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1 TABLE 3 CUMULATIVE ANALYTICAL RESULTS -GROUNDWATER San Joaquin County Motor Pool, 1810 East Hazelton Avenue Stockton, California SAMPLE DATE OXYGENATES ETHYL- LOCATION SAMPLED TPH-D TPH-G IBENZ:]ENET:COLUENEI BENZENE XYLENES MTBE DIPE ETBE TAME I TBA 11,2-DC MW-4 L 12/19/03 NA ND150 I ND<O 5 ND<O 5 ND<0 5 ND<1 06 ND<O 5 ND<0 5 ND<O 5 24 ND<O 5 03/24/04 NA 11 ND<50 I 1 1 NDcO 5 ND<O 5 ND<1 05 ND<0 5 ND<O 5 ND<O 5 21 ND<0 5 06!09!04 NA ND<50 I 1 1 ND<O 5 ND<O 5 ND<1 07 ND<0 5 ND-0 5 NDcO 5 ND<5 ND<O 5 08/23/04 NA Np<50 ND<O 5END-0 5 ND<O 5 NDc1 11 ND<O 5 ND<O 5 ND<O 5 ND<5 ND<0 5 i2129104 NA ND<50 ND<O 5 ND<O 5 ND10 5 ND<1 15 ND<O 5 ND<O 5 I ND<0 5 1 15 1 ND<0 5 03/23/05 NA ND<50 140<0 5 ND<0 5 ND10 5 ND<1 12 ND<O 5 ND<O 5 ND<O 5 ND<5 ND<O 5 MW-5 12J19/03 NA ND<50 ND<0 5 ND<0 5 NDcO 5 NDc1 ND<5 ND<5 NDc5 ND<5 ND<W ND<5 03/24/04 NA ND<50 ND<0 5 ND<O 5 NDcO 5 ND<1 ND-0 5 NDcO 5 ND-0 5 ND<O 5 ND<5 ND<O 5 06/09/04 NA ND<50 ND<O 5 ND<O 5 ND10 5 ND 08/23/04 NA ND<50 ND<O 5 ND<O 5 ND<0 5 ND<1 ND<0 5 ND-0 5 ND<0 5 ND<O 5 12 ND<0 5 12129/04 NA NDc50 ND<0 5 ND<0 5 ND<O 5 ND<1 NDcO 5 ND<0 5 ND<0 5 ND,0 5 ND<5 ND<O 5 03!23/05 NA NDc50 ND<O 5 ND<O 5 ND,0 5 ND<1 ND-0 5 ND<O 5 ND10 5 ND<0 5 ND<5 NO MW-6 12/19/03 NA 7,800 2,100 ND<50 NDc50 820 ND<5 ND<5 Np<5 ND<5 NDcW ND<5 03/24!04 NA 9,300 1,600 NDc20 ND-20 540 ND<0 5 ND<O 5 ND-05 ND<O 5 ND<5 ND<O 5 06/09/04 NA 5,600 630 ND<20 ND<20 81 ND<O 5 ND<O 5 ND<O 5 ND10 5 ND<5 ND<O 5 08!23/04 NA 3,400 180 1 ND<iD I NDc10 29 ::] ND<5 ND<5 ND15t Dc5 ND<50 ND<5 12129104 NA 3,800 40 NDc10 ND<10 ND<20 ND<O 5 NDaO 5 ND<0 5 <0 5 NDc5 ND<O 5 03!23/05 NA 1,400 16 ND<O 5 1 1 fi ND<0 5 ND<0 5ND<05 <0 5 ND<5 ND<O 5 MW-7 03/23/05 NA ND<50 ND<0 5 ND<0 5 ND<0 5 NDci 0 7 ND<0 5 NDcO 5 ND<O 5 ND<5 ND<O 5 WELL 1212t3/0i NA ND<50 ND<O 5 Np<0 5 1 ND<0 5 ND<0 5 NDcO 5 ND<0 5 ND<O 5 ND<O 5 ND<,5 ND<O S NOTES All results are reported in micrograms per liter(ugll)which translates to parts per billion(ppb) Total Petroleum Hydrocarbons as Diesel(TPH-D)analyzed by EPA Method 6015M Total Petroleum Hydrocarbons as Gasoline(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-butyl ether(ETBE) Tert amyl methyl ether(TAME)and Tert-Butanol(TBA)by EPA 82608 1 2 Dichloroethane(1 2 DCA)analyzed by EPA Method 8260B ND<D 5=Not Detected at reporting limit of 0 5 ppb NA =Not analyzed for specified compound r • 2 of 2