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1 <br /> H ® GEOL o RECEYED <br /> A GROUND WATER CONSULTANCY NOV 0 6 Z003 <br /> ENVIRONMENT HEALTH <br /> PERMIT/SERVICES <br /> Ms. Vicki McCartney October 31, 2003 <br /> Local Oversight Program <br /> San Joaquin County <br /> Environmental Health Department <br /> 304 East Weber Avenue, Third Floor <br /> Stockton, CA 95202-2708 <br /> RE Third Quarter, 2003 Groundwater Monitoring Report - Underground Storage <br /> Case Former Cheapen #37, 15 Grant Line Road, Tracy, San Joaquin County <br /> Dear Ms McCartney, <br /> This Third Quarter, 2003 Groundwater Monitoring Report is submitted by H20GEOL on <br /> behalf of The Customer Company for the former Cheaper' 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 a More for Less store in the interum. The <br /> -Th id- Second Quarter, 2003 groundwater monitoring event occurred on September 19, 23, and <br /> ^la 24, 2003 <br /> 10 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 07 27 and 07 39 on September 19, 2003 The depths to <br /> water were converted to potentiometnc 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 September 19, 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 potentiometnc surface was 0 0025 feet per foot The site <br /> average gradient direction was oriented N 7 8°w vyy`%?J0µ r <br /> All available previous potentiometric surface slope (gradient)and direction of gradient <br /> information are summarized in Table C2 in Attachment C <br /> i <br /> P 0 Box 2165 ■ Livermore,California 94551-2165 0 (925)373-9211 <br />