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.

 ALABAMA

 DEPARTMENT OF ENVIRONMENTAL MANAGEMENT

ADEM

August 1, 1996

MEMORANDUM

TO: All Interested Parties

FROM: Curt D. Johnson, Chairperson

RE: National Leak Detection Work Group’s Second Edition List

This Second Edition is the latest available edition of the List of Leak Detection Evaluations as of August 1, 

1996. As planned, the Work Group on Leak Detection Evaluation, with the help of EPA, updates the 

electronic version more frequently than the hard copy. [Note that the original is available in MicroSoft Word 

for Windows, and is better formatted.] A hard copy of this edition is not being produced. The next hard copy 

edition is planned for late 1996, although time required for printing and distribution may place the date into 

early 1997.
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.

UNITED STATES ENVIRONMENTAL PROTECTION AGENCY

WASHINGTON, D.C. 20460

Mail Code 5401G

November 29, 1995

 OFFICE OF SOLID WASTE AND EMERGENCY

 RESPONSE

MEMORANDUM

SUBJECT: List of Leak Detection Evaluations 

FROM: Lisa C. Lund, Acting Director /s/

 Office of Underground Storage Tanks

TO: All Interested Parties

The purpose of this cover memo is to transmit the attached list and to provide additional information 

about its appropriate use and about EPA's involvement with it. 

The List and Its Use

The List of Leak Detection Evaluations is based on reviews by an independent work group 

consisting of state and EPA UST program staff, and therefore is not an EPA list. Furthermore, 

neither EPA nor the work group approve or will approve leak detection systems. 

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

the state environmental agency, which should be contacted regarding the approval or acceptance of 

leak detection systems in a particular area. The evaluations must have been performed by an 

independent third party, in accordance with EPA or equivalent test procedures, and with leak rates 

blind to the evaluator.

The List is divided into parts. The Summary section categorizes leak detection system evaluations 

by type of system. The Specification section is in alphabetical order by name of the vendor. The 

Under Review section lists evaluations about which the work group has received some information, 

and is either reviewing or has requested additional information needed to clarify the evaluation. The 

Glossary section provides definitions of terminology used in the List, which should help everyone 

better understand the information presented in the Specifications section. Listing of an evaluation 

as "under review" in no way implies that the evaluation does or does not meet the review 

criteria.
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.

Neither EPA nor the work group approve or will approve leak detection systems. Approval or 

acceptance of systems is the responsibility of the implementing agency. Please contact your 

implementing agency UST program to determine which leak detection systems are approved or 

acceptable for use in your area.

The List includes evaluations that followed either an EPA protocol, a national voluntary consensus 

standard, or a non-EPA procedure developed by an independent third party. Please note that 

multiple evaluations may exist for one system, and therefore there may be multiple listings for that

system.

We believe that the List will be of great benefit to the entire UST community. However, please 

remember that it has inherent limitations. It is based on evaluations, which are one-time events, 

often conducted in a lab setting according to protocols that do not test all aspects of a system. 

Therefore, appearance on the List does not mean that a particular system will work or comply with 

regulations at any particular site. For these reasons, the List cannot be the final word; decisionmakers should make up their own minds based on all available sources of information.

Distribution

The attached List is the first edition and follows a draft that was widely distributed by this office in 

January. The work group has indicated that the List will be updated periodically, as new evaluations 

and information are reviewed. The most recent version is available for downloading in electronic 

form (Microsoft Word 6.0 and WordPerfect 5.2) from EPA’s "CLU-IN" -- electronic bulletin board 

at no charge. [Go into the “UST/LUST” Special Interest Group, then go to File Directory 11.] You 

can access CLU-IN by modem at (301) 589-8366, with settings 8-N-1 or reach the system operator 

at (301) 589-8368.

 

OUST plans to distribute paper revisions of the List about eve ry six months. Because of the large 

size of the document, to save paper and expense, we will limit distribution. We will send paper 

copies to vendors, associations, EPA UST offices, state UST offices, and others who request it. We 

will send only one copy to each organization at each location. EPA Region 10 is no longer updating 

the list it previously maintained.

Additional information

If you have an evaluation to submit, or if you have comments about the contents of the List, please 

see the attached April 26, 1995 memorandum from the work group’s chair for guidance. As was the 

case for the draft List, comments regarding a particular listing should be made to the appropriate 

team leader for that type of evaluation. Comments and new information are welcomed.

I hope that this package is helpful to you. If you would like to make changes to the address 

information on your envelope, please forward them to David Wiley of my staff, Mail Code 5402W 

or fax number (703) 603-7178.
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.

Attachments:

*April 26, 1995 Johnson memo, with attachments

*Disclaimer

*List of Leak Detection Evaluations 

cc: State UST Contacts

UST/LUST Regional Program Managers

Region 10 Operations Offices' UST/LUST Contacts

Vendors appearing on List of Leak Detection Evaluations

Anthony Tafuri, NRMRL Edison

Members of Work Group on Leak Detection Evaluations

cc (cover only):

Steve Crimaudo, ASTSWMO

Larry Brill, Region 1

Stanley Siegel, Region 2

John Humphries, Region 3

Mary Kay Lynch, Region 4

Willie Harris, Region 5

Willie Kelley, Region 6

Bill Pedicinno, Region 7

Steve Tuber, Region 8

Laura Yoshii, Region 9

Lauris Davies, Region 10

David Lloyd, OGC

Kathy Nam, OGC

OUST Management Team, via LAN
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.

 ALABAMA

 DEPARTMENT OF ENVIRONMENTAL MANAGEMENT

ADEM

April 26, 1995

MEMORANDUM

TO: Vendors of Leak Detection Equipment/Procedures

FROM: Curt D. Johnson, Chairperson

RE: National Leak Detection Work Group’s Draft List of Third-Party Evaluated Leak Detection Equipment/Procedures

By now, all of you should have received a copy of our work group’s draft list. If you have not received a copy, please

contact Lillian Shelton at (703) 308-8859 and she will send you a copy.

The draft list cover letter dated January 17, 1995 from Lisa Lund states that comments on the draft list were due March 1, 

1995. This may be sent to either the appropriate work group team leader (see attached member and team list) or to me at 

the Montgomery letterhead address. We are currently on schedule to provide the first edition list late this summer.

All new evaluations and/or protocols to be evaluated by the work group need to be sent to my attention at the letterhead 

address. 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. Because the EPA 

Region 10 list will no longer be updated and because Mr. Harold Scott of Region 10 has left the work group, third party 

tests should no longer be sent to Region 10 EPA. 

Since the draft list was sent out, the list has 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 plan to send only one copy per company per location in the future. If you received more than 1 copy at 

your location, or if this letter needs to be forwarded, please notify me of the proper person to send future 

correspondence.

The trial posting of the draft documents on EPA’s “CLU-IN” electronic bulletin board was successful and the 

draft list can currently be accessed. We plan to post the first edition list as well. For more information on 

CLU-IN, please call (703) 308-8885 or dial into CLU-IN at (301) 589-8366 with your modem set at 8,N,1.

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

 Document List
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.

WORK GROUP MEMBERS [updated]

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) 270-5612

Mike Kadri Michigan Department of Environmental 

Quality 

UST Division 

PO Box 30157 

Lansing, MI 48909-7657

(517) 335-7204 

Fax (517) 335-2245

Beth DeHaas Maine Department of Environmental 

Protection 

Statehouse Station No. 17 

Augusta, ME 04333

(207) 287-2651 

Fax (207) 287-7826

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

David Wiley USEPA 

401 M St. Southwest 

5402G 

Washington, DC 20460 

(703) 603-7178

Fax (703) 603-9163

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

Thomas Springer Oklahoma Corporation Commission

Fuel Division

PO Box 52000-2000

Oklahoma City, OK 73152-2000

(405) 522-5265 

Fax (405) 521-6576

Ellen Van Duzee USEPA Idaho Operations 

1435 N. Orchard St. 

Boise, ID 83706-2239

(208) 334-9507 

Fax (208) 334-1231

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

Bill Faggart USEPA

401 M St. Southwest

5402G

Washington, DC 20460

(703) 603-7151

Fax (703) 603-9163
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.

TEAM MEMBERS

TEAM LEADER MEMBERS

Volumetric Beth DeHaas Brauksieck

Non-Volumetric Shahla Farahnak Springer

ATG Ellen Van Duzee Brauksieck

SIR Lamar Bradley DeHaas

Kadri

Vapor/Liquid David Wiley Van Duzee 

Pipeline Mike Kadri Farahnak 

Springer

Other See New Protocol 

Team List Below

List Curt Johnson Wiley

 

NEW PROTOCOLS

NEW PROTOCOLS and third-party tests of those protocols will be reviewed by the following 

sub-team members:

PROTOCOL MEMBERS

Liquid Point Sensor David Wiley

Cable Sensors David Wiley, Mike Kadri

Continuous ATG Shahla Farahnak, Mike Kadri

Large Tank ATG Shahla Farahnak, Ellen Van Duzee, Russ Brauksieck 

Large Tank Volumetric Shahla Farahnak, Russ Brauksieck, Beth DeHass 

Vapor/Radian David Wiley

Maintaining Pressure or Vacuum on 

Doublewalled Tanks

Tom Springer, Mike Kadri

Large Pipeline Mike Kadri, Tom Springer
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.

 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.
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.

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/met hod.

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.

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.

Second Edition

LIST OF LEAK DETECTION EVALUATIONS

FOR UNDERGROUND STORAGE TANK (UST) 

SYSTEMS

August 1, 1996
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.

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-90/004X) 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.
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.

SUMMARY SECTION

Revision Date: November 20, 1996

AUTOMATIC ELECTRONIC LINE LEAK DETECTORS

VENDOR EQUIPMENT NAME LEAK RATE/THRESHOLD

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

LS300-120 and LS300-120 XLC 3 gph/2.36 gph

LS300-120 PLUS and LS300-120 PLUS A/S 3 gph/2.36 gph

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

PLUS AL, LSI

3 gph/1.5 gph

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

PLUS AL,LSI

0.2 gph/0.1 gph

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

PLUS AL,LSI

0.1 gph/0.05 gph

Control Engineers Line Leak Detector 

Model LLP2

3.0 gph/1.88 gph

Line Leak Detector 

Model LLP2

0.1 gph/0.05 gph

Emco Electronics, Tuthill 

Corp.

EECO System LLD (Q0011) - Hourly Monitoring Test 3.0 gph/2.0 gph 

EECO System LLD (Q0011) - Monthly Monitoring Test 0.2 gph/0.1293 gph

EECO System LLD (Q0011) - Line Tightness Test 0.1 gph/0.0793 gph

EECO System LLD Flexible Pipelines - Hourly Monitoring 3.0 gph/2.0 gph

EECO System LLD Flexible Pipelines - Line Tightness Test 0.1 gph/0.0793 gph

Gilbarco Environmental 

Products

Environmental Management Console (EMC)

with Line Leak Detector, Series PA02630000501

3.0 gph/1.88gph

Environmental Management Console (EMC)

with Line Leak Detector, Series PA02630000501

3.0 gph/2.4 gph

Environmental Management Console (EMC)

with Line Leak Detector, Series PA02630000501

3.0 gph/1.5 gph

Environmental Management Console (EMC)

with Line Leak Detector, Series PA02630000501

0.2 gph/0.1 gph

Environmental Management Console (EMC)

with Line Leak Detector, Series PA02630000501

0.2 gph/0.1 gph

Environmental Management Console (EMC)

with Line Leak Detector, Series PA02630000501

0.1 gph/0.05 gph

Environmental Management Console (EMC)

with Line Leak Detector, Series PA02630000501

0.1 gph/0.04gph

Environmental Management Console (EMC)

with Line Leak Detector, Series PA02630000501

0.1 gph/0.079 gph
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.

SUMMARY SECTION

Revision Date: November 20, 1996

AUTOMATIC ELECTRONIC LINE LEAK DETECTORS

VENDOR EQUIPMENT NAME LEAK RATE/THRESHOLD

Gilbarco Environmental 

Products

Environmental Management Console (EMC)with Line Leak 

Detector, Series PA02630000501 For Flexible Pipelines

3.0 gph/1.5 gph

Environmental Management Console (EMC)with Line Leak 

Detector, Series PA02630000501 For Flexible Pipelines

0.2 gph/0.1 gph

Environmental Management Console (EMC)with Line Leak 

Detector, Series PA02630000501 For Flexible Pipelines

0.1 gph/0.079 gph

Hasstech LineTite Pipeline Leak Monitor 3.0 gph/2.0 gph

LineTite Pipeline Leak Monitor 0.1 gph/0.062 gph

INCON Intelligent 

Controls, Inc.

TS-LLD Line Leak Detector 3 gph/1.5 gph

TS-LLD Line Leak Detector 0.2 gph/0.1 gph

TS-LLD Line Leak Detector 0.1 gph/0.05 gph

TS-LLD Line Leak Detector 

(for Flexible Pipelines)

3 gph/1.5 gph

TS-LLD Line Leak Detector 

(for Flexible Pipelines)

0.2 gph/0.1 gph

TS-LLD Line Leak Detector 

(for Flexible Pipelines)

0.1 gph/0.05 gph

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

ST1801L

3.0 gph/2.0 gph

Red Jacket PPM 4000, RLM 9000, RLM 10000, ST 1401L, and 

ST1801L

0.2 gph/0.1 gph

Red Jacket PPM 4000, RLM 9000, RLM 10000, ST 1401L, and 

ST1801L

0.1 gph/0.047 gph

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

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

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

Line Integrity Probe and Submersible Pump Controller 

3.0 gph/2.0 gph

LIPSPC-301-0730-001/LIP-301-0729-001

Line Integrity Probe and Submersible Pump Controller 

0.1 gph/0.06 gph

Veeder-Root TLS-350 Line Leak Detector, Series 8475 3.0 gph/2.4 gph

TLS-350 Line Leak Detector, Series 8475 3.0 gph/1.5 gph

TLS-350 Line Leak Detector, Series 8475 0.2 gph/0.1 gph

TLS-350 Line Leak Detector, Series 8475 0.2 gph/0.1 gph
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.

SUMMARY SECTION

Revision Date: November 20, 1996

AUTOMATIC ELECTRONIC LINE LEAK DETECTORS

VENDOR EQUIPMENT NAME LEAK RATE/THRESHOLD

Veeder-Root TLS-350 Line Leak Detector, Series 8475 0.1 gph/0.04 gph

TLS-350 Line Leak Detector, Series 8475 0.1 gph/0.079 gph

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

TLS-350 Line Leak Detector for Flexible Pipelines, Series 8475 0.2 gph/0.1 gph

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

TLS Line Leak Detector, Series 8484 3.0 gph/1.88 gph

TLS Line Leak Detector, Series 8484 0.1 gph/0.05 gph
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.

SUMMARY SECTION

Revision Date: November 20, 1996

AUTOMATIC MECHANICAL LINE LEAK DETECTORS

VENDOR EQUIPMENT NAME LEAK RATE/THRESHOLD

FE Petro, Inc. STP-MLD-E Line (Flexline) Leak Detector 3.0 gph/2.0 gph

STP-MLD Pipeline Leak Detector 3.0 gph/2.0 gph

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

Marley Pump Co. Red Jacket DLD and XLD 3.0 gph/2.0 gph

Red Jacket FX1/FX2 3.0 gph/2.0 gph

Red Jacket FX1/FX2 Flexline 3.0 gph/2.0 gph

Red Jacket FX2/FX2-D and Bigflo 3.0 gph/2.0 gph

Red Jacket XLP 3.0 gph/2.0 gph

Red Jacket XLP for Flexible Lines 3.0 gph/2.0 gph

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

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

Vaporless LD 2000E and LD 2000E-S 3.0 gph/2.0 gph

Vaporless LD 2000T and LD 2000T-S 3.0 gph/2.5 gph

Vaporless LD 3000 and LD 3000S 3.0 gph/2.0 gph
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.

SUMMARY SECTION

Revision Date: November 20, 1996

AUTOMATIC TANK GAUGING SYSTEMS

VENDOR EQUIPMENT NAME LEAK RATE/THRESHOLD/

MAX UST VOLUME

Alert Technologies, Inc. Alert Model 2000 In-Tank Mass Measurement Probe System 0.2 gph/0.1 gph/15,000 gallons

Andover Controls Corp. Andover Infinity CX9000, CX9200, and CMX240 0.1 gph/0.05 gph/15,000 gallons

Andover InfinityCX9000, CX9200, and CMX240 0.2 gph/0.1 gph/15,000 gallons

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

. Encompass USF IPAM #17-901

(Ultrasonic Probe #17-9100)

0.2 gph/0.1 gph/15,000 gallons

EBW Auto-Stik II and Auto-Stik Jr. 0.2 gph/0.1 gph/15,000 gallons

Auto-Stik II and Auto-Stik Jr. 0.1 gph/0.05 gph/15,000 gallons

Egemin Naamloze 

Vennootschap

E’SPI III 0.2 gph/0.075 gph/15,000 gallons

E’SPI IV 0.2 gph/0.1 gph/15,000 gallons

Emco Electronics, Tuthill 

Corp.

EECO System TLM (0.2 gph Precision Test) 0.2 gph/0.1 gph/15,000 gallons

EECO System TLM (0.1 gph Precision Test) 0.1 gph/0.05 gph/15,000 gallons

EECO System TLM (0.2 gph Quick Test) 0.2 gph/0.1 gph/15,000 gallons

EECO System TLM (0.1 gph Quick Test) 0.1 gph/0.05 gph/15,000 gallons

Engineered Systems, Inc. Image II 0.2 gph/0.1 gph/15,000 gallons

Environment and Safety EASI Level-Tru 0.2 gph/0.1 gph/15,000 gallons

Gasboy International Gasboy TMS 500 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

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

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

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

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
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.

SUMMARY SECTION

Revision Date: November 20, 1996

AUTOMATIC TANK GAUGING SYSTEMS

VENDOR EQUIPMENT NAME LEAK RATE/THRESHOLD/

MAX UST VOLUME

INCON Intelligent 

Controls, Inc.

TS 1000 Magnetostrictive Probe 0.2 gph/0.1 gph/15,000 gallons

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

Keekor Environmental 

Products

TankTite Leak Detection Kernel Version 1.0 with Keeprobe K7 

Magnetostrictive Tank Gauge

0.2 gph/0.1 gph/15,000 gallons

Marley Pump Co. Sonic Technology (ST) 1400-1800 Series Tank Monitoring System 

(Ultrasonic Transducer) ATG Automatic Tank Gauging Monitor, 

LLM Series Liquid Level Monitor, FMS Fuel Management Monitor

0.2 gph/0.1 gph/18,000 gallons

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

(Ultrasonic Transducer) ATG Automatic Tank Gauging Monitor, 

LLM Series Liquid Level Monitor, FMS Fuel Management Monitor

0.1 gph/0.05 gph/18,000 gallons

Red Jacket ATM System, Ver. RLM 5000, 5001, and 9000 0.2 gph/0.1 gph/15,000 gallons

Omntec/Electro Levels 

Mfg., Inc.

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

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

Patriot Sensors and 

Controls Corp. 

7021 Digital Tank Gauge 0.2 gph/0.1 gph/15,000 gallons

7021 Digital Tank Gauge 0.1 gph/0.05 gph/15,000 gallons

Petro Vend, Inc. Petrosonic III, Version 4.05 Model 613 (4 inch) Magnetostrictive 

Probe

0.2 gph/0.1 gph/15,000 gallons

Site Sentinel Model II and III Model 613 (2 inch) Magnetostrictive 

Probe

0.2 gph/0.1 gph/15,000 gallons

Site Sentinel Model II and III Model 613 (4 inch) Magnetostrictive 

Probe

0.2 gph/0.1 gph/15,000 gallons

Site Sentinel Model II and III Model 613 (4 inch) Magnetostrictive 

Probe

0.1 gph/0.06 gph/15,000 gallons

Ronan Engineering Co. X-76 ETM and X-76 ETM-4X 0.2 gph/0.1 gph/15,000 gallons

X-76 ETM and X-76 ETM-4X 0.1 gph/0.05 gph/15,000 gallons

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

Series Probes #401-0009 and #401-0010

0.2 gph/0.05 gph/15,000 gallons

Tidel Environmental Monitoring System, EMS 2000, 3000, and 3500 

Series Probes #401-0021 and #401-0022

0.2 gph/0.1 gph/15,000 gallons

Universal Sensors and 

Devices, Inc.

TICS-1000 0.2 gph/0.1 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.

SUMMARY SECTION

Revision Date: November 20, 1996

AUTOMATIC TANK GAUGING SYSTEMS

VENDOR EQUIPMENT NAME LEAK RATE/THRESHOLD/

MAX UST VOLUME

USTest UST 2001 0.1 gph/0.05 gph/15,000 gallons

UST 2001 (Quick Test) 0.2 gph/0.1 gph/15,000 gallons

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

7842 Digital Sensing Capacitance Probe

0.2 gph/0.1 gph/15,000 gallons

TLS-200/200i/300/400 UST ATGS with 

8472 Digital Sensing Capacitance Probe

0.2 gph/0.126 gph/15,000 gallons

TLS-200/200i/300/400 UST ATGS with 

8472 Digital Sensing Capacitance Probe

0.1 gph/0.071 gph/15,000 gallons

TLS-200/200i/250/250i/300/350/400 UST ATGS with 

8473 Digital Sensing Magnetostrictive Probe

0.2 gph/0.093 gph/15,000 gallons

TLS-200/200i/250/250i/300/350/400 UST ATGS with 

8473 Digital Sensing Magnetostrictive Probe

0.1 gph/0.071 gph/15,000 gallons

Veeder-Root 3000 Tank Level Module – version TLP2 

Normal/Rapid Test Mode - Magnetostrictive Probe

0.2 gph/0.1 gph/15,000 gallons

Veeder-Root 3000 Tank Level Module – version TLP2 

Normal/Rapid Test Mode - Magnetostrictive Probe

0.1 gph/0.05 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.

SUMMARY SECTION

Revision Date: November 20, 1996

DOUBLE WALLED TANK TIGHTNESS TESTS

VENDOR EQUIPMENT NAME LEAK RATE/THRESHOLD/

MAX UST VOLUME

Fluid Containment, Inc.

(formerly O/C Tanks 

Corp.)

Hydrostatic Precision Tank Test for DWT-Type II Tanks 0.1 gph/0.05 gph without dispensing 

and 0.7 gph with dispensing/30,000 

gallons

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

SUMMARY SECTION

Revision Date: November 20, 1996

LARGE DIAMETER PIPELINE LEAK DETECTORS

VENDOR EQUIPMENT NAME LEAK RATE/THRESHOLD

EFA Technologies, Inc. LeakNet 3.0 gph/2.2 gph
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.

SUMMARY SECTION

Revision Date: November 20, 1996

LINE TIGHTNESS TEST METHODS

VENDOR EQUIPMENT NAME LEAK RATE/THRESHOLD

Hasstech AcuRite 0.1 gph/0.01 gph

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

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

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

Lab One Analytical, Inc. Search 0.05 gph/Detection of tracer 

chemical.

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

. PTK-88 0.1 gph/0.05 gph

Tanknology Corp. 

International

TLD-1 0.1 gph/0.05 gph

Tracer Research Corp. Tracer Tight Line Test 0.1 gph/Detection of tracer chemical.

Western Environmental 

Resources

Model PLT-100R 0.1 gph/0.05 gph
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.

SUMMARY SECTION

Revision Date: November 20, 1996

LIQUID-PHASE INTERSTITIAL DETECTORS

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

Emco Electronics, Tuthill 

Corp.

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

Proximity probes

thermal conductivity, prox imity switch

Gilbarco Environmental 

Products

PA02590XXX000 float switch

PA02591144000 float switch

PA02592000000 float switch

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

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

electrical conductivity

PermAlert PAL-AT Models AT20C, AT50C, AT40K

PHL Hydrocarbon Sensor

electrical conductivity

TankWatch Models PHM10, PHMS Combination 

Hydrocarbon/Water Probe

electrical conductivity

TankWatch Models PHM10, PHMS Hydrocarbon Probe electrical conductivity

Petro Vend, Inc. Petrosentry IV, Petrosentry VIII, SiteSentinel Liquid Sensor thermal conductivity

Petrosentry IV, Petrosentry VIII, SiteSentinel Universal

Reservoir Sensor

float switch

Petrosentry IV, Petrosentry VIII, SiteSentinel Universal

Sump Sensor

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 Monitoring Well Probes Part 301-0642 magnetic switch/float and 

hydrocarbon sensitive polymer

EMS-3500 with Liquid Discriminatory Probes Part 301-0635 electrical conductivity/hydrocarbon 

sensitive polymer

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-350 Discriminating Insterstitial Liquid Sensor capacitance change/ultrasonic

TLS-350

Dispenser Pan Sensors and Containment Sump Sensors

electrical conductivity/ultrasonic

TLS-350

Dual and Single Stage Hydrostatic Sensors

float switch
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.

SUMMARY SECTION

Revision Date: November 20, 1996

LIQUID-PHASE INTERSTITIAL DETECTORS

VENDOR EQUIPMENT NAME OPERATING PRINCIPLE

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

Interstitial Liquid Sensor for Fiberglass Tanks (0794390-401) 

float switch

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

Interstitial Liquid Sensor for Steel Tanks (0794390-420)

float switch

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

Liquid Sensor for Sumps (0794390-206) 

float switch

TLS-350

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

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

product permeable/ultrasonic/float 

switch
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.

SUMMARY SECTION

Revision Date: November 20, 1996

LIQUID-PHASE OUT-OF-TANK PRODUCT DETECTORS

VENDOR EQUIPMENT NAME OPERATING PRINCIPLE

Advanced Tank 

Technology, Inc.

Leak Tracer Dye (LTD), LTD Systems, Inc. product solubility - color development

Agar Corp. LEAKWISE Groundwater Monitor ID-220 Series 

Hydrocarbon on Water Detector System

radio frequency (RF) attenuation

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

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

In-Situ, Inc. Leak Detection Systems, KW-140 / KW-240 Monitors with Type 1 

Sensor

product soluble

Leak Detection Systems, KW-140 / KW-240 Monitors with Type 2 

Sensor

product soluble

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

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

PAL-AT Models AT20C, AT50C, AT40K

with PHFW Hydrocarbon Probe and Type 1 Sensor

product soluble

PAL-AT Models AT20C, AT50C, AT40K

with PHFW Hydrocarbon Probe and Type 2 Sensor

product soluble

PAL-AT Models AT20C, AT50C, AT40K TFH Hydrocarbon Sensor 

Cable

impedance change

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

Raychem Corp. TraceTek Alarm and Locator Modules TT502 Fuel Sensing Cable electrical conductivity

Tidel Engineering, Inc. EMS-3500with Monitoring Well Probes Part 301-0641 conductivity via resistor ladder 

network

EMS-3500with Sheen Probes Part 301-0687 electrical conductivity/hydrocarbon 

sensitive polymer

EMS-3500 Tidel Detector No. 301-0762 electrical conductivity/hydrocarbon 

sensitive polymer

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

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
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.

SUMMARY SECTION

Revision Date: November 20, 1996

NON-VOLUMETRIC TANK TIGHTNESS TEST METHODS(TRACER)

VENDOR EQUIPMENT NAME LEAK RATE/THRESHOLD

Lab One Analytical, Inc. Search 0.05 gph/Detection of tracer 

chemical.

Tracer Research Corp. Tracer Tight 0.1 gph/ Detection of tracer chemical.
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.

SUMMARY SECTION

Revision Date: November 20, 1996

NON-VOLUMETRIC TANK TIGHTNESS TEST METHODS(ULLAGE)

VENDOR EQUIPMENT NAME LEAK RATE/THRESHOLD/

MAX UST ULLAGE VOLUME

Alert Technologies, Inc. Alert Ullage System Model 1050 (1.5 psi and –1.0 psi) 0.1 gph/ Ultrasonic signal when the tank 

is under pressure or vacuum is 

compared to background signal (prior to 

pressurization)./6,000 gallons

Alert Ullage System Model 1050 X (-1.5 psi) 0.1 gph/ Ultrasonic signal when the tank 

is under vacuum is compared to 

background signal (prior to vacuum). 

/24,000 gallons

NDE Environmental Corp. UTS-4T Ullage Test 0.1 gph/Make-up gas flow rate into 

ullage exceeding 0.275 cubic 

feet/hour./7,500 gallons

UST Ullage Test - Version ProEco U2 0.1 gph/Pressure decay trend not to 

exceed ± 0.016 psi/hr./10,260 gallons

U3 Ullage Test (Vacuum or Pressure) 0.1 gph/A leak is declared if the noise 

signal detected is different from the 

baseline. (Baseline is the noise signal 

before pressure or vacuum is applied to 

tank.)/16,500 gallons

Triangle Environmental, 

Inc.

TEI Ullage Test, Version 1.00 0.1 gph/An increase in the acoustical 

noise level of the tank under vacuum 

due to air or water ingress indicates a 

leak./15,000 gallons

USTest UST 2000/U (2.0 psi and –1.0 psi)) 0.1 gph/A substantial increase in the 

noise signal (under vacuum or 

pressure) over the background signal 

(no pressure or vac uum applied) in the 

frequency interval of 10 kHz to 20 kHz 

is declared a leak./7,550 gallons for 

+2psig test and 5,250 gallons for –1.0 

psig test 
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.

SUMMARY SECTION

Revision Date: November 20, 1996

NON-VOLUMETRIC TANK TIGHTNESS TEST METHODS(VACUUM)

VENDOR EQUIPMENT NAME LEAK RATE/THRESHOLD/

MAX UST VOLUME

Horner Creative Products EZY 3 0.1 gph/ A leak is declared when the 

pressure decay is more than 1 inch 

water column pressure (inch H2O)

for non-volatile products and 10% of 

the lower determined pres sure for 

volatile products. A leak is also 

declared if any water incursion is 

detected. /12,000 gallons

Tanknology Corp. 

International

VacuTect 0.1 gph/ A leak is declared if any air 

or water incursion is detected. Sonic 

emission of air ingress in the ullage 

area (above product level); sonic 

emission of bubbles formed by air 

ingress in product-filled portion of the 

tank; accumulation of water in bottom 

of tank from water ingress./75,000 

gallons

Triangle Environmental, 

Inc.

TEI System 5000, Version 1.0 0.1 gph/ A leak is declared if the 

acoustical noise level of the tank 

under vacuum is greater than the 

calibrated noise level (which is taken 

without vacuum)./20,000 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.

SUMMARY SECTION

Revision Date: November 20, 1996

STATISTICAL INVENTORY RECONCILIATION TEST METHODS(QUALITATIVE)

VENDOR EQUIPMENT NAME LEAK RATE/THRESHOLD/

MAX UST 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

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
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.

