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<br /> TABLE 1
<br /> Groundwater Elevation and Analytical Data
<br /> ARCO Service Station No.548
<br /> 1612 Hammer Lane,Stockton,California
<br /> Well Top of Static Top Groundwater Ethyl- Total
<br /> Sample Sample Casing Water of Groundwater Flow TPI-Ig Benzene Toluene benzene Xylenes MtBE[1]
<br /> Number Date Elevation Level Screen Elevation _ Direction p91L P9IL PV1L pg/L pg/L pg/L Observations
<br /> MW-4 (63) 2115/1995 11.57 42.12 44.00 -30.55 E <50 <0.50 <0.50 <0.50 <0.50 NA No FP,No S,No O
<br /> (63) 5/12/1995 11.57 40.28 -26.71 E <50 <0.50 <0.50 <0.50 <0.50 NA No FP,No S,No O
<br /> (63) 8/29/1995 11.57 41.72 -30.15 E <50 <0.50 <0.50 <0,50 <0,50 NA No FP,No S,No O
<br /> (63) 12/4/1995 11.57 40.44 -28.87 E <50 <0.50 <0.50 <0.50 <0.50 NA No FP,No S,No O
<br /> 2/2/1996 11.57 38.54 -26.97 E <50 <0,50 <0.50 <0.50 <0.50 NA No FP,No S,No 0
<br /> (63) 5/10/1996 11.57 36.02 -24.45 E <50 <0.50 <0.50 <0.50 <0.50 <3 No FP,No S,No O
<br /> (63) 8/29/1996 11.57 37.60 -26.03 E <50 <0.50 <0.50 <0.50 <0.50 <3 No FP,No S,No O
<br /> (63) 11/20/1996 11,57 36.71 -25.14 E <50 <0.50 <0.50 <0.50 <0.50 <3 No FP,No S,No O
<br /> (63) 3/19/1997 11.57 33.08 -21.51 E-SE <50 <0.50 <0.50 <0.50 <0.50 <3 No FP,No S,No O
<br /> 5/27/1997 11.57 33.21 -21.64 E-SE <50 <0.50 <0.50 <0.50 <0.50 <3 No FP,No S,No O
<br /> (62) 8/12/1997 11.57 34.45 -22.88 E <50 <0.50 <0,50 <0.50 <0.50 <5 No FP,No S,No O
<br /> (64) 11/18/1997 11.57 34.31 -22.74 E <50 4.5 2.5 0.91 2.1 <5 No FP,No S,No O
<br /> (63.8) 2/16/1998 11.57 31.17 -19.60 SE <50 <0.50 <0,50 <0.50 <0.50 <5 No FP,No S,No O
<br /> (62) 612311 998 [P] 11.57 28.52 -16.95 SE <50 <0.50 <0.50 <0.50 <0.50 <5 No FP,No S,No O
<br /> (62) 9/29/1998 [P] 11,57 30,13 -18.56 E <50 <0.50 <0.50 <0.50 <0.50 <5 No FP,No S,No O
<br /> 12/30/1998 11.57 NM - SE -----------------------Well inaccessible--------------------------
<br /> (62) 3/31/1999 [P] 11.57 26.69 -15.12 E-SE <50 <0.50 <0.50 <0.50 <0.50 <5 No FP,No S,No O
<br /> (62) 8128/1999 [P] 11.57 27.66 -18.09 S€ <50 <0.50 <0.50 <0.50 <0.50 <5 No FP,No S,No O
<br /> (62) 9110/1999 ]P] 11.57 29.54 -17.97 E <50 <0.50 <0.50 <0.50 <0.50 <5 No FP,No S,No 0
<br /> (62) 12/13/1999 (P] 11.57 28.80 -17.23 E <50 <0.50 <0.50 <0.50 <0.50 <2.5 No FP,No S,No O
<br /> (62) 312 812 0 0 0 [P] 11,57 25.71 -14.14 SE <50 <0.50 <0.50 <0.50 <0.50 <2.5 No FP,No S,No O
<br /> (63) 6/26/2000 [P] 11.57 26.53 -14.96 E <50 <0,50 <0.50 <0.50 <0.50 <2.0[2] No FP,No S,No O
<br /> 9/2=000 [P] 11.57 28.94 -17.37 E-NE <50 <0.50 <0.50 <0.50 <0.50 <2.5 No FP,No S,No O
<br /> 12118/2000 [P] 11.57 27.75 -16.18 E <50 <0.50 <0.50 <0.50 <0,50 <2[2] No FP,No S,No O
<br /> 3/14/2001 [P] 11.57 26.42 -14.85 E <50 <0.50 <0.50 <0.50 <0.50 <1.0 No FP,No S,No O
<br /> 6/19/2001 [P] 11.57 27.26 -15.69 E <50 <0.50 <0.50 <0.50 <0.50 <2[2] No FP,No S,No O
<br /> 9/11/2001 [P] 11.57 29.65 -18.08 E <50 <0.50 <0.50 <0.50 <0.50 <2[2] No FP,No S,No O
<br /> 1211=001 [P] 11.57 29.10 -17.53 E-NE <50 <0.50 <0.50 <0.50 <0.50 <0.50[2] No FP,No S,No O
<br /> W12/2002 [P] 11.57 27.40 -15.83 E <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 E <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 $1.03 -19.46 NE <50 <0.50 <0.50 <0,50 <0.50 <0.5 No FP,No S,No O
<br /> 12/4/2002 P 11.57 31.00 -19.43 NE <50 <0.50 <0.50 <0,50 <0.50 <0.5 No FP,No S,No 0
<br /> 3/3/2003 p 11.57 29.34 -17.77 SE <50 <0.50 <0.50 <0.50 <0.50 <0.5(2] No FP,No S,No O
<br /> 6/3/2003 P 11.57 29.04 -17.47 SE <50 <0.50 <0.50 <0.50 <0.50 <0.5[2] No FP,No S,No O
<br /> 9118/2003 P 11.57 32.60 -21.03 SE <50 <0.50 <0.50 <0,50 <0.60 <0.50[2] No FP,No S,No O
<br /> K:MprooessU5 BP AR=0054850uartedyl3 OTR 0310548 OW 3QO3 Page 4 of 10
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