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Table 3-3 C-Sparger Area Groundwater Monitoring Data and Analytical Results Former Unocal Service Station No. 0187 437 East Miner Avenue Stockton, California Product WELL 101 DATE DTW S.I. GWE Thickness TPHg B T E X MTBE TOC'(ft.) (ft.) (ft.bgs) (MSI) (l1'•) (u /L) (ug/L) (ug/L) (ug/L) (ug/L) (ug/L) U-4 08/12-14/02 27.57 -15.85 0.00 <50 <0.50 0.91 <0.50 1.3 <2.5/<1.04 (cont) 11105-06/02 28.65 -16.93 0.00 <50 <0.50 <0.50 <0.50 <0.50 <2.5/<2.04 02/04-06/03 28.53 -16.81 0.00 <50 <0.50 <0.50 <0.50 <0.50 <2.0/<2.04 05/27-30/03 28.39 -16.67 0.00 <50 <0.50 <0.50 <0.50 <0.50 <2.0/<0.504 08/26-29/03 29.73 -18.01 0.00 <50 <0.50 <0.50 <0.50 <0.50 <2.0/<0.50` 11/29/03 35.30 -23.58 0.00 <50 <0.50 <0.50 <0.50 <1.00 <0.504 02/16-18/04 29.80 -18.08 0.00 <50 1.8 <0.50 <0.50 <1.0 <0.504 04/19/04 29.14 -17.42 0.00 <50 1.1 1.1 1.4 5.3 <0.504 08/16/04 30.59 -18.87 0.00 <50 1.8 <0.50 0.57 2.7 <0.504 11/15/04 31.20 -19.48 0.00 <50 <0.50 <0.50 <0.50 <1.0 <0.504 02/14/05 30.18 -18.46 0.00 <50 <0.50 0.90 <0.50 1.1 <1.04 05109-1112005 28.99 -17.27 0.00 <50 <0.50 <0.50 <0.50 <1.0 <0.504 08/08-10105 29.03 -17.31 0.00 <50 <0.50 <0.50 <0.50 <1.0 <0.504 U-5 12.58 08/09/95 42.80 -- -30.22 0.00 -- -- 11/08/95 42.49 -29.91 0.00 <50 <0.5 0.53 <0.5 <0.5 02/06/96 41.05 -28.47 0.00 <50 <0.5 <0.5 <0.5 <0.5 05/07/96 38.03 -25.45 0.00 <50 <0.5 <0.5 <0.5 <0.5 08/06/96 37.69 -25.11 0.00 <50 <0.5 <0.5 <0.5 <0.5 11/05/96 37.53 -24.95 0.00 <50 <0.5 <0.5 <0.5 <0.5 -- 02/03/97 34.13 -21.55 0.00 <50 <0.5 <0.5 <0.5 <0.5 <5.0 05/01/97 32.88 -20.30 0.00 <50 <0.5 <0.5 <0.5 <0.5 <5.0 08/04/97 33.09 -20.51 0.00 <50 <0.5 <0.5 <0.5 <0.5 <5.0 11/03/97 34.12 -21.54 0.00 <50 <0.5 <0.5 <0.5 <0.5 <5.0 02/13/98 31.79 -19.21 0.00 <50 <0.50 <0.50 <0.50 <0.50 <2.5 03/09/98 30.63 -18.05 0.00 <50 <0.50 <0.50 <0.50 <0.50 <2.5/<2.04 05/26/98 28.19 -15.61 0.00 <50 <0.50 <0.50 <0.50 <0.50 <2.5 08/17/98 27.14 -14.56 0.00 <50 <0.50 <0.50 <0.50 <0.50 <2.5 06940-325 7 of 39 302005