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DAMES & MOORE A PROFESSIONAL LIMITED PARTNERSHIr <br /> I320 EAST SHAW AVENUE SUITE 110, FRESNO, CALIFORNIA 93710 (209)222 7892 <br /> FAX(209)222 1937 <br /> November 12, 1990 <br /> The Customer Company <br /> 4457 Park Road <br /> Benicia, CA 94510 <br /> Attention: Mr.John Johnson <br /> Groundwater Sampling and Analyses <br /> Food & Liquor Store #76 <br /> 890 Main Street <br /> Manteca, California <br /> Project No 17161-046-044 <br /> Dear Mr Johnson- <br /> At the request of The Customer Company, Dames & Moore is presenting this letter <br /> report summarizing the methods and results of the groundwater monitoring we performed <br /> at the subject site. The site is situated at the southeast corner of Main Street and <br /> Jason Street in Manteca, California as is shown on the Site Vicinity Map, Plate 1. <br /> According to information supplied by The Customer Company, two underground <br /> gasoline storage tanks have been previously removed from the site and subsurface <br /> investigations have been conducted by J H. Kleinfelder of Sacramento, California <br /> Three 2-inch diameter groundwater monitoring wells (MW-1, MW-2 & MW-3) were installed <br /> as part of the Kleinfelder investigation. Groundwater samples were collected from the <br /> wells for laboratory analysis on March 3, 1987, April 28, 1987, and May 5, 1988. <br /> Hydrocarbon concentrations were detected by laboratory analysis of the initial samples <br /> collected from MW-1 and MW-2 Hydrocarbons were not detected by laboratory analysis <br /> of three groundwater samples collected during the two subsequent sampling events We <br />