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Page 12 of 17 <br /> Table 1 <br /> Groundwater Elevation and Analytical Data <br /> ARCO Seance Slat€on#2093 <br /> 3425 Tracy Boulevard,Tracy CA <br /> Well Depth Groundwater Groundwater Product Ethyl Xylenes <br /> Well Date Elevation to Water Elevation Elevation Th€ckness TPHg Benzene Toluene benzene (total) MtBE 00 <br /> Number Sampled (I MSL) (ft TOC) (ft,MSL) Change(ft) (it) (ug/L) (ug/L) (ug/L) (ug/L) (ug/L) (ug/L) mg/L) <br /> ATR 9 9/16/1999 NP 11 74 3694 024 <50 <05 <0 5 <0 5 <0 5 <5 0 4 3 <br /> (cont) 12/22/1999 NP 11 61 3707 013 — — 1 99 <br /> 2/29/2000 NP 11 04 37 64 0 57 <50 <05 <05 <0 5 <05 <2 5 4 3 <br /> 6/7/2000 Well€naccess€b1e <br /> 9/25/2000 Well€naccess€bte <br /> 12/21/2000 Well inaccessible <br /> 3/27/2001 P 11 40 37 28 -036 <50 0 <0 500 <0 500 <0 500 <0 500 <2 00 3 2 <br /> 6/20/2001 11 47 37 21 007 .- <br /> 9/1212001 P 11 50 37 18 0 03 — <50 <0 50 <0 50 <0 50 <0 50 19 1 4 <br /> 12/19/2001 11 40 3728 010 <br /> 3/14/2002 P 1151 3717 Oil <50 <05 <0 5 <0 5 <0 5 <0 50 083 <br /> 6/28/2002 <br /> 9/11/2002 P 11 41 3727 <50 <0 5 <0 5 <0 5 <0 5 <0 5' 1 5 <br /> 12/17/2002 — .- _ <br /> 3/31/2003 P 1138 3730 — — <50 <0 5 <0 5 <0 5 <0 5 <05 1 1 <br /> 819!2003 1098 3770 040 — Not Sampled <br /> ATR 10 10/16/1990 48 07 -- — <50 <0 5 <0 5 <0 5 <0 5 <br /> 10/19/1990 1020 37 137 — _ _ _ <br /> 1/10/1991 1007 3800 013 <50 <0 5 <0 5 <0 5 <0 5 <br /> 4/10/1991 1000 3807 0 07 <50 <0 5 <0 5 <0 5 <0 5 <br /> 7/12/1991 1021 3786 0 21 — <50 <0 5 <0 5 <0 5 <0 5 <br /> 9/24/1991 1032 3775 Oil — -- _ _ <br /> 9125/1991 <50 <0 5 <0 5 <0 5 <0 5 <br /> 1/23/1992 1000 38 07 — — <50 <0 5 <0 5 <0 5 <0 5 <br /> 4/20/1992 1001 3806 0 01 — -- — _ <br /> 4/21/1992 — — <50 <0 5 <0 5 <0 5 <0 5 — <br /> 7/8/1992 1017 3790 — — <50 <0 5 <0 5 <0 5 <0 5 <br /> 10/7/1992 1023 $784 006 — <50 <05 <0 5 <0 5 <0 5 <br /> 1/18/1993 9 61 38 46 062 — <50 <0 5 <0 5 <05 <05 — <br /> 4/14l1993 9 94 $813 033 <50 <0 5 <05 <0 5 <05 -- <br /> 8/30/1993 1023 3784 -0 29 <50 <0 5 <0 5 <0 5 <0 5 -- <br /> 10/27/1993 10 24 3783 0 01 <50 <0 5 <0 5 <0 5 <0 5 -- <br /> 2/18/1994 1002 3805 0 22 <10 <0 3 0 4 <0 3 <0 5 <br /> 5/20/1994 1009 3798 007 <10 <0 3 <03 <0 3 <0 5 <br /> 10/7/1994 1024 3783 015 <50 <0 5 <0 5 <0 5 <0 5 <br /> 12/16/1994 9 97 3810 027 <50 <0 5 <0 5 <05 <0 5 <br /> 2/28/1995 1015 3792 018 <50 <0 5 <0 5 <0 5 <0 5 <br /> 4/25/1995 1027 37 80 012 <50 <0 5 <05 <0 5 <0 5 <br /> 7/27/1995 1038 3769 Oil — _ -, — _ <br /> 10/26/1995 1041 3766 003 -- _ _ <br /> 2/12/1996 1001 3806 040 — <50 <0 5 <0 5 <0 5 <0 5 <br /> 4/18/1996 1023 3784 -022 — — — _ <br /> 7/18/1996 1040 37 67 017 — <50 <0 5 <0 5 <05 <05 <5 0 <br /> 11/15/1996 1093 3714 053 — — -. — <br /> 3/14/1997 <br /> 6/4/1997 -- <br /> B/11/1997 NP 1056 3751 — <50 <0 5 <0 5 <0 5 <0 5 <2 5 — <br /> N1WprwmU3 BP ARGO5020931Qwter€lA2 QTR 0352093 OWMR 2003 <br />