Issue Date: November 22, 1995
Revision Date: May 5, 2003

Simmons Corp.

SIR 5.7


Certification Leak rate of 0.1 gph with PD = 99.0% and PFA = 1.0%. 
"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 if the test result indicates a loss or gain that equals or exceeds this threshold.
Gains (water ingress) are analyzed and evaluated on an individual basis.
Applicability Gasoline, diesel. 
Tank Capacity Maximum of 18,000 gallons.
Data Requirement Minimum of 30 days of product level and flow through data.
Comments Not evaluated using manifolded tank systems. 
Of 41 data sets submitted for evaluation, all were analyzed with conclusive results. 
Median monthly throughput of tanks evaluated was 7,000 gallons. 
Leak rates ranging from 0.05 to 0.2 gph were used in evaluation. 
Data sets evaluated were supplied by evaluator.


Simmons Corp.

Evaluator:  S.S.G. Associates

106 E. Main Street

Tel:  (601) 234-1179

Richardson, TX 75081-3327

Date of Evaluation:  12/15/92

Tel:  (800) 848-8378



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