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GROtNb ZERO ANALYSIS, INC. <br /> 1714 Main Street <br /> Ewalon, CaUtornia 95320-1927 <br /> Telephone: (209)838-9888 <br /> Faesim0e: CM)838-9883 <br /> July 2, 1998 <br /> Mr. Wm. J. Hunter <br /> Wm. J. Hunter& Associates <br /> 2220 Loma Vista Drive <br /> Sacramento, CA 95825 <br /> Subject: Did to Perform Environmental Assessment Work <br /> 8200 N. Highway 99, Stockton, California <br /> Dear Mr. Hunter: <br /> Ground Zero Analysis, Inc. (Ground Zero) is pleased to provide this bid as you requested in your <br /> June 3, 1998 letter. Ground Zero has included descriptions for Projects 1 and 3 below and <br /> estimated costs in Exhibit A. <br /> BMW 1:_ Domesfig y=Well <br /> Based on information presented in Historical Ground Water Levels in San Joaquin County (April <br /> 1990) by Department of Water Resources (DWR), there is one well (18E01) located approximately <br /> 1,000 feet south-southwest of the subject site. According to the Flood Control and Water <br /> Conservation District (FCWCD), the most recent depth to water of 60.8 feet was measured in <br /> March 1998. Therefore, the depth to water in the domestic well located at the subject site is <br /> estimated to be approximately 60 feet. The depth to water will be measured prior to collectirfg <br /> water samples. <br /> Water samples will be collected through a sample port on the well head. The samples will be <br /> submitted to a state-certified laboratory and analyzed for total and coliform bacteria using <br /> appropriate EPA or SW methods, and volatile organic compounds (VOCs) using EPA method <br /> 524.2. The VOC analyses will be expanded to report gasoline oxygenate additives (EPA 8260 <br /> equivalent). <br /> In order to determine the casing size, depth, and screened interval(s) of the onsite well, a well <br /> receptor survey will be completed at DWR and San Joaquin County Public Health Services <br /> Environmental Health Division (PHS/EHD) for wells within 2,000 feet of the subject site. If no <br /> information is available regarding construction of the onsite well, it may be necessary to remove the <br /> pump hardware and piping to obtain a video log of the well. However, it is difficult to estimate <br /> RECEIVED <br /> PTOp_tI%1i0lCT <br /> .1 U l 0 3 1998 <br /> HUNTER & ASSOC <br />