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July 16, 1987 AGS Job No. 87048-1 <br /> Beacon station 4675 - Lockeford, CA <br /> The soil analyses showed very low to non-detectable levels of <br /> hydrocarbon contamination to be present in soil samples analyzed <br /> from MW-1, MW-2, and MW-4. Hydrocarbon levels detected in soil <br /> samples analyzed from MW-2 indicated .low to relatively moderate <br /> hydrocarbon contamination. Water samples analyzed from MW-1 <br /> through MW-4 contained low levels of total volatile hydrocarbons, <br /> but concentrations of benzene in MW-1 through NW-4, and toluene <br /> in MW-2, were detected that exceed generally accepted drinking <br /> water standards recommended by the State Department of Health <br /> Services. The highest concentrations of total volatile <br /> hydrocarbons and benzene were detected in soil and water samples <br /> collected from MW-2. The limited data available seems to <br /> indicate that the source of the contamination is downgradient of <br /> the tank pit and in the general viciniY of the product <br /> dispensers. Two open dry wells are located in catch basins <br /> adjacent to Highway 88. These dry wells act as drains for runoff <br /> (washdowns, rain, product spills, etc. ) from the product <br /> dispenser area and provide a conduit for the introduction of <br /> hydrocarbons into the groundwater. <br /> 11 . <br /> AOOlied GeO Systems <br />