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Table'I <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) (pg/L) (pglL) (mg/L) Comments <br /> MW-2 2/15/1990 -- 2633 535 2098 50 — 43 08 0 7 16 -- — <br /> 4/26/1990 -- 2633 550 2083 — — — -- -- -- — -- <br /> 7/12/1990 -- 2633 548 2085 80 -- 04 1 3 0 5 15 — — <br /> 8/27/1990 -- 2633 580 2053 -- — — — — .- --11/2/1990 — 2633 585 2048 - -- - -- I — — -- — <br /> 11/5/1990 -- 2633 587 2046 ND<50 — ND<0 3 ND<0 3 ND<0 3 ND<0 3 — — <br /> 2/25/1991 — 2633 534 2099 ND<50 -- ND<0 3 ND<0 3 ND<0 3 ND<0 3 — -- <br /> 6/27/1991 -- 2633 607 2026 ND<50 — ND<0 5 ND<0 5 ND<0 5 ND<0 5 -- — <br /> 9/25/1991 — 2633 636 1997 N0<0 30 -- ND<0 30 ND<0 30 ND<0 30 ND<0 30 — -- <br /> 12/10/1991 — 2633 586 2047 ND<0 30 — ND<0 30 ND<0 30 ND<0 30 ND<0 30 -- — <br /> 3/25/1992 -- 2633 542 2091 240 — 42 18 0 8 38 -- — <br /> 6/25/1992 — 2633 733 1900 ND<30 — ND<0 30 ND<0 30 ND<0 30 ND<0 30 — -- <br /> 12/8/1992 -- 2633 591 2042 61 — ND<0 5 ND<0 5 ND<0 5 ND<0 5 -- -- <br /> 3/10/1993 — 2633 569 2064 220 — 35 06 57 92 — -- <br /> 6/16/1993 -- 2633 353 2280 ND<50 — ND<0 5 ND<0 5 ND<0 5 ND<0 5 — -- <br /> 10/22/1993 — — — — 460 -- 09 07 14 08 1,700 — QC-9 <br /> 10/22/1993 -- 2633 606 2027 460 — 1 06 14 08 1 600 — <br /> 1/24/1994 — 2633 563 2070 ND<50 — ND<0 5 ND<0 5 ND<0 5 06 209 — <br /> 6/7/1994 — 2633 608 2025 ND<50 — ND<0 5 ND<0 5 ND<0 5 ND<0 5 ND<5 0 28 <br /> 9/13/9994 -- 2633 636 1997 ND<50 -- ND<0 5 ND<0 5 ND<0 5 ND<0 5 ND<5 0 81 <br /> 1/10/1995 — 2633 554 2079 100 — 6 2 ND<0 5 12 -- 52 <br /> 3/23/1995 -- 2633 563 2070 ND<50 — 053 ND<0 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<i 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<0 5 ND<1 0 ND<1 0 N0<1 0 57 42 <br /> 10/15/1997 -- — — — ND<50 — ND<0 5 ND<1 0 ND<1 0 ND<i 0 120 -- QC-1 <br /> 10/15/1997 -- 2633 608 2025 ND<50 -- ND<0 5 ND<1 0 ND<1 0 ND<1 0 120 54 <br /> 3/17/1998 — 2633 557 2076 170 — ND<0 5 ND<t 0 ND<1 0 ND<1 0 180 61 <br /> 1/611999 -- 2633 -- — — -- - -- -- — — — <br /> Report Date September 10,2004 Page 12 of 26 <br />