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Table 1 <br /> Groundwater Elevation and Analytical Data <br /> ARCO Service Station No 2093 <br /> 3425 Tracy Boulevard Tracy Calitomia <br /> Well Depth Groundwater Groundwater Product Ethyl- Xylenes <br /> Welt Date Elevation to Water Elevation Elevation Thickness TPH9 Benzene Toluene benzene (total) M1BE DO <br /> Humber Sampled (ft,MSL) (ft,TOC) (ft,MSL) Change(ft) (ft) (p9/L) kI ) (Ng/L) (pg/L) (M91L) Wg/L mg/L) <br /> ATR 1 4/23/1987 5058 1249 3809 — <100 <0 5 <0 5 <0 5 23 — <br /> 12/22/1987 1263 3795 -014 — — 5 9 <0 5 09 <0 5 — — <br /> 3/24/1968 1254 3804 009 — <0 5 <0 5 <0 5 <0 5 — <br /> 6123/1988 1283 3775 -0 29 <0 5 1 3 4 3 22 — — <br /> 9/29/1988 1301 3757 -018 -- <0 5 <0 5 <0 5 <0 5 — — <br /> 2/22/1989 1246 3812 055 <100 1 4 <0 5 <0 5 18 — — <br /> 6/21/1989 1237 3821 009 520 360 G8 21 36 — — <br /> 9/18/1989 128B 3770 0 51 27 000 250 1 200 570 7 100 <br /> 12/17/1989 1268 3790 020 <50 3 4 <0 3 1 3 14 — <br /> 4/18/1990 1284 3774 016 — 13 21 1 5 16 16 — — <br /> 10/16/1990 - -- — <50 1 0 <0 5 2 0 20 — <br /> 10/19/1990 1310 3748 -- - -- — — — <br /> 1/10/1991 1278 3780 032 — <50 2 4 <0 5 5 7 23 — <br /> 4/10/1991 1252 3806 026 73 1 3 <0 5 48 <0 5 — — <br /> 7/10/1991 1295 3763 -043 90 2 <0 5 4 7 17 — <br /> 9/24/1991 1330 3728 -035 <50 <0 5 <0 5 <0 5 <0 5 — — <br /> 1/23/1992 1277 3781 O 53 — <50 <0 5 <0 5 <0 5 <0 5 — — <br /> 4/20/1992 12 58 38 00 019 <50 <0 5 <0 5 <0 5 <0 5 — — <br /> 7/8/1992 1290 3768 -032 — <50 <0 5 <0 5 0 B <0 5 -- -- <br /> 10/7/1992 1309 3749 -019 — <50 <0 5 <0 5 <0 5 <0 5 — — <br /> 1/18/93 - <br /> 4/14/1993 1231 38 27 — <50 <0 5 <0 5 1 5 <0 5 — — <br /> 8/30/1993 1318 3740 -087 <50 <0 5 <0 5 <0 5 <0 5 — — <br /> 10/27/1993 1313 37 45 005 <50 <0 5 <0 5 <0 5 <0 5 — — <br /> 2/18/1994 1265 3793 048 — 17 O 6 1 0 1 0 08 — — <br /> 5120/1994 1271 3787 -006 27 0 6 0 3 1 4 <0 5 — — <br /> 10/7/1994 1314 3744 -043 — <50 <0 5 <0 5 <0 5 <0 5 — — <br /> 12/16/1994 1274 3784 040 — <50 <0 5 <0 5 <0 5 <0 5 — <br /> 228/1995 1265 3793 009 — <50 <0 5 <0 5 1 0 <0 5 — — <br /> 4,126/199,5 12 90 3768 -025 _ <50 <0 5 <0 5 <0 5 <0 5 = _ <br /> 7/27/1995 1322 37 36 -032 <br /> 10/26/1995 1340 3718 -018 <br /> 10/27/1995 — - — <50 <0 5 <0 5 <0 5 <0 5 » <br /> 2/12/1996 1230 3828 — — 120 <0 5 <0 5 22 <0 5 — — <br /> 4/18/1996 1290 3768 -060 - - — — — — <br /> 7/18/1996 13 28 3730 -038 — <50 <0 5 <0 5 <0 5 <0 5 <5 0 <br /> 11/15/1996 1374 3684 -0 46 — — — — <br /> 3/14/1997 NP 1368 3690 0 06 <50 <0 5 <0 5 <0 5 <0 5 — 030 <br /> 6/4/1997 1304 3754 0 64 — - — — — — 022 <br /> 8/11/1997 NP 1343 3715 -039 <50 <0 5 <0 5 <0 5 <0 5 23 - <br /> 11/17/1 997 1329 3729 014 — — -- -- — — <br /> 3/30/1998 NP 1258 38 00 0 71 <50 <0 5 <0 5 <0 5 <0 5 <50 2 00 <br /> 6/25/1998 1356 3702 098 — — — — — — — <br /> 9/11/1998 NP 1320 3738 0 36 — <50 <O 5 <0 5 <0 5 <0 5 <25 104 <br /> 12/15/1998 1302 37 56 018 — - — — — — 1 30 <br /> 3/17/1999 NP 1279 37 79 023 — <50 <0 5 <0 5 <0 5 <0 5 <5 0 510 <br /> 5/14/1999 1306 3752 027 — — — — -- 220 <br /> 9/16/1999 NP 1336 3722 -030 — <50 <0 5 <0 5 <0 5 <0 5 <50 330 <br /> 12/22/1999 1319 3739 017 — - — -- — 1 77 <br /> 2/29/2000 NP 1245 3813 074 — <50 <0 5 <0 5 <0 5 <0 5 <2 5 490 <br /> 6/7/2000 NP 1318 3740 073 — — — - — — <br /> 9/25/2000 NP 1339 3719 0 21 — <50 <0 5 <0 5 <0 5 2,55 <2 5 0 30 <br /> 12/29/2000 1299 3759 040 - — - -- - 5 3 <br /> 3/27/2001 Well maccessVe <br /> 60202001 1301 3757 002 — — — <br /> 9/12/'2001 Well inaccessible <br /> 12/19/2001 Well inaccessible <br /> 3/1402002 Well inaccessible <br /> 6282002 Well inaccessible <br /> 9/11!2002 Well inaccessible <br /> 12/17/2002 - — -- — - — - <br /> 3/31/2003 P 1292 37 66 - <50 <0 5 <O 5 <0 5 <0 5 0 61 1 3 <br /> 6/92003 1252 3806 040 Not Sampled <br /> . 9/18/2003 P 1315 3743 0 63 <50 <05 <0 5 <0 5 <0 5 0 56' 0 9 <br /> 12/24/2003 129a 3760 -017 Not Sampled <br /> 9 Mixw MS 0P PAC0102003%0ua 1.t A4 0TR 0312093 GWMR 4003 Page t of 14 <br />