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HI 0GEOL <br /> APR 17 2003 A GROUNDWATER CONSULTANCY <br /> ENVIRORMENT HEALTH <br /> PERMIT/SERVICES <br /> Mr Sam Savig April 15, 2003 <br /> Local Oversight Program <br /> San Joaquin County <br /> Department of Health Services +� <br /> P.O Box 2009 <br /> Stockton, CA 95201 <br /> RE First Quarter, 2003 Groundwater Monitoring Report- Underground Storage Case <br /> Former Cheapen #37, 15 Grant Line Road,Tracy, San Joaquin County <br /> Dear Mr. Savig, <br /> This First Quarter, 2003 Groundwater Monitoring Report is submitted by H20GEOL on <br /> behalf of The Customer Company for the former Cheapen Store#37, 15 Grant Line <br /> Road in Tracy, San Joaquin County, California. The site location is shown on Figure 1 <br /> and is now a Bonfair Market,having been More for Less #37 m the interim. The First <br /> •� Quarter, 2003 groundwater monitoring event occurred on February 17, 2003. This is the <br /> first quarterly monitoring report since site activities were put in abeyance pending receipt <br /> of a Letter of Commitment from the Underground Storage Tank Cleanup Fund. <br /> 1.0 POTENTIOMETRIC SURFACE <br /> Depth to water in each monitoring well was measured to +/- 0 01 feet using a Solmst <br /> Model water level meter between 09:18 and 09.27 on February 17, 2003 The depths to <br /> water were converted to potentiometric surface elevation by subtracting the measured <br /> depths to water from the casing top elevations derived from the well survey performed in <br /> 1995 by Benchmark Consultants. The depth to water, casing top elevations, and <br /> potentiometnc surface elevations are presented in Table 1. All available previous water <br /> level measurements are summarized in Table C1 in Attachment C. <br /> Figure 2 is a map showing the approximate potentiometric surface for the monitoring <br /> wells at the site on February 17, 2003. Table 2 lists the slope (gradient) and direction of <br /> gradient of the potentiometric surface for each of the triangles with a well at each apex. <br /> The site average gradient of the potentiometric surface was 0.0016 feet per foot. The site <br /> average gradient direction was oriented N 10 31E. <br /> All available previous potentiometric surface slope (gradient) and direction of gradient <br /> mformation are summarized in Table C2 in Attachment C. <br /> P 0 Box 2165 ■ Livermore,California 94551-2165 ■ (925)373-9211 <br />