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TABLE 2 CUMULATIVE ANALYTICAL RESULTS -GROUNDWATER ..+ San Joaquin County Courthouse,222 E.Weber Avenue, Stockton,California OXYGENATES SAMPLE DATE ETHYL- LOCATION SAMPLED TPH-G BENZENE TOLUENE BENZENE XYLENES MTBE DIPS ETBE TAME TBAI 1,2-DCA MW-3 07/24/02 ND<50 ND<0.5 ND<0.5 ND10.5 ND<1 ND<0.5 ND10.5 ND<0.5 N0<05 ND<5 ND<0.5 11/25/02 ND<50 ND<0.5 ND<0.5 ND<0.5 ND<1 ND<0.5 ND<0.5 ND<0.5 1,10<0.5 ND<5 NA 02/19/03 ND<50 ND<0.5 ND<0.5 ND<0,5 ND<1 ND<0.5 ND<0.5 ND<0.5 N0<0.5 ND<5 ND<O 5 05/09/03 ND-50 ND<0 5 ND<0.5 ND<0,5 ND<1 ND<O 5 ND<0.5 ND<0.5 ND<0.5 ND<5 ND<0.5 09(12/03 ND<50 ND<0.5 ND<0.5 ND<0.5 ND<1 ND<0.5 ND<0.5 ND<0.5 ND<0.5 ND<5 ND<0.5 12/11103 ND<50 ND<0.5 ND<0.5 ND<0.5 ND<1 ND<0.5 ND<0.5 ND<0.5 ND<0.5 ND<5 ND<0.5 03/24104 ND<50 ND<0.5 ND<0.5 ND<0.5 ND<1 0.5 ND<0.5 ND<0.5 ND<0.5 ND<5 ND<0.5 w 06118/04 ND<50 ND<0.5 ND<0.5 ND<0,5 ND<1 4.2 ND<0.5 ND<0,5 ND<0,5 ND<5 ND<0.5 08/19/04 ND<50 ND<0.5 ND<0.5 ND<0.5 ND<1 5.9 ND<0.5 ND<0.5 ND<0.5 ND<5 ND<0.5 12/30/05 ND<50 ND<0.5 ND<0,5 ND<0.5 ND<1 6.7 N0<0,5 ND<0.5 ND<0,5 ND<5 ND<0.5 03/23/05 ND<50 N0<0.5 ND<0.5 ND<O.5 ND<1 6.0 ND<0.5 ND<0.5 ND<0.5 ND<5 ND<0.5 �+ 06129105 ND<50 ND<O,5 ND<0,5 ND<0.5 ND<1 5.7 ND<0.5 ND<0.5 ND<05 ND<5 ND<0.5 09/21/05 ND<50 ND<0.5 ND<0,5 ND10.5 ND<l 4.2 ND<0.5 ND<0.5 ND<0.5 ND15 ND<0 5 12/30105 ND<50 ND<0.5 ND<0.5 ND<0.5 ND<1 2.8 ND<QS ND<0.5 ND<0 5 ND<5 ND<0.5 03/15/06 ND<50 ND<0.5 ND<0.5 ND10.5 ND<1 1.7 ND<0.5 N1010.5 ND<0.5 ND<5 ND<0.5 �.+ 06/21106 ND<50 ND<0.5 ND<0.5 ND<0.5 ND<1 1.5 ND<0,5 ND<0.5 ND<0.5 ND<5 ND<0 5 09/18/06 ND<50 N010.5 ND<0.5 ND<0.5 ND<1 1.2 ND<0.5 ND<0.5 ND<0.5 ND<5 ND<0.5 12/13/06 ND<50 ND<0.5 ND<0.5 ND<0.5 ND<1 0.6 ND<0.5 ND<0,5 ND<0.5 ND<5 ND<0.5 03/01107 j N0150 ND<0.5 ND<0.5 ND<0.5 ND<1 0.9 ND<0.5 N010.5 ND<0.5 ND<5 ND<D.5 W 06/12/07 ND<50 ND<0.5 N0<0.5 ND<0.5 ND<1 1.0 ND<05 ND<0.5 ND<0.5 ND<5 N0<05 09/27/07 ND<50 ND<0.5 ND<0.5 ND<0.5 ND<7 1.3 ND<0.5 ND<0.5 ND<0,5 ND<5 ND<0.5 12/11/07 ND<50 ND<0.5 ND<0.5 ND<0.5 ND<1 1.0 ND<0.5 ND<0.5 ND<0.5 ND<5 NO<O5 03/21/08 ND<50 ND<0.5 ND<0.5 ND10.5 ND<1 1.3 ND<05 ND<0.5 ND<0.5 ND<5 ND<0,5 r 06/30108 ND150 ND<0.5 ND<0.5 ND<Ob ND<1 ND<0.5 ND<0,5 ND<0.5 ND<0.5 ND<5 ND<05 08/28/08 40<50 ND<0 5 ND<0.5 ND<0 5 ND<1 0.6 ND<0.5 N0<0,5 ND<0.5 ND<5 ND<O 5 NOTES: All results are reported in micrograms per liter(ug/1),which translates to parts per billion(ppb) Total Petroleum Hydrocarbons as Gasoline(TPH-G)and benzene,toluene,ethylbenzene,xylenes(STEX)analyzed by EPA Method 802018015M or 8260B ti Oxygenates: methyl-t-butyl ether(MTBE),di-isopropyl ether(DIPE),ethyl-t-butyl ether(ETRE),tert-amyl methyl ether(TAME)and tert-butanol(TBA) analyzed by EPA Method 82608. 1,2-dichloroethane(1,2-DCA)also analyzed by EPA Method 8260B ND<50=Not Detected at reporting limit of 50 ppb NA =Not analyzed for specified compound 4 v i.r ar it 2of2