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Tale Pef 16 <br /> Groundwater Elevation and Analytical Data <br /> ARCO Service Station#2093 <br /> 3425 Tracy Blvd,Tracy,California <br /> i <br /> Floating <br /> Well Depth product Groundwater Groundwater Total <br /> Date Elevatron 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) (mgfl) <br /> ATR-4 04/23/87 4903 1085 -- 3818 — 21,000 3,000 200 <10 950 — -- <br /> 12/22087 1100 - 38 03 -015 -- 5,300 310 430 270 - <br /> 03/24188 1098 -- 38 05 002 6,000 5,800 320 930 740 -- - <br /> 06/23188 1211 — 3692 -1 13 5,200 237 8 8 2 10 — — <br /> 09/29188 1072 — 38 31 139 1,400 1,430 115 350 130 -- <br /> 02/22/89 1091 -- 3812 -019 22,000 1,300 82 54 170 -- — <br /> 06/29/89 11 00 3803 -009 1,300 590 38 97 220 — <br /> 09118189 11 19 — 3784 -019 630 280 13 49 100 - - <br /> 12/28/89 11 08 — 3795 011 1,300 500 25 56 160 — — <br /> 04118/90 11 25 -- 3778 -017 440 150 51 35 63 — - <br /> 10/16/90 11 38 -- 3765 -013 380 26 41 4 8 038 - <br /> 01/10/91 11 16 3787 022 330 150 31 30 35 <br /> 04/10/91 1099 3804 017 500 8 4 <0 5 <05 24 - <br /> 07/10/91 11 32 3771 -033 190 39 <0 5 3 7 3 — - <br /> 09/24191 11 57 3746 -025 70 22 <05 4 2 15 — - <br /> 01/23/92 11 16 -- 3787 0 41 1.200 300 5 2 49 72 <br /> 04120t92 11 12 — 3791 004 — — .. -_ _ — <br /> 04/21192 -- — — -- 560 150 <5 36 29 — <br /> 07/08/92 11 31 3772 — 590 150 21 36 39 -- — <br /> 10/07/92 11 45 - 3758 -014 -- — ._ -- _ _ <br /> 10108192 -- — — -- 1,200 240 4 6 62 97 -- <br /> 01/18/93 10 45 - 3858 -- -- — — _ _ _ <br /> 01/19/93 -- -- -- — 1,200 240 5 5 44 90 - <br /> 04/14/93 1087 -- 3816 — _ -- __ — -- <br /> 04/15/93 -- -- -- 810 160 4 2 47 63 — — <br /> 08/31/93 (c} 1098 -- -- -- 100 33 <0 5 6 13 -- -- <br /> 10/27/93 1098 -- -- -- 200 12 12 7 9 16 -- — <br /> 02/18/94 1031 — — 950 140 5 73 30 -- — <br /> 05/20/94 1071 -- -- -- 8,100 590 5 9 190 220 -- -- <br /> 10/07/94 1100 — — -- 1,100 30 1 16 73 — <br /> 12/16/94 1061 — -- — 1,600 310 23 350 200 - <br /> 02/28/95 1068 -- -- — 4,600 180 <5 750 100 - — <br /> 04/26/95 1094 -- -- -- 1,100 19 <1 110 83 -- — <br /> 07/27/95 11 11 — -- — 1,700 12 <2 5 170 8 4 — <br /> 1026195 1118 <br /> 10/27/95 -- - -- 600 7 <1 30 2 — — <br />