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Applied GeaSystems 4191-E Power Inn Road, Sacramento, CA 95826 (916) 452-2901 <br /> 0 FREMONT 9 COSTA MESA • SACRAMENTO • HOUSTON <br /> 9 . :. <br /> July 13 , 9 7._ <br /> 87048-� . L)REENTAL HEALTH <br /> FERfAIT/SERVICES. <br /> .,� Mr. 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 /> i.. Environmental Investigation, Soil Boring and <br /> Monitoring Well Installation at Beacon Station, <br /> #675 , 13975 East Highway 88 , Lockeford, California <br /> Mr. Epperson: <br /> 4W 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 /> the site. The investigation included the drilling of four soil <br /> borings , installation of four 2-inch diameter groundwater <br /> � monitoring wells , well development and surveying, ground water <br /> sampling, and laboratory analyses. <br /> This investigation indicates that ground water beneath the site <br /> has hydrocarbon contamination that is not within generally <br /> accepted drinking water standards recommended by the State <br /> Department of Health Services. Two, open dry wells are located <br /> in catch basins adjacent to Highway 88 . These dry wells act as <br /> drains for runoff (wash-downs, rain, product spills, etc. ) from <br /> the product dispenser area and provide a conduit for the <br /> introduction of hydrocarbons into the soil and ground water. We <br /> recommend that the dry wells be destroyed. We also recommend <br /> that water in the ground water monitoring wells be sampled and <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 extent of ground water contamination should be further <br /> investigated by conducting a soil vapor investigation and/or by <br /> excavating selectively located boreholes and installing <br /> additional ground water monitoring wells . <br /> i� <br />