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40.9e1of 16 <br /> Table t <br /> Groundwater Elevation and Analytical Hata <br /> ARCO Service Station#2093 <br /> 3425 Tracy Blvd Tracy CA <br /> Wel} Depth Groundwater Groundwater Product Ethyl Xylenes <br /> W0 Date Elevation to Water Elevation Elevation Thickness TPHg Benzene Toluene benzene (total) MtBE DO <br /> Number Sampled (ft MSL) (It TOC) (it MSL) Change{ft) (ft) (ppb) (ppb) (ppb} (ppb) (ppb) (ppb) OWL) <br /> ATR 1 4/23/1987 5058 1249 3809 <100 <0$ <0 5 <0 5 23 <br /> 12/22/1987 12 63 3795 014 5 9 <0 5 0 9 <0 5 <br /> 3/24/1988 1254 38 04 009 <0 5 <0 5 <0 5 <0 5 — <br /> 6/23/1988 12 83 3775 029 <0 5 1 3 4 3 2 2 <br /> 9/29/1988 1301 37 57 018 — <0 5 <0$ <0 5 <0 5 — <br /> 2/22/1989 1246 36 12 0 55 <100 1 4 <0 5 <0 5 1 8 <br /> 6/21/1989 1237 3821 009 520 360 0 8 2 1 36 <br /> 9/18/1989 1288 3770 0 51 — 27 000 250 1 200 570 7,100 _ <br /> 12/27/1989 1258 3790 020 -- <50 3 4 <0 3 1 3 1 4 <br /> 4/18/1990 1284 37 74 016 13 21 1 5 16 16 <br /> 10/1611990 <50 1 <0 5 2 2 <br /> 10/19/1990 1310 3748 — <br /> 1/10/1991 1276 3780 032 <50 2 4 <0 5 5 7 2 3 <br /> 4/10/1991 12 52 3806 026 73 1 3 <0 5 4 a <0 5 _ <br /> 7/10/1991 12 95 3763 043 90 2 <0 5 4 7 1 7 — <br /> 9/24/1991 1330 3728 036 <50 <0 6 <0 5 <0 5 <0 5 <br /> 1/2311092 1277 3781 0 53 <50 <0 5 <0 5 <0 5 <0 5 <br /> 4/20/1992 12 58 3800 019 <50 <0 5 <0 5 <0 5 <0 5 <br /> 7/8/1992 1290 3768 0 32 — <50 <0 5 <0 5 0 6 <0 5 <br /> 10!711992 1309 37 49 0 19 — <50 <0 5 <0 5 <0 5 <0 6 <br /> 1118193 <br /> 4/14/1993 1231 3627 — <50 <0 5 <0 5 1 5 <0 5 <br /> 8/30/1993 1318 3740 0 87 <50 <0 5 <0 5 <0 5 <0 5 <br /> 10/27/1993 1313 3745 005 <50 <0 5 <0 5 <0 5 <0 5 <br /> 2/18/1994 12 65 3793 048 17 0 6 1 1 0 8 — <br /> 5/20/1994 12 71 37 87 006 27 0 6 0 3 1 4 <0 5 <br /> 10/7/1994 1314 3744 043 <60 <0 5 <0 5 <0 5 <0 5 <br /> 12/16/1994 1274 3784 040 <50 <0 5 <0 5 <0 5 <0 5 <br /> 2/28/1995 1265 3793 009 — <50 <0 5 <0 5 1 <0 5 <br /> 4/26/1995 12 90 37 68 0 25 <50 <0 5 <0 5 <0 5 <0 5 <br /> 7/27/1995 1322 3736 0 32 <br /> 10/26/1995 1340 3718 018 _ <br /> 10/27/1995 <50 <0 5 <0 5 <0 5 <0 5 <br /> 2/1211996 12 30 3828 120 <0 5 <0 5 2 2 <0 5 <br /> 4/18/1996 1290 3768 0 60 — <br /> 7!1811996 1,328 3730 038 <50 <0 5 <0 5 <0 5 <0 5 <5 <br /> 11/15/1996 1374 36 84 046 — _ <br /> 3/14/1997 NP 1368 3690 006 <50 <0 5 <0 5 <0 5 <0 5 — 030 <br /> 6!411997 13 04 3754 0 64 — 022 <br /> 8/11/1997 NP 13 43 3715 0 39 <50 <0 5 <0 5 <0 5 <0 5 23 <br /> 11/17/1997 1329 3729 014 <br /> 3/30/1998 NP 12 58 3800 0 71 <50 <0 5 <0 5 <0 5 <0 5 <50 200 <br /> 6/2511998 1366 3702 098 <br /> 9/11/1998 NP 1320 37 38 0 36 — <50 <0 5 <0 5 <0 5 <0 5 <2 5 104 <br /> 12/15/1998 1302 37 56 0 is — — 1 30 <br /> 3/17/1999 NP 1279 3779 023 <50 <0 5 <0 5 <0 5 <0 5 <50 510 <br /> 5/14/1999 1306 37 52 -027 — -- 2 20 <br /> 9!1811999 NP 1336 3722 030 <50 <0 5 <0 5 <0 5 <0 5 <5 0 330 <br /> K%A SP ARC0102040i0 wt*rt63 OTR 0ZTab4*t_2_3 kb <br />