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UST Program - LG 113

UST Programs - LG 113

MassTech International, Ltd.
ML3P Line Leak Detection System



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

Leak Threshold

0.05 gph. 
A pipeline system should not be declared tight if the test result indicates a loss that equals or exceeds this threshold. 


Gasoline, diesel, aviation fuel, fuel oil #4. Other liquids may be tested after consultation with the manufacturer.


System tests fiberglass and steel pipelines. 
Where an electronic or mechanical line leak detector is installed in the system, a complete test includes but is not limited to data collection at ambient pressure and at pressures of 7.5, 15, and 22.5 psi.  Where the line leak detector is removed from the system, a complete test includes but is not limited to data collection at ambient pressure and at a pressure of 22.5 psi.  Additional data can be collected at pressures higher than 22.5 psi.
Tests can be performed with trapped vapor in pipeline.
Pipeline may be empty, partially full or full of product during testing.

Pipeline Capacity

Maximum of 172 gallons.  For testing lines greater than 3-inch diameter, contact MassTech.

Waiting Time

None between delivery and testing. 
None between dispensing and testing.

Test Period

Test times varied from 29 to 77 minutes during the evaluation.


System is checked biennially and, if necessary, calibrated in accordance with manufacturer's instructions.


Leak rate during testing was adjusted to an equivalent of 0.1 gph at 45 psi.
System monitors for pressure changes which exceed the predicted environmentally compensated pressure changes.
Test data are acquired and recorded automatically.
Data collected by technicians at the test site are analyzed by trained personnel located off-site who notify owner of their pass/fail determination.

MassTech International, Ltd.
102 Basile Road
Scott, LA 70583
Tel: (337) 896-8230
E-mail: masstech1@compuserve.com
URL: http://masstechinternational.com
Evaluator: Ken Wilcox Associates, Inc.
Tel: (816) 443-2494
Date of Evaluation: 08/23/07

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Appearance on this list is not to be construed as an endorsement by any regulatory agency nor is it any guarantee of the performance of the method or equipment.
Equipment should be installed and operated in accordance with all applicable laws and regulations.
For full details, please refer to our expanded "DISCLAIMER" page.