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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 accordin 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 Comoration <br /> Vendor: Tracer Research Corporation <br /> 3855 North Business Center.Drive <br /> street address) <br /> Tucson Arizona 85705 (602) 888-9400 <br /> (city) (static) (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 va or in the soil outside the tank has an estimated probability <br /> of false alarms [P FA ] of .9 % based on the test results of 1 false alarms out of 34 <br /> tests. A 95% co deuce 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 from1Q_,_5, to 10 %. <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 [ ] 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 testis&was conducted in a varying size gallon [Xj steel [X] fiberglass tank <br /> that was inches in diameter and inches long, installed in backfill. <br /> The ground-water level was ya n inches above the bottom of the tank. <br /> Now"Ammotdc TIT Mcd od-Raaks Fees ?aCe l of 3 <br /> F <br />