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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 /> TQC 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) (pg/L) (pg/L) (pg/L) (pglL) (pg/L) (pg/L) (pg/L) (mg/L) Comments
<br /> MW-5 3/31/1999 P 9.37 24,71 -15.34 93.4 -- 8,42 <0.5 1 <0.5 6.835 95.7 - No FP,No S,No O,[60]
<br /> 6/28/1999 P 9.37 25.88 -16.51 175 - 22.4 <0.5 1.15 2.03 32.8 - No FP,No S,No O, [60]
<br /> 9/10/1999 P 9.37 27.87 -18.50 614 41.9 <0.5 10.9 29.3 93.6 -- No FP,No S,No O,[60]
<br /> 12/13/1999 P 9.37 26,92 -97.55 <50 -- <0.5 <0.5 <0.5 <0.5 7.52 - No FP,No S,No O,[60]
<br /> 3/28/2000 P 9.37 23.74 -14.37 <50 - <0.5 <0.5 <0.5 <0.5 <2.5 -- No FP,No S,No O, [60]
<br /> 6/26/2000 P 9.37 24.71 -15.34 106 -- 1.99 <0.5 <0.5 <0.542[2] -- No FP,No S,No O,[61]
<br /> 9/28/2000 P 9.37 27.24 -17.87 137 -- <0.5 <0.5 <0.5 <0.5 47.4 No FP,Na S,No O
<br /> 12/18/2000 P 9.37 25.87 -16.50 <50 - <0.5 <0.5 <0.5 <0.5 <2[2] - No FP,No S,No O
<br /> 3/14/2001 P 9.37 24.48 -15.11 <50 - <0.5 <0.5 <0.5 <0.5 <1,0 -- No FP,No S,Yes O
<br /> 6/19/2001 P 9.37 25.43 -16.06 <50 -- <0.5 <0.5 <0.5 <0.5 <2[2] - No FP,No S,Yes O
<br /> 9/11/2001 P 9.37 27.95 -18.58 <50 - <0.5 <0.5 <0.5 <0.5 <2[2] -- No FP,No S,Yes O
<br /> 12/13/2001 P 9.37 27.20 -17.83 <50 -- <0.50 <0.50 <0.50 <0.50 <0.50[2] -- No FP,No S,Yes O
<br /> 3/12/2002P 9.37 25.53 -16.16 <50 -- <0.50 <0.50 <0.50 <0.50 0.98[2] -- No FP,No S.Yes O
<br /> 6/17/2002 P 9.37 26.53 -17.16 <50 - <0.50 <0.50 <0.50 <0.50 <0.50[2) - No FP,No S,Yes O
<br /> 9/9/2002 P 9.37 29.38 -20.01 <50 -- <0.5 <0.5 <0.5 <0.5 <0.5 - No FP,No S,Yes O
<br /> 12/4/2002 P 9.37 29.14 -19.77 <50 - <0.5 0.62 <0.5 3.4 <0.5 - No FP,No S,Yes O
<br /> 03/03/2003 P 9.37 28.91 -19.54 <50 - <0.50 <0.50 <0.50 <0.50 <0.50[2] 1.99
<br /> 06/03/2003 P 9.37 28.67 -19.30 <50 -- <0.50 <0.50 <0.50 <0.50 <0.50[2] 5.48
<br /> 09/18/2003 P 9.37 32.08 -22.71 <50 - <0.50 <0.50 <0.50 <0.50 <0.50[2] 1.21
<br /> z- Z 12/08/2003 P 9.37- 31.93 -22,56 <50 - <0,50 <0.50 <0.50 <0.50 <0.50[2] -
<br /> 03/11/2004 P 9.37 29.17 -19.60 <50 <0.50 <0.50 <0.50 <0.50 <0.50 3.36
<br /> MW-6 2/15/1995 -- 8.95 40.02 -31.07 <50 - <0.5 <0.5 <0.5 <0.5 NA - No FP,No S,No O,[58]
<br /> D-(,O 5/12/1995 -- 8.95 38.26 -29.31 <50 -- <0.5 <0.5 <0.5 <0.5 NA - No FP,No S,No O, [58]
<br /> 8/29/1995 - 8.95 39.91 -30.9fi '<52 -- <0.5 <0.5 <0.5 <0.5 NA -- No FP,No S,No O,[59]
<br /> 12/4/1995 $.95 38.38 -29.43 `<70 -- <0.5 <0.5 <0.5 <0.5 NA - No FP,No S,No O, [58]
<br /> 2/2/1996 -- 8.95 36.38 -27,43 <50 -- <0.5 <0.5 <0.5 <0.5 NA - No FP, No S,No O
<br /> 5/10/1996 - 8.95 33.88 -24.93 <50 -- <0.5 <0.5 <0,5 <0.5 <3 -- No FP,No S,No O,[59]
<br /> 8/29/1996 -- 8.95 35.66 -26.71 <50 -- <0.5 <0.5 <0.5 <0.5 <3 No FP,No S,No O,[59]
<br /> 11/20/1996 -- 8.95 34.57 -25.62 <50 -- <0.5 <0.5 <0.5 <0.5 <3 -- No FP,No S,No O,[59]
<br /> 3/19/1997 -- 8.95 30.83 -21.88 <50 -- <0.5 <0.5 <0.5 <0.5 <3 - No FP,No S,No O,[57]
<br /> 5/27/1997 -- 8.95 31.16 -22.21 <50 - <0.5 <0.5 <0.5 <0.5 <3 No FP, No 5,No O
<br /> 8/12/1997 - 8.95 32.55 -23.60 <50 - <0.5 <0.5 10.5 <0.5 <5 -- No FP,No S,No O,[59]
<br /> 11/18/1997 -- $.95 32.19 -23.24 54 - 5.9 5.8 1.6 9.2 <5 - No FP,No S, Na O,[57]
<br /> Report Date:May 17, 2004 Page 6 of 14
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