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• i • r , <br /> Table 1 <br /> Groundwater Elevation and Analytical Data <br /> ARCO Service Station No 2093 <br /> 3425 Tracy Blvd, Tracy, CA <br /> TO Depth to Water Level Ethyl- Total <br /> Well Date P1 Elevation Water Elevation TPHg TPHd Benzene Toluene benzene Xylenes MtBE DO <br /> Number Sampled NP (feet msl) (feet bgs) (feet msl) (pglL) (ug1L) (u91L) (ug1L) (trgIL) (pg/L) (ug1L) (mg/L) Comments <br /> ATR-2 03/12/2004 P 2103 1195 908 <50 -- <0 50 <0 50 <0 50 <0 50 0 60` 30 <br /> 06/01/2004 - 2103 1194 909 - = Not Sampled <br /> 09!20!2004 -- 2103 1212 891 <br /> Not Sampled <br /> ATR-3 4/23/1987 -- 4993 11 79 3814 17,000 -- 2,300 180 <5 0 2,300 - - <br /> 12/22/1987 - 49 93 11 93 38 00 - -- 5,000 50 530 250 - - <br /> 3/24/1988 4993 1258 3735 43,000 - 8,300 8,700 4,400 7,800 -- - <br /> 6/23/1988 -- 4993 11 17 3876 70,000 -- 6,160 4,221 1 800 4,750 - - <br /> 9/29/1988 -- 49 93 1223 3770 57,400 -- 8,850 1 17,600 2,190 8,170 -- - <br /> 2/22/1989 - 4993 11 82 3811 110,000 - 1,000 2,100 480 2000 -- <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 2,200 - - <br /> 12/28/1989 -- 4993 1201 3792 27,000 - 840 1,400 840 5,600 - - <br /> 4/18/1990 - 4993 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 /> 1011911990 -- 4993 1228 3765 -- - - -- -- -- - - <br /> 1/10/1991 - 4993 1201 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 12 23 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 /> 1017!1992 - 4993 1238 3755 -- - __ _ .. -- Sheen <br /> 1/18/1993 - 4993 1122 3871 -- - - - -- - - Sheen <br /> 4/14/1993 4993 1149 3844 -- - -- - -- - - - Sheen <br /> 8/30/1993 - 4993 1243 3750 - - -- - _. w - - Sheen <br /> 10/27/1993 - 4993 1239 3754 - - -- - - - -- Sheen <br /> 2/1811994 - 4993 1200 3793 1,900 -- 200 27 120 140 -- - <br /> 5/20/1994 -- 4993 1207 37 86 -- - - -- - -- - - Sheen <br /> 1017/1994 - 4993 1238 3755 - -- - -- -- - - Sheen <br /> 12/1611994 -- 4993 1203 3790 - -- - -- - -- -- - Sheen <br /> 2/28/1995 4993 1205 3790 - - -- - -- - -- - ",0 03 ft free product <br /> present <br /> i <br /> Report Date October 14,2004 Page 5 of 27 <br />