SUMMARY SECTION

Revision Date: November 20, 1996

STATISTICAL INVENTORY RECONCILIATION TEST METHODS(QUANTITATIVE)

VENDOR EQUIPMENT NAME LEAK RATE/THRESHOLD/

MAX UST 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

Environmental 

Management 

Technologies

SIRTECH 0.1 gph/0.05 gph/18,000 gallons

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

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 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

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

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

SUMMARY SECTION

Revision Date: November 20, 1996

VAPOR PHASE OUT-OF-TANK PRODUCT DETECTORS

VENDOR EQUIPMENT NAME OPERATING PRINCIPLE

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

. 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

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 Version: P/N 481532 S/N 03095 metal oxide semiconductor

Tankgard VIII Version: P/N 488803 S/N 00389 metal oxide semiconductor

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

Petrosentry TLD III metal oxide semiconductor

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

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
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.

SUMMARY SECTION

Revision Date: November 20, 1996

VOLUMETRIC TANK TIGHTNESS TEST METHODS(OVERFILL)

VENDOR EQUIPMENT NAME LEAK RATE/THRESHOLD/

MAX UST VOLUME

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

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

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

Leak Detection Systems, 

Inc.

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

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

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

Tank Automation, Inc. Automated Precision Tank Testing System (APTT System) 

R-2

0.1 gph/0.05 gph/15,000 gallons

Western Environmental 

Resources

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

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

SUMMARY SECTION

Revision Date: November 20, 1996

VOLUMETRIC TANK TIGHTNESS TEST METHODS(UNDERFILL)

VENDOR EQUIPMENT NAME LEAK RATE/THRESHOLD/

MAX VOLUME

Alert Technologies, Inc. Alert Model 1000 0.1 gph for 2 hr test and 0.2 gph for 4 

hr test/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

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

Triangle Environmental, 

Inc.

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

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

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

SPECIFICATION SECTION

ALPHABETICAL BY COMPANY,

THEN BY TEST METHOD,

NEXT BY EQUIPMENT MODEL,

FINALLY BY LEAK RATE
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: November 22, 1995

Advanced Tank Technology, Inc.

Leak Tracer Dye (LTD)

LTD Systems, Inc.

LIQUID-PHASE OUT-OF-TANK PRODUCT DETECTOR

Detector:

Output type: qualitative

Sampling frequency: intermittent

Operating principle: product solubility - color development

Test Results:

synthetic commercial

gasoline gasoline

Accuracy (%) 100 (above 8 ppm) 100 (above 23 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: commercial gasoline, n-hexane, diesel fuel, jet-A fuel, JP-4 jet fuel, synthetic gasoline, 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 of product, which is 0.32 cm. 

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

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
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: November 22, 1995

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:

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

Manufacturer’s specifications:

Operating range:

 

Resolution : 0.5 mm of hydrocarbon on water or brine

Variation : water 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 of product, which is 0.32 cm.

This 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
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: November 22, 1995

Alert Technologies, Inc.

Alert Model 2000 In-Tank Mass Measurement Probe System

AUTOMATIC TANK GAUGING SYSTEM

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

based on a one-hour test).

Leak Threshold: 0.1 gph (a leak is declared if the output of the measurement system exceeds this 

threshold). 

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

Capacity: The maximum tank capacity is 15,000 gallons.

The tank must be between 50 and 95% full.

Waiting Time: Minimum waiting time between product delivery to tank and test data collection must be 

15 hours.

There must be no product delivery during the test waiting time.

Test Period: The minimum data collection time must be 2 hours. 

Test must be acquired and recorded by computer. 

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

There must be no dispensing or product delivery during test.

Temperature: Displacer probe measures mass of product and is immune to product temperature changes. 

Therefore, no temperature measurements are required with this ATGS. 

Water Sensor: A water sensor must be used to detect water incursion.

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

Minimum change in water level that can be detected 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.

This is a battery operated system 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). 

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

Comments: This equipment was not evaluated using manifold tank systems.

This equipment only tests the portion of the tank containing product.

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

lower head pressure).

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

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

Rolling Meadows, IL 60008

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

Revision Date: November 22, 1995

Alert Technologies, Inc.

Alert Ullage System Model 1050 (1.5 psi and –1.0 psi) 

NON-VOLUMETRIC TANK TIGHTNESS TEST METHOD (ULLAGE)

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

Leak Threshold: Ultrasonic signal when the tank is under pressure or vacuum is compared to background 

signal (prior to pressurization).

A leak is declared if the ratio 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.

Capacity: The maximum ullage volume is 6,000 gallons.

Waiting time: There is no waiting time after product delivery if the test is conducted after an underfilled 

tank tightness test.

Test Period: The minimum data collection time is 5 minutes.

The test data must be acquired and recorded by a computer.

Test Pressure: A net pressure of 1.5 psi (or -1.0 psi) in the ullage of the tank is maintained. 

Tank system must be able to maintain pressure or vacuum with a loss of less than 

0.4 psig.

Groundwater: Depth to groundwater in must be determined. If water table is present outside the ullage 

portion of the tank, vacuum-ullage test must not be used; Pressure-ullage test must be 

done under a net outward pressure of 1.5 psi.

Calibration: Equipment is calibrated before each test.

Comments: This test method only tests the ullage portion of the tank, the product-filled portion of the 

tank must be tested with an underfilled test method.

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

method.

When testing with vacuum, this test method may not be effective in some backfill 

because some backfill (such as clay) may plug a hole in the tank.

Manifold tanks are isolated prior to the test.

During the third-party evaluation, unleaded gasoline was used.

During the third-party evaluation, microphone was located 25 feet away from the leak 

simulator.

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
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: November 22, 1995

Alert Technologies, Inc.

Alert Ullage System Model 1050 X (-1.5 psi)

NON-VOLUMETRIC TANK TIGHTNESS TEST METHOD (ULLAGE)

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

Leak Threshold: Ultrasonic signal when the tank is under vacuum is compared to background signal (prior 

to vacuum).

A leak is declared if the ratio 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.

Capacity: The maximum ullage volume is 24,000 gallons.

Waiting time: There is no waiting time after product delivery if the test is conducted after an underfilled 

tank tightness test.

Test Period: The minimum data collection time is 5 minutes.

The test data must be acquired and recorded by a computer.

Test Pressure: A net pressure of 1.5 psi (or -1.0 psi) in the ullage of the tank is maintained. 

Tank system must be able to maintain pressure or vacuum with a loss of less than 

0.4 psig.

Groundwater: Depth to groundwater in must be determined. If water table is present outside the ullage 

portion of the tank, vacuum-ullage test must not be used; Pressure-ullage test must be 

done under a net outward pressure of 1.5 psi.

Calibration: Equipment is calibrated before each test.

Comments: This test method only tests the ullage portion of the tank, the product-filled portion of the 

tank must be tested with an underfilled test method.

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

method.

When testing with vacuum, this test method may not be effective in some backfill 

because some backfill (such as clay) may plug a hole in the tank.

Manifold tanks are isolated prior to the test.

During the third-party evaluation, #4 fuel oil was used.

During the third-party evaluation, microphone was located 25 feet away from the leak 

simulator.

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
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: November 22, 1995

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 and 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 exceeds this 

threshold). 

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

compatible products. 

Capacity: The maximum tank capacity is 30,000 gallons.

This equipment is capable of testing a tank at product levels from 20 to 95% full.

Waiting time: Minimum waiting time between delivery and the beginning of the test data collection must 

be at least 1 hour.

Minimum waiting time after dispensing is 1 minute.

There must be no product delivery during the test waiting time.

Test Period: The minimum data collection time must be 4 hours to achieve PD of 99.8% and PFA of 

0.2% and 2 hours to achieve PD of 98.2% and PFA of 1.8%.

Test data must be 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 product delivery during test.

Temperature: Temperature is not measured because this system is based on mass measurement which 

is not affected by temperature. 

Groundwater: Depth to the water table present in the backfill must be determined, and if it is above the 

bottom of the tank, product level must be adjusted to provide a minimum of 2 psi net 

pressure on the bottom of the tank.

Calibration: The load cell must be calibrated before each test.

Comments: This system was not evaluated using manifold tank systems.

This system tests only the portion of tank containing product.

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

lower head pressure).

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: 04/26/91
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: November 22, 1995

Andover Controls Corp.

Andover Infinity

CX9000, CX9200, and CMX240

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 exceeds this 

threshold). 

Applicability: Gasoline, diesel, aviation fuel, fuel oils #4 and #6, solvents and other compatible products 

with known coefficients of expansion and density.

Capacity: The maximum tank capacity is 15,000 gallons.

The tank must be between 50 and 95% full.

Waiting Time: Minimum waiting time between delivery to the tank and the test data collection must be 6 

hours.

Minimum waiting time after dispensing is 3 hours.

There must be no product delivery during the test waiting time.

Test Period: The minimum data collection time must be 6 hours.

Test data is 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 product delivery during the test.

Temperature: A minimum of 3 Resistance Temperature Detectors must be used to determine the average 

temperature of the stored product. 

Water Sensor: A water sensor must be used to detect water incursion.

Minimum water level detectable in the tank is 0.35 inches.

Minimum detectable change in water level is 0.003 inches.

Calibration: Temperature sensors and probe must be checked and calibrated in accordance with 

manufacturer's instructions.

Comments: This equipment was not evaluated using manifold tank systems.

This equipment tests only the portion of the tank that contains product.

As the product level is lowered the leak rate in a leaking tank decreases (due to

lower head pressure).

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
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: November 22, 1995

Andover Controls Corp.

Andover Infinity CX9000, CX9200, and CMX240

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 exceeds this 

threshold). 

Applicability: Gasoline, diesel, aviation fuel, fuel oils #4 and #6, solvents and other compatible products 

with known coefficients of expansion and density.

Capacity: The maximum tank capacity is 15,000 gallons.

The tank must be between 50 and 95% full.

Waiting Time: Minimum waiting time between delivery to the tank and the data collection must be 6 

hours.

Minimum waiting time after dispensing must be 3 hours.

There must be no product delivery during the test waiting time.

Test Period: The minimum data collection time must be 6 hours.

Test data is 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 product delivery during the test.

Temperature: A minimum of 3 Resistance Temperature Detectors must be used to determine the average 

temperature of the stored product. 

Water Sensor: A water sensor must be used to detect water incursion.

Minimum water level detectable in the tank is 0.35 inches.

Minimum detectable change in water level is 0.003 inches.

Calibration: Temperature sensors and probe must be checked and calibrated in accordance with 

manufacturer's instructions.

Comments: This equipment was not evaluated using manifold tank systems.

This equipment tests only the portion of the tank that contains product.

As the product level is lowered the leak rate in a leaking tank decreases (due to

lower head pressure).

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
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: November 22, 1995

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 exceeds this 

threshold). 

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

Capacity: The maximum tank capacity is 15,000 gallons.

The tank must be between 50 and 95% full.

Waiting Time: Minimum waiting time between delivery to the tank and test data collection must be 6 

hours.

Minimum waiting time after normal pumping must be 4 hours.

There must be no product delivery during the test waiting time.

Test Period: The minimum data collection time must be 6 hours.

Test data is 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 product delivery during the test.

Temperature: A minimum of 3 Resistance Temperature Detectors must be used to determine the average 

temperature of the stored hazardous substance. 

Water Sensor: A water sensor must be used to detect water incursion.

Minimum water level detectable in the tank is 0.99 inches.

Minimum detectable change in water level is 0.01 inches.

Calibration: Temperature sensors and probe must be checked and calibrated in accordance with 

manufacturer's instructions.

Comments: This equipment was not evaluated using manifold tank systems.

This equipment tests only the portion of the tank that contains product.

As the product level is lowered the leak rate in a leaking tank decreases (due to

lower head pressure).

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
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: November 22, 1995

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 = 2.20%.

Leak Threshold: 0.1 gph (a leak is declared if the output of the measurement system exceeds this 

threshold).

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

products which are compatible with the probe. 

Capacity: The maximum tank capacity is 15,000 gallons.

The tank must be between 50 and 95% full.

Waiting Time: The minimum waiting period between delivery to the tank and test data collection must be 

3 hours.

There must be no dispensing or product delivery during the test waiting time.

Test Period: The minimum data collection time must be 6 hours.

Test data must be 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 product delivery during the test.

Temperature: A minimum of 5 Resistance Temperature Detectors must be used to determine the average 

temperature of the stored substance. 

Water Sensor: A water sensor must be used to detect water incursion.

Minimum water level detectable in the tank is 1.29 inches.

Minimum change in water level that can be detected is 0.0034 inches.

Calibration: Temperature sensors and probe must be checked and calibrated in accordance with 

manufacturer's instructions.

Comments: This equipment was not evaluated using manifold tank systems.

This equipment tests only the portion of the tank that contains product.

As the product level is lowered the leak rate in a leaking tank decreases (due to

lower head pressure).

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
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: November 22, 1995

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 exceeds this 

threshold). 

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

products which are compatible with the probe. 

Capacity: The maximum tank capacity is 15,000 gallons.

The tank must be between 50 and 95% full.

Waiting Time: The minimum waiting period between delivery to the tank and test data collection must be 

3 hours.

There must be no dispensing or product delivery during the test waiting time.

Test Period: The minimum data collection time must be 6 hours.

Test data must be 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 product delivery during the test.

Temperature: A single sensor measures change in ultrasonic wave velocity to determine the average 

temperature of the stored substance. 

Water Sensor: A water sensor must be used to detect water incursion.

Minimum water level detectable in the tank is 1.86 inches.

Minimum change in water level that can be detected is 0.012 inches.

Calibration: Temperature sensors and probe must be checked and calibrated in accordance with 

manufacturer's instructions.

Comments: This equipment was not evaluated using manifold tank systems.

This equipment tests only the portion of the tank that contains product.

As the product level is lowered the leak rate in a leaking tank decreases (due to

lower head pressure).

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
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: November 22, 1995

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:

commercial

gasoline

synthetic 

gasoline #2 diesel 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

Specificity Results:

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

 

*Only 17-143A was tested with toluene.

** See glossary

Comments:

EPA and many states require detection of 1/8 inch of product, which is 0.32 cm, for groundwater 

monitoring. 

The detectors are listed as interstitial due to intended use. 

Evaluation followed 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: Non-Volumetric Tank Tightness Testing Methods," March 1990. 

These detectors are reusable. 

Although ENCOMPASS APAM (Accessory Probe Access Module) was not included in evaluations, the 

probes perform in the same manner when connected to any one of these three systems, according to the 

manufacturer.

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
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.

Revision Date: November 22, 1995

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:

commercial synthetic

gasoline gasoline JP-4 JP-5

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 (%):

Commercial gasoline 170

n-hexane 110

JP-4 jet fuel 90

synthetic gasoline 110

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 those in 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
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: November 22, 1995

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*

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.

** See glossary.

Specificity Results:

Activated: diesel fuel, JP-8.

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 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
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: November 22, 1995

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 exceeds this 

threshold). 

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

Specification: System is installed on pressurized fiberglass and/or steel piping.

The piping system must not exceed 35.36 gallons.

Tests are conducted at the line operating pressure.

Waiting Time: There is no waiting time between product delivery and testing.

There is no waiting time between last dispensing and testing.

Test Period: Minimum data collection time is 10 seconds.

Test data is acquired and recorded by the microprocessor.

System Features: This system is permanently installed on the piping and automatically tests the line.

It uses a preset threshold and a single test to determine whether the pipeline is leaking.

If a leak is declared, this system will energize an indicator light, trigger an audible alarm, 

and shut down the dispensing system.

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 
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: November 22, 1995

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 exceeds this 

threshold). 

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

Specification: System is installed on pressurized fiberglass and/or steel piping.

The piping system must not exceed 35.36 gallons.

Tests are conducted at the line operating pressure.

Waiting Time: There is no waiting time between product delivery and testing.

There is no waiting time between last dispensing and testing.

Test Period: Minimum data collection time is 10 seconds, but can be adjusted between 10 and 150 

seconds depending on the bulk modulus of the piping system.

Test data is acquired and recorded by the microprocessor.

System Features: This system is permanently installed on the piping and automatically tests the line.

It uses a preset threshold and a single test to determine whether the pipeline is leaking.

If a leak is declared, this system will energize an indicator light, trigger an audible alarm, 

and shut down the dispensing system.

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
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: November 22, 1995

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 exceeds this 

threshold). 

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

Specification: System is installed on pressurized fiberglass and/or steel piping.

The piping system must not exceed 35.36 gallons.

Tests are conducted at the line operating pressure.

Waiting Time: There is no waiting time between product delivery and testing.

There is no waiting time between last dispensing and testing.

Test Period: Minimum data collection time is 10 seconds, but can be adjusted between 10 and 150 

seconds depending on the bulk modulus of the piping system.

Test data is acquired and recorded by the microprocessor.

System Features: This system is permanently installed on the piping and automatically tests the line.

It uses a preset threshold and a single test to determine whether the pipeline is leaking.

If a leak is declared, this system will energize an indicator light, trigger an audible alarm, 

and shut down the dispensing system.

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
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.

Revision Date: November 22, 1995

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 exceeds this 

threshold). 

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

Specification: System is installed on pressurized fiberglass and/or steel piping.

The piping system must not exceed 163 gallons.

Tests are conducted at the line operating pressure.

Waiting Time: There is no waiting time between product delivery and testing.

There is no waiting time between last dispensing and testing.

Test Period: Minimum data collection time is 10 minutes.

Test data is acquired and recorded by the microprocessor.

System Features: This system is permanently installed on the piping and automatically tests the line every 

45 minutes.

It uses a preset threshold and conducts 3 tests to determine whether the pipeline is 

leaking.

If a leak is declared, this system will energize an indicator light, trigger an audible alarm, 

and shut down the dispensing system.

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
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: November 22, 1995

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 exceeds this 

threshold). 

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

Specification: System is installed on pressurized fiberglass and/or steel piping.

The piping system must not exceed 163 gallons.

Tests are conducted at the line operating pressure.

Waiting Time: There is no waiting time between product delivery and testing.

The waiting time between last dispensing and testing is 3 hours.

Test Period: Minimum data collection time is 25 minutes.

Test data is acquired and recorded by the microprocessor.

System Features: This system is permanently installed on the piping and automatically tests the line when 

the pump has been idle for 3 hours.

It uses a preset threshold and conducts 3 tests to determine whether the pipeline is 

leaking.

If a leak is declared, this system will energize an indicator light, trigger an audible alarm, 

and shut down the dispensing system.

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
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: November 22, 1995

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 exceeds this 

threshold). 

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

Specification: System is installed on pressurized fiberglass and/or steel piping.

The piping system must not exceed 163 gallons.

Tests are conducted at the line operating pressure.

Waiting Time: There is no waiting time between product delivery and testing.

The waiting time between last dispensing and testing is 6 hours.

Test Period: Minimum data collection time is 34 minutes.

Test data is acquired and recorded by the microprocessor.

System Features: This system is permanently installed on the piping and automatically tests the line when 

the pump is off for 6 hours.

It uses a preset threshold and conducts 3 tests to determine whether the pipeline is 

leaking.

If a leak is declared, this system will energize an indicator light, trigger an audible alarm, 

and shut down the dispensing system.

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
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: November 22, 1995

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 exceeds this threshold).

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

Capacity: Maximum tank capacity is 18,000 gallons.

Data Requirement: Minimum of 30 days of usable product level and flow through data are required.

Comments: Of the 41 data sets presented for evaluation, only 24 were analyzed.

Seventeen data sets were not analyzed.

The median monthly throughput for tanks used in this evaluation was 2,340 gallons.

Leak rates of 0.05, 0.1, and 0.2 gph were used in this evaluation.

Data sets used in this evaluation were supplied by the evaluator.

This evaluation did not include data from manifolded tanks.

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
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: November 22, 1995

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 exceeds this 

threshold). 

Applicability: Gasoline, diesel, and aviation fuel.

Specification: System is installed on pressurized fiberglass and steel piping.

The piping system volume must not exceed 89 gallons.

Tests are conducted at the line operating pressure.

Waiting Time: No waiting time between product delivery and testing.

No waiting time between last dispensing and testing.

Test Period: Data collection time (response time) is about 10 seconds.

Test data must be acquired and recorded by a permanently installed microprocessor.

Calcualtions are automatically done by the microprocessor.

System Features: This system is permanently installed on the piping and automatically tests the line.

It uses a preset threshold and a single test to determine whether the pipeline is leaking.

If a leak is declared, this system displays a message, triggers an alarm, and shuts down 

the dispensing system.

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

manufacturer's instructions.

Comments: This equipment is no longer produced 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
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: November 22, 1995

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 exceeds this 

threshold). 

Applicability: Gasoline, diesel, and aviation fuel.

Specification: System is installed on pressurized fiberglass and steel pipelines.

The piping system volume must not exceed 89 gallons.

Tests are conducted at the line operating pressure.

Waiting Time: There is no waiting period between product delivery and testing. 

Minimum waiting period between dispensing of product through the piping and testing is 

15 minutes.

Test Period: Minimum data collection time is 30 minutes.

Test data must be acquired and recorded by a permanently installed microprocessor.

Calculations are automatically done by the microprocessor.

System Features: This system is permanently installed on the piping and automatically tests the line.

It uses a preset threshold and a single test to determine whether the pipeline is leaking.

If a leak is declared, this system displays a message, triggers an alarm, and shuts down 

the dispensing system.

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

manufacturer's instructions.

Comments: This equipment is no longer produced 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
48

Appearance on this list is 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: November 22, 1995

EBW, INC.

Auto-Stik II and Auto-Stik Jr.

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 exceeds

this threshold). 

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

products with known coefficients of expansion and densities. 

Capacity: The maximum tank capacity is 15,000 gallons.

The tank must be between 50 and 95% full.

Waiting Time: The minimum waiting period between delivery and testing is 6 hours.

The minimum waiting period between dispensing and testing is 6 hours.

There must be no product delivery during the test waiting time.

Test Period: The minimum data collection time must be 4 hours.

Test data must be acquired and recorded by a computer. 

Leak rate is calculated from average of subsets of all data collected.

There must be no dispensing or product delivery during the test.

Temperature: Minimum of 5 thermistors must be used to determine the average temperature of the stored 

substance. 

Water Sensor: A water sensor must be used to detect water incursion.

Minimum water level detectable in the tank is 0.49 inches.

Minimum detectable water level change is 0.0052 inches.

Calibration: Temperature sensors and probe must be checked and calibrated in accordance with 

manufacturer's instructions.

Comments: This equipment was not evaluated using manifold tank systems.

This equipment tests only the portion of the tank that contains product.

As the product level is lowered the leak rate in a leaking tank decreases (due to

lower head pressure).

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
49

Appearance on this list is 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: November 22, 1995

EBW, INC.

Auto-Stik II and Auto-Stik Jr.

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 exceeds

this threshold). 

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

products with known coefficients of expansion and densities. 

Capacity: The maximum tank capacity is 15,000 gallons.

The tank must be between 50 and 95% full.

Waiting Time: Minimum waiting time between delivery to the tank and test data collection must be 6 

hours.

Minimum waiting time after dispensing is 2 hours.

There must be no dispensing or product delivery during the test waiting time.

Test Period: The minimum data collection time must be 4 hours.

Test data must be acquired and recorded by a computer. 

Leak rate is calculated from average of subsets of all data collected.

There must be no dispensing or product delivery during the test.

Temperature: Minimum of 5 thermistors must be used to determine the average temperature of the stored 

substance. 

Water Sensor: A water sensor must be used to detect water incursion.

Minimum water level detectable in the tank is 0.49 inches.

Minimum detectable water level change is 0.0052 inches.

Calibration: Temperature sensors and probe must be checked and calibrated in accordance with 

manufacturer's instructions.

Comments: This equipment was not evaluated using manifold tank systems.

This equipment tests only the portion of the tank that contains product.

As the product level is lowered the leak rate in a leaking tank decreases (due to

lower head pressure).

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
50

Appearance on this list is 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: June 19, 1996

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 exceeds this threshold). 

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

Specification: System is installed on pressurized bulk material transfer piping. 

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.

System tested on 58,115 gallon pipeline.

Pipeline volume must not exceed 116,230 gallons.*

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.

Waiting Time: There is no waiting time between product delivery and testing.

There is no waiting time between last dispensing and testing.

Test Period: Data collection time is 2 to 5 minutes.

Test data is acquired and recorded by a computer.

Calculations are automatically performed by computer.

System Features: The system is permanently installed on the piping and automatically tests the pipeline at least 

once an hour under static conditions.

System also operates continuously during flowing conditions, but detection thresholds are 

higher due to hydraulic noise in the pipeline. 

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

fluctuates in a manner that is characteristic of a leak.

System has the ability to trigger a customized response such as audible and visual alarms 

and/or automatic pump shutdown upon detection of a leak.

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

system require normal annual inspection and calibration checks.

Comments: This system is 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 stations.

* The use of the pipeline test protocol allows methods to be used on pipelines twice the 

volume of the test pipeline. EFA should be contacted prior to this method’s use on pipelines 

that exceed 58,115 gallons up to 116,230 gallons.

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

116 20th St. Service Center

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

Tel: (916) 443-8842 Date of Evaluation: 09/26/95
51

Appearance on this list is 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: November 22, 1995

Egemin Naamloze Vennootschap

E'SPI III

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 exceeds this 

threshold). 

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

Capacity: The maximum tank capacity is 15,000 gallons. 

The tank must be between 50 and 95% full.

Waiting Time: Minimum waiting time between delivery to the tank and test data collection must be 7 

hours.

There must be no dispensing or product delivery during the test waiting time.

Test Period: Minimum data collection time must be 5.5 hours.

The test data must be acquired and recorded by a computer.

Leak rate is calculated from average of subsets of all collected data.

There must be no dispensing or product delivery during test.

Temperature: A single moving quartz crystal temperature sensor must be used to determine the 

average temperature for the stored hazardous substance.

Water Sensor: A water sensor must be used to detect water incursion.

Minimum water level detectable in the tank is 0.253 inches.

Minimum change in water level that can be detected is 0.029 inches.

Calibration: Temperature sensor and probe must be checked and calibrated in accordance with 

manufacturer's instructions.

Comments: This equipment was not evaluated using manifold tanks.

This equipment only tests the portion of the tank that contains product.

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

pressure).

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
52

Appearance on this list is 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: November 22, 1995

Egemin Naamloze Vennootschap

E'SPI IV

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 exceeds this 

threshold). 

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

Capacity: The maximum tank capacity is 15,000 gallons. 

The tank must be between 50 and 95% full.

Waiting Time: Minimum waiting time between product delivery to the tank and test data collection must 

be 6 hours.

There must be no dispensing or product delivery during the test waiting time.

Test Period: The minimum data collection time must be 2 hours and 15 minutes.

Test data must be acquired and recorded by a computer.

Leak rate is calculated from average of subsets of all collected data.

There must be no dispensing or product delivery during test.

Temperature: A minimum of 5 temperature sensors must be used to determine the average temperature 

of the stored hazardous substance. 

Water Sensor: A water sensor must be used to detect water incursion.

Minimum water level detectable in the tank is 0.253 inches.

Minimum change in water level that can be detected is 0.029 inches.

Calibration: Temperature sensor and probe must be checked and calibrated in accordance with 

manufacturer's instructions.

Comments: This equipment was not evaluated using manifold tanks.

This equipment only tests the portion of the tank that contains product.

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

pressure).

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
53

Appearance on this list is 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: November 22, 1995

Emco Electronics, Tuthill Corp.

EECO System LLD (Q0011) – Hourly Monitoring Test

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 exceeds this 

threshold). 

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

Specification: System is installed on pressurized fiberglass and steel piping.

The piping system volume must not exceed 67.4 gallons.

Tests are conducted at operating pressure. 

Waiting Time: No waiting time between last delivery and data collection.

No waiting time between dispensing and data collection.

Test Period: Data collection time for the test is at least 2 minutes.

Test data acquired and recorded by a microprocessor.

Calculations are automatically done with the microprocessor.

System Features: This system is permanently installed on the piping and automatically tests the line.

It uses a preset threshold and a single test to determine whether the piping is 

leaking.

If a leak is declared, the system shuts down the dispensing system, displays and 

prints a message, and triggers an alarm.

Calibration: Equipment 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
54

Appearance on this list is 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: November 22, 1995

Emco Electronics, Tuthill Corp.

EECO System LLD (Q0011) – Monthly Monitoring 

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 exceeds this 

threshold). 

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

Specification: System is installed on pressurized fiberglass and steel piping.

The piping system volume must not exceed 67.4 gallons.

Tests are conducted at operating pressure. 

Waiting Time: No waiting time between last delivery and data collection.

Waiting time after dispensing is 0 to 87 minutes.

Test Period: Data collection time for the test is at least 9 minutes.

Test data acquired and recorded by a microprocessor.

Calculations are automatically done with the microprocessor.

System Features: This system is permanently installed on the piping and automatically tests the line.

It uses a preset threshold and a single test to determine whether the piping is leaking.

If a leak is declared, the system shuts down the dispensing system, displays and prints a 

message, and triggers an alarm.

Calibration: Equipment 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
55

Appearance on this list is 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: November 22, 1995

Emco Electronics, Tuthill Corp.

EECO System LLD (Q0011) – Line Tightness Test

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 exceeds this 

threshold). 

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

Specification: System is installed on pressurized fiberglass and steel piping.

The piping system volume must not exceed 67.4 gallons.

Tests are conducted at operating pressure. 

Waiting Time: No waiting time between last delivery and data collection.

Waiting time after dispensing is 0 to 2.8 hours.

Test Period: Data collection time for the test is at least 31 minutes.

Test data acquired and recorded by a microprocessor.

Calculations are automatically done with the microprocessor.

System Features: This system is permanently installed on the piping and automatically tests the line.

It uses a preset threshold and a single test to determine whether the piping is leaking.

If a leak is declared, the system shuts down the dispensing system, displays and prints a 

message, and triggers an alarm.

Calibration: Equipment 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
56

Appearance on this list is 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: November 22, 1995

Emco Electronics, Tuthill Corp.

EECO System LLD Flexible Pipelines – Hourly Monitoring Test

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 exceeds this 

threshold). 

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

Specification: System is installed on flexible pipelines.

The flexible pipeline system volume must not exceed 49.6 gallons.

Tests are conducted at operating pressure. 

Waiting Time: No waiting time between last delivery and data collection.

No waiting time between dispensing and data collection.

Test Period: Data collection time for the test is at least 11.4 minutes.

Test data acquired and recorded by a microprocessor.

Calculations are automatically done with the microprocessor.

System Features: This system is permanently installed on the piping and automatically tests the line.

