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J <br /> i • i <br /> Table 1 J <br /> Groundwater Elevation and Analytical Data <br /> ARCO Service Station No 2093 <br /> 3425 Tracy Blvd, Tracy, CA <br /> TOC Depth to Water Level Ethyl- Total <br /> Well Date PI Elevation Water Elevation TPHg TPHd Benzene Toluene benzene Xylenes MtBE DO <br /> Number Sampled NP (feet msl) (feet bgs) (feet msl) (pg1L) (pglL) (,uglL) (Ivg/L) (pg/L) (pg1L) (Ng/L) (mg/L) Comments <br /> ATR-4 10/26/1995 — -- 1118 — -- — — __ __ <br /> 10/27/1995 - -- — — 600 -- 7 <1 30 2 -- — <br /> 2/92/1996 — 1043 — 6,300 — <0 5 <0 5 340 150 — -_ <br /> 4/18/1996 -- -- 1077 -- 770 — <1 0 <1 0 41 19 — — <br /> 7/18/1996 - 1052 — 2,600 — 12 <5 52 <5 560 — <br /> 11/15/1996 - — 1151 — 440 -- <0 5 <0 5 08 22 140 -- <br /> 3/1411997 - — 1157 — 150 — 15 <0 5 <0 5 <0 5 870 007 <br /> 6/4/1997 NP - 1093 — 420 — 87 14 12 1 3 54 <br /> 008 <br /> 811 111 99 7 NP -- 1055 -- 320 — 24 1 1 <0 5 57 63 -- <br /> 91/17/1997 NP -- 1120 — 420 -- 33 14 <0 5 076 48 — <br /> 3/30/1998 NP — 1038 — <50 — <05 <0 5 <0 5 <05 <5 0 1 1 <br /> 6/25/1998 NP — 1040 -- 658 - <0 5 <0 5 <0 5 <0 5 <50 1 <br /> 9/11/1998 NP — 1106 — <50 — <0 5 <0 5 <05 <0 5 <2 5 084 <br /> 12/15/1998 NP - 1075 -- <50 <0 5 <0 5 <05 <0 5 <50 1 1 <br /> 3/17/1999 NP — 1053 — <50 — <0 5 <0 5 <05 <0 5 <5 0 67 <br /> 5/14/1999 NP -- 1097 -- <50 0 591 <0 5 <05 <0 5 8 720 2 <br /> 9/16/1999 NP 1093 -- <50 -- <0 5 <0 5 <0 5 <0 5 <50 68 <br /> 12/22/1999 NP 1089 — <50 -- <0 5 <0 5 <0 5 <0 5 857 158 <br /> 2/29/2000 NP — 1026 -- <50 — <0 5 <0 5 <05 <0 5 <25 3 1 <br /> 6712000 NP - 1106 -- <50 -- <0 5 <0 5 <0 5 <0 5 842 -- <br /> 9/25l2000 NP -- 1124 <50 — <0 5 <0 5 <0 5 <0 5 2807 <br /> 12/29/2000 P -- 1081 -- <50 0 -- <0 500 <0 500 <0 500 <0 500 636' f45 <br /> 3/27/2001 P -- 1064 - <50 0 -- <0 500 <0 500 <0 500 <0 500 <2 00'6/20/2001 P -- 1084 — <50 <0 50 <0 50 <0 50 <0 50 <2 0' <br /> 9/12/2001 P — 1094 - <50 -- <0 50 <0 50 <0 50 <0 50 <2 5 24 <br /> 12/19/2001 P 1078 - <50 <0 50 <0 50 <0 50 <0 50 <2 0' 1 59 <br /> 3/14/2002 P 1078 -- <50 <0 50 <0 50 <0 50 <0 50 710' 1 29 <br /> 6/28/2002 P — 1078 — <50 <0 5 <0 5 <0 5 <0 5 <0 5' 35 <br /> 9/11/2002 P — 1092 - <50 <0 5 <0 5 <0 5 <0 5 <0 5` 33 <br /> 12/17/2002 - — - _ __ __ _ _ Well inaccessible <br /> 03/31/2003 P -- 1072 <50 -- <0 50 <0 50 <0 50 <0 50 <0 50' 39 <br /> 06/09/2003 P - 10 77 -- <50 <0 50 <0 50 <0 50 066 <0 50' 52 <br /> 09118!2003 P - <br /> 1097 <50 -- <0 50 -<050 <0 50 <0 50 <0 50' 3 8 <br /> I <br /> Report Date May 6,2004 Page 8 of 25 <br />