Issue Date: November 22, 1995
Revision Date: April 5, 2002

(originally listed as Ustman Industries, Inc.)



Certification Leak rate of 0.1 gph with PD = 98.4% and PFA = 1.6%. 
"If a method meets the requirement for detecting a leak rate of 0.1 gph, it will meet the requirement for 0.2 gph.", according to "Standard Test Procedures for Evaluating Leak Detection Methods:
Statistical Inventory Reconciliation Methods", EPA/530/UST-90/007, June 1990, Section 7.2.3, page 30.
Leak Threshold 0.05 gph. 
A tank system should not be declared tight when a consistent loss or gain equals or exceeds this threshold at the 5% level of significance.
Applicability Gasoline, diesel. 
Tank Capacity Maximum of 18,000 gallons.
Data Requirement Minimum of 42 days of product level and flow through data.
Comments Not evaluated using data from manifolded tank systems. 
Of 41 data sets submitted for evaluation, 4 data sets were not analyzed and 7 were inconclusive. 
Median monthly throughput of tanks evaluated was 10,978 gallons. 
Leak rates ranging from 0.048 to 0.201 gph were used in evaluation. 
Data sets evaluated were supplied by evaluator.


Gilbarco/Veeder Root

Evaluator:  Ken Wilcox Associates

Attn: CMS Mailstop F-76

Tel:  (816) 443-2494

7300 West Friendly Ave.

Date of Evaluation:  10/31/91

P.O. Box 22087  
Greensboro, NC 27420-2087  

Tel:  (800) 253-8054



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