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3 <br /> Z <br /> H20GEOLo 711 <br /> A CROUNO WATER CONSULTANCY C3 JUL _3 4N 11: 22 <br /> Ms. Vicki McCartney June 30, 2003 <br /> Local Oversight Program rp"� <br /> San Joaquin County <br /> Environmental Health Department tU A <br /> 304 East Weber Avenue, Third Floor <br /> Stockton, CA 95202-2708 �yy'�Z <br /> RE- Second Quarter, 2003 Groundwater Monitoring Report- Underground Storage <br /> Case Former Cheaper! #37, 15 Granit Line Road, Tracy, San Joaquin County <br /> Dear Ms McCartney; <br /> This Second Quarter, 2003 Groundwater Monitoring Report is submitted by H20GEOL <br /> on 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 interim. The <br /> • Second Quarter,2003 groundwater monitoring event occurred on May 31, 2003. / <br /> 1.0 POTENTIOMETRiC SURFACE <br /> Depth to water in each monitoring well was measured to +/- 0 01 feet using a Solinst <br /> Model water level meter between 09:34 and 09:40 on May 31, 2003. The depths to water <br /> were converted to potentiometric surface elevation by subtracting the measured depths to <br /> water from the casing top elevations derived from the well survey performed in 1995 by <br /> Benchmark Consultants. The depth to water,casing top elevations, and potentiometric <br /> surface elevations are presented in Table 1. All available previous water level <br /> measurements are summarized in Table C i in Attachment C <br /> Figure 2 is a map showing the approximate potentiometric surface for the monitoring <br /> wells at the site on May 31, 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 0025 feet per foot The site <br /> average gradient direction was oriented N 8.8°E. <br /> All available previous potentiometric surface slope (gradient) and direction of gradient <br /> information are summarized in Table C2 in Attachment C <br /> • <br /> P 0 Box 2165 ■ Livermore,California 94551-2165 ■ (925)373-9211 <br />