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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 PI Elevation Water Elevation TPHg TPHd Benzene Toluene benzene Xylenes MtBE DO
<br /> Number Sampled NP (feet msl) (feet bgs) (feet msl) (pg1L) (pglL) (pglL] W/L) (I,g/L) {1rg1L) (lig/L) (mg1L) Comments
<br /> MW-5 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 1 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 /> 3/3111999 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 /> 12113/1999 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 /> 6/1912001 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 D.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 /> 1210812D03 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 -19.80 150 - <0.50 <0.50 <0.50 <0.50 <0.50[2] 3.36
<br /> 06111/2004 1 PL 9.37 1 29.83 -20.46 <50 -- <0.50 <0.50 <0.50 <0.50 <0.50[2] 2.9
<br /> MW-6 2/15/1995 - 8.95 40.02 -31.07 <50 -- <0,5 <0.5 <0.5 <0.5 NA - No FP,No S, No O,[58]
<br /> 5/12/1995 - 8.95 38.26 -29.31 <50 - <0.5 <0.5 <0.5 <0.5 NA -- No FP,No S, No O,[58]
<br /> 8/29/1995 -- 8.95 39.91 -30.96 '<52 -- <0.5 <0.5 <0.5 <0.5 NA - No FP,No S, No O,[59]
<br /> 12/4/1995 - 8.95 38.38 -29.43 `<70 -- <0.5 <0.5 <0.5 <0.5 NA - No FP,No S, No O,[58]
<br /> 2/2/1996 - 8.95 36.38 -27.43 <50 - <0,5 <0.5 <0.5 <0.5 NA -- No FP,No S,No O
<br /> 5/10/1996 8.95 33.88 -24.93 <50 -- <0,5 <0.5 <0.5 <0.5 <3 - No FP,No S,No
<br /> Report Date:July 26,2004 Page 6 of 15
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