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Page 8 of 17 <br /> Table 1 <br /> Groundwater Elevation and Analytical Data <br /> ARCO Service Station#2093 <br /> 3425 Tracy Boulevard Tracy CA <br /> Wall Depth Groundwater Groundwater Product Ethyl Xylenes <br /> Well Date Elevation to W ater Elevation Elevation Thickness TPHg Benzene Toluene benzene (total) MtBE DO <br /> Number Sam ted (ft MSL) (ft TOC) ft MSL) Change(h) (ft) (ug/L) (u /L) u /L (ug/L} (uglL) ug/L) (mglL) <br /> ATR 6 5/20/1994 _ — „ <br /> (cant} 10/7/1994 11 85 3750 <50 <0 5 <0 5 <0 5 <0 5 <br /> 12/16/1994 1154 3781 0 31 <50 <0 5 <0 5 <0 5 <0 5 » <br /> 2/28/1995 11 65 3770 Oil <50 <0 5 <0 5 <0 5 <0 5 <br /> 4/26/1995 -- — — <br /> 712711995 -- — _ _ <br /> 10/26/1995 1218 3717 — <50 <0 5 <05 <05 <0 5 — — <br /> 2/12/1996 11 57 3778 0 61 <50 <0 5 <0 5 <0 5 <0 5 — <br /> 4/18/1996 11 91 37 44 0 34 — — <br /> 7/18/1996 1201 37 34 010 <50 <0 5 <0 5 <0 5 <0 5 10 <br /> 11/15/1996 1263 36 72 062 — — _ — <br /> 3/14/1997 -- — — _ _ <br /> 6/4/1997 12 01 3734 — -- 0 14 <br /> 8/11/1997 NP 1223 3712 022 <50 <0 5 <0 5 <0 5 <0 5 56 <br /> 11/17/1997 1224 3711 0 01 » — _ — <br /> 3/30/1998 NP 11 69 3766 0 55 — <50 <0 5 <05 4 5 <0 5 41 1 9 <br /> 6/25/1998 11 97 3738 0 28 <br /> 9/11/1998 NP 1208 3727 Oil <50 <0 5 <0 5 <0 5 <0 5 <5 0 1 27 <br /> 12/15/1998 11 95 3740 013 -- _ _ 0 9 <br /> 3/17/1999 NP 11 86 3749 009 <50 <0 5 <05 <05 <0 5 <50 1 9 <br /> 5/14/1999 1201 3734 0 15 — -- -- 2 4 <br /> 9/16/1999 NP 12 17 9718 016 <50 <0 5 <0 5 <0 5 <0 5 <5 0 5 3 <br /> 12!2211999 1206 37 29 Oil — — — — 2 2 <br /> 2/29/2000 NP 11 65 37 70 0 41 — <50 <0 5 <0 5 <0 5 <0 5 107 5 0 <br /> 6/7/2000 NP 1210 .3725 045 <br /> 9/25/2000 NP 1222 3713 012 <50 <0 5 <05 <0 5 <05 <2 50 070 <br /> 12/29/2000 1200 3735 022 -- — — 51 <br /> 3/27/2001 P 11 93 3742 007 <50 0 <0 500 <0 500 <0 500 <0 500 521 4 1 <br /> 6/20/2001 1204 3731 Oil » — <br /> 9/12/2001 P 1203 3732 0 01 <50 <0 50 <0 50 <0 50 <0 50 12 1 8 <br /> 12!19/2001 11 95 37 40 0 08 » <br /> 3/14/2002 P 11 97 3738 002 <50 <0 50 <0 50 <0 50 <0 50 Is. 0 86 <br /> 6/27/2002 — <br /> 9/11/2002 P 1200 3735 — <50 <0 5 <0 5 <0 5 <0 5 068 1 4 <br /> 12/17/2002 — — -- <br /> 3/31/2003' P 11 92 3743 — <50 <0 5 <05 <0 5 <0 5 1 2 0 9 <br /> 6/9/2003 1162 37 73 0 30 — Not Sampled <br /> ATR 7 3/10/1989 49 65 — -- <200 <0 5 <05 <0 5 1 7 -- <br /> 6/21/1989 11 90 3775 — <50 1 0 <0 3 0 6 0 5 — <br /> 9/16/1989 11 98 37 67 008 <50 0 4 <0 3 <0 3 1 1 — <br /> 12/27/1989 11 94 3771 0 04 90 10 0 9 2 7 7 9 — <br /> 4/18/1990 1201 3764 007 <50 6 1 2 6 2 1 5 8 <br /> 10/1611990 <50 <05 <0 5 <0 5 <0 5 <br /> 10/19/1990 1220 3745 — — » -.. _ _ <br /> 1/10/1991 — — <50 6 0 <0 5 1 8 41 — <br /> 4/10/1991 <br /> 7111)11991 <br /> K SWprwa W SP ARGMQ2083401uar[erW QTR 0312003 Q MIR 2000 <br />