel: (800)528-7411 Dates of Evaluation: 12/29/92 and 01/08/93
52

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performance of the method or equipment.

Revision Date: April 18, 1997

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 JP-4 JP-5

gasoline gasoline jet fuel jet fuel

Accuracy* (%) 170 120 120 N/D***

Bias* (%) 60 8.0 1.8 N/D

Precision* (%) 6.3 7.7 18 N/D

Detection time (min:sec) 12:20 12:27 12:33 N/D

Fall time* (min:sec) 11:53 11:53 11:55 N/D

Lower detection limit (ppm) 150 140 60 92**

* For tests conducted with 1000 ppm of test gas.

** Testing was done using a JP-5 jet fuel concentration of 90 ppm in humidified air.

*** See glossary.

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.

Comments:

Test procedures used were Radian Corporation's draft report "Development of 

Procedures to Assess the Performance of External Leak Detection Devices: Vapor-Phase 

ASTM-Formatted Methods," June 29, 1990. 

Please note that the following specification sheet is a separate evaluation for this same system.

Arizona Instrument Corp. Evaluator: Radian Corp.

4114 E. Wood St. Tel: (512) 454-4797

Phoenix, AZ 85040-1941 

Tel: (800)528-7411 Dates of Evaluation: 12/28/90 and 04/17/91
53

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performance of the method or equipment.

Revision Date: April 18, 1997

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:

diesel fuel * JP-8 jet fuel*

Accuracy (%) N/D** N/D

Bias -20 ppm @ 50 ppm N/D

Precision 12 ppm N/D

Detection time (min) 15 15

Fall time (min) 15 15

Lower detection limit 10 ppm <0.01 gal/hr

* A limited number of tests were conducted to determine the response of the system to diesel and JP-8 jet fuel.

** See glossary.

Specificity Results:

Activated: diesel fuel, JP-8 jet fuel.

Manufacturer’s specifications:

Calibration is recommended on an annual basis, or whenever the sensor or the main printed circuit board is 

replaced.

Comments:

Test procedures used were modified by evaluator from EPA's "Standard Test Procedures for Evaluation Leak 

Detection Methods: Vapor-Phase Out-of-Tank Product Detectors," March 1990, and Radian 

Corporation's draft report "Development of Procedures to Assess the Performance of External Leak 

Detection Devices: Vapor-Phase ASTM-Formatted Methods," June 6, 1990. 

Please note that the previous specification sheet is a separate evaluation for this same system.

Arizona Instrument Corp. Evaluator: Ken Wilcox Associates

4114 E. Wood St. Tel: (816) 443-2494

Phoenix, AZ 85040-1941

Tel: (800)528-7411 Date of Evaluation: 02/16/92
54

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performance of the method or equipment.

Revision Date: April 18, 1997

Armstrong Monitoring Corporation

ALERTMASTER 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

Accuracy (%) 100

Detection time (min:sec) 00:35

Fall time (min:sec) 02:30

Lower detection limit (cm) 0.04

*For tests conducted with 0.32 cm of floating product.

Specificity Results:

Activated: unleaded gasoline.

Manufacturer’s specifications:

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

Comments: 

EPA and many states require detection of 1/8 inch (0.32 cm) of product for groundwater monitoring. 

Detector is reusable.

Armstrong Monitoring Corporation Evaluator: Environment Canada

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

Nepean, Ontario, Canada K2E 7K3

Tel: (613) 225-9531 Date of Evaluation: 12/03/92
55

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performance of the method or equipment.

Revision Date: April 18, 1997

Armstrong Monitoring Corporation

ALERTMASTER 5100

Vapor Sensor AMC F4000

LIQUID-PHASE OUT-OF-TANK PRODUCT DETECTOR

Detector:

Output type: qualitative

Sampling frequency: continuous

Operating principle: metal oxide semiconductor

Test Results:

benzene

Accuracy (%) 100

Detection time (min:sec) 00:10

Fall time (min:sec) 04:02

Lower detection limit (ppm) 300

Specificity Results:

Activated: benzene.

Comments: 

Detector is reusable.

Armstrong Monitoring Corporation Evaluator: Environment Canada

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

Nepean, Ontario, Canada K2E 7K3

Tel: (613) 225-9531 Date of Evaluation: 12/03/92
56

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performance of the method or equipment.

Revision Date: April 18, 1997

Beaudreau Electronics, Inc.

Model 404 Pump Cut-Off

LIQUID-PHASE INTERSTITIAL DETECTOR

Detector:

Output type: qualitative

Sampling frequency: continuous

Operating principle: float switch

Test Results:

unleaded

gasoline water diesel fuel

Accuracy (%)

Detection time (min:sec) <00:01 <00:01 <00:01

Fall time (hr:min:sec) manual reset manual reset manual reset

Precision (in.) 0.0124 0.0067 0.0167

Lower detection limit (in) 0.89 0.68 0.72

Specificity Results:

Activated: unleaded gasoline, diesel fuel, water.

Manufacturer and evaluator claim sensor will respond to any liquid.

Manufacturer’s Specifications:

Manufacturer states that system requires no calibration.

Comments:

Test procedures used were "Alternative Test Procedures for Evaluation of Leak Detection Methods: Evaluation of 

Liquid Level Sensors,” September 1996, by Ken Wilcox Associates.

Detector is reusable, but must be manually reset after activating. 

Beaudreau Electronics, Inc. Evaluator: Ken Wilcox Associates

23 Industrial Drive Tel: (816) 443-2494

Waterford, CT 06285-9715

Tel: (203)443-6570 Date of Evaluation: 07/20/94
57

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

performance of the method or equipment.

Revision Date: April 18, 1997

Beaudreau Electronics, Inc.

Model 406 Pump Cut-Off

LIQUID-PHASE INTERSTITIAL DETECTOR

Detector:

Output type: qualitative

Sampling frequency: continuous

Operating principle: refractive index of liquids

Test Results:

unleaded

gasoline water diesel fuel

Accuracy (%) 100 100 100

Detection time (min:sec) <00:01 <00:01 <00:01

Fall time (hr:min:sec) manual reset manual reset manual reset

Precision (std. dev.) 0.003474 0.005329 0.001923

Lower detection limit (in) 0.357 0.369 0.321

Probability of detection (%) 100 100 100

Probability of false alarm (%) 0 0 0

Specificity Results:

Activated: unleaded gasoline, diesel fuel, water.

Manufacturer and evaluator claim sensor will respond to any liquid.

Manufacturer’s Specifications:

Manufacturer states that system requires no calibration.

Comments:

Test procedures used were modified by evaluator from EPA’s "Standard Test Procedures for Evaluation of Leak 

Detection Methods: Evaluation of Liquid Level Sensors, Liquid-Phase Out-of-Tank Product Detectors,” March 

1990.

Detector is reusable, but must be cleaned after activating in order to reset.

Beaudreau Electronics, Inc. Evaluator: Ken Wilcox Associates

23 Industrial Drive Tel: (816) 443-2494

Waterford, CT 06285-9715

Tel: (203)443-6570 Date of Evaluation: 07/20/94
58

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performance of the method or equipment.

Revision Date: April 18, 1997

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: A leak is declared when changes in interstitial vacuum exceed a predetermined

change in slope versus time curve.

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

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.

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 vacuum is analyzed continuously by a microprocessor to determine rate of 

change.

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

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

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

Baseline characteristics of tank behavior must be determined during setup of the 

system.

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

Groundwater may be above bottom of rigid tank.

Test procedures used were modified by evaluator from EPA’s “Standard Test

Procedures for Evaluating Leak Detection Methods: Nonvolumetric Tank Tightness 

Testing Methods,” March 1990.

Bell Avon, Inc. Evaluator: Ken Wilcox Associates

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

Picayune, MS 39466-5427

Tel: (601) 799-1217 Date of Evaluation: 11/16/95
59

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performance of the method or equipment.

Revision Date: April 18, 1997

Brooks KWK, Inc.

Leak Detection Systems,

KW-140 / KW-240 Monitors with Type 1 Sensor

LIQUID-PHASE OUT-OF-TANK PRODUCT DETECTOR

Detector:

Output type: qualitative

Sampling frequency: continuous

Operating principle: product soluble

Test Results:

unleaded synthetic

gasoline gasoline

Accuracy (%) 100 100

Detection time (min:sec) 00:24 00:09

Fall time (min:sec) N/A* N/A

Lower detection limit (cm) 0.01 0.01

* See glossary.

Specificity Results:

Activated: unleaded gasoline, synthetic gasoline, 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.

Comments:

EPA and many states require detection of 1/8 inch (0.32 cm) of product for groundwater monitoring. 

Detector is 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

Tel: (717) 724-6448 Date of Evaluation: 07/29/91
60

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performance of the method or equipment.

Revision Date: April 18, 1997

Brooks KWK, Inc.

Leak Detection Systems,

KW-140 / KW-240 Monitors with Type 2 Sensor

LIQUID-PHASE OUT-OF-TANK PRODUCT DETECTOR

Detector:

Output type: qualitative

Sampling frequency: continuous

Operating principle: product soluble

Test Results:

unleaded synthetic

gasoline gasoline

Accuracy (%) 100 100

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

Fall time (min:sec) N/A* N/A

Lower detection limit (cm) 0.01 0.01

* See glossary.

Specificity Results:

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

Manufacturer’s specifications:

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:

EPA and many states require detection of 1/8 inch (0.32 cm) of product for groundwater monitoring.

Detector is 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

Tel: (717) 724-6448 Date of Evaluation: 07/29/91
61

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performance of the method or equipment.

Revision Date: April 18, 1997

Caldwell Systems Corporation

Tank Manager

(Ultrasonic Probe)

AUTOMATIC TANK GAUGING SYSTEM

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

Leak Threshold: 0.10 gph. A leak is declared if the output of the measurement system equals or exceeds

this threshold.

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

1200 Diamond Circle, Unit K Tel: (816) 443-2494

Lafayette, CO 80026

Tel: (303) 604-6180 Date of Evaluation: 04/22/96
62

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performance of the method or equipment.

Revision Date: April 18, 1997

Caldwell Systems Corporation

Tank Manager

(Ultrasonic Probe)

AUTOMATIC TANK GAUGING SYSTEM

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

Leak Threshold: 0.05 gph. A leak is declared if the output of the measurement system equals or exceeds

this threshold.

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

1200 Diamond Circle, Unit K Tel: (816) 443-2494

Lafayette, CO 80026

Tel: (303) 604-6180 Date of Evaluation: 04/22/96
63

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performance of the method or equipment.

Revision Date: April 18, 1997

Campo/Miller, Inc.

LS300 and 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 leak is declared if the output of the measurement system equals or exceeds 

this threshold. 

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

Dispenser 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 Rev. by Ken Wilcox Associates

Tel: (209) 781-6862 Tel: (816) 443-2494

Date of Evaluation: 06/01/91, Rev. 09/09/94 
64

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performance of the method or equipment.

Revision Date: April 18, 1997

Campo/Miller, Inc.

LS300-120 and 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 leak is declared if the output of the measurement system equals or exceeds

this threshold. 

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

Dispenser 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 Rev. by Ken Wilcox Associates

Tel: (209) 781-6862 Tel: (816) 443-2494

Date of Evaluation: 06/01/91, Rev. 09/09/94
65

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performance of the method or equipment.

Revision Date: April 18, 1997

Campo/Miller, Inc.

LS300-120 PLUS and 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 leak is declared if the output of the measurement system equals or exceeds

this threshold. 

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

Dispenser 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 Rev. by Ken Wilcox Associates

Tel: (209) 781-6862 Tel: (816) 443-2494

Date of Evaluation: 06/01/91, Rev. 09/09/94
66

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performance of the method or equipment.

Revision Date: April 18, 1997

Campo/Miller, Inc.

LS300-120 PLUS, AL; LS300-120 PLUS, AL, A/S and 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 leak is declared if the output of the measurement system equals or exceeds

this threshold. 

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

Dispenser 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

Tel: (209) 781-6862 Date of Evaluation: 06/23/95
67

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performance of the method or equipment.

Revision Date: April 18, 1997

Campo/Miller, Inc.

LS300-120 PLUS, AL; LS300-120 PLUS, AL, A/S and 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 leak is declared if the output of the measurement system equals or exceeds

this threshold. 

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

Dispenser 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

Tel: (209) 781-6862 Date of Evaluation: 06/23/95
68

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performance of the method or equipment.

Revision Date: April 18, 1997

Campo/Miller, Inc.

LS300-120 PLUS, AL; LS300-120 PLUS, AL, A/S and 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 leak is declared if the output of the measurement system equals or exceeds

this threshold. 

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

Dispenser 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

Tel: (209) 781-6862 Date of Evaluation: 06/23/95
69

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performance of the method or equipment.

Revision Date: April 18, 1997

Computerizing, Inc.

Computank V. 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 leak is declared when leak rate equals or exceeds this threshold.

Applicability: Gasoline, diesel, aviation fuel, and 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

Tel: (205) 259-1805 Date of Evaluation: 09/17/92
70

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performance of the method or equipment.

Revision Date: April 18, 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 leak is declared if the output of the measurement system

equals or exceeds this threshold. 

Applicability: Gasoline, diesel, and 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.

Dispenser 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: No longer manufactured by Control Engineers.

Control Engineers Evaluator: Midwest Research Institute

P. O. Box 9037 Tel: (816) 753-7600

Houma, LA 70361

Tel: (504) 872-4541 Date of Evaluation: 07/18/94
71

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performance of the method or equipment.

Revision Date: April 18, 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 leak is declared if the output of the measurement system equals or exceeds 

this threshold. 

Applicability: Gasoline, diesel, and 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.

Dispenser 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: No longer manufactured by Control Engineers.

Control Engineers Evaluator: Midwest Research Institute

P. O. Box 9037 Tel: (816) 753-7600

Houma, LA 70361

Tel: (504) 872-4541 Date of Evaluation: 07/18/94
72

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performance of the method or equipment.

Revision Date: April 18, 1997

Control Engineers

CEI 3000 Tank Level Module - Version TLP2 

Normal/Rapid Test Mode

(Magnetostrictive Probe)

AUTOMATIC TANK GAUGING SYSTEM

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 leak is declared if the output of the measurement system equals or exceeds 

this threshold. 

Applicability: Gasoline, diesel, and 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
73

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performance of the method or equipment.

Simsbury, CT 06070-2003

Tel: (203) 561-2700 Date of Evaluation: 05/27/92
74

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performance of the method or equipment.

Revision Date: April 18, 1997

Control Engineers

CEI 3000 Tank Level Module - Version TLP2

Normal/Rapid Test Mode

(Magnetostrictive Probe)

AUTOMATIC TANK GAUGING SYSTEM

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 leak is declared if the output of the measurement system equals or exceeds 

this threshold. 

Applicability: Gasoline, diesel, and 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

Tel: (203) 561-2700 Date of Evaluation: 05/21/92
75

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performance of the method or equipment.

Revision Date: April 18, 1997

EBW, INC.

Auto-Stik II and Auto-Stik Jr.

(Magnetostrictive Probe)

AUTOMATIC TANK GAUGING SYSTEM

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

Leak Threshold: 0.1 gph. A leak is declared if the output of the measurement system equals or exceeds

this threshold. 

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

2814 McCraken Ave. Tel: (816) 443-2494

Muskegon, MI 49443

Tel: (800) 475-5151 Date of Evaluation: 08/20/93
76

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performance of the method or equipment.

Revision Date: April 18, 1997

EBW, INC.

Auto-Stik II and Auto-Stik Jr.

(Magnetostrictive Probe)

AUTOMATIC TANK GAUGING SYSTEM

Certification: Leak rate of 0.1 gph with PD=98.3% and PFA=1.7%.

Leak Threshold: 0.05 gph. A leak is declared if the output of the measurement system equals or exceeds

this threshold. 

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

2814 McCraken Ave. Tel: (816) 443-2494

Muskegon, MI 49443

Tel: (800) 475-5151 Date of Evaluation: 08/20/93
77

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performance of the method or equipment.

Revision Date: April 18, 1997

EBW, Inc.

AUTO-STIK Discriminating Sensors

LS-5, LS-35

LIQUID-PHASE INTERSTITIAL DETECTOR

Detector:

Output type: qualitative

Sampling frequency: continuous

Operating principle: float switch and product permeability

Test Results:

LS-5 LS-35

unleaded 

gasoline

diesel 

fuel water

unleaded 

gasoline

diesel

fuel water

Float switch

Accuracy (%) 100 100 100 100 100 100

Detection time (sec) <1 <1 <1 <1 <1 <1

Fall time (sec) <1 <1 <1 <1 <1 <1

Lower detection limit (in) 1.317 1.234 1.516 1.317 1.234 1.156

Polymer strip

Accuracy (%) 100 100 N/R* 100 100 N/R

Detection time (min) ~7 ~60 N/A* ~7 ~60 N/A

Fall time (sec) N/A N/A N/A N/A N/A N/A

Lower detection limit (in) <0.014 <0.014 N/A <0.014 <0.014 N/A

*See glossary.

Specificity Results:

Activated: unleaded gasoline, diesel fuel, water.

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:

Operating temperatures for LS-5 are -40 degrees F to 150 degrees F (-40 degrees C to 65.5 degrees C).

Operating temperatures for LS-30A are -40 degrees F to 140 degrees F(-40 degrees C to 60 degrees C).

There is no manufacturer’s recommended maintenance schedule.

Comments:

Test procedures used were modified by evaluator from EPA's "Standard Test Procedures for Evaluating 

Leak Detection Methods: Liquid-Phase Out-of-Tank Product Detectors," and from EPA's "Standard Test 

Procedures for Evaluating Leak Detection Methods: Nonvolumetric Tank Tightness Testing Methods," March 

1990.

Polymer sensor can be reset by exposing it to air.

Detector is reusable. 

Evaluation also included the LS-10, LS-15, and LS-20 liquid-phase out-of-tank product detectors which are listed 

separately.

EBW, INC. Evaluator: Ken Wilcox Associates
78

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performance of the method or equipment.

2814 McCraken Ave. Tel: (816) 443-2494

Muskegon, MI 49443

Tel: (616) 755-1671 Date of Evaluation: 07/05/94
79

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performance of the method or equipment.

Revision Date: April 18, 1997

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

unleaded gasoline diesel water

Float Switch

Accuracy (%) 100 100 100

Detection time (sec) <1 <1 <1

Fall time (sec) <1 <1 <1

Lower detection limit (in) 2.870 2.822 2.667

Polymer Strip

Accuracy (%) 100 100 N/R*

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:

Activated: unleaded gasoline, diesel fuel, and water.

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: 

EPA and many states require detection of 1/8 inch (0.32 cm) of product for groundwater monitoring. 

Test procedures used were modified by evaluator from EPA's "Standard Test Procedures for Evaluation Leak 

Detection Methods: Liquid-Phase Out-of-Tank Product Detectors," March 1990, and from EPA’s “Standard Test 

Procedures for Evaluating Leak Detection Methods:Nonvolumetric Tank Tightness Testing Methods,” March 

1990.

Polymer sensor can be reset by exposing it to air.

Detector is reusable.

This evaluation also included the LS-5 and LS-35 interstitial detectors, which are listed separately.

EBW, INC. Evaluator: Ken Wilcox Associates

2814 McCraken Ave. Tel: (816) 443-2494
80

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performance of the method or equipment.

Muskegon, MI 49443

Tel: (616) 755-1671 Date of Evaluation: 07/05/94
81

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performance of the method or equipment.

Revision Date: April 18, 1997

EBW, Inc.

Liquid Sensor System

LS-3A, LS-30A, LS-7

LIQUID-PHASE INTERSTITIAL DETECTOR

Detector:

Output type: qualitative

Sampling frequency: continuous

Operating principle: float switch

Test Results:

LS-3A N.C. (normally closed) LS-3A N.O. (normally open)

unleaded 

gasoline

diesel

fuel water

unleaded 

gasoline

diesel

fuel water

Accuracy (%) 100 100 100 100 100 100

Detection time (sec) <1 <1 <1 <1 <1 <1

Fall time (sec) <1 <1 <1 <1 <1 <1

Lower detection limit (cm) 2.59 2.36 2.08 2.59 2.39 2.08

LS-30A (low level) LS-30A (high level) LS-7

unleaded 

gasoline

diesel

fuel water

unleaded 

gasoline

diesel

fuel water

unleaded 

gasoline water

Accuracy (%) 100 100 100 100 100 100 100 100

Detection time (min:sec) <1 <1 <1 <1 <1 <1 <1 <1

Fall time (hr:min:sec) <1 <1 <1 <1 <1 <1 <1 <1

Lower detection limit (cm) 8.79 8.48 8.15 23.65 23.04 22.78 1.09 0.81

Specificity Results:

Activated: unleaded gasoline, diesel fuel (except LS-7), water.

Sensors will respond to any liquid which has sufficient depth and density to raise float.

Manufacturer’s Specifications:

Operating temperatures for LS-3A are -40 degrees F to 180 degrees F (-40 degrees C to 82.2 degrees C).

Operating temperatures for LS-30A are -40 degrees F to 140 degrees F(-40 degrees C to 60 degrees C).

Minimum specific gravity for LS-7A is 0.70.

There is no manufacturer’s recommended maintenance schedule.

Comments:

Test procedures used were modified by evaluator from EPA's "Standard Test Procedures for Evaluating 

Leak Detection Methods: Liquid-Phase Out-of-Tank Product Detectors," March 1990 

Detector is reusable. 

EBW, Inc. Evaluator: Ken Wilcox Associates

2814 McCracken Ave. Tel: (816) 443-2494

Muskegon, MI 49443

Tel: (616)755-1671 Date of Evaluation: 04/20/93
82

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performance of the method or equipment.

 Revision Date: April 18, 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 leak is declared if the output of the measurement system equals or exceeds 

this threshold. 

Applicability: Gasoline, diesel, aviation fuels, fuel oil #4, waste oil, and 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 methods 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 ranges from 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

hydralic noise in pipeline).

Declares leak if current changes in pressure exceed tuning parameters, or if pressure 

fluctuates in a manner that is characteristic of a leak.

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

Calibration: System must be checked annually. Standard electronic field instruments used by the 

system require 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.

D

EFA Technologies, Inc. Evaluator: Ms. Terri Regan - Naval Facilities Engineering 

116 20th St. Service Center

Sacramento, CA 95814 Tel: (202) 433-5196
83

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performance of the method or equipment.

Tel: (916) 443-8842 Date of Evaluation: 09/26/95
84

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performance of the method or equipment.

Revision Date: April 18, 1997

Egemin Naamloze Vennootschap

E'SPI III

(Mass Buoyancy Probe)

AUTOMATIC TANK GAUGING SYSTEM

Certification: Leak rate of 0.2 gph with PD=97.9% and PFA=1.1%.

Leak Threshold: 0.075 gph. A leak is declared if the output of the measurement system equals or 

exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel, and 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

Tel: 011-32-3-03/645 27 90 Date of Evaluation: 12/21/90
85

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performance of the method or equipment.

Revision Date: April 18, 1997

Egemin Naamloze Vennootschap

E'SPI IV

(Mass Buoyancy Probe)

AUTOMATIC TANK GAUGING SYSTEM

Certification: Leak rate of 0.2 gph with PD=97.2% and PFA=0.3%.

Leak Threshold: 0.1 gph. A leak is declared if the output of the measurement system equals or exceeds

this threshold. 

Applicability: Gasoline, diesel, aviation fuel, fuel oil, and 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
86

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performance of the method or equipment.

Revision Date: April 18, 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 leak is declared if the output of the measurement system equals or 

exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel, and 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.

