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• Pa 13 of 21 <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) (ug/L) (ug1L) (ug/L) (ug/L) (ug/L) (ug/L) (mg/L) <br /> ATR 8 2117/94A 8 25 3784 054 014 -- -- - <br /> (cont) 6/20/94A 855 37 54 -030 014 -- - <br /> 10/7/94A 870 3739 -0 15 014 - -- -- -- <br /> 12/16/1994 821 3777 0 38 sheen -- -- <br /> 2/25195A 8 45 37 55 -022 002 - - - - <br /> 4/26/95A 8 51 3786 0 31 050 -- - - <br /> 7127195A 985 3622 -163 012 -- - -- <br /> 10/26/95A 928 3672 0 50 003 - -- -- -- <br /> 2/12/96A 7 87 38 13 1 40 002 -- -- -' <br /> 4/18/96A 845 3755 -058 002 -- -- -- <br /> 7/18/1996 6 95 3703 -052 - 88,000 72 220 620 2,500 <500 <br /> 11/15/1996 940 3658 -045 52,000 110 130 240 1 300 <200 -- <br /> 3/14/1997 924 3674 0 16 350 4 2 <0 5 16 26 <2 5 010 <br /> 6/4/1997 NP 869 3729 0 55 1,200 42 5 2 8 2 150 <2 5 003 <br /> 8/11/1997 NP 910 3688 -0 41 7,800 280 75 140 710 <25 -- <br /> 11/17/1997 NP -- - - 4,200 57 <0 5 <0 5 250 <2 5 - <br /> 3/30/1998 NP 802 3796 -- 320 1 7 <0 5 <0 6 2 4 <5 0/<2 0* 0 80 <br /> 6/25/1998 NP 969 3629 167 876 300 190 8 71 176 <5 0 140 <br /> 9/11/1998 Well paved over <br /> 12115/1998 NP 46 11 886 37 25 -- 456 102 0 690 6 12 809 <5 0 070 <br /> 3/17/1999 NP 8 55 37 56 0 31 130 212 0 528 2 12 271 <5 0 2 50 <br /> 5/14/1999 NP 8 81 3730 026 155 1 79 <0 5 241 200 <5 0 420 <br /> 9/16/1999 NP 917 36 94 0 36 747 27 8 1 42 988 840 <5 0 1 80 <br /> 12/22/1999 NP 799 3812 -1 18 648 <0 5 0 586 5 85 636 <2 50 0 31 <br /> 2/29/2000 NP 818 3793 -019 142 1 60 <0 5 2 39 136 <2 50 6 20 <br /> 6/7/2000 NP 902 3709 -084 - 576 4 82 <0 500 843 <2 50 <125 - <br /> 9/25/2000 NP 987 36 24 0 85 -- 2,720 563 114 331 473 <50 0 -- <br /> 12/29/2000 P 838 3773 1 49 2,350 <5 00 <5 00 191 <5 00 <2 00* 5 1 <br /> 3/27/2001 P 966 3645 -128 - <50 0 <0 500 <0 500 <0 500 <0 500 <2 00* 2 7 <br /> 6/20/2001 P 899 3712 067 - 150 <1 0 <1 0 15 2 9 <2 0* <br /> 9/12/2001 P 911 3700 -012 810 1 3 3 7 4 4 8 4 <2 5 17 <br /> 12119/2001 P 878 3733 0 33 380' 0 81 <0 50 2 5 15 21* 048 <br /> 3/14/2002 P 880 3731 -002 170 <0 50 <0 50 071 <0 50 <0 50* 072 <br /> 6/28/2002 P 910 3701 -030 260 079 0 56 2 7 <0 5 0 82* 1 0 <br /> 9/11/2002 P 914 3697 -004 150 3 0 0 7 42 1 4 0 73* 2 3 <br /> 12/17/2002 P 833 3778 0 81 -- 420 <2 0 <2 0 6 4 7 6 17* 1 4 <br /> 3!31/2003* P 875 3736 -042 — 268 <0 5 <0 5 056 <0 5 11 0 8 <br /> K1WprocessV5 BP ARCO}D2o931Quarterly\l QTR 03120930WMRIQ03 <br />