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depth) Beneath the B zone aquifer is stiff clay that extends from approximately 27 feet is bgs to 40 feet bgs The original five monitor wells did not encounter groundwater in the A zone aquifer when initially drilled and sampled Depth to water measurements taken between 1993 and February 1996 indicate that the A zone aquifer was dry (depth to water greater than 17 feet bgs) MW I through MW5 are screened across both the A and B zone aquifers Sometime after February 1996 depth to groundwater measurements indicated that groundwater was in contact with the A zone aquifer, see Table 1 and Figures 8 and 9 The groundwater in the vicinity of the site is semjconfined Groundwater elevation at the site vanes from a wet year high of 7 feet bgs (silty clay formation above the A zone) to about 22 - 23 feet bgs (B zone) during the previous drought period Groundwater flow direction in the A zone at the site has generally been to the west since December 1997 The B zone shows a similar flow direction, wluch would be expected due to the connection between zones at wells MW1 through MW5 2ND QUARTER 2002 SITE ACTIVITIES Groundwater samples were obtained from all wells associated with 1876 Country Club Blvd during this quarter (May 22, 2002) As requested by San Joaquin County Health, Advanced GeoEnvironmental, Inc (AGE) was notified prior to the sample date, but were unable to perform the sampling of wells at Country Club Food and Fuel, 1856 Country Club Boulevard AGE did grant WEGE permission to obtain depth to water measurements for their clients wells Figure 3 - Site Base Map has been expanded to show the relative positions of the Country Club Food and Fuel wells to the Sanchez Property wells Field notes from site monitoring and sampling can be found in Appendix A DEPTH TO WATER MEASUREMENTS Depth to water was measured at all wells on May 22, 2002 The measurements were made from the surveyed elevation at the top of casing at each well using an electrical air/water interface probe (Table 1) No free product or product sheen was observed in any of the monitor wells Table 1 also presents the Depth to Water measurements obtained from wells located at Country Club Food and Fuel Charts have been developed to show the elevation changes with time for Sanchez wells MW 1, MW2, MW3, MW4 and MWS, see Appendix B COLLECTION AND CERTIFIED ANALYSIS OF GROUNDWATER SAMPLES WEGE and Pittman Well Purging (PWP) personnel collected quarterly groundwater samples from the eleven monitor wells at the site on May 22, 2002 See Appendix A for QA/QC, details, methods, procedures, abbreviations, and acronyms used in sampling and . analysis 0 4 QM 2ND 2002