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Table 9 C-Sparge System Pilot Test Groundwater Chemical Analytical Data Former Unocal Service Station #0187 437 East Miner Avenue, Stockton Sample DO TPHg Benzene Toluene Ethylbenzene Xylenes MTBE Well ID Date (PPM) (Ppb) (Ppb) (Ppb) (Ppb) (Ppb) (Ppb) NP-2-60 08/16/04 -- 1200 210 34 9.1 28 <1.0i31 09/23/04 - 370 43 2.40 0.97 14 -- 10/22/04 -- 270 24 7.4 1.2 14 -- 11/18/04 -- 1,100 170 29 8.7 32 X0.50 12/29/04 -- 310 19 5.3 3.1 26 -- NP-2-1 16 -NP-2-116 11120-22100 ---- 211i23 24.5 3.13 1.19 2.24 <5.001<2.00131 12/07/00 ---- 126121 16.6 0.601 0.594 <0.500 -- Baseline 12/08/00 2.11 170 22 0.66 0.63 <0.50 14 12/19/00 3.52 100 18 <1.0 <1.0 <1.0 5.8 12/26/00 4.25 118 15.2 <0.500 <0.500 <0.500 <2.50 01/02/01 ---- 189 20.8 0.543 <0.500 <0.500 <2.50 01/09/01 2.19 114 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 02126-27101 ---- 142 28.1 0.955 1.07 0.892 <2.501<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 4.82 121 <5.00/<2.0013i Q5114-16101 ---- 175 47.0 2.44 2.82 2.88 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 06940-325 11 ENSR Corporation