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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 msl) (feet bgs) (feet msl) (dug/L) (pg/L) (ug/L) (!rg/L) (ug/L) (pg1L) (lrg/L) (mg/L) Comments
<br /> MW-4 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 /> 12118/2000 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 <1.0 - 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 /> T91 3/20 01 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 /> 03103!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 <0,56 <0.50[2] 3.43
<br /> 0 911 812 00 3 P 11.57 32.60 -21.03 <50 - <0.50 <0.50 <0.50 <0.50 <0.50[2] 1.41
<br /> 1210812003 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 3.01
<br /> iV1W-5 2/15/1995 -- 9.37 40.28 -30.91 6,700 -- 420 87 620 1,100 NA -- No FP,No S,No
<br /> a-�Z 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,Na O,(60]
<br /> 11/20/1996 - 9.37 34.83 -25.46 4,500 - 210 93 310 510 '<50 -- No FP,Na 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 /> 11/18/1997 9.37 32.49 -23.12 1,300 - 180 12 18 88 *<25 - No FP,No S,Yes O,[61]
<br /> 2/16/1998 - 9.37 29.14 -19.77 630 -- 110 <2.5 22 8.3 44 - No FP,No S,Yes O,
<br /> [61.5]
<br /> 6/23/1998 P 9.37 26.61 -17.24 702 -- 50.4 7.91 33.3 36.6 47.3 -- No FP,No S,No O,[60]
<br /> 9/29/1998 P 9.37 28.39 -19.02 1,790 - 242 <5 121 135 145 No FP,No S,No O,[60]
<br /> 12/30/1998 P 9.37 26.22 -16.85 275 - 19 <0.5 6.05 0.629 38.2
<br /> I
<br /> Report Date:May 17,2004 Page 5 of 14
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