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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 PI 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.) (pg/L) (pg/L) (pglL) (pg1L) (mg/L) Comments <br /> MW-5 10/15/1997 -- 2545 508 20 37 <br /> 3/17/1998 -- 2545 470 2075 <br /> 1/6/1999 — 2545 491 2054 <br /> 1/19/2000 -- 2545 465 2080 <br /> 4/12/2000 — 2545 560 1985 <br /> 7/22/2000 -- 2545 499 2046 <br /> 10/26/2000 -- 2545 457 2088 <br /> 1/17/2001 - 2545 515 2030 <br /> 4/12/2001 — 2545 4 83 2062 <br /> 5/23/2001 -- 2545 4 85 2060 120 — 0 653 ND<0 5 ND<0 5 ND<1 5 619 -- <br /> 7/31/2001 — 2545 512 2033 340 -- 121 ND<0 5 0 527 ND<1 5 463 — <br /> 10/30/2001 - 2545 4 97 2048 390 — 424 ND<0 5 215 ND<i 5 50 9 — <br /> 1/29/2002 — 2545 446 2099 ND<50 -- ND<0 5 ND<0 5 ND<0 5 ND<l 0 493 — <br /> 4/30/2002 — 2545 475 2070 100 — ND<0 5 ND<0 5 ND<0 5 ND<l 0 383 — <br /> 7/30/2002 P 2545 492 2053 600 -- 232 ND<2 5 429 ND<5 579 <br /> 10/31/2002 P 2545 500 2045 81 — 17 ND<0 5 ND<0 5 ND<0 5 13 — <br /> 01I30/2003 P 2545 479 2066 77 -- <0 50 <0 50 <0 50 <0 50 38 — <br /> 04/30/2003 P 2545 4 69 2076 74 -- <0 50 <0 50 <0 50 <0 50 17 -- <br /> 07/30/2003 P 2545 522 2023 120 -- 14 <1 0 <1 0 <1 0 67 — <br /> 10/29/2003 P 2545 509 2036 110 -- 077 <0 50 <0 50 <0 50 18 — <br /> 01/26/2004 P 2545 475 2070 <50 — <050 <050 <0 50 <0 50 12 — <br /> 04I27/2004 P 2545 4 97 2048 65 - <0 50 <0 50 <0 50 <0 50 90 1 — <br /> 07130/20041 P 1 2543 530 2015 <50 — <050 <0 50 <0 50 <0 50 43 -- <br /> MW-6 2/9/1987 — -- — -- 13 000 — 100 210 — 2,200 -- — <br /> 9/21/1987 — -- — - 370,000 — 4,000 77 -- 4,400 — -- <br /> 10/20/1987 — -- — — 5,300 -- 210 4 — 97 -- — <br /> 11/20/1987 -- — -- 270 -- ND<0 5 1,800 — 9 -- -- <br /> 3/13/1988 — 2563 4 38 2125 — — — — — — _ <br /> 3/23/1988 -- 2563 442 2121 6,300 — 490 6 9 — 1,100 — — <br /> 6/7/1988 — 2563 470 2093 — — -- — — _ _ — <br /> 10/18/1988 -- 2563 678 1885 2,800 — 140 43 81 370 -- — <br /> 2/15/1990 -- 2563 425 2138 5,700 -- 220 21 330 250 -- — <br /> 4I2611990 -- 2563 450 2113 -- -- — -- — -- _ <br /> Report Date September 10,2004 Page 19 of 26 <br />