ARCHIVED REPORTS_XR0008044 CASE 1

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i • 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 TPNg TPHd Benzene Toluene benzene Xylenes MtBE DO Number Sampled NP (feet msl) (feet bgs) (feet msl) (pglL) (pglL) (pg/L) (pg/L) (pg/L) (pgll-) (pglL) (mg/L) Comments AMW-3 8/27/1990 — 2529 746 1783 11/2/1990 -- 2529 -- -- 11/5/1990 — 2529 758 1771 ND<50 — ND<0 3 ND<0 3 ND<0 3 ND<0 3 — — 2/25/1991 -- 2529 703 1826 ND<50 — ND<0 3 ND<0 3 ND<0 3 ND<0 3 — -- 6/27/1991 — 2529 760 1769 ND<50 -- ND<0 5 ND<0 5 ND<0 5 ND<0 5 — 9/25/1991 -- 2529 792 1737 ND<30 — ND<0 30 ND<0 30 ND<0 30 ND<0 30 — - 12/10/1991 -- 2529 756 1773 ND<30 -- ND<0 30 ND<0 30 ND<0 30 ND<0 30 -- - 3/25/1992 - 2529 716 1813 ND<30 -- ND<0 30 ND<0 30 ND<0 30 ND<0 30 - 6/25/1992 — 2529 805 1724 ND<30 — ND<0 30 ND<0 30 ND<0 30 ND<0 30 — -- 12/8/1992 -- 2529 737 1792 ND<50 -- ND<0 5 ND<0 5 ND<0 5 ND<0 5 — -- 3/10/1993 — 2629 709 1820 ND<50 — ND<0 5 ND<0 5 ND<0 5 ND<0 5 -- 6/16/1993 - 2529 721 1808 10/22/1993 -- 2529 744 1785 -- — - — -- -- _ _ 1/24/1994 -- 2529 722 1807 ND<50 — ND<0 5 ND<0 5 ND<0 5 ND<0 5 ND<5 0 — 6/7/1994 -- 2529 770 1759 ND<50 — ND<0 5 ND<0 5 ND<0 5 ND<0 5 ND<5 0 34 9/13/1994 — 2529 7 64 1765 — — — -- -- — — 1/10/1995 -- 2529 683 1846 3/23/1995 — 2529 664 1865 ND<50 — ND<0 50 ND<0 50 ND<0 50 ND<1 0 9 3 10/411995 — 2529 759 1770 - - - _ _ _ _ 1/411996 -- 2529 710 1819 -- — — - -_ _ _ — 3/29/1996 2529 697 1832 ND<50 — ND<0 5 ND<1 ND<1 ND<1 ND<10 38 7/1/1996 -- 2529 753 1776 -- — — — _ _ _ 10/15/1996 2529 775 1754 4/16/1997 - 2529 635 1894 10/15/1997 — 2529 750 1779 3/17/1998 2529 709 1820 1/6/1999 - 2529 725 1804 9/13/1999 — 2529 801 1728 — - - -- — — _ 1/19/2000 — 2529 700 1829 - — — — -- -- -. 4/12/2000 — 2529 731 1798 7/22/2000 - 2529 7 36 1793 -- — — — - -- 10/26/2000 -- 2529 738 1791 - -- -- — -- — _ _ 1/17/2001 — 2529 739 1790 — — - -- -- _ Report Date July 13,2004 Page 4 of 25