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Tas Pof 17 <br /> Groundwater Elevation and Analytical Data <br /> lw. <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) (mgA) <br /> ATR-4 04123/87 4903 1085 — 3818 -- 21,000 3,000 200 <10 950 <br /> 12122/87 11 00 — 3803 -015 -- 5 300 310 430 270 <br /> 03/24/88 1098 — 3805 002 6 000 5,800 320 930 740 - <br /> 06123l88 1211 — 36 92 -1 13 5,200 237 8 8 2 10 <br /> 09/29/88 1072 — 38 31 1 39 1,400 1,430 115 350 130 <br /> 02722189 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 /> 09118l89 11 19 — 37 84 -019 630 280 13 49 100 <br /> 12/28/89 11 08 — 37 95 Oil 1 300 500 25 56 160 - <br /> 04/18/90 1125 — 3778 -017 440 150 51 35 63 <br /> 10116190 11 38 — 3765 -013 380 26 41 4 8 038 — <br /> 01110/91 11 16 — 37 87 022 330 150 31 30 35 <br /> 04/10/91 1099 — 38 04 017 500 8 4 <05 <0 5 24 <br /> 07110/91 11 32 — 3771 -033 190 39 <05 3 7 3 <br /> 09/24191 1157 — 3746 -025 70 22 <05 42 1 5 <br /> 01/23/92 11 16 — 3787 0 41 1,200 300 5 2 49 72 - — <br /> 04120/92 11 12 — 3791 004 -- -- -- -- — <br /> 04/21192 — — — -- 560 150 <5 36 29 <br /> 07/08/92 1131 — 3772 -- 590 150 21 36 39 <br /> 10/07/92 1145 -- 3758 -014 -- -- -- — -- -- <br /> 10/08/92 -- — — -- 1,200 240 4 8 62 97 — <br /> 01/18193 1045 — 3858 - — -- -- — -- <br /> 01/19l93 -- — — - 1,200 240 5 5 44 90 <br /> 04114193 1087 — 3816 - -- -- -- -- — <br /> 04/15/93 — — -- - 810 160 4 2 47 63 <br /> 08/31193 (c) 1098 — -- - 100 33 <0 5 6 13 — <br /> 10/27/93 1098 — — - 200 12 1 2 7 9 16 <br /> 02118/94 1031 — — — 950 140 5 73 30 <br /> 05!20194 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 2 3 350 200 — <br /> 02/28/95 1068 — — - 4,600 180 <5 750 100 <br /> 04/26/95 1094 — - 1,100 19 <1 110 8 3 — <br /> 07127/95 11 11 — 1,700 12 <25 170 8 4 — <br /> 10126/95 1118 — — -- -- -- -- -- — — <br /> 10127195 — — — - 600 7 <1 30 2 - - <br /> 02/12/96 1043 -- - - 6,300 <05 <05 340 150 — — <br />