Dispenser 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

114 MacKenan Dr. Tel: (816) 443-2494

Cary, NC 27511

Tel: (800) 342-6125 Date of Evaluation: 12/31/93
87

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performance of the method or equipment.

Revision Date: April 18, 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 leak is declared if the output of the measurement system equals or

exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel, and 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.

Dispenser 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.

114 MacKenan Dr. Tel: (816) 443-2494

Cary, NC 27511

Tel: (800) 342-6125 Date of Evaluation: 07/18/94
88

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performance of the method or equipment.

Revision Date: April 18, 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 leak is declared if the output of the measurement system equals or exceeds 

this threshold. 

Applicability: Gasoline, diesel, aviation fuel, and 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.

Dispenser 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

114 MacKenan Dr. Tel: (816) 443-2494

Cary, NC 27511

Tel: (800) 342-6125 Date of Evaluation: 12/31/93
89

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performance of the method or equipment.

Revision Date: April 18, 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 leak is declared if the output of the measurement system equals or exceeds 

this

threshold. 

Applicability: Gasoline, diesel, aviation fuel, and 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.

Dispenser 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

114 MacKenan Dr. Tel: (816) 443-2494

Cary, NC 27511

Tel: (800) 342-6125 Date of Evaluation: 07/18/94
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.

Revision Date: April 18, 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 leak is declared if the output of the measurement system equals or exceeds 

this threshold. 

Applicability: Gasoline, diesel, aviation fuel, and 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.

Dispenser 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

114 MacKenan Dr. Tel: (816) 443-2494

Cary, NC 27511

Tel: (800) 342-6125 Date of Evaluation: 07/18/94
91

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performance of the method or equipment.

Revision Date: April 18, 1997

Emco Electronics, Tuthill Corp.

EECO System TLM/0.2 gph Precision Test

(Magnetostrictive Probe)

AUTOMATIC TANK GAUGING SYSTEM

Certification: Leak rate of 0.2 gph with PD = 99.1% and PFA = 0.9%.

Leak Threshold: 0.1 gph. A leak is declared if the output of the measurement system equals or exceeds

this threshold. 

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

There must be no dispensing or delivery during waiting time. 

Test Period: Minimum of 1 hour, 54 minutes

Test data are acquired and recorded by a microprocessor.

Microprocessor automatically determines test time based on tank size and product level. 

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 0.66 inch.

Minimum detectable change in water level is 0.039 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.

Emco Electronics, Tuthill Corp. Evaluator: Ken Wilcox Associates

114 MacKenan Dr. Tel: (816) 443-2494

Cary, NC 27511

Tel: (800) 342-6125 Date of Evaluation: 12/23/93
92

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performance of the method or equipment.

Revision Date: April 18, 1997

Emco Electronics, Tuthill Corp.

EECO System TLM/0.1 gph Precision Test

(Magnetostrictive Probe)

AUTOMATIC TANK GAUGING SYSTEM

Certification: Leak rate of 0.1 gph with PD = 99% and PFA = 1%.

Leak Threshold: 0.05 gph. A leak is declared if the output of the measurement system equals or exceeds

this threshold. 

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

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.

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.

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 0.66 inch.

Minimum detectable change in water level is 0.039 inch.

Calibration: RTDs and probe must be checked regularly 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.

Emco Electronics, Tuthill Corp. Evaluator: Midwest Research Institute

114 MacKenan Dr. Tel: (816) 753-7600

Cary, NC 27511

Tel: (800) 342-6125 Date of Evaluation: 02/08/94
93

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performance of the method or equipment.

Revision Date: April 18, 1997

Emco Electronics, Tuthill Corp.

EECO System TLM/0.2 gph Quick Test

(Magnetostrictive Probe)

AUTOMATIC TANK GAUGING SYSTEM

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

Leak Threshold: 0.1 gph. A leak is declared if the output of the measurement system equals or exceeds

this threshold. 

Applicability: Gasoline, diesel, aviation fuel, fuel oils #4 and #6, waste oil, and 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: Ranges from 1 to 6 hours between delivery and testing depending on tank conditions. 

There must be no dispensing or delivery during waiting time.

Test Period: Minimum of 53 minutes.

Test data are acquired and recorded by a microprocessor.

Microprocessor automatically determines test time based on tank size and product level.

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 0.66 inch.

Minimum detectable change in water level that can be declared is 0.039 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.

Emco Electronics, Tuthill Corp. Evaluator: Ken Wilcox Associates

114 MacKenan Dr. Tel: (816) 443-2494

Cary, NC 27511

Tel: (800) 342-6125 Date of Evaluation: 12/23/93
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.

Revision Date: April 18, 1997

Emco Electronics, Tuthill Corp.

EECO System TLM/0.1 gph Quick Test

(Magnetostrictive Probe)

AUTOMATIC TANK GAUGING SYSTEM

Certification: Leak rate of 0.1 gph with PD = 96% and PFA = 4%.

Leak Threshold: 0.05 gph. A leak is declared if the output of the measurement system equals or exceeds

this threshold. 

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

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. 

None between dispensing and testing.

There must be no delivery during waiting time.

Test Period: Minimum of 1 hour, 44 minutes.

During the evaluation, test duration averaged 2 hours, 46 minutes at 50% full and

1 hour, 44 minutes at 95% full.

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 0.66 inch.

Minimum detectable change in water level is 0.039 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.

Emco Electronics, Tuthill Corp. Evaluator: Midwest Research Institute

114 MacKenan Dr. Tel: (816) 753-7600

Cary, NC 27511

Tel: (800) 342-6125 Date of Evaluation: 02/15/94
95

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performance of the method or equipment.

Revision Date: April 18, 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 Leak Sensor II Leak Sensor Jr.

unleaded 

gasoline

synthetic 

gasoline

unleaded 

gasoline

synthetic 

gasoline

unleaded 

gasoline

synthetic

gasoline

Accuracy (%) 100 100 100 100 100 100

Detection time (sec) <5 <5 <5 <5 <5 <5

Fall time (sec) manual reset manual reset manual 

reset

manual 

reset

manual 

reset

manual reset

Lower detection limits (cm)

 Thermistor 1.22 1.12 1.14 1.14 1.24 1.19

 Proximity 0.97 1.04 1.12 1.17 1.12 1.17

Specificity Results:

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

Comments:

EPA and many states require detection of 1/8 inch (0.32 cm) of product for groundwater 

monitoring. 

Test procedures used were modified by evaluator from EPA’s “Standard Test Procedures for 

Evaluating Leak Detection Methods: Liquid-Phase Out-of-Tank Product Detectors,” March 1990 

and “Standard Test Procedures for Non-Volumetric Tank Tightness Test Methods,” March 1990. 

Detector is reusable. 

Systems alarm if either water or product leaks into interstitial space.

Emco Electronics, Tuthill Corp. Evaluator: Ken Wilcox Associates

114 MacKenan Dr. Tel: (816) 443-2494

Cary, NC 27511

Tel: (800) 342-6125 Date of Evaluation: 11/09/92
96

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performance of the method or equipment.

Revision Date: April 18, 1997

Engineered Systems, Inc.

Image II

(Magnetostrictive Probe)

AUTOMATIC TANK GAUGING SYSTEM

Certification: Leak rate of 0.2 gph with PD = 96.6% and PFA = 3.4%.

Leak Threshold: 0.1 gph. A leak is declared if the output of the measurement system equals or exceeds

this threshold. 

Applicability: Gasoline, diesel, aviation fuel, and 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

Tel: (602) 438-1362 Date of Evaluation: 08/20/93
97

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performance of the method or equipment.

Revision Date: April 18, 1997

Entropy Limited

Precision Tank Inventory Control System Rev. 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 leak is declared when leak rate equals or exceeds this threshold.

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

Tank Capacity: Maximum of 21,000 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 manifolded tank systems using an acceptable protocol.

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

Tel: (617) 256-8901 Date of Evaluation: 11/30/93
98

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performance of the method or equipment.

Revision Date: April 18, 1997

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 leak is declared when leak rate 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

Tel: (617) 256-8901 Date of Evaluation: 04/02/91
99

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

performance of the method or equipment.

 Revision Date: April 18, 1997

Environment and Safety

EASI Level-Tru

(Magnetostrictive Probe)

AUTOMATIC TANK GAUGING SYSTEM

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

Leak Threshold: 0.1 gph. A leak is declared if the output of the measurement system equals or exceeds

this threshold. 

Applicability: Gasoline, diesel, aviation fuel, fuel oil #4, antifreeze, brake fluid, transmission fluid, and 

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

2075 O'Toole Ave. Tel: (816) 753-7600

San Jose, CA 95131

Tel: (408) 954-9081 Date of Evaluation: 04/11/91
100

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performance of the method or equipment.

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 (min:sec) N/A* N/A

Fall time (min:sec) 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

Tel: (800) 375-7747 Date of Evaluation: 04/20/93
101

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performance of the method or equipment.

 Revision Date: April 18, 1997

FCI Environmental, Inc.

Analog Hydrocarbon Probe AHP-100

LIQUID-PHASE OUT-OF-TANK PRODUCT DETECTOR

Detector:

Output type: qualitative

Sampling frequency: continuous

Operating principle: fiber optic chemical sensor

Test Results:

unleaded synthetic 

gasoline gasoline

Accuracy (%) 100 100 

Detection time (min) <8 <8

Fall time (min) <5 <5

Lower detection limit (cm) <0.01 <0.01

Specificity Results:

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

Comments:

EPA and many states require detection of 1/8 inch (0.32 cm) of product for groundwater monitoring. 

Detector is reusable.

FCI Environmental, Inc. Evaluator: Ken Wilcox Associates

1181 Grier Dr., Bldg. B Tel: (816) 443-2494

Las Vegas, NV 89119

Tel: (800) 510-3627 Date of Evaluation: 01/15/94
102

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performance of the method or equipment.

Revision Date: April 18, 1997

FCI Environmental, Inc.

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 synthetic 

gasoline gasoline

Accuracy (%) 100 100 

Detection time (min) <8 <8

Fall time (min) <5 <5

Lower detection limit (cm) <0.01 <0.01

Specificity Results:

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

Comments:

EPA and many states require detection of 1/8 inch (0.32 cm) of product for groundwater monitoring. 

Detector is reusable.

FCI Environmental, Inc. Evaluator: Ken Wilcox Associates

1181 Grier Dr., Bldg. B Tel: (816) 443-2494

Las Vegas, NV 89119

Tel: (800) 510-3627 Date of Evaluation: 01/15/94
103

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performance of the method or equipment.

Revision Date: April 18, 1997

FCI Environmental, Inc.

Analog Hydrocarbon Probe AHP-100

VAPOR-PHASE OUT-OF-TANK PRODUCT DETECTOR

Detector:

Output type: quantitative

Sampling frequency: continuous

Operating principle: fiber optic

Test Results:

EPA March 1990 protocol Radian June 1990 protocol

xylene benzene 2-methylbutane unleaded gasoline synthetic 

gasoline

Relative accuracy* (%) 2 35 N/R*12 22

Bias (%) 1 -23 N/R -7 -2

Precision (%) 1 11 N/R 4 15

Detection time (min) <1 <1 N/R <1 <1

Fall time (min) <1 <1 N/R <1 <1

Lower Detect. Limit (ppm) 84 519 N/R 137 220

* See glossary.

Lower detection limit for other fuels (ppm):

diesel

JP-4

 jet fuel

JP-8

jet fuel synthetic fuel p-xylene kerosene unleaded gasoline

1.01 3.08 2.22 3.43 2.60 2.18 2.02

Specificity Results (%) (corrected for sensitivity differences):

EPA March 1990 protocol Radian June 1990 protocol

benzene 76 unleaded gasoline 93

toluene 96 synthetic gasoline 98

p-xylene 101 JP-4 jet fuel 105

synthetic gasoline 100 n-hexane N/R

trimethylbenzene 107 xylene 103

methane N/R

butane N/R

2-methylbutane N/R

pentane N/R

Comments:

Test procedures used were a combination of EPA's "Standard Test Procedures for Evaluation Leak Detection

Methods: Vapor-Phase Out-of-Tank Product Detectors, "March 1990, and Radian Corporation's draft report

"Development of Procedures to Assess the Performance of External Leak Detection Devices: Vapor-Phase

ASTM-Formatted Methods," June 6, 1990. 

FCI Environmental, Inc. Evaluator: Ken Wilcox Associates

1181 Grier Dr., Bldg. B Tel: (816) 443-2494

Las Vegas, NV 89119
104

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

performance of the method or equipment.

Tel: (800) 510-3627 Date of Evaluation: 03/07/94 and 12/05/94
105

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

performance of the method or equipment.

Revision Date: April 18, 1997

FCI Environmental, Inc.

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:

EPA March 1990 protocol Radian June 1990 protocol

xylene benzene 2-methylbutane unleaded gasoline synthetic 

gasoline

Relative accuracy* (%) 0 17 N/R*18 29

Bias (%) 0 -9 N/R 1 -12

Precision (%) 0 11 N/R 9 10

Detection time (min) <1 <1 N/R <1 <1

Fall time (min) <1 <1 N/R <1 <1

Lower Detect. Limit (ppm) 45 280 N/R 73 118

* See glossary.

Specificity Results (%) (corrected for sensitivity differences):

EPA March 1990 protocol Radian June 1990 protocol

benzene 89 unleaded gasoline 101

toluene 97 synthetic gasoline 88

p-xylene 100 JP-4 jet fuel 109

synthetic gasoline 92 n-hexane 108

trimethylbenzene 104 xylene N/R

methane N/R

butane N/R

2-methylbutane N/R

pentane N/R

Comments:

Test procedures used were a combination of EPA's "Standard Test Procedures for Evaluation Leak Detection 

Methods: Vapor-Phase Out-of-Tank Product Detectors," March 1990, and Radian Corporation's draft report

"Development of Procedures to Assess the Performance of External Leak Detection Devices: Vapor-Phase

ASTM-Formatted Methods," June 6, 1990. 

FCI Environmental, Inc. Evaluator: Ken Wilcox Associates

1181 Grier Dr., Bldg. B Tel: (816) 443-2494

Las Vegas, NV 89119
106

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

performance of the method or equipment.

Tel: (800) 510-3627 Date of Evaluation: 03/07/94
107

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performance of the method or equipment.

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

pentane, 

2,4-dimethyl

pentane, 

2,3,4-trimethyl toluene m-xylene

Accuracy (%) 103 102 107 103 105 104 104 99

Bias (%) -1 1 2 1 1 1 1 -6

Precision (%) 2 2 4 2 3 3 3 4

Lower detection limit 

(ppm) 1 1 1 1 3 1 1 4

Specificity (%) 100 100 102 101 101 100 100 94

Specificity Results: See results above.

Comments:

Test procedures used were modified by evaluator from EPA's "Standard Test Procedures for Evaluating Leak 

Detection Methods: Vapor-Phase Out-of-Tank Product Detectors," March 1990. 

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.

P.O. Box 3930 University of Missouri - Columbia

Bryan, TX 77805 Tel: (573) 882-2439

Tel: (214)506-0588 Date of Evaluation: 07/27/94
108

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performance of the method or equipment.

Revision Date: April 18, 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 leak is declared if the output of the measurement system equals or exceeds

this threshold. 

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

Tel: (608) 838-8786 Date of Evaluation: 07/01/92
109

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performance of the method or equipment.

Revision Date: April 18, 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 leak is declared if the output of the measurement system 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

Tel: (608) 838-8786 Date of Evaluation: 04/30/94
110

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

performance of the method or equipment.

Revision Date: April 18, 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 leak is declared if the output of the measurement system equals or exceeds

this threshold. 

Applicability: Gasoline, diesel, aviation fuel, and 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

Tel: (608) 838-8786 Date of Evaluation: 03/24/94
111

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performance of the method or equipment.

Revision Date: April 18, 1997

Fluid Containment, Inc.

(formerly O/C Tanks Corp.)

Hydrostatic Precision Tank Test for DWT-Type II Tanks

DOUBLE WALLED TANK TIGHTNESS TEST

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 leak is declared if

the output of the measurement system equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel, and 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.

Fluid Containment, Inc. Evaluator: Vista Research

Route 20, Box 1380 Tel: (415) 966-1171

Conroe, TX 77301

Tel: (409) 756-7731 Date of Evaluation: 05/15/91
112

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performance of the method or equipment.

Revision Date: April 18, 1997

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

Gasboy TMS 500

(Magnetostrictive Probe)

AUTOMATIC TANK GAUGING SYSTEM

Certification: Leak rate of 0.2 gph with PD = 99.91% and PFA = 0.09%.

Leak Threshold: 0.1 gph. A leak is declared if the output of the measurement system equals or exceeds

this threshold. 

Applicability: Gasoline, diesel, aviation fuel, and 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 temperature sensors.

Water Sensor: Must be used to detect water ingress.

Minimum detectable water level in the tank is 1.04 inches.

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

P.O. Box 309 Tel: (816) 443-2494

Lansdale, PA 19446

Tel: (215) 855-4631 Date of Evaluation: 05/10/91
113

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performance of the method or equipment.

Revision Date: April 18, 1997

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 leak is declared if the output of the measurement system equals or 

exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel, and 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 128 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.

Dispenser 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 Rev. by Ken Wilcox Associates, Inc.

Tel: (910) 547-5000 Tel: (816) 443-2494

Date of Evaluation: 09/20/91, Rev. 04/12/93
114

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

performance of the method or equipment.

 Revision Date: April 18, 1997

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 leak is declared if the output of the measurement system equals or exceeds 

this threshold. 

Applicability: Gasoline, diesel, aviation fuel, and 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 128 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.

Dispenser 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 27420 Rev. by Ken Wilcox Associates, Inc.

Tel: (910) 547-5000 Tel: (816) 443-2494

Date of Evaluation: 09/20/91, Rev. 04/12/93
115

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

performance of the method or equipment.

Revision Date: April 18, 1997

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 leak is declared if the output of the measurement system equals or 

exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel, and 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 128 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.

Dispenser 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 27420 Rev. by Ken Wilcox Associates, Inc.

Tel: (910) 547-5000 Tel: (816) 443-2494

Date of Evaluation: 09/20/91, Rev. 04/12/93
116

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

performance of the method or equipment.

Revision Date: April 18, 1997

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 leak is declared if the output of the measurement system equals or exceeds 

this threshold. 

Applicability: Gasoline, diesel, aviation fuel, and 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 158.4 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.

Dispenser 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 27420

Tel: (910) 547-5000 Date of Evaluation: 08/04/93
117

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

performance of the method or equipment.

Revision Date: April 18, 1997

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 leak is declared if the output of the measurement system equals or exceeds 

this threshold. 

Applicability: Gasoline, diesel, aviation fuel, and 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 158.4 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 ranges from 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.

Dispenser 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 27420

Tel: (910) 547-5000 Date of Evaluation: 08/04/93
118

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

performance of the method or equipment.

Revision Date: April 18, 1997

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 leak is declared if the output of the measurement system equals or exceeds 

this threshold. 

Applicability: Gasoline, diesel, aviation fuel, and 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 158.4 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 ranges from 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.

Dispenser 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 27420

Tel: (910) 547-5000 Date of Evaluation: 08/04/93
119

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performance of the method or equipment.

Revision Date: April 18, 1997

Gilbarco Environmental Products

EMC Environmental Management Console

EMC Basic Monitoring System Tank Monitor 2, 3, 2.1, and 3.1 PAO238000XXXX 

(Capacitance Probe)

AUTOMATIC TANK GAUGING SYSTEM

Certification: Leak rate of 0.2 gph with PD=99% and PFA=1%. 

Leak Threshold: 0.1 gph. A leak is declared if the output of the measurement system equals or exceeds 

this threshold. 

Applicability: Gasoline, diesel, aviation fuel, and 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 27420

Tel: (910) 547-5000 Date of Evaluation: 05/14/93
120

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performance of the method or equipment.

Revision Date: April 18, 1997

Gilbarco Environmental Products

EMC Environmental Management Console

EMC Basic Monitoring System Tank Monitor 2.1,3.1, PAO264XXX0000 

(Capacitance Probe)

AUTOMATIC TANK GAUGING SYSTEM

Certification: Leak rate of 0.2 gph with PD=99% and PFA=0.2%. 

Leak Threshold: 0.126 gph. A leak is declared if the output of the measurement system equals or exceeds 

this threshold. 

Applicability: Gasoline, diesel, aviation fuel, and 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 27420

Tel: (910) 547-5000 Date of Evaluation: 05/14/93
121

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performance of the method or equipment.

Revision Date: April 18, 1997

Gilbarco Environmental Products

EMC Environmental Management Console

EMC Basic Monitoring System Tank Monitor 2.1, 3.1, PAO264XXX0000 

(Capacitance Probe)

AUTOMATIC TANK GAUGING SYSTEM

Certification: Leak rate of 0.1 gph with PD=99% and PFA=0.1%. 

Leak Threshold: 0.071 gph. A leak is declared if the output of the measurement system equals or exceeds 

this threshold. 

Applicability: Gasoline, diesel, aviation fuel, and 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 27420

Tel: (910) 547-5000 Date of Evaluation: 05/14/93
122

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performance of the method or equipment.

Revision Date: April 18, 1997

Gilbarco Environmental Products

EMC Environmental Management Console

EMC Basic Monitoring System Tank Monitor 2.1, 3.1, PAO265XXX0000 

(Magnetostrictive Probe)

AUTOMATIC TANK GAUGING SYSTEM

Certification: Leak rate of 0.2 gph with PD=99% and PFA=0.1%. 

Leak Threshold: 0.093 gph. A leak is declared if the output of the measurement system equals or 

exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel, and 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 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 27420

Tel: (910) 547-5000 Date of Evaluation: 05/14/93
123

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performance of the method or equipment.

Revision Date: April 18, 1997

Gilbarco Environmental Products

EMC Environmental Management Console

EMC Basic Monitoring System Tank Monitor 2.1, 3.1, PAO265XXX0000 

(Magnetostrictive Probe)

AUTOMATIC TANK GAUGING SYSTEM

Certification: Leak rate of 0.1 gph with PD=99% and PFA=1%. 

Leak Threshold: 0.071 gph. A leak is declared if the output of the measurement system equals or exceeds

this threshold. 

Applicability: Gasoline, diesel, aviation fuel, and 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 dispensing or 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 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 0.544 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 27420

Tel: (910) 547-5000 Date of Evaluation: 03/14/95
124

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performance of the method or equipment.

Revision Date: April 18, 1997

Gilbarco Environmental Products

PA02590XXX000

LIQUID-PHASE INTERSTITIAL DETECTOR

Detector:

Output type: qualitative

Sampling frequency: continuous

Operating principle: float switch

Test Results: *

unleaded synthetic

gasoline gasoline

Accuracy (%) 100 100

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

*At a flow rate of 0.19 gal/hr in 7.6 cm diameter test chamber.

Specificity Results:

Activated: diesel fuel, synthetic fuel, heating oil #2, water.

Comments:

EPA and many states require detection of 1/8 inch (0.32 cm) of product for groundwater monitoring. 

Test procedures used were Carnegie Mellon Research Institute's "Test Procedures for Third Party 

Evaluation of Leak Detection Methods: Point Sensor Liquid Contact Leak Detection Systems": 

Final Report - November 11, 1991.

Detector is reusable.

Gilbarco Environmental Products Evaluator: Carnegie Mellon Research Institute

7300 W. Friendly Ave. Tel: (412) 268-3495

Greensboro, NC 27420

Tel: (910) 547-5000 Date of Evaluation: 07/17/92
125

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performance of the method or equipment.

