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Performance Report
UST Program - LG 113

UST Programs - LG 113

Issue Date: November 7, 2001
Revision Date: February 22, 2017


TotalSIR Version 1.0


Certification Leak rate of 0.2 gph with PD > 99.9% and PFA < 0.1% for leak threshold of 0.1 gph.
Leak rate of 0.2 gph with PD > 97.2% and PFA < 0.1% for leak threshold of 0.16 gph.
Leak Threshold If the absolute value of the calculated leak rate (gain or loss) is less than the leak threshold and the minimum detectable leak rate is less than or equal to 0.2 gph, the test result is "pass." If the absolute value of the calculated leak rate is greater than or equal to the leak threshold, the result is "fail." If the minimum detectable leak rate exceeds 0.2 gph and the absolute value of the calculated leak rate is less than the leak threshold, the test result is "inconclusive."
Applicability Gasoline, diesel, kerosene.
Other more viscous liquids may be tested after consultation with the vendor.
Tank Capacity Maximum of 45,000 gallons for single tanks.
Maximum of 45,000 gallons cumulative capacity for manifolded tank systems with no more than 4 tanks in system.
Data Requirement Minimum of 23 days of product level and flow through data.
System Features Method of data analysis that system employs, and was used during evaluation process, is exclusive of any external control by vendor.
System consists of a fully automated software package with embedded algorithms for conducting leak detection testing. Consequently, third party evaluation procedure demonstrated that system can be used in-house with no requirement for direct vendor participation.
Evaluation Features This system was tested for in-house use.
Vendor, with evaluator present, analyzed required data and performed evaluation using program disk only.
Results were presented to evaluator directly from the computer without additional vendor involvement.
Comments Gains (water ingress) are investigated using current and previous month raw inventory data.
73% of data sets were from manifolded tank systems.
Of 41 data sets submitted for evaluation, 4 were inconclusive.
Median monthly throughput of tanks evaluated was 22,370 gallons.
Leak rates of 0.05, 0.1, and 0.2 gph were used in evaluation.
Data sets evaluated were supplied by evaluator.

The listed method certified with a detectable leak rate of 0.2 gallons per hour and a leak threshold of 0.16 gallons per hour does not meet the Federal UST requirement for Statistical Inventory Reconciliation to use a threshold that does not exceed one-half the minimum detectable leak rate. (40 Code of Federal Regulations, part 280, subpart 43, subdivision (h), paragraph (3).)



Evaluator: Ken Wilcox Associates

P.O. Box 2040

Tel:  (816) 443-2494

Cornelius, NC 28031

Date of Evaluation:  04/07/93, 07/18/95, 06/16/00, 08/27/01

Tel: (704) 892-9941


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