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TABLE 2 CUMULATIVE ANALYTICAL RESULTS-GROUNDWATER ' San Joaquin County Motor Pool, 1810 East Hazelton Avenue, Stockton,California OXYGENATES SAMPLE PATE ETHYL- LOCATION SAMPLED TPH-D TPH-G BENZENE TOLUENE BENZENE XYLENES MTBE DIPE ETRE TAME TBA 1,2-0CA EDB MW-4 12/19/03 NA ND<50 ND<05 ND<O5 ND<O5 ND<1 05 ND<O5 ND<O5 ND<05 24 ND<05 NA 03/24/04 NA ND<50 1 1 ND<O 5 ND<0 5 ND<1 05 ND<O 5 ND<O 5 ND<0 5 21 ND<0 5 NA 06/09/04 NA ND<50 1 1 NO<0 5 ND<O 5 ND41 07 ND<O 5 ND<O 5 ND<0 5 ND<5 ND<O 5 NA ' 081231D4 NA ND<50 No<05 ND<O5 ND<O5 ND<1 11 ND<O5 ND<O5 ND<O5 ND<5 ND<05 NA 12/29/04 NA ND<W ND<O 5 ND<O 5 ND<O 5 ND<1 is ND40 5 ND<O 5 ND<O 5 15 N040 5 NA 03/23/05 NA ND<W ND<o5 ND<05 ND<O5 ND<1 12 ND<05 ND<05 ND<O5 ND<5 ND<O5 NA 06/29/05 NA ND-W ND<O5 ND<05 ND<05 ND<1 13 1`40<06 ND<05 ND<O5 ND<5 NA NA 09/21/05 NA ND<50 ND<O5 ND<05 ND<O5 ND<1 22 ND<05 ND<05 ND<O5 ND<5 NA NA 12120!05 NA ND<50 ND<O 5 ND<0 5 ND<0 5 10 160 ND<O 5 ND<0 5 ND<0 5 ND<5 ND<D 5 ND<O 5 03/15106 NA ND<50 ND<O5 ND<05 ND<O5 ND<1 213 ND<05 ND<05 ND<O5 ND<5 ND<05 ND<o5 ' MW-5 12119103 NA ND<50 ND<05 ND<O5 ND<05 ND<1 N13<5 ND<5 ND<5 ND<5 N0<50 ND<5 NA 03124104 NA ND<50 ND<O5 ND<O5 ND<O5 ND<1 ND<O5 ND<05 ND<05 ND<O5 ND<5 ND<05 NA 06/09104 NA ND<50 ND<05 ND<O5 ND<05 ND<1 ND<O5 ND<05 ND<05 ND<O5 ND<5 ND<06 NA ' 08123104 NA ND<50 ND<O5 ND<O5 ND<05 ND<1 ND<o5 ND<O5 ND<O5 ND<O5 12 ND<05 NA 12129104 NA ND<50 ND<05 ND<05 ND<O5 ND<1 ND<05 ND<05 ND<05 ND<05 ND<5 ND<05 NA 03123105 NA ND<50 ND<O5 ND<05 ND<05 N00 ND<O5 ND<05 ND<05 ND<05 ND<5 ND<D5 NA 06129105 NA ND<50 ND<O5 ND<05 ND<O5 ND<1 ND<05 ND<O5 ND<05 ND<05 ND<5 NA NA ' 09121105 NA ND<50 ND<O5 ND<05 ND<O5 ND<1 ND<05 ND<O5 ND<05 ND<05 ND<5 NA NA 12120105 NA ND<50 ND<O5 ND<05 ND<05 ND<1 ND<05 ND<05 ND<05 ND<O5 ND<5 ND<O5 ND<O5 03115/06 NA ND<50 ND-05 ND<05 ND<05 ND<1 ND<05 ND<05 ND<05 ND<O5 ND<5 ND<05 ND<05 ' MW 6 12119103 NA 7,800 2,100 ND<50 ND<50 820 ND<5 ND<5 ND<5 ND<5 ND<50 ND<5 NA 03124104 NA 9,300 1600 ND<20 ND<20 540 ND<O5 ND<05 ND<05 ND<O5 ND<5 ND<O5 NA 06/09/04 NA 5,600 630 ND-20 ND<20 81 ND<O5 ND<05 ND<05 ND<05 ND<5 ND<O5 NA 08123/04 NA $400 180 ND<10 ND<10 29 ND15 ND<5 ND<5 ND<5 ND<50 ND<5 NA 12129104 NA 3,800 40 ND<10 ND<10 ND-20 ND<O5 ND<O5 ND<05 ND<05 ND<5 ND<O5 NA 03/23105 NA 1400 16 N0<05 11 6 ND<05 ND<05 ND<05 ND<05 ND<5 ND<05 NA 06129105 NA 760 181 ND<05 12 37 ND<O5 ND<05 ND<05 ND<05 ND<5 NA NA 09121!05 NA 602 108 ND<O 5 ND<O 5 33 ND<0 5 ND<O 5 110<0 5 ND<0 5 ND<5 NA NA 12/20/05 NA 440` 187 ND<0 5 07 47 ND<O 5 ND<O 5 ND<D 5 ND<O 5 374 ND<0 5 ND<O 5 03115!06 NA 386 106 ND<O 5 ND<0 5 44 ND<0 5 N0<0 5 ND<0 5 ND<O 5 ND<5 ND<0 5 06 MW-7 03123/05 NA ND<50 ND<05 ND<05 ND<O5 NDO 07 ND<05 ND<05 ND<05 ND<5 ND<O5 NA ' 06129/05 NA ND<50 ND<05 ND<05 ND<05 ND<1 ND<05 ND<05 ND<05 ND<05 ND<5 NA NA 09121/05 NA ND<50 ND<05 ND<O5 ND<O5 ND<1 ND<05 ND<05 ND<05 ND<05 ND<5 NA NA 12/20/05 NA ND<50 ND<05 N0<05 ND<O5 ND<1 ND<05 I40<05 ND<O5 ND<05 ND<5 ND<O5 ND<O5 ' 03115/06 NA ND<50 ND<05 ND<O5 ND<O5 ND<1 ND<05 ND<O5 ND<05 ND<05 ND<5 ND<O5 ND<05 CITY WELL 12128101 NA ND<50 ND<05 I ND<O5 ND<O5 ND<05 ND<05 ND<05 ND<05 ND<05 ND<5 ND<O5 NA NOTES All results are reported in micrograms per titer(ugA)which translates to parts per billion(ppb) Total Petroleum Hydrocarbons as Diesel(TPH D)anatyzed by I-PA Method 8015M Total Petroleum Hydrocarbons as Gasolme(TPH-G) benzene toluene ethylbenzene xylenes by EPA Method 82608 or 8020/8015M Oxygenates Methyl t butyl ether(MTBE) Di isopropyl ether(DIPE) Ethyl t-bW ether(ETBE) Tort amyl methyl ether(TAME)and Tart Butanol(TBA)by EPA 82608 1 2 Dichloroethane(1 2 DCA)and 1 2-dibromoethane(EDB)analyzed by EPA Method 82606 ND<0 5=Not Detected at reporting limit of 0 5 ppb NA=Not analyzed for speufied compound ' Sample chromatograph does not resemble fuel standard used for quantitation result is estimated 1 2of2