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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 Level Ethyl- Total <br /> Well Date P1 Elevation Water Elevation TPHg TPHd Benzene Toluene benzene Xylenes MtBE DO <br /> Number Sampled NP (feet msl) (feet bgs) (feet msl) (pg/L) (pg/L) (pg/L) (pg1L) (pg/L) (pg/L) (pg1L) (mglL) Comments <br /> ATR-12 6/28/2002 P 47 08 9 43 37 65 <50 <0 5 <0 5 <0 5 <0 5 <0 5` 45 <br /> 9/11/2002 P 4708 938 3770 <50 -- <05 <0 5 <05 <0 5 <0 5* 33 <br /> 1211712002 P 4708 878 3830 <50 w <05 <0 5 <05 <0 5 <0 5* 42 <br /> <50 <0 50 <D 50 <0 5Q <0 50 <0 50* 21 <br /> 03/31/2003 P 47 08 9 30 37 78 — <br /> 06/09/2003 P 4708 928 3780 <50 -- <0 50 <0 50 <0 50 <0 50 <0 50` 29 <br /> 09!1812003 P 4708 950 37 58 <5Q <0 50 <0 5Q <0 50 <0 50 <0 50* 2 5 <br /> 12124!2003 P 4708 930 3778 <50 — <0 50 <0 50 <0 50 <0 50 <0 50* 20 <br /> 03/12/2004 P 1888 918 970 <50 — <0 50 <0 50 <050 <0 50 <0 50* 17 <br /> 06!0112004 -- 1888 939 949 — - -- — -- — — Not Sampled <br /> 09120/2004 -- 18 88 949 939 -- -- -- -- — -- — INot Sampled <br /> OTCB 3!1412002 — — — -- <50 <0 50 <0 50 <0 50 <0 50 — <br /> SMW-1 10/7/1994 — 50 24 12 86 37 38 2,200 -- 250 110 <0 5 360 -- ~ <br /> 1211611994 5024 12 54 3770 5,200 — 740 210 330 600 — <br /> 2/28/1995 — <br /> 5024 1240 37 84 8,300 1,000 330 450 790 — -- <br /> 4/2611995 — 5024 1271 3753 5,100 -- 470 110 270 480 -- ~ <br /> 7/27/1995 -- 5024 1300 3724 1 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!1211996 -- 5024 1200 — 3,800 - 390 <05 220 98 — — <br /> 4/18/1996 5024 1258 -- 500 -- 60 <0 5 1 20 74 — -- <br /> 7/18/1996 -- 5024 1285 — 3,400 — 200 <5 130 56 60 - <br /> 11/15/1996 — 5024 1340 -- 2,500 -- 180 <2 5 62 21 590 -- <br /> 3/14/1997 NP 50 24 13 35 -- 1,700 -- 130 <0 5 <0 5 <0 5 230 013 <br /> 6!411997 NP 50 24 12 73 — 520 -- 36 3 1 1 4 1 5 47 005 <br /> 8/11/1997 -- 5024 -- — — -- -- -- — -- -- — <br /> 11/17/1997 NP 5024 1296 -- <50 — <0 5 <0 5 <05 <05 290 -- <br /> 3130l1998 NP 5024 1215 -- 910 46 <05 <0 5 1 1 110 16 <br /> 6!2511998 NP 5024 1270 — 692 -- 0 666 <0 5 <0 5 <D 5 76 5 16 <br /> 911111998 NP 50-D— 1290 — <50 — <0 5 <0 5 <0 5 <0 5 290 17 <br /> 12!1511998 -- 5024 -- -- — - — -- -- — -- After this sampling,Well <br /> no longer monitored or <br /> sampled <br /> Page 2of <br /> Report Date October 14,2004 4 27 <br />