It uses a preset threshold and a single test to determine whether the piping is 

leaking.

If a leak is declared, the system shuts down the dispensing system, displays and 

prints a message, and triggers an alarm.

Calibration: Equipment 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
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: November 22, 1995

Emco Electronics, Tuthill Corp.

EECO System LLD Flexible Pipelines – Line Tightness Test

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 exceeds this 

threshold). 

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

Specification: System may be installed on flexible pipelines.

The flexible pipeline system volume must not exceed 49,6 gallons.

Tests are conducted at an average pressure of 10 psi. 

Waiting Time: No waiting time between last delivery and data collection.

Waiting time between last dispensing and data collection must be at least 14 minutes.

Test Period: Data collection time for the test is at least 9 hours.

Test data acquired and recorded by a microprocessor.

Calculations are automatically done with the microprocessor.

System Features: This system is permanently installed on the piping and automatically tests the line.

It uses a preset threshold and a single test to determine whether the piping is leaking.

If a leak is declared, the system shuts down the dispensing system, displays and prints a 

message, and triggers an alarm.

Calibration: Equipment 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
58

Appearance on this list is 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: November 22, 1995

Emco Electronics, Tuthill Corp.

EECO System TLM

(0.2 gph Precision Test)

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 exceeds this

threshold). 

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

substances determined to be compatible with probe. 

Capacity: The maximum tank capacity is 15,000 gallons.

The tank must be between 50 and 95% full.

Waiting Time: Minimum waiting time between delivery to the tank and the test data collection must be 6 

hours.

There must be no dispensing or product delivery during the test waiting time.

Test Period: The minimum data collection time must be 1.9 hours.

Test data is acquired and recorded by the 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 product delivery during the test.

Temperature: A minimum of 5 Resistance Temperature Detectors must be used to determine the average 

temperature of the stored hazardous substance. 

Water Sensor: A water sensor must be used to detect water incursion.

Minimum water level detectable in the tank is 0.66 inches.

Minimum detectable change in water level is 0.039 inches.

Calibration: Temperature sensors and probe must be checked and calibrated in accordance with 

manufacturer's instructions.

Comments: This equipment was not evaluated using manifolded tanks.

This equipment tests only the portion of the tank that contains product.

As the product level is lowered the leak rate in a leaking tank decreases (due to 

lower head pressure).

A magnetostrictive probe measures changes in product volume.

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
59

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the method or equipment.

Revision Date: November 22, 1995

Emco Electronics, Tuthill Corp.

EECO System TLM

(0.1 gph Precision Test)

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 exceeds this 

threshold). 

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

determined to be compatible with probe. 

Capacity: The maximum tank capacity is 15,000 gallons.

The tank must be between 50 and 95% full.

Waiting Time: Minimum waiting time between delivery to the tank and the test data collection must be 6 

hours.

There must be no product delivery during the test waiting time.

There is no minimum waiting time after dispensing.

Test Period: Minimum data collection time must be 3.75 hours.

During the evaluation, test duration averaged 3.75 hours at 95% full and 5.97 hours at 50% 

full.

Test data is 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 product delivery during the test.

Temperature: A minimum of 5 Resistance Temperature Detectors must be used to determine the average 

temperature of the stored substance. 

Water Sensor: A water sensor must be used to detect water incursion.

Minimum water level detectable in the tank is 0.66 inches.

Minimum detectable change in water level is 0.039 inches.

Calibration: Temperature sensors and probe must be checked regularly and calibrated in accordance 

with manufacturer's instructions.

Comments: This equipment was not evaluated using manifolded tanks.

This equipment tests only the portion of the tank that contains product.

As the product level is lowered the leak rate in a leaking tank decreases (due to 

lower head pressure).

A magnetostrictive probe is used to measure changes in product volume.

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
60

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the method or equipment.

Revision Date: November 22, 1995

Emco Electronics, Tuthill Corp.

EECO System TLM

(0.2 gph Quick Test)

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 exceeds this 

threshold). 

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

substances determined to be compatible with probe. 

Capacity: The maximum tank capacity is 15,000 gallons.

The tank must be between 50 and 95% full.

Waiting Time: Minimum waiting time between delivery to the tank and test data collection must be at 

least 1 hour and can range up to 6 hours depending upon tank conditions.

There must be no dispensing or product delivery during the test waiting time.

Test Period: Minimum data collection time must be 53 minutes.

Test data is acquired and recorded by the 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 product delivery during the test.

Temperature: A minimum of 5 Resistance Temperature Detectors must be used to determine the average 

temperature of the stored hazardous substance. 

Water Sensor: A water sensor must be used to detect water incursion.

Minimum water level detectable in the tank is 0.66 inches.

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

Calibration: Temperature sensors and probe must be checked and calibrated in accordance with 

manufacturer's instructions.

Comments: This equipment was not evaluated using manifolded tanks.

This equipment tests only the portion of the tank that contains product.

As the product level is lowered the leak rate in a leaking tank decreases (due to 

lower head pressure).

A magnetostrictive probe measures changes in product volume.

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
61

Appearance on this list is 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: November 22, 1995

Emco Electronics, Tuthill Corp.

EECO System TLM

(0.1 gph Quick Test)

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 exceeds this 

threshold). 

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

determined to be compatible with probe. 

Capacity: The maximum tank capacity is 15,000 gallons.

The tank must be between 50 and 95% full.

Waiting Time: Minimum waiting time between delivery to the tank and the test data collection must be 6 

hours.

There must be no product delivery during the test waiting time.

There is no minimum waiting time after dispensing.

Test Period: The minimum data collection time is 1 hour and 44 minutes.

During the evaluation, test duration averaged 2.76 hours at 50% full and 1.73 hours at 95% 

full.

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

There must be no dispensing or product delivery during the test.

Temperature: A minimum of 5 Resistance Temperature Detectors must be used to determine the average 

temperature of the stored substance. 

Water Sensor: A water sensor must be used to detect water incursion.

Minimum water level detectable in the tank is 0.66 inches.

Minimum detectable change in water level is 0.039 inches.

Calibration: Temperature sensors and probe must be checked regularly and calibrated in accordance 

with manufacturer's instructions.

Comments: This equipment was not evaluated using manifolded tanks.

This equipment tests only the portion of the tank that contains product.

As the product level is lowered the leak rate in a leaking tank decreases (due to 

lower head pressure).

A magnetostrictive probe is used to measure changes in product volume.

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
62

Appearance on this list is 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: November 22, 1995

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.

commercial 

gasoline

synthetic 

gasoline

commercial 

gasoline

synthetic 

gasoline

commercial 

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

Comments:

EPA and many states require detection of 1/8 inch of product, which is 0.32 cm, for groundwater 

monitoring. 

The test procedures used were modified 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. 

Detectors are reusable. 

Systems alarm if either water or product leaks into the 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
63

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the method or equipment.

Revision Date: November 22, 1995

Engineered Systems, Inc.

Image II

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 exceeds this 

threshold). 

Applicability: Gasoline, diesel, aviation fuel and solvents. 

Capacity: The maximum tank capacity is 15,000 gallons.

The tank must be 90% full.

Waiting Time: Minimum waiting time between product delivery to the tank and test data collection must 

be 8 hours.

There must be no dispensing or product delivery during the test waiting time.

Test Period: The minimum data collection time must be 6 hours.

Test data must be acquired and recorded by a computer.

Leak rate is calculated from average of subsets of all collected data.

There must be no dispensing or product delivery during the test.

Temperature: Minimum of 5 Resistance Temperature Detectors must be used to determine the average 

temperature of the stored hazardous product. 

Water Sensor: A water sensor must be used to detect water incursion.

Minimum water level detectable in the tank is 0.83 inches.

Minimum detectable change in water level is 0.0116 inches.

Calibration: Temperature sensors and probe must be checked regularly and calibrated in accordance 

with manufacturer's instructions.

Comments: This equipment was not evaluated using manifolded tanks.

This equipment only tests the portion of the tank that contains product.

As the product level is lowered the leak rate in a leaking tank decreases (due to 

lower head pressure).

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
64

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the method or equipment.

Revision Date: November 22, 1995

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 exceeds this threshold).

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

Capacity: Maximum tank capacity is 15,000 gallons.

Data Requirement: Minimum of 64 days of product level and flow through data.

Comments: Of 120 data sets submitted for analysis, 13 were not evaluated and 16 were 

inconclusive.

The median monthly throughput for tanks used in this evaluation was 42,835 gallons 

per month.

This evaluation did not include data from manifold tanks.

Data sets used in this evaluation were supplied by the 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
65

Appearance on this list is 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: November 22, 1995

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 exceeds this threshold).

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

Capacity: Maximum single tank capacity is 21,000 gallons. Maximum total capacity for tanks in a 

manifolded system shall not exceed 60,000 gallons.

Data Requirement: Minimum of 30 days of product level and flow through data.

Comments: 32% of the data sets used in this evaluation were from manifold tanks. 89% of the 

manifolded tanks had manually stuck data.

A maximum of three tanks were included in the manifolded systems used in this

evaluation. The largest single tank capacity was 20,000 gallons. 

Of 56 data sets presented for evaluation, 6 were not analyzed due to unusable data.

There were no inconclusives.

The median monthly throughput of tanks used in this evaluation was 52,207 gallons.

Leak rates ranging from 0.0497 to 0.203 gph were used in evaluation.

Data sets used in the evaluation were supplied by the 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
66

Appearance on this list is 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: November 22, 1995

Environment and Safety

EASI Level-Tru

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 exceeds this 

threshold). 

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

solvents. 

Capacity: The maximum tank capacity is 15,000 gallons.

The tank must be between 50 and 95% full.

Waiting Time: Minimum waiting time between product delivery to the tank and test data collection must 

be 4.1 hours.

There must be no dispensing or product delivery during the test waiting time.

Test Period: The minimum data collection time must be 3.6 hours.

Test data must be acquired and recorded by a computer.

Leak rate is calculated from data collected over the entire range of the test period.

There must be no dispensing or product delivery during the test.

Temperature: A minimum of 5 resistance temperature detectors must be used to determine the average 

temperature of the stored substance. 

Water Sensor: A water sensor must be used to detect water incursion.

Minimum water level detectable in the tank is 0.896 inches.

Minimum detectable change in water level is 0.023 inches.

Calibration: Temperature sensors and probe must be checked regularly and calibrated in accordance 

with manufacturer's instructions.

Comments: This equipment was not evaluated using manifolded tanks.

This equipment only tests the portion of the tank that contains product.

As the product level is lowered the leak rate in a leaking tank decreases (due to 

lower head pressure).

System is currently undergoing 3rd party certification for 0.1 gph leak rate.

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
67

Appearance on this list is 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: November 22, 1995

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
68

Appearance on this list is 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: November 22, 1995

Environmental Management Technologies

SIRTECH

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 exceeds this threshold).

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

Capacity: Maximum tank capacity is 18,000 gallons.

Data Requirement: Vendor requires 90 days of product level and flow through data before making the first 

evaluation. Following the first evaluation, subsequent evaluations are made based on 

30 days of data.

Comments: Of the 41 data sets presented for evaluation, 5 were inconclusive.

The median monthly throughput for tanks used in this evaluation was 14,600 gallons. 

Leak rates of 0.05, 0.1, and 0.2gph were used in this evaluation.

Data sets used in this evaluation were supplied by the vendor.

This evaluation did not include data from manfolded tanks.

Environmental Management Technologies Evaluator: Nathan Adams, Middle TN State Univ.

P.P. Box 2791 Tel: (615) 898-2644

Murfressboro, TN 37133

Tel: (615) 895-2872 Date of Evaluation: 11/05/92
69

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the method or equipment.

Revision Date: November 22, 1995

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:

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

Comments:

EPA and many states require detection of 1/8 inch of product, which is 0.32 cm. 

The 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
70

Appearance on this list is 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: November 22, 1995

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:

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

Comments:

EPA and many states require detection of 1/8 inch of product, which is 0.32 cm. 

The 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
71

Appearance on this list is 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: November 22, 1995

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

* Relative accuracy is a function of systematic error, or bias, and random error, or precision. Smaller values

 indicate better accuracy.

** See glossary.

Lower detection limit for other fuels (ppm):

diesel JP-4 JP-8 synthetic gasoline 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:

The test procedures used were taken form 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

Tel: (800) 510-3627 Date of Evaluation: 03/07/94 and 12/05/94
72

Appearance on this list is 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: November 22, 1995

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

* Relative accuracy is a function of systematic error, or bias, and random error, or precision. Smaller values

 indicate better accuracy.

** 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:

The test procedures used were taken 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. 

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: 03/07/94
73

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the method or equipment.

Revision Date: November 22, 1995

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 from EPA's "Standard Test Procedures for Evaluating Leak Detection 

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

Detection and fall times were not measured. 

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 Fuel Detection and Remediation, Inc.

FDR Services, Inc. Evaluator: David G. Bray, Ph.D.

4230 LBJ Freeway, Suite 215 University of Missouri - Columbia

Dallas, TX 75244 Tel: (573) 882-2439

Tel: (214)506-0588 Date of Evaluation: 07/27/94
74

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the method or equipment.

Revision Date: November 22, 1995

FE Petro, Inc.

STP-MLD-E Line (Flexline) 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 exceeds this 

threshold). 

Applicability: Gasoline, diesel, aviation fuel, and some solvents.

Specification: System is installed on flexible line.

The piping system volume must not exceed 49.6 gallons.

Tests are conducted at the line operating pressure.

Waiting Time: No waiting time between last delivery of the product to the tank and the start of data 

collection. 

No waiting time between last dispensing of product through the pipeline and the start of 

data collection for the test.

Test Period: Average data collection time is 3 minutes.

System Features: This system is permanently installed on the piping and automatically tests the line.

It uses a preset threshold and a single test to determine whether the piping is leaking.

If a leak is detected, this system restricts fuel flow to dispenser.

Calibration: Equipment 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 the third-party evaluation

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
75

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the method or equipment.

Revision Date: November 22, 1995

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 exceeds this 

threshold). 

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

Specification: System can test fiberglass and steel pipelines.

The piping system volume must not exceed 129.14 gallons.

Tests are conducted at the line operating pressure.

Waiting Time: No waiting time between last delivery of the product to the tank and the start of data 

collection. 

No waiting time between last dispensing of product through the pipeline and the start of 

data collection for the test.

Test Period: Data collection time for the test is less than 30 seconds.

System Features: This system is permanently installed on the piping and automatically tests the line.

It uses a preset threshold and a single test to determine whether the piping is leaking.

If a leak is detected, this system restricts fuel flow to dispenser.

Calibration: Equipment 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
76

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

the method or equipment.

Revision Date: November 22, 1995

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 exceeds this 

threshold). 

Applicability: Diesel

Specification: System is installed on steel and fiberglass (rigid) pipelines.

The piping system (rigid) volume must not exceed 341 gallons.

Tests are conducted at the line operating pressure.

Waiting Time: No waiting time between last delivery of the product to the tank and the start of data 

collection. 

No waiting time between last dispensing of product through the pipeline and the start of 

data collection for the test.

Test Period: Average data collection time is 1 minute.

System Features: This system is permanently installed on the piping and automatically tests the line.

It uses a preset threshold and a single test to determine whether the piping is leaking.

If a leak is detected, this system restricts fuel flow to dispenser.

Calibration: Equipment 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
77

Appearance on this list is 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: November 22, 1995

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 exceeds this threshold). 

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

Capacity: The maximum tank capacity is 30,000 gallons.

The tank may be tested from zero to 100% full.

The maximum tank diameter must be 10 feet.

Waiting Time: Minimum waiting time between product delivery and test data collection must be 24 

hours.

Minimum waiting time between "topping off" the annular space with liquid and test data 

collection must be 3 hours.

There must be no product delivery during the waiting time.

Test Period: The minimum data collection time must be at least 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 without changes in the water table.

Other Limitations: Volume of trapped vapor must not exceed 20 gallons. 

The change in barometric pressure must be less than 0.04 psia over the 4-hour test 

period. 

The annular space is at least 100% full with either wat er or antifreeze. 

If the groundwater is above the bottom of the tank, and no product is being dispensed 

during test, the total change in groundwater elevation during test must be less than 1.5 

inches per hour. 

If the groundwater is below the bottom of the tank or not changing during a test, the total 

change in product level during a 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
78

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

the method or equipment.

Revision Date: November 22, 1995

Gasboy International

Gasboy TMS 500

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 exceeds this 

threshold). 

Applicability: Gasoline, diesel, aviation fuel, and solvents

Capacity: The maximum tank capacity is 15,000 gallons.

The tank must be between 50 and 95% full.

Waiting Time: Minimum waiting time between product delivery to the tank and test data collection must 

be 6 hours.

There must be no dispensing or product delivery during the test waiting time.

Test Period: The minimum data collection time must be 3 hours.

Test data must be 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 product delivery during the test.

Temperature: A minimum of five resistance temperature detectors must be used to determine the 

average temperature of the stored substance. 

Water Sensor: A water sensor must be used to detect water incursion.

Minimum water level detectable in the tank is 1.04 inches.

Minimum detectable change in water level is 0.011 inches.

Calibration: Temperature sensors and probes must be checked and calibrated in accordance with 

manufacturer's instructions.

Comments: This equipment was not evaluated using manifolded tanks.

This equipment only tests that portion of the tank that contains product.

As the product level is lowered the leak rate in a leaking tank decreases (due to 

lower head pressure).

This system is no longer being manufactured although product support is still available. 

Gasboy International was formerly called William M. Wilson’s Sons.

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
79

Appearance on this list is 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: November 22, 1995

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: 1.88 gph (a leak is declared if the output of the measurement system exceeds this 

threshold). 

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

Specification: System is installed on pressurized fiberglass and steel piping.

The piping system volume must not exceed 89 gallons.

Tests are conducted at the line operating pressure. 

Waiting Time: There is no waiting time between delivery of the product to the tank and the start of 

data collection.

Minimum waiting period between last dispensing and testing is 16 minutes.

Test Period: The minimum data collection time is 28.8 seconds.

Test data must be acquired and recorded by a microprocessor.

Calculations are automatically done by the microprocessor.

System Features: This system is permanently installed on the piping and automatically tests the line.

It uses a preset threshold and a single test to determine whether the piping is 

leaking.

If a leak is declared, this system displays a message, triggers an alarm, and shuts 

down the dispensing system.

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

manufacturer’s instructions.

Comments: Please note that the following 2 specification sheets are separate evaluations for this 

same system at the same leak rate.

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: 08/07/91
80

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

the method or equipment.

 Revision Date: November 22, 1995

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: 2.4 gph (a leak is declared if the output of the measurement system exceeds this 

threshold). 

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

Specification: System is installed on pressurized fiberglass and steel piping.

The piping system volume must not exceed 41 gallons.

Tests are conducted at the line operating pressure. 

Waiting Time: There is no waiting time between delivery of the product to the tank and the start of 

data collection.

Minimum waiting period between last dispensing and testing depends on volume of 

product and temperature gradient which is determined by the system’s computer.

Test Period: The minimum data collection time is 13.9 seconds.

Test data must be acquired and recorded by a microprocessor.

Calculations are automatically done by the microprocessor.

System Features: This system is permanently installed on the piping and automatically tests the line.

It uses a preset threshold and a single test to determine whether the piping is 

leaking.

If a leak is declared, this system displays a message, triggers an alarm, and shuts 

down the dispensing system.

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

manufacturer’s instructions.

Comments: Please note that the previous and following specification sheets are separate 

evaluations for this same system at the same leak rate.

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: 09/20/91
81

Appearance on this list is 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: November 22, 1995

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 exceeds this 

threshold). 

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

Specification: System is installed on pressurized fiberglass and steel piping.

The piping system volume must not exceed 128 gallons.

Tests are conducted at the line operating pressure. 

Waiting Time: There is no waiting time between delivery of the product to the tank and the start of 

data collection.

Minimum waiting period between last dispensing and testing depends on volume of 

product and temperature gradient which is determined by the system’s computer.

Test Period: The minimum data collection time is 14 seconds.

Test data must be acquired and recorded by a microprocessor.

Calculations are automatically done by the microprocessor.

System Features: This system is permanently installed on the piping and automatically tests the line.

It uses a preset threshold and a single test to determine whether the piping is 

leaking.

If a leak is declared, this system displays a message, triggers an alarm, and shuts 

down the dispensing system.

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

manufacturer’s instructions.

Comments: Please note that the 2 previous specification sheets are separate evaluations for this 

same system at the same leak rate.

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: 04/12/93
82

Appearance on this list is 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: November 22, 1995

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 exceeds this 

threshold). 

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

Specification: System is installed on pressurized fiberglass and steel piping.

The piping system volume must not exceed 41 gallons.

Tests are conducted at the line operating pressure. 

Waiting Time: There is no waiting time between delivery of the product to the tank and the start of 

data collection.

Minimum waiting period between last dispensing and testing depends on volume of 

product and temperature gradient which is determined by the system’s computer.

Test Period: The minimum data collection time (response time) for the test must be 0.75 to 8.85 

hours.

Test data must be acquired and recorded by a microprocessor.

Calculations are automatically done by the microprocessor.

System Features: This system is permanently installed on the piping and automatically tests the line.

It uses a preset threshold and a single test to determine whether the piping is 

leaking.

If a leak is declared, this system displays a message, triggers an alarm, and shuts 

down the dispensing system.

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

manufacturer’s instructions.

Comments: Please note that the following specification sheet is a separate evaluation for this 

same system at the same leak rate.

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: 09/20/91
83

Appearance on this list is 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: November 22, 1995

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 exceeds this 

threshold). 

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

Specification: System is installed on pressurized fiberglass and steel piping.

The piping system volume must not exceed 128 gallons.

Tests are conducted at the line operating pressure. 

Waiting Time: There is no waiting time between delivery of the product to the tank and the start of 

data collection.

Minimum waiting period between last dispensing and testing depends on volume of 

product and temperature gradient which is determined by the system’s computer.

Test Period: The minimum data collection time is 6 minutes.

Test data must be acquired and recorded by a microprocessor.

Calculations are automatically done by the microprocessor.

System Features: This system is permanently installed on the piping and automatically tests the line.

It uses a preset threshold and a single test to determine whether the piping is 

leaking.

If a leak is declared, this system displays a message, triggers an alarm, and shuts 

down the dispensing system.

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

manufacturer’s instructions.

Comments: Please note that the previous specification sheet is a separate evaluation for this 

same system at the same leak rate.

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: 04/12/93
84

Appearance on this list is 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: November 22, 1995

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% and PFA=0%. 

Leak Threshold: 0.05 gph (a leak is declared if the output of the measurement system exceeds this 

threshold). 

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

Specification: System is installed on pressurized fiberglass and steel piping.

The piping system volume must not exceed 89 gallons.

Tests are conducted at the line operating pressure. 

Waiting Time: There is no waiting time between delivery of the product to the tank and the start of 

data collection.

Minimum waiting period between last dispensing and testing is 2.5 hours.

Test Period: The minimum data collection time is 0.3 hours.

Test data must be acquired and recorded by a microprocessor.

Calculations are automatically done by the microprocessor.

System Features: This system is permanently installed on the piping and automatically tests the line.

It uses a preset threshold and a single test to determine whether the piping is 

leaking.

If a leak is declared, this system displays a message, triggers an alarm, and shuts 

down the dispensing system.

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

manufacturer’s instructions.

Comments: Please note that the following 2 specification sheets are separate evaluations for this 

same system at the same leak rate.

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: 08/07/91
85

Appearance on this list is 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: November 22, 1995

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% and PFA=0%. 

Leak Threshold: 0.04 gph (a leak is declared if the output of the measurement system exceeds this 

threshold). 

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

Specification: System is installed on pressurized fiberglass and steel piping.

The piping system volume must not exceed 41 gallons.

Tests are conducted at the line operating pressure. 

Waiting Time: There is no waiting time between product delivery and testing.

Minimum waiting period between last dispensing and testing depends on volume of 

product and temperature gradient which is determined by the system’s computer.

Test Period: The minimum data collection time is 13.87 minutes.

Test data must be acquired and recorded by a microprocessor.

Calculations are automatically done by the microprocessor.

System Features: This system is permanently installed on the piping and automatically tests the line.

It uses a preset threshold and a single test to determine whether the piping is 

leaking.

If a leak is declared, this system displays a message, triggers an alarm, and shuts 

down the dispensing system.

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

manufacturer’s instructions.

Comments: Please note that the previous and following specification sheets are separate 

evaluations for this same system at the same leak rate.

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: 09/20/91
86

Appearance on this list is 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: November 22, 1995

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% and PFA=0%. 

Leak Threshold: 0.079 gph (a leak is declared if the output of the measurement system exceeds this 

threshold). 

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

Specification: System is installed on pressurized fiberglass and steel piping.

The piping system volume must not exceed 128 gallons.

Tests are conducted at the line operating pressure. 

Waiting Time: There is no waiting time between product delivery and testing.

Minimum waiting period between last dispensing and testing depends on volume of 

product and temperature gradient which is determined by the system’s computer.

Test Period: The minimum data collection time is 14 minutes.

Test data must be acquired and recorded by a microprocessor.

Calculations are automatically done by the microprocessor.

System Features: This system is permanently installed on the piping and automatically tests the line.

It uses a preset threshold and a single test to determine whether the piping is 

leaking.

If a leak is declared, this system displays a message, triggers an alarm, and shuts 

down the dispensing system.

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

manufacturer’s instructions.

Comments: Please note that the 2 previous specification sheets are separate evaluations for this 

same system at the same leak rate.

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: 04/12/93
87

Appearance on this list is 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: November 22, 1995

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 exceeds this 

threshold). 

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

Specification: System is installed on pressurized flexible piping.

The piping system volume must not exceed 158.4 gallons.

Tests are conducted at the line operating pressure.

The mechanical line leak detector must be removed from the pipeline. 

Waiting Time: There is no waiting time between delivery of the product to the tank and the start of 

data collection.

Minimum waiting period between last dispensing and testing depends on volume of 

product and temperature gradient which is determined by the system’s computer.

Test Period: The minimum data collection time is 1 minute.

Test data must be acquired and recorded by a microprocessor.

Calculations are automatically done by the microprocessor.

System Features: This system is permanently installed on the piping and automatically tests the line.

It uses a preset threshold and a single test to determine whether the piping is 

leaking.

If a leak is declared, this system displays a message, triggers an alarm, and shuts 

down the dispensing system.

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

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
88

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

the method or equipment.

Revision Date: November 22, 1995

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 exceeds this 

threshold). 

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

Specification: System is installed on pressurized flexible piping.

The piping system volume must not exceed 158.4 gallons.

Tests are conducted at the line operating pressure.

The mechanical line leak detector must be removed from the pipeline. 

Waiting Time: There is no waiting time between delivery of the product to the tank and the start of 

data collection.

Minimum waiting period between last dispensing and testing depends on volume of 

product and temperature gradient which is determined by the system’s computer.

Test Period: The minimum data collection time (response time) for the test must be 0.75 to 8.85 

hours.

Test data must be acquired and recorded by a microprocessor.

Calculations are automatically done by the microprocessor.

System Features: This system is permanently installed on the piping and automatically tests the line.

It uses a preset threshold and a single test to determine whether the piping is 

leaking.

If a leak is declared, this system displays a message, triggers an alarm, and shuts 

down the dispensing system.

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

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
89

Appearance on this list is 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: November 22, 1995

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 exceeds this 

threshold). 

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

Specification: System is installed on pressurized flexible piping.

The piping system volume must not exceed 158.4 gallons.

Tests are conducted at the line operating pressure.

The mechanical line leak detector must be removed from the pipeline. 

Waiting Time: There is no waiting time between product delivery and testing.

Minimum waiting period between last dispensing and testing depends on volume of 

product and temperature gradient which is determined by the system’s computer.

Test Period: The minimum data collection time must be 1.2 to 12.9 hours.

Test data must be acquired and recorded by a microprocessor.

Calculations are automatically done by the microprocessor.

System Features: This system is permanently installed on the piping and automatically tests the line.

It uses a preset threshold and a single test to determine whether the piping is 

leaking.

If a leak is declared, this system displays a message, triggers an alarm, and shuts 

down the dispensing system.

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

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
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: November 22, 1995

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 exceeds this 

threshold). 

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

Capacity: The maximum tank capacity is 15,000 gallons.

The tank must be between 50 and 95% full.

Waiting Time: Minimum waiting time between delivery to the tank and test data collection must be 8.3 

hours.

There must be no dispensing or product delivery during the test waiting time.

Test Period: The minimum data collection time must be 5 hours.

Test data must be acquired and recorded by a microprocessor within the monitoring 

console.

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

There must be no dispensing or product delivery during the test.

Temperature: A temperature averaging probe (thermistor) must be used to determine the average 

temperature of the stored hazardous substance. 

Water Sensor: A water sensor must be used to detect water incursion.

Minimum water level detectable in the tank is 1.40 inches.

Minimum detectable water level change is 0.040 inches.

Calibration: The in-tank probe with temperature and water sensor is self-calibrating but occasional 

system checks may be required in accordance with manufacturer's instructions.

Comments: This equipment was not evaluated using manifolded tanks.

This equipment only tests that portion of the tank that contains product.

As the product level is lowered the leak rate in a leaking tank decreases (due to 

lower head pressure).

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
91

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

the method or equipment.

Revision Date: November 22, 1995

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 exceeds this 

threshold). 

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

Capacity: The maximum tank capacity is 15,000 gallons.

The tank must be between 50 and 95% full.

Waiting Time: Minimum waiting time between delivery to the tank and test data collection must be 8.3 

hours.

There must be no dispensing or product delivery during the test waiting time.

Test Period: The minimum data collection time must be 2 hours.

Test data must be acquired and recorded by a microprocessor within the monitoring 

console.

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

There must be no dispensing or product delivery during the test.

Temperature: A minimum of 5 thermistors must be used to determine the average temperature of the 

stored hazardous substance. 

Water Sensor: A water sensor must be used to detect water incursion.

Minimum water level detectable in the tank is 1.52 inches.

Minimum change in water level that can be detected is 0.027 inches.

Calibration: The in-tank probe with temperature and water sensor is self-calibrating but occasional 

system checks may be required in accordance with manufacturer's instructions.

Comments: This equipment was not evaluated using manifolded tanks.

This equipment only tests that portion of the tank that contains product.

As the product level is lowered the leak rate in a leaking tank decreases (due to 

lower head pressure).

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
92

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

the method or equipment.

Revision Date: November 22, 1995

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 exceeds this 

threshold). 

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

Capacity: The maximum tank capacity is 15,000 gallons.

The tank must at least 95% full.

Waiting Time: Minimum waiting time between delivery to the tank and test data collection must be 8.25 

hours.

