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t <br /> ►-A GE6Gf/51E'lIIS 4191-E Power Inn Road, Sacramento, CA 95826 (916)452- <br /> 2901 <br /> FREMONT •COSTA MESA e SACRAMENTO e <br /> HOUSTON <br /> PRELIMINARY ASSESSMENT REPORT <br /> EVALUATION OF SOIL ARID <br /> GROUND-WATER CONTAAINATSON <br /> at <br /> Former UNOCAL Service Station No. 2859 <br /> 1655 Pacific Avenue <br /> Stockton, California <br /> For <br /> UNOCAL Corporation <br /> INTRODUCTION <br /> E�; J <br /> At the regt.Cst of UNOCAL Corporation, Applied GeoSystems <br /> conducted a subsurface environmental investigation to evaluate <br /> the degree of hydrocarbon contamination in the soil and ground <br /> water at the above-referenced site. The property is located on <br /> the southwest corner of the intersection of Pacific Avenue and <br /> Walnut Street in Stockton, California. The site location is <br /> shown on the Site Vicinitv Map (Plate P-l) . <br /> The investigation included drilling three soil borings, <br /> installing ground-water monitoring wells in the borings, <br /> collecting and analyzing soil and ground-water samples at the <br /> site, compiling a ground-water potentiometric surface map, and <br /> E <br /> interpreting the collected data to evaluate whether the presence <br />