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Table 1 <br /> Groundwater Elevation and Analytical Data <br /> Former BP Service Station 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) (ug1L) (pg1L) (uglL) (pg1L) (pg/L) (Ng/L) WglL) (mg/L) Comments <br /> MW-2 6/27/1991 -- 2633 607 2026 ND<50 -- N0<0 5 ND<O 5 ND<O 5 ND<O 5 -- -- <br /> 9/25/1991 — 2633 636 1997 ND<O 30 -- ND<O 30 N0<0 30 ND<O 30 ND<O 30 — — <br /> 12/10/1991 -- 2633 586 2047 ND<O 30 -- ND<O 30 ND<O 30 ND<O 30 ND<O 30 — — <br /> 3/25/1992 — 1 2633 542 2091 240 — 42 18 08 38 — — <br /> 6/25/1992 — 2633 733 1900 ND<30 — ND<O 30 ND<O 30 ND<O 30 ND<O 30 -- -- <br /> 12/8/1992 — 2633 591 2042 61 — ND<O 5 ND<O 5 ND<O 5 ND<O 5 — <br /> M011993 — 2633 569 20 64 220 — 35 06 5 7 92 - -- <br /> 6116/1993 -- 2633 3 53 2280 ND<50 -- ND<O 5 ND<O 5 N0<0 5 ND<0 5 — — <br /> 10/22/1993 — — — 460 -- 09 07 14 08 1 700 -- QC-1 <br /> 10/22/1993 — 2633 606 2027 460 -- 1 06 1 4 08 1,600 -- <br /> 1/24/1994 -- 2633 563 2070 ND<50 -- ND<O 5 ND<O 5 ND<O 5 06 209 -- <br /> 6/7/1994 -- 2633 608 2025 ND<50 — ND<O 5 ND<O 5 ND<O 5 ND<O 5 ND<5 0 28 <br /> 9/13/1994 -- 2633 636 1997 1 ND<50 - ND<O 5 ND<O 5 ND<O 5 ND<O 5 ND<5 0 81 <br /> 1/10/1995 — 2633 554 2079 100 — 6 2 ND<O 5 12 -- 52 <br /> 3/23/1995 — 2633 563 2070 ND<50 - 053 ND<O 50 051 19 -- 89 <br /> 10/4/1995 — 2633 637 1996 210 — ND<1 0 ND<1 0 ND<1 0 ND<2 0 840 71 <br /> 1/4/1996 -- 2633 590 2043 3,900 -- ND<25 ND<25 ND<25 ND<50 12,000 3 <br /> 3/29/1996 — -- — — 11,000 -- 37 9 4 5 13,000 — QC-1 <br /> 3/29/1996 — 2633 659 1974 9200 — 34 9 3 4 12,000 36 <br /> 7/1/1996 — 2633 716 1917 5,200 -- 58 33 ND<1 ND<1 10,000 31 <br /> 10/15/1996 — 2633 734 1899 ND<250 — ND<2 5 ND<5 0 ND<5 0 ND<5 0 14,000 4 <br /> 4/16/1997 — 2633 598 2035 180 — ND<O 5 ND<1 0 ND<1 0 ND<1 0 57 42 <br /> 10/15/1997 — — -- -- ND<50 — ND<0 5 ND<1 0 ND<1 0 ND<1 0 120 -- QC-1 <br /> 10/15/1997 - 2633 608 2025 ND<50 — ND<O 5 ND<1 0 ND<1 0 ND<1 0 120 54 <br /> 3/17/1998 - 2633 557 2076 170 — N0<0 5 ND<1 0 ND<1 0 ND<1 0 180 61 <br /> 1/6/1999 — 2633 -- -- — — -- -- -- - — — <br /> 9/13/1999 -- 2633 561 2072 480 — 35 73 ND<5 0 ND<5 0 99,000191,000 - <br /> 1/19/2000 -- 2633 561 2072 800 - 11 ND<O 5 ND<O 5 1 2 84 000 — <br /> 4/12/2000 2633 613 2020 1 600 — 42 ND<O 5 ND<O 5 ND<0 5 11 000 -- <br /> 7/22/2000 -- 2633 598 2035 3,800 — 63 086 063 72 90,000 -- <br /> 10/26/2000 — 2633 501 2132 1 100 — 09 N0<0 5 ND<O 5 069 3 400 — <br /> 1/17/2001 -- 2633 514 21 19 18 000 — 109 ND<5 0 ND<5 0 ND<5 0 28,200 -- <br /> 4/12/2001 — 2633 581 2052 700 -- ND<O 5 ND<O 5 ND<O 5 ND<1 5 946 — <br /> Report Date July 13,2004 Page 12 of 25 <br />