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s � • J <br /> Page 41 of 17 <br /> Table 1 <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 /> Welt Date Elevation to Water Elevation Elevation Thickness TPI-Ig Benzene Toluene benzene (total) MtBE DO <br /> Number Sampled (ft MSL ft TOC) (ft MSL) Change(q) (ft) (uglL) (ug/L) ((ug/L (ugIL) (ug/L) (ug/L) (mg/LL <br /> ATR 8 9/12/2001 P 911 3700 012 810 13 3 7 4 4 8 4 <25 1 7 <br /> (cont) 1211912001 P 878 3733 033 — 380' 0 81 <0 50 2 5 1 5 21 048 <br /> 3/14/2002 P 880 37 31 0 02 — 170 <0 50 <0 50 0 71 <0 50 <0 50 072 <br /> 6/28/2002 P 9 10 3701 030 260 0 79 0 56 27 <0 5 0 82 1 0 <br /> 9/11/2002 P 914 36 97 004 150 3 0 0 7 4 2 1 4 0 73 2 3 <br /> 12/17/2002 P 8 33 3778 0 81 — 420 <2 0 <2 0 64 7 6 1 7 1 4 <br /> 3/31/2003 P 875 3736 042 260 <0 50 <0 5 0 56 <0 50 1 1 0 8 <br /> 6/9/2003 P 8 81 3730 -006 — 220 <0 50 0 61 1 1 9 <0 50 <0 5o 4 3 <br /> ATR 9 10/16/1990 48 68 — — <50 <0 5 <0 5 <0 5 <0 5 — <br /> 10/19/1990 11 11 3757 — — -- — <br /> 1/10/1991 11 04 3764 007 — <50 <0 5 <0 5 <0 5 <0 5 — <br /> 4/10/1991 1082 9786 0 22 — <50 <0 5 <0 5 <0 5 <0 5 <br /> 7/10/1991 1106 3762 0 24 — <50 <0 5 <0 5 <05 <0 5 <br /> 9/24/1991 1129 3739 023 — -- » — <br /> 9/25/1991 — <50 <0 5 <0 5 <05 <0 5 — — <br /> 1/23/1992 1096 3772 -- <50 <0 5 <0 5 <0 5 <0 5 » <br /> 4/20/1992 1088 3780 008 — -- — — <br /> 4/21/1992 — <50 <0 5 <0 5 <0 5 <0 5 <br /> 701992 11 06 37 62 — <50 <0 5 <0 5 <0 5 <0 5 <br /> 10/7/1992 11 16 3752 010 <50 <0 5 <0 5 <0 5 <0 5 » <br /> 1/18/1993 1034 3834 082 — <50 <0 5 <0 5 <0 5 <0 5 » <br /> 4/14/1993 1070 3798 -0 36 — <50 <0 5 <0 5 <0 5 <0 5 <br /> 8/30/1993 11 17 37 51 047 -- <50 <0 5 <0 5 <0 5 <0 5 — <br /> 10/27/1993 1123 3745 006 — <50 <0 5 <0 5 <0 5 0 7 — — <br /> 2/17/1994 1089 3779 034 - — -- <br /> 2/18/1994 — <10 <0 3 0 4 <0 3 <0 5 — <br /> 5/20/1994 10 97 3771 — <10 <03 <0 3 <0 3 <0 5 <br /> 10/7/1994 11 19 3749 0 22 <50 <0 5 <0 5 <0 5 <0 5 <br /> 12/16/1994 1091 37 77 028 <50 <05 <0 5 <0 5 <05 — <br /> 2126/1995 1093 37 75 002 <50 <0 5 <0 5 <05 <05 <br /> 4/25/1995 11 46 3722 0 53 <50 <05 <0 5 <0 5 <0 5 <br /> 7/27/1995 11 73 36 95 027 — — <br /> 10/26/1995 11 80 3668 007 <50 <05 <0 5 <0 5 <0 5 <br /> 2112/1996 1090 37 78 090 <50 <0 5 <0 5 <0 5 <0 5 <br /> 4/18/1996 11 30 3738 040 — <br /> 7/18/1996 11 68 3700 038 <50 <05 <0 5 <05 <05 <50 <br /> 11/15/1996 1223 3645 055 — » -- — — <br /> 311411997 NP 1223 3645 000 <50 <0 5 <0 5 <05 <05 0 2 <br /> 6/4/1997 11 52 3716 0 71 — 0 4 <br /> 8/11/1997 NP 11 86 3682 -034 <50 <05 <0 5 <0 5 <05 <2 5 <br /> 11/17/1997 11 72 3696 014 — - <br /> -3/3011998 NP 11 10 37 58 062 <5o <0 5 <0 5 <0 5 <05 <5 01<2 0 2 40 <br /> 6/25/1998 11 51 3717 0 41 -- -- <br /> 9/11/1998 NP 11 65 3703 014 — <50 <0 5 <0 5 <0 5 <0 5 <2 5 1 81 <br /> 12/15/1998 1153 3715 012 -- — — -- -- 17 <br /> 3/17/1999 NP 11 25 3743 028 — <50 <0 5 <05 <05 <05 <5 0 1 6 <br /> 5114/1999 NP 11 50 3718 0 25 — -- — 2 4 <br /> KjWprooea W BP ARC00209MQu WhA2 QTR CM--W3 OWMR 2QM <br />