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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 I 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) "IL) (pg1L) (pg/L) (pg/L) (pg/L) (pg1L) (mg1L) Comments
<br /> MW-6 2/16/1998 - 8.95 28.83 -19.88 <50 - <0.5 <0.5 <0.5 <0.5 <5 -- No FP,No S. No 0, [57]
<br /> 6/23/1998 P 8.95 26.36 -17.41 <50 -- <0.5 <0.5 <0.5 <0.5 <5 - No FP,No S,No O,(57]
<br /> 9/29/1998 P 8.95 28.19 -19.24 <50 -- <0.5 <0.5 <0.5 <0.5 <5 -- No FP,No S,No 0,[57]
<br /> 12/30/1998 P 1 8.95 25.91 -16.96 <50 - <0.5 <0.5 <0.5 <0.5 <5 - No FP,No S,No 0, [59]
<br /> 3/31/1999 P 8.95 24.37 -15.42 <50 -- 0.623 <0.5 <0.5 <0.5 12.2 - No FP,No S,No 0,[59]
<br /> 6/28/1999 P 8.95 25.59 -16,64 <50 - <0.5 <0.5 <0.5 <0.5 18.1 - No FP,No S,No O,[59]
<br /> 9/10/1999 P 8.95 27.62 -18.67 <50 -- <0.5 <0.5 <0.5 <0.5 17.8 -- No FP,No S, No O,[59]
<br /> 12/13/1999 P 8.95 26.62 -17.67 <50 -- <0.5 <0.5 <0.5 <0.5 9.35 - No FP,No S,No O,(59]
<br /> 3/28/2000 P 8.95 23.39 -14.44 <50 -- <0.5 <0.5 <0.5 <0.5 9.01 -- No FP,No S,No O,[59]
<br /> 6/26/2000 P 8.95 24,41 -15.46 <50 - <0.5 <0.5 <0.5 <0.5 14[2] -- No FP,No S,No O,[57]
<br /> 9/28/2000 P 8.95 27.00 -18.05 <50 -- <0.5 <0.5 <0.5 <0.5 5.31 - No FP,No S,No O
<br /> 12/18/2000 P 8.95 25.66 -16.71 <50 -- <0.5 <0.5 <0.5 <0.5 <2[2] -- No FP,No S,No O
<br /> 3/14/2001 P 8.95 24.17 -15.22 <50 - <0.5 <0.5 <0.5 <0.5 2.12 -- No FP,No S,No O
<br /> 6/19/2001 P 8.95 25.16 -16.21 <50 -- <0,5 <0.5 <0.5 <0.5 7.2[2] - No FP,No S, No O
<br /> 9/11/2001 P 8.95 27.69 -18.74 <50 -- <0.5 <0.5 <0.5 <0,5 6.8[2] -- No FP,No S,No O
<br /> 12113/2001 P 8.95 26.95 -18.00 <50 - <0.50 <0.50 <0.50 0.73 21[2] -- No FP,No S,No O
<br /> 3/12/2002 P 8.95 25.13 -16.18 <50 - <0.50 <0.50 <0.50 <0.50 0.53[2] - No FP,No S, No O
<br /> 6/17/2002 P 8.95 26.22 -17.27 <50 -- <0.50 <0.50 <0.50 <0.50 7.7[2] - No FP,No S, No O
<br /> 9/9/2002 P 8.95 29.11 -20.16 <50 -- <0.5 <0.5 <0.5 <0.5 1 -- No FP,No S,No O
<br /> 12/4/2002 P 8.95 28.86 -19.91 <50 - <0.5 <0.5 <0.5 <0.5 <0.5 -- No FP,No S.No O
<br /> 03/03/2003 P 8.95 29.04 -20.09 <50 -- <0.50 <0.50 <0.50 <0.50 <0.50[2] 3.86
<br /> 06/03/2003 P 8.95 29.00 -20.05 <50 -- <0.50 <0.50 <0.50 <0.50 <0.50[2] 5.1
<br /> 09/18/2003 - 8.95 -- -- - -- - -- -- - -- Not Sampled
<br /> 4p 12/08/2003 P 8.95 30.52 -21.57 <50 - <0.50 <0.50 <0.50 <0.50 <0.50[2]
<br /> 03111/2004 P 8.95 30.43 -21.48 <50 -- <0.50 <0.50 <0.50 <0.50 <0.50 1.11
<br /> VW-1 9/29/1998 NP - 28.73 - 18,800 -- 573 59 873 4,120 2,300 - No FP,No S,Yes 0, [43]
<br /> 12/30/1998 NP -- 26.50 - 19,200 -- 2,150 <50 691 3,310 785 -- No FP,No S,Yes O,[43]
<br /> 3/31/1999 -- - 24.97 - -- -- - -- - -- -- -- No FP,No S, No O Not
<br /> scheduled for sampling
<br /> 6/28/1999 - - 25.99 -- - - - - - -- - -- No FP,No S,No 0 Not
<br /> scheduled for sampling
<br /> 9/10/1999 - - 28.33 - - - -- - F - -- - -- No FP,No S, No O Not
<br /> scheduled for sampling
<br /> Report Date:May 17,2004 Page 7 of 14
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