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8260 The analyses were performed on an "normal" turnaround The results are attached <br /> • and presented in Table 2 below <br /> The sampler inadvertently marked the sample "MW-3"although the proper well designation <br /> is MW-1, Wright will correct this discrepancy during the next quarterly sampling <br /> Table 2. Monitoring Well Groundwater Chemical Data <br /> Sample Date GW TPHG Benz Tol Ethyly A MTBEA 2- <br /> Elev * DCA <br /> ft <br /> # u u u u u u UP uzn- <br /> 97217M205 2 N D i D ND ND ND ND <br /> 3� <br /> Blank I I LND INDINUINDI ND IND I ND I NO I NIJ I R-0 ND �N3D <br /> #-See Iaboratory reports GW Elev -Groundwater elevation in feet <br /> @ -The sample was inadvertently marked "MW-Y however the monitoring well designation is Mw-L <br /> * - Hydrocarbon reported in the gasoline range does not match the gasoline standard <br /> Discussion <br /> Groundwater Gradient Piottmg <br /> PHS EHD recommended reviewing site files for two locations just north of Tracy Auto <br /> Stereo, the Gemelos Property at 2421 Holly Street and More for Less Gas and Muumarket <br /> • (More for Less, former Cheaper Gas) at 15 Grantline Road These sites currently have <br /> groundwater monitoring wells on site Since only one monitoring well would be installed <br /> for Tracy Auto Stereo, it would be of use for the sites to share groundwater measurement <br /> data and tie the new well casing elevation to the existing site surveys In this way, Wright <br /> could use depth to groundwater information at the other sites, and provide groundwater <br /> contour flow information tied to other existing well arrays (see Figure 1) <br /> Water level data was collected from the wells on November 8, 2000 The data are plotted <br /> on Figure I The groundwater flow gradient is flowing north-northeasterly at a calculated <br /> gradient of 0 0015 <br /> A remediation groundwater cleanup pumping system has been installed at More for Less in <br /> 1993 and pumping apparently was performed at More for Less Well MW-4 (see Parker <br /> report) A groundwater pumping map from February, 2000 indicates the system was <br /> pumping and all monitoring wells reported contaminants not detected at that time It was <br /> unclear whether the system is currently operating which could influence groundwater flow <br /> to the northeast <br /> Only three monitoring wells have been installed at the Gemelos Property (see Advanced <br /> GeoEnvironmental, Inc report) The current status of cleanup and monitoring is <br /> unknown, although Wright assumes that both sites are continuing with quarterly <br /> monitoring <br /> Field Samphng Data <br /> A capillary soil sample was not retrieved for analysis due to poor sample recovery <br /> Previous capillary soil sampling results in borehole B-3 showed that contaminants were not <br /> detected(see Wright report dated April 21, 2000) The MW-1 groundwater data show that <br /> Page 4 <br />