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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) (pg1L) (pg1L) (pglL.) (pg/L) (pg1L) (p91L) (pg/L) (mg/L) Comments <br /> MW-4 12/8/1992 — 2590 539 2051 -- — — — — — — -- Sheen <br /> 3/10/1993 -- 2590 4 95 2095 — — — — — — — Sheen <br /> 6/16/1993 — 2590 547 2043 — — - -- -- -- — — Sheen <br /> 10/22/1993 -- 2590 550 2040 — — — — — -- — — Sheen <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 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 It free product <br /> present,[a] <br /> 10/4/1995 - 2590 594 2007 -- -- -- — — — — — 0 14 It free product <br /> present,[a] <br /> 1/411996 - 2590 512 2078 1,700 27 2 5 36 58 25 08 <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 47 QC-1 <br /> 10/15/1996 — 2590 577 2013 2,100 — 39 ND<10 160 190 ND<100 47 <br /> 4/16/1997 — 2590 533 2057 5,000 — 173 ND<5 0 775 767 131 37 <br /> 10/15/1997 — 2590 571 2019 510 — 29 ND<1 0 91 636 25 73 <br /> 3/17/1998 -- 2590 487 2103 890 -- 36 ND<1 0 51 88 620 63 <br /> 1/6/1999 -- 2590 542 2048 4,100 — 11 19 180 110 84 -- <br /> 9/13/1999 — 2590 562 2028 2 400 — 42 6 5 89 21 330 -- <br /> 1/19/2000 — 2590 515 2075 5,200 — 72 ND<0 5 93 37 29 — <br /> 4/12/2000 -- 2590 580 2010 1 8,300 -- 71 1 5 5 200 61 55 -- <br /> 7/22/2000 -- 2590 567 2023 2,900 - 81 2 8 63 19 46 — <br /> 10/26/2000 — 2590 520 2070 2000 -- 16 NO<)5 27 24 23 - <br /> 1/17/2001 -- 2590 535 2055 820 -- 949 1 35 587 135 401 — <br /> 4/12/2001 -- 2590 535 2055 1,600 — 14 556 786 11 3 556 -- <br /> 5/23/2001 — 2590 551 2039 2,700 — 135 539 775 281 471 — <br /> 7/31/2001 2590 585 2005 1,400 -- 83 108 228 11 105 - <br /> 10/30/2001 — 2590 605 1985 390 -- 406 1 93 0 526 ND<1 5 253 — <br /> 1/29/2002 -- 2690 498 2092 720 — 454 292 396 ND<1 0 39 — <br /> Report Date December 16,2004 Page 17 of 26 <br />