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k <br /> 1�1 <br /> April 28, 1988 AGS Job No. 038012-1 <br /> Former UNOCAL Service Station, Stockton, California <br /> ANALYTICAL RESUL'T'S <br /> The samples collected below the former gasoline tanks were tested <br /> for TPH by EPA Method 8015 (modified) and BETX by EPA Method 8020 <br /> at Applied GeoSystems' analytical laboratory in Fremont, <br /> California. The laboratory is certified by the State of <br /> California to perform these analyses. <br /> Samples collected from beneath the former waste oil tank were <br /> also analyzed for polychlorinated biphenyls by Epp, Method 8080 <br /> and halogenated aromatic hydrocarbons by EPA Method 80 .0. These <br /> analyses were required by the SJLHD performed by CHEMWEST <br /> Analytical Laboratories of Sacramento, California. CHEN.wEST is <br /> ` certified by the State of California to perform the specified <br /> analyses. <br /> DISCUSSION <br /> Results of the soil analyses indicate that there was significant <br /> contamination by gasoline product of the soil directly beneath <br /> the former tanks. Laboratory analyses showed levels of total <br /> - ue ydrocaxbsns in samples from the <br /> gasoline tank pit thatare <br /> above allowable levels defined by the SJLHD. <br /> 8 <br /> Appi«ol Ge©Sy�t�� <br />