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Table 1 <br /> Groundwater Elevation and Analytical Data <br /> Former BP Retail Site No 11194 <br /> 2375 Tracy Blvd, Tracy, CA <br /> TOC Depth to Water Level Ethyl- Total <br /> Well Date P/ Elevation Water Elevation TPHg TPHd Benzene Toluene benzene Xylenes MtBE DO <br /> Number Sampled NP (feet msl) (feet bgs) (feet msl) (pg/L) (,ug/L) (pg/L) (pglL) (pg/L) (pg/L) (pglL) (mg/L) Comments <br /> MW-6 2/15/1990 - 2563 425 2138 5,700 — 220 21 330 250 — -- <br /> 4/26/1990 - 2563 450 2113 -- — -_ -_ — <br /> 711211990 — 2563 468 2095 14,000 -- 590 18 1,100 750 <br /> 8/27/1990 -- 2563 -- -- — .. — — — _ <br /> 11/211990 — 2563 — <br /> 11/5/1990 -- 2563 502 2061 19,000 — 390 17 1,200 650 -- <br /> 2/25/1991 -- 2563 410 2153 6,600 — 310 14 410 110 — — <br /> 6/27/1991 — 2563 509 2054 170,000 -- 260 61 140 370 — -- <br /> 9/25/1991 -- 2563 560 2003 20,000 — 510 19 910 340 - — <br /> 12/10/1991 — 2563 4 88 2075 7,500 — 170 69 350 60 -- — <br /> 3/25/1992 — 2563 428 2135 5100 -- 920 30 990 360 — — <br /> 6/25/1992 -- 25 63 6 79 1954 -- — -- — — -- - — 0 87 ft free product <br /> present,[a] <br /> 12!811992 -- 2563 478 2085 — - — -- -- — Sheen <br /> 3/10/1993 -- 2563 423 --21-40 -- — -- — - — -- -- Sheen <br /> 6/16/1993 — 25 63 478 20 85 - - — -- Sheen <br /> 10/22/1993 -- 25 63 4 94 20 69 -- — -- — -- — -- — Sheen <br /> 1/24/1994 -- 2563 4 65 20 98 4,700 — 320 24 440 100 673 - <br /> 6/7/1994 -- 2563 511 2052 -- — — _ — <br /> 9/13/1994 -- 2563 5 71 1992 -- <br /> 1/10/1995 — 2563 322 2241 <br /> 3/23/1995 - 2563 386 21 77 <br /> 10/4/1995 2563 533 2030 <br /> 1/411996 25 63 —431 2132 <br /> 3/29/1996 2563 417 2146 <br /> 7/1/1996 - 2563 472 2091 <br /> 10/15/1996 -- 25 63 499 2064 <br /> 4/16/1997 — 2563 363 2200 <br /> 10/15/1997 -- 2563 480 2083 <br /> 3/17/1998 2563. 440 2123 <br /> 3/1711998 -- 2563 511 2052 <br /> 1/6/1999 2563 473 2090 31 000 -- 220 ND<50 820 150 13,000 — <br /> 9/13/1999 2563 4 99 2064 11,000 — 50 54 1 420 83 14 -- <br /> tReport Date ApnI8, 2005 Page 21 of 27 <br />