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C <br />A. Initial Leak Test <br />An initial testing of the underground fuel storage tanks was <br />conducted by a licensed contractor using the "petro-tite" <br />testing technique to determine container integrity. This <br />testing indicated that the underground fuel storage tank and <br />the underground piping was not leaking. Immediate action <br />will be taken to precision test the underground tank and <br />associated piping should the precision monitoring records <br />indicate a loss or gain of product that cannot be reconciled <br />or presence of other indications that would indicate in all <br />probability that the tank -or piping is leaking. <br />Any leakage from the underground tanks or associated piping <br />resulting in soil or water contamination that may be <br />identified during any subsequent leak testing or monitoring <br />will be reported to the Fire Department. Any remedial <br />action required will be accomplished in compliance with the <br />regulatory agency having jurisdiction. <br />The diesel fuel stored at this facility is utilized as an <br />energy source to power "Stand-by Power" electrical <br />generating equipment. As such, the diesel fuel maintained <br />in the underground containers remains in a static state <br />except for monthly testing of the equipment and times of <br />commercial power interruption. <br />B. Precision Product Monitoring <br />Because of underground tank orientation and facility <br />staffing daily manual inventory control monitoring of the <br />diesel fuel and long term tank monitoring for product <br />leakage will be accomplished with in -tank precision product <br />monitoring. This will be provided through the installation <br />of the TLS -250 Tank Level Sensor manufactured by Veeder- <br />Root, a subsidiary of Western Pacific Industries Corporation <br />or equivalent. <br />The TLS -250 system consists of a Computerized Inventory <br />Monitor (CIM) and one Digital Sending Probe (DSP) for each <br />tank being monitored. The highly accurate, all -electronic <br />probe has no moving parts for greater accuracy and less <br />maintenance than other electromechanical, float -type <br />devices. A single CIM can handle four probes and <br />continuously monitor each one, analyzing their signals for <br />