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<br /> Table 4
<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 ME DO
<br /> Number Sampled NP (feet msl) (feet bgs) (feet msl) (pg/L) (pgll-) Wfl-) (pg1L) (pgll-) (pg1L) (pglL) (mg1L) Comments
<br /> VW-3 9/9/2002 NP - 29.45 - <50 -- 5.5 <0.5 <0.5 1.4 1.6 - No FP, No S,No O
<br /> 12/412002 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 <5.0121 -
<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 /> 06/11/2004 NP - 30.92 - 240 -- 3.6 <0.50 <0.50 0.77 1.5[2] 1.6
<br /> 08/03/2004 P -- 32.31 -- 7,000 -- 160 <5.0 510 1,100 6.5[2] 1.4
<br /> VW-4 9/29/1998 NP - 29.35 - 328 -- 1.71 <0.5 1.1 6.12 2,560 - jNo FP, No S,Yes O,[42]
<br /> 12130/1998 NP - 27.20 - 97.2 - <0.5 0.562 <0.5 0.746 2,240 - No FP,No S,Yes O,142]
<br /> 3/31/1999 - - 25.81 - - -- -- - -- - - - No FP,No S,No O Not
<br /> scheduled for sampling
<br /> 6/28/1999 - - 26.94 _ -- _ _ _ _ _ - -- No FP, No S,No O Not
<br /> scheduled for sampling
<br /> 9/10/1999 - - 29.00 - - - - - - -- - -- No FP,No S,No O Not
<br /> scheduled for sampling
<br /> 12/13/1999 - - 28.12 - - _ _ _ _ _ - - No FP, No S, No O Not
<br /> scheduled for sampling
<br /> 3/28/2000 - - 24.89 - -- - - - - -- - No FP,No S,No O Not
<br /> scheduled for sampling
<br /> 6/26/2000 - - 29.88 - - - - - - - - -- No FP, No S, No O Not
<br /> scheduled for sampling
<br /> 9/28/2000 -- - 28.39 - - - - -- - -- - - No FP,No S,No O Not
<br /> scheduled for sampling
<br /> 12/18/2000 - -- 26.19 - -- - - - - - - -- No FP, No S, No O Not
<br /> scheduled for sampling
<br /> 3/14/2001 - - 24.87 - - - -- - -- - - -- No FP,No S,No O Not
<br /> scheduled for sampling
<br /> 6/19/2001 - - 26.28 -- - - - - -- - - No FP, No S, No O Not
<br /> scheduled for sampling
<br /> 9/11/2001 - - 29.13 - -- - - _ - - -- - No FP,No S,No O Not
<br /> scheduled for sampling
<br /> 1 211 31200 1 NP -- 28.50 - <50 -- <0.50 <0.50 <0.50 <0.50 100[2] - No FP,No S, No O
<br /> 3/12/2002 NP - 26.10 - <50 - <0.50 <0.50 <0.50 <0.50 32[2] - No FP,No S,No O
<br /> )61-17/2002 NP - 27.74 - 59[3] -
<br /> <0.50 <0.50 <0.50 1 <0.50 98[2] - No FP, No S, No O
<br /> Reporf Date:August 25, 2004 Page 11 of 15
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