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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 /> TOCDepth 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) (pg/L) (pg/L) (pglL) (pg/L) (erg/L) (pg/L) (pg/L) (mg/L) Comments
<br /> VW-3 3/31/1999 -- - 25.87 -- - - -- -- - - - No FP,No S,No O Not
<br /> scheduled for sampling
<br /> 6/28/1999 -- -- 26.88 - - - -- -- - - - No FP,No S,No O Not
<br /> scheduled for sampling
<br /> 9/10/1999 -- -- 28.89 - - -- -- - - -- - No FP,No S, No O Not
<br /> scheduled for sampling
<br /> 12/13/1999 -- -- 28.06 -- -- -- - - -- - - -- No FP,No S,No O Not
<br /> scheduled for sampling
<br /> 3/28/2000 -- - 24.88 -- -- - -- - - -- No FP,No S,No O Not
<br /> scheduled for sampling
<br /> 6/26/2000 -- - 29.78 - - -- -- - -- -- - No FP,No S,No O Not
<br /> scheduled for sampling
<br /> 9/28/2000 -- -- 28.30 - -- -- - - -- - - -- No FP,No S,No O Not
<br /> scheduled for sampling
<br /> 12/18/2000 - - 26.08 -- - - -- -- - - -- - No FP,No S,No O Not
<br /> scheduled for sampling
<br /> 3/14/2001 -- - 24.20 - - - - - -- -- - No FP,No S,No O Not
<br /> scheduled for sampling
<br /> 6/19/2001 - - 26.50 - -- - - -- - - -- No FP,No S,No O Not
<br /> scheduled for sampling
<br /> 9/11/2001 - -- 29.02 - - - -- -- - - -- - No FP,No S,No O Not
<br /> scheduled for sampling
<br /> 12/13/2001 NP - 28.35 - 1,100 -- 150 <5.0 7.6 16 16[2] -- No FP,No S,No O
<br /> 3/12/2002 NP -- 24.80 - <50 -- <0.50 <0.50 <0.50 <0.50 0.72[2] - No FP,No S,No O
<br /> 6/17/2002 NP - 27.60 - <50 - <0.50 <0.50 <0.50 <0.50 <0.50[2] -- No FP,No S,No O
<br /> 9/9/2002 NP - 29.45 - <50 -- 5.5 <0.5 <0.5 1.4 1.6 - No FP, No S,No O
<br /> 12/4/2002 NP -- 30.69 - 610 - 19 1.9 <0.5 7.9 4.6 - No FP,No S,No O
<br /> 03/03/2003 NP 28.51 -- 1,300 - 20 1.8 2.3 11 3.6[2] --
<br /> 06/03/2003 NP - 28.55 - 83 -- 4.3 <0.50 <0.50 <0.50 2.7[2] -
<br /> 09/18/2003 NP -- 32.07 - 630 -- 32 <5.0 7.7 <5.0 <5.0[2] -
<br /> 12/08/2003 NP - 31.92 - 1,400 - 48 <10 24 <10 <10[2] -
<br /> 03/11/2004 NP - 28.31 1,000 -- 68 <10 50 <10 <10[2] -
<br /> 06111/20041 NP 1 30.92 -- 240 -- 3.6 <0.50 <0.50 0.77 1.5[2] 1.6
<br /> VW-4 1 9/29/1998 INP 1 29.35 - 328 1 1.71 1 <0.5 1 1.1 6.12 2,560 1 - INo FP,No S,Yes O,[42]
<br /> 12/30/1998 j NP 1 27.20 -- 97.2 <0.5 1 0.562 <0.5 0.746 2,240 - jNo FP,No S,Yes O,[42]
<br /> Report Date:July 26,2004
<br /> Page 10 of 15
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