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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 /> Wall Date Pl Elevation Water Elevation TPHg TPHd Benzene Toluene benzene Xylenes MtBE DO
<br /> Number Sampled NP (feet msl) (feet bgs) (feet msl) (pg1L) (pg1L) (pg1L} (1►g1L) (/ig1L} (lrg1L) (pg1L} (mg1L} Comments
<br /> VW-2 9/9/2002 NP - 30.75 -- 200 -- 2.3 0.77 <0.5 <0.5 4.4 -- No FP,No 5,No O
<br /> 12!4!2002 NP -- 30.25 - 770 18 <0.5 <0.5 <0.5 5.4 - No FP,No S,No O
<br /> 03/03/2003 NP -- 28.88 - <100 - <1.0 <1.0 <1.0 <1.0 <1.0[2]
<br /> 06/03/2003 NP 28.64 -- <50 - <0.50 <0.50 <0.50 <0.50 <0.50[2]
<br /> 09/18/2003 NP - 32.20 - 380 -- <5.0 <5.0 <5.0 <5.0 <5.0[2] -
<br /> 12/08/2003 NP -- 32.01 -- 490 - <5.D <5.0 <5.0 <5.0 5.0[2] -
<br /> 03111/2004 NP - 28.61 -- 290 - <5.0 <5.0 <5.0 <5.0 <5.0[2]
<br /> 06/11/2004 NP 31.30 - <50 -- <0.50 <0.50 <0.50 <0.50 <0.50[2] 2.0
<br /> 108103120041 P -- 32.71 - 600 - 3.9 <0.50 12 1.1 2.4[2] 1.9
<br /> VW-3 9/29/1998 NP - 29.45 - 39,340 - 2,360 391 1,540 9,790 <500 -- No FP,No S,Yes O, [40]
<br /> T2130/1998 NP -- 27.28 - 40,500 - 3,450 287 2,370 11,7Q0 <500 -- No FP,No S,Yes 0, [40]
<br /> 3!31!1999 -- - 25.87 -- -- - - - -- -- - - No FP,No S, No 0 Not
<br /> scheduled for sampling
<br /> 6/28/1999 - 26.88 - -- - - -- - -- -- No FP,No S,No 0 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 0 Not
<br /> scheduled for sampling
<br /> 3/28/2000 - -- 24.88 -- - - - -- -- -- - No FP,No S,No 0 Not
<br /> scheduled for sampling
<br /> 6/26/2000 -- -- 29.78 - - -- - - - -- -- -- No FP,No S,No 0 Not
<br /> scheduled for sampling
<br /> 9/28/2000 -- -- 28.30 -- - _ - -- - -- No FP, No S,No O Not
<br /> scheduled for sampling
<br /> 92!1812000 -- 26.08 - - - -- - -- -- -- -- No FP, No S,No 0 Not
<br /> scheduled for sampling
<br /> 3/14/2001 - 24.20 -- -- - - - - -- - No FP, No S,No 0 Not
<br /> scheduled for sampling
<br /> 6l19/2Q01 -- -- 26.50 - - - -- - - - - No FP, No S,No 0 Not
<br /> scheduled for sampling
<br /> 9Ii 112001 - -- 29.02 - - - -- -- -- -- -- No FP, No S,No 0 Not
<br /> scheduled for sampling
<br /> 12/13/2001 NP - 28.35 - 1,140 - 150 <5.0 7.6 16 16[2] - No FP, No S,No 0
<br /> 3/12/2002 NP - 24.80 -- <50 - <0.50 <0.50 <0.50 <0.50 0.72[2] -- No FP,No S,No 0
<br /> 6/1712002 NP -- 27.60 - <50 -- <0.50 <0.50 <0.50 <0.50 <0.50f2l No FP,No S.No 0
<br /> Page 10 of 15
<br /> Report Date:August 13,2004
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