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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 DIPE ETBE TAM1E_j TBA 1,2-DCA B-1 02/03/01 120 24 ND<0 5 62 1 5 68 ND<0 5 ND<O 5 ND<0 5 ND<5 NA B-2 02/03/01 36,000 1,700 4,600 1,400 5,900 25 ND<5 ND<5 ND<5 ND<50 NA B-3 02103101 ND<50 ND<O 5 ND<O 5 ND<O 5 ND10 5 ND<O 5 ND<O 5 ND<0 5 ND<0 5 ND<5 NA MW-1 07/24/02 27,000 1,800 4,300 1,600 5,200 45 ND<5 ND<5 ND<5 ND<50 ND<s 11125/02 25,000 1,000 2,400 1,200 3,700 19 ND<O 5 ND<O 5 ND<O 5 ND<5 NA 02119103 18,000 1,200 1,300 1,000 3,200 ND<5 ND<5 ND<5 ND<5 ND<50 ND<5 MW-2 07/24/02 ND<50 ND<0 5 ND<O 5 ND<O 5 ND<1 ND<O 5 ND<O 5 ND<O 5 ND<O 5 ND<5 ND<0 5 11/25/02 ND<50 ND<0 5 ND<O 5 N0<0 5 ND<1 ND<O 5 ND<O 5 ND<O 5 ND<O 5 ND<5 NA ND 02/19/03 <50 ND<O 5 ND<O 5 ND<O 5 ND<1 ND<0 5 ND<0 5 ND<O 5 ND<O 5 ND<5 ND<0 5 rMW-3 07124102 ND<50 N0<05 ND<O 5 ND<0 5 ND<1 ND<O 5 ND<O 5 ND<O 5 ND<O 5 ND<5 ND<0 5 11/25/02 ND<50 ND<O 5 ND<0 5 ND<O 5 ND<1 ND<O 5 ND<0 5 ND<O 5 ND<0 5 ND<5 NA 02/19/03 ND<50 ND<O 5 ND<O 5 ND<O 5 ND<1 ND<O 5 ND<O 5 ND<0 5 ND<O 5 ND<5 ND<0 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(BTEX)analyzed by EPA Method 8020/8015M or 8260B Oxygenates methyl-t-butyl ether(MTBE) di-isopropyl ether(DIPE) ethyl-t-butyl ether(ETBE) tert-amyl methyl ether(TAME)and tert butanol(TBA)analyzed by EPA Method 8260B 1 2-dichloroethane(1 2-DCA)analyzed by EPA Method 8260B ND<50=Not Detected at reporting limit of 50 ppb NA =Not analyzed for specified compound