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Results of '.S. EPA Standard Evaluatior Automatic Tank Gauging System (A?GS) lhis form tells whether the automatic tank gauging system (ATGS) described below complies with the performance requirements of the federal underground storage tank regulation. The evaluation was conducted by the equipment manufacturer or a consultant to the manufacturer according to the U.S. EPA's "Standard Test Procedure for Evaluating Leak Detection Methods: Automatic Tank Gauging Systems." The full evaluation report also includes a form describing the method and a form summarizing the test data. Tank owners using this leak detection system should keep this form on file to prove compliance with the federal regulations. Tank owners should check with State and local agencies to make sure this form satisfies their requirements. ATGS Description Name EASI Level -Tru Version number Vendor 721 Charcot Avenue street a dress qoe San Jose, CA 95131 (JdM) 954-9081 M,,, 7io (0hone) Evaluation Results This ATGS, which declares a tank to be leaking when the measured leak rate exceeds the threshold of 0.1gallon per hour, has a probability of false alarms [P(FA)] of 4. 6 %. The corresponding probability of detection [P(D)] of a 0.20 gallon per hour leak is 95. 4 %. The minimum water level (threshold) in the tank that the ATGS can detect is 0.896 inches. The minimum change in water level that can be detected by the ATGS is (provided that the water level is above the threshold). Therefore, this ATGS 0 does ❑ does not meet the federal performance standards established by the U.S. Environmental Protection Agency (0.20 gallon per hour at P(D) of 95% and P(FA) of 5%), and this ATGS El does ❑ does not meet the federal performance standard of measuring water in the bottom of the tank to the nearest 1/8 inch. 023 inches Test Conditions During Evaluation The evaluation testing was conducted in a 10.000 gallon L111 steel ❑ fiberglass tank that was 96 inches in diameter and 324 inches long. The temperature difference between product added to fill the tank and product already in the tank ranged from -5.7 °F to 6.1 OF, with a standard deviation of 4.5 F. The tests were conducted with the tank product levels 50 and 90-95 % full. The product used in the evaluation was diesel fuel ATGS - Results Form _- -- -1 lowac, itmdly notify of at once. ,re not „ noted, kindly notify w ,t onc.. 11 enclo,mv err not .. -m.n Page 1 of 2