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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 msl) (Ng/L) U g/L) Ug/L) (pg/L) (ug/L) (pg/L) (PVL) (mg/L) Comments
<br /> MW-5 3/19/1997 9.37 31.12 -21.75 6,200 420 68 360 590 "'<60 No FP,No S,No O,[60]
<br /> 5/27/1997 9.37 31.19 -21.82 4,500 490 59 230 350 97 No FP,No 6,Yes O
<br /> 8/12/1997 9.37 32.76 -23.39 3,600 260 12 260 350 110 -- No FP,No S, No O,[60]
<br /> 11/18/1997 -- 9.37 32.49 -23.12 1,300 180 12 18 88 '<25 No FP,No S,Yes O,[61]
<br /> 2/16/1998 9.37 29.14 -19.77 630 110 <2.5 22 8.3 44 -- No FP,No S,Yes O,
<br /> [61.5]
<br /> 6/23/1998 P 9.37 26.61 -17.24 702 50.4 7.91 33.3 36.6 47.3 No FP,No S,No O, [60]
<br /> 9/29/1998 P 9.37 28.39 -19.02 1,790 242 <5 121 135 145 No FP,No S,No O, [60]
<br /> 12/30/1998 P 9.37 26.22 -16.85 275 19 <0.5 6.05 0.629 38.2 No FP,No S,No O, [60]
<br /> 3/31/1999 P 9.37 24.71 -15.34 93.4 8.42 <0.5 <0.5 0.835 15.7 No FP, No S,No O,[60]
<br /> 6/28/1999 P 9.37 25.88 -16.51 175 22.4 <0.5 1.15 2.03 32.8 No FP, No S,No O,[60]
<br /> 9/10/1999 P 9.37 27.87 -18.50 614 41.9 <0.5 10.9 29.3 93.6 No FP, No S,No O,[60]
<br /> 12/13/1999 P 9.37 26.92 -17.55 <50 <0.5 <0.5 <0.5 <0.5 7.52 No FP,No S, No O,[60]
<br /> 3/28/2000 P 9.37 23.74 -14.37 <50 <0.5 <0.5 <0.5 <0.5 <2.5 No FP,No S, No O,[60]
<br /> 6/26/2000 P 9.37 24.71 -15.34 106 1.99 <0.5 <0.5 <0.5 42[2] - No FP,No S,No O,[61]
<br /> 9/28/2000 P 9.37 27.24 -17.87 137 -- <0.5 <0.5 <0.5 <0.5 47.4 -- No FP,No S,No O
<br /> 12/18/2000 P 9.37 25.87 -16.50 <50 <0.5 <0.5 <0.5 <0.5 <2[2] No FP,No S,No O
<br /> 3/14/2001 P 9.37 24.48 -15.11 <50 <0.5 <0.5 <0.5 <0.5 <1.0 No FP,No S,Yes O
<br /> 6/19/2001 P 9.37 25.43 -16.06 <50 <0.5 <0.5 <0.5 <0.5 <2[2] No FP,No S,Yes O
<br /> 9/11/2001 P 9.37 27.95 -18.58 <50 <0.5 <0.5 <0.5 <0.5 <2[2] - No FP,No S,Yes O
<br /> 12/13/2001 P 9.37 27.20 -17.83 <50 -- <0.50 <0.50 <0.50 <0.50 <0.50[2] No FP, No S,Yes O
<br /> 3/12/2002 P 9.37 25.53 -16.16 <50 -- <0.50 <0.50 <0.50 <0.50 0.98[2] -- No FP,No S,Yes O
<br /> 6/17/2002 P 9.37 26-53 -17.16 <50 -- <0.50 <0.50 <0.50 <0.50 <0.50[2] No FP,No S,Yes O
<br /> 9/9/2002 P 9.37 29.38 -20.01 <50 <0.5 <0.5 <0.5 <0.5 <0.5 - No FP,No S,Yes O
<br /> 12/4/2002 P 9.37 29.14 -19.77 <50 <0.5 0.62 <0.5 3.4 <0.5 No FP,No S,Yes O
<br /> 03/03/2003 P 9.37 28.91 -19.54 <50 <0.50 <0.50 <0.50 <0.50 <0.50[2] 1.99
<br /> 06/03/2003 P 9.37 28.67 -19.30 <50 <0.50 <0.50 <0.50 <0.50 <0.50[2] 5.48
<br /> 09/18/2003 P 9.37 32.08 -22.71 <50 <0.50 <0.50 <0.50 <0.50 <0.50[2] 1.21
<br /> 12/08/2003 P 9.37 31.93 -22.56 <50 <0.50 <0.50 <0.50 <0.50 <0.50[2]
<br /> 03/11/2004 P 9.37 29.17 -19.80 <50 <0.50 <0.50 <0.50 <0.50 <0.50[2] 3.36
<br /> 06/11/2004 P 9.37 29.83 -20.46 <50 <0.50 <0.50 <0.50 <0.50 <0.50[2] 2.9
<br /> 08/03/2004 P 9.37 31.25 -21.88 <50 <0.50 <0.50 <0.50 <0.50 1.1(2] 4.0
<br /> 12/22/2004 P 9.37 30.51 -21.14 <50 <0.50 <0.50 <0.50 <0.50 <0.50[2] 4.1
<br /> Report Date:November 17,20405 Page 7 of 17
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