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STae Paof 17 <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 TPH-G Benzene Toluene Ethylbenzene Xylenes MTBE DO <br /> Sampled (feet,MSL) (feet,TOC) In feet (feet,MSL) (feet) (ppb) (ppb) (ppb) (ppb) (ppb) (ppb) (mg/1) <br /> ATR-8 11/15/96 940 — 36 56 -045 52,000 110 130 240 1,300 <200 — <br /> (cont) 03/14/97 924 — 3674 016 350 42 <0 5 1 6 26 <25 010 <br /> 06/04/97 NP 869 — 3729 055 1,200 42 5 2 8 2 150 <25 003 <br /> 08/11197 NP 910 — 3688 -0 41 7,800 280 75 140 710 <25 -- <br /> 11/17/97 NP — -- — -- 4,200 57 <0 5 <0 5 250 <25 <br /> 03/30/98 NP 802 — 3796 — 320 1 7 <0 5 <0 5 24 <5 01<2 0' 080 <br /> 06/25/98 NP 969 — 36 29 -1 67 876 300 1 90 8 71 176 <5 0 1 40 <br /> 09/11/98 Well Paved Over -- — -- __ — -- <br /> 12115/98 NP 4611 886 — 3725 — 456 102 0 690 612 809 <50 070 <br /> 03117/99 NP 855 — 3756 -0 31 130 212 0 528 212 2 71 <50 2 50 <br /> 05/14/99 NP 8 81 — 3730 026 155 1 79 <0 5 2 41 240 <5 0 420 <br /> 09/16199 NP 917 — 3694 036 747 27 8 1 42 988 8 40 <5 0 1 80 <br /> 12/22/99 NP 799 — 3812 -1 18 648 <0 5 0 586 5 85 536 <2 50 0 31 <br /> 02/29/00 NP 818 — 3793 019 142 160 <0 5 239 136 <2 60 620 <br /> ATR-9 10/16/90 4868 -- — — -- <50 <0 5 <05 <0 5 <0 5 -- -- <br /> 10/19/90 11 11 — 3757 -- -- -- -- -- _ <br /> 01!10191 1104 — 37 64 007 <50 <0 5 <0 5 <0 5 <0 5 — — <br /> 04/10/91 1082 — 3786 022 <50 <05 <0 5 <0 5 <0 5 - <br /> 07/10/91 11 06 — 37 62 -024 <50 <05 <05 <0 5 <05 — <br /> 09/24/91 1129 — 3739 -023 -- -- -- -- — <br /> 09125/91 -- — — -- <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 — 37 80 008 -- -- -- -- _ <br /> 04/21/92 — — -- -- <50 <0 5 <0 5 <0 5 <05 — <br /> 07/08/92 1106 — 3762 -- <50 <0 5 <0 5 <0 5 <05 — <br /> 10l07192 11 16 — 3752 -010 <50 <0 5 <0 5 <0 5 <0 5 - <br /> 01118/93 1034 — 3834 0 82 <50 <05 <0 5 <0 5 <05 — <br /> 04/14/93 1070 — 3798 -036 <50 <05 <05 <0 5 <0 5 <br /> 08/30/93 11 17 — 3751 -047 <50 <0 5 <0 5 <0 5 <0 5 - <br /> 10127/93 1123 — 3745 -0 06 <50 <05 <0 5 <0 5 0 7 - — <br /> 02117/94 1089 — 3779 034 — -- -- -- _- <br /> 02/18/94 — — — -- <10 <03 04 <0 3 <05 -- — <br /> 05/20/94 1097 — 3771 — <10 <03 <03 <0 3 <05 - <br /> 10/07/94 11 19 — 3749 -0 22 <50 <05 <05 <05 <05 — <br /> 12116194 1091 — 3777 028 <50 <05 <05 <0 5 <05 -- -- <br /> 02/28/95 1093 — 37715 -002 <50 <G5 <05 <0 5 <0 5 - — <br />