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• Tracer Research Corporation <br /> Results of U.S. EPA Standard Evaluation <br /> Nonvolumetric Tank Tightness Testing Method <br /> This form tells whether the tank tightness testing method described below complies with the <br /> performance requirements of the federal underground storage tank regulation. The <br /> evaluation was conducted by the equipment manufacturer or a consultant to the <br /> manufacturer according to the U.S. EPA's "Standard Test-Procedure for Evaluating Leak <br /> Detection Methods: Nonvolumetric Tank Tightness Testing Methods." The full evaluation <br /> report also includes a form describing themethodand a form summarizing the test data. <br /> Tank <br /> ompliancerwithtthe this <br /> regulations. system <br /> ownersshouldthis form on file to che k with State andlrove <br /> ocalagencies to make sure this form satisfies their requirements. <br /> Method Description <br /> Name: Tracer Research Co oration <br /> Vendor: Tracer Research Corooration <br /> 3855 North Business Center Drive <br /> (slroet address) <br /> Tucson Arizona 85705602 88-940 <br /> (�tS) (state) (zip) hone) <br /> Evaluation Results <br /> This method, which declares a tank to be leaking when t) threshold amount of Tracer <br /> chemical is detected as a va or in the soil outside the ank has an estimated probability <br /> of false alarms [P(FA)] of % based on the test results of 1 false alarms out of 34 <br /> tests. A 95% confidence interval for P(FA) is from 0 to 8 5 %. <br /> The corresponding probability of detection [P(D)] of a _0.005,gallon per hour leak is 97.1 <br /> % based on the test results of 33 detections out of 34 simulated leak tests. A 95% <br /> confidence interval for P(D) is from 91.5 to 100 %. <br /> Does this method use additional modes of leak detection? I ] Yes [X] No <br /> If Yes, complete additional evaluation results on page 3 of this form. <br /> Based on the results above, and on page 3 if applicable, this method [X] does [j does not <br /> meet the federal performance standards established by the U.S. Environmental rotection <br /> Agency (0.10 gallon per hour at P(D) of 95% and P(FA) of 5%). <br /> Test Conditions During Evaluation <br /> 'Die evaluation testing was conducted in a varying size gallon [X steel [X] fiberglass tank <br /> that was inches in diameter and _ inches long, instal�ed in backfill. <br /> The ground-water level was vajyin inches above the bottom of the tank. <br /> Nonobmsetric TTr Method-$es•its Fo <br /> Pte 1 of 3 <br />