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-„ <br /> WtiSTERN GEOLOGIC RESOURCES , INC , <br /> EXECUTIVE SUNINI <br /> AIZY <br /> 40 r ; <br /> Western Geologic Resources,Inc.(WGR)conducted a subsurface investigation in August and <br /> September 1989 at Apache Plastics, Inc. (API) located at 2050 East Fremont Street !n Stcx,kton, <br /> California. The purpose of this investigation was to determine if fuel hydrocarbons are present in the <br /> SOB and shallow groundwater beneath the site. <br /> r a Four soil borings,B-1 through B-4,were drilled and completed as monitor wells MW-1 through <br /> MW-41 respectively. Well MW-1 is located near the former underground storage t <br /> a*along the north <br /> side of the site. Wells MW-2, MW-3 and MW-4 are located near the northeast, the oorthwr-st d <br /> southeast corners Of the API building,respectively. First water was observed at about 63 ft below grade <br /> during drilling of the borings. <br /> Soil samples collected during drilling of boring B-1 contained total purgeable petroleum <br /> hydrocarbons (TPPH), characterized as gasoline, up to 5,200 parts-per-million (ppm) and aromatic <br /> hydrocarbons up to 570 ppm xylenes. The 59 ft sample from boring B-3 contained 0.005 ppm xylenes. <br /> Low concentrations of 1,2-dichloroethane(1,2-DCA)were detected in the 67.7 ft sample collected from <br /> boring B-2 and the 67.2 ft sample from boring B-3. TPPH and are r h d <br /> detected in any of the soil samples from borings B-2 and B-4, hydrocarbons were not <br /> TPPH,characterized as gasoline,were present in the groundwater samples from wells MW-1 <br /> and MW-3 at concentrations up to 750,000 parts-per-billion(ppb)and 300 ppb,respectively. Aromatic <br /> hydrocarbons with benzene up to 32,000 ppb, 1,2-DCA and ethylene dibromide(EDB)were detected <br /> in the groundwater from well MW-1. The groundwater from well <br /> of benzene,toluene and xylenes. The MW-3 contained]ower concentrations ; <br /> xy groundwater from wells MW-2 and MW-3 contained 1,2-DCA <br /> Up to 20 ppb. The groundwater collected on September 1989 from well MW-2 contained benzene at <br /> just above the detection Limit of 0.1 ppb. Fuel hydrocarbons were not detected in the groundwater from <br /> well MW-4. <br /> Groundwater elevations, based on depth-to-water measurements taken by WGR staff on 29 <br /> _ September 1989, indicate a south to inthwest groundwater flow direction. There are 7 California <br /> Department of Water Resources registered water wells and one abandoned gas well within aone-half <br /> mile radius of the site. <br /> Fr <br /> V <br /> 066RIN09 <br /> .pet. <br /> 111111511"P!111111 <br />