Revision Date: April 18, 1997

Gilbarco Environmental Products

PA02591144000

LIQUID-PHASE INTERSTITIAL DETECTOR

Detector:

Output type: qualitative

Sampling frequency: continuous

Operating principle: float switch

Test Results:

unleaded synthetic

gasoline gasoline

Accuracy (%) 100 100

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

Specificity Results:

Activated: diesel fuel, synthetic fuel, heating oil #2, water.

Comments:

EPA and many states require detection of 1/8 inch (0.32 cm) of product for groundwater monitoring. 

Test procedures used were Carnegie Mellon Research Institute's "Test Procedures for Third Party 

Evaluation of Leak Detection Methods: Point Sensor Liquid Contact Leak Detection Systems": 

Final Report - November 11, 1991.

Detector is reusable.

Gilbarco Environmental Products Evaluator: Carnegie Mellon Research Institute

7300 W. Friendly Ave. Tel: (412) 268-3495

Greensboro, NC 27420

Tel: (910) 547-5000 Date of Evaluation: 07/17/92
126

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performance of the method or equipment.

Revision Date: April 18, 1997

Gilbarco Environmental Products

PA02592000000

LIQUID-PHASE INTERSTITIAL DETECTOR

Detector:

Output type: qualitative

Sampling frequency: continuous

Operating principle: float switch

Test Results:

unleaded synthetic

gasoline gasoline

Accuracy (%) 100 100

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

Specificity Results:

Activated: diesel fuel, synthetic fuel, heating oil #2, water.

Comments:

EPA and many states require detection of 1/8 inch (0.32 cm) of product for groundwater monitoring. 

Test procedures used were Carnegie Mellon Research Institute's "Test Procedures for Third Party 

Evaluation of Leak Detection Methods: Point Sensor Liquid Contact Leak Detection Systems": 

Final Report - November 11, 1991.

Detector is reusable.

Gilbarco Environmental Products Evaluator: Carnegie Mellon Research Institute

7300 W. Friendly Ave. Tel: (412) 268-3495

Greensboro, NC 27420

Tel: (910) 547-5000 Date of Evaluation: 07/17/92
127

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performance of the method or equipment.

Revision Date: April 18, 1997

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 synthetic

gasoline gasoline

Accuracy (%) 100 100

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:

Activated: unleaded gasoline, synthetic gasoline, 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:

EPA and many states require detection of 1/8 inch (0.32 cm) of product for groundwater monitoring. 

Detector is reusable.

Gilbarco Environmental Products Evaluator: Carnegie Mellon Research Institute

7300 W. Friendly Ave., Tel: (412) 268-3495

Greensboro, NC 27420

Tel: (910) 547-5000 Date of Evaluation: 11/20/91
128

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performance of the method or equipment.

Revision Date: April 18, 1997

Gilbarco Environmental Products

PA02660000000

VAPOR-PHASE OUT-OF-TANK PRODUCT DETECTOR

Detector:

Output type: qualitative

Sampling frequency: continuous

Operating principle: adsistor

Test Results:

unleaded synthetic JP-4

gasoline gasoline 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:

Activated: unleaded gasoline, JP-4 jet fuel.

Not activated: synthetic gasoline, n-hexane, toluene, xylene(s).

Comments:

Test procedures used were Radian Corporation's draft report "Development of Procedures to 

Assess the Performance of External Leak Detection Devices: Vapor-Phase ASTM-Formatted Methods," 

June 29, 1990.

Gilbarco Environmental Products Evaluator: Carnegie Mellon Research Institute

7300 W. Friendly Ave. Tel: (412) 268-3495

Greensboro, NC 27420

Tel: (910) 547-5000 Date of Evaluation: 07/24/92
129

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performance of the method or equipment.

Revision Date: April 18, 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 leak is declared if the output of the measurement system equals or exceeds 

this threshold. 

Applicability: Gasoline, diesel, and 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: Ranges from 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.

Dispenser 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

Tel: (619) 457-5880 Dates of Evaluation: 10/15/91 and 04/10/94
130

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performance of the method or equipment.

Revision Date: April 18, 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 leak is declared if the output of the measurement system equals or exceeds 

this threshold. 

Applicability: Gasoline, diesel, and 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: Ranges from 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.

Dispenser 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

Tel: (619) 457-5880 Dates of Evaluation: 10/15/91 and 04/10/94
131

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performance of the method or equipment.

 Revision Date: April 18, 1997

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 leak is declared if the output of the measurement system equals or exceeds 

this threshold. 

Applicability: Gasoline, diesel, and 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: Ranges from 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.

Dispenser 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

Tel: (619) 457-5880 Dates of Evaluation: 10/15/91 and 04/10/94
132

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

performance of the method or equipment.

Revision Date: April 18, 1997

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 leak is declared if the output of the measurement system equals or exceeds 

this threshold. 

Applicability: Gasoline, diesel, and 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: Ranges from 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.

Dispenser 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

Tel: (619) 457-5880 Dates of Evaluation: 10/15/91 and 04/10/94
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.

 Revision Date: April 18, 1997

Hasstech

Tank Compliance Center, Model 700

(7100 Series Magnetostrictive Probe)

AUTOMATIC TANK GAUGING SYSTEM

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

Leak Threshold: 0.1 gph. A leak is declared if the output of the measurement system equals or exceeds

this threshold.

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

Tel: (619) 457-5880 Date of Evaluation: 03/14/95
134

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

performance of the method or equipment.

Revision Date: April 18, 1997

Hasstech

Tank Compliance Center, Model 700

(7100 Series Magnetostrictive Probe)

AUTOMATIC TANK GAUGING SYSTEM

Certification: Leak rate of 0.1 gph with PD=99.6% and PFA=0.4%.

Leak Threshold: 0.05 gph. A leak is declared if the output of the measurement system equals or exceeds

this threshold.

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

Tel: (619) 457-5880 Date of Evaluation: 03/14/95
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.

 Revision Date: April 18, 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 leak is declared if the output of the measurement system equals or exceeds 

this threshold. 

Applicability: Gasoline, diesel, aviation fuel, and 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

Tel: (619) 457-5880 Date of Evaluation: 03/25/91
136

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performance of the method or equipment.

Revision Date: April 18, 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 leak is declared if the output of the measurement system equals or 

exceeds this threshold. 

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

6985 Flanders Dr. Tel: (201) 321-6631

San Diego, CA 92121

Tel: (619) 457-5880 Date of Evaluation: 11/88
137

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

performance of the method or equipment.

Revision Date: April 18, 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 leak is declared if the output of the measurement system equals or 

exceeds this threshold. 

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

Tel: (619) 457-5880 Date of Evaluation: 04/17/91
138

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

performance of the method or equipment.

Revision Date: April 18, 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 leak is declared if the output of the measurement system 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

Tel: (713) 947 9292 Date of Evaluation: 03/11/91
139

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performance of the method or equipment.

Revision Date: April 18, 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 leak is declared if the output of the measurement system equals or 

exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel, solvents, alcohols and 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

Tel: (713) 947-9292 Date of Evaluation: 12/15/90
140

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performance of the method or equipment.

Revision Date: April 18, 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 leak is declared if the output of the measurement system 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

Tel: (713) 947-9292 Date of Evaluation: 11/01/90
141

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performance of the method or equipment.

Revision Date: April 18, 1997

Horner Creative Products

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 leak is declared if the output of the measurement system equals or exceeds

this threshold. 

Applicability: Gasoline, diesel, aviation fuel, fuel oil #4, waste oil, and 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 Creative Products Evaluator: Ken Wilcox Associates

212 Morton St. Tel: (816) 443-2494

Bay City, MI 48706

Tel: (517) 893-3360 Date of Evaluation: 07/09/92
142

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performance of the method or equipment.

Revision Date: April 18, 1997

Horner Creative Products

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 leak is declared if the output of the measurement system equals or exceeds

this threshold. 

Applicability: Gasoline, diesel, aviation fuel, fuel oil #4, waste oil, and 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 Creative Products Evaluator: Ken Wilcox Associates

212 Morton St. Tel: (816) 443-2494

Bay City, MI 48706

Tel: (517) 893-3360 Date of Evaluation: 07/13/92
143

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performance of the method or equipment.

Revision Date: April 18, 1997

Horner Creative Products

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 leak is declared 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 leak is also declared if any water ingress is detected. 

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

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 the 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.

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. 

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 w ith 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 Creative Products Evaluator: Ken Wilcox Associates
144

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performance of the method or equipment.

212 Morton St. Tel: (816) 443-2494

Bay City, MI 48706

Tel: (517) 893-3360 Dates of Evaluation: 08/23/94 and 02/08/95
145

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performance of the method or equipment.

Revision Date: April 18, 1997

Horner Creative Products

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 leak is declared when leak rate equals or exceeds this threshold.

Applicability: Gasoline, diesel, aviation fuel, and 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 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 Creative Products Evaluator: Petro Works

212 Morton St. Tel: (913) 681-9379

Bay City, MI 48706

Tel: (517) 893-3360 Date of Evaluation: 04/07/93
146

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performance of the method or equipment.

Revision Date: April 18, 1997

Horner Creative Products

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 leak is declared when the leak rate equals or exceeds this threshold.

Applicability: Gasoline, diesel, aviation fuel, and 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 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 Creative Products Evaluator: Petro Works

212 Morton St. Tel: (913) 681-9379

Bay City, MI 48706

Tel: (517) 893-3360 Date of Evaluation: 04/07/93
147

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performance of the method or equipment.

Revision Date: April 18, 1997

Horner Creative Products

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 leak is declared when the leak rate equals or exceeds this threshold.

Applicability: Gasoline, diesel, aviation fuel, and 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 Creative Products Evaluator: Ken Wilcox Associates

212 Morton St. Tel: (816) 443-2494

Bay City, MI 48706

Tel: (517) 893-3360 Date of Evaluation: 04/07/93
148

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performance of the method or equipment.

Revision Date: April 18, 1997

Horner Creative Products

SIR PRO 1 Version 4.0

STATISTICAL INVENTORY RECONCILIATION TEST METHOD (QUATITATIVE)

Certification: Leak rate of 0.1 gph with PD=98% and PFA=2%. 

Leak Threshold: 0.05 gph. A leak is declared when leak rate equals or exceeds this threshold.

Applicability: Gasoline, diesel, aviation fuel, and 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 Creative Products Evaluator: Ken Wilcox Associates

212 Morton St. Tel: (816) 443-2494

Bay City, MI 48706

Tel: (517) 893-3360 Date of Evaluation: 07/18/95
149

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performance of the method or equipment.

Revision Date: April 18, 1997

Horner Creative Products

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 leak is declared if the output of the measurement system

equals or exceeds this threshold.

Applicability: Gasoline, diesel, aviation fuel, fuel oil #4, waste oil, and 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 Creative Products Evaluator: W. A. Kibbe and Associates

212 Morton St. Tel: (517) 797-2425

Bay City, MI 48706

Tel: (517) 893-3360 Date of Evaluation: 10/03/90
150

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performance of the method or equipment.

Revision Date: April 18, 1997

Horner Creative Products

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 leak is declared if the output of the measurement system equals or exceeds 

this threshold. 

Applicability: Gasoline, diesel, aviation fuel, fuel oil #4, waste oil, and 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 Creative Products Evaluator: W. A. Kibbe and Associates

212 Morton St. Tel: (517) 797-2425

Bay City, MI 48706

Tel: (517) 893-3360 Date of Evaluation: 09/18/90
151

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performance of the method or equipment.

Revision Date: April 18, 1997

Horner Creative Products

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 leak is declared if the output of the measurement system equals or 

exceeds this threshold. 

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

Calibration: Load cell must be calibrated before each use.

Comments: Not evaluated using manifold tank systems.

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 Creative Products Evaluator: W. A. Kibbe and Associates

212 Morton St. Tel: (517) 797-2425

Bay City, MI 48706

Tel: (517) 893-3360 Date of Evaluation: 06/25/90
152

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performance of the method or equipment.

Revision Date: April 18, 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 leak is declared if the output of the measurement equals or exceeds this 

threshold. 

Applicability: Gasoline, diesel, aviation fuel, fuel oil #4, and 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
153

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performance of the method or equipment.

Revision Date: April 18, 1997

IMO Industries Inc., Gems Sensors Division

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

*Although sensor is a polymer strip which is mounted in the monitoring well, monitor 

is a hand held unit which is typically connected to sensor periodically - hence the "intermittent" 

designation.

Test Results:

unleaded synthetic 

gasoline gasoline

Accuracy (%) 100 100 

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:

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

Comments:

EPA and many states require detection of 1/8 inch (0.32 cm) of product for groundwater monitoring. 

Detector is reusable.

IMO Industries Inc., Gems Sensors Division Evaluator: Carnegie Mellon Research Institute

Cowles Rd. Tel: (412) 268-3495

Plainville, CT 06062-1198

Tel: (203) 747-3000 Date of Evaluation: 04/22/93
154

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performance of the method or equipment.

 Revision Date: April 18, 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 leak is declared if the output of the measurement system equals or exceeds 

this threshold. 

Applicability: Gasoline, diesel, aviation fuels, and 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.

Dispenser 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

Tel: (800) 872-3455 Date of Evaluation: 07/06/95 
155

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performance of the method or equipment.

Revision Date: April 18, 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 leak is declared if the output of the measurement system equals or exceeds 

this threshold. 

Applicability: Gasoline, diesel, aviation fuels, and 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 ranges from 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.

Dispenser 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

Tel: (800) 872-3455 Date of Evaluation: 07/06/95 
156

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performance of the method or equipment.

Revision Date: April 18, 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 leak is declared if the output of the measurement system equals or exceeds 

this threshold. 

Applicability: Gasoline, diesel, aviation fuels, and 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.

Dispenser 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

Tel: (800) 872-3455 Date of Evaluation: 07/06/95 
157

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performance of the method or equipment.

Revision Date: April 18, 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 leak is declared if the output of the measurement system equals or exceeds 

this threshold. 

Applicability: Gasoline, diesel, aviation fuels, and 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.

Dispenser 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

Tel: (800) 872-3455 Date of Evaluation: 07/06/95 
158

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performance of the method or equipment.

Revision Date: April 18, 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 leak is declared if the output of the measurement system equals or exceeds 

this threshold.

Applicability: Gasoline, diesel, aviation fuels, and 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.

Dispenser 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

Tel: (800) 872-3455 Date of Evaluation: 07/06/95 
159

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performance of the method or equipment.

Revision Date: April 18, 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 leak is declared if the output of the measurement system equals or exceeds 

this threshold. 

Applicability: Gasoline, diesel, aviation fuels, and 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.

Dispenser 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

Tel: (800) 872-3455 Date of Evaluation: 07/06/95 
160

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performance of the method or equipment.

Revision Date: April 18, 1997

INCON Intelligent Controls, Inc.

TS 1000 

(Magnetostrictive Probe)

AUTOMATIC TANK GAUGING SYSTEM

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

Leak Threshold: 0.1 gph. A leak is declared if the measured slope by the system equals or exceeds this

threshold. 

Applicability: Gasoline, diesel, aviation fuel, fuel oil, waste oil, and motor 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 4 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 5 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.

INCON Intelligent Controls, Inc. Evaluator: Ken Wilcox Associates

74 Industrial Park Rd. Tel: (816) 443-2494

Saco, ME 04072

Tel: (800) 872-3455 Date of Evaluation: 08/05/92
161

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

performance of the method or equipment.

Revision Date: April 18, 1997

INCON Intelligent Controls, Inc.

TS 2000

(Magnetostrictive Probe)

AUTOMATIC TANK GAUGING SYSTEM

Certification: Leak rate of 0.2 gph with PD=99.9% and PFA=0.5%. 

Leak Threshold: 0.058 gph. A leak is declared if the measured slope by the system equals or exceeds this

threshold. 

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

INCON Intelligent Controls, Inc. Evaluator: Ken Wilcox Associates

74 Industrial Park Rd. Tel: (816) 443-2494

Saco, ME 04072

Tel: (800) 872-3455 Date of Evaluation: 05/10/91
162

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

performance of the method or equipment.

Revision Date: April 1, 1997

INCON Intelligent Controls, Inc.

Tank Sentinel TS-1000EFI

TSP-DIS BriteSensor

LIQUID-PHASE INTERSTITIAL DETECTOR

Detector:

Output type: qualitative

Sampling frequency: continuous

Operating principle: opto-electric

Test Results:

unleaded synthetic diesel heating

gasoline water gasoline fuel oil #2

Accuracy (%) 100 100 100 100 100

Detection time (min:sec) 03:13 03:18 03:17 3:00 3:02

Fall time (min) <01 <01 <01 <01 <01

Lower detection limit (cm) 

 product activation height 1.60 1.92 N/D* N/D N/D

* See glossary.

Specificity Results:

Activated: unleaded gasoline, synthetic gasoline, diesel fuel, heating oil #2, water.

Comments:

EPA and many states require detection of 1/8 inch (0.32 cm) of product for groundwater monitoring.

Test procedures used were Carnegie Mellon Research Institute's "Test Procedures for Third Party Evaluation of 

Leak Detection Methods: Point Sensor Liquid Contact Leak Detection Systems": Final Report - November 11, 

1991.

Detector is reusable.

INCON Intelligent Controls, Inc. Evaluator: Carnegie Mellon Research Institute

74 Industrial Park Rd. Tel: (412) 268-3495

Saco, ME 04072

Tel: (800) 872-3455 Date of Evaluation: 12/09/94
163

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

performance of the method or equipment.

Revision Date: April 1, 1997

INCON Intelligent Controls, Inc.

Tank Sentinel TS-1000EFI

TSP-HIS BriteSensor

LIQUID-PHASE INTERSTITIAL DETECTOR

Detector:

Output type: qualitative

Sampling frequency: continuous

Operating principle: magnetic switch

Test Results:

50 wt% Ethylene glycol in water 30 wt% Calcium chloride in water

up down up down

Accuracy (%) 100 100 100 100

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

Specificity Results:

Activated: 50 wt% Ethylene glycol in water, 30 wt% Calcium chloride in water.

Comments:

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.

Test procedures used were modified by evaluator from Carnegie Mellon Research Institute's "Test Procedures for 

Third Party Evaluation of Leak Detection Methods: Point Sensor Liquid Contact Leak Detection Systems": Final 

Report - November 11, 1991.

Detector is reusable.

INCON Intelligent Controls, Inc. Evaluator: Carnegie Mellon Research Institute

74 Industrial Park Rd. Tel: (412) 268-3495

Saco, ME 04072

Tel: (800) 872-3455 Date of Evaluation: 03/20/95
164

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

performance of the method or equipment.

Revision Date: April 1, 1997

INCON Intelligent Controls, Inc.

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:

TSP-EIS unleaded synthetic diesel heating

gasoline water gasoline fuel oil #2

Accuracy (%) 100 100 100 100 100

Detection time (min:sec) 03:01 03:07 03:17 3:00 3:02

Fall time (min) <01 <01 <01 <01 <01

Lower detection limit (cm)

 product activation height 1.50 N/D* N/D N/D N/D

Test Results:

TSP-PS unleaded synthetic diesel heating

gasoline water gasoline fuel oil #2

Accuracy (%) 100 100 100 100 100

Detection time (min:sec) 01:14 01:25 01:13 01:10 01:16

Fall time (min) <01 <01 <01 <01 <01

Lower detection limit (cm)

 product activation height 1.37 N/D N/D N/D N/D

* See glossary.

Specificity Results:

Activated: unleaded gasoline, synthetic gasoline, diesel fuel, heating oil #2, water.

Comments:

EPA and many states require detection of 1/8 inch (0.32 cm) of product for groundwater monitoring.

Test procedures used were Carnegie Mellon Research Institute's "Test Procedures for Third Party Evaluation of 

Leak Detection Methods: Point Sensor Liquid Contact Leak Detection Systems": Final Report - November 11, 

1991.

Detector is reusable.

INCON Intelligent Controls, Inc. Evaluator: Carnegie Mellon Research Institute

74 Industrial Park Rd. Tel: (412) 268-3495

Saco, ME 04072

Tel: (800) 872-3455 Dates of Evaluations: EIS - 01/30/96; PS -

07/02/93
165

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performance of the method or equipment.

Revision Date: April 1, 1997

INCON Intelligent Controls, Inc.

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-HLS unleaded synthetic diesel heating

gasoline water gasoline fuel oil #2

Accuracy (%) 100 100 100 100 100

Detection time (min:sec) 10:09 09.25 10:14 09:55 10:25

Fall time (min) <01 <01 <01 <01 <01

Lower detection limit (cm)

 product activation height 5.64 N/D* N/D N/D N/D

Test Results:

TSP-ULS unleaded synthetic diesel heating

gasoline water gasoline fuel oil #2

Accuracy (%) 100 100 100 100 100

Detection time (min:sec) 03:50 03.34 03:49 03:50 03:41

Fall time (min) <01 <01 <01 <01 <01

Lower detection limit (cm)

 product activation height 2.70 N/D N/D N/D N/D

* See glossary.

Specificity Results:

Activated: unleaded gasoline, synthetic gasoline, diesel fuel, heating oil #2, water.

Comments:

EPA and many states require detection of 1/8 inch (0.32 cm) of product for groundwater monitoring.

Test procedures used were Carnegie Mellon Research Institute's "Test Procedures for Third Party Evaluation of 

Leak Detection Methods: Point Sensor Liquid Contact Leak Detection Systems": Final Report - November 11, 

1991.

Detector is reusable.

INCON Intelligent Controls, Inc. Evaluator: Carnegie Mellon Research Institute

74 Industrial Park Rd. Tel: (412) 268-3495

Saco, ME 04072

Tel: (800) 872-3455 Date of Evaluations: 01/30/96
166

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

performance of the method or equipment.

Revision Date: April 1, 1997

INCON Intelligent Controls, Inc.

Tank Sentinel TS-1000EFI

TSP-DDS BriteSensor, TSP-DTS BriteSensor

LIQUID-PHASE OUT-OF-TANK PRODUCT DETECTOR

Detector:

Output type: qualitative

Sampling frequency: continuous

Operating principle: magnetic switch, float, and hydrocarbon sensitive polymer

Test Results:

TSP-DDS unleaded water - water - synthetic diesel heating

gasoline low level high level gasoline fuel oil #2

Accuracy (%) 100 100 100 100 100 100

Detection time (min:sec) 05:35 06:02 06:09 06:00 38:43 38:16

Fall time (min:sec) 34:27 <01:00 <01:00 28:53 > 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

Test Results:

TSP-DTS unleaded water - water - synthetic diesel heating

gasoline low level high level gasoline fuel oil #2

Accuracy (%) 100 100 100 100 100 100

Detection time (min:sec) 06:02 06:02 06:13 05:59 38:43 38:16

Fall time (min:sec) 22:28 <01:00 <01:00 28:53 > 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

* See glossary.

Specificity Results:

Activated: unleaded gasoline, synthetic gasoline, diesel fuel, heating oil #2, water.

Comments:

EPA and many states require detection of 1/8 inch (0.32 cm) of product for groundwater monitoring.

Test procedures used were Carnegie Mellon Research Institute's "Test Procedures for Third Party Evaluation of 

Leak Detection Methods: Point Sensor Liquid Contact Leak Detection Systems": Final Report - November 11, 

1991. The procedures for lower detection limit for product thickness were EPA’s “Standard Test Procedures for 

Evaluating Leak Detection Methods: Liquid-Phase Out-of-Tank Product Detectors,” March 1990.

Detector is reusable.

INCON Intelligent Controls, Inc. Evaluator: Carnegie Mellon Research Institute

74 Industrial Park Rd. Tel: (412) 268-3495

Saco, ME 04072

Tel: (800) 872-3455 Date of Evaluations: 12/09/94
167

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

performance of the method or equipment.

Revision Date: April 1, 1997

INCON Intelligent Controls, Inc.

