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i <br /> 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 P1 Elevation Water Elevation TPHg TPHd Benzene Toluene benzene Xylenes MtBE DO <br /> Number Sampled NP (feet msl) (feet bgs) (feet msl) (pg1L) (pg/L) (pg1L) (pg/L) (pglL) (pgfL) W/L) (mg/L) Comments <br /> MW-4 4/30/2002 — 2590 522 2068 2,100 -- 411 374 329 ND<5 0 105 — <br /> 7/30/2002 P 2590 559 2031 1,100 — 108 119 335 621 395 -- <br /> 10/31/2002 P 2590 550 2040 1,900 — 42 36 76 10 10 — <br /> 01/30/2003 P 2590 531 2059 600 -- 14 <0 50 27 086 32 — <br /> 04/30/2003 P 2590 515 2075 1,200 — 084 J <0 50 93 36 41 — <br /> 07/30/2003 P 2590 580 2010 260 — <12 <12 <1 2 <1 2 49 — <br /> 10/29/2003 P 2590 563 2027 1,300 — 34 J <1 0 1 55 J <1 0 79 J — <br /> 01/26/2004 P 2590 530 2060 770 — <50 <60 <5 0 <50 16 — <br /> 04/28/2004 P 2590 547 2043 130 — <050 <0 50 <0 50 <0 50 84 — Water Level data from <br /> 4!27104 <br /> 07130/2004 P 2590 597 1993 270 -- 0 53 <0 50 069 <0 50 31 — <br /> 1012812004 P 2590 554 2036 2,000 — <50 <50 10 <5 0 120 — <br /> MW-5 2/9/1987 — — — — 41,000 — 2,300 2,500 — 6,220 — — <br /> 9/21/1987 — — — -- 18,000 — 790 14 — 2,200 — — <br /> 10/20/1987 — -- — -- 34,000 — 50 ND<0 5 _ 1,200 — — <br /> 11/20/1987 — — — — 8,700 — 210 6,600 -- 230 — — <br /> 3/13/1988 — 2545 473 2072 — — — — - — <br /> 3/23/1988 — 2545 479 2066 6,200 -- 420 5 — 600 — — <br /> 6f7/1988 — 2545 485 2060 — — — — -- — <br /> 10/18/1988 — 2545 545 2000 1 300 — 34 09 1 170 — -- <br /> 2/15/1990 — 2545 445 2100 1,900 -- 220 21 330 250 -- -- <br /> 4/26/1990 — 2545 465 2080 -- — -- — — — - - <br /> 7/12/1990 — 2545 472 2073 4 400 — 140 94 130 300 - -- <br /> 8/27/1990 — 2545 515 2030 — — — — -- -- — — <br /> 1101990 -- 2545 520 2025 — — — — -- — <br /> 11/5/1990 — 2545 521 2024 7,500 — 430 55 760 1,600 — — <br /> 2/25/1991 - 2545 429 2116 2,400 — 160 59 120 96 <br /> 6/27/1991 -- 2545 534 2011 ND<50 — 67 ND<0 5 N0<0 5 ND<0 5 — — <br /> 9/25/1991 -- 2545 574 1971 1,800 — 120 39 79 94 — — <br /> 12/10/1991 -- 2545 510 2035 720 -- 46 34 38 58 — — <br /> 3/25/1992 — 2545 432 2113 550 — 75 033 4 32 — <br /> 6/25/1992 - 2545 -- - - - - - -- - - <br /> 12/8/1992 -- 2545 1162 1383 <br /> Report Date December 16,2004 Page 18 of 26 <br />