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UST Program - LG 113

UST Program - LG 113

Issue Date: November 23, 2010

Leighton O'Brien Technologies, Ltd.

Quantitative Wet Line Test PM2 (for Rigid and Flexible Pipelines)



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

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, biodiesel B6-B20 meeting ASTM D7467 biodiesel B100 meeting ASTM D6751*.
Pipelines containing other liquids may be tested after approval from the manufacturer.


System tests fiberglass, steel and flexible pipelines. 
Wet Tests are conducted at 45 psi or 150% of operating pressure. 
Mechanical line leak detector must be removed or manually isolated from pipeline for duration of test, or if testing is to be conducted with mechanical line leak detector in place, check valve in pump must be manually closed. 

Pipeline Capacity

Maximum of 371.22 gallons in rigid piping.
Maximum of 109.8 gallons in flexible piping.
Maximum total of 481 gallons in combination rigid and flexible (the capacity of the flexible component cannot exceed 109.8 gallons).
Manifolded piping may be tested as long as the total length of piping is within the capacity and configuration limitations.

Waiting Time

None between delivery and testing. 
Minimum of 27.5 minutes between dispensing and testing.

Test Period

Under ideal conditions, 17.25 minutes after installing in line.
Test data is collected continuously and recorded by computer.
Data is analyzed at the Leighton O'Brien analysis center with telemetry.


No temperature sensors used.
System must be calibrated yearly in accordance with manufacturer's instructions.


Groundwater is overcome with pressure on the system during the wet test.


Leighton O'Brien Technologies, Ltd.

Evaluator:  Ken Wilcox Associates

Suite 1/96 Camberwell Road

Tel:  (816) 443-2494

Hawthorn East, Victoria , Australia 3123

Date of Evaluation:  10/11/10

Tel:  +61(03) 9813 5122  
Email: enquiry@leightonobrien.com  

URL: http://www.leightonobrien.com


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Equipment should be installed and operated in accordance with all applicable laws and regulations.
For full details, please refer to our expanded "DISCLAIMER" page.