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TO Pof 16 <br /> Groundwater Elevation and Analytical Data <br /> ARCO Service Station#2093 <br /> i <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) (mgll) <br /> ATR-2 10/27/93 1195 - 3727 0 01 <50 <0 5 <0 5 <05 <0 5 - - <br /> (cont) 02/18194 11 54 -- 3768 041 <10 0 7 0 9 <03 07 - -- <br /> 05/20/94 11 61 -- 3761 -007 <10 0 9 <0 3 <03 <0 5 -- - <br /> 10l07l94 11 93 -- 37 29 -032 <50 <0 5 <0 5 <05 <0 5 - - <br /> 12/16/94 11 56 -- 3766 037 <50 <0 5 <0 5 <0 5 <0 5 - - <br /> 02/28/95 11 60 -- 3762 -004 <50 <05 <0 5 <0 S <0 5 - -- <br /> 04/25/95 11 95 -- 3727 -035 <50 <05 <0 5 <0 5 <0 5 - - <br /> 07l27195 1291 -- 3631 -096 <50 <0 5 <0 5 <0 5 <0 5 -- -- <br /> 10/26/95 1226 -- 3696 065 <50 <0 5 <0 5 -05 <0 5 - - <br /> 02112/96 1140 -- 3782 086 <50 <05 <0 5 <0 5 <0 5 - <br /> 04/18/96 1190 -- 3732 -050 <250 <2 5 <2 5 <2 5 <25 -- -- <br /> 07/18/96 1210 -- 3712 -020 <50 <05 <0 5 <0 5 <0 5 500 - <br /> 11/15/96 1270 -- 3652 -060 <50 <0 5 <0 5 <0 5 <05 750 -- <br /> I <br /> 03/14/97 P 1270 -- 36 52 000 <50 <0 5 <0 5 <0 5 <05 280 008 <br /> 06/04197 NP 1202 - 3720 068 <50 064 <0 5 <0 5 <05 480 006 <br /> 08/11/97 P 1233 -- 36 89 -0 31 <50 <0 5 <0 5 <0 5 <05 440 <br /> 11/17/97 P 1226 - 3696 007 <50 <0 5 <05 <0 5 <05 98 <br /> 03/30/98 NP 1182 -- 37 40 044 <50 <0 5 <05 <0 5 <05 18120' 1 2 <br /> 06/25/98 NP 1205 - 3717 -023 <50 <0 5 <05 <0 5 <05 109 16 <br /> 09/11/98 NP 1212 -- 3710 -007 <50 -CO 5 <05 <0 5 <0 5 250 167 <br /> 12/15/98 NP 1201 - 3721 011 <50 <05 <0 5 <0 5 <0 5 <5 0 1 5 <br /> 03/17/99 NP 11 65 -- 3757 036 <50 <0 5 <0 5 <05 <0 5 <50 2 3 <br /> 05/14/99 NP 1205 -- 3717 -040 <50 <0 5 <0 5 <05 <05 <50 1 90 <br /> 09/16199 NP 1223 -- 3899 -018 <60 <0 6 <0 6 <0 5 <0 6 <3 0 3 7 <br /> ATR-3 04/23/87 4993 11 79 -- 3814 -- 17,000 2,300 180 <50 2,300 -- -- <br /> 12/22/87 11 93 -- 3800 -014 -- 5,000 50 530 250 - <br /> 03/24/88 1258 -- 3735 -065 43,000 8,300 8,700 4,400 7,800 -- -- <br /> 06/23/88 11 17 - 3876 141 70,000 6,160 4,221 1,800 4,750 - - <br /> 09/29/88 1223 3770 -106 57,400 8,850 17,600 2,190 8,170 <br /> 02/22/89 11 82 -- 3811 041 110,000 1,000 2,100 480 2,000 - - <br /> 06/29189 -- - -- -- 4,500 890 520 250 1,100 -- - <br /> 09/18/89 1219 - 3774 -- 7,400 1,000 1,300 460 2,200 -- -- <br /> 12/28/89 1201 -- 3792 018 27,000 840 1,400 840 5,600 - -- <br /> 04118190 1215 -- 37 78 -014 4,600 1,000 490 340 1,500 -- -- <br /> 10/16/90 1235 -- 3758 -020 14,000 1,900 1,300 780 4 600 - - <br />