Tank Sentinel TS-1000EFI

TSP-MWS BriteSensor Groundwater Probe

LIQUID-PHASE OUT-OF-TANK PRODUCT DETECTOR

Detector:

Output type: qualitative

Sampling frequency: continuous

Operating principle: hydrocarbon-sensitive polymer

Test Results:

unleaded synthetic

gasoline gasoline

Accuracy (%) 100 100

Detection time (min:sec) 10:13 06:42

Fall time (min:sec) 26:52 14:43

Lower detection limit (cm) 0.04 0.04

Specificity Results:

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

Comments:

EPA and many states require detection of 1/8 inch (0.32 cm) of product for groundwater monitoring.

Detector is reusable.

INCON Intelligent Controls, Inc. Evaluator: Carnegie Mellon Research Institute

74 Industrial Park Rd. Tel: (412) 268-3495

Saco, ME 04072

Tel: (800) 872-3455 Date of Evaluation: 02/19/96
168

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performance of the method or equipment.

Revision Date: April 18, 1997

Keekor Environmental Products

TankTite Leak Detection Kernel Version 1.0 with Keeprobe K7

(Magnetostrictive Probe)

AUTOMATIC TANK GAUGING SYSTEM

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

Leak Threshold: 0.1 gph. A leak is declared if the output of the measurement system equals or exceeds 

this threshold.

Applicability: Gasoline, diesel, aviation fuel, fuel oils #4 and #6, waste oil, and 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 85260

Tel: (602) 443-0001 Date of Evaluation: 10/25/94
169

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performance of the method or equipment.

Revision Date: April 18, 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 leak is declared if the output of the measurement system 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 leak is declared if the net change between the two tests is greater than 0.02 gph.

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

Tel: (617) 878-7766 Date of Evaluation: 11/29/91
170

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performance of the method or equipment.

Revision Date: April 18, 1997

Mallory Controls

Pollulert Probes MD221G/T, MD221G/TRA

LIQUID-PHASE OUT-OF-TANK PRODUCT DETECTOR

Detector:

Output type: qualitative

Sampling frequency: continuous

Operating principle: electrical conductivity

Test Results:

unleaded synthetic JP-4

gasoline gasoline jet fuel

Accuracy (%) 100 100 100

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:

Activated: unleaded gasoline, synthetic gasoline, n-hexane, diesel fuel, jet-A fuel, JP-4 jet fuel, toluene, 

xylene(s).

Comments:

EPA and many states require detection of 1/8 inch (0.32 cm) of product for groundwater monitoring.

Evaluation was conducted using probe FD221G/TRA. 

According to manufacturer, probes beginning with "MD" have identical performance as older probes beginning 

with "FD." 

Test procedures used were Radian Corporation's draft report "Development of Procedures to Assess

the Performance of External Leak Detection Devices: Liquid-Phase ASTM-Formatted Methods," 

June 29, 1990.

Detector is reusable.

Detector has been discontinued by manufacturer.

Mallory Controls Evaluator: Radian Corp.

2831 Waterfront Pkwy. E. Dr. Tel: (512) 454-4797

Indianapolis, IN 46214

Tel: Not Available Date of Evaluation: 07/08/91
171

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performance of the method or equipment.

Revision Date: April 18, 1997

Mallory Controls

Pollulert Probes MD241R, MD241RRA, MD241G, MD241GRA

LIQUID-PHASE OUT-OF-TANK PRODUCT DETECTOR

Detector:

Output type: qualitative

Sampling frequency: continuous

Operating principle: electrical conductivity

Test Results:

unleaded synthetic JP-4

gasoline gasoline jet fuel

Accuracy (%) 100 100 100

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

Specificity Results:

Activated: unleaded gasoline, synthetic gasoline, n-hexane, diesel fuel, jet-A fuel, JP-4 jet fuel, toluene, 

xylene (s).

Comments:

EPA and many states require detection of 1/8 inch (0.32 cm) of product for groundwater monitoring. Evaluation 

was conducted using probe FD241R. 

According to manufacturer, probes beginning with "MD" have identical performance as older probes beginning 

with "FD." 

Test procedures used were Radian Corporation's draft report "Development of Procedures to Assess the 

Performance of External Leak Detection Devices: Liquid-Phase ASTM-Formatted Methods," June 29, 1990.

Detector is reusable.

Detector has been discontinued by manufacturer.

Mallory Controls Evaluator: Radian Corp.

2831 Waterfront Pkwy. E. Dr. Tel: (512) 454-4797

Indianapolis, IN 46214

Tel: Not available Date of Evaluation: 07/08/91
172

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performance of the method or equipment.

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

Accuracy (%) 100 100 100

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:

Activated: unleaded gasoline, synthetic gasoline, JP-4 jet fuel, 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.” 

Test procedures used were Radian Corporation’s draft report “Development of Procedures to Assess the 

Performance of External Leak Detection Devices: Vapor-Phase ASTM-Formatted Methods,” June 29, 1990.

Detector has been discontinued by manufacturer.

Mallory Controls Evaluator: Radian Corp.

2831 Waterfront Pkwy. E. Dr. Tel: (512) 454-4797

Indianapolis, IN 46214

Tel: Not available. Date of Evaluation: 07/08/91
173

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performance of the method or equipment.

Revision Date: April 18, 1997

Marley Pump Co.

Red Jacket PPM 4000, RLM 9000, RLM 10000, ST 1401L, and ST1801L

AUTOMATIC ELECTRONIC LINE LEAK DETECTOR

Certification: Leak rate of 3.0 gph with PD=100% and PFA=0%. 

Leak Threshold: 2.0 gph. A leak is declared if the output of the measurement system

equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel and solvents.

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 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.

Recording and display of day, date, and time of positive test.

Dispenser 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.

Marley Pump Co. Evaluator: Ken Wilcox Associates

5800 Foxridge Dr. Tel: (816) 443-2494

Mission, KS 66202

Tel: (913) 813-5700 Date of Evaluation: 03/11/91, Rev. 04/94
174

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

performance of the method or equipment.

Revision Date: April 18, 1997

Marley Pump Co.

Red Jacket PPM 4000, RLM 9000, RLM 10000, ST 1401L, and ST1801L

AUTOMATIC ELECTRONIC LINE LEAK DETECTOR

Certification: Leak rate of 0.2 gph with PD=100% and PFA=0%. 

Leak Threshold: 0.1 gph. A leak is declared if the output of the measurement system equals or exceeds

this threshold. 

Applicability: Gasoline, diesel, aviation fuel and solvents.

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: Minimum of 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 to determine if pipeline is leaking.

Recording and display of day, date, and time of positive test.

Dispenser 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.

Marley Pump Co. Evaluator: Ken Wilcox Associates

5800 Foxridge Dr. Tel: (816) 443-2494

Mission, KS 66202

Tel: (913) 813-5700 Date of Evaluation: 03/11/91, Rev. 04/94
175

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

performance of the method or equipment.

Revision Date: April 18, 1997

Marley Pump Co.

Red Jacket PPM 4000, RLM 9000, RLM 10000, ST 1401L, and ST1801L

AUTOMATIC ELECTRONIC LINE LEAK DETECTOR

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

Leak Threshold: 0.047 gph. A leak is declared if the output of the measurement system equals or 

exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel and solvents.

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: Minimum of 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 positive test.

Dispenser 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.

Marley Pump Co. Evaluator: Ken Wilcox Associates

5800 Foxridge Dr. Tel: (816) 443-2494

Mission, KS 66202

Tel: (913) 813-5700 Date of Evaluation: 03/11/91, Rev. 04/94
176

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performance of the method or equipment.

Revision Date: April 18, 1997

Marley Pump Co.

Red Jacket DLD and 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 leak is declared if the output of the measurement

system equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel and 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

5800 Foxridge Dr. Tel: (816) 443-2494

Mission, KS 66202

Tel: (913) 813-5700 Date of Evaluation: 12/21/90
177

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performance of the method or equipment.

Revision Date: April 18, 1997

Marley Pump Co.

Red Jacket FX1/FX2

AUTOMATIC MECHANICAL LINE LEAK DETECTOR

Certification: Leak rate of 3.0 gph with PD=100% and PFA=0%.

Leak Threshold: 2.0 gph. A leak is declared if the output of the measurement system

equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel, and some solvents.

Specification: System tests pressurized fiberglass and steel pipelines. 

Tests are conducted at 8-12 psi. 

Pipeline Capacity: Maximum of 158 gallons.

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

5800 Foxridge Dr. Tel: (816) 443-2494

Mission, KS 66202

Tel: (913) 813-5700 Date of Evaluation: 03/14/94
178

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performance of the method or equipment.

Revision Date: April 18, 1997

Marley Pump Co.

Red Jacket FX1/FX2 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 leak is declared if the output of the measurement system

equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel, and 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

5800 Foxridge Dr. Tel: (816) 443-2494

Mission, KS 66202

Tel: (913) 813-5700 Date of Evaluation: 03/22/94
179

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performance of the method or equipment.

Revision Date: April 18, 1997

Marley Pump Co.

Red Jacket FX2/FX2-D and Bigflo

AUTOMATIC MECHANICAL LINE LEAK DETECTOR

Certification: Leak rate of 3.0 gph with PD=100% and PFA=0%.

Leak Threshold: 2.0 gph. A leak is declared if the output of the measurement system

equals or exceeds this threshold. 

Applicability: Gasoline, diesel.

Specification: System tests pressurized fiberglass and steel pipelines. 

Tests are conducted at 8-12 psi. 

Pipeline Capacity: Maximum of 362 gallons.

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 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

5800 Foxridge Dr. Tel: (816) 443-2494

Mission, KS 66202

Tel: (913) 813-5700 Dates of Evaluation: 3/15/94 and 6/1/94
180

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performance of the method or equipment.

Revision Date: April 18, 1997

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 leak is declared if the output of the measurement system

equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel and 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

5800 Foxridge Dr. Tel: (816) 443-2494

Mission, KS 66202

Tel: (913) 813-5700 Date of Evaluation: 12/21/90
181

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performance of the method or equipment.

Revision Date: April 18, 1997

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 leak is declared if the output of the measurement system

equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel and 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

5800 Foxridge Dr. Tel: (816) 443-2494

Mission, KS 66202

Tel: (913) 813-5700 Date of Evaluation: 04/19/93
182

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performance of the method or equipment.

Revision Date: April 18, 1997

Marley Pump Co.

Red Jacket ATM System, 

Version RLM 5000, 5001, and 9000

(Magnetostrictive Probe)

AUTOMATIC TANK GAUGING SYSTEM

Certification: Leak rate of 0.2 gph with PD=100% and PFA=0%. 

Leak Threshold: 0.1 gph. A leak is declared if the output of the measurement system equals or exceeds

this threshold. 

Applicability: Gasoline, diesel, aviation fuel, and 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

5800 Foxridge Dr. Tel: (816) 443-2494

Mission, KS 66202

Tel: (913) 813-5700 Date of Evaluation: 04/02/91
183

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performance of the method or equipment.

Revision Date: April 18, 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 SYSTEM

Certification: Leak rate of 0.2 gph with PD=100% and PFA=0%. 

Leak Threshold: 0.1 gph. A leak is declared if the output of the system equals or exceeds this threshold.

Applicability: Gasoline, diesel, aviation fuel, and 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

5800 Foxridge Dr. Tel: (303) 792-5615

Mission, KS 66202

Tel: (913) 813-5700 Date of Evaluation: 09/30/92
184

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performance of the method or equipment.

Revision Date: April 18, 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 SYSTEM

Marley Pump Co.

Certification: Leak rate of 0.1 gph with PD=99.9% and PFA=0.01%. 

Leak Threshold: 0.05 gph. A leak is declared if the output of the system equals or exceeds this 

threshold.

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

5800 Foxridge Dr. Tel: (303) 792-5615

Mission, KS 66202

Tel: (913) 813-5700 Date of Evaluation: 09/25/92
185

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performance of the method or equipment.

Revision Date: April 18, 1997

Marley Pump Co.

Red Jacket PPM 4000 with Optical Liquid Discrimination Sensor

LIQUID-PHASE INTERSTITIAL DETECTOR

Detector:

Output type: qualitative

Sampling frequency: continuous

Operating principle: optical sensor

Test Results: *

unleaded synthetic diesel heating

gasoline fuel fuel oil #2 water

Accuracy (%) 100 100 100 100 100

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

*At a flow rate of 0.13 gal/hr in a 4.8 cm diameter test chamber.

** See glossary.

Specificity Results:

Activated: unleaded gasoline, diesel fuel, synthetic fuel, heating oil #2, water.

Manufacturer’s specifications:

Manufacturer's instructions do not specify procedures or schedules for maintenance or calibration.

Comments:

EPA and many states require detection of 1/8 inch (0.32 cm) of product for groundwater monitoring. 

Detector is listed as interstitial due to intended use. 

Test procedures used were Carnegie Mellon Research Institute's "Test Procedures for Third Party Evaluation of 

Leak Detection Methods: Point Sensor Liquid Contact Leak Detection Systems": Final Report - November 11, 

1991. 

Evaluation lists all PPM, RLM, and ST models, including the Multiplexer Unit; however, evaluation procedures 

were performed using model PPM 4000. 

Detector is reusable.

Marley Pump Co. Evaluator: Carnegie Mellon Research Institute

9650 Alden Rd. Tel: (412) 268-3495

Lenexa, KS 66215

Tel: (913) 541-2985 Date of Evaluation: 04/28/92
186

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performance of the method or equipment.

 Revision Date: April 18, 1997

Mine Safety Appliances

Tankgard

P/N 481532 S/N 03095

VAPOR-PHASE OUT-OF-TANK PRODUCT DETECTOR

Detector:

Output type: quantitative

Sampling frequency: continuous

Operating principle: metal oxide semiconductor

Test Results:

benzene 2-methylbutane

Accuracy (%) 100 100

Detection time (sec) 5 16

Fall time (min:sec) 04:12 04:42

Lower detection limit (ppm) 12.5 12.5

Specificity Results:

Activated (100%): benzene, n-butane, n-hexane, 2-methylpentane, toluene, isobutane.

Manufacturer’s specifications:

Maximum Wire Distance: 500 ft using 18 AWG

Response Time: 30 seconds

Recover 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

Tel: (412) 776-8600 Date of Evaluation: 03/26/91
187

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performance of the method or equipment.

 Revision Date: April 18, 1997

Mine Safety Appliances

Tankgard VIII

P/N 488803 S/N 00389

VAPOR-PHASE OUT-OF-TANK PRODUCT DETECTOR

Detector:

Output type: quantitative

Sampling frequency: continuous

Operating principle: metal oxide semiconductor

Test Results:

benzene 2-methylbutane

Accuracy (%) 100 100

Detection time (sec) 5 16

Fall time (min:sec) 04:12 04:42

Lower detection limit (ppm) 12.5 12.5

Specificity Results:

Activated (100%): benzene, n-butane, n-hexane, 2-methylpentane, toluene, isobutane.

Manufacturer’s specifications:

Maximum Wire Distance: 500 ft using 18 AWG.

Response Time: 30 seconds.

Recover 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

Tel: (412) 776-8600 Date of Evaluation: 03/28/91
188

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performance of the method or equipment.

Revision Date: April 18, 1997

NDE Environmental Corp.

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 leak is declared if the output of the measurement system equals or exceeds

this threshold. 

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

NDE Environmental Corp. Evaluator: Midwest Research Institute

8906 Wall St., Suite 306 Tel: (816) 753-7600

Austin, TX 78754

Tel: (800) 800-4633 Date of Evaluation: 08/30/91
189

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performance of the method or equipment.

Revision Date: April 18, 1997

NDE Environmental Corp.

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 leak is declared if the output of the measurement system equals or exceeds 

this threshold. 

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

NDE Environmental Corp. Evaluator: Midwest Research Institute

8906 Wall St., Suite 306 Tel: (816) 753-7600

Austin, TX 78754

Tel: (800) 800-4633 Date of Evaluation: 02/14/91
190

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performance of the method or equipment.

Revision Date: April 18, 1997

NDE Environmental Corp.

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 leak is declared when the pressure decay trend equals or exceeds ± 0.016 psi/hr.

Applicability: Gasoline, diesel, aviation fuel, heavy fuel oils #2 through #6, and 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 underfilled test method.

NDE Environmental Corp. Evaluator: ADA Technologies, Inc.

8906 Wall St., Suite 306 Tel: (303) 792-5615

Austin, TX 78754

Tel: (800) 800-4633 Date of Evaluation: 04/10/92
191

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performance of the method or equipment.

Revision Date: April 18, 1997

NDE Environmental Corp.

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 leak is declared 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, and 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 underfilled test method.

NDE Environmental Corp. Evaluator: Midwest Research Institute

8906 Wall St., Suite 306 Tel: (816) 753-7600

Austin, TX 78754

Tel: (800) 800-4633 Date of Evaluation: 12/04/92
192

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performance of the method or equipment.

 Revision Date: April 18, 1997

NDE Environmental Corp.

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 leak is declared 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, and 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 underfilled 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.

NDE Environmental Corp. Evaluator: Ken Wilcox Associates

8906 Wall St., Suite 306 Tel: (816) 443-2494

Austin, TX 78754

Tel: (800) 800-4633 Date of Evaluation: 01/15/93
193

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performance of the method or equipment.

Revision Date: April 18, 1997

NDE Environmental Corp.

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 leak is declared if the output of the measurement system equals or 

exceeds this threshold. 

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

NDE Environmental Corp. Evaluator: Ken Wilcox Assoc.

8906 Wall St., Suite 306 Tel: (816) 443-2494

Austin, TX 78754

Tel: (800) 800-4633 Date of Evaluation: 02/15/93
194

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

performance of the method or equipment.

Revision Date: April 18, 1997

NDE Environmental Corp.

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 leak is declared if the output of the measurement system equals or exceeds 

this threshold. 

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

NDE Environmental Corp. Evaluator: ADA Technologies

8906 Wall St., Suite 306 Tel: (303) 792-5615

Austin, TX 78754

Tel: (800) 800-4633 Date of Evaluation: 09/09/92
195

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performance of the method or equipment.

 Revision Date: April 18, 1997

Omntec/Electro Levels Mfg., Inc.

OEL 8000

 (Magnetostrictive Probe)

AUTOMATIC TANK GAUGING SYSTEM

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

Leak Threshold: 0.1 gph. A leak is declared if the output of the measurement system equals or exceeds

this threshold.

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

Tel: (516) 981-2001 Date of Evaluation: 01/17/96
196

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

performance of the method or equipment.

 Revision Date: April 18, 1997

Omntec/Electro Levels Mfg., Inc.

OEL 8000

 (Magnetostrictive Probe)

AUTOMATIC TANK GAUGING SYSTEM

Certification: Leak rate of 0.1 gph with PD=97.8% and PFA=2.2%.

Leak Threshold: 0.05 gph. A leak is declared if the output of the measurement system 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

Tel: (516) 981-2001 Date of Evaluation: 01/17/96
197

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

performance of the method or equipment.

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: all: refractive index of liquids; PDS-ASC, PDWS-1, and PDWF-1: also electrical conductivity

Test Results:

L-LL-R-1 (low level) L-LL-R-1 (high level)

unleaded

gasoline diesel fuel water

unleaded

gasoline diesel fuel water

Accuracy (%) 100 100 100 100 100 100

Detection time (sec) < 1 < 1 < 1 < 1 < 1 < 1

Fall time (sec) < 1 < 1 < 1 < 1 < 1 < 1

Lower detection limit (cm) 6.63 6.53 6.45 21.7 21.8 21.7

PDWS-1 PDWF-1

unleaded

gasoline diesel fuel water

unleaded

gasoline diesel fuel water

Accuracy (%) 100 100 100 100 100 100

Detection time (sec) < 1 < 1 < 1 < 1 < 1 < 1

Fall time (sec) < 1 < 1 < 1 < 1 < 1 < 1

Lower detection limit (cm) 1.93 1.85 1.63 1.60 1.67 1.02

PDS-ASC/LS-ASC

unleaded

gasoline diesel fuel water

Accuracy (%) 100 100 100

Detection time (sec) < 1 < 1 < 1

Fall time (sec) < 1 < 1 < 1

Lower detection limit (cm) 2.24 2.11 1.42

Specificity Results:

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

Manufacturer’s specifications:

LS and PD series responds to any liquid with an index of refraction different than air. PD series responds to any conducting liquid.

Comments:

EPA and many states require detection of 1/8 inch (0.32 cm) of product for groundwater monitoring. 

Detectors are listed as interstitial due to intended use. 

Test procedures used were modified from EPA’s “Standard Test Procedures for Evaluating Leak Detection Methods: Liquid-Phase Outof-Tank Product Detectors,” March 1990, and EPA’s “Standard Test Procedures for Evaluating Leak Detection Methods: NonVolumetric Tank Tightness Test Methods,” March 1990.

Detector is reusable. 

Omntec/Electro Levels Mfg., Inc. Evaluator: Ken Wilcox Associates
198

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

performance of the method or equipment.

1993 Pond Rd. Tel: (816) 443-2494

Ronkonkoma, NY 11779

Tel: (516) 467-5787 Date of Evaluation: 06/12/93
199

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

performance of the method or equipment.

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 synthetic 

gasoline gasoline

Accuracy (%) 100 100 

Detection time (hr:min:sec) 00:05:41 00:05:14

Fall time (hr:min:sec) 00:30:39 00:18:36

Lower detection limit (cm) 0.02 0.02

Specificity Results:

Activated: unleaded gasoline, synthetic gasoline, 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:

EPA and many states require detection of 1/8 inch (0.32 cm) of product for groundwater monitoring. 

Detector is reusable.

One Plus Corp. Evaluator: Underwriters Laboratories Inc.

1955 Shermer Rd., Suite 100 Tel: (847) 272-8800

Northbrook, IL 60062

Tel: (708) 498-0955 Date of Evaluation: 12/17/91
200

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performance of the method or equipment.

 Revision Date: April 18, 1997

Patriot Sensors and Controls Corp. (formerly MagneTek)

7021 Digital Tank Gauge

(7030 Series Magnetostrictive Probe)

AUTOMATIC TANK GAUGING SYSTEM

Certification: Leak rate of 0.2 gph with PD = 99.96% and PFA = 0.044%.

Leak Threshold: 0.1 gph. A leak is declared if the output of the measurement system equals or exceeds 

this threshold.

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

Tel: (810) 435-0700 Date of Evaluation: 02/07/91
201

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performance of the method or equipment.

Revision Date: April 18, 1997

Patriot Sensors and Controls Corp. (formerly MagneTek)

7021 Digital Tank Gauge

(7030 Series Magnetostrictive Probe)

AUTOMATIC TANK GAUGING SYSTEM

Certification: Leak rate of 0.1 gph with PD = 95.34% and PFA = 4.66%.

Leak Threshold: 0.05 gph. A leak is declared if the output of the measurement system

equals or exceeds this threshold.

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

Tel: (810) 435-0700 Date of Evaluation: 02/07/91
202

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

performance of the method or equipment.

Revision Date: April 18, 1997

Patriot Sensors and Controls Corp. (formerly MagneTek)

7021 Digital Tank Gauge

(7100 Series Magnetostrictive Probe)

AUTOMATIC TANK GAUGING SYSTEM

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

Leak Threshold: 0.1 gph. A leak is declared if the output of the measurement system equals or exceeds 

this threshold.

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

Tel: (810) 435-0700 Date of Evaluation: 03/14/95
203

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

performance of the method or equipment.

 Revision Date: April 18, 1997

Patriot Sensors and Controls Corp. (formerly MagneTek)

7021 Digital Tank Gauge

(7100 Series Magnetostrictive Probe)

AUTOMATIC TANK GAUGING SYSTEM

Certification: Leak rate of 0.1 gph with PD = 99.6% and PFA = 0.4%.

