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Geological Technics inc Page 4 <br /> Groundwater Momtortng Report <br /> Project No 662 2 <br /> July 7,2005 <br /> With additional analyses for new wells MW-5, MW-6 and EW-2 <br /> ' • Total Petroleum Hydrocarbons as Diesel (TPH-D) by EPA method 8015(M) <br /> • Oxygenated Fuel Compounds DIPE, ETBE& TAME by EPA method 8260 <br /> • 1,2 DCA and EDB by EPA method 8260 <br /> ' • Methanol by EPA method 8015(M) <br /> • Lead by method 6010B <br /> The detection limits for the above analyses are listed in Table 3 of Appendix A while the lab <br /> ' analytical results are presented in Appendix B <br /> ' As required under AB2886, the groundwater elevation & laboratory data were submitted <br /> electronically to GeoTracker on July 5, 2005 (confirmation # 1609257340 & 4144752204) <br /> 2.0 FINDINGS AND DISCUSSION <br /> ' In accordance with SJC/EHD's January 31, 2005 facsimile correspondence, the <br /> groundwater analytical protocol was modified for this event <br /> Wells MW 1, MW-2, MW-3 and MW-104 were analyzed for TPH-G, BTEX, MTBE and for <br /> the remaining two quarters of 2005 these wells will be sampled for TPH-G, BTEX and MTBE <br /> ' only These wells will be analyzed far TBA, Ethanol and 1,2 DCA constituents on an annual <br /> basis in the first quarter <br /> ' New wells MW-5, MW 6 and EW-2 were analyzed for TPH-G, TPH-D, BTEX, MTBE, <br /> ETRE, DIPE, TAME, TBA, Methanol, Ethanol, EDB, Lead and 1,2 DCA The TPH-D, <br /> Methanol, Ethanol, EDB, and 1,2 DCA analyses will be discontinued since they have been <br /> ' non-detect for two consecutive events Lead analyses will be continued in well MW-5 and <br /> MW-6 until they test negative for two consecutive events The remaining protocols will <br /> match those above Any constituent detected above the laboratory reporting limit will be <br /> ' maintained in the quarterly analytical scheme <br /> The results of the groundwater sample analyses indicate the following <br /> ' Shallow Aquifer <br /> • Well MW-1 contained the gasoline oxygenate MTBE at 1300 [.g/I This well has <br /> ' consistently contained MTBE The well also contained 351 ug/1 TPH-G This is the <br /> second consecutive event in which TPH-G was detected in the well above the laboratory <br /> reporting limit <br /> ' • Well MW-2, which is upgradient of the former USTs, has not contained contaminant <br /> concentrations above the laboratory detection limits for all quarterly events completed <br /> thus far in the investigation <br />