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• 2 GROUNDWATER MONITORING On behalf of PSC, ETIC performed the fourth quarterly groundwater-monitoring event on November 9, 2005 The data are presented in the following sections Summary tables for groundwater elevations and analytical results are included as attached Tables 1 through 4 Site maps for groundwater elevations and analytical results are included as attached Figures 1 through 4 Field data sheets are included in Appendix A Laboratory analytical reports are included in Appendix B 1 2.1 Groundwater Monitoring Procedures Groundwater elevations were obtained from four monitoring wells MW-1 1 through MW-4 Groundwater levels and the potential presence of free phase gasoline product were measured in each well prior to sampling utilizing an electronic oil/water interface probe Groundwater samples were collected and submitted for analysis from the following wells MW-1, MW-2, MW-3, and MW-4 Prior to sample collection and if possible, the wells were purged a minimum of three well-casing volumes with a dedicated Waterra sampling system in order to collect a representative sample Water quality parameters of the purged water (pH, conductivity, temperature, and the visual observation of water clarity) were measured utilizing field instruments The purged water ' was stored in a 55-gallon drum and the drum was transported to a PSC licensed waste disposal facility Upon purging the appropriate volume of groundwater, sample aliquots were retrieved and placed in laboratory provided containers The containers were properly labeled, stored on ice in a cooler, and transported under chain-of- custody The samples were then submitted to STL, a California-certified laboratory located in Pleasanton, California Groundwater samples were analyzed for BTEX, TPH-g, and the oxygenate analytes (TBA, MTBE, DIPE, ETBE, and TAME) by EPA Method 8260B 2.2 Groundwater Elevation Measurements Free product was not observed in the wells, based on the measurements obtained utilizing the oil/water interface probe Groundwater elevations decreased approximately 168 feet from the previous event During this event, the average depth to groundwater in the wells was 28 44 feet bgs (-18 68 feet msl) The elevations ranged from —19 03 feet to 7 Quarterly Groundwater Monitoring Report 4th Quarter-November 2005 Prepared for SARA LEE BAKERY GRotlp,INC Prepared by PSC Environmental Services Instigative and Quarterly Report 14th Quarterly Report 112005 doe February 24 2006