Leak Threshold: 0.05 gph. A leak is declared if the output of the measurement system equals or exceeds 

this threshold.

Applicability: Gasoline, diesel, aviation fuel, fuel oil #4, waste oil, solvents and other substances with a

specific gravity >0.6 and a viscosity <1500 cp 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.

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

Tel: (810) 435-0700 Date of Evaluation: 03/14/95
204

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

performance of the method or equipment.

Revision Date: April 18, 1997

PermAlert

PAL-AT Models AT20C, AT50C, AT40K

AGW Sensor Cable

LIQUID-PHASE OUT-OF-TANK PRODUCT DETECTOR

Detector:

Output type: qualitative

Sampling frequency: continuous

Operating principle: impedance change

Test Results: *

unleaded gasoline

1/3 MER** 2/3 MER MER

1348 ft. 2644 ft. 3982 ft.

Accuracy (%) 100 100 100

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

*At a flow rate of 0.14 gal/hr in test chamber.

** See glossary.

Specificity Results:

Activated: diesel fuel, synthetic fuel, heating oil #2, water.

Comments:

EPA and many states require detection of 1/8 inch (0.32 cm) of product for groundwater monitoring. 

System can monitor interstitial spaces. 

Test procedures used were Carnegie Mellon Research Institute's "Test Procedures for Third Party Evaluation of 

Leak Detection Methods: Cable Sensor Liquid Contact Leak Detection Systems": Final Report - November 11, 

1991. 

Evaluation also covered quantitative leak location.

Detector is reusable.

PermAlert Evaluator: Carnegie Mellon Research Institute

7720 N. Lehigh Ave. Tel: (412) 268-3495

Niles, IL 60714-3491

Tel: (708) 966-2190 Date of Evaluation: 01/17/92
205

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performance of the method or equipment.

Revision Date: April 18, 1997

PermAlert

PAL-AT Models AT20C, AT50C, AT40K

with PHFW Hydrocarbon Probe and Type 1 Sensor

LIQUID-PHASE OUT-OF-TANK PRODUCT DETECTOR

Detector:

Output type: qualitative

Sampling frequency: continuous

Operating principle: product soluble

Test Results:

unleaded synthetic 

gasoline gasoline

Accuracy (%) 100 100

Detection time (min:sec) 00:24 00:09

Fall time (min:sec) N/A* N/A

Lower detection limit (cm) 0.01 0.01

* See glossary.

Specificity Results:

Activated: unleaded gasoline, synthetic gasoline, 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:

EPA and many states require detection of 1/8 inch (0.32 cm) of product for groundwater monitoring. 

Detector is 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

Tel: (708) 966-2190 Date of Evaluation: 09/15/92
206

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

performance of the method or equipment.

Revision Date: April 18, 1997

PermAlert

PAL-AT Models AT20C, AT50C, AT40K

with PHFW Hydrocarbon Probe and Type 2 Sensor

LIQUID-PHASE OUT-OF-TANK PRODUCT DETECTOR

Detector:

Output type: qualitative

Sampling frequency: continuous

Operating principle: product soluble

Test Results:

unleaded synthetic 

gasoline gasoline

Accuracy (%) 100 100

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

Fall time (min:sec) N/A* N/A

Lower detection limit (cm) 0.01 0.01

* See glossary.

Specificity Results:

Activated: unleaded gasoline, synthetic gasoline, 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:

EPA and many states require detection of 1/8 inch (0.32 cm) of product for groundwater monitoring. 

Detector is 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

Tel: (708) 966-2190 Date of Evaluation: 09/15/92
207

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

performance of the method or equipment.

 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

Accuracy (%) 100

Response time (min) 1.13

Recovery time (min) 8.83

Product activation height (cm) 0.53

Lower detection limit (cm) 0.38

*At a flow rate of 0.13 gal/hr in a 4.8 cm diameter test chamber.

Specificity Results:

Activated: diesel fuel, synthetic fuel, heating oil #2.

Not activated: water.

Comments:

Test procedures used were Carnegie Mellon Research Institute's "Test Procedures for Third Party 

Evaluation of Leak Detection Methods: Point Sensor Liquid Contact Leak Detection Systems": 

Final Report - November 11, 1991.

Detector is reusable.

PermAlert Evaluator: Carnegie Mellon Research Institute

7720 N. Lehigh Ave. Tel: (412) 268-3495

Niles, IL 60714-3491

Tel: (708) 966-2190 Date of Evaluation: 02/05/92
208

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

performance of the method or equipment.

Revision Date: April 18, 1997

PermAlert

PAL-AT Models AT20C, AT50C, AT40K

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

1/3 MER** 2/3 MER MER

1368 ft. 2685 ft. 4046 ft.

Accuracy (%) 100 100 100

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 act. height N/D** N/D 3.6

 Detection length N/D N/D 152.9

*At a flow rate of 0.16 gal/hr in test chamber.

** See glossary.

Specificity Results:

Activated: diesel fuel, synthetic fuel, heating oil #2.

Not Activated: water.

Comments:

EPA and many states require detection of 1/8 inch (0.32 cm) of product for groundwater monitoring. 

System can monitor interstitial spaces. 

Test procedures used were Carnegie Mellon Research Institute's "Test Procedures for Third Party Evaluation of 

Leak Detection Methods: Cable Sensor Liquid Contact Leak Detection Systems": Final Report - November 11, 

1991. 

Evaluation also covered quantitative leak location.

PermAlert Evaluator: Carnegie Mellon Research Institute

7720 N. Lehigh Ave. Tel: (412) 268-3495

Niles, IL 60714-3491

Tel: (708) 966-2190 Date of Evaluation: 02/11/92
209

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

performance of the method or equipment.

Revision Date: April 18, 1997

PermAlert

TankWatch Models PHM10, PHMS

Combination Hydrocarbon/Water Probe

LIQUID-PHASE INTERSTITIAL DETECTOR

Detector:

Output type: qualitative

Sampling frequency: continuous

Operating principle: electrical conductivity

Test Results: *

unleaded

gasoline water

Accuracy (%) 100 100

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

*At a flow rate of 0.13 gal/hr in a 4.8 cm diameter test chamber.

Specificity Results:

Activated: diesel fuel, synthetic fuel, heating oil #2.

Comments:

Test procedures used were Carnegie Mellon Research Institute's "Test Procedures for Third Party 

Evaluation of Leak Detection Methods: Point Sensor Liquid Contact Leak Detection Systems": 

Final Report - November 11, 1991.

Detector is reusable.

PermAlert Evaluator: Carnegie Mellon Research Institute

7720 N. Lehigh Ave. Tel: (412) 268-3495

Niles, IL 60714-3491

Tel: (708) 966-2190 Date of Evaluation: 06/16/92
210

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

performance of the method or equipment.

Revision Date: April 18, 1997

PermAlert

TankWatch Models PHM10, PHMS

Hydrocarbon Probe

LIQUID-PHASE INTERSTITIAL DETECTOR

Detector:

Output type: qualitative

Sampling frequency: continuous

Operating principle: electrical conductivity

Test Results: *

unleaded

gasoline

Accuracy (%) 100

Response time (min) 0.25

Recovery time (min) 2.33

Product activation height (cm) 0.17

Lower detection limit (cm) 0.38

*At a flow rate of 0.14 gal/hr in a 4.8 cm diameter test chamber.

Specificity Results:

Activated: diesel fuel, synthetic fuel, heating oil #2.

Not activated: water.

Comments:

Test procedures used were Carnegie Mellon Research Institute's "Test Procedures for Third Party 

Evaluation of Leak Detection Methods: Point Sensor Liquid Contact Leak Detection Systems": 

Final Report - November 11, 1991.

Detector is reusable.

PermAlert Evaluator: Carnegie Mellon Research Institute

7720 N. Lehigh Ave. Tel: (412) 268-3495

Niles, IL 60714-3491

Tel: (708) 966-2190 Date of Evaluation: 06/16/92
211

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performance of the method or equipment.

Revision Date: April 18, 1997

Petro Vend, Inc.

Petrosonic III

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

AUTOMATIC TANK GAUGING SYSTEM

Certification: Leak rate of 0.2 gph with PD=99.07% and PFA=0.93%.

Leak Threshold: 0.1 gph. A leak is declared if the output of the measurement system

equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel, and 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

Tel: (708) 485-4200 Date of Evaluation: 11/04/94
212

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performance of the method or equipment.

Revision Date: April 18, 1997

Petro Vend, Inc.

Site Sentinel Model II and III

 (Model 613, 2 inch, Magnetostrictive Probe)

AUTOMATIC TANK GAUGING SYSTEM

Certification: Leak rate of 0.2 gph with PD=96.55% and PFA=3.45%.

Leak Threshold: 0.1 gph. A leak is declared if the output of the measurement system

equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel, and 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

Tel: (708) 485-4200 Date of Evaluation: 11/04/94
213

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performance of the method or equipment.

Revision Date: April 18, 1997

Petro Vend, Inc.

Site Sentinel Model II and III,

(Model 613, 4 inch, Magnetostrictive Probe)

AUTOMATIC TANK GAUGING SYSTEM

Certification: Leak rate of 0.2 gph with PD=99.82% and PFA=0.18%.

Leak Threshold: 0.1 gph. A leak is declared if the output of the measurement system

equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel, and 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

Tel: (708) 485-4200 Date of Evaluation: 11/04/94
214

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performance of the method or equipment.

Revision Date: April 18, 1997

Petro Vend, Inc.

Site Sentinel Model II and III,

(Model 613, 4 inch, Magnetostrictive Probe)

AUTOMATIC TANK GAUGING SYSTEM

Certification: Leak rate of 0.1 gph with PD=99.95% and PFA=0.35%.

Leak Threshold: 0.06 gph. A leak is declared if the output of the measurement system

equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel, and 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

Tel: (708) 485-4200 Date of Evaluation: 11/04/94
215

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performance of the method or equipment.

Revision Date: April 18, 1997

Petro Vend, Inc.

Petrosentry IV, Petrosentry VIII, SiteSentinel 

Liquid Sensor

LIQUID-PHASE INTERSTITIAL DETECTOR

Detector:

Output type: qualitative

Sampling frequency: continuous

Operating principle: thermal conductivity

Test Results: *

unleaded

gasoline

Accuracy (%) 100

Response time (min) 0.51

Recovery time (min) <1

Product activation height (cm) 0.35

Lower detection limit (cm) 0.76

*At a flow rate of 0.14 gal/hr in a 4.8 cm diameter test chamber.

Specificity Results:

Activated: diesel fuel, synthetic fuel, heating oil #2, water.

Comments:

Test procedures used were Carnegie Mellon Research Institute's "Test Procedures for Third Party 

Evaluation of Leak Detection Methods: Point Sensor Liquid Contact Leak Detection Systems": 

Final Report - November 11, 1991.

Detector is reusable.

Petro Vend, Inc. Evaluator: Carnegie Mellon Research Institute

6900 Santa Fe Dr. Tel: (412) 268-3495

Hodgkins, IL 60525-9909

Tel: (708) 485-4200 Date of Evaluation: 10/15/92
216

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performance of the method or equipment.

Revision Date: April 18, 1997

Petro Vend, Inc.

Petrosentry IV, Petrosentry VIII, SiteSentinel 

Universal Reservoir Sensor

LIQUID-PHASE INTERSTITIAL DETECTOR

Detector:

Output type: qualitative

Sampling frequency: continuous

Operating principle: float switch

Test Results: *

50 wt% Ethylene glycol in water 30 wt% Calcium chloride in water

Up Down Up Down

Accuracy (%) 100 100 100 100

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

 

*At a flow rate of 0.21 gal/hr in test chamber.

Specificity Results:

Not applicable

Comments:

Intended to monitor level of either ethylene glycol or calcium chloride solutions in the interstitial or annular space 

of a double-walled tank. 

Activates an alarm if any significant gain or loss of solution occurs. 

Test procedures used were modified by evaluator from Carnegie Mellon Research Institute's "Test Procedures for 

Third Party Evaluation of Leak Detection Methods: Point Sensor Liquid Contact Leak Detection 

Systems": Final Report - November 11, 1991.

Detector is reusable.

Petro Vend, Inc. Evaluator: Carnegie Mellon Research Institute

6900 Santa Fe Dr. Tel: (412) 268-3495

Hodgkins, IL 60525-9909

Tel: (708) 485-4200 Date of Evaluation: 10/15/92
217

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performance of the method or equipment.

Revision Date: April 18, 1997

Petro Vend, Inc.

Petrosentry IV, Petrosentry VIII, SiteSentinel 

Universal Sump Sensor

LIQUID-PHASE INTERSTITIAL DETECTOR

Detector:

Output type: qualitative

Sampling frequency: continuous

Operating principle: float switch

Test Results: *

unleaded

gasoline

Accuracy (%) 100

Response time (min) 8.32

Recovery time (min) <1

Product activation height (cm) 3.37

Lower detection limit (cm) 3.97

*At a flow rate of 0.20 gal/hr in a 7.8 cm diameter test chamber.

Specificity Results:

Activated: diesel fuel, synthetic fuel, heating oil #2, water.

Comments:

Test procedures used were Carnegie Mellon Research Institute's "Test Procedures for Third Party 

Evaluation of Leak Detection Methods: Point Sensor Liquid Contact Leak Detection Systems": 

Final Report - November 11, 1991.

Detector is reusable.

Petro Vend, Inc. Evaluator: Carnegie Mellon Research Institute

6900 Santa Fe Dr. Tel: (412) 268-3495

Hodgkins, IL 60525-9909

Tel: (708) 485-4200 Date of Evaluation: 10/15/92
218

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performance of the method or equipment.

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 synthetic 

gasoline gasoline

Accuracy (%) 100 100

Detection time (hr:min:sec) 00:01:41 00:05:14

Fall time (hr:min:sec) 07:28:44 00:18:36

Lower detection limit (cm) 0.02 0.02

Specificity Results:

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

Manufacturer’s specifications:

Conductive polymer.

Comments:

EPA and many states require detection of 1/8 inch (0.32 cm) of product for groundwater monitoring. 

Detector is reusable. 

Petro Vend, Inc. Evaluator: Underwriters Laboratories, Inc.

6900 Santa Fe Dr. Tel: (847) 272-8800

Hodgkins, IL 60525-9909

Tel: (708) 485-4200 Date of Evaluation: 12/10/92
219

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performance of the method or equipment.

Revision Date: April 18, 1997

Petro Vend, Inc.

Petrosentry TLD III

VAPOR-PHASE OUT-OF-TANK PRODUCT DETECTOR

Detector:

Output type: qualitative

Sampling frequency: continuous

Operating principle: metal oxide semiconductor

Test Results:

benzene 2-methylbutane

Accuracy (%) 100 100

Detection time (min:sec) 00:05 00:16

Fall time (min:sec) 04:12 00:42

Lower detection limit (ppm) 12.5 12.5

Specificity Results:

Activated: benzene, n-butane, n-hexane, isobutane, 2-methylpentane, toluene.

Manufacturer’s specifications:

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

Tel: (708) 485-4200 Date of Evaluation: 03/26/91
220

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performance of the method or equipment.

Revision Date: April 18, 1997

Petro Vend, Inc.

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:

unleaded synthetic JP-4 

gasoline gasoline jet fuel

Accuracy* (%) 100 100 100

Detection time* (min:sec) 00:05 00:07 00:10

Fall time* (min:sec) 06:30 03:35 04:26

Lower detection limit (ppm) 10 10 10

 

*For tests conducted with 1000 ppm of test gas.

Specificity Results:

Activated: unleaded gasoline, synthetic gasoline, n-hexane, JP-4 jet fuel, toluene, xylene(s).

Comments:

Test procedures used were Radian Corporation's draft report "Development of Procedures to 

Assess the Performance of External Leak Detection Devices: Vapor-Phase ASTMFormatted Methods," June 29, 1990.

Petro Vend, Inc. Evaluator: Carnegie Mellon Research Institute

6900 Santa Fe Dr. Tel: (412) 268-3495

Hodgkins, IL 60525-9909

Tel: (708) 485-4200 Date of Evaluation: 04/16/92
221

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performance of the method or equipment.

 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 LS600LDBN LS610

unleaded

gasoline diesel wate

r

unleaded

gasoline diesel wate

r

unleaded

 gasoline diesel water

Accuracy (%) 100 100 100 100 100 100 100 100 100

Detection time (sec) <1 <1 <1 <1 <1 <1 <1 <1 <1

Fall time (sec) <1 <1 <1 <1 <1 <1 <1 <1 <1

Lower detection limit (in) 3.32 3.28 3.18 0.99 0.97 0.87 0.44 0.43 0.42

RSU800 (low level) RSU800 (high level)

unleaded

gasoline diesel water

unleaded

gasoline diesel water

Accuracy (%) 100 100 100 100 100 100

Detection time (min) <1 <1 <1 <1 <1 <1

Fall time (min) <1 <1 <1 <1 <1 <1

Lower detection limit (ppm) 2.57 2.53 2.31 13.31 13.24 13.01

Specificity Results:

Activated: unleaded gasoline, diesel fuel, water.

Manufacturer and evaluator claim sensor will respond to any liquid.

Comments:

Test procedures used were modified by evaluator from EPA's "Standard Test Procedures for Evaluating Leak 

Detection Methods: Liquid-Phase Out-of-Tank Product Detectors" and from EPA's "Standard Test Procedures 

for Evaluating Leak Detection Methods: Nonvolumetric Tank Tightness Testing Methods."

Detector is reusable.

Pneumercator Company, Inc. Evaluator: Ken Wilcox Associates

120 Finn Court Tel: (816) 443-2494

Farmingdale, NY 11735
222

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performance of the method or equipment.

Tel: (516) 293-8450 Date of Evaluation: 01/22/96
223

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performance of the method or equipment.

 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 synthetic

gasoline gasoline

Accuracy (%) 100 100

Detection time (min:sec) <00:01 <00:01

Fall time (hr:min:sec) 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:

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

Comments:

EPA and many states require detection of 1/8 inch (0.32 cm) of product for groundwater monitoring. 

Test procedures used were a combination of EPA's "Standard Test Procedures for Evaluating Leak Detection 

Methods: Liquid-Phase Out-of-Tank Product Detectors" and EPA's "Standard Test Procedures for Evaluating 

Leak Detection Methods: Nonvolumetric Tank Tightness Testing Methods."

Detector is reusable.

Pneumercator Company, Inc. Evaluator: Ken Wilcox Associates

120 Finn Court Tel: (816) 443-2494

Farmingdale, NY 11735

Tel: (516) 293-8450 Date of Evaluation: 12/14/93
224

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performance of the method or equipment.

Revision Date: April 18, 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 leak is declared if the output of the measurement system equals or exceeds 

this threshold. 

Applicability: Gasoline, diesel, aviation fuel, and fuel oil, and 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

Tel: (800) 438-1111 Date of Evaluation: 02/14/91
225

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performance of the method or equipment.

Revision Date: April 18, 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 leak is declared if the output of the measurement system equals or exceeds 

this threshold. 

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

Tel: (800) 438-1111 Date of Evaluation: 08/30/91
226

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performance of the method or equipment.

 Revision Date: April 18, 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 leak is declared 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, and 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 underfilled 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

Tel: (800) 438-1111 Date of Evaluation: 01/15/93
227

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performance of the method or equipment.

Revision Date: April 18, 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 leak is declared 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, and 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 underfilled test method.

ProTank, Inc. Evaluator: Midwest Research Institute

3545 Lomita Blvd., Suite G Tel: (816) 753-7600

Torrance, CA 90505

Tel: (800) 438-1111 Date of Evaluation: 12/04/92
228

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performance of the method or equipment.

Revision Date: April 18, 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 leak is declared when the pressure decay trend equals or exceeds ± 0.016 psi/hr.

Applicability: Gasoline, diesel, aviation fuel, heavy fuel oils #2 through #6, and 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 underfilled test method.

ProTank, Inc. Evaluator: ADA Technologies, Inc.

3545 Lomita Blvd., Suite G Tel: (303) 792-5615

Torrance, CA 90505

Tel: (800) 438-1111 Date of Evaluation: 04/10/92
229

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performance of the method or equipment.

 Revision Date: April 18, 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 leak is declared if the output of the measurement system equals or 

exceeds this threshold. 

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

Tel: (800) 438-1111 Date of Evaluation: 02/15/93
230

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

performance of the method or equipment.

Revision Date: April 18, 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 leak is declared if the output of the measurement system equals or exceeds 

this threshold. 

Applicability: Gasoline, diesel, aviation fuel, fuel oil, waste oil, and 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

Tel: (800) 438-1111 Date of Evaluation: 09/09/92
231

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

performance of the method or equipment.

Revision Date: April 18, 1997

Raychem Corp.

TraceTek Alarm and Locator Modules 

TT502 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

1/3 MER** 2/3 MER MER

334 m 665 m 995 m

Accuracy (%) 100 100 100

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 act. height N/D** N/D 0.77

 Detection length N/D N/D 10

 

*At a flow rate of 0.17 gal/hr in test chamber.

** See glossary.

Specificity Results:

Activated: diesel fuel, synthetic fuel, heating oil #2.

Not Activated: water.

Comments:

EPA and many states require detection of 1/8 inch (0.32 cm) of product for groundwater monitoring. 

Test procedures used were Carnegie Mellon Research Institute's "Test Procedures for Third Party 

Evaluation of Leak Detection Methods: Cable Sensor Liquid Contact Leak Detection Systems": Final Report -

November 11, 1991. 

Evaluation also covered quantitative leak location.

Raychem Corp. Evaluator: Carnegie Mellon Research Institute

300 Constitution Dr. Tel: (412) 268-3495

Menlo Park, CA 94025-1164

Tel: (415) 361-3333 Date of Evaluation: 05/15/92
232

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

performance of the method or equipment.

Revision Date: April 18, 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 3.0 gph with PD=100% and PFA=0%.

Leak Threshold: 0.831 gph. A leak is declared if the output of the measurement system

equals or exceeds this threshold. 

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

Dispenser 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 91367

Tel: (818) 883-5211 Date of Evaluation: 10/04/91
233

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

performance of the method or equipment.

Revision Date: April 18, 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 leak is declared if the output of the measurement system equals or 

exceeds this threshold. 

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

Dispenser 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 91367

Tel: (818) 883-5211 Date of Evaluation: 10/04/91
234

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

performance of the method or equipment.

Revision Date: April 18, 1997

Ronan Engineering Co.

X-76 ETM and X-76 ETM-4X

(Magnetostrictive Probe)

AUTOMATIC TANK GAUGING SYSTEM

Certification: Leak rate of 0.2 gph with PD = 99.96% and PFA = 0.044%.

Leak Threshold: 0.1 gph. A leak is declared if the output of the measurement system equals or exceeds

this threshold. 

Applicability: Gasoline, diesel, aviation fuel, fuel oil #4, waste oil, and 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 the system 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 91367

Tel: (818) 883-5211 Date of Evaluation: 02/07/91
235

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

performance of the method or equipment.

Revision Date: April 18, 1997

Ronan Engineering Co.

X-76 ETM and X-76 ETM-4X

(Magnetostrictive Probe)

AUTOMATIC TANK GAUGING SYSTEM

Certification: Leak rate of 0.1 gph with PD = 95.34% and PFA = 4.66%.

Leak Threshold: 0.05 gph. A leak is declared if the output of the measurement system equals or exceeds

this threshold. 

Applicability: Gasoline, diesel, aviation fuel, fuel oil #4, waste oil, and 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 91367

Tel: (818) 883-5211 Date of Evaluation: 11/21/91
236

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

performance of the method or equipment.

