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c <br /> Page 9 of 17 <br /> Table 1 <br /> Groundwater Elevation and Analytical Data <br /> ARCO 5ervice Statlon#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) MTBE DO <br /> Number--sampled (it,MSL) (H TOC) (ft MSL) Change(H) (tt) (ug/L) ug/L) u IL ug/L) (uglL) (ug1L) (mg/L) <br /> ATR 7 9/24/1991 1234 3731 — — — — <br /> (cont) 9/25/1991 -- — — <50 1 3 <0 5 <0 5 <0 5 <br /> 1/23/1992 — » » <br /> 4/20/1992 — _ <br /> 7/8/1992 » — <br /> I OR11992 1221 3744 — -- -- — _ <br /> 10!8/1992 — <50 <0 5 <0 5 <05 <0 5 <br /> 1/18/1993 11 33 3832 — » <br /> 1/19/1993 — <50 1 0 <0 5 0 6 <0 5 <br /> 4/14/1993 11 75 3790 — — <br /> 4/15/1993 <50 2 9 <05 <0 5 <0 5 <br /> 8/31/1993 12 24 37 41 — <50 <0 5 <0 5 <0 5 <0 5 <br /> 10/27/1993 1223 3742 0 01 <50 <0 5 <0 5 <0 5 1 3 — <br /> 2/18/1994 11 93 37 72 0 30 <10 <0 3 <0 3 <0 3 <0 5 <br /> 5/20/1994 1200 37 65 007 <10 <0 3 <0 3 <0 3 <0 5 — <br /> 10/7/1994 1223 3742 023 <50 <05 <05 <0 5 <0 5 — <br /> 12/1$11994 11 94 37 71 029 <50 <0 5 <0 5 <0 5 <05 — <br /> 2/28/1995 1200 37 65 006 <50 <0 5 <0 5 <0 5 <0 5 — — <br /> 4/25/1995 1241 37 24 0 41 <50 <0 5 <05 <0 5 <0 5 <br /> 7/27/1995 1261 3704 020 <50 <0 5 <0 5 <0 5 <05 — <br /> 10/26/1995 1267 36 98 006 <50 <0 5 <0 5 <0 5 <0 5 — <br /> 2/12/1996 11 95 3770 0 72 <50 <05 <0 5 <0 5 <0 5 — <br /> 4/18/1996 1235 3730 040 <50 <0 5 <0 5 <0 5 <05 <br /> 7!16!1996 1245 3720 010 <50 <05 <0 5 <0 5 <0 5 28 <br /> 11/15/1996 1311 36 54 066 <50 <05 <0 5 <0 5 <0 5 120 <br /> 3/14/1997 13 20 3545 009 <50 <05 <0 5 <0 5 <0 5 63 0 1 <br /> 6/4/1997 NP 1244 37 21 076 » <50 <0 5 <0 5 <0 5 <0 5 <2 5 013 <br /> 8/11/1997 NP 1272 3693 028 <50 <0 5 <0 5 <0 5 <0 5 22 <br /> 11/17/1997 NP 1266 3699 006 <50 <0 5 <0 5 <0 5 <0 5 3 5 <br /> 3/30/1998 NP 1211 3754 0 55 <50 <0 5 <0 5 <0 5 <0 5 <5 0 1 3 <br /> 612 511 9 9 8 NP 1246 3719 035 <50 <0 5 <0 5 <0 5 <0 5 <5 0 2 5 <br /> 9/11/1998 NP 1251 3714 0 05 <50 <05 <0 5 <0 5 <0 5 <2 5 1 14 <br /> 1 2/1 511 998 NP 1241 37 24 010 — <50 <0 5 <05 <0 5 <0 5 <50 2 2 <br /> 3/17/1999 NP 12 23 .3742 018 — <50 <05 <05 <0 5 <05 <50 2 0 <br /> 5/14/1999 NP 1241 3724 018 <50 <05 <05 <0 5 <0 5 <50 1 9 <br /> 9/16/1999 NP 1258 $707 017 <50 <05 <05 <0 5 <05 <50 36 <br /> 1 212 2/1 99 9 NP 1252 $713 0 06 <50 <05 <0 5 <0 5 <0 5 <2 50 42 <br /> 2/29/2000 NP 1206 3759 046 <50 <0 5 <0 5 <0 5 <05 <2 50 4 7 <br /> 6/7/2000 NP 1255 3710 049 <50 <0 5 <05 <0 5 <0 5 572 -- <br /> 9/25/2000 NP 1271 3694 016 <50 <05 <05 <0 5 <0 5 <2 50 05 <br /> 12/29/2000 P 1243 3722 028 <50 0 <0 500 <0 500 <0 500 0 656 17 5' 6 7 <br /> 3/27/2001 P 12 33 3732 010 <50 0 <0 500 <0 500 <0 500 <0 500 305 3 8 <br /> 6/2012001 P 1247 3718 -014 <50 <0 50 <0 50 <0 50 <0 50 580' <br /> 9/12/2001 P 1250 3715 -003 <50 4 50 <0 50 <0 50 <0 50 140 1 2 <br /> 12/19/2001 P 1235 3730 015 — <50 <0 50 <0 50 <0 50 <0 50 7 2 1 01 <br /> 3/14/2002 P 1242 37 23 -007 <50 <0 50 <0 50 <0 50 <0 50 14' 066 <br /> 6/26/2002 P 1248 3717 0 06 <50 <0 50 <0 50 <0 50 <0 50 0 97' 3 6 <br /> 911/12402 P 1244 37 21 004 <50 <0 50 <0 50 <0 50 <0 50 1 1• 2 9 <br /> K Mproae W BP ARBm020B31QualWW 0717 W2093 OMR 2003 <br />