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T " �1of16 y <br /> Groundwater Elava nd Analytical Data <br /> ARCO Service Station#2093 � <br /> 3425 Tracy Blvd,Tracy,CA <br /> Well Depth Product Groundwater Groundwater Xylenes <br /> Well Date Elevation to Water Thickness elevation Elevation TPI-Ig Benzene Toluene Ethylbenzene (total) MtBE DO <br /> Number Sampled (ft, MSL) (ft,TOC) (ft) A MSL) Change(ft) (ppb) (ppb) (ppb) (ppb) (ppb) (ppb) (mg/L) <br /> ATR-t 4123/87 6058 1249 3809 -- <100 <0 5 <0 5 <0 5 23 -- <br /> 12/22/87 1263 3795 -014 -- 59 <0 5 09 <0 6 - <br /> 3/24/88 1264 -- 3804 009 -- <0 5 <0 5 <0 5 <0 5 -- <br /> 6/23/88 1283 3775 -029-029 <05 13 43 22 <br /> 9129188 1301 3757 -018 -- <0 5 <0 5 <0 5 <0 5 -- <br /> 2/22/89 1246 3812 065 <100 14 <0 5 <0 5 18 -- <br /> 6/21/89 1237 3821 009 520 360 08 21 36 -- <br /> 9/18189 1288 3770 -051 27,000 250 1,200 570 7,100 <br /> 12/27/89 1268 3790 020 <50 34 <0 3 13 14 <br /> 4/18190 1284 -- 3774 -016 13 21 15 16 16 -- .- <br /> 10/16/90 -- -- -- <50 1 <0 5 2 2 - <br /> 10/19/90 1310 3748 -- ._ -. <br /> 1/10/91 1278 3780 032- <50 24 <0 5 57 23 -- <br /> 4/10191 1252 3806 026 73 13 <0 5 48 <0 5 -- <br /> 7/10/91 1295 3763 -043 90 2 <0 5 47 17 <br /> 9/24/91 1330 - 3728 -035 <50 <0 5 <0 5 <0 5 <0 5 <br /> 1/23192 1277 3781 063 <50 <0 5 <0 5 <0 5 <0 6 <br /> 4/20192 1268 -- 3800 0 t 9 <50 <0 5 <0 5 <0 5 <0 5 .- <br /> 7/8192 1290 - 3768 -032 <50 <0 5 <0 6 06 <0 5 -- <br /> 14/7/92 1309 3749 -019 <50 <0 5 <0 5 <0 5 <0 5 - <br /> 1/18/93 -_ -- <br /> 4/14/93 1231 -- 3827 -- <50 <0 5 <0 5 1 6 <0 5 -- <br /> 8/30/93 1318 - 3740 -087 <50 <0 5 <0 5 <0 5 <0 5 <br /> 10/27/93 1313 - 3745 005 <50 <0 5 <0 5 <0 5 <0 6 -. <br /> 2118194 1265 -- 3793 048 17 06 1 1 08 -- <br /> 5/20/94 1271 3787 -006 27 06 03 14 <0 5 -- <br /> 1017194 1314 -- 3744 -043 <50 <0 5 <0 5 <0 5 <0 5 -- <br /> 12/16/94 1274 3784 040 <50 <0 5 <0 5 <0 5 <0 5 -- <br /> 2/28/95 1265 3793 009 <60 <0 5 <0 5 1 <0 5 <br /> 4/26/95 1290 -- 3768 -025 <60 <0 5 <0 5 <0 5 <0 5 -- <br /> 7127/95 1322 3736 -032 -- -- -- <br /> 10/26/95 1340 3718 -018 -- -- -_ -- <br /> 10/27/95 -- -- -- <50 <0 5 <0 5 <0 5 <0 5 -- <br /> 2/12196 1230 3828 -- 120 <0 5 <0 5 22 <0 5 --4/18/96 1290 -- 3768 -060 -- -- -- -. <br /> 7118196 1328 - 37 30 -038 <50 <0 5 <0 5 <0 5 <0 5 <5 _ <br /> 11/15/96 1374 -- 3684 -046 -- -- _ -_ .. ._ <br /> 3114197 NP 1368 -- 3690 006 <60 <0 5 <0 5 <0 5 <0 5 030 <br /> 6/4/97 1304 -- 3754 064 -- -- -- -- - -- 022 <br /> 8/11/97 NP 1343 3715 -039 <50 <0 6 <0 6 <0 5 <0 5 23 -- <br /> 11/17/97 1329 -- 3729 014 -- -- — .. .. _ <br /> 3/30/98 NP 1258 - 3800 071 <50 <0 5 <0 5 <0 5 <0 5 <5 0 200 <br />