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TABLE 1 <br /> HLSTORICAL GROUNDWATER DATA <br /> Fainter Discovery Chevrolet <br /> 1615 I JI*Street <br /> Tracy,California <br /> Wed.No.1 Date Total Depth to Groundwater Floating Chlorinated <br /> Elev.t Sampled Depth' Water' Elevation Product TPlag Benzene Toluene Elbylbenzene Xylenes MTBE TPHd O&G Halocarbolms <br /> ft. ft.) Ift.) (Ppb-) b) ( ) b) (p& ) (ppb) (ppbjb <br /> x Analvdcal Lobo <br /> TPHg = Total Petroleum Hydrocarbons as gasoline O&G = Oil and Grease American Environmental Network(FLAP 111172) <br /> TPHd = ToW Petroleum Hydrocarbons as diesel ppb = pans per billion Analytical hIgAads: <br /> BTEX = benzene, toluene,ethylbermtne,and total xylenes ft. = feet TPH$: EPA Methods 5030/8015 (GCFID) <br /> MTBE - methyl tert-butyl elber na = not analyzed TPHd: EPA Method 3510/8015 (GCFID) <br /> ad - none detected at or above laboratory reperdog limits ---- = not applicable BTEXIMTBE: EPA Method 8020 <br /> Oxygenates = t-butanol(TBA), methyl ten-butyl etber(MTBE), di-isopropyl ether(DiPE), O&G: Standard Method 5520 B&F <br /> ethyl-t-butyl ether(ETBE), and t amylmetbyl ether(TAME). Oxygenates; EPA Method 8260 <br /> 1 Measured from surveyed top of the north side of the well casing. Well casing elevations surveyed to MSL.by Virgil Chavez Land Surveying(PLS#6323). <br /> 2 Also analyzed for oxygenates by EPA Method 8260. None of the oxygenate compounds,including MTBE,were detected. <br /> 3 Also analyzed for oxygenates by EPA Method 8260. MTBE detected at a concentration of 6 ppb. MTBE repotted as not detected by EPA 8020. <br /> s Analysis for MTBE by EPA Method 8020 reported 8.0 ppb, Confirmation by EPA 8260 did not detect MTBE. <br /> s Analysis for MTBE by EPA Method 8020 repotted 12 ppb. Confirmation by EPA 8260 did not detect MTBE. <br /> Page 3 of 3 <br /> 9146.(M-5 <br />