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• <br /> EI Dorado Environmental, Inc. <br /> 2221 Goldorado Trail, EI Dorado, California 95623 (916) 626-3898 <br /> Fax (916) 626-3899 <br /> ♦ ) r q <br /> November 10, 1997 (/_ C <br /> Mr Kenneth Earnest <br /> Senior Project Manager <br /> Ultramar Inc <br /> 525 West Third Street <br /> Hanford, California 93230 <br /> i <br /> Subject Third Quarter 1997 Ground Water Monitoring Report <br /> Beacon Station #419 <br /> 2350 Waterloo Road, Stockton, California <br />• Dear Mr Earnest <br /> El Dorado Environmental, Inc (EDE) has prepared this report to document the results of quarterly <br /> ground water monitoring conducted on September 22, 1997 at the subject site (Figure 1) The <br /> monitoring, conducted by Doulos Environmental (Doulos), included measurements of depth to <br /> ground water, subjective analysis for the presence or absence of free product, ground water purging <br /> and collection of ground water samples Doulos reports that all field activities were conducted in <br /> accordance with the Ultramar Field Procedures described in Attachment A <br /> GROUND WATER ELEVATIONS <br /> Prior to purging, Doulos collected depth to ground water measurements Copies of Doulos' field <br /> data sheets are contained in Attachment B Ground water elevation data collected since July 1994 <br /> are summarized in Table 1 On the basis of the current measurements, the direction of ground water <br /> flow varies across the site from the southwest to the east (Figure 2) at a gradient of approximately <br /> 0 02 foot per foot Ground water elevations have decreased an average of 5 72 feet compared to the <br /> last monitoring event <br />