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EI Dorado Environmental, Inc. <br /> 2221 Goldorado Trail, EI Dorado, California 95623 (916)626-3898 <br /> Fax(9 16) 626-3899 <br /> JUN 17 1996 <br /> June 7, 1996 ENVIRONMENTAL HEALTH <br /> PERMITISERViCES <br /> Mr. Randall K. Stephenson <br /> Environmental Specialist <br /> Ultramar Inc. <br /> 525 West Third Street <br /> Hanford, California 93232-0466 <br /> Subject: First Quarter 1996 Ground Water Monitoring Report <br /> Beacon Station #474 <br /> 3440 East Main Avenue, Stockton, California <br /> Dear Mr. Stephenson: <br /> El Dorado Environmental, Inc. (EDE)has prepared this eport to document the results of quarterly <br /> ground water monitoring conducted on March 28, 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 cunt measurements, ground water flows <br /> toward the east (Figure 2) at a gradient of less than 0.01 foot per foot. Ground water levels have <br /> increased an average of 4.06 feet compared to the last monitoring event. <br />