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May 06 03 11:31a A TAR/WESTSTAR (555h&277-0 106 MAY -06-2003 TUE 03.02 PM MPT FAX N0. 000 4W329 P, 04 Results of U.S. EPA Alternate Evaluation This form tells whether the automatic tank gauging systema (ATOS) described below complies with the performance requizements of the federal underground storage tank regulation. The evaluation was conducted by the equipment manufacturer or a consultant to the manufacturer according to the US. EPA's "Standard Test Procedure for Evaluating Leak Detection Methods: Automatic Tank Causing Systems." The full evaluation report also includes a form describing the method asad a form summarizing the test data. Tank owners using this }talc detection system should keep this form on irk to provide compliance with the'federal regulations. Tarok owners should check with State and local agencies to make sure this form satisfies their requirements. ATGS Description Name Auto_Stik Series 960.970 Version number Gontinuous Au--- c IA k r2auge Vendor EB.W.Ino. _281�11racken _venue uskeoan Ml 49441 =475-51 51 Evaluation Results This ATGS, which declares' a tank to be leaking when the measured leak rate exceeds the threshold of a.QZ gallon per hour, has a probability of false alarms [P(FA)] of p,.Z2/o. The corresponding probability of detection [P(D)j of a 0.20 gallon per hour leak is %. The minimum water level (threshold) in the tank that the ATGS can detect is -%91 __ Inches. The minimum Change In water level that can be detected by the ATGS is -0,025_ inches (provided that the water level is above the threshold). Therefore. this ATGS (X) 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%), and this ATGS (X) does ( ) does not meet the federal performance standard of measuring water in the bottom of the tank to the nearest 1/8 inch. The evaluation testing was conducted in a6 000 t MOM gallon (X) steel (X) fiberglass tank that was —. 1Q 1 0 inches in diameter and 125_W 467 inches long. The temperature difference between product added to fill the tank and product already in the tank ranged from _ (fie ) deg F to deg F, with a standard deviation of (see aQlol deg F. The tests were conducted with the tank product levels _ to -95 % full. The product used in the evaluation was 9m line ajd d e��. I The product temperature differences for delivered fuel are not available. Test results from hot, cold, and mild months were used in the evaluation. ATGS • Results Form Page 1 of 2 M