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i i i Table 1 - C-Sparge System Pilot Test Groundwater Chemical Analytical Data Former Unocal Service Station#0187 437 East Miner Avenue Stockton, California Sample DO TPHg Benzene Toluene Ethylbenzene Xylenes MtBE Well ID Date m) b) (ppb) b) b) b) b) NP-2-116(con't) 01/02/01 ---- 189 20.8 0.543 <0.500 <0.500 <2.50 01/09/01 2.I9 114 19.9 <0.500 <0.500 <0.500 <2.50 01/16/01 3.17 103 24.6 <0.500 <0.500 <0.500 <5.00 01/23/01 2.83 90.8 19.8 <0.500 <0.500 0.544 <2.50 01/30/01 2.83 69.0 18.6 <0.500 <0.500 0.556 <2.50 02/06/01 3.57 78,900 <50.0 <50.0 <50.0 <50.0 <250 02/13/01 3.37 67.2 15.3 <0,500 <0.500 0.671 <2.50 02/21/01 2.51 <50.0 16.2 <0.500 <0.500 <0.500 <2.50 02/26-27/01 ---- 142 28.1 0.955 1.07 0,892 <2.50/<2.0[3] 03/06/01 3.59 <50.0 22.0 0.806 0.630 0.679 3.12 03/13/01 4.39 58.2 22.1 0.816 0.781 0.800 <2.50 03/27/01 4.92 77.8 24.3 1.13 1.21 1.76 6.09 04/10/01 3.56 76.1 25.8 <0.500 1,29 1.76 3.74 04/24/01 3.59 81.1 27.5 1.11 1.26 1.46 4.26 05/08/01 3.78 69.1 20.1 1.13 1.06 1.43 4.82 05114-16101 ---- 175121 47.0 2.44 2.82 2.88 <5.00/<2.00131 05/22/01 2.18 145 38.8 2.41 2.49 2.93 <2.50 06/05/01 ---- 79 33 1,2 1.10 1.1 <2.5 06/19/01 3.64 <50 23 1.3 1.0 1.3 <2.5 07/03/01 4.09 100 38 1.8 1.1 2.3 <5.0 07/17/01 4.33 <500 35 <5.0 <5.0 <5.0 <25 07/31/01 ---- 77 27 0.94 1.1 1.2 <2.5 08113-t5/011'1 - 1701�1 39 2.4 1.4 2.4 <5.0/<2.0131 11126-28/01t'l ---- 17012l 34 1.3 <0.50 1.3 <5.0/<1,0131 02125-27/0211 ---- 170121 28 0.60 <0.50 <0.50 <5.0/<10131 05/07-09/02f" -- 180121 12 2.6 0.58 1.6 <5,0/<1.0{31 08/12-14/02t'l ---- 220161 17 2.0 X0.50 Lt 9.2/<1.0t31 240042.11-3 12