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Table 1 <br /> Groundwater Elevation and Analytical Data <br /> ARCO Service Station No 2093 <br /> 3425 Tracy Blvd, Tracy, CA <br /> TOC Depth to Water Levet Ethyl- Total <br /> Well Date P! Elevation Water Elevation TPHg TPHd Benzene Toluene benzene Xylenes MtBE DO <br /> Number Sampled NP (feetms]) (feet bgs) (feet msl) W91L) (frg1L) (pgIL) (pg/L) Wg/L) (NgIL) WIL) (mg/L) Comments <br /> ATR-12 12/22/1999 NP 4708 942 3766 <50 -- <05 <0 5 <05 <0 5 <2 50 083 <br /> 2!2912000 NP 4708 8 93 38 15 <50 - <0 5 <0 5 <0 5 <0 5 <2 50 5 7 <br /> 6/7/2000 - 47 08 - Well maccessEble <br /> 9/25/2000 - 4708 -- - - -- - - - - - Well inaccessible <br /> 12/21/2000 - 47 OS - -- - - - - - - - - Well inaccessible <br /> 3!2712001 P 47 OS 9 26 37 82 —<5 -- <0 500 <0 500 <0 500 <0 500 —<200* 2 3 <br /> 6/20/2001 P 4708 996 3712 <50 - <050 <0 50 <0 50 <0 50 —<20* -- <br /> 9/12l2001 P 47 08 9 38 37 70 <50 - <0 50 <0 50 <0 50 <0 50 <2 5 2 <br /> 1211912001 P 4708 9 28 37 80 <50 - <0 50 <0 50 —<-0-50— <0 50 <2 0' 232 <br /> 3/14/2002 P 47 08 9 29 37 79 <50 - <0 50 <0 50 <0 50 <0 5Q —<050 184 <br /> 6!2812002 P 47 OS 9 43 37 65 <50 - <0 5 <0 5 <0 5 <0 5 <0 5' 4 5 <br /> 9/11/2002 P 47 08 9 38 37 70 <54 - <05 <0 5 <br /> <05 <0 5 <0 5* 33 <br /> 12/17/2002JP ] <br /> 4708 878 3830 <50 - <0 5 <05 <0 5 <D 5 <0 5* 42 <br /> 03/31/2003 4708 930 3778 <50 - <050 <0 50 <0 50 <050 <0 50' 2 1 <br /> 06/09/2003 47 08 928 3780 <50 - <0 50 <0 50 <050 <0 50 <0 50* 2 9 <br /> 09/18/2003 4708 9 50 3758 <50 - <0 50 <050 <0 50 <0 50 <0 50* 2 5 <br /> 12/24/2003 P 4708 9 30 37 78 <50 - <0 50 <0 50 —<050 <0 50 <0 50* 2 0 <br /> 03/12/2004 P 1888 918 970 <50 - <0 50 <0 50 <0 50 <0 50 <0 50* 17 <br /> 06101/2 04 - 18 88 939 949 <br /> 09/20/2004 - 18 88 949 9 39 <br /> 12/1312004 - 18 88 <br /> <0 50 <0 50 <br /> SMW-1 10l7I1994 - 5024 1286 3738 2,200 -- 250 110 <0 5 360 - - <br /> 12/16/1994 - 5024 12 54 3770 5,200 - 740 210 330 600 - <br /> 2/28/1995 - --5024 12 40 3784 8,300 - 1,000 330 450 790 <br /> 4/26/1995 -- 5024 1271 3753 5,100 - 470 110 270 480 - <br /> 7/27/1995 - 50 24 13 00 37 24 7,400 -- 410 42 360 630 - <br /> 10/26/1995 - 5024 1303 - -- -- - - - _ - - (a) <br /> 10/27/1995 - 5024 -- - 7,600 -- 640 33 440 410 -- <br /> 2/12/1996 -- 50 24 1200 -- 3,800 - 394 <D 5 220 98 - <br /> 4/18/1996 -- 5024 1258 -- 500 - 60 <0 5 20 7 4 -- _ <br /> 7/18/1996 - 5024 1285 - 3400 — - 200 <5 130 55 60 -- <br /> Report Date February 22,2005 <br /> Page 24 of 27 <br />