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i • r <br /> Table 1 <br /> Groundwater Elevation and Analytical Data <br /> Former BP Service Station No 11194 <br /> 2375 Tracy Blvd, Tracy CA <br /> Top of Depth to Water Level Ethyl- Total <br /> Well Date PI Casing Water Elevation TPHg TPHd Benzene Toluene benzene Xylenes MtBE DO <br /> Number Sampled NP Elevation (feet bgs) (feet ms I) (pg/L) (pg/L) (pg/L) (pg1L) (pg/L) (pg/L) (pg1L) (mg1L) Comments <br /> MW-4 9/2/1986 — — -- — 48,000 -- 3,000 3,200 — 4 700 — -- <br /> 2/9/1987 -- - — -- 14,000 — 230 160 — 880 -- <br /> 9/21/1987 -- — — 14 000 — 620 83 - 1,600 — -- <br /> 1MOM 987 - -- — 4 900 -- 50 ND<O 5 - ND<O 5 — — <br /> 11/20/1987 -- — _ - 2,500 -- 240 7,300 -- 260 — — <br /> 3/13/1988 — 2590 504 2086 -- — -- -- — ~ — <br /> 3/2311988 — 2590 508 2082 76 — 10 16 - 13 — -- <br /> 61711988 — 2590 525 2065 1 — -- — -- - — - — <br /> 10/18/1988 - 2590 555 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 20 <br /> 11/2/1990 -- 2590 5 51 2039 — -- -- ~ —11/5/1990 — 2590 553 2037 950 — 330 18 52 29 — -- <br /> 2/25/1991 — 2590 473 21 17 370 -- 120 33 22 13 - — <br /> 6/27/1991 -- 2590 564 2026 1 500 — 130 ND<O 5 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 21 01 1 400 -- 500 40 210 320 -- <br /> 6/25/1992 — 2590 711 1839 -- -- — -- -- — — <br /> 12/8/1992 2590 539 2051 - <br /> 3/10/1993 - 2590 495 2095 <br /> 6/16/1993 — 2590 547 2043 -- <br /> 10/22/1993 2590 550 2040 — -- — -- -- — <br /> 1/24/1994 — 2590 554 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 -- -- QC-1 <br /> 9/13/1994 - 2590 483 21 07 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 1 2109 — -- -- -- ~ <br /> 10/4/1995 — 2590 594 1982 — - -- - -- — -- '- <br /> _ � I <br /> Report Date April 28,2004 Page 15 of 24 <br />