There must be no dispensing or product delivery during the test waiting time.

Test Period: The minimum data collection time must be 3 hours.

Test data must be acquired and recorded by a microprocessor within the monitoring 

console.

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

There must be no dispensing or product delivery during the test.

Temperature: A minimum of 5 thermistors must be used to determine the average temperature of the 

stored hazardous substance. 

Water Sensor: A water sensor must be used to detect water incursion.

Minimum water level detectable in the tank is 1.52 inches.

Minimum detectable water level change is 0.027 inches.

Calibration: The in-tank probe with temperature and water sensor is self-calibrating but occasional 

system checks may be required in accordance with manufacturer's instructions.

Comments: This equipment was not evaluated using manifolded tanks.

This equipment only tests that portion of the tank that contains product.

As the product level is lowered the leak rate in a leaking tank decreases (due to 

lower head pressure).

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
93

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the method or equipment.

Revision Date: November 22, 1995

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 exceeds this 

threshold). 

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

Capacity: The maximum tank capacity is 15,000 gallons.

The tank must be between 50 and 95% full.

Waiting Time: Minimum waiting time between delivery to the tank and test data collection must be 8.3 

hours.

There must be no dispensing or product delivery during the test waiting time.

Test Period: The minimum data collection time must be 2 hours.

Test data must be acquired and recorded by a microprocessor within the monitoring 

console.

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

There must be no dispensing or product delivery during the test.

Temperature: A minimum of 5 thermistors are used to determine the average temperature of the stored 

hazardous substance. 

Water Sensor: A water sensor must be used to detect water incursion.

Minimum water level detectable in the tank is 0.544 inches.

Minimum change in water level that can be detected is 0.027 inches.

Calibration: The in-tank probe with temperature and water sensor is self-calibrating but occasional 

system checks may be required in accordance with manufacturer's instructions.

Comments: This equipment was not evaluated using manifolded tanks.

This equipment only tests that portion of the tank that contains product.

As the product level is lowered the leak rate in a leaking tank decreases (due to 

lower head pressure).

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
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: November 22, 1995

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: 0.069 gph (a leak is declared if the output of the measurement system exceeds this 

threshold). 

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

Capacity: The maximum tank capacity is 15,000 gallons.

The tank must be at least 95% full.

Waiting Time: Minimum waiting time between product delivery to the tank and test data collection must 

be 8.25 hours.

There must be no dispensing or product delivery during the test waiting time.

Test Period: The minimum data collection time must be 3 hours.

Test data must be acquired and recorded by a microprocessor within the monitoring 

console.

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

There must be no dispensing or product delivery during the test.

Temperature: A minimum of 5 thermistors are used to determine the average temperature of the stored 

substance. 

Water Sensor: A water sensor must be used to detect water incursion.

Minimum water level detectable in the tank is 0.544 inches.

Minimum change in water level that can be detected is 0.027 inches.

Calibration: The in-tank probe with temperature and water sensor is self-calibrating but occasional 

system checks may be required in accordance with manufacturer's instructions.

Comments: This equipment was not evaluated using manifolded tanks.

This equipment only tests that portion of the tank that contains product.

As the product level is lowered the leak rate in a leaking tank decreases (due to 

lower head pressure).

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
95

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

the method or equipment.

Revision Date: November 22, 1995

Gilbarco Environmental Products

PA02590XXX000

LIQUID-PHASE INTERSTITIAL DETECTOR

Detector:

Output type: qualitative

Sampling frequency: continuous

Operating principle: float switch

Test Results: *

commercial commercial

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, home heating oil #2, water.

Comments:

EPA and many states require detection of 1/8 inch of product, which is 0.32 cm, for groundwater monitoring. 

The test procedures used were those in 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.

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
96

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

the method or equipment.

Revision Date: November 22, 1995

Gilbarco Environmental Products

PA02591144000

LIQUID-PHASE INTERSTITIAL DETECTOR

Detector:

Output type: qualitative

Sampling frequency: continuous

Operating principle: float switch

Test Results:

commercial commercial

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, home heating oil #2, water.

Comments:

EPA and many states require detection of 1/8 inch of product, which is 0.32 cm, for groundwater monitoring. 

The test procedures used were those in 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.

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
97

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

the method or equipment.

Revision Date: November 22, 1995

Gilbarco Environmental Products

PA02592000000

LIQUID-PHASE INTERSTITIAL DETECTOR

Detector:

Output type: qualitative

Sampling frequency: continuous

Operating principle: float switch

Test Results:

commercial commercial

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, home heating oil #2, water.

Comments:

EPA and many states require detection of 1/8 inch of product, which is 0.32 cm, for groundwater monitoring. 

The test procedures used were those in 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.

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
98

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

the method or equipment.

Revision Date: November 22, 1995

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:

commercial 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: commercial gasoline, n-hexane, diesel fuel, jet-A fuel, toluene, synthetic gasoline, 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 of product, which is 0.32 cm. 

This 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
99

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the method or equipment.

Revision Date: November 22, 1995

Gilbarco Environmental Products

PA02660000000

VAPOR-PHASE OUT-OF-TANK PRODUCT DETECTOR

Detector:

Output type: qualitative

Sampling frequency: continuous

Operating principle: adsistor

Test Results:

commercial synthetic

gasoline gasoline JP-4

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: commercial gasoline, JP-4 jet fuel.

No Response: n-hexane, synthetic gasoline, toluene, xylene(s).

Comments:

The test procedures used were those in 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
100

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the method or equipment.

Revision Date: November 22, 1995

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 exceeds this 

threshold). 

Applicability: Gasoline, diesel, and aviation fuel.

Specification: System can be installed on pressurized fiberglass, steel, and flexible pipelines.

The rigid piping system volume must not exceed 341 gallons.

The flexible piping system volume must not exceed 49.6 gallons.

Tests are conducted at the line operating pressure.

Waiting Time: There is no waiting period between product delivery and testing.

There is no waiting period between last dispensing and testing.

Test Period: Minimum data collection time (response time) is 1 minute.

This is a single test consisting of multiple cycles of data acquisition with 1-24 

minutes waiting time between each cycle.

Test data must be acquired and recorded by a permanently installed microprocessor.

Calculations are automatically done by the microprocessor.

System Features: This system is permanently installed on the pipeline and automatically tests the line.

It uses a preset threshold and a single test to determine whether the pipeline is 

leaking.

If a leak is declared, this system displays a message, triggers an alarm, and shuts 

down the dispensing system.

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

the 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
101

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the method or equipment.

Revision Date: November 22, 1995

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 exceeds this 

threshold). 

Applicability: Gasoline, diesel, and aviation fuel.

Specification: System is installed on pressurized fiberglass, steel, and flexible pipelines.

The rigid piping system volume must not exceed 341 gallons.

The flexible piping system volume must not exceed 49.6 gallons.

Tests are conducted at the line operating pressure.

Waiting Time: There is no waiting period between product delivery and testing.

There is no waiting period between last dispensing and testing.

Test Period: Minimum data collection time (response time) is 50 minutes.

This is a single test consisting of multiple cycles of data acquisition with 30 minutes 

waiting time between each cycle.

Test data is acquired and recorded by a permanently installed microprocessor.

Calculations are automatically done by the microprocessor.

System Features: This system is permanently installed on the pipeline and automatically tests the line.

It uses a preset threshold and a single test to determine whether the pipeline is 

leaking.

If a leak is declared, this system displays a message, triggers an alarm, and shuts 

down the dispensing system.

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

the 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
102

Appearance on this list is 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: November 22, 1995

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 exceeds this 

threshold). 

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

Specification: System tests fiberglass and steel piping.

The piping system volume must not exceed 75 gallons.

Tests are conducted at 150% of the line operating pressure.

The mechanical line leak detector must be removed from the piping system being tested.

Waiting Time: Minimum waiting period between product delivery and testing is 6 hours. 

Minimum waiting period between last dispensing and testing is 30 minutes. 

Test Period: The minimum data collection time must be 30 minutes.

Test data must be acquired and recorded manually.

Manual calculations are performed by the tester on site.

Calibration: Equipment 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
103

Appearance on this list is 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: November 22, 1995

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 exceeds this 

threshold). 

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

liquids compatible with the probes.

Capacity: The maximum tank capacity is 12,000 gallons.

Tank must be at least 100% full.

Waiting Time: The test data must be acquired and recorded by a computer that calculates a leak 

rate every minute, and determines waiting time for satisfactory data (the 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 product delivery during the test waiting time.

Test Period: The minimum data collection time must be 70 minutes.

Test data is acquired and recorded by computer.

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

There must be no dispensing or delivery of product during the test.

Temperature: A minimum of 7 temperature sensors (thermistors) must be used to determine the 

average temperature of the stored product.

Groundwater: If the groundwater level is not determined, the tank must pass a two level test with 

at least a 3 foot difference in product level. 

If the groundwater level can be determined, a single level test can be conducted 

provided a net pressure difference of at least 1 psi exists between the groundwater 

and the product at the bottom of the tank.

Calibration: Level sensor must be calibrated before each test.

Temperature sensors must be checked annually and calibrated if necessary.

Comments: This equipment was evaluated at the EPA Edison Risk Reduction Engineering 

Laboratory prior to the standard protocols being written.

This equipment was not evaluated using manifolded tanks.

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
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.

Revision Date: November 22, 1995

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 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.

Capacity: The maximum tank capacity is 15,000 gallons.

Tank must be at least 90% full.

Waiting Time: The test data must be acquired and recorded by a computer that calculates a leak 

rate every minute, and determines waiting time for satisfactory data (the 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 product delivery during the test waiting time.

Test Period: The minimum data collection time must be 70 minutes.

Test data is acquired and recorded by computer.

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

There must be no dispensing or product delivery during the test.

Temperature: A minimum of 7 temperature sensors (thermistors) must be used to determine the 

average temperature of the stored product.

Groundwater: Depth of the water table in the backfill must be determined and if it is above the 

bottom of the tank, product level must be raised to provide a minimum of 1 psi net 

pressure on the bottom of the tank.

Calibration: Level sensor must be calibrated before each test.

Temperature sensors must be checked annually and calibrated if necessary.

Comments: This equipment was not evaluated using manifolded tanks.

This equipment only tests the portion of the tank that 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
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: November 22, 1995

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 exceeds this 

threshold). 

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

Specification: System tests fiberglass and steel piping.

The piping system volume must not exceed 129 gallons.

Tests are conducted at 150% of the line operating pressure.

The mechanical line leak detector must be removed from the pipeline system being 

tested.

Waiting Time: There is no minimum waiting period between product delivery and testing. 

There is no minimum waiting period between last dispensing and testing. 

Test Period: Minimum data collection time is 1 hour (four 15 minute readings).

A one-hour pretest at or above the test pressure is conducted to eliminate the effects of 

pipe deflection/stretch on the results.

Test data is acquired and recorded manually.

Calibration: Equipment 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
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.

Revision Date: November 22, 1995

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 exceeds this 

threshold). 

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

Capacity: The maximum tank capacity is 15,000 gallons.

The tank must be 100% full.

An automatic product leveler must be used to maintain a constant product 

level during the test.

Waiting Time: There is no minimum waiting time between product delivery and test data collection. 

The product must be mixed continuously throughout the test.

There must be no dispensing or product delivery during the test waiting time.

Test Period: The minimum data collection time must be 2 hours after the completion of the high 

level circulation.

The test data must be 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 one hour average volume change).

There must be no dispensing or product delivery during the test.

Temperature: A single sensor is used to determine the temperature of the stored product.

Groundwater: Depth to the water table present in the backfill must be determined, and if it is above 

the bottom of the tank, product level must be adjusted to provide a net pressure of 4 

psi on the bottom of the tank.

Calibration: Temperature sensor is self calibrating.

Level sensor must be checked annually and calibrated if necessary in accordance 

with manufacturer's instructions.

Comments: This equipment was not evaluated using manifolded tanks.

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
107

Appearance on this list is 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: November 22, 1995

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 exceeds this 

threshold). 

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

Capacity: The maximum tank capacity is 15,000 gallons.

The tank must be 100% full.

An automatic product leveler must be used to maintain a constant product level 

during the test.

Waiting Time: There is no minimum waiting time between product delivery and test data collection. 

The product must be mixed continuously throughout the test.

There must be no dispensing or product delivery during the test waiting time.

Test Period: The minimum data collection time must be 2 hours.

Test data is acquired and recorded manually.

Leak rate is calculated based on cumulative volume change during low level test 

(generally based on one hour average volume change).

There must be no dispensing or product delivery during the test.

Temperature: A single DTS-2000 digital sensor is used to determine the temperature of the stored 

product.

Groundwater: Depth to the water table present in the backfill must be determined, and if it is above 

the bottom of the tank, product level must be adjusted to provide a net pressure of 4

psi on the bottom of the tank.

Calibration: Sensors calibration must be checked at each use and the DTS-2000 recertified a 

minimum of once every 3 years.

Comments: This equipment was not evaluated using manifolded tanks.

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
108

Appearance on this list is 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: November 22, 1995

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 exceeds this 

threshold).

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

Specification: System tests fiberglass and steel piping.

The piping system volume must not exceed 129 gallons.

Tests are conducted at 150% of the line operating pressure.

Waiting Time: No waiting time between last delivery of the product to the tank and the start of data 

collection. 

Waiting time between last dispensing of product through the pipeline system and the start 

of data collection is zero hours. 

Test Period: The minimum data collection time for the test must be one and a half hours.

Data must be collected every 15 minutes.

Data collection period consists of a monitor mode and test mode.

Data must be collected in the monitor mode until two consecutive records are within 0.01 

gallon of each other.

Four data points must be taken in the test mode for a final gph result.

Test data is acquired and recorded manually.

Manual calculations performed by the operator on site.

Calibration: No temperature sensors used. 

No calibration required. 

Equipment 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
109

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the method or equipment.

Revision Date: November 22, 1995

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 exceeds this 

threshold).

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

Specification: System tests fiberglass and steel piping.

The piping system volume must not exceed 129 gallons.

Tests are conducted at 150% of the line operating pressure.

Waiting Time: No waiting time between last delivery of the product to the tank and the start of data 

collection. 

Waiting time between last dispensing of product through the pipeline system and the start 

of data collection is zero hours. 

Test Period: The minimum data collection time for the test must be 2 hours.

Data must be collected every 30 seconds.

Data collection period consists of a monitor mode and test mode.

Data must be collected in the monitor mode until two consecutive 15-minute records are 

within 0.01gallon of each other.

An additional 15-minute monitor mode is required before start of the test mode.

Data must be collected in the test mode for 67 minutes for a final gph result.

Test data is acquired and recorded by a microprocessor.

Calculations are automatically done with a microprocessor.

Calibration: Sensors are 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
110

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the method or equipment.

Revision Date: November 22, 1995

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 if the pressure decay is more than 1 inch water column pressure (inch H2O) 

for non-volatile products and 10% of the lower determined pressure for volatile products. 

A leak is also declared if any water incursion is detected. 

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

Capacity: The maximum tank capacity is 12,000 gallons if groundwater is not present.

Larger tanks may be tested if groundwater is present and a negative pressure of 1.0 to 1.7 psi can 

be maintained at the bottom of the tank. 

For gasoline, the ullage volume must be between 800 and 2,500 gallons. 

For diesel, the ullage volume must be between 500 and 1,500 gallons.

Waiting Time: There is no waiting time after product delivery to the tank.

Test Period: The minimum total test time for gasoline is 2.5 hours (1.5 hours vapor equilibrium recirculation time 

plus one hour of data collection time). 

The minimum total test time for diesel and less volatile products is 1.5 hours (0.5 hours vapor 

equilibrium recirculation time plus one hour of data collection). 

The vapor equilibrium recirculation time is the time required to apply a vacuum and to saturate the 

ullage with vapors. 

Test data is acquired and recorded manually.

Water Sensor: A water sensor must be used to detect water incursion and must be calibrated for every test.

The minimum detectable water level for the sensor is 0.014 inches. 

The minimum detectable change in water level is 0.0095 inches. 

The minimum water level in the tank must be adjusted to 0.014 inches before sensor calibration 

begins.

The minimum data collection time for the water sensor is 1 hour. 

The actual water incursion test time depends on the tank size and must be calculated in 

accordance with the manufacturer’s instructions.

Groundwater: Depth to the water table present in the backfill must be determined, and if it is above the bottom of 

the tank, water sensor must be used and test time must be extended to allow sufficient time to 

detect incursion of water into the tank.

Vacuum: The minimum vacuum at bottom of the tank must be 1.0 to 1.7 psi below atmospheric pressure.

The maximum negative pressure at the top of the tank shall not exceed 4.0 psi. 

Comments: This test method may not be effective in some backfill because some backfill (such as clay) may 

plug a hole in the tank.

This test method was not evaluated using manifolded tanks. 

If the soil is saturated with product, this test method may not detect air or water incursion. A well 

point in backfill may help identify presence of this condition.

During the third-party certification, gasoline and diesel was used.

Horner Creative Products Evaluator: Ken Wilcox Associates

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
111

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the method or equipment.

Revision Date: November 22, 1995

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%.

Version 1.0 is designed to meet monthly monitoring requirements. 

Leak Threshold: 0.1 gph (a leak is declared when leak rate exceeds this threshold).

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

Capacity: Maximum tank capacity may not exceed 18,000 gallons.

Data Requirement: A minimum of 30 days of product level and flow through data.

Comments: Of the 120 data sets presented for evaluation, 10 were inconclusive.

The median monthly throughput for tanks used in this evaluation was 13,640 gallons.

This evaluation did not include data from manifolded tanks.

Data sets used in this evaluation were supplied by the evaluator.

A single leak rate of 0.2 gph was used in this evaluation.

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
112

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the method or equipment.

Revision Date: November 22, 1995

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 leak rate exceeds this threshold).

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

Capacity: Maximum tank capacity may not exceed 18,000 gallons.

Data Requirement: A minimum of 30 days of product level and flow through data.

Comments: Of the 120 data sets presented for evaluation, 9 were inconclusive.

The median monthly throughput for tanks used in this evaluation was 11,828 gallons.

This evaluation did not include data from manifolded tanks.

Data sets used in this evaluation were supplied by the evaluator.

A single leak rate of 0.1 gph was used in this evaluation.

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
113

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the method or equipment.

Revision Date: November 22, 1995

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 exceeds this 

threshold). 

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

Capacity: The maximum tank capacity is 12,000 gallons.

The tank must be 100% full.

Waiting Time: Minimum waiting time between product delivery and test data collection must be 6 

hours. 

Minimum waiting time between "topping off" and test data collection must be 3 

hours. 

Total minimum waiting time is 6 hours.

There must be no product dispensing or delivery during the test waiting time.

Test Period: Minimum data collection time must be 1.5 hours (30 minute monitor period, 60 

minute test period). 

Data collection must continue until data meets manufacturer's stop test criteria. 

Volume data is 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 product delivery during the test.

Temperature: Temperature data is collected by a resistance temperature detector (RTD) and 

displayed on a LCD readout.

Groundwater: Depth to the wat er table present in the backfill must be determined, and if it is above 

the bottom of the tank, product level must be adjusted to provide 2-4 psi net 

pressure on the bottom of the tank during the test. 

Groundwater level must be stable prior to and during the test.

Calibration: Level sensors must be calibrated before each test. 

Comments: This equipment was not evaluated using manifolded tanks.

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
114

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the method or equipment.

Revision Date: November 22, 1995

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 exceeds this 

threshold). 

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

Capacity: The maximum tank capacity is 12,000 gallons.

The tank must be 100% full.

Waiting Time: Minimum waiting time between product delivery and test data collection must be 6 

hours. 

Minimum waiting time between "topping off" and test data collection must be 3 

hours. 

Total minimum waiting time is 6 hours.

There must be no product delivery or dispensing during the test waiting time.

Test Period: The minimum data collection time must be one hour and forty minutes (33 minutes 

monitor mode and 67 minutes test mode).

Test data must be acquired and recorded by a computer.

Leak rate is calculated from data of last 67 minutes of test period.

At the conclusion of the test mode, data must be checked for the manufacturer's 

stop test criteria. If data do not meet the criteria, data collection must continue.

There must be no dispensing or product delivery during the test.

Temperature: Temperature data is collected by a resistance temperature detector (RTD).

Groundwater: Depth to the water table present in the backfill must be determined, and if it is above 

the bottom of the tank, product level must be adjusted to provide 2-4 psi net 

pressure on the bottom of the tank during the test.

Groundwater level must be stable prior to and during the test. 

Calibration: Load cell must be calibrated before each use. 

Comments: This equipment was not evaluated using manifolded tanks.

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
115

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the method or equipment.

Revision Date: November 22, 1995

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 exceeds this 

threshold). 

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

Capacity: The maximum tank capacity is 12,000 gallons.

The tank must be between 98 and 100% full.

Waiting Time: Minimum waiting time between product delivery and test data collection must be 8 

hours. 

There must be no product dispensing or delivery during the test waiting time.

Test Period: Minimum data collection time must be one hour and forty minutes (33 minutes 

monitor mode and 67 minutes test mode).

Test data must be acquired and recorded by a computer.

Leak rate is calculated from data of last 67 minutes of test period.

There must be no product delivery or dispensing during the test.

At the conclusion of the test mode, data must be checked for the manufacturer's 

stop test criteria. If data do not meet the criteria, data collection must continue.

Temperature: Temperature data is collected by a resistance temperature detector (RTD).

Groundwater: Depth to the water table present in the backfill must be determined, and if it is above 

the bottom of the tank, product level must be adjusted to provide 1 psi net pressure 

on the bottom of the tank during the 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: This equipment was not evaluated using manifolded tanks.

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
116

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the method or equipment.

Revision Date: November 22, 1995

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 system exceeds this 

threshold). 

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

Capacity: The maximum tank capacity is 18,000 gallons.

The tank must be between 92% and 100% full.

Waiting Time: Minimum waiting time between product delivery and test data collection must be 12 

hours. 

Minimum waiting time between "topping off" and test data collection must be 3 

hours.

There must be no product dispensing or delivery during the waiting time.

Test Period: The minimum data collection time must be 1 hour.

Test data must be acquired and recorded by a computer.

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

There must be no dispensing or product delivery during the test.

Temperature: A minimum of 6 temperature sensors must be used to determine the average 

temperature of the stored product.

Groundwater: Depth to the water table present in the backfill must be determined, and if it is above 

the bottom of the tank, product level must be adjusted to provide 2-4 psi net 

pressure on the bottom of the tank.

Calibration: Level sensors must be calibrated before each test. 

Temperature sensors must be calibrated semi-annually.

Comments: This equipment was not evaluated using manifolded tanks.

This system only tests the portion of the tank containing product.

Ibex Industries Evaluator: Applied Research Center

22014 S. Union Ave., Suite 103 Tel: (805) 664-2173

Bakersfield, CA 93307

Tel: (805) 835-8910 Date of Evaluation: 01/18/91
117

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the method or equipment.

Revision Date: November 22, 1995

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

Test Results:

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

Comments:

*

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

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

designation.

EPA and many states require detection of 1/8 inch of product, which is 0.32 cm. 

This 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
118

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the method or equipment.

Revision Date: November 22, 1995

In-Situ, 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:

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

Manufacturer’s Specification:

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

fuels, and JP4 in wet or dry monitor wells.

Comments:

EPA and many states require detection of 1/8 inch of product, which is 0.32 cm. 

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

In-Situ, Inc. Evaluator: Carnegie Mellon Research Institute

210 S. Third St. Tel: (412) 268-3495

Laramie, WY 82070-0920

Tel: (307) 742-8213 Date of Evaluation: 07/29/91
119

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the method or equipment.

 Revision Date: November 22, 1995

In-Situ, 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:

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

Manufacturer’s Specification:

Type 2 sensor is recommended by manufacturer for detecting diesel, heating oil (No. 1 and 2), A2M, JP4, 

JP5,

gasoline, and alcohol blend fuels in wet monitoring wells only.

Comments:

EPA and many states require detection of 1/8 inch of product, which is 0.32 cm. 

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

In-Situ, Inc. Evaluator: Carnegie Mellon Research Institute

210 S. Third St. Tel: (412) 268-3495

Laramie, WY 82070-0920

Tel: (307) 742-8213 Date of Evaluation: 07/29/91
120

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the method or equipment.

Revision Date: June 24, 1996

INCON Intelligent Controls, Inc.

TS-LLD Line Leak Detector

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 exceeds this 

threshold). 

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

Specification: System is installed on pressurized fiberglass and/or steel piping.

The piping system must not exceed 163 gallons.

Tests are conducted at the line operating pressure.

Waiting Time: There is no waiting time between product delivery and testing.

There is no waiting time between last dispensing and testing.

Test Period: Data collection time is 3 minutes.

Test data is acquired and recorded by the microprocessor.

Calculations are automatically done by the microprocessor.

System Features: This system is permanently installed on the piping and automatically tests the line.

It uses a preset threshold and a single test to determine whether the pipeline is 

leaking.

If a leak is declared, this system shuts down the dispensing system, displays an 

LED alarm light, and displays a numerical “fail” code.

Calibration: Equipment 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 
121

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the method or equipment.

Revision Date: June 24, 1996

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 exceeds this 

threshold). 

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

Specification: System is installed on pressurized fiberglass and/or steel piping.

The piping system must not exceed 163 gallons.

Tests are conducted at the line operating pressure.

Waiting Time: There is no waiting time between product delivery and testing.

There is no waiting time between last dispensing and testing.

Test Period: Data collection time for the rigid piping is 50 minutes to 8 hours.

Test data is acquired and recorded by the microprocessor.

Calculations are automatically done by the microprocessor.

System Features: This system is permanently installed on the piping and automatically tests the line.

It uses a preset threshold and a single test to determine whether the pipeline is 

leaking.

If a leak is declared, this system shuts down the dispensing system, displays an 

LED alarm light, and displays a numerical “fail” code.

Calibration: Equipment must be checked annually in accordance with manufacturer’s instructions.

Comments: The system shuts off the submersible pump after 28 days have elapsed since the 

last monthly line leak test was completed with a passing result. 

The system display will flash the number of days since the last test was passed. 

The 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 the last monthly test, the system will disable the 

dispensing. It will automatically initiate a test and will not authorize dispensing until 

a test is passed or the 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 
122

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the method or equipment.

Revision Date: June 24, 1996

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 exceeds this 

threshold). 

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

Specification: System is installed on pressurized fiberglass and/or steel piping.

The piping system must not exceed 163 gallons.

Tests are conducted at the line operating pressure.

Waiting Time: There is no waiting time between product delivery and testing.

Waiting time between last dispensing of product and testing is 8 hours.

Test Period: Data collection time is 40 minutes.

Test data is acquired and recorded by the microprocessor.

Calculations are automatically done by the microprocessor.

System Features: This system is permanently installed on the piping. The 0.1 gph test is initiated 

manually.

It uses a preset threshold and a single test to determine whether the pipeline is 

leaking.

If a leak is declared, this system shuts down the dispensing system, displays an 

LED alarm light, and displays a numerical “fail” code.

Calibration: Equipment 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 
123

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the method or equipment.

Revision Date: June 24, 1996

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 exceeds this 

threshold). 

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

Specification: System is installed on flexible piping.

The piping system must not exceed 49.6 gallons.

Tests are conducted at the line operating pressure.

Waiting Time: There is no waiting time between product delivery and testing.

There is no waiting time between last dispensing and testing.

Test Period: Data collection time is 3 minutes.

Test data is acquired and recorded by the microprocessor.

Calculations are automatically done by the microprocessor.

System Features: This system is permanently installed on the piping and automatically tests the line.

It uses a preset threshold and a single test to determine whether the pipeline is 

leaking.

If a leak is declared, this system shuts down the dispensing system, displays an 

LED alarm light, and displays a numerical “fail” code.

Calibration: Equipment 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 
124

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the method or equipment.

Revision Date: June 24, 1996

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 exceeds this 

threshold). 

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

Specification: System is installed on flexible piping.

The piping system must not exceed 49.6 gallons.

Tests are conducted at the line operating pressure.

Waiting Time: There is no waiting time between product delivery and testing.

There is no waiting time between last dispensing and testing.

Test Period: Data collection time for the piping is 141 minutes

Test data is acquired and recorded by the microprocessor.

Calculations are automatically done by the microprocessor.

System Features: This system is permanently installed on the piping and automatically tests the line.

It uses a preset threshold and a single test to determine whether the pipeline is 

leaking.

If a leak is declared, this system shuts down the dispensing system, displays an 

LED alarm light, and displays a numerical “fail” code.

Calibration: Equipment must be checked annually in accordance with manufacturer’s instructions.

Comments: The system shuts off the submersible pump after 28 days have elapsed since the 

last monthly line leak test was completed with a passing result. 

The system display will flash the number of days since the last test was passed. 

The 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 the last monthly test, the system will disable 

dispensing. It will automatically initiate a test, and will not authorize dispensing until 

a test is passed or the 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 
125

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the method or equipment.

Revision Date: June 24, 1996

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 exceeds this 

threshold). 

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

Specification: System is installed on flexible piping.

The piping system must not exceed 49.6 gallons.

Tests are conducted at the line operating pressure.

Waiting Time: There is no waiting time between product delivery and testing.

Waiting time between last dispensing of product and testing is 8 hours.

Test Period: Data collection time is 50 minutes.

Test data is acquired and recorded by the microprocessor.

Calculations are automatically done by the microprocessor.

System Features: This system is permanently installed on the piping. The 0.1 gph test is initiated 

manually.

It uses a preset threshold and a single test to determine whether the pipeline is 

leaking.

If a leak is declared, this system shuts down the dispensing system, displays an 

LED alarm light, and displays a numerical “fail” code.

Calibration: Equipment 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 
126

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the method or equipment.

Revision Date: November 22, 1995

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 output of the measurement system exceeds this 

threshold). 

Applicability: Gasoline, diesel, aviation fuel, fuel oil, waste oil, motor oil, and solvents with known 

coefficients of expansion.

Capacity: The maximum tank capacity is 15,000 gallons.

The tank must be between 50 and 95% full.

Waiting Time: Minimum waiting time between product delivery to the tank and test data collection must 

be 4 hours.

Minimum waiting time between last dispensing and test data collection must be 2 hours.

There must be no product delivery during the test waiting time.

Test Period: The minimum data collection time must be 5 hours.

Test data must be 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 product delivery during the test.

Temperature: A minimum of 5 Resistance Temperature Detectors must be used to determine the 

average temperature of the stored hazardous substance. 

Water Sensor: A water sensor must be used to detect water incursion.

Minimum water level detectable in the tank is 1.04 inches.

Minimum detectable water level change is 0.011 inches.

