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<br /> TABLE 1
<br /> Groundwater Elevation and Analytical Data
<br /> ARCO Service Station No.2186
<br /> 3212 North California Street,Stockton,California
<br /> TOC Static Water[l] Screen Groundwater Ethyl- Total
<br /> Well Sample Elevation Level Interval Elevation Groundwater TPHg Benzene Toluene benzene Xylenes MtBE[3]
<br /> Sample No. Date (ft MSI) __ (ft bgs) (ft bgs) (ft msl) Flow Direction pg/L pglL & L pg/L pg/L pg/L Observations
<br /> MW-4 11/20/1997 13.83 48.36 45-65 -34.53 E 89 1.0 1.1 0.63 2.0 11 No FP,No S
<br /> 2/17/1998 43.55 -29.72 E-SE 180 0.57 <0.5 <0.5 0.59 29 No FP,No S
<br /> 6/24/1998 35.06 -21.23 E <50 <0.5 <0.5 <0.5 <0.5 16.2 No FP,No S
<br /> 9/21/1998 38.67 -24.84 E-NE 131 <0.5 <0.5 1.15 1.67 26.2 No FP,No S
<br /> 12/14/1998 36.61 -22.78 E-NE 136 1.08 <0.5 <0.5 <0.5 29.1 No FP,No S
<br /> 3/31/1999 33.85 -20.02 N-NE <50 <0.5 <0.5 <0.5 <0.5 7.96 No FP,No S
<br /> 6/11/1999 33.47 -19.64 E-NE 194 <0.5 <0.5 <0.5 <0.5 41 No FP,No
<br /> 9/10/1999 37.72 -23.89 E-NE 213 1.48 <0.5 <0.5 <0.5 1,100 No FP,No
<br /> 12!311999 37.64 -23.81 E 64.1 <0.5 <0.5 <0.5 <0.5 731 No FP,No S
<br /> 4/3/2000 34.30 -20.47 NE <50 <0.5 <0.5 <0.5 <0.5 166 No FP,No S
<br /> 6/22/2000 34.37 -20.54 E 232 <2.0 <2.0 <2.0 <2.0 2,070[4] No FP,No S
<br /> 9/27/2000 39.80 -25.97 E-NE 185 1.60 <0.5 0.542 1.17 6,590[4] No FP,No S
<br /> 10/19/2000 39.59 -25.76 E-NE NA NA NA NA NA NA Not observed
<br /> 12/20/2000 37.68 -23.85 E-NE <50 <0.5 <0.5 <0.5 <0.5 1,170 No FP,No S
<br /> 3/16/2001 36.50 -22.67 E-NE <50 <0.5 <0.5 <0.5 <0.5 481[41 No FP,No S
<br /> 6/21/2001 39.37 -25.54 NE <50 <0.5 <0.5 <0.5 <0.5 590[4] No FP,No S
<br /> 9/13/2001 45.12 -31.29 E-NE 150 <0.5 <0.5 <0.5 <0.5 7,600[4] No FP,No S
<br /> 12/11/2001 42.43 -28.60 NE 84171 <0-50 <0.50 <0.50 <0.50 5,600[4] No FP,No S
<br /> 3/14/2002 39.26 -25.43 E-NE 88[71 <0.50 <0.50 <0.50 <0.50 4,900[4] No FP,No S
<br /> 6/19/2002 41.46 -27.63 E-NE 540[7] <0.50 <0.50 <0.50 <0.50 2,900[4] No FP,No S
<br /> 9/12/2002 48.62 -34.79 E-NE <50,000 <500 <500 <500 <500 16,000 No FP,No S
<br /> 12/3/2002 45.54 -31.71 E-NE <50,000 <500 <500 <500 <500 6,600 No FP,No S
<br /> 3/11/2003 45.78 -31.95 NE <25,000 <250 <250 <250 <250 4,200 No FP,No S
<br /> 6/9/2003 42.77 -28.94 E-NE <500 <5.0 <5.0 <5.0 <5.0 3,200 No FP,No S
<br /> 9/16/2003 50.64 -36.81 NE 2,700 R <250 <250 <250 <250 6,500 No FP,No
<br /> 12/11/2003 45.63 -31.80 NE-SW 3,000 R <50 <50 <50 <50 6,500 J No FP,No
<br /> MW-5 9/13/2001 12.76 45.13 -32.37 E-NE <50 <0.5 <0.5 <0.5 <0.5 <2.0[4] No FP,No S
<br /> 12/11/2001 41.80 -29.04 NE <50 <0.50 <0.50 <0.50 <0.50 <2.0[4] No FP,No S
<br /> 3/14/2002 38.70 -25.94 E-NE <50 <0.50 <0.50 <0.50 <0.50 <0.50[41 No FP,No S
<br /> 6/19/2002 41.57 -26.81 E-NE <50 <0.50 <0.50 <0.50 <0.50 <0.50[4] No FP,No S
<br /> 9/12/2002 48.74 -35.98 E-NE <50 <0.5 <0.5 <0.5 <0.5 <0.5 No FP,No S
<br /> 12/3/2002 45.05 -32.29 E-NE 81 <0.5 <0.5 <0.5 18 <0.5 No FP,No S
<br /> 3/11/2003 44.98 -32.22 NE <50 <0.5 <0.5 <0.5 <0.5 <0.5 No FP,No S
<br /> 6/9/2003 42.01 -29.25 E-NE <50 <0.5 <0.5 <0.5 <0.5 <0.5 No FP,No S
<br /> 9/17/2003 50.68 -37.92 NE <50 <0.5 <0.5 <0.5 <0.5 <0.5 No FP,No S
<br /> 12/11/2003 44.89 -32.13 NE-SW <50 <0.5 <0.5 <0.5 <0.5 <0.5 No FP,No S
<br /> KAW procesMJ5 BP ARC01021 MQuartertyA OTR 0312186 GWMR 4093 Page 4 of 8
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