COMPLIANCE INFO_1987-1998 - Laserfiche WebLink

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Results oi ij.S. LP" d L4 uativa Voluetric TankTightness .' 1 d This form tells whether the tank tightness testing method 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: Volumetric Tank Tightness Testing Methods." 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 provide compliance with the federal regulations. Tank owners should check with State and local agencies to make sure this form satisfies their requirements. Method Description - Name Tidel Environmental Monitoring System Vendor Tidel Engineering, i-BettlineRoad Carrollton, Texas -75006 a 416-82 Evaluation Results This method which declares a tank to be leaking when the measured leak rate exceeds the threshold of 0.05 gallon per hour, has a probability of false alarms [P(FA)] of 4.67 %. The corresponding probability of detection [P(D)] of a 0.10 gallon per hour leak is 95.33 %. Therefore, this method ()Q does ( ) does not meet the federal performance standards established by the U.S. Environmental Protection Agency (0.10 gallon per hour at P(D) of 95% and P(FA) of 5%). The evaluation testing was conducted in a 10.000 gallon (?) steel O fiberglass tank that was 96 inches in diameter and 324 inches long. The tests were conducted with the tank product levels 50 to 90 percent full. The temperature difference between product added to fill the tank and product already in the tank ranged from -5.33 deg F to +5.35 deg F, with a standard deviation of 4.25 deg F. The product used in the evaluation was unleaded gasoline Volumetric TrT Method - Resutts Form Page 1 of 2