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• • i <br /> Page 1 of 20 <br /> Table 1 <br /> Groundwater Elevation and Analytical Data <br /> ARCO Seance 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 (ft MSL {ft,TOC} {ft,MSL Change ft (ft) (ppb)_—.., (ppb) {PPb1 (ppb) (ppb) _pb...)..,...... (mg/L.�) <br /> ATR-1 4/23/ 987 5058 1249 3809 <100 <br /> <0 5 <0 5 <0 5 23 -- <br /> 12122J 1987 1263 3795 0 14 -- -- 5 9 <0 5 0 9 <0 5 <br /> 3/24/1988 1264 3804 009 <0 5 <0 5 <0 5 <0 5 -- -- <br /> 6/23/1988 1283 3776 -029 -- <0 5 13 4 3 2 2 -- -- <br /> 9/29/1988 1301 $757 -0 18 -- <0 5 <0 5 <0 5 <0 5 -- -- <br /> 2/22/1989 1246 3812 055 <100 14 <0 5 <0 5 18 - -- <br /> 6/21/1989 1237 38 21 009 520 360 0 8 2 1 36 -- <br /> 9/18/1989 1288 3770 -0 51 27,000 250 1,200 570 7,100 -- -- <br /> 12/27/1989 1268 3790 020 <50 3 4 <0 3 1 3 1 4 4/18/1990 1284 3774 -016 13 21 16 16 16 <br /> 10/16/1990 -- -- -- <50 1 <0 5 2 2 -- <br /> 10/19/1990 1310 $748 -- - -- -- - - -- .. <br /> 1/10/1991 1278 3780 032 <50 24 <05 57 23 <br /> 4/10/1991 1252 3806 026 -- 73 1 3 <0 5 4 8 <0 5 <br /> 7/10/1991 1295 3763 -0 43 - 90 2 <0 5 4 7 17 - <br /> 9/24/1991 1330 3728 -035 - <50 <0 5 <0 5 <0 5 <0 5 <br /> 1/23/1992 12 77 $781 0 53 <50 <0 5 <0 5 <0 5 <0 5 - <br /> 4l20/1992 1258 3800 019 <60 <0 5 <0 5 <0 5 <0 5 --7/8/1992 1290 3768 -032 <50 <0 5 <0 5 0 6 <0 5 - <br /> 10/7/1992 1309 3749 -019 <50 <0 5 <0 5 <0 5 <0 5 - - <br /> 1/18l93 -- -- - <br /> 4/14/1993 1231 3827 -- <50 <0 5 <0 5 15 <0 5 <br /> 8/30/1993 1318 37 40 -0 87 - <50 <0 5 <0 5 <0 5 <0 5 <br /> 10/27/1993 1313 3745 005 -- <50 <0 5 <0 5 <0 5 <0 5 - <br /> 2/18/1994 1265 3793 048 17 0 6 1 1 0 8 <br /> 5/20/1994 1271 3787 -006 27 0 6 0 3 1 4 <0 5 - <br /> 10/7/1994 1314 37 44 -043 -- <50 <0 5 <0 5 <0 5 <0 5 - <br /> 12/16/1994 1274 3784 040 -- <50 <0 5 <0 5 <0 5 <0 5 <br /> 2/28/1995 1265 3793 009 -- <50 <0 5 <0 5 1 <0 5 <br /> 4/26/1995 1290 3768 -0 25 -- <50 <0 5 <0 5 <0 5 <0 5 - <br /> 7/27/1995 1322 37 36 -032 -- - -- -. <br /> 10/26/1995 1340 3718 -018 - -- -- -- <br /> 10/27/1995 -- -- -- <50 <0 5 <0 5 <0 5 <0 5 <br /> 2/12/1996 1230 3828 -- - 120 <0 5 <0 5 2 2 <0 5 <br /> 4/1811996 1290 3768 0 60 -- -- - -- <br /> 7/18/1996 1328 3730 0 38 -- <50 <0 5 <0 5 <0 5 <0 5 <5 <br /> 11115/1996 1374 3654 -046 - -- -- -- - - <br /> K V5 SP ARCQ1020931Q mrterly✓42 QTR 021Table 1_2 3)ds <br />