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r <br /> v <br /> WEISS ASSOCIATES Consuliing in Geology E Geohydrology <br /> 2938 McClure Street, Oakland, CA 911609 <br /> 415-465.1100 <br /> t11,111 <br /> 28 March 1988 <br /> Ms. Kay Huffman <br /> Chevron USA <br /> 2 Annabel Lane, Suite 200 <br /> San Ramon, California 94583 <br /> Re: Chevron Facility #96465 <br /> Pershing Ave. and Robinhood Dr. <br /> Stockton, California <br /> WA Job #4-305 <br /> Dear Ms, Huffman: <br /> This report presents the findings of the subsurface investigation of <br /> the <br /> ast <br /> ner <br /> Chevrgn Service Station <br /> Drive, Stockton 65, located on Californiahe(Figurer1). The scopof e <br /> loC <br /> Avenue and <br /> work for this investigation was to: <br /> "• k, � <br /> 1. Revie:•7 the previous reports on the site. <br /> 2. Drill four soil borings to determine the extent of hydrocarbons in <br /> the subsurface. <br /> 3. Collect soil samples every 5 ft to determine the subsurface sediment <br /> and hydrogealogic characteristics and for passible chemical analysis. <br /> 4. Survey the sail samples in the field with a portable organic vapor <br /> analyzer (OVA) to determine the presence or absence of volatile <br /> 4 hydrocarbons in soil. <br /> 5. Select sail samples based on field observations for chemical <br /> analysis. Analyze the samples for total fuel hydrocarbons (TFl1C) by <br /> EPA Method 8015, gas chromatography/flame ionization detection <br /> (CC/FID). <br /> -inch-diameter ground water monitoring wells. <br /> 6. Complete the borings as 4 <br /> 7. Develop and sample the monitoring wells and analyze the ground water <br /> samples for TFHC by CC/FID and for BTX by EPA Method 602, gas <br /> chromatography/photoionization detection (GC/PID). <br /> A oiuision of A9Le7ierra AssociateIncorporated <br /> r <br />