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TABLE 1 Groundwater Elevation and Analytical Data ARCO Service Station No.2186 3212 North California Street,Stockton,California TOC Static Water[1] Screen Groundwater Ethyl- Total Well Sample Elevation Level Interval Elevation Groundwater TPHg Benzene Toluene benzene Xylenes MtBE[3] Sample No. Date ft msl ftbs ftbs ft msi Flow Direction p p P91L Observations MW-2 9/25/1995 15.49 59.01 55.5-74.5 -43.52 SE <50 <0.5 <0.5 <0.5 2.0 NA No FP,No S 10/23/1995 NM NM --- NA NA NA NA NA NA Not observed 12/22/1995 54.76 -39.27 E <50 <0.5 <0.5 <0.5 <0.5 NA No FP,No S 2/16/1996 51.16 -35.67 E <50 <0.5 <0.5 <0.5 <0.5 NA No FP,No S 5/23/1996 46.28 -30.79 E <50 <0.5 <0.5 <0.5 <0.5 NA No FP,No S 9/19/1996 54.53 -39.04 NE <50 <0.5 <0.5 <0.5 <0.5 <3.0 No FP,No S 11/27/1996 51.67 -36.18 SE <50 <0.5 <0.5 <0.5 <0.5 <3.0 No FP,No 3/21/1997 43.16 -27.67 SE <50 <0.5 <0.5 <0.5 <0.5 <3.0 No FP,No 5/22/1997 44.81 -29.32 E-NE <50 <0.5 <0.5 <0.5 <0.5 <3.0 No FP,No S 8/20/1997 50.71 -35.22 E-NE <50 <0.5 <0.5 <0.5 <0.5 <3.0 No FP,No S 11/20/1997 50.17 -34.68 E <50 <0.5 <0.5 <0.5 <0.5 <5.0 No FP,No S 2/17/1998 45.30 -29.81 E-SE <50 <0.5 <0.5 <0.5 <0.5 <5.0 No FP,No S 6/24/1998 36.69 -21.20 E <50 <0.5 <0.5 <0.5 <0.5 <5.0 No FP,No S 9/21/1998 40.31 -24.82 E-NE <50 <0.5 <0.5 <0.5 <0.5 <5.0 No FP,No S 12/14/1998 38.28 -22.79 E-NE <50 <0.5 <0.5 <0.5 <0.5 <5.0 No FP,No 5 3/31/1999 35.24 -19.75 N-NE <50 <0.5 0.781 <0.5 <0.5 <5.0 No FP,No S 6/11/1999 35.14 -19.65 E-NE <50 <0.5 <0.5 <0.5 0.796 <5.0 No FP,No S 9/10/1999 39.37 -23.88 E-NE <50 <0.5 <0.5 <0.5 <0.5 <5.0 No FP,No S 12/3/1999 39.33 -23.84 E <50 <0.5 <0.5 <0.5 <0.5 <2.5 No FP,No S 4/3/2000 35.90 -20.41 NE <50 <0.5 <0.5 <0.5 <0.5 <2.5 No FP,No S 6/22/2000 36.08 -20.59 E <50 <2.0 <2.0 <2.0 2.16 <2.0[4] No FP,No S 9/27/2000 41.38 -25.89 E-NE <50 <0.5 <0.5 <0.5 <0.5 <2.0[4] No FP,No S 10/19/2000 41.20 -25.71 E-NE NA NA NA NA NA NA Not observed 12/20/2000 39.23 -23.74 E-NE <50 <0.5 <0.5 <0.5 <0.5 <2.5 No FP,No S 3/16/2001 38.14 -22.65 E-NE <50 <0.5 <0.5 <0.5 <0.5 <2.0[4] No FP,No 6/21/2001 40.94 -25.45 NE <50 <0.5 <0.5 <0.5 <0.5 <2.0[4] No FP,No 9/13/2001 46.69 -31.20 E-NE <50 <0.5 <0.5 <0.5 <0.5 <2.0[4] No FP,No S 12/11/2001 44.00 -28.51 NE <50 <0.50 <0.50 <0.50 <0.50 2.2[4] No FP,No S 3/14/2002 40.90 -25.41 E-NE <50 <0.50 <0.50 <0.50 <0.50 1.9[4] No FP,No S 6/19/2002 43.11 -27.62 E-NE <50 <0.50 <0.50 <0.50 <0.50 2.0[4] No FP,No S 9/12/2002 50.15 -34.66 E-NE <50 <0.5 <0.5 <0.5 <0.5 <0.5 No FP,No S 12/3/2002 47.17 -31.68 E-NE <50 0.64 0.54 0.81 2.5 0.68 No FP,No S 3/11/2003 47.01 -31.52 NE <50 <0.5 <0.5 <0.5 <0.5 0.57 No FP,No S 6/9/2003 44.36 -28.87 E-NE <50 <0.5 <0.5 <0.5 <0.5 <0.5 No FP,No S 9/16/2003 52.15 -36.66 NE <50 <0.5 <0.5 <0.5 <0.5 <0.5 No FP,No S 12/11/2003 46.84 -31.35 NE-SW <50 0.85 <0.5 <0.5 0.64 0.57 No FP,No S KAW ProcessV5 8P ARC05021860uarter"QTR Mi 86 GWMR 4CQ3 Page 2 of 8