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1.2 Groundwater Contour Map and Flow Gradient A groundwater contour slap to a known datum was prepared for the data listed In Table 1 (see Figure 1) Groundwater levels appeared to decline slightly since the last quarter The groundwater flow direction was northerly under a calculated gradient of 0 003 that is consistent with historic observed trends 1.3 Chemical Analytical Methods and Results Eight groundwater samples were analyzed using EPA Methods 5030/8015, and 8260 for Total Petroleum Hydrocarbons as Gasoline (TPHG), Benzene, Toluene, Ethylbenzene and Xylene (BTEX) and fuel oxygenates including Methyl-tert-butyl-ether (MTBE), Tert-Butyl Alcohol (TBA), Di-Isopropyl Ether (DIPE), Ethyl tert-butyl ether (ETBE), Tert-Amyl Methyl Ether TAME) The analytical results of the groundwater samples for this sampling event are attached and listed below in Table 1 (and Figures 2, 3 and 4, and historic data is presented in attached historic sampling data spreadsheet Table 2) Table 1. Groundwater Chemical Data(September 14,2005) !� Sample TPHG Ben Tol Ethyl Xyl MTBE TBA DIPE ETBE TAME 11 /1 URA UPA URA URA uAA ugA UgA uaAu MW-1 ND ND ND ND ND ND ND ND ND ND MW-2 2000 ND 13 17 51 ND ND ND ND ND MW-3R ND ND ND ND ND ND ND ND ND ND MW-4 ND ND ND ND ND ND ND ND ND ND MW-5 ND ND ND ND ND ND ND ND ND ND MW-6 290 ND ND ND ND ND ND ND ND ND MW-7 ND ND ND ND ND ND ND ND ND ND MW-8 ND ND ND ND ND ND ND ND ND ND MW-911 250 ND ND ND ND ND ND ND ND ND Equip ND ND ND ND ND ND ND ND ND ND Blank Lab ND ND ND ND ND ND ND ND ND ND Blanks ND-None detected ug/l-micrograms per liter Ben-Benzene Tal-Toluene Xyl-Xylene NA—No analysis Fuel Ox -Fuel Oxygenates by Method 8260 from Dec, 1997 forward Ethyl-Ethylbenzene 1,2 Dicbloroethane and Ethylene Dibrormde ND in alt wells,these analyses discontinued in 2000 See lustone data table for previous momtonng well sampling results Wells MW-3 and 9 were replaced in Oct 2004, re- designated MW-3R and MW-9R respectively Page 2 of 4