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�GHAVS <br /> CIVIL ENGINEERING,LAND PLANNING,SURVEYING,ENVIRONMENTAL SERVICES <br /> 42 <br /> August 4, 1999 <br /> FEDERAL EXPRESS <br /> '4 <br /> 0s <br /> 19.9 <br /> Michael Kith <br /> San Joaquin County <br /> Environmental Health Division <br /> 304 East Weber Avenue, 3rd Floor <br /> P.O. Box 388 <br /> Stockton, CA 95201-0388 <br /> RE: Application for Installation of New Tank and Piping <br /> Existing ARCO AM/PM Mini-Market Facility <br /> 16 East Harding Way, Stockton, California <br /> ARCO FAC No. 4932/ Our Job No. 7063 <br /> Dear Michael: <br /> On behalf of the Atlantic Richfield Company, Barghausen Consulting Engineers, Inc., is submitting further <br /> clarification for the electronic line leak detector as requested by your office. Your concerns and responses <br /> are as follows: <br /> Provide information on the leak detector on the turbine (i.e., 3 GPH). Provide the LG 113 listing and the <br /> approved equipment for this leak detector. How does this detector interface with Veeder Root monitoring <br /> panel? <br /> Response: The Red Jacket CPT, 2 H.P., variable speed turbine includes an electronic leak detector rated at <br /> 3 GPH. This electronic leak detector replaces the mechanical leak detector that was previously installed on <br /> the pump. The cut sheets from Red Jacket and excerpts from the California State Water Resources Control <br /> Board,LG-113-12,have been previously transmitted. The Red Jacket constant pressure turbine electronic leak <br /> detector operates in the following manner: The leak detector is a pressure transducer that is attached to the <br /> turbine. The pressure transducer, located at the output of the turbine, senses the pressure across the product <br /> line and sends a signal to the CPT controller to regulate the speed of the turbine and maintain a constant flow. <br /> If the transducer senses a loss in pressure of 3 GPH or greater, it interprets that loss as a line leak and sends <br /> a signal to the controller to shut the turbine down. There is no interface required to a Veeder Root control <br /> panel, as it is independent and operates as a stand alone leak detector that interfaces directly with the turbine <br /> controller unit, therefore, activating or deactivating the turbine as required. <br /> 18215 72ND AVENUE SOUTH KENT,WA 98032 (425)251-6222 (425)251-8782 FAX <br />