Revision Date: April 18, 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 leak is declared if the output of the measurement system equals or 

exceeds this threshold. 

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

Tel: (517) 684-6638 Date of Evaluation: 11/26/90
237

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performance of the method or equipment.

Revision Date: April 18, 1997

Simmons Sirvey 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 leak is declared when leak rate 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 Sirvey Corp. Evaluator: S.S.G. Associates

106 E. Main Street Tel: (601) 234-1179

Richardson, TX 75081-3327

Tel: (800) 848-8378 Date of Evaluation: 12/15/92
238

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

performance of the method or equipment.

Revision Date: April 18, 1997

Simmons Sirvey 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 leak is declared when leak rate equals or exceeds this threshold.

Applicability: Motor vehicle fuels.

Tank Capacity: Maximum of 45,000 gallons for single tank or 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: Evaluated for manifolded tank systems using an acceptable protocol.

59% of datasets evaluated were from manifold tank systems.

7% of datasets evaluated used data collected by ATGs.

Of 41 datasets 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 Sirvey Corp. Evaluator: S.S.G. Associates

106 E. Main Street Tel: (601) 234-1179

Richardson, TX 75081-3327

Tel: (800) 848-8378 Date of Evaluation: 10/28/95
239

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

performance of the method or equipment.

Revision Date: April 18, 1997

S.I.R. 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 leak is declared when leak rate equals or exceeds this threshold.

Applicability: Gasoline, diesel, aviation fuel, and 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.

S.I.R. International, Inc. Evaluator: Wilcox Associates

11210 Steeplecrest Dr., Suite 120 Tel: (816) 443-2494

Houston, TX 77065

Tel: (713) 897-0224 Date of Evaluation: 01/27/92
240

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

performance of the method or equipment.

Revision Date: April 18, 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 leak is declared when leak rate equals or exceeds this threshold.

Applicability: Gasoline, diesel, aviation fuel, and 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, Middle TN State Univ.

P.O. Box 2791 Tel: (615) 898-2644

Murfreesboro, TN 37133

Tel: (615) 895-2872 Date of Evaluation: 11/05/92
241

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performance of the method or equipment.

Revision Date: April 18, 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 leak is declared when leak rate equals or exceeds this threshold.

Applicability: Gasoline, diesel, aviation fuel, and 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, Middle TN State Univ.

9 Ford Rd., P.O. Box 229 Tel: (615) 898-2644

Leoma, TN 38468

Tel: (615) 852-4121 Date of Evaluation: 11/05/92
242

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

performance of the method or equipment.

Revision Date: April 18, 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 leak is declared if the output of the measurement system 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

Tel: (800) 323-1242 Date of Evaluation: 11/28/90
243

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

performance of the method or equipment.

Revision Date: April 18, 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 leak is declared when leak rate equals or exceeds this threshold.

Applicability: Gasoline, diesel, aviation fuel, and 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

Tel: (205) 853-0004 Date of Evaluation: 09/30/93
244

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performance of the method or equipment.

Revision Date: April 18, 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 leak is declared if the output of the measurement system equals or 

exceeds this threshold. 

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

and 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

Tel: (908) 280-2233 Date of Evaluation: 11/14/90
245

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

performance of the method or equipment.

Revision Date: April 18, 1997

Tanknology Corp. International

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 leak is declared if the output of the measurement system equals or exceeds

this threshold. 

Applicability: Gasoline, diesel, and 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 test system is installed in the line. 

Test Period: Ranges from 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 Corp. Evaluator: Ken Wilcox Associates

5255 Hollister Tel: (816) 443-2494

Houston, TX 77040

Tel: (800)888-8563 Date of Evaluation: 12/29/91
246

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

performance of the method or equipment.

Revision Date: April 18, 1997

Tanknology Corp. International

VacuTect

NON-VOLUMETRIC TANK TIGHTNESS TEST METHOD (VACUUM)

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

Leak Threshold: A leak is declared 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, and 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.

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. 

Test Pressure: Vacuum must not be greater than 0.5 psi at bottom of tank.

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.
247

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

performance of the method or equipment.

Tanknology Corp. Evaluator: Ken Wilcox Associates

5255 Hollister Tel: (816) 443-2494

Houston, TX 77040

Tel: (800) 888-8563 Dates of Evaluation: 09/08/92, 02/20/92,

01/18/94, 10/28/91 and 02/23/96
248

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performance of the method or equipment.

Revision Date: April 18, 1997

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 leak is declared if the output of the measurement system

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.

Dispenser 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

2615 E. Belt Line Rd. Tel: (816) 443-2494

Carrollton, TX 75006

Tel: (800) 678-7577 Date of Evaluation: 02/02/93
249

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

performance of the method or equipment.

Revision Date: April 18, 1997

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 leak is declared if the output of the measurement system 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.

Dispenser 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

2615 E. Belt Line Rd. Tel: (816) 443-2494

Carrollton, TX 75006

Tel: (800) 678-7577 Date of Evaluation: 02/02/93
250

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

performance of the method or equipment.

Revision Date: April 18, 1997

Tidel Engineering, Inc.

Tidel Environmental Monitoring System, 3500 Series

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

AUTOMATIC TANK GAUGING SYSTEM

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 leak is declared if the output of the measurement system

equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel, and 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

2615 E. Belt Line Rd. Tel: (816) 443-2494

Carrollton, TX 75006
251

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

performance of the method or equipment.

Tel: (800) 678-7577 Date of Evaluation: 03/16/95
252

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

performance of the method or equipment.

Revision Date: April 18, 1997

Tidel Engineering, Inc.

Tidel Environmental Monitoring System, EMS 2000, 3000, and 3500 Series

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

AUTOMATIC TANK GAUGING SYSTEM

Certification: Leak rate of 0.2 gph with PD = 96.2% and PFA = 3%.

Leak Threshold: 0.1 gph. A leak is declared if the output of the measurement system

equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel, fuel oil, and 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

2615 E. Belt Line Rd. Tel: (816) 443-2494

Carrollton, TX 75006

Tel: (800) 678-7577 Date of Evaluation: 06/07/93
253

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

performance of the method or equipment.

Revision Date: April 18, 1997

Tidel Engineering, Inc.

Tidel Environmental Monitoring System, EMS 2000, 3000, and 3500 Series

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

AUTOMATIC TANK GAUGING SYSTEM

Certification: Leak rate of 0.2 gph with PD = 99.91% and PFA = 0.09%.

Leak Threshold: 0.1 gph. A leak is declared if the output of the measurement system

equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel, fuel oil, and 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

2615 E. Belt Line Rd. Tel: (816) 443-2494

Carrollton, TX 75006

Tel: (800) 678-7577 Date of Evaluation: 06/07/93
254

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

performance of the method or equipment.

 Revision Date: April 18, 1997

Tidel Engineering, Inc.

Tidel Environmental Monitoring System, EMS 4000

(Ultrasonic Probe #312-9000)

AUTOMATIC TANK GAUGING SYSTEM

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 leak is declared if the output of the measurement system

equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel, and 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

2615 E. Belt Line Rd. Tel: (816) 443-2494

Carrollton, TX 75006

Tel: (800) 678-7577 Date of Evaluation: 03/16/95
255

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

performance of the method or equipment.

Revision Date: April 18, 1997

Tidel Engineering, Inc.

Tidel Environmental Monitoring System, EMS 4000

(Ultrasonic Probe #312-9000)

AUTOMATIC TANK GAUGING SYSTEM

Certification: Leak rate of 0.1 gph with PD = 98.6% and PFA = 1.4% for a 5 hour test. 

Leak rate of 0.1 gph with PD = 99.7% and PFA = 0.3% for a 6 hour test.

Leak Threshold: 0.05 gph. A leak is declared if the output of the measurement system

equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel, and 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

2615 E. Belt Line Rd. Tel: (816) 443-2494

Carrollton, TX 75006

Tel: (800) 678-7577 Date of Evaluation: 03/16/95
256

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

performance of the method or equipment.

Revision Date: April 18, 1997

Tidel Engineering, Inc.

Tidel Environmental Monitoring System, EMS 4000

(Ultrasonic Probe #312-9001)

AUTOMATIC TANK GAUGING SYSTEM

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

Leak Threshold: 0.1 gph. A leak is declared if the output of the measurement system

equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel, and 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

2615 E. Belt Line Rd. Tel: (816) 443-2494

Carrollton, TX 75006

Tel: (800) 678-7577 Date of Evaluation: 03/16/95
257

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

performance of the method or equipment.

Revision Date: April 18, 1997

Tidel Engineering, Inc.

Tidel Environmental Monitoring System, EMS 4000

(Ultrasonic Probe #312-9001)

AUTOMATIC TANK GAUGING SYSTEM

Certification: Leak rate of 0.1 gph with PD = 97.9% and PFA = 2.1%.

Leak Threshold: 0.05 gph. A leak is declared if the output of the measurement system

equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel, and 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

2615 E. Belt Line Rd. Tel: (816) 443-2494

Carrollton, TX 75006

Tel: (800) 678-7577 Date of Evaluation: 03/16/95
258

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

performance of the method or equipment.

Revision Date: April 18, 1997

Tidel Engineering, Inc.

EMS-3500

with Liquid Discriminatory Probes Part 301-0635

LIQUID-PHASE INTERSTITIAL DETECTOR

Detector:

Output type: qualitative

Sampling frequency: continuous

Operating principle: electrical conductivity/hydrocarbon sensitive polymer

Test Results: *

unleaded gasoline water

Accuracy (%) 100 100

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

 

* At a flow rate of 0.04 gal/hr in a 2.54 cm diameter test chamber.

Specificity Results:

Activated: diesel fuel (at liquid height of 1.78 cm), synthetic fuel (at 2.30 cm), heating oil #2 (at 2.30 cm).

Comments:

Test procedures used were Carnegie Mellon Research Institute's "Test Procedures for Third Party 

Evaluation of Leak Detection Methods: Point Sensor Liquid Contact Leak Detection Systems": 

Final Report - November 11, 1991.

Detector is reusable.

Tidel Engineering, Inc. Evaluator: Carnegie Mellon Research Institute

2615 E. Belt Line Rd. Tel: (412) 268-3495

Carrollton, TX 75006

Tel: (800) 678-7577 Date of Evaluation: 01/29/93
259

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performance of the method or equipment.

Revision Date: April 18, 1997

Tidel Engineering, Inc.

EMS-3500

with Containment Sump Probes Part 301-0642

LIQUID-PHASE INTERSTITIAL DETECTOR

Detector:

Output type: qualitative

Sampling frequency: continuous

Operating principle: magnetic switch/float and hydrocarbon sensitive polymer

Test Results: *

unleaded 

gasoline water

low high

Accuracy (%) 100 100 100

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***

 

* At a flow rate of 0.89 gal/hr in test chamber of diameter 12.6 cm.

** Larger test chamber and flow rate of 1.51 gal/hr.

*** See glossary.

Specificity Results:

Activated at 2.27 cm height: diesel fuel, synthetic fuel, heating oil #2.

Comments:

Test procedures used were Carnegie Mellon Research Institute's "Test Procedures for Third Party 

Evaluation of Leak Detection Methods: Point Sensor Liquid Contact Leak Detection Systems": 

Final Report - November 11, 1991. 

Probe 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 Engineering, Inc. Evaluator: Carnegie Mellon Research Institute

2615 E. Belt Line Rd. Tel: (412) 268-3495

Carrollton, TX 75006

Tel: (800) 678-7577 Date of Evaluation: 02/17/93
260

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

performance of the method or equipment.

 Revision Date: April 18, 1997

Tidel Engineering, Inc.

EMS-3500

Tidel Detector No. 301-0752-001

LIQUID-PHASE INTERSTITIAL DETECTOR

Detector:

Output type: qualitative

Sampling frequency: continuous

Operating principle: float switch

Test Results: *

50 wt% Ethylene glycol in water 30 wt% Calcium chloride in water

up down up down

Accuracy (%) 100 100 100 100

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

* At a flow rate of 0.26 gal/hr in test chamber.

Specificity Results:

Not applicable

Comments:

Intended to monitor the level of either ethylene glycol or calcium chloride solutions in interstitial or annular space 

of a double-walled tank.

Activates an alarm if any significant gain or loss of solution occurs. 

Test procedures used were modified by the evaluator from Carnegie Mellon Research Institute's "Test 

Procedures for Third Party Evaluation of Leak Detection Methods: Point Sensor Liquid Contact Leak Detection 

Systems": Final Report - November 11, 1991.

Detector is reusable.

Tidel Engineering, Inc. Evaluator: Carnegie Mellon Research Institute

2615 E. Belt Line Rd. Tel: (412) 268-3495

Carrollton, TX 75006

Tel: (800) 678-7577 Date of Evaluation: 04/20/93
261

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performance of the method or equipment.

Revision Date: April 18, 1997

Tidel Engineering, Inc.

EMS-3500

with Monitoring Well Probe Part 301-0641

LIQUID-PHASE OUT-OF-TANK PRODUCT DETECTOR

Detector:

Output type: qualitative

Sampling frequency: continuous

Operating principle: conductivity via resistor ladder network

Test Results:

unleaded 

gasoline

synthetic 

gasoline

Accuracy (%) 100 100

Detection time (min:sec) 00:04 00:07

Fall time (min:sec) <01:00 <01:00

Lower detection limit (cm) 0.32 0.32

Specificity Results:

Activated (100%): unleaded gasoline, synthetic gasoline, n-hexane, diesel fuel, jet-A fuel, JP-4 jet fuel, toluene, 

xylene(s).

Comments:

EPA and many states require detection of 1/8 inch (0.32 cm) of product for groundwater monitoring.

Detector is reusable.

Tidel Engineering, Inc. Evaluator: Carnegie Mellon Research Institute

2615 E. Belt Line Rd. Tel: (412) 268-3495

Carrollton, TX 75006

Tel: (800) 678-7577 Date of Evaluation: 02/02/93
262

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

performance of the method or equipment.

Revision Date: April 18, 1997

Tidel Engineering, Inc.

EMS-3500

with Sheen Probes Part 301-0687

LIQUID-PHASE OUT-OF-TANK PRODUCT DETECTOR

Detector:

Output type: qualitative

Sampling frequency: continuous

Operating principle: electrical conductivity/hydrocarbon sensitive polymer

Test Results:

unleaded synthetic

gasoline gasoline

Accuracy (%) 100 100

Detection time (min:sec) 07:45 03:35

Fall time (min:sec) 18:01 16:57

Lower detection limit (cm) 0.02 0.04

Specificity Results:

Activated (100%): unleaded gasoline, synthetic gasoline, n-hexane, diesel fuel, jet-A fuel, JP-4 jet fuel, toluene, 

xylene(s).

Comments:

EPA and many states require detection of 1/8 inch (0.32 cm) of product for groundwater monitoring.

Detector is resuable.

Tidel Engineering, Inc. Evaluator: Carnegie Mellon Research Institute

2615 E. Belt Line Rd. Tel: (412) 268-3495

Carrollton, TX 75006

Tel: (800) 678-7577 Date of Evaluation: 01/31/93
263

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

performance of the method or equipment.

Revision Date: April 18, 1997

Tidel Engineering, Inc.

EMS-3500

Tidel Detector No. 301-0762

LIQUID-PHASE OUT-OF-TANK PRODUCT DETECTOR

Detector:

Output type: qualitative

Sampling frequency: continuous

Operating principle: electrical conductivity/hydrocarbon sensitive polymer

Test Results:

unleaded synthetic

gasoline gasoline

Accuracy (%) 100 100

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:

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

Manufacturer’s specifications:

Groundwater probe used to detect free floating hydrocarbons in monitoring wells.

Comments:

EPA and many states require detection of 1/8 inch (0.32 cm) of product for groundwater monitoring.

Detector is reusable.

Tidel Engineering, Inc. Evaluator: Carnegie Mellon Research Institute

2615 E. Belt Line Rd. Tel: (412) 268-3495

Carrollton, TX 75006

Tel: (800) 678-7577 Date of Evaluation: 03/18/93
264

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

performance of the method or equipment.

Revision Date: April 18, 1997

Tidel Engineering, Inc.

Tidel Detector No. 301-0324-001 and 301-0325-001

LIQUID-PHASE OUT-OF-TANK PRODUCT DETECTOR

Detector:

Output type: qualitative

Sampling frequency: continuous

Operating principle: electrical conductivity

Test Results:

unleaded synthetic JP-4

gasoline gasoline jet fuel

Accuracy (%) 100 100 100

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

Specificity Results:

Activated: unleaded gasoline, synthetic gasoline, n-hexane, diesel fuel, jet-A fuel, JP-4 jet fuel, toluene, 

xylene(s).

Manufacturer’s specifications:

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.

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.

Comments:

EPA and many states require detection of 1/8 inch (0.32 cm) of product for groundwater monitoring. 

Detector is reusable.

Tidel Engineering, Inc. Evaluator: Radian Corp.

2615 E. Belt Line Rd. Tel: (512) 454-4797

Carrollton, TX 75006

Tel: (800) 678-7577 Date of Evaluation: 07/08/91
265

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

performance of the method or equipment.

Revision Date: April 18, 1997

Tidel Engineering, Inc.

Tidel Detector No. 301-0326-001 and 301-0326-002

LIQUID-PHASE OUT-OF-TANK PRODUCT DETECTOR

Detector:

Output type: qualitative

Sampling frequency: continuous

Operating principle: electrical conductivity

Test Results:

unleaded synthetic JP-4

gasoline gasoline jet fuel

Accuracy (%) 100 100 100

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:

Activated: unleaded gasoline, synthetic gasoline, n-hexane, diesel fuel, jet-A fuel, JP-4 jet fuel, toluene, 

xylene(s).

Manufacturer’s specifications:

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.

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:

EPA and many states require detection of 1/8 inch (0.32 cm) of product for groundwater monitoring.

Detector is reusable.

Tidel Engineering, Inc. Evaluator: Radian Corp.

2615 E. Belt Line Rd. Tel: (512) 454-4797

Carrollton, TX 75006

Tel: (800) 678-7577 Date of Evaluation: 07/08/91
266

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performance of the method or equipment.

Revision Date: April 18, 1997

Tidel Engineering, Inc.

EMS-3000

301-0328-001, 301-0330-001

VAPOR-PHASE OUT-OF-TANK PRODUCT DETECTOR

Detector:

Output type: qualitative

Sampling frequency: continuous

Operating principle: adsistor

Test Results:

unleaded synthetic JP-4

gasoline gasoline jet fuel

Accuracy (%) 100 100 100

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:

Activated: unleaded gasoline, synthetic gasoline, JP-4 jet fuel, toluene, xylene(s)

Not Activated: n-hexane.

Comments:

Test procedures used were Radian Corporation's draft report "Development of Procedures to 

Assess the Performance of External Leak Detection Devices: Vapor-Phase ASTMFormatted Methods," June 29, 1990.

Tidel Engineering, Inc. Evaluator: Radian Corp.

2615 E. Belt Line Rd. Tel: (512) 454-4797

Carrollton, TX 75006

Tel: (800) 678-7577 Date of Evaluation: 07/08/91
267

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performance of the method or equipment.

Revision Date: April 18, 1997

Tidel Engineering, Inc.

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:

unleaded synthetic JP-4

gasoline gasoline jet fuel

Accuracy* (%) 100 100 100

Detection time* (min:sec) 2:46 1:41 1:50

Fall time* (hr:min:sec) >1:00:00** >1:00:00** >1:00:00**

Lower detection limit (ppm) 100 500 100

 

* For tests conducted with 1000 ppm of test gas.

** The vapor sensor probe was recalibrated when it did not recover after 1 hour, from exposure to test vapors.

Specificity Results:

Activated: unleaded gasoline, synthetic gasoline, n-hexane, JP-4 jet fuel, toluene, xylene(s).

Manufacturer’s specifications:

Vapor sensor probe for use in normally dry monitoring wells to detect hydrocarbon vapors. 

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.

Comments:

Test procedures used were Radian Corporation's draft report "Development of Procedures to 

Assess the Performance of External Leak Detection Devices: Vapor-Phase ASTM-Formatted 

Methods," June 29, 1990.

Tidel Engineering, Inc. Evaluator: Carnegie Mellon Research Institute

2615 E. Belt Line Rd. Tel: (412) 268-3495

Carrollton, TX 75006

Tel: (800) 678-7577 Date of Evaluation: 03/18/93
268

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performance of the method or equipment.

Revision Date: April 18, 1997

Tokheim Corp.

Tokheim Pressure Monitor, Models PM 101 and 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 leak is declared if the output of the measurement system equals or exceeds

this threshold. 

Applicability: Gasoline, diesel, and 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

Tel: (219) 423-2552 Date of Evaluation: 11/02/90
269

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performance of the method or equipment.

Revision Date: April 18, 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 leak is declared 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. 

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 systems, 

several days or weeks may be required to circulate tracer-labeled fuel through all 

parts of the system. 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 test method.

Presence of groundwater surrounding pipeline may also reduce effectiveness of 

test method (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 (1991)

3755 N. Business Center Dr. Tel: (816) 443-2494 

Tucson, AZ 85705 Control Strategies Engineering (1992)

Tel: (800) 989-9929 Tel: (602) 682-8726

Dates of Evaluation: 10/04/91 and 05/92
270

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performance of the method or equipment.

Revision Date: April 18, 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 leak is declared when tracer chemical is detected outside of the tank.

Applicability: All fluid petroleum products and any other fluid with which an acceptable 

tracer is compatible. 

Tank Capacity: This test method 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 method 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 test method.

Presence of groundwater above bottom of tank may also limit

effectiveness of test method (e.g. when applied to tanks containing watermiscible products or products whose specific gravity is greater than 1).

Tracer Research Corp. Evaluator: Ken Wilcox Associates (1990)

3755 N. Business Center Dr.

Tucson, AZ 85705

Tel: (816) 443-2494 

Control Strategies Engineering (1992)

Tel: (800) 989-9929 Tel: (602) 682-8726

Dates of Evaluation: 10/04/90 and 05/92
271

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performance of the method or equipment.

Revision Date: April 18, 1997

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 gasoline Tracers

Accuracy (%) <20 <20 <20 <20 N/R*

Bias (%) 0 0 0 0 N/R

Detection time (min) <0.01 <0.01 <0.01 <0.01 N/R

Fall time (min) <0.01 <0.01 <0.01 <0.01 N/R

Lower detection limit (ppm) 20 20 20 20 N/R

Tracer Detector

xylene benzene 2-methylbutane gasoline Tracers

Accuracy (%) N/R N/R N/R N/R <20

Bias (%) N/R N/R N/R N/R 0

Detection time (min) N/R N/R N/R N/R <0.01

Fall time (min) N/R N/R N/R N/R <0.01

Lower detection limit (ppm) N/R N/R N/R N/R 10-5

* See glossary.

Specificity Results:

See above.

Manufacturer’s specifications:

Soil permeability at the site must exceed 1 Darcy.

Comments:

Test procedures used were a combination of EPA's "Standard Test Procedures for Evaluating Leak Detection 

Methods: Nonvolumetric Tank Tightness Testing Methods," March 1990 and "recognized national 

standard of GC/FID hydrocarbon measurements." 

Method 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

Tel: (800)989-9929 Date of Evaluation: 05/05/92
272

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performance of the method or equipment.

Revision Date: April 18, 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 leak is declared if the output of the measurement system equals or exceeds

this threshold. 

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

172 W. Verdugo Ave. Tel: (213) 723-7181

Burbank, CA 91502-2132

Tel: (818) 840-7020 Date of Evaluation: 03/03/92
273

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performance of the method or equipment.

Revision Date: April 18, 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 leak is declared 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, and 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 underfilled 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.

