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r■� rr� rr �r �r �r r� � � � rt r � r r � r � r� Table 1 Groundwater Elevation and Analytical Data ARCO Service Station No. 5450 1617 W. Fremont Street, Stockton, CA TOC Depth to Water Level Ethyl- Total Well Date P/ Elevation Water Elevation TPHg TPHd Benzene Toluene benzene Xylenes MtBE DO Number Sampled NP (feet msl) (feet bgs) (feet msl) (pg/L) (lag/L) (pg/L) (Vg/L) (pg/L) (Ng/L) (Vg/L) (mg/L) Comments MW-2 9/11/2002 P 8.67 11.37 -2.70 98 <0.50 <0.50 <0.50 <0.50 62 -- 11/27/2002 P 8.67 10.90 -2.23 <50 <0.50 <0.50 <0.50 <0.50 43 2.2 03/14/2003 P 8.67 10.60 -1.93 <50 <0.50 <0.50 <0.50 <0.50 28" 5.2 04/24/2003 P 8.67 10.72 -2.05 <50 <0.50 <0.50 <0.50 <0.50 30' 2.4 08/14/2003 P 8.67 11.30 -2.63 <50 <0.50 <0.50 <0.50 <0.50 18' 2.3 11/06/2003 P 8.67 11.68 -3.01 <50 <2.5 <2.5 <2.5 <2.5 36" 2.2 02/26/2004 P 8.67 10.62 -1.95 <50 <0.50 <0.50 <0.50 <0.50 19" 2.8 05/11/2004 P 8.67 12.80 -4.13 <50 <0.50 <0.50 <0.50 <0.50 4.2' -- 08/31/2004 P 8.67 11.46 -2.79 <50 -- <0.50 <0.50 <0.50 0.52 2.6' 1.4 11/22/2004 P 8.67 11.18 -2.51 <50 UJ <0.50 <0.50 <0.50 <0.50 21* 1.84 03/01/2005 P 8.67 9.14 -0.47 <50 UJ <0.50 <0.50 <0.50 <0.50 14` 1.8 05/05/2005 P 8.67 9.60 -0.93 <50 <0.50 <0.50 <0.50 <0.50 7.2" 4.0 09/09/2005 P 8.67 10.84 -2.17 <50 - <0-50 <0.50 <0.50 <0.50 12` 2.1 11/04/2005 P 8.67 10.26 -1.59 <50 - <0.50 <0.50 <0.50 <0.50 9.3' 1.1 MW-3 9/11/2002 P 8.77 11.35 -2.58 <50 <0.50 <0.50 <0.50 <0.50 0.77 -- 11/27/2002 P 8.77 11.17 -2.40 <50 <0.50 <0.50 <0.50 <0.50 <0.50 1.8 03/14/2003 P 8-77 10.48 -1.71 <50 <0.50 <0.50 <0.50 <0.50 <0.50' 0.5 04/24/2003 P 8.77 10.50 -1.73 <50 <0.50 <0.50 <0.50 <0.50 <0.50' 2.8 08/14/2003 P 8.77 11.23 -2.46 <50 <0.50 <0.50 <0.50 <0.50 <0-50' 2.1 11/06/2003 P 8.77 11.56 -2.79 <50 <0.50 <0.50 <0.50 <0.50 <0.50' 1.9 02/26/2004 P 8.77 9.45 -0.68 <50 - <0.50 <0.50 <0.50 <0.50 <0.50' 2.2 05/11/2004 P 8.77 10.73 -1.96 <50 <0.50 <0.50 <0.50 <0.50 <0.50' 3.0 08/31/2004 P 8.77 11.58 -2.81 <50 -- <0.50 <0.50 <0.50 <0.50 <0.50' 0.7 11/2212004 P 8.77 11.52 -2.75 <50 UJ <0.50 <0.50 <0.50 <0.50 <0.50' 1.94 03/01/2005 P 8.77 8.54 0.23 <50 UJ <0.50 <0.50 <0.50 <0.50 <0.50" 2.0 05/05/2005 P 8.77 9.40 -0.63 <50 - <0.50 <0.50 <0.50 <0.50 <0.50" 3.4 09/09/2005 P 8.77 10.83 -2.06 <50 <0.50 <0.50 <0.50 <0.50 <0.50" 1.4 11/04/2005 P 8.77 9.98 -1.21 <60 -- <0.50 <0.50 <0.50 <0.50 <0.50' 1.3 MW-4 9/11/2002 P 8.66 11.34 -2.68 <50 -- <0.50 <0.50 <0.50 <0.50 <0.50 -- 11/27/2002 P 8.66 11.19 -2.53 <50 <0.50 <0.50 <0.50 <0.50 <0.50 1.1 03/14/2003 P 8.66 10.60 -1.94 <50 <0.50 <0.50 <0.50 <0.50 0.69' 1.5 04/24/2003 P 8.66 10.77 -2.11 <50 - <0.50 <0.50 <0.50 <0.50 0.66` 2.7 Report Gate:December 19,2005 Pagel of 3