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• • 'Pa <br /> g 4 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 (ft,MSL) (ft,TOC) (ft MSL) Change(ft) (ft) -(ppb) (ppb) (ppb) (ppb) (ppb) (ppb) (mg/L) <br /> ATR-2 12/29/2000 P 1203 $719 008 - <50 0 <0 500 <0 500 <0 500 <0 500 89` 5 6 <br /> (cont) 3/27/2001 P 11 92 3730 Oil - <50 0 <0 500 <0 500 <0 500 <0 500 37 2• 4 1 <br /> 6/20/2001 P 1203 3719 Oil -- <50 <0 50 <0 50 <0 50 <0 50 96` <br /> 9/12/2001 P 1218 3704 -015 <500 <5 0 <5 0 <5 0 <5 0 500 2 9 <br /> 12119/2001 P 1197 3725 0 21 <500 <5 0 <5 0 <5 0 <5 0 250' 082 <br /> 3/14/2002 P 1200 3722 003 - <500 <5 0 <5 0 <5 0 <5 0 98` 082 <br /> 6/28/2002 P 1212 3710 •012 170 <0 5 <0 5 <0 5 <0 5 300 1 5 <br /> ATR-3 4/23/1987 4993 1179 3814 - 17,000 2,300 180 <5 0 2,300 -- -- <br /> 12l22/1987 1193 3800 -014 - -- 5 000 50 530 250 <br /> 3/24/1988 1258 3735 -065 43,000 8,300 8,700 4,400 7,800 -- <br /> 6/23/1988 11 17 3876 141 70,000 6 160 4,221 1,800 4,750 <br /> 9/29/1988 1223 3770 -106 - 57,400 8,850 17,600 2,190 8,170 <br /> 2/22/1989 1182 3811 0 41 110,000 1,000 2,100 480 2,000 <br /> 6/29/1989 -- -- - 4,500 890 520 250 1,100 <br /> 9/18/1989 1219 3774 -- 7,400 1,000 1,300 460 2,200 <br /> 12/28/1989 1201 37 92 018 -- 27,000 840 1,400 840 5,600 <br /> 4/18/1990 1215 3778 -014 4,800 1,000 490 340 1,500 . <br /> 10/16/1990 1235 3758 -020 - 14,000 1900 1,300 780 4,600 <br /> 1019/1990 1228 3765 0071/1011991 1201 37 92 027 2,600 610 230 160 670 <br /> 4/10/1991 1182 3811 019 3,000 910 120 110 190 <br /> 7/10/1991 1223 3770 -0 41 - 19,000 420 300 340 760 - <br /> 9/24/1991 1257 3736 -034 - 2,000 280 81 69 130 <br /> 1/23/1992 1212 3781 045 sheen -- _- .. - <br /> 4/20/1992 1193 3800 019 sheen .. <br /> 7/8/1992 1222 37 71 -0 29 sheen .. <br /> 10/7/1992 1238 3755 -016 sheen - - <br /> 1/18/1993 1122 3871 1 16 sheen <br /> 4/14/1993 1149 3844 -027 sheen - <br />, 8/30/1993 1243 3750 -0 94 sheen <br /> 10/27/1993 1239 3754 004 sheen ._ -- <br /> 2/18/1994 1200 3793 039 1,900 200 27 120 140 <br /> 5/20/1994 1207 37 86 -007 sheen -- _- <br /> 10/7/1994 1238 3755 0 31 sheen - <br /> 12/16/1994 1203 3790 0 35 sheen <br /> 21281W 1205 3790 000 003 - <br /> 4/26/1995 1232 3761 -029 sheen - <br /> 7/27/1995 1261 3742 -019 - <br /> K V5 BP A8C01020935Quarterlyl2 QTR 027able 1-2_3;ds <br />