Calibration: Temperature sensors and probe must be checked and calibrated in accordance with

manufacturer's instructions.

Comments: This equipment was not evaluated using manifolded tanks.

This equipment only tests that portion of the tank that contains product.

As the product level is lowered the leak rate in a leaking tank decreases (due to 

lower head pressure).

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
127

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the method or equipment.

Revision Date: November 22, 1995

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 output of the measurement system exceeds this 

threshold). 

Applicability: Gasoline, diesel, aviation fuel, fuel oil, waste oil, and solvents with known coefficients of 

expansion.

Capacity: The maximum tank capacity is 15,000 gallons.

The tank must be between 50 and 95% full.

Waiting Time: Minimum waiting time between product delivery to the tank and test data collection must 

be 6 hours.

Minimum waiting time between last dispensing and test data collection must be 2 hours.

There must be no product delivery during the test waiting time.

Test Period: The minimum data collection time must be 3 hours.

Test data must be acquired and recorded by a computer.

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

There must be no product delivery during the test.

Temperature: A minimum of 5 temperature sensors must be used to determine the average temperature 

of the hazardous substance. 

Water Sensor: A water sensor must be used to detect water incursion.

Minimum water level detectable in the tank is 1.04 inches.

Minimum detectable water level change is 0.011 inches.

Calibration: Temperature sensors and probe must be checked and calibrated in accordance with 

manufacturer's instructions.

Comments: This equipment was not evaluated using manifolded tanks.

This equipment only tests that portion of the tank that contains product.

As the product level is lowered the leak rate in a leaking tank decreases (due to 

lower head pressure).

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
128

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the method or equipment.

Revision Date: November 22, 1995

Keekor Environmental Products

TankTite Leak Detection Kernel Version 1.0 with Keeprobe K7 Magnetostrictive Tank Guage

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 exceeds this 

threshold). 

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

Capacity: The maximum tank capacity is 15,000 gallons.

The tank must be between 50 and 90% full.

Waiting Time: Minimum waiting time between product delivery to the tank and test data collection must 

be 8.1 hours.

Minimum waiting time after a maximum dispensing rate of 50 gallons per minute is 15 

minutes.

There must be no product delivery during the test waiting time.

Test Period: The minimum data collection time must be 3 hours.

Test data must be 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 product delivery during the test.

Temperature: A minimum of 5 Resistance Temperature Detectors must be used to determine the 

average temperature of the stored product. 

Water Sensor: A water sensor must be used to detect water incursion.

Minimum water level detectable in the tank is 0.41 inches.

Minimum change in water level that can be detected is 0.0013 inches.

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: This equipment was not evaluated using manifolded tanks.

This equipment only tests that portion of the tank that contains product.

As the product level is lowered the leak rate in a leaking tank decreases (due to 

lower head pressure).

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
129

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the method or equipment.

Revision Date: November 22, 1995

Lab One Analytical, Inc.

Search

LINE TIGHTNESS TEST METHOD

Certification: Leak rate of 0.05 gph with PD=97.0% and PFA=0%.

Leak Threshold: Detection of tracer chemical.

Applicability: All fluid petroleum products and any other fluid which the tracer is compatible. 

Waiting Time: Waiting period after injection of the tracer into the tank is between one to four weeks. 

For very large fuel systems, several days or weeks may be required to circulate 

tracer labeled fuel through all parts of the system.

Under these circumstances the waiting period begins after the tracer reaches the 

pipeline being tested.

Tracer Dosage: Dosage of tracer is a factor of tank size and the frequency of tank refills according to 

manufacturer's recommendations. 

If the tank system does not operate on a daily basis, another line test method must 

be used.

Permeability: Soil permeability must be sufficient for transport of tracer through the backfill.

Soil permeability is checked by measuring the vacuum readings at sampling 

locations.

The vacuum reading must be 10 inches of mercury or less.

Probe: Radius of influence of each probe is 10 feet.

Locating the pipelines should be done according to the manufacturer’s operating 

procedures for pipeline test results to be valid.

Comments: Presence of frozen, saturated soil above the bottom of the tank may limit the 

effectiveness of this test method.

Presence of groundwater above the bottom of the tank also limit the effectiveness of 

this test method (e.g. when applied to tanks containing water-miscible products or 

products whose specific gravity is greater than one).

Lab One Analytical, Inc. Evaluator: Ken Wilcox Associates

12329 E. 60th St. Tel: (816) 443-2494 

Tulsa, OK 74146

Tel: (918) 250-1013 Date of Evaluation: 01/30/95
130

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the method or equipment.

Revision Date: November 22, 1995

Lab One Analytical, Inc.

Search

NON-VOLUMETRIC TANK TIGHTNESS TEST METHOD (TRACER)

Certification: Leak rate of 0.05 gph with PD=97% and PFA=0%. 

Leak Threshold: Detection of tracer chemical.

Applicability: All fluid petroleum products and any other fluid which the tracer is compatible. 

Capacity: This test method is not limited by tank capacity, however only portions of the tank 

system within 10 feet of sample collection point are tested. 

Waiting Time: Waiting period after injection of the tracer into the tank is 7 to 14 days.

Tracer Dosage: Dosage of tracer is a factor of tank size and number of tank refills according to 

manufacturer's recommendations. 

Permeability: Soil permeability must be sufficient for transport of tracer through the backfill.

Soil permeability is checked by measuring the vacuum readings at sampling 

locations.

The vacuum reading must be 10 inches of mercury or less.

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.

Locating the pipelines should be done according to the manufacturer’s operating 

procedures for pipeline test results to be valid.

Groundwater: Depth to the water table present in the backfill must be determined before addition of 

the tracer to the tank.

If the water table is above the bottom of the tank, throughout the first three days 

following addition of the tracer, the product level must be maintained above the water 

tale such that the hydrostatic pressure of the product will exceed that of the water 

table by 0.33 psi.

Comments: Presence of frozen, saturated soil above bottom of tank may limit the effectiveness of 

this test method.

Presence of groundwater above the bottom of the tank may limit the effectiveness of 

this test method (e.g. when applied to tanks containing water-miscible products or 

products whose specific gravity is greater than one).

Lab One Analytical, Inc. Evaluator: Ken Wilcox Associates

12329 E. 60th St. Tel: (816) 443-2494 

Tulsa, OK 74146

Tel: (918) 250-1013 Date of Evaluation: 01/30/95
131

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the method or equipment.

Revision Date: November 22, 1995

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 if groundwater presence is determined (a leak is declared if the output of 

the measurement system exceeds this threshold).

If using 2 level testing, the level is changed by 3 feet between the two tests and if 

the net change between the two tests is greater than 0.02 gph, a leak is declared.

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

flow under ambient conditions.

Capacity: The maximum tank capacity is 15,000 gallons.

The tank must be 100% full.

Waiting Time: Minimum waiting time between product delivery and test data collection is variable, 

dependent on site conditions, but must not be less than 6 hours. 

Minimum waiting time between "topping off" and test data collection must be 1 hour.

There must be no product dispensing or delivery during the waiting time.

Test Period: The minimum data collection time must be 1 hour.

Test data must be 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 product delivery during the test.

Temperature: A temperature averaging probe must be used to determine the average temperature 

of the stored product.

Groundwater: If depth to the water table is determined and it is above the bottom of the tank, the 

product level must be adjusted to provide height differential of 3 feet between the 

product and water in the backfill.

If depth to the water table is not determined, 2 tests must be performed with a level 

change of at least 3 feet between tests. 

Calibration: The temperature and level sensors must be calibrated before each test. 

Comments: This equipment was not evaluated using manifolded tanks.

The evaluation of this equipment did not include a field evaluation of the 

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
132

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the method or equipment.

Revision Date: November 22, 1995

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:

commercial synthetic jet fuel

gasoline gasoline (JP-4)

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

xylene(s).

Comments:

EPA and many states require detection of 1/8 inch of product, which is 0.32 cm.

Evaluation was conducted on probe FD221G/TRA which has identical performance to probes listed, 

according to manufacturer. 

Probes beginning with "MD" have identical performance as older probes beginning with "FD" according to 

manufacturer. 

The test procedures used were those in 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.

Mallory Controls Evaluator: Radian Corp.

2831 Waterfront Pkwy. E. Dr. Tel: (512) 454-4797

Indianapolis, IN 46214

Tel: (800) 343-2126 Date of Evaluation: 07/08/91
133

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the method or equipment.

Revision Date: November 22, 1995

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:

commercial synthetic jet fuel

gasoline gasoline (JP-4)

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

xylene(s).

Comments:

EPA and many states require detection of 1/8 inch of product, which is 0.32 cm.

Evaluation was conducted on probe FD241R which has identical performance to probes listed, according to 

manufacturer. 

Probes beginning with "MD" have identical performance as older probes beginning with "FD" according to 

manufacturer. 

The test procedures used were those in 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.

Mallory Controls Evaluator: Radian Corp.

2831 Waterfront Pkwy. E. Dr. Tel: (512) 454-4797

Indianapolis, IN 46214

Tel: (800) 343-2126 Date of Evaluation: 07/08/91
134

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the method or equipment.

Revision Date: November 22, 1995

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:

commercial gasoline synthetic gasoline JP-4 

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: commercial gasoline, JP-4 jet fuel, synthetic gasoline, toluene, xylene(s).

Not Activated: n-hexane.

Comments:

Evaluation was conducted on probe FD221V which has identical performance to probes listed, according to 

manufacturer. 

Probes beginning with "MD" have identical performance as older probes beginning with "FD" according to 

manufacturer. 

The test procedures used were those in 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.

Mallory Controls Evaluator: Radian Corp.

2831 Waterfront Pkwy. E. Dr. Tel: (512) 454-4797

Indianapolis, IN 46214

Tel: (800) 343-2126 Date of Evaluation: 07/08/91
135

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the method or equipment.

Revision Date: November 22, 1995

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 exceeds this 

threshold). 

Applicability: Gasoline, diesel, aviation fuels, and solvent.

Specification: System is installed on pressurized fiberglass and steel piping.

The piping system volume must not exceed 55.1 gallons.

Tests are conducted at 5-10 psi.

Waiting Time: There is no waiting period between product delivery and testing.

There is no waiting period between last dispensing and testing.

Test Period: The minimum data collection time (response time) for the test is 1 minute.

Test data must be acquired and recorded by a microprocessor.

Calculations are automatically done by the microprocessor.

System Features: This system is permanently installed on the pipeline and automatically tests the line.

Uses a preset threshold and a single test to determine whether the pipeline is 

leaking.

This system records and displays day, date, time of positive test.

If a leak is declared, this system displays a message, triggers an alarm and shuts 

down the dispensing system.

Calibration: Sensor 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
136

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the method or equipment.

Revision Date: November 22, 1995

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 exceeds this 

threshold). 

Applicability: Gasoline, diesel, aviation fuels, and solvent.

Specification: System is installed on pressurized fiberglass and steel piping.

The piping system volume must not exceed 55.1 gallons.

Tests are conducted at 5-10 psi.

Waiting Time: There is no waiting period between product delivery and testing.

There is no waiting period between last dispensing and testing.

Test Period: The minimum data collection time is 10 minutes.

Test data must be acquired and recorded by a microprocessor.

Calculations are automatically done by the microprocessor.

System Features: This system is permanently installed on the pipeline and automatically tests the line.

Uses a preset threshold and a single test to determine whether the pipeline is 

leaking.

This system records and displays day, date, time of positive test.

If a leak is declared, this system displays a message, triggers an alarm and shuts 

down the dispensing system.

Calibration: Sensor 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
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: November 22, 1995

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 exceeds this 

threshold). 

Applicability: Gasoline, diesel, aviation fuels, and solvent.

Specification: System is installed on pressurized fiberglass and steel piping.

The piping system volume must not exceed 55.1 gallons.

Tests are conducted at 5-10 psi.

Waiting Time: There is no waiting period between product delivery and testing.

There is no waiting period between last dispensing and testing.

Test Period: The minimum data collection time must be 2.5 hours.

Test data must be acquired and recorded by a microprocessor.

Calculations are automatically done by the microprocessor.

System Features: This system is permanently installed on the pipeline and automatically tests the line.

Uses a preset threshold and a single test to determine whether the pipeline is 

leaking.

This system records and displays day, date, time of positive test.

If a leak is declared, this system displays a message, triggers an alarm and shuts 

down the dispensing system.

Calibration: Sensor 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
138

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the method or equipment.

Revision Date: November 22, 1995

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 exceeds this 

threshold). 

Applicability: Gasoline, diesel, aviation fuel and solvent.

Specification: System is installed on pressurized fiberglass and steel piping.

The piping system volume must not exceed 129 gallons.

Tests are conducted at 8-12 psi.

Waiting Time: There is no waiting period between product delivery and testing.

There is no waiting period between last dispensing and testing.

Test Period: The minimum test time (response time) is 6 seconds.

System Features: This system is permanently installed on the piping and automatically tests the line.

It uses a preset threshold and a single test to determine whether the piping is leaking.

If a leak is detected, this system restricts fuel flow to dispenser.

Calibration: Equipment 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
139

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the method or equipment.

Revision Date: November 22, 1995

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 exceeds this 

threshold). 

Applicability: Gasoline, diesel, aviation fuel and some solvents.

Specification: System is installed on pressurized fiberglass or steel piping.

The piping system volume must not exceed 158 gallons.

Tests are conducted at 8-12 psi.

Waiting Time: There is no waiting period between delivery and testing.

There is no waiting period between last dispensing and testing.

Stabilization time up to 45 minutes after dispensing may be required when 

temperature extremes are present.

Test Period: The test time (response time) is less than 5 minutes.

System Features: This system is permanently installed on the piping and automatically tests the line.

It uses a preset threshold and a single test to determine whether the piping is leaking.

If a leak is detected, this system restricts flow to the dispenser.

Calibration: Equipment 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
140

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the method or equipment.

Revision Date: November 22, 1995

Marley Pump Co.

Red Jacket FX1/FX2 Flexline 

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 exceeds this 

threshold). 

Applicability: Gasoline, diesel, aviation fuel and some solvents.

Specification: System is installed on pressurized flexible pipelines.

The piping system volume must not exceed 49 gallons.

Waiting Time: There is no waiting period between delivery and testing.

There is no waiting period between last dispensing and testing.

Test Period: The test time (response time) is less than 3 minutes.

System Features: This system is permanently installed on the piping and automatically tests the line.

It uses a preset threshold and a single test to determine whether the piping is leaking.

If a leak is detected, this system restricts flow to the dispenser.

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

manufacturer’s instructions.

Comments: Enviroflex pipeline was used during this evaluation which had a bulk modulus of 1,280 

psi. 

In order for the leak detector to have adequate test, time delays must be integrated into 

the electronic dispensing equipment or retrofitted in the junction box.

Without this delay, the nozzles cannot be guaranteed being closed for sufficient time to 

allow the leak detector to compile its line test and provide uninterrupted service.

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
141

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the method or equipment.

Revision Date: November 22, 1995

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 exceeds this 

threshold). 

Applicability: Gasoline, diesel.

Specification: System is installed on pressurized fiberglass or steel piping.

The piping system volume must not exceed 362 gallons.

Tests are conducted at 8-12 psi.

Waiting Time: There is no waiting period between delivery and testing.

There is no waiting period between last dispensing and testing.

Stabilization time up to 45 minutes after dispensing may be required when 

temperature extremes are present.

Test Period: The minimum test time (response time) is 3 minutes.

System Features: This system is permanently installed on the piping and automatically tests the line.

It uses a preset threshold and a single test to determine whether the piping is leaking.

If a leak is detected, this system restricts flow to the dispenser.

Calibration: Equipment 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
142

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the method or equipment.

Revision Date: November 22, 1995

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 exceeds this 

threshold). 

Applicability: Gasoline, diesel, aviation fuel and solvent.

Specification: System is installed on pressurized fiberglass and steel piping.

The piping system volume must not exceed 129 gallons.

Tests are conducted at 15-22 psi.

Waiting Time: There is no waiting period between delivery and testing.

There is no waiting period between last dispensing and testing.

Test Period: The minimum test time (response time) is 6 seconds.

System Features: This system is permanently installed on the piping and automatically tests the line.

It uses a preset threshold and a single test to determine whether the piping is leaking.

If a leak is detected, this system restricts fuel flow to dispenser.

Calibration: Equipment 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
143

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the method or equipment.

Revision Date: November 22, 1995

Marley Pump Co.

Red Jacket XLP for Flexible Lines

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 exceeds this 

threshold). 

Applicability: Gasoline, diesel, aviation fuel and solvent.

Specification: System is installed on pressurized flexible piping.

The piping system volume must not exceed 48.9 gallons.

Tests are conducted at operating pressure.

Waiting Time: There is no waiting period between delivery and testing.

There is no waiting period between last dispensing and testing.

Test Period: The minimum test time (response time) is less than 3 minutes.

System Features: This system is permanently installed on the piping and automatically tests the line.

It uses a preset threshold and a single test to determine whether the piping is leaking.

If a leak is detected, this system restricts fuel flow to dispenser.

Calibration: Equipment 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
144

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the method or equipment.

 Revision Date: November 22, 1995

Marley Pump Co.

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

ATG Automatic Tank Gauging Monitor, LLM Series Liquid Level Monitor

FMS Fuel Management Monitor

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 exceeds this 

threshold). 

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

Capacity: The maximum tank capacity is 18,000 gallons.

The tank must be between 50 and 95% full.

Waiting Time: Minimum waiting time between product delivery to the tank and test data collection must 

be 10 hours.

There is no minimum waiting time after dispensing.

There must be no product delivery during the test waiting time.

Test Period: The minimum data collection time must be 2.35 hours.

Test data must be acquired and recorded by a computer.

Leak rate is calculated from all data collected.

There must be no dispensing or product delivery during the test.

Temperature: A variable number of temperature sensors spaced at approximately six-inch intervals are 

used to determine the average temperature of the stored product. 

Water Sensor: A water sensor must be used to detect water incursion.

Minimum water level detectable in the tank is 0.112 inches.

Minimum detectable water level change is 0.011 inches.

Calibration: Temperature sensors and probe must be checked and calibrated in accordance with 

manufacturer's instructions.

Comments: This equipment was not evaluated using manifolded tanks.

This equipment only tests that portion of the tank that contains product.

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

pressure).

This system was previously known as the 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
145

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the method or equipment.

Revision Date: November 22, 1995

Marley Pump Co.

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

ATG Automatic Tank Gauging Monitor, LLM Series Liquid Level Monitor,

FMS Fuel Management Monitor

AUTOMATIC TANK GAUGING SYSTEM

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 measurement system exceeds this 

threshold). 

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

Capacity: The maximum tank capacity is 18,000 gallons.

The tank must be 95% full.

Waiting Time: Minimum waiting time between product delivery to the tank and test data collection must 

be 12 hours.

There is no minimum waiting time after dispensing.

There must be no product delivery during the test waiting time.

Test Period: The minimum data collection time must be 2.35 hours.

Test data must be acquired and recorded by a computer.

Leak rate is calculated from all data collected.

There must be no dispensing or product delivery during the test.

Temperature: A variable number of temperature sensors spaced at approximately six-inch intervals are 

used to determine the average temperature of the stored product. 

Water Sensor: A water sensor must be used to detect water incursion.

Minimum water level detectable in the tank is 0.112 inches.

Minimum detectable water level change is 0.011 inches.

Calibration: Temperature sensors and probe must be checked and calibrated in accordance with 

manufacturer's instructions.

Comments: This equipment was not evaluated using manifolded tanks.

This equipment only tests that portion of the tank that contains product.

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

pressure).

This system was previously known as the 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
146

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the method or equipment.

Revision Date: November 22, 1995

Marley Pump Co.

Red Jacket ATM System, 

Version RLM 5000, 5001, and 9000

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 exceeds this 

threshold). 

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

Capacity: The maximum tank capacity is 15,000 gallons.

The tank must be between 50 and 95% full.

Waiting Time: Minimum waiting time between product delivery to the tank and test data collection must 

be 6 hours.

There must be no dispensing or product delivery during the test waiting time.

Test Period: The minimum data collection time must be 3 hours.

Test data must be acquired and recorded by a computer.

Leak rate is calculated from all data collected.

There must be no dispensing or product delivery during the test.

Temperature: A minimum of 5 temperature sensors must be used to determine the average temperature 

of the stored hazardous substance. 

Water Sensor: A water sensor must be used to detect water incursion.

Minimum water level detectable in the tank is 1.04 inches.

Minimum detectable water level change is 0.011 inches.

Calibration: Temperature sensors and probe must be checked and calibrated in accordance with 

manufacturer's instructions.

Comments: This equipment was not evaluated using manifolded tanks.

This equipment only tests that portion of the tank that contains product.

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

pressure).

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
147

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the method or equipment.

Revision Date: November 22, 1995

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

commercial synthetic diesel home 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 commercial gasoline, synthetic fuel, diesel fuel, home 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 of product, which is 0.32 cm, for groundwater monitoring.

The detectors are listed as interstitial due to intended use. 

The test procedures used were those in 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 evaluation lists all PPM, RLM, and ST models, including the Multiplexer Unit; however, evaluation 

procedures were done with PPM 4000. 

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
148

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the method or equipment.

 Revision Date: November 22, 1995

Mine Safety Appliances

Tankgard

Version: 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
149

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the method or equipment.

 Revision Date: November 22, 1995

Mine Safety Appliances

Tankgard VIII

Version: 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
150

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the method or equipment.

Revision Date: November 22, 1995

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 exceeds this 

threshold).

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

Specification: System tests fiberglass and steel piping.

The piping system volume must not exceed 41 gallons.

Tests are conducted at 150% of the line operating pressure.

Mechanical line leak detector must be removed from the pipeline system being tested.

Waiting Time: No waiting time between last delivery of the product to the tank and the start of data 

collection. 

Minimum waiting time between last dispensing and testing is one hour. 

Test Period: The minimum data collection time for the test must be one hour.

Pipe deflection, vapor pockets, and large temperature differences may produce 

inconsistent readings, testing to continue until stable conditions are present.

Test data must be 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
151

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the method or equipment.

Revision Date: November 22, 1995

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 exceeds this 

threshold).

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

Specification: System tests fiberglass and steel piping.

The piping system volume must not exceed 40 gallons.

Tests are conducted at 150% of the line operating pressure.

Mechanical line leak detector must be removed from the pipeline system being tested.

Waiting Time: There is no minimum waiting period between product delivery and testing. 

Minimum waiting period between last dispensing and testing is one hour. 

Test Period: The minimum data collection time must be 10 minutes per cycle.

Test data is 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
152

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the method or equipment.

Revision Date: November 22, 1995

NDE Environmental Corp.

UTS-4T Ullage Test

NON-VOLUMETRIC TANK TIGHTNESS TEST METHOD (ULLAGE)

Certification: Leak rate of 0.1 gph with PD=95.24% and PFA=0%. 

Leak Threshold: Make-up gas flow rate into ullage exceeding 0.275 cubic feet/hour.

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

Capacity: Maximum ullage volume is 7,500 gallons.

Waiting time: At least 2 hours between the end of adding the product and the start of data collection. 

Test Period: Data collection time is at least 30 minutes.

Test data is acquired and recorded manually.

Test Pressure: The pressure in the ullage portion of the tank is increased such that the net pressure at 

the bottom of tank (sum of ullage pressure and product head) does not exceed 5.0 psi. 

It is maintained for a minimum of 5 minutes per 1,000 gallons of ullage. 

At the conclusion of this stabilization period, the ullage pressure is reduced by 0.5 psi 

for the remainder of the test.

Temperature: Temperature of the ullage must be monitored, and the rate of change of ullage 

temperature must not exceed manufacturer's tabulated values.

Groundwater: Depth to the water table present in the backfill must be determined, and if it is above 

the

product level, the net outward pressure must exceed 1 psi throughout the ullage.

Comments: The product portion of the tank must be tested using a volumetric underfilled test.

This test method was third-party certified using #2 diesel fuels as the test product.

This test method was third-party certified using manifolded tanks.

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
153

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the method or equipment.

Revision Date: November 22, 1995

NDE Environmental Corp.

UST Ullage Test - Version ProEco U2

NON-VOLUMETRIC TANK TIGHTNESS TEST METHOD (ULLAGE)

Certification: Leak rate of 0.1 gph with PD=95.24% and PFA=0%. 

Leak Threshold: Pressure decay trend not to exceed ± 0.016 psi/hr

Applicability: Gasoline, diesel, aviation fuel, heavy fuel oils (#2 through #6), and solvents

Capacity: Maximum ullage volume is 10,260 gallons.

Waiting time: At least 2 hours between the end of adding the product and the start of data collection. 

Test Period: Data collection time is at least 30 minutes (after data trend has been established). 

Test Pressure: During the test, a total of 4.0 psi pressure at the bottom of the tank is appllied.

Temperature: Temperature of the ullage portion of the tank is monitored during the test.

A correction factor is applied to account for temperature changes.

The correction factor is not applicable for ullage temperature changes greater than 5 

degrees F (test must not be conducted).

Groundwater: Depth to the water table present in the backfill must be determined.

If it is above the product level, the ullage test pressure is maintained at a minimum of 

1.0 psi higher than the pressure exerted by the water table.

Comments: The product portion of the tank must be tested using a volumetric underfilled test.

This test method was third-party certified using #2 diesel fuel as the test product.

This test method was third-party certified using manifolded tanks.

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
154

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the method or equipment.

 Revision Date: November 22, 1995

NDE Environmental Corp.

U3 Ullage Test (Vacuum or Pressure)

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 if the noise signal detected is different from the baseline.

(Baseline is the noise signal before pressure or vacuum is applied to the tank.)

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

Capacity: Maximum ullage volume is 16,500 gallons.

Waiting Time: There is no waiting time required after product delivery to the tank.

Test Period: The data collection time (determination of background noise and a leak) is a few 

minutes.

After the desired pressure has been reached, the tank should be allowed to settle 

for ten minutes.

Test period also depends on background noise at the site and on the size of the leak. 

Test Pressure: A vacuum blower to produce a vacuum of 1 psi in the ullage portion is used.

Or, a nitrogen pressure of 4 psi at the tank bottom is applied.

Temperature: Acoustic signal is independent of product temperature.

Groundwater: Depth to the water table present in the backfill must be determined.

If it is above the product level, a vacuum test should not be used.

The pressure test may only be used if the ullage test pressure is maintained at a 

minimum of 1.0 psi higher than the pressure exerted by the water table.

If this requires more than 5 psi at tank bottom, then the ullage test should not be used.

Comments: This test method tests only the ullage portion on the tank; the product portion of the 

tank must be tested with an underfilled test method.

This test method was third-party certified using #2 diesel fuel as the test product.

During the third-party testing, the microphone was 25 feet away from the leak source.

Excess background noise can be a factor in the test result. If background noise is too 

high, the test is inconclusive. 

Noise signals are tape recorded (not digitally recorded).

This test method was not third-party certified with manifolded tanks.

When testing with vacuum, this test method may not be effective in some backfill 

because some particles (such as clay) may plug holes in the tank.

If soil is saturated with product, this test will not detect air or water ingress.

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
155

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the method or equipment.

Revision Date: November 22, 1995

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 exceeds this 

threshold). 

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

products.

Capacity: The maximum tank capacity is 18,000 gallons.

The tank must contain at least 24 inches of product.

Waiting Time: The waiting time between product delivery to the tank and test data collection must 

be long enough to ensure a temperature change of less than 0.09 degrees F/hour, 

typically at least 2 hours.

There is no waiting time after dispensing.

There must be no product delivery during the test waiting time.

Test Period: The minimum data collection time must be 2 hours.

Test data must be acquired and recorded by a computer.

Leak rate is calculated from average over data window.

There must be no dispensing or product delivery during the test.

Temperature: Typically 5 thermistors are used to determine the average temperature of the stored 

product. A minimum of one is required.

Groundwater: Depth to the water table present in the backfill must be determined, and if it is above 

the bottom of the tank, the product level in the tank is adjusted to provide minimum 

of 1 psi pressure differential, positive or negative, on the bottom of the tank during 

the test.

Calibration: Sensors must be checked annually and calibrated if necessary.

Comments: The equipment was not evaluated using manifolded tanks.

This equipment only tests the portion of tank that contains product.

As the product level is lowered the leak rate in a leaking tank decreases (due to

lower head pressure.

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
156

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the method or equipment.

Revision Date: November 22, 1995

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 exceeds this 

threshold). 

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

Capacity: The maximum tank capacity is 18,000 gallons.

The tank being tested must be between 11% and 95% full.

Waiting Time: Minimum waiting time between product delivery to the tank and test data collection 

must be 6 hours.

There is no minimum waiting time after dispensing.

There must be no product delivery during the test waiting time.

Test Period: The minimum data collection time must be 3 hours.

Test data must be acquired and recorded by a computer.

Leak rate is calculated from average of subsets of all collected data.

There must be no dispensing or product delivery during the test.

Temperature: A minimum of 12 inches of product must be present for the temperature probes to 

operate properly.

Groundwater: Depth to the water table present in the backfill must be determined, and if it is above 

the bottom of the tank, the product level in the tank is adjusted to provide minimum 

of 1 psi net pressure on the bottom of the tank during the test. There must be at 

least 37 inches of gasoline in a tank to create 1 psi net pressure on the bottom.

Calibration: Temperature probes and floats must be checked for proper operation prior to each 

test.

Comments: The equipment was not evaluated using manifolded tanks.

This equipment only tests the portion of tank that contains product.

As the product level is lowered the leak rate in a leaking tank decreases (due to

lower head pressure.

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
157

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the method or equipment.

 Revision Date: November 22, 1995

Omntec/Electro Levels

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)

water gasoline diesel water gasoline diesel

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) 6.45 6.63 6.53 21.7 21.7 21.8

PDWS-1 PDWF-1

water gasoline diesel water gasoline diesel

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) 1.63 1.93 1.85 1.02 1.60 1.67

PDS-ASC/LS-ASC

water gasoline diesel

Accuracy (%) 100 100 100

Detection time (sec) < 1 < 1 < 1

Fall time (sec) < 1 < 1 < 1

Lower detection limit (cm) 1.42 2.24 2.11

Specificity Results:

Activated: commercial gasoline, synthetic gasoline, diesel fuel, jet-A fuel, n-hexane, 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 of product, which is 0.32 cm, for groundwater monitoring. 

The detectors are listed as interstitial due to intended use. 

The test procedures used were modified from 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: Non-Volumetric Tank Tightness Test Methods,” March 

1990.

Detectors are reusable. 

Omntec/Electro Levels Evaluator: Ken Wilcox Associates

1993 Pond Rd. Tel: (816) 443-2494

Ronkonkoma, NY 11779

Tel: (516) 467-5787 Date of Evaluation: 06/12/93
158

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the method or equipment.

