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EI Dorado Environmental, Inc. <br /> 2221 Goldorado Trail, El Dorado, California 95623 (916) 626-3898 <br /> Fax (916) 626-3899 <br /> December 17, 1996 <br /> t - <br /> Mr. Kenneth Earnest .w.� <br /> Environmental Specialist -- <br /> Ultramar Inc. <br /> 525 West Third Street <br /> Hanford, California 93232-0466 <br /> Subject: Third Quarter 1996 Ground Water Monitoring Report <br /> Beacon Station 4474 <br /> 3440 East Main Avenue, Stockton, California <br /> Dear Mr. Stephenson: <br /> El Dorado Environmental, Inc. (EDE) has prepared this report to document the results of quarterly <br /> ground water monitoring conducted on September 20, 1996 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 December <br /> 1993 are summarized in Table 1. On the basis of the current measurements, ground water flows <br /> toward the south-southeas (Figure 2) at a gradient of less than 0.01 foot per foot. Ground water <br /> levels in monitoring wells MW-1 through MW-3 have decrease an average of 0.37 feet compared <br /> to the last monitoring event. <br />