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! a ! Table 1 - C-Sparge System Pilot Test Groundwater Chemical Analytical Data Former Unocal Service Station#0187 437 East Miner Avenue Stockton,Cahforma Sample DO TPHg Benzene Toluene Ethylbenzene Xylenes MtBE Well ID Date (ppm) (ppb) (ppb) (ppb) (ppb) (ppb) _ (ppb) NP-1-111(con't) 12/19/00 527 180 34 069 <0 50 21 3 3 12/26/00 386 800 250 <0 500 <0 500 <0 500 <2 50 01/02/01 --- 116 355 <0 500 <0 500 <0 500 <2 50 01/09/01 708 <50 0 <0 500 <0 500 <0 500 <0 500 <2 50 01/16/01 414 <50 0 <0 500 <0 500 <0 500 <0 500 <5 00 01/23/01 424 <50 0 <0 500 <0 500 <0 500 <0 500 <2 50 01/30/01 276 <50 0 <0 500 <0 500 <0 500 <0 500 <2 50 02/06/01 344 <50 0 <0 500 <0 500 <0 500 <0 500 <2 50 02/13/01 430 <50 0 <0 500 <0 500 <0 500 <0 500 <2 50 02/21/01 404 <50 0 <0 500 <0 500 <0 500 <0 500 <2 50 2/26-27/011" ---- <50 0 <0 500 <0 500 <0 500 <0 500 <2 50/<2 0133 03/06/01 482 <50 0 <0 500 <0 500 <0 500 <0 500 <2 50 03/13/01 329 <50 0 <0 500 <0 500 <0 500 <0 500 <2 50 03/27/01 3 76 <50 0 <0 500 <0 500 <0 500 <0 500 <2 50 04/10/01 432 <50 0 <0 500 <0 500 <0 500 <0 500 <2 50 04/24/01 550 <50 0 <0 500 <0 500 <0 500 <0 500 <2 50 05/08/01 497 <50 0 <0 500 <0 500 <0 500 <0 500 <2 50 5114-16/011'1 ---- <50 0 <0 500 0 654 <0 500 122 <5 00/<2 00131 05/22/01 222 <50 0 <0 500 <0 500 <0 500 948 <2 50 06/05/01 ---- <50 <0 50 <0 50 <0 50 <0 50 <2 5 06/19/01 3 82 <50 <0 50 <0 50 <0 50 <0 50 <2 5 07/03/01 400 <50 <0 50 <0 50 <0 50 <0 50 <2 5 07/17/01 356 <500 <5 0 <5 0 <5 0 <5 0 47 07/31/01 ---- <50 <0 50 <0 50 <0 50 <0 50 <2 5 08/13-15/003 ---- <50 <0 50 11 <0 50 16 <50/<2 013 11126-28/01['] ---- <50 <0 50 15 053 2 7 <5 0/<] 0131 02/25-27/021`1 -- <50 073 14 067 2 7 <5 01<1 0t31 05/07-09/021'3 ---- <50 <0 50 <0 50 <0 50 <0 50 <5 0/<1 0131 240042 11-2 5