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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 the method and a form summarizing the test data. <br /> Tank owners using this leak detection system should keep this form on file to prove <br /> compliance with the federal regulations. Tank owners should check with State and local <br /> agencies to make sure this form satisfies their requirements. <br /> Method Description <br /> Name: Tracer Research Corpora ion <br /> Vendor: Tracer Research Corporation <br /> 3855 North Business Center Drive <br /> stroa addr�) <br /> �'ucSon Arizona 85705 (602) 888-9400_ <br /> (city) (stats) (zip) hone) <br /> Evaluation Results <br /> This method, which declares a tank to be leaking when a threshold amount of Tracer <br /> chemical is detected as a vapor in the soil outside thehas an estimated probability <br /> of false alarms [P FA ] ot 9 % based on the test results of _L false alarms out of <br /> tests. A 95% confidence interval for P(FA) is from Q to 8.5 %. <br /> The corresponding probability of detection [P(D)] of a -.005 ballon per hour leak is 97.1 <br /> % based on the test results of 22 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? [ ] 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 [ 1 does not <br /> meet the federal performance standards established by the U.S. Environmental Protection <br /> Agency (0.10 gallon per hour at P(D) of 95% and P(FA) of 5%). <br /> Test Conditions During Evaluation <br /> The evaluation testing was conducted in a varynP size gallon [Xl steel [X] fiberglass tank <br /> that was inches in diameter and _ inches long, instaalllled in backfill. <br /> The ground-water level was varying inches above the bottom of the tank. <br /> Nw"Ammelric'M MOW-Reaps Pan• rt4 143 <br />