172 W. Verdugo Ave. Tel: (213) 723-7181

Burbank, CA 91502-2132

Tel: (818) 840-7020 Date of Evaluation: 05/05/93
274

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performance of the method or equipment.

 Revision Date: April 18, 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 leak is declared 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 and 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 method 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.

172 W. Verdugo Ave. Tel: (213) 723-7181

Burbank, CA 91502-2132

Tel: (818) 840-7020 Date of Evaluation: 02/04/93
275

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performance of the method or equipment.

Revision Date: April 18, 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 leak is declared if the output of the measurement system equals or 

exceeds this threshold. 

Applicability: Gasoline, diesel, fuel oil, waste oil, and 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.

172 W. Verdugo Ave. Tel: (213) 723-7181

Burbank, CA 91502-2132

Tel: (818) 840-7020 Date of Evaluation: 04/02/91
276

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performance of the method or equipment.

Revision Date: April 18, 1997

Universal Sensors and Devices, Inc.

TICS-1000

(Magnetostrictive Probe)

AUTOMATIC TANK GAUGING SYSTEM

Certification: Leak rate of 0.2 gph with PD = 96.6% and PFA = 3.4%.

Leak Threshold: 0.1 gph. A leak is declared if the output of the measurement system equals or exceeds

this threshold. 

Applicability: Gasoline, diesel, aviation fuel, and 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

Tel: (818) 988-7121 Date of Evaluation: 08/20/93
277

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performance of the method or equipment.

Revision Date: April 18, 1997

Universal Sensors and Devices, Inc.

LTC-1000

(Mass Buoyancy Probe)

LARGE TANK AUTOMATIC TANK GAUGING SYSTEM

Certification: Leak rate of 1.4 gph with PD = 97.2% and PFA = 2.8%.

This leak rate does not meet EPA requirements for monthly monitoring (0.2 gph) or tank 

tightness testing (0.1 gph).

Leak Threshold: 0.7 gph. A leak is declared if the output of the measurement system equals or exceeds 

this threshold.

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

Other liquids may be tested after consultation with the manufacturer.

Tank Capacity: Maximum of 2,000,000 gallons. Application of this method for larger tanks is currently 

under review to determine correct scalling factors for leak rate, threshold and test time 

versus tank size.

Tank must be minimum 90% full.

Waiting Time: Minimum of 3 hours, 42 minutes between delivery and testing.

None between dispensing and testing.

Test Period: Minimum of 49 hours.

Test data are acquired and recorded by a computer.

There must be no dispensing or delivery during test.

Temperature: System does not require measurement of product temperature. 

Water Sensor: System does not use a water probe.

Water ingress is detected by an increase in total mass of product in the tank.

To monitor water continuously, a separate water sensing probe must be installed.

Calibration: The mass bouyancy 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

Tel: (818) 988-7121 Date of Evaluation: 05/17/96
278

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performance of the method or equipment.

Revision Date: April 18, 1997

Universal Sensors and Devices, Inc.

LTC-2000

(Differential Pressure Probe)

LARGE TANK AUTOMATIC TANK GAUGING SYSTEM

Certification: Leak rate of 3.0 gph with PD = 98.8% and PFA = 1.2%.

This leak rate does not meet EPA requirements for monthly monitoring (0.2 gph) or tank 

tightness testing (0.1 gph).

Leak Threshold: 1.5 gph. A leak is declared if the output of the measurement system equals or exceeds 

the threshold.

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

Other liquids may be tested after consultation with the manufacturer.

Tank Capacity: Maximum of 2,000,000 gallons.

Application of this method for larger tanks is currently under review to determine correct 

scaling factors for leak rate, threshold and test time versus tank size.

Tank must be minimum 90% full.

Waiting Time: Minimum of 3 hours, 30 minutes between delivery and testing.

None between dispensing and testing.

Test Period: Minimum of 48 hours, 18 minutes.

Test data are acquired and recorded by a computer.

There must be no dispensing or delivery during test.

Temperature: System does not require measurement of product temperature. 

Water Sensor: System does not use a water probe.

Water ingress is detected by a change in pressure at the bottom of the tank.

To monitor water continuously, a separate water sensing probe must be installed.

Calibration: The differential pressure probe must be checked and calibrated in accordance with 

manufacturer's instructions.

Comments: To detect losses or gains in the tank, the system uses a differential pressure

probe to measure changes in pressure at the bottom of the tank.

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

Tel: (818) 988-7121 Date of Evaluation: 05/17/96
279

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performance of the method or equipment.

 Revision Date: April 18, 1997

Universal Sensors and Devices, Inc.

Leak Alert System Models LAL-100, LA-01, LA-02, LA-04, LA-X4, LA-08, CATLAS 

Liquid Sensor LALS-1

LIQUID-PHASE INTERSTITIAL DETECTOR

Detector:

Output type: qualitative

Sampling frequency: continuous

Operating principle: thermal conductivity

Test Results: *

unleaded

gasoline

Accuracy (%) 100

Response time (min) 1.24

Recovery time (min) <1

Product activation height (cm) 0.61

Lower detection limit (cm) 0.76

 

* At a flow rate of 0.04 gal/hr in a 2.6 cm diameter test chamber.

Specificity Results:

Activated: diesel fuel, synthetic fuel, heating oil #2, water.

Comments:

EPA and many states require detection of 1/8 inch (0.32 cm) of product for groundwater monitoring. 

Test procedures used were Carnegie Mellon Research Institute's "Test Procedures for Third Party Evaluation of 

Leak Detection Methods: Point Sensor Liquid Contact Leak Detection Systems": Final Report -

November 11, 1991.

Detector is reusable.

Universal Sensors and Devices, Inc. Evaluator: Carnegie Mellon Research Institute

9205 Alabama Ave., Unit C Tel: (412) 268-3495

Chatsworth, CA 91311

Tel: (818) 988-7121 Date of Evaluation: 06/01/94
280

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performance of the method or equipment.

Revision Date: April 18, 1997

Universal Sensors and Devices, Inc.

Leak Alert System Models LAL-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 synthetic JP-4

gasoline gasoline jet fuel

Accuracy (%) 100 100 100

Detection time (min:sec) 00:31 00:40 00:42

Fall time (min:sec) 4:43 4:25 4:30

Lower detection limit (ppm) 100 N/D* N/D

* See glossary.

Specificity Results:

Activated: unleaded gasoline, synthetic gasoline, JP-4 jet fuel, n-hexane, toluene, xylene(s).

Comments:

Test procedures used were Radian Corporation's draft report "Development of Procedures to 

Assess the Performance of External Leak Detection Devices: Vapor-Phase ASTMFormatted Methods," June 29, 1990.

Universal Sensors and Devices, Inc. Evaluator: Carnegie Mellon Research Institute

9205 Alabama Ave., Unit C Tel: (412) 268-3495

Chatsworth, CA 91311

Tel: (818) 988-7121 Date of Evaluation: 06/01/94
281

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performance of the method or equipment.

Revision Date: April 18, 1997

USTest

UST 2001 (Quick Test)

(Ultrasonic Probe)

AUTOMATIC TANK GAUGING SYSTEM

Certification: Leak rate of 0.2 gph with PD=97.5% and PFA=2.5%.

Leak Threshold: 0.1 gph. A leak is declared if the output of the measurement system equals or exceeds

this threshold.

Applicability: Gasoline, diesel, and 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. (see Comments section below) 

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: With a test period of 1 hour, method has a PD = 99.9% and a PFA = 0.1%.

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 Evaluator: Ken Wilcox Associates

2727 Kaliste Saloom Rd. Tel: (816) 443-2494

Lafayette, LA 70508

Tel: (318) 981-9421 Date of Evaluation: 06/06/95
282

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

performance of the method or equipment.

Revision Date: April 18, 1997

USTest

UST 2001

(Ultrasonic Probe)

AUTOMATIC TANK GAUGING SYSTEM

Certification: Leak rate of 0.1 gph with PD=95.2% and PFA=4.8%.

Leak Threshold: 0.05 gph. A leak is declared if the output of the measurement system equals or exceeds

this threshold.

Applicability: Gasoline, diesel, and 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. (see Comments section below) 

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: With a test period of 2 hours, method has a PD = 98.6% and a PFA = 1.4%.

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 Evaluator: Ken Wilcox Associates

2727 Kaliste Saloom Rd. Tel: (816) 443-2494

Lafayette, LA 70508

Tel: (318) 981-9421 Date of Evaluation: 06/06/95
283

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

performance of the method or equipment.

 Revision Date: April 18, 1997

USTest

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 leak is declared 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, and 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.

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 underfilled 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 Evaluator: Ken Wilcox Associates

2727 Kaliste Saloom Rd. Tel: (816) 443-2494

Lafayette, LA 70508

Tel: (318) 981-9421 Date of Evaluation: 03/24/92
284

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

performance of the method or equipment.

 Revision Date: April 18, 1997

USTest

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 leak is declared if the output of the measurement system 

equals or exceeds this threshold.

Applicability: Gasoline, diesel, aviation fuel, water, and 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 Evaluator: Ken Wilcox Associates

2727 Kaliste Saloom Rd. Tel: (816) 443-2494

Lafayette, LA 70508

Tel: (318) 981-9421 Date of Evaluation: 06/09/94
285

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

performance of the method or equipment.

Revision Date: April 18, 1997

USTest

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 leak is declared if the output of the measurement system equals or exceeds 

this threshold. 

Applicability: Gasoline, diesel, aviation fuel, waste oil, water, and 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 between 10,000 and 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 Evaluators: Midwest Research Institute

2727 Kaliste Saloom Rd. Tel: (816) 753-7600

Lafayette, LA 70508 

Tel: (318) 981-9421

and Ken Wilcox Associates 

Tel: (816) 443-2494

Dates of Evaluation: 12/05/90 (1000-10000 gallons),

and 08/04/92 (10000-45000 gallons)
286

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performance of the method or equipment.

Revision Date: April 18, 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 leak is declared when a continuous loss equals or exceeds this threshold 

at the 5% level of significance.

Applicability: Gasoline, diesel, aviation fuel, and 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

Tel: (303) 986-8011 Date of Evaluation: 10/31/91
287

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

performance of the method or equipment.

Revision Date: April 18, 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 leak is declared when leak rate equals or exceeds this threshold.

Applicability: Gasoline, diesel, aviation fuel, and 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

Tel: (303) 986-8011 Date of Evaluation: 03/31/94
288

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

performance of the method or equipment.

Revision Date: April 18, 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 leak is declared when a consistent loss equals or exceeds this threshold that 

is statistically significant from zero at the 5% confidence level.

Applicability: Gasoline, diesel, aviation fuel, and 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

Tel: (303) 986-8011 Date of Evaluation: 12/17/90
289

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

performance of the method or equipment.

Revision Date: April 18, 1997

Vaporless Manufacturing

Vaporless LD 2000 and 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 leak is declared if the output of the measurement system equals or 

exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel and 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

9234 E. Valley Rd., Suite C Tel: (816) 443-2494

Prescott Valley, AZ 86314

Tel: (602) 775-5191 Date of Evaluation: 11/19/90
290

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performance of the method or equipment.

Revision Date: April 18, 1997

Vaporless Manufacturing

Vaporless LD 2000E and LD 2000E-S

AUTOMATIC MECHANICAL LINE LEAK DETECTOR

Certification: Leak rate of 3.0 gph with PD=100% and PFA=0%. 

Leak Threshold: 2.0 gph. A leak is declared if the output of the measurement system equals or exceeds 

this threshold. 

Applicability: Gasoline, diesel, aviation fuel and 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

9234 E. Valley Rd., Suite C Tel: (816) 443-2494

Prescott Valley, AZ 86314

Tel: (602) 775-5191 Date of Evaluation: 12/11/92
291

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

performance of the method or equipment.

Revision Date: April 18, 1997

Vaporless Manufacturing

Vaporless LD 2000T and 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 leak is declared if the output of the measurement system equals or exceeds 

this threshold. 

Applicability: Gasoline, diesel, aviation fuel and 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

9234 E. Valley Rd., Suite C Tel: (816) 443-2494

Prescott Valley, AZ 86314

Tel: (602) 775-5191 Date of Evaluation: 07/13/93
292

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

performance of the method or equipment.

Revision Date: April 18, 1997

Vaporless Manufacturing

Vaporless LD 3000 and 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 leak is declared if the output of the measurement system equals or exceeds 

this threshold. 

Applicability: Gasoline, diesel, aviation fuel and 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

9234 E. Valley Rd., Suite C Tel: (816) 443-2494

Prescott Valley, AZ 86314

Tel: (602) 775-5191 Date of Evaluation: 08/20/93
293

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performance of the method or equipment.

Revision Date: April 18, 1997

Veeder-Root

TLS-350 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 leak is declared if the output of the measurement system

equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel, and 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 128 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.

Dispenser 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 Rev. by Ken Wilcox Associates

Tel: (203) 651-2700 Tel: (816) 443-2494

Date of Evaluation: 09/20/91, Rev. 04/12/93
294

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

performance of the method or equipment.

 Revision Date: April 18, 1997

Veeder-Root

TLS-350 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 leak is declared if the output of the measurement system equals or exceeds 

this threshold. 

Applicability: Gasoline, diesel, aviation fuel, and 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 128 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.

Dispenser 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 Rev. by Ken Wilcox Associates, Inc.

Tel: (203) 651-2700 Tel: (816) 443-2494

Dates of Evaluation: 09/20/91, Rev. 04/12/93
295

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

performance of the method or equipment.

Revision Date: April 18, 1997

Veeder-Root

TLS-350 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 leak is declared if the output of the measurement system

equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel, and 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 128 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.

Dispenser 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 Rev. by Ken Wilcox Associates, Inc.

Tel: (203) 651-2700 Tel: (816) 443-2494

Date of Evaluation: 09/20/91, Rev. 04/12/93
296

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

performance of the method or equipment.

Revision Date: April 18, 1997

Veeder-Root

TLS-350 Line Leak Detector for Flexible Pipelines, 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 leak is declared if the output of the measurement system

equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel, and 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 158.4 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.

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

Tel: (203) 651-2700 Date of Evaluation: 08/04/93
297

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

performance of the method or equipment.

Revision Date: April 18, 1997

Veeder-Root

TLS-350 Line Leak Detector for Flexible Pipelines, Series 8475

AUTOMATIC ELECTRONIC LINE LEAK DETECTOR

Certification: Leak rate of 0.2 gph with PD=96% and PFA=4%. 

Leak Threshold: 0.1 gph. A leak is declared if the output of the measurement system

equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel, and 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 158.4 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 ranges from 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.

Dispenser 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

Tel: (203) 651-2700 Date of Evaluation: 08/04/93
298

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

performance of the method or equipment.

Revision Date: April 18, 1997

Veeder-Root

TLS-350 Line Leak Detector for Flexible Pipelines, 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 leak is declared if the output of the measurement system

equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel, and 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 158.4 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 ranges from 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.

Dispenser 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

Tel: (203) 651-2700 Date of Evaluation: 08/04/93
299

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

performance of the method or equipment.

Revision Date: April 18, 1997

Veeder-Root

TLS 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 leak is declared if the output of the measurement system equals or 

exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel, and 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 89 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.

Dispenser 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

Tel: (203) 651-2700 Date of Evaluation: 08/07/91
300

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performance of the method or equipment.

Revision Date: April 18, 1997

Veeder-Root

TLS 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 leak is declared if the output of the measurement system equals or 

exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel, and 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 89 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.

Dispenser 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

Tel: (203) 651-2700 Date of Evaluation: 08/07/91
301

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

performance of the method or equipment.

Revision Date: April 18, 1997

Veeder-Root

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 leak is declared if the output of the measurement system

equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel, and 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 2 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.

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

Tel: (203) 651-2700 Date of Evaluation: 05/08/96
302

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

performance of the method or equipment.

Revision Date: April 18, 1997

Veeder-Root

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 leak is declared if the output of the measurement system

equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel, and 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 15 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.

Message display,alarm activation, and dispensing shut-down if leak is declared.

Calibration: Equipment 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

Tel: (203) 651-2700 Date of Evaluation: 05/08/96
303

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

performance of the method or equipment.

Revision Date: April 18, 1997

Veeder-Root

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 leak is declared if the output of the measurement system

equals or exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel, and 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 2 hours.

Test Period: Response time is 32-48 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.

Message display and alarm activation if leak is detected.

Calibration: Equipment 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

Tel: (203) 651-2700 Date of Evaluation: 05/08/96
304

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

performance of the method or equipment.

 Revision Date: April 18, 1997

Veeder-Root

TLS-200/200i/300/400 UST ATGS 

(7842 Digital Sensing Capacitance Probe)

AUTOMATIC TANK GAUGING SYSTEM

Certification: Leak rate of 0.2 gph with PD=99% and PFA=1%. 

Leak Threshold: 0.1 gph. A leak is declared if the output of the measurement system equals or exceeds 

this threshold. 

Applicability: Gasoline, diesel, aviation fuel, and 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

Tel: (203) 651-2700 Date of Evaluation: 05/14/93
305

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

performance of the method or equipment.

Revision Date: April 18, 1997

Veeder-Root

TLS-200/200i/300/400 UST ATGS 

(8472 Digital Sensing Capacitance Probe)

AUTOMATIC TANK GAUGING SYSTEM

Certification: Leak rate of 0.2 gph with PD=99% and PFA=0.2%. 

Leak Threshold: 0.126 gph. A leak is declared if the output of the measurement system equals or exceeds 

this threshold. 

Applicability: Gasoline, diesel, aviation fuel, and 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 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

Tel: (203) 651-2700 Date of Evaluation: 05/14/93
306

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

performance of the method or equipment.

Revision Date: April 18, 1997

Veeder-Root

TLS-200/200i/300/400 UST ATGS 

(8472 Digital Sensing Capacitance Probe)

AUTOMATIC TANK GAUGING SYSTEM

Certification: Leak rate of 0.1 gph with PD=99% and PFA=0.1%. 

Leak Threshold: 0.071 gph. A leak is declared if the output of the measurement system equals or exceeds 

this threshold. 

Applicability: Gasoline, diesel, aviation fuel, and 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 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 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

Tel: (203) 651-2700 Date of Evaluation: 05/14/93
307

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

performance of the method or equipment.

Revision Date: April 18, 1997

Veeder-Root

TLS-200/200i/250/250i/300/350/400 UST ATGS 

(8473 Digital Sensing Magnetostrictive Probe)

AUTOMATIC TANK GAUGING SYSTEM

Certification: Leak rate of 0.2 gph with PD=99% and PFA=0.1%. 

Leak Threshold: 0.093 gph. A leak is declared if the output of the measurement system equals or exceeds 

this threshold. 

Applicability: Gasoline, diesel, aviation fuel, and 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 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 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

Tel: (203) 651-2700 Date of Evaluation: 05/14/93
308

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

performance of the method or equipment.

Revision Date: April 18, 1997

Veeder-Root

TLS-200/200i/250/250i/300/350/400 UST ATGS 

(8473 Digital Sensing Magnetostrictive Probe)

AUTOMATIC TANK GAUGING SYSTEM

Certification: Leak rate of 0.1 gph with PD=99% and PFA=1%. 

Leak Threshold: 0.071 gph. A leak is declared if the output of the measurement system equals or exceeds 

this threshold. 

Applicability: Gasoline, diesel, aviation fuel, and waste oil, and 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 dispensing or 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 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 0.544 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

Tel: (203) 651-2700 Date of Evaluation: 03/14/95
309

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

performance of the method or equipment.

 Revision Date: April 18, 1997

Veeder-Root

TLS Series 300/400 Monitoring Systems

with CSLD versions 8473 and 8493 

(Magnetostrictive Probes)

CONTINUOUS IN-TANK LEAK DETECTION SYSTEM

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 leak is declared and a message is printed for the operator if the output of the measurement system 

equals or exceeds this threshold. 

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

Test procedure used was Midwest Research Institute’s “Evaluation of Continuous In-Tank Leak 

Detection Systems,” April 17, 1995.

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.
310

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performance of the method or equipment.

Veeder-Root Evaluator: Midwest Research Institute

125 Powder Forest Dr. Tel: (816) 753-7600

Simsbury, CT 06070-2003

Tel: (203) 651-2700 Date of Evaluation: 06/10/96
311

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

performance of the method or equipment.

Revision Date: April 18, 1997

Veeder-Root

TLS-250i, TLS 250i Plus, ILS 250, ILS 350, TLS-350 

Interstitial Liquid Sensor for Fiberglass Tanks (0794390-401) 

LIQUID-PHASE INTERSTITIAL DETECTOR

Detector:

Output type: qualitative

Sampling frequency: continuous

Operating principle: float switch

Test Results: *

unleaded

gasoline**

synthetic

gasoline***

Accuracy (%) 100 100

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

 

* At a flow rate of 0.19 gal/hr in 7.6 cm diameter test chamber.

** TLS-250, TLS 250i Plus, ILS 250

*** ILS 350, TLS-350

Specificity Results:

Activated: diesel fuel, synthetic fuel, heating oil #2, water.

Comments:

EPA and many states require detection of 1/8 inch (0.32 cm) of product for groundwater monitoring. 

Test procedures used were Carnegie Mellon Research Institute's "Test 

Procedures for Third Party Evaluation of Leak Detection Methods: Point Sensor Liquid 

Contact Leak Detection Systems": Final Report - November 11, 1991.

Detector is reusable.

Veeder-Root Evaluator: Carnegie Mellon Research Institute

125 Powder Forest Dr. Tel: (412) 268-3495

Simsbury, CT 06070-2003

Tel: (203) 651-2700 Date of Evaluation: 07/17/92
312

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

performance of the method or equipment.

Revision Date: April 18, 1997

Veeder-Root

TLS-250, TLS 250i Plus, ILS 250, ILS 350, TLS-350 

Interstitial Liquid Sensor for Steel Tanks (0794390-420)

LIQUID-PHASE INTERSTITIAL DETECTOR

Detector:

Output type: qualitative

Sampling frequency: continuous

Operating principle: float switch

Test Results:

unleaded synthetic

gasoline *gasoline**

Accuracy (%) 100 100

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

* TLS-250, TLS 250i Plus, ILS 250, at a flow rate of 0.13 gal/hr in 4.8 cm diameter test chamber.

** ILS 350, TLS-350, at a flow rate of 0.12 gal/hr in 4.8 cm diameter test chamber.

Specificity Results:

Activated: diesel fuel, synthetic fuel, heating oil #2, water.

Comments:

EPA and many states require detection of 1/8 inch (0.32 cm) of product for groundwater monitoring. 

Test procedures used were Carnegie Mellon Research Institute's "Test Procedures for Third Party 

Evaluation of Leak Detection Methods: Point Sensor Liquid Contact Leak Detection Systems": Final Report -

November 11, 1991.

Detector is reusable.

Veeder-Root Evaluator: Carnegie Mellon Research Institute

125 Powder Forest Dr. Tel: (412) 268-3495

Simsbury, CT 06070-2003

Tel: (203) 651-2700 Date of Evaluation: 07/17/92
313

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

performance of the method or equipment.

Revision Date: April 18, 1997

Veeder-Root

TLS-250i, TLS 250i Plus, ILS 250, ILS 350, TLS-350

Liquid Sensor for Sumps (0794390-206) 

LIQUID-PHASE INTERSTITIAL DETECTOR

Detector:

Output type: qualitative

Sampling frequency: continuous

Operating principle: float switch

Test Results:

unleaded synthetic

gasoline*gasoline**

Accuracy (%) 100 100

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

* TLS-250, TLS 250i Plus, ILS 250, at a flow rate of 0.15 gal/hr in 5.8 cm diameter test chamber.

