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Page 4 of W <br /> Table 1 f <br /> Groundwater Elevation and Analytical Data <br /> ARCO Service Station#2093 <br /> 3425 Tracy Boulevard,Tracy CA <br /> Well Depth Groundwater Groundwater Product Ethyl Xylenes <br /> Well Date Elevation to Water Elevation Elevation Thickness TPHg Benzene Toluene benzene (total) M1BE DO <br /> Number Sampled (ft MSL) (tt,TOC) (tt MSL) Change{fl) (ft) (uglL) ug/L) (ug/L) u !L <br /> (uglL) (ug/L) (mg/L) <br /> ATR 3 7/811992 12 22 37 71 0 29 seen <br /> (cont) 10/7/1992 1238 3755 0 16 sheen <br /> 1/18/1993 1122 3871 116 sheen <br /> 4/14/1993 11 49 3844 027 sheen — <br /> 8130/1993 1243 3750 0 94 sheen _ <br /> 10/27/1993 1239 3754 004 sheen — — -- _ <br /> 2/18/1994 1200 3793 0 39 — 1 900 200 27 120 140 <br /> 5/20/1994 1207 3766 007 sheen -- — <br /> 10/7/1994 1238 3755 -031 sheen — — -- <br /> 12/16/1994 1203 3790 035 sheen — — <br /> 21281W 1205 3790 000 003 <br /> 4/26/1995 12$2 3761 -0 29 sheen — <br /> 7/27/1995 12 51 3742 019 <br /> 1 012 611 995 (a) 12 97 <br /> 2f12/1996 1210 — 087 — 1 500 89 <0 5 43 150 — <br /> 4/18/1996 1260 -- 050 — - _ <br /> 7/18/1996 1260 -- 0 00 1,600 26 5 2 70 51 1,800 <br /> 11/15/1996 1340 080 -- -- — — _ _ <br /> 3/1411997 NP 1334 006 -- 1,200 10 <0 5 43 19 620 005 <br /> 8/4/1997 1270 064 -- -- -- — — -- -- 015 <br /> 811111997 NP 1272 — 002 — 3,400 20 <10 160 110 <50 -- <br /> 11/17/1997 1293 021 — — — _ -- <br /> 3/30/1998 NP 1218 075 — 8400 <2 5 <2 5 100 52 120 0 8 <br /> 6/25/1998 1241 -023 — — -- -- — _ -- <br /> 9/11/1998 NP 1284 — -0 43 1 100 61 <05 25 22 41 1 23 <br /> 12/15/1998 1160 — 124 -- — — .- _ 21 <br /> 3/17/1999 NP 1 2 41 081 — 652 1 41 <0 5 11 7 7 29 164 78 <br /> 5/14/1999 1270 029 — — — -- -- — — 120 <br /> 9/16/1999 NP 1279 009 2 800 175 <5 0 499 151 523 1 9 <br /> 12/22/1999 f2 76 003 — — -- 037 <br /> 2!2912000 NP 1210 065 405 235 <1 00 515 1 18 2,160 3 6 <br /> 6!7/2000 NP 1281 -071 — -- — <br /> 9/25/2000 NP 1301 020 -- 2,350 <2 50 565 269 840 464 060 <br /> 12/29/2000 11 47 1 54 -- -- — — 4 2 <br /> 3/27/2001 P 1249 -t 02 <50 0 <0 500 <0 500 <0 500 <0 500 526 3 2 <br /> 8/20/2001 1265 -016 -- — -- _ <br /> 9/12/2001 P 1271 -- -006 54 0513 1 0 056 2 5 83 2 5 <br /> 12!1912001 1256 — 015 — -- _ _ _ <br /> 3/1412002 P 1257 -001 -- 2300 <10 10 <10 <10 <5 0 1 28 <br /> 6/28/2002 -- — _ <br /> 911 112 0 0 2 P 1278 -- 51 <0 5 <0 5 <0 5 <0 5 <0 5" 2 9 <br /> 12/17/2002 — -- — <br /> 3!3112003 P 1256 3737 — -- 150 <0 5 <0 5 <0 5 <0 5 5 2 2 8 <br /> 6/9/2003 1047 3946 209 -- Not Sampled <br /> ATR 4 4/23/1987 49 03 1085 3818 — -- 21 000 3,000 200 <10 950 <br /> 12/22/1987 1100 38 03 -015 — 5,300 310 430 270 <br /> 3/24/1988 1098 38 05 002 6,000 5,800 320 930 740 <br /> 6/23/1988 1211 3692 1 13 5,200 237 88 20 10 <br /> 9/29/1988 1072 3831 1 39 1,400 1,430 115 350 130 <br /> 2/22/1989 1091 3812 019 — 22 000 1,300 82 54 170 <br /> 60;1989 1100 38 03 009 1 300 590 38 97 220 — <br /> K Mpr-®J5 8P ARC0%Q20331QuaiwW OTR MM QSHMR 2QO3 <br />