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<br /> TABLE 1
<br /> GROUNDWATER ELEVATION AND ANALYTICAL DATA
<br /> ARCO Service Station No.548
<br /> 1612 Hammer Lane,Stockton,California
<br /> Well Elevation Static Top Elevation Groundwater
<br /> Sample of Top Water of of Flow Ethyl- Total
<br /> Number Date of Casing Level Screen Groundwater Direction TPHg Benzene Toluene benzene X lens MtBE[1] Observations
<br /> VW-2 (41) 9/29/1998 [NP] NM 29.01 25.00 E 13,200 822 <12.5 1,370 754 <125 No FP,No S,Yes O
<br /> (41) 12/30/1998 [NP] NM 27.47 SE 8,950 778 <20 1,180 339 <200 No PP,No S,Yes O
<br /> 3/31/1999 NM 25.21 -- E-SE Not scheduled for sampling No FP,No S,No O
<br /> 6/28/1999 NM 26.35 -- SE Not scheduled for sampling No FP,No S,No O
<br /> 9/10/1999 NM 29.29 -- E Not scheduled for sampling No FP,No S,No O
<br /> 12/13/1999 NM 28.43 E Not scheduled for sampling No FP,No S,No O
<br /> 3/28/2000 NM 25.24 -- SE Not scheduled for sampling No PP,No S,No O
<br /> 6/26/2000 NM 26,10 -- E Not scheduled for sampling No PP,No S,No O
<br /> 9/28/2000 NM 28.69 - E-NE Not scheduled for sampling No FP,No S,No O
<br /> 12/18/2000 NM 26.51 E Not scheduled for sampling No FP,No S,No O
<br /> 3/14/2001 NM 24.40 -- E Not scheduled for sampling No FP,No S,No O
<br /> 6/19/2001 NM 25.15 -- E Not scheduled for sampling No FP,No S,No O
<br /> 9/11/2001 NM 29.40 -- E Not scheduled for sampling No FP,No S,No O
<br /> 12/13/2001 [NP] NM 28.75 -- ENE 180[3] 2.6 <0.50 <0.50 <0.50 1.5[2] No FP,No S,No O
<br /> 3/12/2002 [NP] NM 26.48 - E <50 <0.50 <0.50 <0,50 <0.50 <0.50[2] No FP,No S,No O
<br /> 6/17/2002 [NP] NM 28.03 -- E <50 <0.50 <0.50 <0.50 <0.50 <0.50[2] No FP,No S,No O
<br /> 9/9/2002 NP NM 30.75 -- NE 200 2.3 0.77 <0.5 <0.5 4.4 No FP,No S,No O
<br /> VW-3 (40) 9/29/1998 [NP] NM 29.45 22.00 - E 39,300 2,360 391 1,540 9,790 <500 No FP,No S, Yes O
<br /> (40) 12/30/1998 [NP] NM 27.28 -- SE 40,500 3,450 287 2,370 11,700 <500 No FP,No S, Yes O
<br /> 3/31/1999 NM 25.87 -- E-SE Not scheduled for sampling No FP,No S,No O
<br /> 6/28/1999 NM 26.88 -- SE Not scheduled for sampling No FP,No S,No O
<br /> 9/10/1999 NM 28.89 -- E Not scheduled for sampling No FP,No S,No O
<br /> 12/13/1999 NM 28.06 - E Not scheduled for sampling No FP,No S,No O
<br /> 3/28/2000 NM 24.88 - SE Not scheduled for sampling No FP,No S,No O
<br /> 6/26/2000 NM 29.78 -- E Not scheduled for sanTling No FP,No S,No O
<br /> 9/28/2000 NM 28.30 -- ENE Not scheduled for sampling No FP,No S,No O
<br /> 12/18/2000 NM 26.08 E Not scheduled for sampling No FP,No S,No O
<br /> 3/14/2001 NM 24.20 - E Not scheduled for sampling No FP,No S,No O
<br /> 6/19/2001 NM 26.50 - E Not scheduled for sampling No FP,No S,No O
<br /> 9/11/2001 NM 29.02 - E Not scheduled for sampling No FP,No S,No O
<br /> 12/13/2001 [NP] NM 28.35 -- E-NE 1,100 150 <5.0 7.6 16 16121 No FP,No S,No O
<br /> 3/12/2002 [NP] NM 24.80 -- E <50 <0.50 <0.50 <0,50 <0.50 0.72(2] No FP,No S,No O
<br /> 6/17/2002 [NP] NM 27.60 E <50 <0.50 <0.50 <0.50 <0.50 <0.50[2] No FP,No S,No O
<br /> 0548 QMR3QO2
<br /> 7 of 10
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