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i W4 <br /> i <br /> July 16, 1987 AGS Job No. 87048-1 €i <br /> Beacon Station #675 - Lockeford, CA ,' <br /> The relatively low levels of dissolved hydrocarbon contamination I_ <br /> present in the soil and <br /> ground water could be considered _ <br /> consistant with levels of contamination introduced from minorif <br /> product spills (routine customer useage) around the dispenser <br /> area, that are flushed into the dry wells. ?� <br /> z <br /> RECOMMENDATIONS <br /> We recommend that the two dry wells adjacent to Highway 88 be <br /> destroyed and that the water in the monitoring wells be sampled <br /> and analyzed quarterly for dissolved hydrocarbon contamination; i <br /> and that an evaluation of _the ground water usage, and background <br /> quality, in the vicin_ty of -the site should be performed. <br /> If ground water.useage warrants, or if groundwater monitoring <br /> indicates continuing or increasing introduction of hydrocarbon <br /> contamination into the ground water, the extent of ground water <br /> contamination should be further investigated by conducting either <br /> soil vaporprobe analyses in the vicinity of the contamination <br /> plume, and/or by excavating two or more selectively located <br /> boreholet and installing additional ground water monitoring <br /> wells. We also recommend that a copy of this report be sent to <br /> N1r. Gorden Boggs of the California Regional Water Quality Control <br /> Board, Central Valley Region, 3443 Routier Road, Sacramento, CA. , <br /> 95827-3098. <br />