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Chevron Environmental Management Company Page 3 <br /> Chevron Station 9-3232 8660 Lower Sacramento Road Stockton California Janua 17 2003 <br /> documented in GR's Second Quarter Event of Apri124 and 25 2002 and May 14, <br /> • 2002, dated June 21, 2002 (Attachment E) <br /> • Slug Testing. On November 1, 2001, slug tests were performed in wells MW-1, <br /> MW-2, and MW-3 Slug insertion and removal tests were conducted in the wells by <br /> creating a near instantaneous change in water level by inserting or removing a PVC <br /> "slug"in the well The hydraulic response was recorded using an automated <br /> pressure transducer, containing an internal data logger(MmiTroll") until the water <br /> equilibrated to its pre-test level or until sufficient data was obtained for analysis <br /> The hydraulic conductivity ranged from 0 20 to 2 75 feet per day(ft/d)with a <br /> calculated geometric mean of approximately 123 ft/d The transmissivity was <br /> calculated by multiplying the hydraulic conductivity by the effective thickness of <br /> the saturated interval in each well as evaluated from the geologic logs and depth to <br /> groundwater level measurements The transmissivity ranged from 2 30 to 31 63 <br /> square feet per day(ft2/day) with a calculated geometric mean of approximately <br /> 15 85 ft2/day Slug test results are presented in Table 2 Slug test data plats are <br /> included in Attachment F <br /> If there are any questions regarding this report,please contact Brian Silva of SECOR at <br /> 916-861-0400 extension 240, or Robert (Bob) Cochran of Chevron at 925-842-9655 <br /> SINCERELY, <br /> SECOR INTERNATIONAL INCORPORATED <br /> r <br /> Eliz tenhuis Brian Silva <br /> Staff Scientist Project Manager <br /> 1 IChevron1932321REPORTSI9-3232 2-4-02 MW SA doc <br />