Revision Date: June 19, 1996

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 exceeds this 

threshold.)

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

determined to be compatible with probe. 

Capacity: The maximum tank capacity is 15,000 gallons.

The tank must be between 50 and 95% full.

Waiting Time: Minimum waiting time between product delivery to the tank and test data collection must 

be 6.5 hours.

There must be no product delivery during the test waiting time.

Test Period: The minimum data collection time must be 4 hours.

Test data must be acquired and recorded by computer.

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

There must be no dispensing or product delivery during the test.

Temperature: A minimum of 5 thermistors must be used to determine the average temperature of the 

stored product. 

Water Sensor: A water sensor must be used to detect water incursion.

Minimum water level detectable in the tank is 0.055 inches.

Minimum change in water level that can be detected is 0.011 inches.

Calibration: Temperature sensors and probes must be checked and calibrated in accordance with 

manufacturer's instructions.

Comments: This equipment was not evaluated using manifolded tanks.

This equipment only tests the portion of the tank that contains product.

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

pressure).

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
159

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the method or equipment.

Revision Date: June 19, 1996

Omntec/Electro Levels Mfg., Inc.

OEL 8000 (Magnetosrictive 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 exceeds this 

threshold.)

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

determined to be compatible with probe. 

Capacity: The maximum tank capacity is 15,000 gallons.

The tank must be between 50 and 95% full.

Waiting Time: Minimum waiting time between product delivery to the tank and test data collection must 

be 6.5 hours.

There must be no product delivery during the test waiting time.

Test Period: The minimum data collection time must be 4 hours.

Test data must be acquired and recorded by computer.

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

There must be no dispensing or product delivery during the test.

Temperature: A minimum of 5 thermistors must be used to determine the average temperature of the 

stored product. 

Water Sensor: A water sensor must be used to detect water incursion.

Minimum water level detectable in the tank is 0.055 inches.

Minimum change in water level that can be detected is 0.011 inches.

Calibration: Temperature sensors and probes must be checked and calibrated in accordance with 

manufacturer's instructions.

Comments: This equipment was not evaluated using manifolded tanks.

This equipment only tests the portion of the tank that contains product.

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

pressure).

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
160

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the method or equipment.

 Revision Date: November 22, 1995

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:

commercial 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: commercial gasoline, n-hexane, diesel fuel, jet-A fuel, toluene, synthetic gasoline, 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 of product, which is 0.32 cm. 

This 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
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: November 22, 1995

Patriot Sensors and Controls Corp.

7021 Digital Tank Gauge

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 exceeds this 

threshold.)

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

specific gravity >0.6 and a viscosity <1500 cp. 

Capacity: The maximum tank capacity is 15,000 gallons.

The tank must be between 50% to 95% full.

Waiting Time: Minimum waiting time between product delivery and test data collection must be 2 hours.

There must be no dispensing or product delivery during the test waiting time.

Test Period: The minimum data collection time must be 4 hours.

Test data must be acquired and recorded by the 7021 controller (computer).

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

There must be no dispensing or product delivery during the test.

Temperature: Minimum of 1 resistance temperature detector must be used to determine the average 

temperature of the stored product. 

Water Sensor: A water sensor must be used to detect water incursion.

Minimum water level detectable in the tank is 0.947 inches.

Minimum detectable water level change is 0.0254 inches.

Calibration: Temperature sensors and probes must be checked and calibrated in accordance with 

manufacturer's instructions.

Comments: This equipment was not evaluated using manifolded tanks.

This equipment tests only that portion of the tank which contains product.

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

lower head pressure.

This equipment was originally manufactured by MagneTek (Patriot’s predecessor).

Change in product volume is measured using a magnetostrictive probe.

This 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.

This threshold is calculated based on PD = 95% and PFA = 5%.

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
162

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the method or equipment.

Revision Date: November 22, 1995

Patriot Sensors and Controls Corp.

7021 Digital Tank Gauge

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 exceeds this 

threshold.)

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

specific gravity >0.6 and a viscosity <1500 cp. 

Capacity: The maximum tank capacity is 15,000 gallons.

The tank must be between 50% to 95% full.

Waiting Time: Minimum waiting time between product delivery and test data collection must be 8 hours.

There must be no dispensing or product delivery during the test waiting time.

Test Period: The minimum data collection time must be 4 hours.

Test data must be acquired and recorded by the 7021 controller (computer).

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

There must be no dispensing or product delivery during the test.

Temperature: Minimum of 1 resistance temperature detector must be used to determine the average 

temperature of the stored substance. 

Water Sensor: A water sensor must be used to detect water incursion.

Minimum water level detectable in the tank is 0.947 inches.

Minimum detectable water level change is 0.0254 inches.

Calibration: Temperature sensors and probes must be checked and calibrated in accordance with 

manufacturer's instructions.

Comments: This equipment was not evaluated using manifolded tanks.

This equipment only tests that portion of the tank which contains product.

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

lower head pressure.

This equipment was originally manufactured by MagneTek (Patriot’s predecessor).

Change in product volume is measured using a magnetostrictive probe.

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
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: November 22, 1995

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: *

commercial

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, home heating oil #2.

Not activated: water.

Comments:

The test procedures used were those in 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.

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
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: November 22, 1995

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: *

commercial

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, home heating oil #2.

Comments:

The test procedures used were those in 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.

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
165

Appearance on this list is 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: November 22, 1995

PermAlert

TankWatch Models PHM10, PHMS

Hydrocarbon Probe

LIQUID-PHASE INTERSTITIAL DETECTOR

Detector:

Output type: qualitative

Sampling frequency: continuous

Operating principle: electrical conductivity

Test Results: *

commercial

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, home heating oil #2.

Not activated: water.

Comments:

The test procedures used were those in 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.

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
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: November 22, 1995

PermAlert

PAL-AT Models AT20C, AT50C, AT40K

AGW Sensor Cable

LIQUID-PHASE OUT-OF-TANK PRODUCT DETECTOR

Detector:

Output type: qualitative for presence of product

quantitative for location

Sampling frequency: continuous

Operating principle: impedance change

Test Results: *

commercial 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.

**MER is Maximum Effective Range, the longest length of sensor cables and /or jumper cables that can be 

connected to form a leak detection network.

*** See glossary.

Specificity Results:

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

Comments:

EPA and many states require detection of 1/8 inch of product, which is 0.32 cm, for groundwater monitoring. 

System can monitor interstitial spaces. 

The test procedures used were those in 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: 01/17/92
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: November 22, 1995

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:

commercial 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: commercial gasoline, n-hexane, diesel fuel, jet-A fuel, toluene, synthetic gasoline, 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 of product, which is 0.32 cm. 

The 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
168

Appearance on this list is 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: November 22, 1995

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:

commercial 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: commercial gasoline, n-hexane, diesel fuel, jet-A fuel, toluene, synthetic gasoline, 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 of product, which is 0.32 cm. 

This detector is not reusable.

The 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
169

Appearance on this list is 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: November 22, 1995

PermAlert

PAL-AT Models AT20C, AT50C, AT40K

TFH Hydrocarbon Sensor Cable

LIQUID-PHASE OUT-OF-TANK PRODUCT DETECTOR

Detector:

Output type: qualitative for presence of product

quantitative for location 

Sampling frequency: continuous

Operating principle: impedance change

Test Results: *

commercial 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.

**MER is Maximum Effective Range, the longest length of sensor cables and /or jumper cables that can be 

connected to form a leak detection network.

** See glossary.

Specificity Results:

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

Not Activated: water.

Comments:

EPA and many states require detection of 1/8 inch of product, which is 0.32 cm, for groundwater monitoring. 

System can monitor interstitial spaces. 

The test procedures used were those in 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
170

Appearance on this list is 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: November 22, 1995

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 exceeds this 

threshold.)

Applicability: Gasoline, diesel, aviation fuel, and solvents

Capacity: The maximum tank capacity is 15,000 gallons.

The tank must be between 50 and 95% full.

Waiting Time: Minimum waiting time between delivery to the tank and test data collection must be 12 

hours.

There must be no dispensing or product delivery during the test waiting time.

Test Period: The minimum data collection time must be 4 hours.

Test data is acquired and recorded by computer.

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

There must be no product delivery during the test waiting time.

Temperature: A minimum of 5 Resistance Temperature Detectors must be used to determine the average 

temperature of the stored product. 

Water Sensor: A water sensor must be used to detect water incursion.

Minimum water level detectable in the tank is 0.92 inches.

Minimum detectable change in water level is 0.02 inches.

Calibration: Temperature sensors and probe must be checked and calibrated in accordance with 

manufacturer's instructions.

Comments: This equipment was not evaluated using manifolded tanks.

This equipment only tests the portion of the tank that contains product.

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

pressure).

Petrosonic III version 4.04 is an older model Tank Gauging System, and is no longer being 

marketed.

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
171

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the method or equipment.

Revision Date: November 22, 1995

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 exceeds this 

threshold.)

Applicability: Gasoline, diesel, aviation fuel, and solvents

Capacity: The maximum tank capacity is 15,000 gallons.

The tank must be between 50 and 95% full.

Waiting Time: Minimum waiting time between delivery to the tank and test data collection must be 12 

hours.

There must be no dispensing or product delivery during the test waiting time.

Test Period: The minimum data collection time must be 4 hours.

Test data is acquired and recorded by computer.

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

There must be no dispensing or product delivery during the test.

Temperature: A minimum of 5 Resistance Temperature Detectors must be used to determine the average 

temperature of the stored product. 

Water Sensor: A water sensor must be used to detect water incursion.

Minimum water level detectable in the tank is 2.47 inches.

Minimum detectable change in water level is 0.037 inches.

Calibration: Temperature sensors and probe must be checked and calibrated in accordance with 

manufacturer's instructions.

Comments: This equipment was not evaluated using manifolded tanks.

This equipment only tests the portion of the tank that contains product.

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

pressure).

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
172

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the method or equipment.

Revision Date: November 22, 1995

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 exceeds this 

threshold.)

Applicability: Gasoline, diesel, aviation fuel, and solvents

Capacity: The maximum tank capacity is 15,000 gallons.

The tank must be between 50 and 95% full.

Waiting Time: Minimum waiting time between delivery to the tank and test data collection must be 12 

hours.

There must be no dispensing or product delivery during the test waiting time.

Test Period: The minimum data collection time must be 2 hours.

Test data is acquired and recorded by computer.

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

There must be no dispensing or product delivery during the test.

Temperature: A minimum of 5 Resistance Temperature Detectors must be used to determine the average 

temperature of the stored product. 

Water Sensor: A water sensor must be used to detect water incursion.

Minimum water level detectable in the tank is 0.92 inches.

Minimum detectable change in water level is 0.02 inches.

Calibration: Temperature sensors and probe must be checked and calibrated in accordance with 

manufacturer's instructions.

Comments: This equipment was not evaluated using manifolded tanks.

This equipment only tests the portion of the tank that contains product.

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

pressure).

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
173

Appearance on this list is 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: November 22, 1995

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 exceeds this 

threshold.)

Applicability: Gasoline, diesel, aviation fuel, and solvents

Capacity: The maximum tank capacity is 15,000 gallons.

The tank must be at least 90% full.

Waiting Time: Minimum waiting time between delivery to the tank and test data collection must be 12 

hours.

There must be no dispensing or product delivery during the test waiting time.

Test Period: The minimum data collection time must be 4 hours.

Test data is acquired and recorded by computer.

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

There must be no dispensing or product delivery during the test.

Temperature: A minimum of 5 Resistance Temperature Detectors must be used to determine the average 

temperature of the stored product. 

Water Sensor: A water sensor must be used to detect water incursion.

Minimum water level detectable in the tank is 0.92 inches.

Minimum detectable change in water level is 0.02 inc hes.

Calibration: Temperature sensors and probe must be checked and calibrated in accordance with 

manufacturer's instructions.

Comments: This equipment was not evaluated using manifolded tanks.

This equipment only tests the portion of the tank that contains product.

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

pressure).

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
174

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the method or equipment.

Revision Date: November 22, 1995

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: *

commercial

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, home heating oil #2, water.

Comments:

The test procedures used were those in 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.

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
175

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the method or equipment.

Revision Date: November 22, 1995

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:

This point sensor is intended to monitor the level of either ethylene glycol or calcium chloride solutions in the 

interstitial or annular space of a double-walled tank, by triggering an alarm if any significant gain or loss of 

solution occurs. 

Evaluation was performed using procedures 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, modified to accommodate the intended purpose.

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
176

Appearance on this list is 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: November 22, 1995

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: *

commercial

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, home heating oil #2, water.

Comments:

The test procedures used were those in 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.

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
177

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the method or equipment.

Revision Date: November 22, 1995

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:

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

Manufacturer’s specifications:

Conductive polymer.

Comments:

EPA and many states require detection of 1/8 inch of product, which is 0.32 cm. 

This detector is reusable.

The third party evaluators identified these sensors as identical to One Plus Corporation’s Models 100-3001 

and 100-4001 Leak Edge Hydrocarbon Leak Monitor System. The evaluation was abbreviated and used 

some data from the One Plus system evaluation. 

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
178

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the method or equipment.

Revision Date: November 22, 1995

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:

commercial synthetic

gasoline gasoline JP-4

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: commercial gasoline, synthetic gasoline, JP-4 jet fuel, n-hexane, toluene, xylene(s).

Comments:

The test procedures used were those in 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
179

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the method or equipment.

Revision Date: November 22, 1995

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
180

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the method or equipment.

 Revision Date: November 22, 1995

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:

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

Comments:

EPA and many states require detection of 1/8 inch of product, which is 0.32 cm, for groundwater monitoring.

This system is listed as interstitial. 

Evaluation followed 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: Non-Volumetric Tank Tightness Testing Methods."

The 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
181

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the method or equipment.

Revision Date: November 22, 1995

Raychem Corp.

TraceTek Alarm and Locator Modules 

TT502 Fuel Sensing Cable 

LIQUID-PHASE OUT-OF-TANK PRODUCT DETECTOR

Detector:

Output type: qualitative for presence of product

quantitative for location 

Sampling frequency: continuous

Operating principle: electrical conductivity

Test Results: *

commercial 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.

**MER is Maximum Effective Range, the longest length of sensor cables and /or jumper cables that can be 

connected to form a leak detection network.

** See glossary.

Specificity Results:

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

Not Activated: water.

Comments:

EPA and many states require detection of 1/8 inch of product, which is 0.32 cm, for groundwater monitoring.

The test procedures used were those in 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
182

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the method or equipment.

Revision Date: November 22, 1995

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 exceeds this 

threshold). 

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

Specification: System is installed on pressurized fiberglass and steel piping.

The piping system volume must not exceed 45 gallons.

Tests are conducted at the line operating pressure.

The mechanical line leak detector must be removed from the pipeline system.

Waiting Time: No waiting time between last delivery of the product to the tank and the start of data 

collection.

No waiting time between last dispensing of the product through the pipeline and the 

start of data collection for the test.

Test Period: The minimum data collection time (response time) for the test must be 20 seconds.

Test data must be acquired and recorded by a permanently installed microprocessor.

Calculations are automatically done by the microprocessor.

System Features: This system is permanently installed on the pipeline and automatically tests the line.

Uses a preset threshold and a single test to determine whether the pipeline is 

leaking.

If a leak is declared, this system displays a message, triggers an alarm and shuts 

down the dispensing system.

Calibration: Sensor 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
183

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the method or equipment.

Revision Date: November 22, 1995

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 exceeds this 

threshold). 

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

Specification: System is installed on pressurized fiberglass and steel piping.

The piping system volume must not exceed 45 gallons.

Tests are conducted at the line operating pressure.

The mechanical line leak detector must be removed from the pipeline system.

Waiting Time: No waiting time between last delivery of the product to the tank and the start of data 

collection.

Waiting time between last dispensing of the product through the pipeline and the start 

of data collection for the test must be 2 hours.

Test Period: The minimum data collection time (response time) for the test must be 20 minutes.

Test data must be acquired and recorded by a permanently installed microprocessor.

Calculations are automatically done by the microprocessor.

System Features: This system is permanently installed on the pipeline and automatically tests the line.

Uses a preset threshold and a single test to determine whether the pipeline is 

leaking.

If a leak is declared, this system displays a message, triggers an alarm and shuts 

down the dispensing system.

Calibration: Sensor 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
184

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the method or equipment.

Revision Date: November 22, 1995

Ronan Engineering Co.

X-76 ETM and X-76 ETM-4X

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 exceeds this 

threshold.)

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

specific gravity >0.60 and a viscosity <1500 cp. 

Capacity: The maximum tank capacity is 15,000 gallons.

The tank must be between 50 and 95% full if the system leak threshold is set at 0.1 gph. 

This 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 waiting time between product delivery to the tank and test data collection must 

be 2 hours.

There must be no dispensing or product delivery during the test waiting time.

Test Period: The minimum data collection time must be 4 hours.

Test data must be acquired and recorded by computer.

Leak rate is calculated from data determined to be statistically valid.

There must be no dispensing or product delivery during the test.

Temperature: Minimum of 1 resistance temperature detector must be used to determine the average 

temperature of the stored substance. 

Water Sensor: A water sensor must be used to detect water incursion.

Minimum water level detectable in the tank is 0.947 inches.

Minimum detectable water level change is 0.0254 inches.

Calibration: Temperature sensors and probes must be checked and calibrated in accordance with 

manufacturer's instructions.

Comments: This equipment was not evaluated using manifolded tanks.

This equipment only tests that portion of the tank that contains product.

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

pressure).

Change in product volume is measured using magnetostrictive probe.

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
185

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the method or equipment.

Revision Date: November 22, 1995

Ronan Engineering Co.

X-76 ETM and X-76 ETM-4X

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 exceeds this 

threshold.)

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

specific gravity >0.60 and a viscosity <1500 cp. 

Capacity: The maximum tank capacity is 15,000 gallons.

The tank must be between 50 and 95% full. 

Waiting Time: Minimum waiting time between product delivery to the tank and test data collection must 

be 8 hours.

There must be no dispensing or product delivery during the test waiting time.

Test Period: The minimum data collection time must be 4 hours.

Test data must be acquired and recorded by computer.

Leak rate is calculated from data determined to be statistically valid.

There must be no dispensing or product delivery during the test.

Temperature: Minimum of 1 resistance temperature detector must be used to determine the average 

temperature of the stored substance. 

Water Sensor: A water sensor must be used to detect water incursion.

Minimum water level detectable in the tank is 0.947 inches.

Minimum detectable water level change is 0.0254 inches.

Calibration: Temperature sensors and probes must be checked and calibrated in accordance with 

manufacturer's instructions.

Comments: This equipment was not evaluated using manifolded tanks.

This equipment only tests that portion of the tank that contains product.

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

pressure).

Change in product volume is measured using magnetostrictive probe.

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
186

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the method or equipment.

Revision Date: November 22, 1995

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 exceeds this 

threshold). 

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

Capacity: The maximum tank capacity is 15,000 gallons.

The tank must be 100% full.

Waiting Time: Minimum waiting time between product delivery to the tank and test data collection 

must be 6 hours. 

Minimum waiting time between "topping off" and test data collection must be 1 hour.

There must be no dispensing or product delivery during the test waiting period.

Test Period: The minimum data collection time must be 1 hour.

Test data is 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 product delivery during the test.

Temperature: A minimum of 10 temperature sensors must be used to determine the average 

temperature of the stored product.

Groundwater: Depth to the water table present in the backfill must be determined, and if it is above 

the bottom of the tank, product level must be adjusted to provide 2-4 psi net 

pressure on the bottom of the tank during the test.

Calibration: Temperature and level sensors must be checked annually and calibrated annually. 

Comments: This system was not evaluated using manifolded tanks.

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
187

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the method or equipment.

Revision Date: November 22, 1995

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 exceeds this threshold).

Applicability: Motor vehicle fuels.

Capacity: Maximum tank capacity is 18,000 gallons. 

Data Requirement: Minimum of 30 days of product level and flow through data. 

Comments: All 41 data sets were analyzed with conclusive results.

The median monthly throughput for tanks used in the evaluation was 7,000 gallons.

Leak rates ranging from 0.05 to 0.2 gph were used in evaluation.

Data sets used in this evaluation were supplied by the evaluator.

This evaluation did not include data from manifolded tanks.

Simmons Sirvey Corp. Evaluator: S.S.G. Associates

9550 Forest Lane, Ste. 720 Tel: (601) 234-1179

Dallas, TX 75243-5934

Tel: (800) 848-8378 Date of Evaluation: 12/15/92
188

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the method or equipment.

 Revision Date: November 22, 1995

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 exceeds this threshold).

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

Capacity: Maximum UST capacity shall not exceed 18,000 gallons.

Data Requirement: Minimum of 32 days of product level and flow through data.

Comments: Of the 41 data sets presented for evaluation, only 24 "best" analyses were returned. 

17 data sets were not analyzed.

The median monthly throughput for tanks used in this evaluation was 6,313 gallons.

Leak rates of 0.049 to 0.21 gph were used in the evaluation.

Data sets used in this evaluation were supplied by the evaluator.

This evaluation did not include data from manifolded tanks.

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
189

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the method or equipment.

 Revision Date: November 22, 1995

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 exceeds this threshold).

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

Capacity: Maximum tank capacity is 18,000 gallons. 

Data Requirement: Vendor requires 90 days of product level and flow through data before making the 

first evaluation.

Following the first evaluation, subsequent evaluations are made based on 30 days of 

data.

Comments: Of the 41 data sets presented for evaluation, 5 were inconclusive.

The median monthly throughput of tanks used in the evaluation was 14,600 gallons.

Leak rates of 0.05, 0.1, and 0.2 gph were used in this evaluation.

Data sets used in the evaluation were supplied by the vendor.

This evaluation did not include data from manifolded tanks.

Sir Phoenix, Inc. Evaluator: Nathan Adams, Middle TN State Univ.

P.O. Box 588 Tel: (615) 898-2644

Lawrenceburg, TN 38464

Tel: (615) 762-3300 Date of Evaluation: 11/05/92
190

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the method or equipment.

Revision Date: November 22, 1995

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 exceeds this 

threshold). 

Applicability: Gasoline, diesel.

Capacity: The maximum tank capacity is 15,000 gallons.

The tank must be 100% full.

Waiting Time: Minimum waiting time between product delivery to the tank and test data collection 

must be 10 hours. 

Minimum waiting time between "topping off" and test data collection must be 2 

hours.

There must be no dispensing or product delivery during the test waiting time.

Test Period: The minimum data collection time must be 1.5 hour.

Test data is acquired and recorded manually and by a strip chart recorder.

Leak rate is calculated from data of last 1.5 hours of test period.

There must be no dispensing or product delivery during the test.

Temperature: A minimum of 3 thermistors must be used to determine the average temperature of 

the stored product.

Groundwater: Depth to the water table present in the backfill must be determined, and if it is above 

the bottom of the tank, product level must be adjusted to provide 2-4 psi net 

pressure on the bottom of the tank during the test.

Calibration: Level sensors must be calibrated before each test. 

Temperature sensors must be checked annually and calibrated if necessary.

Comments: This system was not evaluated using manifolded tanks.

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
191

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the method or equipment.

Revision Date: November 22, 1995

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 exceeds this threshold).

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

Capacity: Maximum tank capacity is 12,000 gallons.

Data Requirement: Minimum of 29 days of product level and flow through data are required.

Comments: Of the 120 data sets presented for evaluation, 32 were inconclusive.

The median monthly throughput for tanks evaluated was 8,097 gallons.

A single leak rate of 0.2 gph was used in this evaluation.

Data sets used in this evaluation were supplied by the evaluator.

This evaluation did not include data from manifolded tanks.

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
192

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the method or equipment.

Revision Date: November 22, 1995

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 exceeds this 

threshold). 

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

compatible products.

Capacity: The maximum tank capacity is 15,000 gallons.

The tank must be 100% full.

Waiting Time: Minimum waiting time between product delivery and test data collection must be 

10.5 hours. 

Minimum waiting time between "topping off" and test data collection must be 2.5 

hours.

There must be no dispensing or product delivery during the test waiting time.

Test Period: The minimum data collection time must be 1 hour.

Test data must be acquired and recorded manually for level measurement and by 

computer for temperature measurement.

Leak rate is calculated from1 hour test period.

There must be no dispensing or product delivery during the test.

Temperature: A minimum of 10 thermistors must be used to determine the average temperature of 

the stored product.

Groundwater: Groundwater presence is checked to a depth of 5 feet and test is performed at 

product level of 66 inches above grade to ensure a minimum 1 psi pressure at bottom 

of tank.

Calibration: Temperature and level sensors are checked annually and calibrated if necessary.

Comments: This system was not evaluated using manifolded tanks.

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
193

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the method or equipment.

Revision Date: November 22, 1995

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 exceeds this 

threshold). 

Applicability: Gasoline, diesel, and aviation fuel.

Specification: System tests fiberglass and steel piping.

The piping system volume must not exceed 50 gallons.

Tests are conducted at 150% of the line operating pressure.

Mechanical line leak detector must be removed from the pipeline system being tested.

Waiting Time: Testing may begin immediately after the test equipment is installed in the line. 

Test may not be ended until the pass/fail criteria set by the manufacturer has been met. 

Test Period: The data collection time for the test is 30 minutes to 6 hours.

Pipe deflection, vapor pockets, and large temperature differences may produce 

inconsistent readings, testing to continue until stable conditions are present.

Test data is 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
194

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the method or equipment.

Revision Date: November 22, 1995

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 if any air or water incursion is detected:

Sonic emission of air ingress in the ullage area (above product level);

sonic emission of bubbles by air ingress in product-filled portion of the tank; 

accumulation of water in bottom of tank from water ingress.

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

Capacity: The maximum tank capacity is 75,000 gallons.

The microphone should be located within 60 feet from any possible leak source.

The test is generally conducted at 60-90% product level range. 

The test may be performed at lower product levels (minimum 5% product in the tank) if the total ullage volume 

does not exceed 20,000 gallons.

Test Period: The minimum data collection time to declare a tank tight (after vacuum is reached) is 1 hour if the 

backfill is dry (no water is detected in backfill prior to or at the conclusion of the test). There is no 

specified minimum test time to declare a tank "non-tight".

If water is present in the backfill, the minimum test time for declaring a tank tight is calculated based on 

the tank size, amount of water present in the tank prior to the test, tank tilt, type of water sensor and its 

location.

Manufacturer's time charts should be checked for appropriate test times. 

When the test relies on detection of water ingress, the minimum test time 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 time may be shorter for tanks smaller than 1500 gallons) and 1 hour for the magnetostrictive water 

sensor.

When water is present in the 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 the water measurements are not taken at the low end of the tank, extended test times may be 

required to detect any water ingress.

Water Sensor: A water sensor (at the low point of the tank) is used to detect water ingress. 

Magnetostrictive sensor: minimum detectable water level is 0.017 inches, minimum detectable

water level change is 0.001 inches. 

Printed circuit board sensor: minimum detectable water level is 0.022 inches, minimum detectable 

water level change is 0.016 inch.

Water miscible products limit the effectiveness of water ingress detection. 

Groundwater: Depth to water table present in the backfill must be determined, and if it is above the bottom of the tank, test 

time must be extended to allow sufficient time to detect 0.1 gph incursion of water into the tank. 

Vacuum: The minimum vacuum at the bottom of the tank must be greater -0.5 psi.

Comments: This test method may not be effective in some backfill because some backfill (such as clay) may plug a hole in 

the tank.

This test method was not evaluated using manifolded tanks.

If the soil is saturated with product, this test method may not detect air or water incursion.

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

During the third-party certification, gasoline, diesel, and JP-4 were used. 

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, 1/18/94 

and 10/28/91
195

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the method or equipment.

Revision Date: November 22, 1995

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 exceeds this 

threshold). 

Applicability: Gasoline, diesel, avi ation fuel.

Specification: System is installed on pressurized fiberglass and steel pipelines.

The piping system volume must not exceed 129 gallons.

Tests are conducted at the line operating pressure.

Waiting Time: No waiting time between last delivery of the product to the tank and the start of data 

collection.

No waiting time between last dispensing of the product through the pipeline and the 

start of data collection for the test.

Test Period: The minimum data collection time (response time) for the test is 1 minute.

Test data must be acquired and recorded by a permanently installed microprocessor.

Calculations are automatically done by the microprocessor.

System Features: This system is permanently installed on the pipeline and automatically tests the line.

Uses a preset threshold and a single test to determine whether the pipeline is 

leaking.

If a leak is declared, this system displays a message, triggers an alarm and shuts 

down the dispensing system.

Calibration: Sensor 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
196

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the method or equipment.

Revision Date: November 22, 1995

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 exceeds this 

threshold). 

Applicability: Gasoline, diesel, aviation fuel.

Specification: System is installed on pressurized fiberglass and steel pipelines.

The piping system volume must not exceed 129 gallons.

Tests are conducted at the line operating pressure.

Waiting Time: No waiting time between last delivery of the product to the tank and the start of data 

collection.

No waiting time between last dispensing of the product through the pipeline and the 

start of data collection for the test.

Test Period: The minimum data collection time (response time) for the test is 1.5 hours.

Test data must be acquired and recorded by a permanently installed microprocessor.

Calculations are automatically done by the microprocessor.

System Features: This system is permanently installed on the pipeline and automatically tests the line.

Uses a preset threshold and a single test to determine whether the pipeline is 

leaking.

If a leak is declared, this system displays a message, triggers an alarm and shuts 

down the dispensing system.

Calibration: Sensor 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
197

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the method or equipment.

 Revision Date: November 22, 1995

Tidel Engineering, Inc.

Tidel Environmental Monitoring System, EMS 2000, 3000, and 3500 Series

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: 0.05 gph (a leak is declared if the output of the measurement system exceeds this 

threshold.)

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

Capacity: The maximum tank capacity is 15,000 gallons.

The tank must be between 50 and 95% full. 

Waiting Time: Minimum waiting time between product delivery to the tank and test data collection must 

be 2 hours.

There must be no dispensing or product delivery during the test waiting time.

Test Period: The minimum data collection time must be 6 hours.

Test data is 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 product delivery during the test.

Temperature: A minimum of 5 temperature sensors must be used to determine the average temperature 

of the stored substance. 

Water Sensor: A water sensor is used to detect water incursion.

Minimum water level detectable in the tank is 1.48 inches.

Minimum detectable water level change is 0.035 inches.

Calibration: Temperature sensors and ultrasonic probes must be checked and calibrated in accordance 

with manufacturer's instructions.

Comments: This equipment was not evaluated using manifolded tanks.

This equipment only tests that portion of the tank that contains product.

