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El Dorado Environmental, Inc. <br /> • 2227 Goidorado Trail EI Dorado, CalEfornia 95623 (916) 826-3$98 <br /> Fax (916) 626-3899 <br /> July 18, 1997 <br /> Mr. Kenneth Earnest <br /> Senior Project Manager , Q� <br /> Ultramar Inc. <br /> 525 West Third Street <br /> Hanford, California 93230 <br /> Subject: Second Quarter 1997 Ground Water Monitoring Report <br /> Beacon Station 4474 <br /> i3440 East Main Avenue, 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 13, 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 December <br /> 1993 are summarized in Table 1. On the basis of the current measurements, ground water flows <br /> toward the south-southeast (Figure 2) at a gradient of less than 0.01 foot per foot. Ground water <br /> elevations have increased an average of 1.02 feet compared to the last monitoring event. - - <br /> • <br />