Laserfiche WebLink
MV <br /> -- Chevron <br /> Chevron U.S.A. Inc. APR 1? �9�9 <br /> 2410 Camino Ramon, Sen Ramon, California • Phone (415) 642.9500 FiEP&TH <br /> Mail Address:P.U.Box 5904,Sen Ramon,CA 84563-0804 <br /> PERK <br /> Marketing Operations <br /> D. Moller <br /> Manx ar eretion$ 14 Apr 1989 <br /> B D P <br /> P <br /> S.L. Patterson <br /> Area Managar,Oparatians <br /> C.G,Trimbach <br /> Manager.Engineering <br /> Edward W.James <br /> California Regional Water Quality Control Board <br /> Central Valley Region <br /> 3443 Routier <br /> Sacramento,California 95827 <br /> Re: Chevron Service Station #94275 <br /> `2905 W.Benjamin Holt Drive_ <br /> Stockton,California <br /> Dear Mr.James: <br /> On behalf of Chevron U.S.A., Western;;Geologic Resources, Inc. (WGR) has prepared the <br /> cnclos�d letter report,dated 13April 1989,for the above referenced site, The purpose of the investigation <br /> was to delineate the extent of contamination in soil and groundwater at the site based on information <br /> concerning former underground tank locations and soil sampling conducted during removal of the tanks. <br /> As indicated in the reports; 5 soil borings B-1 through B-5 were completed as monitoring wells MW-1 <br /> through MW-5 by WGR between 27 February and 2 March 1989. Soil and groundwater samples were <br /> analyzed for total purgeable petroleum hydrocarbons(TPPH)and aromatic hydrocarbons. Soil collected <br /> from the boring adjacent to the former waste oil tank were analyzed for purgeable priority pollutants and <br /> oil and grease. All water samples were analyzed,for purgeable priority pollutants, oil and grease and <br /> cadmium, chromium,land and ziaa. <br /> The highest concentration of TPPH was detected in soil collected from-boring B-5 at the south west side <br /> of the site. TPPH were also detected in boring 13-1 on the south side of the site and in boring B-2 at the <br /> east side of the site, Benzene,toluene,total xylenes and ethylbenzene(BTXE)were also detected in soil <br /> collected from those three borings. Oil and grease were detected in soil collected from boring B•3. <br /> Groundwater collected from wells MWA,MW-2 and MW-5 contained TPPH and BTXE. The highest <br /> concentrations were detected in well MW-1. TPPH and BTXE were not detected in wells MW-3 and <br /> MW-4. In addition,1,2-dichioroethane and freon 113 were detected in weU MW-5. Oil and grease were <br /> not detected in any of the groundwater samples. <br />