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ST&WCALIFORNIA GEORGE OEUKhKLA N.Gowma <br /> LIFORNIA REGIONAL WATE QUALITY CONTROL BOARD- RIM <br /> - <br /> CENTRAL VALLEY REGION <br /> 3443 ROUTIER ROAD <br /> SACRAMENTO,CA 85827-3098 <br /> 19 October 1988 <br /> Mr. Charles Nichols <br /> USA Petroleum corporation OCT 2 1 1988 <br /> P.O. Box 1839 <br /> Santa Monica, CA90406 <br /> Ei'v v <br /> REPO REQUIREMENTS FOR USA STATIONS #65 AT <br /> We have reviewed the 13 October 1988 letter from your consultant, <br /> Applied GeoSystems; regarding •the need for additional work at the <br /> site and the necessity for submitting previously requested <br /> reports. Staff does not concur with the following <br /> statements/conclusions made in the letter: <br /> 1. The levels of contamination do not warrant further <br /> delineation drilling or the preparation of a Problem <br /> Assessment Report. <br /> Previously submitted reports indicate• high levels of ground <br /> water contamination beneath the tank pit(up to 1700, 2500, <br /> and 2000 ppb BT&X respectively) . Also, peripheral wells <br /> were not placed in the indicated down gradient direction, so <br /> the actual extent of contamination has not been <br /> satisfactorily determined. <br /> 2. Applied GeoSystems Report No. 87050-2 "Delineation of <br /> Hydrocarbon Contamination and Hydrogealogic <br /> Characterization, " dated .13 October 1987, satisfies the <br /> requirements "of a Preliminary geport. <br /> The Applied GeoSystems report lacks the following: <br /> a. - Detailed site map showing tank location and type, <br /> piping, buildings, nearby septic systems, leachfields, <br /> underground lines (including water, sanitary sewer and <br /> storm sewer) , streets, and adjacent properties (North <br /> toward the top of the page, and approximate scale <br /> 1 inch - 20 feet) . <br /> b. Estimates of quantity and composition of the liquid <br /> leaked (including basis of estimate) . <br /> C. History of site use (including tank use) . <br />