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<br /> 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 msl) (feet bgs) (feet msl) (pg/L) (4VIL) (pg1L) MIL) (pg/L) (Erg/L) (Ng1L) (mg/L) Comments
<br /> MW-4 9/10/1999 P 11.57 29.54 -17.97 <50 -- <0.5 <0.5 <0.5 <0.5 <5 - No FP,No S,No O, [62]
<br /> 12/13/1999 P 11.57 28.80 -17.23 <50 - <0.5 <0.5 <0.5 <0.5 <2.5 - No FP,No S,No O, [62]
<br /> 3/28/2000 P 11.57 25.71 -14.14 <50 -- <0.5 <0.5 <0.5 <0.5 <2.5 - No FP,No S,No O,[62]
<br /> 6/26/2000 P 11.57 26.53 -14.96 <50 - <0,5 <0.5 <0.5 <0.5 <2.0[2] -- No FP,No S,No O,[63]
<br /> 9/28/2000 P 11.57 28.94 -17.37 <50 - <0.5 <0.5 <0.5 <0.5 <2.5 - No FP,No S,No O
<br /> 12/18/2000 P 11.57 27.75 -16.18 <50 -- <0.5 <0.5 <0.5 <0.5 <2[2] - No FP,No S,No O
<br /> 3/14/2001 P 11.57 26.42 -14.85 <50 - <0.5 <0.5 <0.5 <0.5 0.0 -- No FP,No S,No O
<br /> 6/19/2001 P 11.57 27.26 -15.69 <50 - <0.5 <0.5 <0.5 <0.5 <2[2] -- No FP,No S,No O
<br /> 9/11/2001 P 11.57 29.65 -18.08 <50 - <0.5 <0.5 <0.5 <0.5 <2[2] -- No FP,No S,No O
<br /> 1 211 312 00 1 P 11.57 29.10 -17,53 <50 - <0.50 <0.50 <0.50 <0.50 <0.50[2] -- No FP,No S,No O
<br /> 3/12/2002 P 11.57 27.40 -15.83 <50 - <0.50 <0.50 <0.50 <0.50 <0.50[2] - No FP,No S,No O
<br /> 6/17/2002 P 11.57 28.26 -16.69 <50 -- <0.50 <0.50 <0.50 <0.50 <0.50[2] -- No FP,No S,No O
<br /> 9/9/2002 P 11.57 31.03 -19.46 <50 - <0.5 <0.5 <0.5 <0.5 <0.5 - No FP,No S,No O
<br /> 12/4/2002 P 11.57 31.00 -19.43 <50 <0.5 <0.5 <0.5 <0.5 <0.5 -- No FP,No S,No O
<br /> 03/03/2003 P 11.57 29.34 -17.77 <50 - <0,50 <0.50 <0.50 <0.50 <0.50[2] 1.71
<br /> 06/03/2003 P 11.57 29.04 -17.47 <50 -- <0.50 <0.50 <0.50 <0.50 <0.50[2] 3.43
<br /> 09/18/2003 P 11.57 32.60 -21.03 <50 -- <0.50 <0.50 <0.50 <0.50 <0.50[2] 1.41
<br /> 12/08/2003 P 11.57 32.46 -20.89 <50 -- <0.50 <0.50 <0.50 <0.50 <0.50[2] -
<br /> 03/11/2004 P 11.57 30.66 -19.09 <50 -- <0.50 <0.50 <0.50 <0.50 <0.50[2] 3.01
<br /> 06/1112004 P 11.57 31.60 -20.03 <50 -- <0.50 <0.50 <0.50 <0.50 <0.50[2] 3.1
<br /> MW-5 2/15/1995 - 9.37 40.28 -30.91 6,700 - 420 87 620 1,100 NA - No FP,No S,No O, [601
<br /> 5/12/1995 -- 9.37 38.95 -29.58 5,000 -- 560 110 400 600 NA - No FP,No S,Yes O,[61]
<br /> 8/29/1995 9.37 40.07 -30.70 5,700 - 410 150 310 590 NA -- No FP,No S,No O,[60]
<br /> 12/4/1995 - 9.37 38,63 -29.26 1,200 55 11 83 92 NA - No FP,No S,Yes O,[61]
<br /> 2/2/1996 - 9.37 36.66 -27.29 270 -- 7.6 1.5 11 9.8 NA -- No FP,No S,Yes O
<br /> 5/10/1996 -- 9.37 34.15 -24.78 5,700 - 420 180 380 610 34 -- No FP,No S.No O, [60]
<br /> 8/29/1996 -- 9.37 35.99 -26.62 9,600 - 510 90 710 970 39 -- No FP,No S,No O, [60]
<br /> 11/20/1996 - 9.37 34.83 -25.46 4,500 -- 210 93 310 510 '<50 -- No FP,No S,No O, [60]
<br /> 3/19/1997 -- 9.37 31.12 -21.75 6,200 - 420 68 360 590 -'60 -- No FP,No S,No O, [60]
<br /> 5/27/1997 - 9.37 31.19 -21.82 4,500 -- 490 59 230 350 97 No FP,No S,Yes O
<br /> 8/12/1997 -- 9.37 32.76 -23.39 3,600 -- 260 12 260 350 110 - No FP,No S,No O,(60]
<br /> 11/18/11997 - 9.37 32.49 -23.12 1,300 - 180 12 18 88 `<25 - No FP,No S,Yes O, [61]
<br /> Report Date:July 26, 2004 Page 5 of 15
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