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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 P/ Elevation Water Elevation TPHg TPHd Benzene Toluene benzene Xylenes MtBE DO
<br /> Number Sampled NP (feet msI) (feet bgs) (feet msl) (ugIL) (pglL) (Erg1L) Wg/L) (pg/L) (pg/L) W/L) (mg1L) Comments
<br /> MW-1 06/03/2003 P 10.36 28.11 -17.75 <50 - 0.94 <0.50 <0.50 <0.50 320[2] 3.97
<br /> -6-�3 09/18/2003 P 10.36 31.63 -21.27 130 R - <25 <25 <25 <25 320[2] 1.61
<br /> 12/08/2003 P 10.36 31.56 -21.20 80 R <5.0 <5.0 <5.0 <5.0 250[2] --
<br /> 03/11/2004 P 10.36 29.96 -19.60 60 -- <5.0 <5.0 <5.0 <5.Q 200 1.49
<br /> MW-2 2/15/1995 - 9.82 40.67 -30.85 <50 - <0.5 <0.5 0.5 <0.5 NA - No FP,NO S,No 0,[61]
<br /> LI.1-,6-L 5/12/1995 - 9.82 38.85 -29.03 <50 - <0.5 <0.5 <0.5 <0.5 NA - No FP,No S,No 0,[61]
<br /> 8/29/1995 - 9.82 40.44 -30.62 '<52 - <0.5 <0.5 1 <0.5 NA -- No FP,No S,No O,[61]
<br /> 12/4/1995 - 9.82 39.08 -29.26 '<60 - <0.5 <0.5 <0.5 <0.5 NA - No FP,No S,No 0,[61]
<br /> 2/2/1996 - 9.82 37.09 -27.27 <50 - <0.5 <0.5 <0.5 <0.5 NA - No FP,No S,No 0
<br /> 5/10/1996 - 9.82 34.55 -24.73 <50 -- <0.5 <0.5 <0.5 <0.5 <3 - No FP,No 5,No 0, [61]
<br /> 8/29/1996 - 9.82 36.29 -26.47 '"<60 - <0.5 <0.5 <0.5 <0.5 <3 No FP,No S,No O, [61]
<br /> 11/20/1996 -- 9.82 35.25 -25.43 <50 - 0.5 <0.5 <0.5 <0.5 <3 - No FP,No S,No 0,[61)
<br /> 3/19/1997 - 9.82 31.52 -21.70 <50 - 0.6 <0.5 <0.5 <0.5 <3 - No FP,No S.No O,[61]
<br /> 5/27/1997 - 9.82 31.79 -21.97 <50 - 1.2 <0.5 <0.5 <0.5 <3 - No FP,No S,No 0
<br /> 8/12/1997 -- 9.82 33.18 -23.36 52 - <0.5 <0.5 <0.5 <0.5 <5 -- No FP,No S,No 0,[60]
<br /> 11/18/1997 -- 9.82 32.88 -23.06 <50 - 2.6 1.4 0.65 1.5 <5 -- No FP,No S,No 0,[61]
<br /> 2/16/1998 - 9.82 29.48 -19.66 <50 - <0.5 <0.5 <0.5 <0.5 <5 -- INo FP,No S,No O,[60]
<br /> 6/23/1998 P 9.82 26.98 -17.16 <50 - <0.5 <0.5 <0.5 <0.5 <5 - No FP,No S,No 0, [60]
<br /> 9/29/1998 P 9.82 28.78 -18.96 <50 - <0.5 <0.5 <0.5 <0.5 <5 -- No FP,No S,No 0, [60]
<br /> 12/30/1998 P 9.82 26.53 -16.71 <50 - <0.5 <0.5 <0.5 <0.5 <5 -- No FP,No S,No O, [60]
<br /> 3/31/1999 P 9.82 25.11 -15.29 <50 - <0.5 <0.5 <0.5 <0.5 <5 - No FP,No S,No 0,[60]
<br /> 6/28/1999 P 9.82 26.25 -16.43 <50 - <0.5 <0.5 <0.5 <0.5 <5 - No FP,No S,No 0,[60]
<br /> 9/10/1999 P 9.82 28.28 -18.46 <50 - <0,5 <0,5 <0.5 <0.5 <5 -- No FP,No S,No O,[60]
<br /> 12/13/1999 P 9.82 27.35 -17.53 <50 - <0.5 <0.5 <0.5 <0.5 3.48 - NoFP,No S,No 0,[60]
<br /> 3/28/2000 P 9.82 24.07 -14.25 <50 -- <0.5 <0.5 <0.5 <0.5 <2.5 - No FP,No S,No O,[60]
<br /> 6/26/2000 P 9.82 25.12 -15.30 <50 - <0.5 <0.5 <0.5 <0.5 <2.0[2] - No FP,No S,No 0,[61]
<br /> 9/28/2000 P 9.82 27.68 -17.86 <50 - <0.5 <0.5 <0.5 <0.5 <2.5 - No FP,No S,No O
<br /> 12118/2000 P 9.82 26.29 -16.47 <50 - <0.5 <0.5 <0.5 <0.5 <2[2] - No FP,No S,No 0
<br /> 3/14/2001 P 9.82 25.00 -15.18 <50 - <0.5 <0.5 <0.5 <0.5 <5.0 - No FP,No S,No 0
<br /> 6/19/2001 P 9.82 25.88 -16.06 <50 - <0.5 <0.5 <0,5 <0.5 <2[2] - No FP,No S,No 0
<br /> 9/11/2001 P 9.62 28.41 -18.59 <50 -- <0.5 <0.5 <0.5 <0.5 <2[2] - No FP,No S,Yes O
<br /> 12/13/2001 P 9.82 27.70 -17.88 <50 - <0.50 <0.50 <0.50 <0.50 1.3[2] - No FP,No S,Yes 0
<br /> 3/12/2002 P 9.82 26.01 -16.19 <50 - <0.50 <0.50 <0.50 <0.50 1.6[2] - No FP,No S,Yes O
<br /> Report Date:May 17,2004 Page 2 of 14
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