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A dsy$tB/715 4191-E Poser Inn Read, Sacramento, CA 95826 (916)452.29` <br /> •FREMONT •IRVINE •HOUSTON • BOSTON e SACRAMENTO a CULVER CITY • SAN LOSE <br /> July 13, 1987 <br /> 87048-1 <br /> E�Ir. Steve Epperson <br /> Beacon Oil company <br /> 525 west Third street <br /> Hanford, california 93230 <br /> Subject: Transmittal of Report No. 87048-1, Subsurface <br /> Environmental Investigation, soil Boring and <br /> Monitoring Well Installation at Beacon Station, <br /> §675, 13975 East Highway 88, Lockeford, California <br /> k Mr. Epperson: <br /> This report presents our findings from the environmental <br /> investigation conducted at the above-referenced site. The <br /> purpose of the investigation was to evaluate potential <br /> hydrocarbon contamination of subsurface soil and ground water at <br /> Che site. The in <br /> included the drilling of four soil <br /> ation of four 2-inch diameter g <br /> borings, installroundwater <br /> well development and surveying, ground water <br /> monitoring wells, <br /> sampling, and laboratory analyses. <br /> This investigation indicates that ground water beneath the site i <br /> n <br /> has hydrocarbo °otenstandardsthat <br /> recommendedwithin <br /> by gheeState <br /> acceprally <br /> ted drinking water r <br /> Department of Health Service,. Two, open dry. wells are located <br /> in catch basins adjacent to Highway 83. These dry wells lts. }ct as <br /> drains for runoff (wash-downs, rain, product spills, <br /> om <br /> and <br /> the product dispenser area provide a conduit for the <br /> introduction of hydrocarbons into the soil and ground water. We <br /> Tecommend that the dry wells be destroyed. We also reComm <br /> edeand <br /> that water in the ground water monitoring wells be samp <br /> analyzed quarterlY for dissolved hydrocarbon contamination to <br /> evaluate contaminate trends. <br /> In our opinion, if ground water useage warrants, or if ground <br /> water monitoring indicates the continuing or increasing <br /> introduction of hydrocarbon contamination into the ground water, <br /> ----.-----_----..__...----...--__._-- .------the. of ground water contamination should be further <br /> investigated by conducting--a sort--vapor--investigation--.an _or_._ y__.—_..__ <br /> excavating selectively located boreholes and installing <br /> additional ground water monitoring wells. <br />