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UST Program - LG 113

UST Program - LG 113

Issue Date: November 22, 1995
Revision Date: November 6, 1997

Ibex Industries

Ibex Precision Test System


Certification Leak rate of 0.1 gph with PD = 99.5% and PFA = 0.5%.
Leak Threshold 0.05 gph. 
A tank system should not be declared tight if the test result indicates a loss or gain that equals or exceeds this threshold.
Applicability Gasoline, diesel, aviation fuel, fuel oil #4. 
Other liquids with known coefficients of expansion and density may be tested after consultation with the manufacturer.
Tank Capacity Maximum of 18,000 gallons. 
Tank must be between 92 and 100% full.
Waiting Time Minimum of 12 hours between delivery and testing. 
Minimum of 3 hours between "topping off" and testing. 
There must be no product dispensing or delivery during waiting time.
Test Period Minimum of 1 hour. 
Test data are acquired and recorded by system's computer. Leak rate is calculated from data determined valid by statistical analysis. 
There must be no dispensing or delivery during test.
Temperature Average for product is determined by a minimum of 6 temperature sensors.
Groundwater Depth to groundwater in tank excavation backfill must be determined. 
If groundwater is above bottom of tank, product level must be adjusted to provide net pressure of 2-4 psi on bottom of tank during test.
Calibration Level sensors must be calibrated in accordance with manufacturer's instructions before each test. Temperature sensors must be calibrated in accordance with manufacturer's instructions semi-annually.
Comments Not evaluated using manifolded tank systems. 
Tests only portion of tank containing product.


Ibex Industries

Evaluator:  Applied Research Center

Moved and left no forwarding address

Tel:  (805) 664-2173

or phone number.

Date of Evaluation:  01/18/91

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