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

pressure).

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
198

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the method or equipment.

Revision Date: November 22, 1995

Tidel Engineering, Inc.

Tidel Environmental Monitoring System, EMS 2000, 3000, and 3500 Series

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 exceeds this 

threshold.)

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

Capacity: The maximum tank capacity is 15,000 gallons.

The tank must be between 50 and 95% full. 

Waiting Time: Minimum waiting time between product delivery to the tank and test data collection must 

be 2 hours.

There must be no dispensing or product delivery during the test waiting time.

Test Period: The minimum data collection time must be 6 hours.

Test data is 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 product delivery during the test.

Temperature: A minimum of 5 temperature sensors must be used to determine the average temperature 

of the stored substance. 

Water Sensor: A water sensor is used to detect water incursion.

Minimum water level detectable in the tank is 1.48 inches.

Minimum detectable water level change is 0.035 inches.

Calibration: Temperature sensors and ultrasonic probes must be checked and calibrated in accordance 

with manufacturer's instructions.

Comments: This equipment was not evaluated using manifolded tanks.

This equipment only tests that portion of the tank that contains product.

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

pressure).

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
199

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the method or equipment.

Revision Date: November 22, 1995

Tidel Engineering, Inc.

EMS-3500

With Monitoring Well 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: *

commercial 

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, home heating oil #2.

Comments:

The test procedures used were those in 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. 

In addition, the probe was tested to determine its capability of detecting hydrocarbons floating on water. 

A Lower Detection Limit thickness of 0.04 cm was detected on average in 16 minutes 41 seconds, with the 

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
200

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the method or equipment.

 Revision Date: November 22, 1995

Tidel Engineering, Inc.

EMS-3500

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: *

commercial 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), home heating oil #2 (at 2.30 cm).

Comments:

The test procedures used were those in 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.

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
201

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the method or equipment.

Revision Date: November 22, 1995

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:

This point sensor is intended to monitor the level of either ethylene glycol or calcium chloride solutions in the 

interstitial or annular space of a double-walled tank, by triggering an alarm if any significant gain or loss of 

solution occurs.

Evaluation was performed using procedures 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, modified to accommodate the intended purpose.

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
202

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the method or equipment.

Revision Date: November 22, 1995

Tidel Engineering, Inc.

EMS-3500

with Monitoring Well Probes 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:

commercial

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%): commercial gasoline, n-hexane, diesel fuel, jet-A fuel, toluene, JP-4 jet fuel, synthetic 

gasoline, xylene(s).

Comments:

EPA and many states require detection of 1/8 inch of product, which is 0.32 cm.

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
203

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the method or equipment.

Revision Date: November 22, 1995

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:

commercial 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%): commercial gasoline, n-hexane, diesel fuel, jet-A fuel, toluene, JP-4 jet fuel, synthetic 

gasoline, xylene(s).

Comments:

EPA and many states require detection of 1/8 inch of product, which is 0.32 cm.

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
204

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the method or equipment.

Revision Date: November 22, 1995

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:

commercial 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: commercial gasoline, n-hexane, diesel fuel, jet-A fuel, toluene, synthetic gasoline, 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 of product, which is 0.32 cm.

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
205

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the method or equipment.

Revision Date: November 22, 1995

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:

jet fuel commercial synthetic

(JP-4) gasoline gasoline

Accuracy (%) 100 100 100

Detection time (sec) 1 2 2

Fall time (sec) 2 1 2

Lower detection limit (cm) 0.16-0.32 0.16-0.32 0.16-0.32

Specificity Results:

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

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 of product, which is 0.32 cm.

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
206

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the method or equipment.

Revision Date: November 22, 1995

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:

commercial synthetic jet fuel 

gasoline gasoline (JP-4)

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

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 of product, which is 0.32 cm.

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
207

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the method or equipment.

Revision Date: November 22, 1995

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:

commercial synthetic

gasoline gasoline JP-4

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: commercial gasoline, JP-4 jet fuel, synthetic gasoline, toluene, xylene(s)

Not Activated: n-hexane.

Comments:

The test procedures used were those in 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
208

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the method or equipment.

Revision Date: November 22, 1995

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:

commercial synthetic

gasoline gasoline JP-4

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: commercial gasoline, JP-4 jet fuel, synthetic gasoline, n-hexane, 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:

The test procedures used were those in 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
209

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the method or equipment.

Revision Date: November 22, 1995

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 exceeds this 

threshold). 

Applicability: Gasoline, diesel, and alcohols.

Specification: System is installed on pressurized fiberglass and steel piping.

The piping system volume must not exceed 78 gallons.

Tests are conducted at 150% operating pressure.

Waiting Time: There is no waiting period between product delivery and testing.

There is no waiting period between last dispensing and testing.

Test Period: Minimum test time (response time) must be 4 seconds.

System Features: This system is permanently installed on the piping and automatically tests the line.

It uses a preset threshold and a single test to determine whether the piping is leaking.

If a leak is detected, this system restricts flow to the dispenser.

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

manufacturer’s instructions.

Comments: Tokheim Corporation no longer manufactures this system.

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
210

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the method or equipment.

Revision Date: November 22, 1995

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: Detection of tracer chemical.

Applicability: All fluid petroleum products and any other fluid which the tracer is compatible. 

Waiting Time: Waiting period after injection of the tracer into the tank is on average 2 weeks, 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 tracerlabeled fuel through all parts of the system.

Under these circumstances the 1 week waiting period begins after the tracer reaches 

the pipeline being tested.

Tracer Dosage: Dosage of tracer is a factor of tank size and the frequency of tank refills according to 

manufacturer's recommendations. 

Tracer labeled product should be circulated through the piping before the test period 

begins. 

Pressurized piping must be brought up to operating pressure or caused to operate on 

a daily basis.

Permeability: Soil permeability must be greater than 1 Darcy. 

Soil permeability must be sufficient for transport of tracer through the backfill.

Probe: Radius of influence of each probe is 10 feet.

Locating the pipelines should be done according to the manufacturer’s operating 

procedures for pipeline test results to be valid.

Comments: Presence of frozen, saturated soil (frozen groundwater) surrounding the pipeline may 

reduce the effectiveness of this test method.

Presence of groundwater surrounding piping may also reduce the effectiveness of 

This test method (e.g. when applied to tanks containing water-miscible products or 

products whose specific gravity is greater than one).

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
211

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the method or equipment.

Revision Date: November 22, 1995

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: Detection of tracer chemical.

Applicability: All fluid petroleum products and any other fluid which the tracer is compatible.

Capacity: This test method is not limited by tank capacity, however only portions of the tank 

system within 10 feet of sample collection point are tested. 

Waiting Time: Waiting period after injection of the tracer into the tank is 7 to 30 days (generally two 

weeks).

Tracer Dosage: Dosage of tracer is a factor of tank size and the frequency of tank refills according to

manufacturer's recommendations. 

Permeability: Soil permeability must be greater than 1 Darcy. 

Soil permeability must be sufficient for transport of tracer through the backfill.

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 the water table present in the backfill must be determined. In order for a 

leak below the water table to be indicated by the release of the tracer compound, the 

hydrostatic pressure of product in the tank must exceed the hydrostatic pressure of 

the water table.

This is done by maintaining the product level at least 6 inches over the water table for 

a minimum of 17 hours during the first three days following the addition of the tracer 

compound to the tank system.

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 the effectiveness of 

this test method.

Presence of groundwater above the bottom of the tank may also limit the 

effectiveness of this test method (e.g. when applied to tanks containing watermiscible products or products whose specific gravity is greater than one).

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.

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
212

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the method or equipment.

Revision Date: November 22, 1995

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 results based on 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." 

The 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 the evaluations, the tracer chemical was declared 159 out of 161 trials. 

The system evaluation included detectors, analytical procedures, sample containers, sampling procedures, 

sampling equipment, 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
213

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the method or equipment.

Revision Date: November 22, 1995

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 exceeds this 

threshold). 

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

Specification: System tests fiberglass and/or steel piping.

The piping system volume must not exceed 80 gallons.

Tests are conducted at 150% of the line operating pressure.

Waiting Time: There is no minimum waiting time between delivery of product and the start of data 

collection. 

Minimum waiting time between last dispensing of product through the pipeline system 

and the start of data collection must be at least 15 minutes.

Temperature: Product temperature change per hour should be less than 4 degrees F.

Test Period: The minimum data collection time must be 15 minutes.

Test data is acquired and recorded manually.

Manual calculations are performed by the operator on site.

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
214

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the method or equipment.

Revision Date: November 22, 1995

Triangle Environmental, Inc.

TEI Ullage Test, Version 1.00

NON-VOLUMETRIC TANK TIGHTNESS TEST METHOD (ULLAGE)

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

Leak Threshold: An increase in the acoustic noise level of the tank under vacuum is detected due to 

air or water ingress indicates a leak. 

Applicability: Gasoline, diesel, avi ation fuel, fuel oil #4, solvents, and light liquids.

Capacity: The maximum ullage volume is 15,000 gallons.

The microphone should be located within 24 feet of all points of the ullage portion of 

the tank.

Waiting Time: There is no waiting time if the test is conducted after the underfilled tank test.

Test Period: The data collection time is 1 minute.

Test Pressure: Vacuum of 1 psi is maintained in the ullage portion of the tank.

If the vacuum cannot be maintained, see manufacturer’s instructions.

Temperature: Acoustic signal is independent of product temperature.

Groundwater: Depth to groundwater table present in the backfill must be determined, and if it is 

above the product level, vacuum pressure must be adequate to detect an ingress of 

water.

Comments: This test method was third-party certified using unleaded gasoline as the test 

product.

Manifolded tanks are identified and isolated prior to the test.

During the third-party testing, the microphone was 24 feet away from the leak 

source.

Headphones are used during the test to listen for the signal of air ingress.

Noise signals are tape recorded.

Test method may not be effective in some backfill because some particles (such as 

clay) may plug a hole in the tank.

If the soil is saturated with product, this test will not detect air or water ingress. 

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
215

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the method or equipment.

 Revision Date: November 22, 1995

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 if the acoustic noise level of the tank under vacuum is greater 

than the calibrated noise level (which is taken without vacuum). 

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

Capacity: The maximum tank capacity is 20,000 gallons.

The tank must be at least 14% full.

The microphone should be located within 24 feet of all points on the tank.

Waiting Time: There is no waiting time after product delivery to the tank.

Test Period: The data collection time is 1 minute.

Test Pressure: Vacuum of 1 psi is maintained at the bottom of the tank.

If the vacuum cannot be maintained, see manufacturer’s instructions.

Temperature: Acoustic signal is independent of product temperature.

Groundwater: Depth of the groundwater table in the backfill must be determined.

This method cannot be used if the groundwater is above the bottom of the tank.

Comments: This test method was third-party certified using unleaded gasoline as the test 

product.

During the third-party testing, the microphone was 24 feet away from the leak 

source.

Headphones are used during the test to listen for the signal of air ingress.

Noise signals are tape recorded (not digitally recorded).

Manifolded tanks are identified and isolated prior to the test.

This test method cannot be used if the backfill is not porous.

This test method may not be effective in some backfill because some particles (such 

as clay) may plug a hole in the tank.

If the soil is saturated with product, this test will not detect air or water ingress.

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
216

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the method or equipment.

Revision Date: November 22, 1995

Triangle Environmental, Inc.

TEI System 4000, Version 1.00 

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 exceeds this 

threshold). 

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

Capacity: The maximum tank capacity is 15,000 gallons.

Tank must be between 50 and 100% full.

Waiting Time: Minimum waiting time between product delivery to the tank and test data collection 

must be 6 hours.

There must be no dispensing or product delivery during the test waiting time.

Test Period: The minimum data collection time is determined by computer. 

The average data collection time during the evaluation was four hours.

Leak rate is calculated from data of last 2 hours of test period.

Test data is acquired and recorded by computer.

There must be no dispensing or product delivery during the test.

Temperature: A minimum of 3 thermistors must be used to determine the average temperature of the 

stored product.

Groundwater: Depth to the water table present in the backfill must be determined, and if it is above 

the bottom of the tank, product level must be adjusted to provide a net pressure of at 

least 1 psi on the bottom of the tank.

Calibration: Sensors must be calibrated before each test.

Comments: This equipment was not evaluated using manifolded tanks.

This system tests only the portion of the tank containing product.

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

head pressure).

T.E.I. System 4000 may also be used as an overfilled 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
217

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the method or equipment.

Revision Date: November 22, 1995

Universal Sensors and Devices, Inc.

TICS-1000

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 exceeds this 

threshold.)

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

Capacity: The maximum tank capacity is 15,000 gallons.

The tank must be 90% full. 

Waiting Time: Minimum waiting time between product delivery to the tank and test data collection must 

be 8 hours.

There is no minimal waiting time after dispensing

There must be no product delivery during the test waiting time.

Test Period: The minimum data collection time must be 6 hours.

Test data is acquired and recorded by a microprocessor.

Leak rate is calculated from average of subsets of all collected data.

There must be no dispensing or product delivery during the test.

Temperature: A minimum of 5 resistance temperature detectors must be used to determine the average 

temperature of the stored substance. 

Water Sensor: A water sensor must be used to detect water incursion.

Minimum water level detectable in the tank is 0.83 inches.

Minimum detectable water level change is 0.0116 inches.

Calibration: Temperature sensors and probes must be checked and calibrated in accordance with 

manufacturer's instructions.

Comments: This equipment was not evaluated using manifolded tanks.

This equipment only tests that portion of the tank that contains product.

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

pressure).

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
218

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the method or equipment.

 Revision Date: November 22, 1995

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: *

commercial

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, home heating oil #2, water.

Comments:

EPA and many states require detection of 1/8 inch of product, which is 0.32 cm.

The test procedures used were those in 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.

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
219

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the method or equipment.

Revision Date: November 22, 1995

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:

commercial synthetic

gasoline gasoline JP-4

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: commercial gasoline, synthetic gasoline, JP-4 jet fuel, n-hexane, toluene, xylene(s).

Comments:

The test procedures used were those in 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
220

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the method or equipment.

Revision Date: July 19, 1996

USTest

UST 2001

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 exceeds this 

threshold). 

Applicability: Gasoline, diesel, and aviation fuel. 

Other liquids may be tested after consultation with the manufacturer.

Capacity: The maximum tank capacity is 15,000 gallons.

The tank must be between 50 and 95% full.

Waiting Time: Minimum waiting time between product delivery to the tank and test data collection must 

be 4 hours.

There must be no product delivery during the test waiting time.

There is a 15 minute minimum waiting time after dispensing.

Test Period: The minimum data collection time must be 1 hour. (See Comments section below.)

Test data must be 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 product delivery during the test.

Temperature: A change in temperature is determined via a measurement of the change in the speed of 

sound. 

Water Sensor: A water sensor must be used to detect water incursion.

Water is detected via an ultrasonic signal ranging to the water interface.

Minimum water level detectable in the tank is less than 0.1 inches.

Minimum change in water level that can be detected is 0.046 inches.

Calibration: The probe must be checked regularly in accordance with manufacturer's instructions.

Comments: This equipment was not evaluated using manifolded tanks.

This equipment only tests the portion of the tank that contains product.

As the product level is lowered the leak rate in a leaking tank decreases (due to 

lower head pressure).

With a test data collection time of 2 hours, this method has a PD of 98.6% and a PFA of 

1.4%.

USTest Evaluator: Ken Wilcox Associates

P.O. Box 53835 Tel: (816) 443-2494

Lafayette, LA 70505

Tel: (318) 981-9421 Date of Evaluation: 06/06/95
221

Appearance on this list is 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: July 19, 1996

USTest

UST 2001 (Quick Test)

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 exceeds this 

threshold). 

Applicability: Gasoline, diesel, and aviation fuel. 

Other liquids may be tested after consultation with the manufacturer.

Capacity: The maximum tank capacity is 15,000 gallons.

The tank must be between 50 and 95% full.

Waiting Time: Minimum waiting time between product delivery to the tank and test data collection must

be 4 hours.

There must be no product delivery during the test waiting time.

There is a 15 minute minimum waiting time after dispensing.

Test Period: The minimum data collection time must be 0.5 hour. (See Comments section below.)

Test data must be 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 product delivery during the test.

Temperature: A change in temperature is determined via a measurement of the change in the speed of 

sound. 

Water Sensor: A water sensor must be used to detect water incursion.

Water is detected via an ultrasonic signal ranging to the water interface.

Minimum water level detectable in the tank is less than 0.1 inches.

Minimum change in water level that can be detected is 0.046 inches.

Calibration: The probe must be checked regularly in accordance with manufacturer's instructions.

Comments: This equipment was not evaluated using manifolded tanks.

This equipment only tests the portion of the tank that contains product.

As the product level is lowered the leak rate in a leaking tank decreases (due to 

lower head pressure).

With a test data collection time of 1 hour, this method has a PD of 99.9% and a PFA of 

0.1%.

USTest Evaluator: Ken Wilcox Associates

P.O. Box 53835 Tel: (816) 443-2494

Lafayette, LA 70505

Tel: (318) 981-9421 Date of Evaluation: 06/06/95
222

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the method or equipment.

 Revision Date: November 22, 1995

USTest

UST 2000/U (2.0 psi and –1.0psi)

NON-VOLUMETRIC TANK TIGHTNESS TEST METHOD (ULLAGE)

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

Leak Threshold: A substantial increase in the noise signal (under vacuum or pressure) over the 

background signal (no pressurization or vacuum applied) in the frequency interval of 

10 kHz to 20 kHz, us declared as a leak.

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

Equipment is not in contact with the product.

Capacity: Ullage volume of 7,550 gallons or less for +2.0 psig and 5,250 gallons or less for 

–1.0 psig test.

Waiting Time: There is no waiting time if the test is conducted after an underfilled tank tightness 

test.

Test Period: Minimum data collection time (includes collection of background information) is 15 

minutes.

Test Pressure: Tests are done at a net of +2.0 psi (pressure) or -1.0 psi (vacuum) in the ullage 

portion of the tank.

Groundwater: Depth to the groundwater table present in the backfill must be determined.

If it is above the product level, the test under vacuum must not be conducted.

Net outward pressure throughout the ullage must exceed 2.0 psi.

Calibration: Test equipment is checked by the tester before each test.

Comments: This is an ullage test only; the portion of the tank that contains product must be 

tested with an underfilled test method.

During the third-party certification, unleaded gasoline was the test product.

During the third-party certification, the microphone was less than 8.5 feet from the 

leak source.

Surrounding acoustical noise can interfere with the test result.

If the background noise is above a certain threshold, the test is inconclusive.

Vibration due to nearby equipment or dripping condensation can interfere with this 

test.

This equipment is not third-party certified using manifolded tanks.

USTest Evaluator: Ken Wilcox Associates

P.O. Box 53835 Tel: (816) 443-2494

Lafayette, LA 70505

Tel: (318) 981-9421 Date of Evaluation: 03/24/92
223

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the method or equipment.

 Revision Date: November 22, 1995

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 exceeds this 

threshold). 

Applicability: Gasoline, diesel, and aviation fuel. Water, kerosene, and other liquids may be tested 

in consultation with the manufacturer. 

Capacity: The maximum tank capacity is 15,000 gallons.

The tank must be at least 15% full.

There must be at least 20 inches and not more than 67 inches of product in the 

tank.

Waiting Time: Minimum waiting period between delivery and test data collection is usually between 

3 to 12 hours. 

Testing may begin when the rate of product temperature change does not 

exceed 0.1 degrees F per hour.

There must be no dispensing or product delivery during the test waiting time.

Test Period: The minimum data collection time must be 2 hours.

Test data is 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 product delivery during the test.

Temperature: Change in temperature is determined via a measurement of the change in the speed 

of sound.

Groundwater: Depth to the water table present in the backfill must be determined, and if it is above 

the bottom of the tank, product level must be adjusted to provide a net pressure of 

at least +/-1.0psi on the bottom of the tank.

Calibration: The temperature sensors and probes must be checked annually and calibrated if 

necessary in accordance with manufacturer’s instructions.

Comments: This equipment was not evaluated using manifolded tanks.

This system tests only the portion of the tank containing product.

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

lower head pressure).

USTest Evaluator: Ken Wilcox Associates

P.O. Box 53835 Tel: (816) 443-2494

Lafayette, LA 70505

Tel: (318) 981-9421 Date of Evaluation: 06/09/94
224

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the method or equipment.

Revision Date: November 22, 1995

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, and

leak rate of 0.1 gph with PD=99.7% and PFA=0.3% for tanks up to 45,000 gallons.

Leak Threshold: 0.05 gph (a leak is declared if the output of the measurement system exceeds this 

threshold). 

Applicability: Gasoline, diesel, and aviation fuel. Water, kerosene, and other liquids may be tested in 

consultation with the manufacturer. 

Capacity: The maximum tank capacity is 45,000 gallons.

The tank must be at least 78.6% full.

Waiting Time: Minimum waiting period for tanks up to 45,000 gallons must be determined from the 

manufacturer's chart of Wait Time versus Tank Volume, and this chart must be 

included in the tank test report.

There must be no dispensing or product delivery during the test waiting time.

Test Period: The minimum data collection time for tanks between 10,000 and 45,000 gallons is 

determined from the manufacturer's chart of Differential Volume versus Test Duration. 

The line labeled PD = 99.9% must be used. This chart must be included in the tank test 

report.

Test data is acquired and recorded by a computer, which does a regression analysis to 

determine the leak rate.

There must be no dispensing or product delivery during the test.

Temperature: Change in temperature is determined via a measurement of the change in the speed of 

sound.

Groundwater: Depth to the water table present in the backfill must be determined, and if it is above 

the bottom of the tank, product level must be adjusted to provide a net pressure of at 

least 1.0 psi on the bottom of the tank.

Comments: This equipment was not evaluated using manifolded tanks.

This system tests only the portion of the tank containing product.

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

lower head pressure).

USTest Evaluators: Midwest Research Institute

P.O. Box 53835 Tel: (816) 753-7600

Lafayette, LA 70505 and Ken Wilcox Associates 

Tel: (318) 981-9421 Tel: (816) 443-2494

Dates of Evaluation: 12/05/90 (1000-10000 gallons),

and 08/04/92 (10000-45000 gallons)
225

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the method or equipment.

Revision Date: November 22, 1995

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 exceeding the threshold at the 

5% level of significance is detected).

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

Capacity: Maximum tank capacity is 18,000 gallons. 

Data Requirement: Minimum of 42 days of product level and flow through data is required.

Comments: Of the 41 data sets submitted for analysis, four data sets were not analyzed, 7 were 

inconclusive.

This evaluation did not include data sets from manifolded tanks.

The median monthly throughput for tanks used in this evaluation was 10,978 gallons.

Leak rates ranging from 0.048 to 0.201 gph were used in the evaluation.

Data sets used in this evaluation were supplied by the 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
226

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the method or equipment.

Revision Date: November 22, 1995

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 exceeds this threshold).

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

Capacity: Maximum tank capacity of 30,000 gallons.

Data Requirement: Minimum of 30 days of product level and flow through data.

Comments: All 53 data sets presented for evaluation were evaluated with conclusive results.

The median monthly throughput of tanks used in this evaluation was 25,408 gallons.

Leak rates of 0.05, 0.1, and 0.2 gph were used in the evaluation.

Data sets used in this evaluation were supplied by the evaluator and some data sets 

used an USTMAN SIR 1.91 (0.1 gph) analysis as documentation that tanks in this 

evaluation were tight.

This evaluation included some data from manifolded tanks.

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
227

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the method or equipment.

Revision Date: November 22, 1995

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 exceeding the threshold that is 

statistically significant from zero at the 5% confidence level is detected).

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

Capacity: Maximum tank capacity is 15,000 gallons. 

Data Requirement: Minimum of 35 days of product level and flow through data.

Comments: Of the 120 data sets evaluated by the method, 15 were inconclusive.

This evaluation did not include data sets from manifolded tanks.

The median monthly throughput for tanks used in this evaluation was 15,867 gallons.

Data sets used in this evaluation were supplied by the 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
228

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the method or equipment.

Revision Date: November 22, 1995

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 exceeds this 

threshold). 

Applicability: Gasoline, diesel, aviation fuel and solvent.

Specification: System is installed on pressurized fiberglass or steel piping.

The piping system volume must not exceed 129 gallons.

Tests are conducted at the line operating pressure.

Waiting Time: There is no waiting period between last dispensing and testing.

There is no waiting period between product delivery and testing.

Test Period: The minimum test time (response time) is 5 seconds.

System Features: This system is permanently installed on the piping and automatically tests the line.

It uses a preset threshold and a single test to determine whether the piping is 

leaking.

If a leak is detected, the LD 2000 will restrict fuel flow to dispenser, and the LD 

2000S shuts off the pump.

Calibration: Equipment 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
229

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the method or equipment.

Revision Date: November 22, 1995

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 exceeds this 

threshold). 

Applicability: Gasoline, diesel, aviation fuel and solvent.

Specification: System is installed on flexible piping.

The piping system volume must not exceed 59.6 gallons.

Tests are conducted at the line operating pressure.

Waiting Time: There is no waiting period between last dispensing and testing.

There is no waiting period between product delivery and testing.

Test Period: The minimum test time (response time) is 30 seconds.

System Features: This system is permanently installed on the piping and automatically tests the line.

It uses a preset threshold and a single test to determine whether the piping is 

leaking.

If a leak is detected, the LD 2000E will restrict fuel flow to dispenser, and the LD 

2000E-S shuts off the pump.

Calibration: Equipment 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 the third-party 

evaluation.

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
230

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the method or equipment.

Revision Date: November 22, 1995

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 exceeds this 

threshold). 

Applicability: Gasoline, diesel, aviation fuel and solvent.

Specification: System is installed on pressurized fiberglass or steel piping.

The piping system volume must not exceed 129 gallons.

Tests are conducted at the line operating pressure.

Waiting Time: There is no waiting period between last dispensing and testing.

There is no waiting period between product delivery and testing.

Test Period: The minimum test time (response time) is 1 minute.

System Features: This system is permanently installed on the piping and automatically tests the line. 

“T” stands for shortened check valve to fit the Tokiem pump.

It uses a preset threshold and a single test to determine whether the piping is 

leaking.

If a leak is detected, the LD 2000T will restrict fuel flow to dispenser, and the LD 

2000T-S shuts off the pump.

Calibration: Equipment 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
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: November 22, 1995

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 exceeds this 

threshold). 

Applicability: Gasoline, diesel, aviation fuel and solvent.

Specification: System is installed on pressurized steel and fiberglass piping.

The piping system volume must not exceed 320 gallons.

Tests are conducted at the line operating pressure.

Waiting Time: There is no waiting period between last dispensing and testing.

Test Period: The minimum test time (response time) is 9 seconds.

System Features: This system is permanently installed on the piping and automatically tests the line 

when the pump is activated.

If a leak is detected, the LD 3000 will restrict fuel flow to dispenser, and the LD 

3000S shuts off the pump.

Calibration: Equipment 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
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: November 22, 1995

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: 2.4 gph (a leak is declared if the output of the measurement system exceeds this 

threshold). 

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

Specification: System is installed on pressurized fiberglass and steel piping.

The piping system volume must not exceed 41 gallons.

Tests are conducted at the line operating pressure.

The mechanical line leak detector must be removed from the pipeline system. 

Waiting Time: There is no waiting period between product delivery and testing.

Minimum waiting period between last dispensing and testing depends on volume of 

product and temperature gradient which is determined by the system’s computer.

Test Period: The minimum data collection time (response time) is 13.9 seconds.

Test data must be acquired and recorded by a microprocessor.

Calculations are automatically done by the microprocessor.

System Features: This system is permanently installed on the pipeline and automatically tests the line.

Uses a preset threshold and a single test to determine whether the pipeline is 

leaking.

If a leak is declared, this system displays a message, and triggers an alarm.

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

manufacturer’s instructions.

Comments: Please note that the following specification sheet is a separate evaluation for this 

same system at the same leak rate.

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: 09/20/91
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: November 22, 1995

Veeder-Root

TLS-350 Line Leak Detector, Series 8475

AUTOMATIC ELECTRONIC LINE LEAK DETECTOR

Certification: Leak rate of 3.0 gph with PD=100.0% and PFA=0%. 

Leak Threshold: 1.5 gph (a leak is declared if the output of the measurement system exceeds this 

threshold). 

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

Specification: System is installed on pressurized fiberglass and steel piping.

The piping system volume must not exceed 128 gallons.

Tests are conducted at the line operating pressure.

The mechanical line leak detector must be removed from the pipeline system. 

Waiting Time: There is no waiting period between product delivery and testing.

Minimum waiting period between last dispensing and testing depends on volume of 

product and temperature gradient which is determined by the system’s computer.

Test Period: The minimum data collection time (response time) is 14 seconds.

Test data must be acquired and recorded by a microprocessor.

Calculations are automatically done by the microprocessor.

System Features: This system is permanently installed on the pipeline and automatically tests the line.

Uses a preset threshold and a single test to determine whether the pipeline is 

leaking.

If a leak is declared, this system displays a message, and triggers an alarm.

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

manufacturer’s instructions.

Comments: Please note that the previous specification sheet is a separate evaluation for this 

same system at the same leak rate.

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: 04/12/93
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: November 22, 1995

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 exceeds this 

threshold). 

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

Specification: System is installed on pressurized fiberglass and steel piping.

The piping system volume must not exceed 41 gallons.

Tests are conducted at the line operating pressure.

The mechanical line leak detector must be removed from the pipeline system. 

Waiting Time: There is no waiting period between product delivery and testing.

Minimum waiting period between last dispensing and testing depends on volume of 

product and temperature gradient which is determined by the system’s computer.

Test Period: Minimum data collection time (response time) is 6 seconds.

Test data must be acquired and recorded by a microprocessor.

Calculations are automatically done by the microprocessor.

System Features: This system is permanently installed on the pipeline and automatically tests the line.

Uses a preset threshold and a single test to determine whether the pipeline is 

leaking.

If a leak is declared, this system displays a message, triggers an alarm, and shuts 

down the dispensing system.

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

manufacturer’s instructions.

Comments: Please note that the following specification sheet is a separate evaluation for this 

same system at the same leak rate.

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: 09/20/91
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: November 22, 1995

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 exceeds this 

threshold). 

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

Specification: System is installed on pressurized fiberglass and steel piping.

The piping system volume must not exceed 128 gallons.

Tests are conducted at the line operating pressure.

The mechanical line leak detector must be removed from the pipeline system. 

Waiting Time: There is no waiting period between product delivery and testing.

Minimum waiting period between last dispensing and testing depends on volume of 

product and temperature gradient which is determined by the system’s computer.

