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Page 10 of 20 <br /> Table 1 <br /> Groundwater Elevation and Analytical Data <br /> ARCO Service Station#2093 <br /> 3425 Tracy Blvd,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) (ft,TOC) (ft MSL) Change(ft) (ft) (ppb) (ppb),. , ,._ (Epb) (ppb) (ppb) (ppb) (mg1L) <br /> ATR-6 6/25/1998 —-- 11 97 3738 -0 28 - -- - -- -- - - <br /> (cont) 9/11/1998 NP 1208 3727 -011 <50 <0 5 <0 5 <0 5 <0 5 <5 0 127 <br /> 12/15/1998 1195 3740 013 -- -- -- - 0 9 <br /> 3/17/1999 NP 11 86 3749 009 <50 <0 5 <0 5 <0 5 <0 5 <5 0 19 <br /> 5/14/1999 1201 3734 -015 -- -- -- -- -- 2 4 <br /> 9/16/1999 NP 1217 3718 -016 -- <50 <0 5 <0 5 <0 5 <0 5 <5 0 5 3 <br /> 12/22/1999 1206 3729 Oil -- -- -- -- -- 2 2 <br /> 2/29/2000 NP 11 65 3770 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 <60 <0 5 <0 5 <0 5 <0 5 <2 50 070 <br /> 121299/2000 1200 3735 0 22 -- - -- -- .. 5 1 <br /> 3/27/2001 P 11 93 3742 007 <50 0 <0 500 <0 500 <0 500 <0 500 52 1* 4 1 <br /> 6/20/2001 1204 3731 -011 -- -- -- - -- _ -- <br /> 9/12/2001 P 1203 37 32 001 - <50 <0 50 <0 50 <0 50 <0 50 12 18 <br /> 12/19/2001 1195 3740 008 - - -- -- <br /> 3/14/2002 P 11 97 3738 -002 <60 <0 50 <0 50 <0 50 <0 50 18* 0 86 <br /> ATR-6 6/27/2002 -- -- -- -- — _ _ -. <br /> (cant) <br /> ATR 7 3/10/1989 4965 -- -- -- <200 <0 5 <0 5 <0 5 17 <br /> 6/21/1989 1190 3775 <60 1 <0 3 0 6 0 5 <br /> 9/18/1989 11 98 3767 -008 - <50 0 4 <0 3 <0 3 1 1 <br /> 12/27/1989 1194 3771 004 90 10 0 9 2 7 7 9 4/18/1990 1201 3764 007 <50 6 1 2 6 2 1 5 8 <br /> 10/16/1990 - -- -- <50 <05 <0 5 <0 5 <0 5 - -- <br /> 10/19/1990 1220 3745 -- -- <br /> 1/10/1991 -- -- <50 6 <0 5 1 8 4 1 - <br /> 4/10/1991 - <br /> 7/10/1991 - -- -- - <br /> 9/24/1991 12 34 3731 -- -- - <br /> 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 /> 10/7/1992 1221 3744 -- -- <br /> 10/811992 <br /> 10/8/1992 -- -- - <50 <0 5 <0 5 <0 5 <0 5 -- -- <br /> 1/18/1993 1133 3832 -- -- -- -- - .- <br /> 1/1911993 -- <50 1 <0 5 0 6 <0 5 - <br /> K\15 SP ARC"20935Qwriertys2 QTR 027able 1_2_3 Ms <br />