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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 /> Well Date PI Elevation Water Elevation TPHg TPHd Benzene Toluene benzene Xylenes MtBE DO
<br /> Number Sampled NP (feet msl) (feet bgs) (feet msl) (Erg/L) {E+9/L) {Erg/L) (Erg/L) (pglL) (lig/L) (pg/L) (mg/L) Comments
<br /> VW-2 3/28/2000 - - 25.24 -- - -- -- -- -- - - - No FP,No S, No O Not
<br /> scheduled for sampling
<br /> 6/26/2000 -- - 26.10 -- -- - - -- - - -- No FP,No S, No O Not
<br /> scheduled for sampling
<br /> 9/28/2000 - - 28.69 - - - - - - -- _ No FP,No S,No 0 Not
<br /> scheduled for sampling
<br /> 12/18/2000 - - 26.51 -- -- -- -- - -- - - - No FP,No S,No O Not
<br /> scheduled for sampling
<br /> 3/14/2001 - - 24.40 - -- -- - -- -- - - - No FP,No S, No 0 Not
<br /> scheduled for sampling
<br /> 6/19/2001 -- -- 25.15 -- - -- -- _ _. -- No FP,No S,No O Not
<br /> scheduled for sampling
<br /> 9/11/2001 -- -- 29.40 - - - - - - -- -- -- No FP,No S,No O Not
<br /> scheduled for sampling
<br /> 12/13/2001 NP - 28.75 - 180[3] - 2.6 <0.50 <0.50 <0.50 1.5[2] - No FP,No S,No O
<br /> 3/12/2002 NP - 26.48 - <50 -- <0.50 <0.50 <0.50 <0.50 <0.50[2] - No FP,No S,No O
<br /> 6/17/2002 NP -- 28.03 - <50 - <0.50 <0.50 <0.50 <0.50 <0.50[2] - No FP,No S, No 0
<br /> 9/9/2002 NP - 30.75 - 200 - 2.3 0.77 <0.5 <0.5 4.4 - No FP,No S, No 0
<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 /> L2_K L 12/08/2003 NP - 32.01 - 490 - <5.0 <5.0 <5.0 <5.0 5.0[2] -
<br /> 03/1112004 NP - 28.61 290 _ <5.0 <5.0 <5.0 <5.0 <5.0 --
<br /> VW-3 9/29/1998 NP -- 29.45 -- 39,300 -- 2.360 391 1,540 9,790 <500 - No FP,No S,Yes O,[40]
<br /> 12/30/1998 NP - 27.28 - 40,500 - 3,450 287 2.370 11,700 <500 - No FP,No S,Yes O,[40]
<br /> 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 /> FNo
<br /> eduled for sampling
<br /> 12/13/1999 -- - 28.06 -- - - - - -- -- -- -- FP,No S,NoO Not
<br /> eduled for sampling
<br /> r- 3/28/2000 -- -- 24.88 -- -- - - -- - - -- -- FP,No S,No O Not
<br /> , eduled for sampling
<br /> Report Date:May 17, 2004 Page 9 of 14
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