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TABLE 3 CUMULATIVE ANALYTICAL RESULTS - GROUNDWATER San Joaquin County Motor Pool, 1810 East HazeIton Avenue Stockton, California SAMPLE I DATE I LLOCATION SAMPLED OXYGENATES TPH-D TPH-G BENZENE TOLUENE ETHYL- BENZENE XYLENES MTBE D1PE I ETBE TAME TBA 1,2-DC I MW-4 12/19/03 NA ND-SO NDO 5 ND<0 5 ND<0 5 ND-1 0 5 ND<0 5 ND-0 5 ND-OS 24 ND<0 5 03/24/04 NA ND<50 11 ND<0 5 ND-US ND-1 0 5 ND-US ND<0 5 ND-Us 21 ND<0 5 li 06/09/04 NA ND-50 11 ND<0 5 ND<0 5 ND-1 07 NID<0 5 ND-05 ND-OS ND<5 ND-OS 08/23/04 NA ND<50 NII,0 5 ND<0 5 ND-OS ND<1 11 ND<0 5 ND-05 ND-05 ND-5 ND-OS 12/2 9104 NA ND<50 ND-OS ND-OS ND<0 5 ND<1 1 5 ND-05 ND-O5 ND<0 5 15 ND<0 5 ii 0 3/23/05 NA ND<50 ND-O5 ND-0 5 NO-0 5 ND-1 1 2 ND<0 5 ND<0 5 ND<0 5 ND<5 ND<0 5 11 MW-5 1 2/19/03 NA NID-50 NID<0 5 ND.<0 5 — ND-OS ND-1 ND-5 ND-5 ND<5 NO-5 ND<50 i — ND<5 03/24/04 NA ND-50 NO-0 5 ND<0 5 ND<0 5 ND<1 ND<0 5 ND<0 5 ND<0 5 ND-US ND<5 NO-0 5 II 06/09/04 NA ND-50 ND-OS ND-o5 ND-US ND-1 ND-OS ND<0 5 ND<0 5 ND<0 5 ND<5 NO<0 5 , 08/23/04 NA ND-50 ND-05 ND-O S ND<1 ND-OS ND-0 5 ND-OS ND-OS ND-0 5 12 810-05 12/29/04 NA ND-50 ND-OS ND-OS ND-OS ND-1 ND<0 5 ND-OS ND.° 5 ND-OS ND<5 81I3,0 5 03/23/05 NA ND-50 i i ND-OS ND<0 5 N0,0 5 ND-OS NIET<1 Nit-OS ND-OS 810<0 5 ND<5 _ ND<0 5 il MW-6 12/19/03 NA 7,800 2,100 ND<50 810<50 820 ND<5 ND-5 ND<5 ND<5 ND-50 810<5 03/24/04 NA 9,300 1,600 ND-20 ND<20 540 ND-OS ND-05 ND-OS ND-OS ND<5 810u05 06/09104 NA 5,600 630 ND<20 810<20 81 810-0 5 810-0 5 810<0 5 N10-.0 5 ND<5 ND-OS 11 08/23/04 NA 3,400 180 810,10 ND-10 29 810-5 ND-5 ND<5 ND<5 ND<50 ND<5 12/29/04 NA 3,800 40 810<10 810<10 ND<20 ND-OS ND-05 ND-OS 810<0 5 ND-5 ND-OS _ 03/23/05 NA 1,400 16 ND-OS 1 1 6 NE)<0 5 ND<0 5 ND<0 5 ND<0 5 ND<5 ND-OS 03/23/05 NA I ND<50 ND<0 5 ND-OS N E)<0 5 ND<1 0 7 , ND-0 5 t NE)<0 5 ND-0 5 1 ND-5 ND-OS illir-7 WELL 12/28/01 NA 810<50 ND<0 5 ND-OS ND-OS ND-OS , NO-O 5 x_ ND<C) 5 NC-OS ND-0 5 ND-5 ND-OS All results are reported in micrograms per liter (u9/1) which translates to parts per billion (ppb) Total Petroleum Hydrocarbons as Diesel (TPH-0) analyzed by EPA Method 8015M Total Petroleum Hydrocarbons as Gasoline (TPH G) benzene toluene ethylbenzene xylenes by EPA Method 820013 or 8020/8015M Oxygenates Methyl-t-butyl ether (MTBE) Di-isopropyl ether (DIPE) Ethyl-t-butyl ether (ETBE) Tent amyl methyl ether (TAME) and Tert-Butanol (IBA) by EPA 82606 1 2 Oichloroetnane (1 2 ()CA) analyzed by EPA Method 82606 ND-OS = Not Detecied at reporting limit of OS ppb NA = Not analyzed for specified compound NOTES 2 of 2