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TO Pag2 of 18 <br /> Groundwater Elevation and Analytical Data <br /> ARCO Service Station#2093 <br /> 3425 Tracy Blvd Tracy,California <br /> Floating <br /> Well Depth product Groundwater Groundwater Total <br /> Date Elevation to Water thickness Elevation Elevation Change TPHg Benzene Toluene Ethylbenzene Xylenes MTBE DO <br /> Samplod (feet,MSL) (feet TOC) in feet (feet,MSL) (feet) (ppb) b b b b) (mg/1) <br /> 07/18/96 895 3703 051 88,000 72 220 620 2,500 <500 - <br /> ATR 8 11/15Y96 940 3658 045 52,000 110 130 240 1,300 <200 <br /> {cant) 03/14/97 924 3674 016 350 42 <0 5 16 26 <2 5 0 10 <br /> 06/04/97 NP 869 3729 055 1,200 42 52 82 150 <2 5 003 <br /> 08/11/97 NP 9 10 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 01<2 0' 080 <br /> 06/25/98 NP 969 3629 1 67 876 300 1 90 871 176 <5 0 1 40 <br /> 09/11/98 Well Paved Over -- -- -- -- -- -- - <br /> 12/15/98 NP 46 11 886 3725 -- 456 102 0 690 6 12 809 <50 070 <br /> 03/17/99 NP 855 3756 031 130 2 12 0 528 2 12 271 <5 0 250 <br /> 05/14/99 NP 8 81 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 38 12 -1 18 648 <0 5 0 586 585 536 <2 50 031 <br /> 02/29/00 NP 8 18 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 11 4 331 473 <50 0 - <br /> 12/29/00 p 8 38 - 3773 1 49 2,350 <5 00 <5 00 191 <5 00 <2 00" 51 <br /> ATR 9 10/16/90 4868 - <50 <0 5 <0 5 <0 5 <0 5 - - <br /> 10/19/90 11 11 3757 - -- - -- -- - <br /> 0 V 10191 1104 3764 007 <50 <0 5 <0 5 <0 5 <0 5 <br /> 04/10/91 1082 3786 022 <50 <0 5 <0 5 <0 5 <0 5 - <br /> 07/10/91 11 06 3762 024 <50 <0 5 <0 5 <0 5 <0 5 <br /> 09/24/91 11 29 3739 023 -- -- - <br /> 09/25l91 - - - <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 /> 04/14/93 1070 3798 -036 <50 <0 5 <0 5 <0 5 <0 5 -- <br /> 08/30/93 11 17 3751 047 <50 <0 5 <0 5 <0 5 <0 5 <br /> 10/27/93 1123 3745 006 <50 <0 5 <0 5 <0 5 07 <br /> 02/17/94 1089 3779 034 -- -- -- -- <br /> 02/18/94 - -- -- <10 <0 3 04 <0 3 <0 5 <br /> 05/20/94 1097 3771 -- <10 <0 3 <0 3 <0 3 <0 5 -- - <br />