Test Period: Minimum data collection time (response time) is 6 seconds.

Test data must be acquired and recorded by a microprocessor.

Calculations are automatically done by the microprocessor.

System Features: This system is permanently installed on the pipeline and automatically tests the line.

Uses a preset threshold and a single test to determine whether the pipeline is 

leaking.

If a leak is declared, this system displays a message, triggers an alarm, and shuts 

down the dispensing system.

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

manufacturer’s instructions.

Comments: Please note that the previous specification sheet is a separate evaluation for this 

same system at the same leak rate.

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: 04/12/93
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: November 22, 1995

Veeder-Root

TLS-350 Line Leak Detector, Series 8475

AUTOMATIC ELECTRONIC LINE LEAK DETECTOR

Certification: Leak rate of 0.1 gph with PD=100.0% and PFA=0%. 

Leak Threshold: 0.04 gph (a leak is declared if the output of the measurement system exceeds this 

threshold). 

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

Specification: System is installed on pressurized fiberglass and steel piping.

The piping system volume must not exceed 41 gallons.

Tests are conducted at the line operating pressure.

The mechanical line leak detector must be removed from the pipeline system. 

Waiting Time: There is no waiting period between product delivery and testing.

Minimum waiting period between last dispensing and testing depends on volume of 

product and temperature gradient which is determined by the system’s computer.

Test Period: Minimum data collection time (response time) is 14 minutes.

Test data must be acquired and recorded by a microprocessor.

Calculations are automatically done by the microprocessor.

System Features: This system is permanently installed on the pipeline and automatically tests the line.

Uses a preset threshold and a single test to determine whether the pipeline is 

leaking.

If a leak is declared, this system displays a message, triggers an alarm, and shuts 

down the dispensing system.

Calibra tion: Equipment must be checked annually and calibrated if necessary in accordance with 

manufacturer’s instructions.

Comments: Please note that the following specification sheet is a separate evaluation for this 

same system at the same leak rate.

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: 09/20/91
237

Appearance on this list is 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: November 22, 1995

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 exceeds this 

threshold). 

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

Specification: System is installed on pressurized fiberglass and steel piping.

The piping system volume must not exceed 128 gallons.

Tests are conducted at the line operating pressure.

The mechanical line leak detector must be removed from the pipeline system. 

Waiting Time: There is no waiting period between product delivery and testing.

Minimum waiting period between last dispensing and testing depends on volume of 

product and temperature gradient which is determined by the system’s computer.

Test Period: Minimum data collection time (response time) is 14 minutes.

Test data must be acquired and recorded by a microprocessor.

Calculations are automatically done by the microprocessor.

System Features: This system is permanently installed on the pipeline and automatically tests the line.

Uses a preset threshold and a single test to determine whether the pipeline is 

leaking.

If a leak is declared, this system displays a message, triggers an alarm, and shuts 

down the dispensing system.

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

manufacturer’s instructions.

Comments: Please note that the previous specification sheet is a separate evaluation for this 

same system at the same leak rate.

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
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: November 22, 1995

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 exceeds this 

threshold). 

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

Specification: System is installed on pressurized flexible piping.

The piping system volume must not exceed 158.4 gallons.

Tests are conducted at the line operating pressure.

The mechanical line leak detector must be removed from the pipeline system. 

Waiting Time: There is no waiting period between product delivery and testing.

Minimum waiting period between last dispensing and testing depends on volume of 

product and temperature gradient which is determined by the system’s computer.

Test Period: Minimum data collection time (response time) is 1 minute.

Test data must be acquired and recorded by a microprocessor.

Calculations are automatically done by the microprocessor.

System Features: This system is permanently installed on the pipeline and automatically tests the line.

Uses a preset threshold and a single test to determine whether the pipeline is 

leaking.

If a leak is declared, this system displays a message, and triggers an alarm.

Calibration: Equipment 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
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: November 22, 1995

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 exceeds this 

threshold). 

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

Specification: System is installed on pressurized flexible piping.

The piping system volume must not exceed 158.4 gallons.

Tests are conducted at the line operating pressure.

The mechanical line leak detector must be removed from the pipeline system. 

Waiting Time: There is no waiting period between product delivery and testing.

Minimum waiting period between last dispensing and testing depends on volume of 

product and temperature gradient which is determined by the system’s computer.

Test Period: Minimum data collection time (response time) is 0.75 to 8.85 hours.

Test data must be acquired and recorded by a microprocessor.

Calculations are automatically done by the microprocessor.

System Features: This system is permanently installed on the pipeline and automatically tests the line.

Uses a preset threshold and a single test to determine whether the pipeline is 

leaking.

If a leak is declared, this system displays a message, triggers an alarm, and shuts 

down the dispensing system.

Calibration: Equipment 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
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: November 22, 1995

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 exceeds this 

threshold). 

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

Specification: System is installed on pressurized flexible piping.

The piping system volume must not exceed 158.4 gallons.

Tests are conducted at the line operating pressure.

The mechanical line leak detector must be removed from the pipeline system. 

Waiting Time: There is no waiting period between product delivery and testing.

Minimum waiting period between last dispensing and testing depends on volume of 

product and temperature gradient which is determined by the system’s computer.

Test Period: Minimum data collection time (response time) is 1.2 to 12.9 hours.

Test data must be acquired and recorded by a microprocessor.

Calculations are automatically done by the microprocessor.

System Features: This system is permanently installed on the pipeline and automatically tests the line.

Uses a preset threshold and a single test to determine whether the pipeline is 

leaking.

If a leak is declared, this system displays a message, triggers an alarm, and shuts 

down the dispensing system.

Calibration: Equipment 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
241

Appearance on this list is 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: November 22, 1995

Veeder-Root

TLS Line Leak Detector, Series 8484

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 exceeds this 

threshold). 

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

Specification: System is installed on pressurized fiberglass and steel piping.

The piping system volume must not exceed 89 gallons.

Tests are conducted at the line operating pressure.

The mechanical line leak detector must be removed from the pipeline system. 

Waiting Time: There is no waiting period between product delivery and testing.

Minimum waiting period between last dispensing and testing is 16 minutes.

Test Period: Minimum data collection time (response time) is 28.8 seconds.

Test data must be acquired and recorded by a microprocessor.

Calculations are automatically done by the microprocessor.

System Features: This system is permanently installed on the pipeline and automatically tests the line.

Uses a preset threshold and a single test to determine whether the pipeline is 

leaking.

If a leak is declared, this system displays a message, triggers an alarm, and shuts 

down the dispensing system.

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: 08/07/91
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: November 22, 1995

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 exceeds this 

threshold). 

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

Specification: System is installed on pressurized fiberglass and steel piping.

The piping system volume must not exceed 89 gallons.

Tests are conducted at the line operating pressure.

The mechanical line leak detector must be removed from the pipeline system. 

Waiting Time: There is no waiting period between product delivery and testing.

Minimum waiting period between last dispensing and testing is 2.5 hours.

Test Period: Minimum data collection time (response time) is 0.3 hours.

Test data must be acquired and recorded by a microprocessor.

Calculations are automatically done by the microprocessor.

System Features: This system is permanently installed on the pipeline and automatically tests the line.

Uses a preset threshold and a single test to determine whether the pipeline is 

leaking.

If a leak is declared, this system displays a message, triggers an alarm, and shuts 

down the dispensing system.

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: 08/07/91
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: November 22, 1995

Veeder-Root

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

with 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 exceeds this 

threshold). 

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

Capacity: The maximum tank capacity is 15,000 gallons.

The tank must be between 50 and 95% full.

Waiting Time: Minimum waiting time between product delivery to the tank and test data collection must 

be 8.3 hours.

There must be no dispensing or product delivery during the test waiting time.

Test Period: The minimum data collection time must be 5 hours.

Test data must be 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 product delivery during the test.

Temperature: A temperature-averaging probe must be used to determine the average temperature of the 

stored hazardous substance. 

Water Sensor: A water sensor must be used to detect water incursion.

Minimum water level detectable in the tank is 1.40 inches.

Minimum change in water level that can be detected is 0.040 inches.

Calibration: Temperature sensors and probe must be checked and calibrated in accordance with 

manufacturer's instructions.

Comments: This equipment was not evaluated using manifolded tanks.

This equipment only tests the portion of the tank that contains product.

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

pressure).

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
244

Appearance on this list is 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: November 22, 1995

Veeder-Root

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

with 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 exceeds this 

threshold).

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

Capacity: The maximum tank capacity is 15,000 gallons.

The tank must be between 50 and 95% full.

Waiting Time: Minimum waiting time between product delivery to the tank and test data collection must 

be 8.3 hours.

There must be no dispensing or product delivery during the test waiting time.

Test Period: The minimum data collection time must be 2 hours.

Test data must be 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 product delivery during the test.

Temperature: A minimum of 5 thermistors must be used to determine the average temperature of the 

stored hazardous substance. 

Water Sensor: A water sensor must be used to detect water incursion.

Minimum water level detectable in the tank is 1.52 inches.

Minimum change in water level that can be detected is 0.027 inches.

Calibration: Temperature sensors and probe must be checked and calibrated in accordance with 

manufacturer's instructions.

Comments: This equipment was not evaluated using manifolded tanks.

This equipment only tests the portion of the tank that contains product.

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

pressure).

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
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: November 22, 1995

Veeder-Root

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

with 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 exceeds this 

threshold). 

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

Capacity: The maximum tank capacity is 15,000 gallons.

The tank must be between 95% full.

Waiting Time: Minimum waiting time between product delivery to the tank and test data collection must 

be 8.25 hours.

Minimum waiting time after dispensing is 30 minutes.

There must be no product delivery during the test waiting time.

Test Period: The minimum data collection time must be 2 hours.

Test data must be 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 product delivery during the test.

Temperature: A minimum of 5 thermistors must be used to determine the average temperature of the 

stored product. 

Water Sensor: A water sensor must be used to detect water incursion.

Minimum water level detectable in the tank is 1.52 inches.

Minimum change in water level that can be detected is 0.027 inches.

Calibration: Temperature sensors and probe must be checked and calibrated in accordance with 

manufacturer's instructions.

Comments: This equipment was not evaluated using manifolded tanks.

This equipment only tests the portion of the tank that contains product.

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

pressure).

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
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: November 22, 1995

Veeder-Root

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

with 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 exceeds this 

threshold). 

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

Capacity: The maximum tank capacity is 15,000 gallons.

The tank must be between 50 and 95% full.

Waiting Time: Minimum waiting time between product delivery to the tank and test data collection must 

be 8.3 hours.

There must be no product delivery during the test waiting time.

Test Period: The minimum data collection time must be 2 hours.

Test data must be 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 product delivery during the test.

Temperature: A minimum of 5 thermistors must be used to determine the average temperature of the 

stored product. 

Water Sensor: A water sensor must be used to detect water incursion.

Minimum water level detectable in the tank is 0.544 inches.

Minimum change in water level that can be detected is 0.027 inches.

Calibration: Temperature sensors and probe must be checked and calibrated in accordance with 

manufacturer's instructions.

Comments: This equipment was not evaluated using manifolded tanks.

This equipment only tests the portion of the tank that contains product.

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

pressure).

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
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.

Revision Date: November 22, 1995

Veeder-Root

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

with 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 exceeds this 

threshold). 

Applicability: Gasoline, diesel, aviation fuel, solvents, and waste oil. Other liquids may be tested after 

consultation with the manufacturer. 

Capacity: The maximum tank capacity is 15,000 gallons.

The tank must be 95% full.

Waiting Time: Minimum waiting time between product delivery to the tank and test data collection must 

be 8.25 hours.

Minimum waiting time after dispensing is 30 minutes.

There must be no dispensing or product delivery during the test waiting time.

Test Period: The minimum data collection time must be 3 hours.

Test data must be 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 product delivery during the test.

Temperature: A minimum of 5 thermistors must be used to determine the average temperature of the 

stored product. 

Water Sensor: A water sensor must be used to detect water incursion.

Minimum water level detectable in the tank is 0.544 inches.

Minimum change in water level that can be detected is 0.027 inches.

Calibration: Temperature sensors and probe must be checked and calibrated in accordance with 

manufacturer's instructions.

Comments: This equipment was not evaluated using manifolded tanks.

This equipment only tests the portion of the tank that contains product.

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

head pressure).

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
248

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the method or equipment.

 Revision Date: November 22, 1995

Veeder-Root

Veeder-Root 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 and

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 exceeds this 

threshold). 

Applicability: Gasoline, diesel, and aviation fuel. 

Capacity: The maximum tank capacity is 15,000 gallons.

The tank must be between 50% and 95% full.

Waiting Time: Minimum waiting time between product delivery to the tank and test data collection must 

be 6 hours and 40 minutes.

There must be no dispensing or product delivery during the test waiting time.

Test Period: The minimum data collection time must be 4 hours for normal test mode and 1.2 hours for 

rapid test mode.

Test data must be 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 product delivery during the test.

Temperature: A minimum of 5 thermistors must be used to determine the average temperature of the 

stored substance. 

Water Sensor: A water sensor must be used to detect water incursion.

Minimum water level detectable in the tank is 0.49 inches.

Minimum detectable change in water level is 0.05 inches.

Calibration: Temperature sensors and probe must be checked and calibrated in accordance with 

manufacturer's instructions.

Comments: This equipment was not evaluated using manifolded tanks.

This equipment only tests the portion of the tank which contains product.

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

head pressure).

This system was formerly called CEI 3000 and was manufactured by Control Engineers.

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: 05/27/92
249

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the method or equipment.

Revision Date: November 22, 1995

Veeder-Root

Veeder-Root 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 and

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 exceeds this 

threshold). 

Applicability: Gasoline, diesel, and aviation fuel. 

Capacity: The maximum tank capacity is 15,000 gallons.

The tank must be 95% full.

Waiting Time: Minimum waiting time between product delivery to the tank and test data collection must 

be 6 hours and 40 minutes.

There must be no dispensing or product delivery during the test waiting time.

Test Period: The minimum data collection time must be 6.38 hours for normal test mode and 2.67 

hours for rapid test mode.

Test data must be 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 product delivery during the test.

Temperature: A minimum of 5 thermistors must be used to determine the average temperature of the 

stored substance. 

Water Sensor: A water sensor must be used to detect water incursion.

Minimum water level detectable in the tank is 0.49 inches.

Minimum detectable change in water level is 0.05 inches.

Calibration: Temperature sensors and probe must be checked and calibrated in accordance with 

manufacturer's instructions.

Comments: This equipment was not evaluated using manifolded tanks.

This equipment only tests the portion of the tank which contains product.

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

head pressure).

This system was formerly called CEI 3000 and was manufactured by Control Engineers.

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: 05/21/92
250

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the method or equipment.

Revision Date: November 22, 1995

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: *

commercial

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), home heating oil #2 

(at 0.43 cm).

Comments:

EPA and many states require detection of 1/8 inch of product, which is 0.32 cm, for groundwater monitoring. 

The detectors are listed as interstitial due to intended use. 

The test procedures used were those in 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.

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
251

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the method or equipment.

Revision Date: November 22, 1995

Veeder-Root

TLS-350

Dispenser Pan Sensors and Containment Sump Sensors

LIQUID-PHASE INTERSTITIAL DETECTOR

Detector:

Output type: qualitative

Sampling frequency: continuous

Operating principle: electrical conductivity / ultrasonic

Test Results: *

commercial

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), home heating oil #2 

(at 4.67 cm).

Comments:

EPA and many states require detection of 1/8 inch of product, which is 0.32 cm, for groundwater monitoring.

The test procedures used were those in 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.

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
252

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the method or equipment.

Revision Date: November 22, 1995

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:

This point sensor is intended to monitor the level of either ethylene glycol or calcium chloride solutions in the 

interstitial or annular space of a double-walled tank, by triggering an alarm if any significant gain or loss of 

solution occurs. 

Evaluation was performed using procedures 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 modified to accommodate the intended pupose.

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
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: November 22, 1995

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: *

commercial

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, home heating oil #2, water.

Comments:

EPA and many states require detection of 1/8 inch of product, which is 0.32 cm, for groundwater monitoring.

The test procedures used were those in 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.

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
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: November 22, 1995

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:

commercial commercial

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, home heating oil #2, water.

Comments:

EPA and many states require detection of 1/8 inch of product, which is 0.32 cm, for groundwater monitoring.

The test procedures used were those in 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.

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
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: November 22, 1995

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:

commercial commercial

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, home heating oil #2, water.

Comments:

EPA and many states require detection of 1/8 inch of product, which is 0.32 cm, for groundwater monitoring.

The test procedures used were those in 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.

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
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: November 22, 1995

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:

gasoline diesel 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 (%):

commercial gasoline 100

diesel fuel 100

water 100

Comments:

EPA and many states require detection of 1/8 inch of product, which is 0.32 cm, for groundwater monitoring. 

The test procedures used were modified by the evaluator from those in 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
257

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the method or equipment.

Revision Date: November 22, 1995

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:

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

Comments:

EPA and many states require detection of 1/8 inch of product, which is 0.32 cm. 

This 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
258

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the method or equipment.

Revision Date: November 22, 1995

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:

commercial 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: commercial gasoline, JP-4 jet fuel

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

Comments:

The test procedures used were those in 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
259

Appearance on this list is 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: November 22, 1995

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 exceeds this threshold).

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

Capacity: Maximum tank capacity is 18,000 gallons. 

Data Requirement: Minimum 30 days of product level and flow through data. 

Comments: All 41 data sets were analyzed with conclusive results.

The median monthly throughput for tanks used in the evaluation was 1,000 gallons.

Leak rates of 0.05, 0.1, and 0.20 gph were used in this evaluation.

A portion of the data used in the evaluation was supplied by the vendor.

This evaluation did not include data from manifolded tanks.

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
260

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the method or equipment.

 Revision Date: November 22, 1995

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:

commercial synthetic

gasoline gasoline JP-4

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: commercial gasoline, synthetic gasoline, JP-4 jet fuel, n-hexane, toluene, xylene(s).

Comments:

The test procedures used were those in 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
261

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the method or equipment.

Revision Date: November 22, 1995

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 exceeds this threshold).

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

Capacity: Maximum UST capacity shall not exceed 18,000 gallons. 

Data Requirement: Minimum of 31 days to make an SIR evaluation at least 95% confidence at the rate of 

0.1 gph and vendor recommends 45 to 60 days for greater confidence.

Comments: Of the 41 data sets presented for evaluation, 5 were not analyzed due to unusable 

data.

The median monthly throughput for tanks used in this evaluation was 16,700 gallons.

Leak rates ranging from 0.0500 to 0.2043 were used in the evaluation.

Data sets used in this evaluation were supplied by the evaluator.

This evaluation did not include data from manifolded tanks.

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
262

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the method or equipment.

Revision Date: November 22, 1995

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 test requirements.

Leak Threshold: 0.05 gph (a leak is declared when leak rate exceeds this threshold).

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

Capacity: Maximum single tank capacity shall not exceed 30,000 gallons.

Maximum total capacity for tanks in a manifolded system shall not exceed 60,000 

gallons.

Data Requirement: Minimum 30 days of usable product level and flow through data are required.

Comments: 27% of the data sets used in this evaluation were from manifolded tanks.

A maximum of 4 tanks were included in the manifolded systems used in the evaluation.

The largest individual tank in this evaluation was 30,000 gallons.

Of the 56 data sets presented for evaluation, 6 were not analyzed due to unusable 

data.

The median monthly throughput for tanks used in this evaluation was 73,518 gallons.

Leak rates ranging from 0.0458 to 0.2500 were used in the evaluation.

Data sets used in this evaluation were supplied by the evaluator.

Over 50% of the data from large manifolded tanks was collected by automatic tank 

gauges.

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
263

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the method or equipment.

Revision Date: November 22, 1995

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 exceeds this threshold).

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

Capacity: Maximum single tank capacity shall not exceed 30,000 gallons.

Maximum total capacity for tanks in a manifolded system shall not exceed 60,000 

gallons.

Data Requirement: Minimum of 30 days of usable product level and flow through data are required.

Comments: 27% of the data sets used in this evaluation were from manifolded tanks.

A maximum of 4 tanks were included in the manifolded systems used in the evaluation.

The largest individual tank in this evaluation was 30,000 gallons.

Of the 56 data sets presented for evaluation, 6 were not analyzed due to unusable data.

The median monthly throughput for tanks used in this evaluation was 73,518 gallons.

Leak rates ranging from 0.0458 to 0.2500 were used in the evaluation.

Data sets used in this evaluation were supplied by the evaluator.

Over 50% of the data from large manifolded tanks was collected by automatic tank 

gauges.

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
264

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the method or equipment.

Revision Date: November 22, 1995

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 exceeds this 

threshold). 

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

Specification: System tests fiberglass and steel piping.

The piping system volume must not exceed 80 gallons.

Tests are conducted at 150% of the line operating pressure.

Mechanical line leak detector must be removed from the piping system being tested.

Waiting Time: There is no waiting perion between delivery and testing.

Minimum waiting time between last dispensing and testing is 1 hour. 

Test Period: The minimum data collection time must be 30 minutes.

Test data must be acquired and recorded manually.

Two tests with zero time between the tests are required before a leak can be declared.

Calibration: Equipment 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
265

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the method or equipment.

Revision Date: November 22, 1995

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 exceeds this 

threshold). 

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

Capacity: Maximum tank capacity is 15,000 gallons.

The tank must be at least 100% full.

Waiting Time: Waiting period between delivery and the beginning of the test is included in the 

waiting period after "topping off". 

Waiting time between "topping off" and beginning the test is computer-dictated by 

real-time analysis of level and temperature data. 

Waiting time is generally 4 to 12 hours.

There must be no dispensing or product delivery during the test waiting time.

Test Period: The minimum data collection time is 2 hours (two one-hour tests).

Test data must be acquired and recorded by a computer.

Leak rate is calculated from the data of last 1.5 hours of test period.

There must be no dispensing or product delivery during the test.

Temperature: A minimum of 5 temperature sensors must be used to determine the average 

temperature of the stored hazardous substance. 

Groundwater: Depth to the groundwater table present in the backfill must be determined, and if it is 

above the bottom of the tank, product level must be adjusted to provide minimum

2 psi net pressure on the bottom of the tank during the 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: This equipment was not evaluated using manifolded tanks.

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
266

Appearance on this list is 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: November 22, 1995

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 exceeds this 

threshold). 

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

Capacity: Maximum tank capacity is 75,000 gallons.

The tank must be 100% full.

Waiting Time: Minimum waiting time after adding any substantial amount of product to the tank is 

24 hours. 

Waiting time between "topping off" and beginning the test is computer-dictated by 

real-time analysis of level and temperature data and must be at least 1 hour.

There must be no dispensing or product delivery during the test waiting time.

Test Period: The minimum data collection time is 4 hours.

Test data must be acquired and recorded by a computer.

Leak rate is calculated from the data of 3 hours of test period.

There must be no dispensing or product delivery during the test.

Temperature: A minimum of 12 thermistors must be used to determine the average temperature of 

the stored hazardous substance. 

Groundwater: Depth to the groundwater table present in the backfill must be determined, and if it is 

above the bottom of the tank, product level must be adjusted to provide minimum

2 psi net pressure on the bottom of the tank during the test.

Calibration: Level sensors must be calibrated before each test in accordance with 

manufacturer’s instructions.

Temperature sensors must be checked annually and calibrated if necessary in 

accordance with manufacturer’s instructions. 

Comments: This equipment was not evaluated using manifolded tanks.

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
267

Appearance on this list is 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: November 22, 1995

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 exceeds this 

threshold. 

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

Capacity: The maximum tank capacity is 30,000 gallons.

Tank may be tested from 0 to 100% full.

Waiting Time: There is no waiting time between product delivery and test data collection.

Test Period: The minimum data collection time must be 10 hours.

Groundwater: Groundwater depth must be determined before and after the test.

When groundwater level is above the bottom of the tank but below the top, the test 

should be repeated if the groundwater level increases by more than 7 inches during test. 

When groundwater is above the tank, the test should be repeated if groundwater level 

increases by more than 5 inches.

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
268

Appearance on this list is 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: July 19, 1996

UNDER REVIEW (Listed alphabetically by Manufacturer’s name)

Test Method Vendor Equipment Model Evaluator/Date of Evaluation

Volumetric Tank Tightness 

Test (Overfill)

Absolute Precision Testing Absolute Precision Testing System Dixon

09/30/95

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

Liquid Phase Product 

Detector

Armstrong Monitoring Alertmaster 5100: AMC-5007 Environment Canada

12/03/92

Vapor Phase Product 

Detector

Armstrong Monitoring Alertmaster 5100: AMC F4000 Environment Canada

12/03/92

Line Tightness Test Method Campo/Miller, Inc. PL400 Jetronix Radio Engineering 

Laboratories 05/16/91

Liquid Phase Product 

Detector

EBW LS-30A, LS-3A, LS-7 Ken Wilcox Associates 

04/20/93

Liquid Phase Product 

Detector

EBW LS-5, LS-10, LS-15, LS-20, LS-35 Ken Wilcox Associates 

07/05/94

Automatic Tank Gauge 

(0.1 and 0.2 gph)

ENRAF B.V.

Delft Instruments

STIC 818 Ken Wilcox Associates

01/02/94

Volumetric Tank Tightness 

Test (Large Tanks)

HassTech Leak Computer Ken Wilcox Associates

07/11/92

Volumetric Tank Tightness 

Test (Overfill)

Heath Consultants Quick Chek 2000 Midwest Research Institute

03/12/90

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

Statistical Inventory 

Reconciliation

Horner Creative Products SIR Pro 1 V 3.0 (quantitative) Ken Wilcox Associates

05/31/95

Statistical Inventory 

Reconciliation

Horner Creative Products SIR Pro 1 V 4.0 (quantitative) Ken Wilcox Associates

05/25/95

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

Liquid Phase Product 

Detector

Mallory Controls Pollulert Probes MD210; MD210RA; 

MD221TJ; MD221TJRA

Radian Corp.

07/08/91

Continuous Automatic Tank 

Gauge

Marley Pump ST1400-1800, ATG, FMS, LLM ADA Technologies

10/12/92
269

Appearance on this list is 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: July 19, 1996

UNDER REVIEW (Continued)

Test Method Vendor Equipment Model Evaluator/Date of Evaluation

Vapor-Phase Product 

Detector

Mine Safety Appliances Tank-Check Carnegie Mellon Research Institute 

05/31/91

Volumetric Tank Tightness 

Test (Overfill) Large Tank

NDE Environmental Corp. Computerized VPLT Vista Research

06/17/91

Statistical Inventory 

Reconciliation (Quantitative)

Practical Tank Management Tank Management System 10 Ken Wilcox Associates 

12/02/91

Statistical Inventory 

Reconciliation (0.2 gph)

Precision Tank Service, Inc. Total SIR 1.0 Ken Wilcox Associates

07/18/95

Statistical Inventory 

Reconciliation (0.1 gph)

Precision Tank Service, Inc. Total SIR 2.0 Ken Wilcox Associates 

07/18/95

Statistical Inventory 

Reconciliation (0.1 gph)

Simmons Survey Corp. SIR 5.7 L.M. SSG Associates

10/28/95

Statistical Inventory 

Reconciliation (0.2 gph)

SIR International, Inc. Mitchell’s SIR Program (Version 

2.7)

Ken Wilcox Associates 

06/8/95

Statistical Inventory 

Reconciliation (0.1 gph)

SIR International, Inc. Mitchell’s SIR Program (Version 

2.6)

Ken Wilcox Associates 

06/8/95

Statistical Inventory 

Reconciliation (Qualitative)

Southeastern Liquid 

Analyzers

Tank Chek 4.0 Petro Works

06/03/93

Statistical Inventory 

Reconciliation (Qualitative)

Teledata, Inc. Tankmate Version 3.12 PB Com. Co.

09/29/95

Automatic Tank Gauge 

(0.1 gph)

Tidel Engineering, Inc. EMS 2000, 3000, 3500

Probes 0009 and 0010, 0021, 0022

Ken Wilcox Associates

02/10/93

Liquid Phase Product 

Detector

Tidel Engineering, Inc. EMS 3000: 301-0327-001;

301-0329-001

Radian Corp.

07/08/91

Statistical Inventory 

Reconciliation (0.2 gph)

Triangle Environmental, Inc. TRI SIR (Version 1.01) Ken Wilcox Associates 

08/23/95

Statistical Inventory 

Reconciliation (0.2 gph)

USTMAN Industries, Inc. USTMAN SIR 95.2A Ken Wilcox Associates

12/12/95

Continuous Automatic Tank 

Gauge

Veeder-Root TLS 300/400 with CSLD Midwest Research Institute

09/04/92

Statistical Inventory 

Reconciliation (0.1 gph)

Warren Rogers Assoc. SIRA Version 5.2 Ken Wilcox Associates

02/17/95

Volumetric Tank Tightness 

Test

Western Environmental 

Resources

AES Version 2

Underfill Test

Vista Research, Inc.

07/08/91
270

Appearance on this list is 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: November 22, 1995

GLOSSARY 

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.

Continuous Detector:

Detectors that operate continuously and are always present and are never turned off.

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.

Induced Leak Rate:

The actual leak rate, in gal/h, used during the evaluation against which the results from a given test device will 

be compared.

Intermittent Detector:

Detectors that monitor on a regular basis. An intermittent detector may be a hand held device that is portable 

or a permanently installed device that is used to periodically test for the presence of product.

Lag Time:

The elapsed time from the detector's first contact with test product to the first detectable signal.

Leak threshold:

This is the measured leak rate at which the test method declares 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 (RD) 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 threshold for declaring a leak is experimentally 

determined from the results of the evaluation of the RD method.

Manifolded Tanks:

Manifolded tanks are those tanks that are 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 one tank.

Measured Leak Rate:

A positive number in gal/h, measured by the 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.

N/A:

Not Applicable

Revision Date: November 22, 1995
271

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

the method or equipment.

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 gph (gal/h).

N/D:

Not Determined

N/R:

No Response

Precision:

The degree of agreement of repeated measurements of the same parameter. Precision estimates reflect 

random error and are not affected by bias.

Probability of Detection, P(D):

The probability of detecting a leak of a given size and is usually expressed as a percentage.

Probability of False Alarm, P(FA):

The probability of declaring a tank to be leaking when it is tight. It is usually expressed as a percentage.

Probe:

A component of a detection system that must come into contact with product before product can be detected 

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.

Resolution:

The resolution of a measurement system is the smallest change in the quantity being measured which the 

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.

Ullage Test:

An ullage test tests the un-wetted portion of the tank, or that portion of the tank that is not in contact with 

product. These tests can use a variety of physical phenomena including acoustical signals and pressure gain 

or loss in the ullage space of a sealed system.