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Tae Pa*f 16 <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 TPN-G Benzene Toluene Ethylbenzene Xylenes MTBE 00 <br /> Sampled (feet,MSL) (feet,TOC) in feet (feet,MSL) (feet) (ppb) (ppb) (ppb) (ppb) (ppb) (ppb) (mgll) <br /> ATR-8 11/15/96 9 40 -- 36 58 -045 52,000 110 130 240 1,300 <200 — <br /> (cont) 03/14/97 924 -- 3674 016 350 42 <0 5 1 6 26 <2 5 010 <br /> 06/04/97 NP 869 -- 3729 055 1,200 42 52 8 2 150 <2 5 003 <br /> 08111/97 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 <2 5 — <br /> 03/30/98 NP 802 — 3796 — 320 17 <0 5 <0 5 2 4 <5 01<2 0' 080 <br /> 06/25/98 NP 969 -- 36 29 -167 876 300 1 90 871 176 <5 0 140 <br /> 09/11/98 Well Paved Over -- -- -- <br /> 12/15/98 NP 4611 886 -- 3725 — 456 102 0 690 612 809 <5 0 070 <br /> 03/17/99 NP 855 -- 37 56 -0 31 130 212 0 528 212 271 <50 250 <br /> 05/14/99 NP 8 81 3730 026 155 179 <05 241 200 <50 4 20 <br /> 09/16/99 NP 917 .. 3894 0 36 747 278 142 sea 840 <8 0 180 <br /> ATR-9 10/16/90 4868 -- -- — — <50 <0 5 <0 5 <0 5 <0 5 — .- <br /> 10/19/90 11 11 -- 3757 — -- _ -- — .. _ <br /> 01/10/91 1104 — 37 64 007 <50 <0 5 <0 5 <0 5 <0 5 - <br /> 04/10/91 1082 -- 3786 022 <50 <0 5 <05 <05 <0 5 — -- <br /> 07/10/97 1106 -- 3762 -024 <50 <0 5 <05 <05 <0 5 — -- <br /> 09/24/91 1129 — 3739 -0 23 -- .. -- _ — <br /> 09/25/91 -- -- — — <50 <05 <0 5 <0 5 <0 5 -- - <br /> 01l23/92 1096 -- 3772 — <50 <05 <0 5 <0 5 <0 5 — -- <br /> 04/20/92 1088 -- 3780 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 /> 10/07/92 11 16 3752 -010 <50 <0 5 <0 5 <0 5 <05 -- <br /> 01/18/93 1034 -- 38 34 0 62 <50 <0 5 <0 5 <0 5 <05 — <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 -- 37 45 -0 06 <50 <05 <0 5 <0 5 0 7 — -- <br /> 02/17/94 1089 — 3779 0 34 — — -- — -- — — <br /> 02/18/94 -- -- — — <10 <03 0 4 <0 3 <0 5 -- — <br /> 05/20/94 1097 -- 37 71 — <10 <0 3 <0 3 <0 3 <0 5 — -- <br /> 10/07/94 11 19 -- 3749 -022 <50 <0 5 <05 <05 <0 5 -- — <br /> 12)16/94 1091 -- 37 77 028 <50 <0 5 <0 5 <0 5 <0 5 — - <br /> 02128195 1093 — 3775 -002 <50 <0 5 <0 5 <0 5 <0 5 -- - <br /> 04/25/95 11 46 3722 -0 53 <50 <0 5 <0 5 <0 5 <0 5 <br />