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<br /> Table 1
<br /> Groundwater Elevation and Analytical Data
<br /> ARCO Service Station No. 548
<br /> 1612 W. Hammer Lane, Stockton, CA
<br /> TOC Depth to Water Level Ethyl- Total
<br /> Well Date P/ Elevation Water Elevation TPHg TPHd Benzene Toluene benzene Xylenes MtBE DO
<br /> Number Sampled NP (feet msl) (feet bgs) (feet msi) (pg/L) (Irg/L) (pg/L) (pg/L) (pg1L) (pg/L) (pg/L) (mg/L) Comments
<br /> AS-1 08/03/2004 P - 31.71 470 56 <2.5 5.8 32 120[2] 3.6
<br /> 12/22/2004 P -- 31.09 -- 330 -- 15 <2.5 <2.5 <2.5 150[2] 5.5
<br /> 03/29/2005 P 28.81 - 200 9.2 <2.5 <2.5 <2.5 110[2] 2.43
<br /> 06/16/2005 P - 28.02 250 21 <1.0 3.3 6.4 100[2] 0.69
<br /> 109109/20051 P 1 30.21 1 450 - 41 1 <1.0 5.4 10 1211[2] 0.41
<br /> AS-2 08/03/2004 P 31.74 -- 1,600 4.8 5.6 36 38 2.8[2] 1.6
<br /> 12/22/2004 P -- 31.57 -- 5,000 -- 17 35 140 530 4.3[2] 5.5
<br /> 03/29/2005 P 29.09 - 3,500 - 15 27 110 410 3.1[2] 1.45
<br /> 06/16/2005 P 28.45 -- 4,700 - 21 34 130 540 3.9[2] 0.51
<br /> 09!09/2005 P - 30.64 - 5,200 - 15 17 110 320 4.9[2] 0.28
<br /> AS-3 08/03/2004 P -- 31.83 84 0.70 <0.50 2.0 1.4 0.80[2] 1.6
<br /> 12/22/2004 P 31.44 -- 190 0.62 <0.50 1.8 0.96 0.70[2] 4.1
<br /> 03/29/2005 P - 28.95 140 <0.50 <0.50 1.7 0.99 0.65[2] 2.05
<br /> 06/16/2005 P -- 28.38 -- 120 0.53 <0.50 2.4 1.6 0.57[2] 1.53
<br /> 09/09/2005 P - 30.53 - 220 - 0.85 <0.50 3.5 1.5 0.94[2] 0.87
<br /> MW-1 2/15/1995 10.36 41.19 -30.83 59 2.1 2-5 1 3.3 NA -- No FP,No S,No 0, [56]
<br /> 5/12/1995 10.36 39.33 -28.97 84 4.7 4.1 1.7 6.5 NA No FP,No S,Yes O,[56]
<br /> 8/29/1995 10.36 40.89 -30.53 190 8 5.8 4.7 18 NA No FP,No S,Yes O,[56]
<br /> 12/4/1995 10.36 39.53 -29.17 78 2.3 1-4 1.4 5.3 NA - No FP, No S,Yes O,[56]
<br /> 2/2/1996 - 10.36 37.57 -27.21 59 3.4 1.5 1.5 4.9 NA No FP, No S,No O
<br /> 5/10/1996 - 10.36 35.04 -24.68 92 - 5.5 2.1 2.4 12 <3 - No FP, No S,No O, [56]
<br /> 8/29/1996 -- 10.36 36.77 -26.41 100 4.2 1-4 3.2 12 <3 No FP, No S,No O, [56]
<br /> 11/20/1996 - 10.36 35.75 -25.39 140 -- 6 1.5 4.6 18 <3 No FP,No S,No O, [56]
<br /> 3/19/1997 -- 10.36 32.02 -21.66 230 11 2.2 6.4 20 <3 No FP,No S,No O, [56]
<br /> 5/27/1997 -- 10.36 32.27 -21.91 300 18 1-6 10 25 <3 No FP,No S,No O, [56]
<br /> 8/12/1997 -- 10.36 33.64 -23.28 110 7 0.75 4.8 9.6 <5 No FP,No S,No O, [55]
<br /> 11/18/1997 10.36 33.38 -23.02 180 15 1.3 10 14 <5 No FP,No S,No O, [56]
<br /> 2/16/1998 10.36 30.03 -19.67 <50 1.9 2-8 0.74 2.7 <5 No FP,No S,Yes O,[57]
<br /> 6/23/1998 P 10.36 27.48 -17.12 103 4.58 0.581 3.17 1.46 <5 No FP,No S,No O, [56]
<br /> 9/29/1998 P 10.36 29-25 -18.89 151 12.4 <0.5 8.07 2.38 <5 No FP,No S,Yes O,[55]
<br /> 12/30/1998 P 10.36 27.02 -16.66 61.9 3.72 <0.5 1.42 10.5 <5 - No FP,No S, No 0,[55]
<br /> 3/31/1999 P 10.36 25.63 -15.27 <50 1.43 <0.5 0.662 <0.5 <5 No FP, No S,No 0,[55]
<br /> Report Date:/November 17,2005 Pagel of f7
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