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• i ! <br /> Table 1 <br /> Groundwater Elevation and Analytical Data <br /> ARCO Service Station No 2093 <br /> 3425 Tracy Blvd, Tracy, CA <br /> TOC Depth to Water Levet Ethyl- Total <br /> Well Date P! Elevation Water Elevation TPHg TPHd Benzene Toluene benzene Xylenes MtBE DO <br /> Number Sampled NP (feet msl) (feet bgs) (feet msl) (IJ91) (pglL) (pg/L) (pg/L) (pg1L) (pg/L) (pg/L) (mg1L) Comments <br /> ATR-2 09/18/2003 P 4922 1199 3723 <50 -- <0 50 <0 50 <0 50 <0 50 94* 19 <br /> 12/24/2003 P 4922 1186 3736 <50 - <0 50 <0 50 <0 50 <0 50 14* 23 <br /> 03!1212004 P 2103 1195 908 <50 -- <0 50 <0 50 <0 50 <0 50 0 60* 3 0 <br /> 06/01/2004 - 2103 1194 909 -- - -- - -- Not Sampled <br /> 09/20/2004 - 21 03 1212 891 - -- - - - - - - Not Sampled <br /> 12113!2004 _ 21 03 1207 896 - -- - -- - -- Not Sampled <br /> 03/02120051 P 21 03 N 73 930 <50 -- <0 50 <0 50 <0 50 <0 so <0 50* 73 <br /> ATR-3 4/23/1987 -- 49 93 1179 3814 17,000 2 300 180 <5 0 2,300 -- _ <br /> 12/22/1987 4993 1193 3800 - -- 5,000 50 530 250 - -- <br /> 3/24/1988 -- 4993 1258 3735 43,000 -- 8,300 8 700 440-0 7,800 <br /> 6/23/1988 4993 11 17 3876 70,000 - 6,160 4,221 1 800 4,750 -- -- <br /> 9/29/1988 -- 4993 1223 3770 57,400 - 8,850 17,600 2,190 8,170 - -- <br /> 2l2211989 -- 4993 1182 3811 110 000 -- 1,000 2,100 480 2,000 -- - <br /> 6/29/1989 - 4993 -- -- 4,500 - 890 520 250 1,100 - <br /> 9/18/1989 4993 1219 3774 7,400 -- 1,000 1,300 460 2200 -- - <br /> 12/28/1989 -- 4993 1201 3792 27,000 - 840 1 400 840 5 600 - <br /> 4/18/1990 - 49 93 1215 3778 4,800 1,000 490 340 1,500 - -. <br /> 10/16/1990 4993 1235 3758 14 000 - 1 900 1,300 780 4,600 -- <br /> 10/19/1990 - 4993 1228 3765 -- -- -- <br /> -TI 10 11-991 <br /> -1/1011991 - 4993 12 01 3792 2 600 - 610 230 160 670 -- - <br /> 4/10/1991 - 4993 1182 3811 3,000 910 120 110 190 -- - <br /> 7/10/1991 49 93 1223 3770 19,000 420 300 340 760 - -- <br /> 9/24/1991 4993 1257 3736 2,000 -- 280 81 69 130 - - <br /> 1/23/1992 4993 1212 3781 -- - -- - -- - -- - Sheen <br /> 4/20/1992 4993 1193 3800 -- - - - - -- -- Sheen <br /> 7/8/1992 4993 1222 3771 -- - - -- - -- Sheen <br /> 10/7/1992 - 4993 1238 3755 - -- - -- -- -- - Sheen <br /> 1/18/1993 -- 4993 11 22 3871 - -- -- - -- - - Sheen <br /> 4/14/1993 -- 49 93 11 49 3844 - -- - - - -- - Sheen <br /> 8/30/1993 - 49 93 1243 3750 - -- - - -- - -- -- Sheen <br /> 10/27/1993 - 4993 1239 3754 -- - -- -- - -- - - Sheen <br /> 2/18/1994 4993 1200 3793 1900 -- 200 27 120 140 - <br /> 5/20/1994 - 4993 1207 3786 - - - -- -- - -- Sheen <br /> Report Date March 21, 2005 Page 5 of 27 <br />