** ILS 350, TLS-350, at a flow rate of 0.14 gal/hr in 5.8 cm diameter test chamber.

Specificity Results:

Activated: diesel fuel, synthetic fuel, heating oil #2, water.

Comments:

EPA and many states require detection of 1/8 inch (0.32 cm) of product for groundwater monitoring. 

Test procedures used were Carnegie Mellon Research Institute's "Test 

Procedures for Third Party Evaluation of Leak Detection Methods: Point Sensor Liquid 

Contact Leak Detection Systems": Final Report - November 11, 1991.

Detector is reusable.

Veeder-Root Evaluator: Carnegie Mellon Research Institute

125 Powder Forest Dr. Tel: (412) 268-3495

Simsbury, CT 06070-2003

Tel: (203) 651-2700 Date of Evaluation: 07/17/92
314

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

performance of the method or equipment.

Revision Date: April 18, 1997

Veeder-Root

TLS-350 Discriminating Insterstitial Liquid Sensor

LIQUID-PHASE INTERSTITIAL DETECTOR

Detector:

Output type: qualitative

Sampling frequency: continuous

Operating principle: capacitance change/ultrasonic

Test Results: *

unleaded

gasoline water

Accuracy (%) 100 100

Response time (min) 0.46 1.36

Recovery time (min) <1 <1

Product activation height (cm) 0.23 0.69

 

* At a flow rate of 0.94 gal/hr in 14.4 cm diameter test chamber.

Specificity Results:

Activated: diesel fuel (at liquid height of 0.37 cm), synthetic fuel (at 0.35 cm), heating oil #2 

(at 0.43 cm).

Comments:

EPA and many states require detection of 1/8 inch (0.32 cm) of product for groundwater monitoring. 

Detectors are listed as interstitial due to intended use. 

Test procedures used were Carnegie Mellon Research Institute's "Test Procedures for Third Party Evaluation of 

Leak Detection Methods: Point Sensor Liquid Contact Leak Detection Systems": Final Report -

November 11, 1991.

Detector is reusable.

Veeder-Root Evaluator: Carnegie Mellon Research Institute

125 Powder Forest Dr. Tel: (412) 268-3495

Simsbury, CT 06070-2003

Tel: (203) 651-2700 Date of Evaluation: 06/30/93
315

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

performance of the method or equipment.

Revision Date: April 18, 1997

Veeder-Root

TLS-350

Dispenser Pan Sensor(794380-320) and Containment Sump Sensor(794380-350)

LIQUID-PHASE INTERSTITIAL DETECTOR

Detector:

Output type: qualitative

Sampling frequency: continuous

Operating principle: electrical conductivity/ultrasonic

Test Results: *

unleaded

gasoline water 

low high

Accuracy (%) 100 100 100

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

 

* At a flow rate of 0.17 gal/hr in a 6.0 cm diameter test chamber.

Specificity Results:

Activated: diesel fuel (at liquid height of 4.75 cm), synthetic fuel (at 2.58 cm), heating oil #2 

(at 4.67 cm).

Comments:

EPA and many states require detection of 1/8 inch (0.32 cm) of product for groundwater monitoring. 

Test procedures used were Carnegie Mellon Research Institute's "Test Procedures for Third Party 

Evaluation of Leak Detection Methods: Point Sensor Liquid Contact Leak Detection Systems": 

Final Report - November 11, 1991.

Detector is reusable.

Veeder-Root Evaluator: Carnegie Mellon Research Institute

125 Powder Forest Dr. Tel: (412) 268-3495

Simsbury, CT 06070-2003

Tel: (203) 651-2700 Date of Evaluation: 05/26/93
316

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performance of the method or equipment.

Revision Date: April 18, 1997

Veeder-Root

TLS-350

Dual and Single Stage Hydrostatic Sensors

LIQUID-PHASE INTERSTITIAL DETECTOR

Detector:

Output type: qualitative

Sampling frequency: continuous

Operating principle: float switch

Test Results: *

50 wt% Ethylene glycol in water 30 wt% Calcium chloride in water

up down up down

Accuracy (%) 100 100 100 100

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

 

* At a flow rate of 0.33 gal/hr in a test chamber of 7.8 cm diameter.

Specificity Results:

Not applicable

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. 

Test procedures used were modified by evaluator from Carnegie Mellon Research Institute's "Test Procedures for 

Third Party Evaluation of Leak Detection Methods: Point Sensor Liquid Contact Leak Detection Systems": Final 

Report - November 11, 1991.

Detector is reusable.

Veeder-Root Evaluator: Carnegie Mellon Research Institute

125 Powder Forest Dr. Tel: (412) 268-3495

Simsbury, CT 06070-2003

Tel: (203) 651-2700 Date of Evaluation: 12/07/92
317

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

performance of the method or equipment.

 Revision Date: April 18, 1997

Veeder-Root

TLS-350

Solid-State Pan/Sump Sensor (794380-321, -351), Piping Sump Sensor (794380-208), 

Micro Sensor (794380-340)

LIQUID-PHASE INTERSTITIAL DETECTOR

Detector:

Output type: qualitative

Sampling frequency: continuous

Operating principle: product permeable/ultrasonic/float switch

Test Results:

unleaded

gasoline diesel fuel water

Piping Sump Sensor (794380-208)

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)

Min. 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)

Min. product thickness (cm) 0.51 0.46 0.48

Precision 0.011 0.007 0.007

Detection time (sec) <1 <1 <1

Specificity Results:

unleaded gasoline, diesel fuel, water.

Comments:

EPA and many states require detection of 1/8 inch (0.32 cm) of product for groundwater monitoring. 

Test procedures used were modified by evaluator from EPA's "Standard 

Test Procedures for Evaluation Leak Detection Methods: Liquid-Phase Out-of-Tank Product 

Detectors," March 1990.

Veeder-Root Evaluator: Ken Wilcox Associates

125 Powder Forest Dr. Tel: (816) 443-2494

Simsbury, CT 06070-2003

Tel: (203) 651-2700 Date of Evaluation: 10/20/94
318

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performance of the method or equipment.

Revision Date: April 18, 1997

Veeder-Root

350 Series UST Monitoring Systems: Models ILS-350, TLS-350, TLS-350R

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 synthetic

gasoline gasoline

Accuracy (%) 100 100

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:

Activated: unleaded gasoline, synthetic gasoline, 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:

EPA and many states require detection of 1/8 inch (0.32 cm) of product for groundwater monitoring. 

Detector is 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 (TLS-350) and

Tel: (203) 651-2700 07/28/92
319

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performance of the method or equipment.

Revision Date: April 18, 1997

Veeder-Root

ILS 350, TLS-350 

Adsistor Vapor Probes

VAPOR-PHASE OUT-OF-TANK PRODUCT DETECTOR

Detector:

Output type: qualitative

Sampling frequency: continuous

Operating principle: adsistor

Test Results:

unleaded synthetic JP-4

gasoline gasoline 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:

Activated: unleaded gasoline, JP-4 jet fuel

Not Activated: synthetic gasoline, n-hexane, toluene, xylene(s).

Comments:

Test procedures used were Radian Corporation's draft report "Development of Procedures to 

Assess the Performance of External Leak Detection Devices: Vapor-Phase ASTMFormatted Methods," June 29, 1990.

Veeder-Root Evaluator: Carnegie Mellon Research Institute

125 Powder Forest Dr. Tel: (412) 268-3495

Simsbury, CT 06070-2003

Tel: (203) 651-2700 Date of Evaluation: 07/24/92
320

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performance of the method or equipment.

Revision Date: April 18, 1997

Vista Research, Inc.

Model LT-100 Version 1.0 Manual Method

LARGE DIAMETER PIPELINE LEAK DETECTOR

Certification: Leak rate of 0.2 gph with PD = 96% and PFA ≤ 4%.

Leak Threshold: 0.177 gph. A leak is declared if the output of the measurement system equals or exceeds 

this threshold. 

Applicability: Gasoline, diesel, aviation fuels, fuel oil #4, waste oil, and 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

Tel: (415) 966-1171 Date of Evaluation: 04/15/96
321

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performance of the method or equipment.

Revision Date: April 18, 1997

Vista Research, Inc.

Model LT-100 Version 1.0 Manual Method

LARGE DIAMETER PIPELINE LEAK DETECTOR

Certification: Leak rate of 0.1 gph with PD = 96% and PFA = 4%.

Leak Threshold: 0.077 gph. A leak is declared if the output of the measurement system equals or exceeds 

this threshold. 

Applicability: Gasoline, diesel, aviation fuels, fuel oil #4, waste oil, and 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

Tel: (415) 966-1171 Date of Evaluation: 04/15/96
322

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performance of the method or equipment.

Revision Date: April 18, 1997

Vista Research, Inc.

Model LT-100 Version 1.0 Primary Method

LARGE DIAMETER PIPELINE LEAK DETECTOR

Certification: Leak rate of 0.2 gph with PD = 97% and PFA ≤ 3%.

Leak Threshold: 0.148 gph. A leak is declared if the output of the measurement system equals or exceeds 

this threshold. 

Applicability: Gasoline, diesel, aviation fuels, fuel oil #4, waste oil, and 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

Tel: (415) 966-1171 Date of Evaluation: 04/15/96
323

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performance of the method or equipment.

 Revision Date: April 18, 1997

Vista Research, Inc.

Model LT-100 Version 1.0 Primary Method

LARGE DIAMETER PIPELINE LEAK DETECTOR

Certification: Leak rate of 0.1 gph with PD = 97% and PFA = 3%.

Leak Threshold: 0.060 gph. A leak is declared if the output of the measurement system equals or exceeds 

this threshold. 

Applicability: Gasoline, diesel, aviation fuels, fuel oil #4, waste oil, and 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, 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

Tel: (415) 966-1171 Date of Evaluation: 04/15/96
324

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performance of the method or equipment.

Revision Date: April 18, 1997

Vista Research, Inc.

Model LT-100 Version 1.0 Segmented Method

LARGE DIAMETER PIPELINE LEAK DETECTOR

Certification: Leak rate of 0.2 gph with PD = 97% and PFA = 3%.

Leak Threshold: 0.174 gph. A leak is declared if the output of the measurement system equals or exceeds 

this threshold. 

Applicability: Gasoline, diesel, aviation fuels, fuel oil #4, waste oil, and 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

Tel: (415) 966-1171 Date of Evaluation: 04/15/96
325

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performance of the method or equipment.

 Revision Date: April 18, 1997

Vista Research, Inc.

Model LT-100 Version 1.0 Segmented Method

LARGE DIAMETER PIPELINE LEAK DETECTOR

Certification: Leak rate of 0.1 gph with PD = 97% and PFA = 3%.

Leak Threshold: 0.074 gph. A leak is declared if the output of the measurement system equals or exceeds 

this threshold. 

Applicability: Gasoline, diesel, aviation fuels, fuel oil #4, waste oil, and 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

Tel: (415) 966-1171 Date of Evaluation: 04/15/96
326

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performance of the method or equipment.

 Revision Date: April 18, 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 leak is declared when leak rate equals or exceeds this threshold.

Applicability: Gasoline, diesel, aviation fuel, and 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

Tel: (401) 846-4747 Date of Evaluation: 12/18/90
327

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performance of the method or equipment.

Revision Date: April 1, 1997

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 water

Detection time (hr:min:sec) 00:06:50 04:14:40 N/A

Fall time (min:sec) N/A* N/A N/A

Lower detection limit (cm) ≤2.54 ≤2.54 N/A

* See glossary.

Specificity Results:

Activated: unleaded gasoline, #2 diesel.

Not Activated: water (in 12 hours).

Comments:

Sensor is activated when hydrocarbon-sensitive wax is dissolved, releasing a spring that activates an alarm.

Detector is not reusable, and must be replaced after contact with hydrocarbons.

Fall time is not applicable, since sensor must be replaced after activating.

Evaluator claims that this sensor will respond to any material that is capable of dissolving the hydrocarbonsensitive wax, but will not respond to water.

Liquid level was set at 1 inch (2.54 cm) during test.

Test procedures used were Ken Wilcox Associates’ “Alternative Test Procedures for Evaluating Leak Detection 

Methods: Evaluation of Liquid Level Sensors,” September 1996.

Warrick Controls, Inc. Evaluator: Ken Wilcox Associates, Inc.

4237 Normandy Court Tel: (816)443-2494

Royal Oak, MI 48073

Tel: (810) 549-4900 Date of Evaluation: 11/18/96
328

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performance of the method or equipment.

Revision Date: April 18, 1997

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 synthetic JP-4

gasoline gasoline 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: unleaded gasoline, synthetic gasoline, n-hexane, JP-4 jet fuel, toluene, xylene(s).

Comments:

Test procedures used were Radian Corporation's draft report "Development of Procedures to 

Assess the Performance of External Leak Detection Devices: Vapor-Phase ASTMFormatted Methods," June 29, 1990.

Warrick Controls, Inc. Evaluator: Carnegie Mellon Research Institute

4237 Normandy Court Tel: (412) 268-3495

Royal Oak, MI 48073

Tel: (810) 549-4900 Date of Evaluation: 09/10/91
329

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performance of the method or equipment.

Revision Date: April 18, 1997

Watson Systems, Inc. (formerly EnviroQuest Technologies Limited)

Enviro Tite SIR 

(also known as SIRAS 99.6)

STATISTICAL INVENTORY RECONCILIATION TEST METHOD (QUANTITATIVE)

Certification: Leak rate of 0.1 gph with PD=99.6% and PFA=0.4%.

Leak Threshold: 0.05 gph. A leak is declared when leak rate equals or exceeds this threshold.

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

Tank Capacity: Maximum of 18,000 gallons. 

Data Requirement: Minimum of 31 days to make an SIR evaluation with minimum 95% confidence 

at the rate of 0.1 gph; 45 to 60 days for greater confidence.

Comments: Not evaluated using manifold tank systems.

Of 41 data sets submitted for evaluation, 5 were not analyzed due to unusable data.

Median monthly throughput for tanks evaluated was 16,700 gallons.

Leak rates ranging from 0.0500 to 0.2043 were used in evaluation.

Data sets evaluated were supplied by evaluator.

Watson Systems, Inc. Evaluator: Midwest Research Institute

4501 Madison Tel: (816) 753-7600

Kansas City, MO 64111

Tel: (816) 756-0774 Date of Evaluation: 04/03/92
330

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performance of the method or equipment.

Revision Date: April 18, 1997

Watson Systems, Inc. (formerly EnviroQuest Technologies Limited)

SIRAS Software System, Version 2.0

STATISTICAL INVENTORY RECONCILIATION TEST METHOD (QUANTITATIVE)

Certification: Leak rate of 0.1 gph with PD = 99.3% and PFA = 0.7%

Version 2.0 is designed to meet annual tests requirements.

Leak Threshold: 0.05 gph. A leak is declared when the calculated leak rate equals or exceeds this 

threshold.

Applicability: Gasoline, diesel, aviation fuel, and 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.

Comments: 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.

Watson Systems, Inc. Evaluator: Midwest Research Institute

4501 Madison Tel: (816) 753-7600

Kansas City, MO 64111

Tel: (816) 756-0774 Date of Evaluation: 08/23/93
331

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performance of the method or equipment.

Revision Date: April 18, 1997

Watson Systems, Inc. (formerly EnviroQuest Technologies Limited)

SIRAS Software System, Version 2.8.3

STATISTICAL INVENTORY RECONCILIATION TEST METHOD (QUANTITATIVE)

Certification: Leak rate of 0.2 gph with PD = 99.999% and PFA = 0.01%.

Version 2.8.3 is designed to meet monthly monitoring requirements.

Leak Threshold: 0.1 gph. A leak is declared when the calculated leak rate equals or exceeds this 

threshold.

Applicability: Gasoline, diesel, aviation fuel, and 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.

Comments: 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.

Watson Systems, Inc. Evaluator: Midwest Research Institute

4501 Madison Tel: (816) 753-7600

Kansas City, MO 64111

Tel: (816) 756-0774 Date of Evaluation: 08/23/93
332

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performance of the method or equipment.

Revision Date: April 18, 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 leak is declared if the output of the measurement system equals or exceeds 

this threshold. 

Applicability: Gasoline, diesel, aviation fuel, fuel oil, waste oil, and 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

Tel: (805) 326-0173 Date of Evaluation: 11/21/90
333

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performance of the method or equipment.

Revision Date: April 18, 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 leak is declared if the output of the measurement system equals or 

exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel, fuel oil, waste oil, and 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 

real-time 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

Tel: (805) 326-1073 Date of Evaluation: 12/20/90
334

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performance of the method or equipment.

Revision Date: April 18, 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 leak is declared if the output of the measurement system equals or 

exceeds this threshold. 

Applicability: Gasoline, diesel, aviation fuel, fuel oil, waste oil, and 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 

real-time 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

Tel: (805) 326-0173 Date of Evaluation: 02/28/92
335

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performance of the method or equipment.

Revision Date: April 18, 1997

Xerxes Corp.

Xerxes Trucheck Hydrostatic Monitoring System

DOUBLE WALLED TANK TIGHTNESS TEST

Certification: Leak rate of 0.1 gph with PD=99% and PFA=1%.

Leak Threshold: 0.05 gph. A leak is declared if the output of the measurement system equals or exceeds

this threshold. 

Applicability: Gasoline, diesel, aviation fuel, and 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

Tel: (612) 887-1890 Date of Evaluation: 01/07/93
336

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performance of the method or equipment.

PART III

 LEAK DETECTION EQUIPMENT

 THIRD PARTY EVALUATIONS

 UNDER REVIEW

 ALPHABETICAL BY VENDOR,

 THEN BY TEST METHOD,

 FINALLY BY EQUIPMENT MODEL,
337

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performance of the method or equipment.

Revision Date: April 18, 1997

Test Method Vendor Equipment Model Evaluator/Date of Evaluation

Automatic Tank Gauge 

(0.1 and 0.2 gph)

Alert Technologies 2000X and 2000XB Ken Wilcox Associates 

02/28/94 and 06/22/94

Continuous ATG Alert Technologies 3000 and 4000 Ken Wilcox Associates 

02/20/92

Line Tightness Test Method Campo/Miller, Inc. PL400 Jetronix Radio Engineering 

Laboratories 05/16/91

Automatic Tank Gauge 

(0.1 and 0.2 gph)

ENRAF B.V.

Delft Instruments

STIC 818 Ken Wilcox Associates

01/02/94

Vapor-Phase Product 

Detector

HNU DL-101; HW-101; ISPI-101; PI-101 Carnegie Mellon Research Institute

11/28/91,02/05/92, 03/05/92

Automatic Tank Gauge 

(0.1 gph)

INCON Intelligent Controls, 

Inc.

TS 1000 Ken Wilcox Associates 

08/05/92

Automatic Tank Gauge

(0.1 gph)

INCON Intelligent Controls, 

Inc.

TS 2000 Ken Wilcox Associates 

05/10/91

Continuous Automatic Tank 

Gauge

INCON Intelligent Controls, 

Inc.

SCALD (Applies to Incon Controller 

Models TS 1000, TS 2000, 

TS 1001,TS 2001

Sensor Model TS-DLP)

Ken Wilcox Associates 

09/14/95

Continuous Automatic Tank 

Gauge

Marley Pump ST1400-1800, ATG, FMS, LLM ADA Technologies

10/12/92

Vapor-Phase Product 

Detector

Mine Safety Appliances Tank-Check Carnegie Mellon Research Institute 

05/31/91

Non-Volumetric Tank 

Tightness Test (Vacuum)

NDE Environmental Corp. U3 Vacuum Ken Wilcox Associates

06/25/96

Statistical Inventory 

Reconciliation (0.2 gph)

SIR International, Inc. Mitchell’s SIR Program (Version 2.7) Ken Wilcox Associates 

6/8/95

Statistical Inventory 

Reconciliation (0.1 gph)

SIR International, Inc. Mitchell’s SIR Program (Version 2.6) Ken Wilcox Associates 

6/8/95

Statistical Inventory 

Reconciliation (Qualitative)

Teledata, Inc. Tankmate Version 3.12 PB Com. Co.

9/29/95

Automatic Tank Gauge 

(0.1 gph)

Tidel Engineering, Inc. EMS 3500 Ken Wilcox Associates

03/16/95

Statistical Inventory 

Reconciliation (0.2 gph)

Triangle Environmental, Inc. TRI SIR (Version 1.01) Ken Wilcox Associates 

8/23/95

Statistical Inventory 

Reconciliation (0.2 gph)

USTMAN Industries, Inc. USTMAN SIR 95.2A Ken Wilcox Associates

12/12/95

Statistical Inventory 

Reconciliation (0.1 gph)

USTMAN Industries, Inc. USTMAN SIR 95.2 Ken Wilcox Associates

12/12/95

Non-Volumetric Tank 

Tightness Test (Vacuum)

SDT-USA SDT Model 150 Ken Wilcox Associates

03/01/96
338

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

performance of the method or equipment.

Statistical Inventory 

Reconciliation (0.1 gph)

Warren Rogers Assoc. SIRA Version 5.2 Ken Wilcox Associates

09/01/96
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Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the 

performance of the method or equipment.

PART IV

ACCEPTABLE TEST PROTOCOLS

 ALPHABETICAL BY TEST METHOD, THEN BY 

PROTOCOL DATE
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performance of the method or equipment.

Automatic Tank Gauging Systems

“Standard Test Procedures for Evaluating Leak Detection Methods: Automatic Tank Gauging Systems”, 

EPA/530/UST-90/006, March 1990

Bulk Tank Testing

“Alternative Test Procedures for Evaluating Leak Detection Methods: Evaluation of Bulk Field-constructed 

Tanks”, Ken Wilcox Associates, February 1996

Continuous In-Tank Leak Detection Systems

“Evaluation Protocol for Continuous In-Tank Leak Detection Systems”, Midwest Research Institute, April 1995

Large Pipeline Leak Detection Systems

“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

Non-volumetric Tank Tightness Testing Methods

“Standard Test Procedures for Evaluating Leak Detection Methods: Non-volumetric Tank Tightness Testing 

Methods”, EPA/530/UST-90/005, March 1990

Pipeline Leak Detection Systems

“Standard Test Procedures for Evaluating Leak Detection Methods: Pipeline Leak Detection Systems”, 

EPA/530/UST-90/010, September 1990
341

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

performance of the method or equipment.

Statistical Inventory Reconciliation Methods

“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 Detectors

“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 Testing Methods

“Standard Test Procedures for Evaluating Leak Detection Methods: Volumetric Tank Tightness Testing 

Methods”, EPA/530/UST-90/004, March 1990
342

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

performance of the method or equipment.

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performance of the method or equipment.

PART V

LEAK DETECTION EQUIPMENT

MAINTENANCE CHECKLISTS
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performance of the method or equipment.

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performance of the method or equipment.

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

performance of the method or equipment.

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.
347

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performance of the method or equipment.

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performance of the method or equipment.

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.
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performance of the method or equipment.

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performance of the method or equipment.

APPENDIX A

GLOSSARY OF TERMS

Accuracy:

The degree to which the measured leak rate agrees with the induced leak rate on the average. If a method 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 consistantly 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 Systems (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 Systems (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 deliverry receipts, for example.

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.
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performance of the method or equipment.

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 devi ce 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 test method 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 method.

Manifold 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. A negative number would indicate that something was being added to the tank. The 

performance of a method 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.

Nominal Leak Rate:

The set or target leak rate to be achieved as closely as possible during the evaluation of a leak detection 

method. It is a positive number expressed in gallons per hour (gph).
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performance of the method or equipment.

GLOSSARY OF TERMS CONTINUED

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.

Total Pressure:

In this document this term equals the sum of the pressure in ullage space and the pressure due to product 

head.
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performance of the method or equipment.

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.