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Tab* Noe 18 <br /> Groundwater Elevation and Analytical Data <br /> ARCO Seance Station#2093 <br /> 3425 Tracy Blvd,Tracy,California <br /> Floating <br /> Well Depth product Groundwater Groundwater Total <br /> Date Elevation to Water thickness Elevabon Elevation Change TPHg Benzene Toluene Ethylbenzene Xylenes MTBE 00 <br /> Sampled (feet,MSL) (feet,TQC) In feet (feet,MSL) (feet) (ppb) (ppb) (ppb) (ppb) (ppb) (ppb) (mg/l) <br /> 10/26195 928 003 3672 051 <br /> 02/12/96 787 002 3812 140 <br /> ATR-8 04/18/96 846 002 3754 -058 -- -- -- - -- <br /> (cont) 07/18/96 895 -- 3703 -051 88 000 72 220 620 2 500 <500 <br /> 11/15/96 940 -- 3658 -046 52,000 110 130 240 1,300 <200 <br /> 03/14/97 924 -- 3674 016 350 42 <0 5 16 26 <2 5 010 <br /> 06/04/97 NP 869 -- 3729 055 1,200 42 52 82 150 <2 5 003 <br /> 08/11/97 NP 910 -- 3688 041 7,800 280 75 140 710 <25 - <br /> 11/17/97 NP -- - -- -- 4,200 57 <0 5 <0 5 250 <2 5 -- <br /> 03/30/98 NP 802 -- 3796 — 320 17 <0 5 <0 5 24 <5 0/<2 0* 080 <br /> 06/25/98 NP 969 -- 3629 -167 876 300 190 871 176 <5 0 140 <br /> 09/11/98 Well Paved Over -- -- -- -- - <br /> 12/15/98 NP 4611 886 -- 3725 -- 456 102 0 690 6 12 809 <5 0 070 <br /> 03/17/99 NP 866 -- 3756 -031 130 212 0 528 212 271 <5 0 250 <br /> 05/14/99 NP 881 -- 3730 026 155 179 <0 5 241 200 <5 0 420 <br /> 09/16/99 NP 917 -- 3694 036 747 278 142 988 840 <5 0 1 80 <br /> 12/22/99 NP 799 - 3812 -1 18 648 <0 5 0 586 585 536 <2 50 031 <br /> 02/29/00 NP 818 -- 3793 -019 142 160 <0 5 239 136 <2 50 620 <br /> 06/07/00 NP 902 - 3709 -084 576 482 <0 500 843 <2 50 <12 5 <br /> 09/25/00 NP 987 — 3624 -085 2,720 563 114 331 473 <50 0 -- <br /> ATR 9 10/16/90 4868 -- -- -- - <50 <0 5 <0 5 <0 5 <0 5 - <br /> 10/19/90 11 11 - 3767 -- - -- -- -- -- <br /> 01/14/91 1104 -- 3764 007 <50 <0 5 <0 5 <0 5 <05 <br /> 04/10/91 1082 3786 022 <50 <0 5 <0 5 <0 5 <0 5 <br /> 07/10/91 1106 -- 3762 -024 <50 <0 5 <0 5 <0 5 <0 5 <br /> 09/24/91 1129 -- 3739 -023 -- - - <br /> 09/25/91 -- -- -- <50 <0 5 <0 5 <0 5 <0 5 <br /> 01/23/92 1096 -- 3772 -- <50 <0 5 <0 5 <0 5 <0 5 <br /> 04/20/92 1088 -- 3780 008 -- -- -- <br /> 04/21/92 -- -- -- <50 <0 5 <0 5 <0 5 <0 5 <br /> 07/08/92 1106 -- 3762 -- <50 <0 5 <0 5 <0 5 <0 5 <br /> 10/07/92 11 16 - 3752 -010 <50 <0 5 <0 5 <0 5 <0 5 <br /> 01/18/93 1034 -- 3834 082 <50 <0 5 <0 5 <0 5 <0 5 <br /> 04114193 1070 -- 3798 -036 <50 <0 5 <0 5 <0 5 <0 5 <br /> 08130/93 11 17 - 3751 -047 <50 <0 5 <0 5 <0 5 <0 5 <br />