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UST Program - LG 113

Issue Date: April 25, 2012

Fairbanks Environmental Ltd.

Wetstock Wizard Version 4.4

STATISTICAL INVENTORY RECONCILIATION TEST METHOD (QUALITATIVE)

Certification	Leak rate of 0.2 gph with PD > 99% and PFA < 1% for both single and manifolded tank systems.
Leak Threshold	0.10 gph. 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.
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 30 days of product level and throughput data.
Comments	Inventory data was submitted by vendor to evaluator who adjusted data and returned to vendor for analysis. 49% of data sets were from manifolded tank systems. Of 41 data sets submitted for evaluation, 36 were analyzed with conclusive results. Median monthly throughput of tanks evaluated was 25,173 gallons. Leak rates of 0.05, 0.1, and 0.2 gph were used in evaluation. Results of evaluation is applicable only for tanks using ATGs to collect data.

Faribanks Environmental, Ltd.	Evaluator: Ken Wilcox Associates
The Technology Management Center	Tel: (816) 443-2494
Moss View Lane	Date of Evaluation: 11/10/2004 (rev. 8/10/2006)
Skelmersdale, Lancashire, UK
Phone +44 (0) 1695 51775

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