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Table I <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 ms I) (feet bgs) (feet ms]) (pg/L) (pg1L) (pg/L) (pglL) (pg/L) (pg/L) (pg/L) (mg/L) Comments <br /> MW-4 6/7/1988 - 2590 525 2065 — — -- -- -- -- — — <br /> 10/18/1988 — 2590 5 55 2035 1,100 — 75 28 13 35 — -- <br /> 2/15/1990 - 2590 490 2100 1,800 — 370 43 130 98 — — <br /> 4/26/1990 — 2590 505 2085 — — — -- -- -- — <br /> 7/12/1990 — 2590 516 2074 3,100 510 41 220 320 - — <br /> 8/27/1990 -- 2590 546 2044 -- — — — — -- —11/2/1990 -- 2590 551 2039 -- — — -- — -- — -. <br /> 11/511990 -- 2590 553 2037 950 — 330 18 52 29 — - <br /> 2/25/1991 -- 2590 4 73 21 17 370 -- 120 3 3 22 13 -- -- <br /> 6/27/1991 -- 2590 564 2026 1,500 — 130 ND<0 5 1 21 18 -- -- <br /> 9/25/1991 — 2590 660 1930 810 — 70 49 12 110 — -- <br /> 12/10/1991 -- 2590 543 2047 1,300 -- 100 14 62 110 -- -- <br /> 3/25/1992 — 2590 489 2101 1,400 — 500 40 210 320 — — <br /> 8/25/1992 -- 2590 711 1910 -- -- — -- — — -- — 0 40 ft free product <br /> present,[a] <br /> 12/8/1992 -- 2590 539 2051 - — — -- — — - — Sheen <br /> 3/10/1993 — 2590 495 2095 - — — — -- — — Sheen <br /> 6/16/1993 — 2590 547 2043 — -- -- -- -- — -- Sheen <br /> 10/22/1993 — 2590 5 50 2040 — — — — — — — -- Sheen <br /> 1/24/1994 — 2590 5 54 2036 6,900 — 88 16 130 340 582 — <br /> 6/7/1994 -- 2590 598 1992 23,000 -- 210 30 720 1,200 138 32 <br /> 9/13/1994 -- — — -- 5,600 -- 21 13 220 500 -- — Qat <br /> 9/13/1994 -- 2590 4 83 2107 5,100 -- 86 1 280 510 — 62 <br /> 9/13/1994 -- 2590 642 1948 9,000 — 20 15 240 550 68 7 <br /> 1/10/1995 — -- -- -- 2,300 74 1 220 380 -- — QC-1 <br /> 3/23/1995 — 2590 472 2125 — — — -- .- -- -- — 0 09 ft free product <br /> present,[a] <br /> 10/4/1995 — 2590 594 2007 — -- — — — .- — -- 0 14 ft free product <br /> present,[a] <br /> 1/4/1996 — 2590 512 2078 1,700 — 27 25 36 58 25 0 8 <br /> 3/29/1996 -- 2590 497 2093 1,300 -- 76 ND<1 36 32 ND<10 24 <br /> 7/1/1996 -- 2590 557 2033 11,000 -- 160 49 590 836 ND<100 4 <br /> 10/15/1996 -- -- — — 1,100 — 22 ND<5 0 75 85 ND<50 4 7 QC-1 <br /> 10/15/1996 — 2590 577 2013 2,100 — 39 ND<10 160 190 ND<100 4 7 <br /> Report Date April 8,2005 Page 17 of 27 <br />