ARCHIVED REPORTS_XR0008044 CASE 1

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i ! • Table 1 Groundwater Elevation and Analytical Data Former BP Service Station No 11194 2375 Tracy Blvd, Tracy, CA TOC Depth to Water Level Ethyl- Total Well Date PI Elevation Water Elevation TPHg TPHd Benzene Toluene benzene Xylenes MtBE DO Number Sampled NP (feet msl) (feet bgs) (feet msl) (pglL) (pg/L) (pgll-) UQJL) (pg1L) (pglL) (991L) (mglL) Comments MW-1 3/13/1988 2688 588 2100 3/23/1988 2688 588 21 00 ND<50 — ND<0 5 ND<0 5 -- ND-<O 5 -- — 6/7/1988 - 2688 595 2093 10/18/1988 -- 2688 625 2063 ND<50 — ND<0 5 ND<0 5 ND<0 5 ND<0 5 -- 2/15/1990 - 2688 595 2093 ND<50 -- ND<0 3 ND<0 3 ND<0 3 ND<0 3 — -- 4/26/1990 2688 608 2080 7/12/1990 -- 2688 611 2077 ND<50 — ND<0 3 ND<0 3 ND<0 3 ND<0 3 -- — 8/27/1990 2688 545 2143 11/2!1990 — 2688 651 2037 11/5/1990 — 2688 653 2035 ND<50 -- ND<0 3 ND<0 3 ND<0 3 ND<0 3 -- -- 2/25/1991 -- 2688 575 2113 ND<50 -- ND<0 3 ND<0 3 ND<0 3 ND<0 3 — -- 6/27/1991 — 2688 666 2022 ND<50 -- ND<0 5 ND<0 5 ND<0 5 ND<0 5 - — 9/25/1991 -- 2688 704 1984 ND<30 — ND<0 30 ND<0 30 ND<0 30 ND<0 30 - 12/10/1991 2688 646 2042 ND<30 - ND<0 30 ND<0 30 ND<0 30 ND<0 30 -- — 3/25/1992 2688 5 95 2093 ND<30 - ND<0 30 ND<0 30 ND<0 30 ND<0 30 -- 6/25/1992 — 2688 802 1886 ND<30 ND<0 30 ND<0 30 ND<0 30 ND<0 30 -- 12/8/1992 - 26 88 644 2044 ND<50 ND<0 5 ND<0 5 ND<0 5 ND<0 5 -- 3/10/1993 - 2688 601 2087 ND<50 - ND<0 5 ND<0 5 ND<0 5 ND<0 5 -- 6/16/1993 2688 567 2121 10/22/1993 -- 2688 649 2039 1/2411994 - 2688 638 2050 6/7/1994 2688 684 2004 ND<50 ND<0 5 ND<0 5 ND<0 5 ND<0 5 ND<5 0 34 9/13/1994 2688 713 1975 1/10/1995 2688 593 2095 3/23/1995 - 2688 568 2120 ND<50 - ND<0 50 ND<0 50 ND<0 50 ND<1 0 97 10/4/1995 2688 696 1992 1/4/1996 -- 2688 624 2064 -- _ _ -- 3129/1996 2688 605 2083 ND<50 ND<0 5 ND<1 ND<1 ND<1 ND<10 38 7/1/1996 - 2688 661 2027 -- - _ __ __ -- 10115/1996 2688 680 2008 4/16/1997 -- 2688 540 2148 10/15/1997 -- 2688 675 2013 3/17/1998 — 2688 634 2054 Report Date July 13,2004 Page 10 of 25