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EI Dorado Environmental, Inc. <br /> 2221 Goldorado Trail, EI Dorado, California 95623916 <br /> ( )626-3898 <br /> Fax (916) 626-3899 <br /> August 30, 1997 <br /> SEP - 5 1997 <br /> ENVIRONMENTAL HEALTH <br /> Mr Kenneth Earnest PERMIT/SERVICES <br /> Senior Project Manager <br /> Ultramar Inc <br /> 525 West Third Street <br /> Hanford, California 93230 <br /> Subject Second Quarter 1997 Ground Water Monitoring Report <br /> Beacon Station 4419 <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 June 30, 1997 at the subject site (Figure 1) The monitoring, <br /> conducted by Doulos Environmental (Doulos), included measurements of depth to ground water, <br /> subjective analysis for the presence or absence of free product, ground water purging and collection <br /> of ground water samples Doulos reports that all field activities were conducted in accordance with <br /> 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 3 18 feet compared to the <br /> last monitoring event <br />