ARCHIVED REPORTS_XR0008093 CASE 1

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Table 1 Groundwater Monitoring and Analytical Data BP Oil No 11194 2375 Tracy Boulevard Tracy California Well Date Well Depth to Product 3roundwalei TPHg 8 T E X MUSE DO Number Sampled Elevation Water Thickness Elevation (ug/L) (Mg/L) (Ng/L) (pg/L) W91L) (yg1L) OWL) (Feet) (Feet) (Feet) (Feet) APVV I—WI oil 990 2529 8/27/1990 2529 746 — t7 83 - - 11/20990 2529 - - — w 11/5/1990 2529 758 1771 ND<50 ND<O 3 NO<O 3 ND<O 3 ND<0 3 - 212511991 2529 703 — 1826 ND<50 ND<O 3 ND<O 3 ND<O 3 ND<O 3 -- 6127/1991 2529 760 — 1769 ND<50 ND<0 5 ND<O 5 ND<O 5 ND<O 5 9/25/1991 2529 792 — 1737 ND<30 ND<0 30 ND<O 30 ND<O 30 ND<0 30 - 12/10/1991 2529 756 — 1773 ND<30 ND<0 30 ND<O 30 ND<O 30 ND<O 30 - 3l25/1992 2529 7 16 - 1813 ND<30 ND<O 30 ND<O 30 ND<O 30 ND<O 30 - — 6/2511992 25 29 8 05 - 1724 ND<30 ND<O 30 ND<O 30 ND<O 30 ND<O 30 — 12/811992 2529 737 1792 ND<50 ND<O 5 ND<O 5 ND<O 5 ND<O 5 -- - 3/10/1993 2529 709 - 1820 ND<50 ND<O 5 ND<O 5 ND<O 5 ND<0 5 6116/1993 2529 721 1808 — - — 10/22/1993 2529 744 1785 — — - - 1/24/1994 2529 722 - 1807 ND<50 ND<O 5 ND<0 5 ND<O 5 ND<O 5 ND<5 0 - V7/1994 2529 770 1759 ND<50 ND<O 5 ND<0 5 ND<0 5 ND<O 5 ND<5 0 34 9/13/1994 2529 764 1765 — - - — 1/10/1995 2529 683 — 1846 — 3/23/1995 2529 664 1865 NO<50 ND<O 50 ND<O 50 ND<O 50 ND<t 0 - 93 10/4/1995 2529 759 — 1770 - — - _- 1/4/1996 2529 7 10 — 1819 — — 3/29/1996 2,529 697 - 1832 ND<50 ND<O 5 ND<t ND<t ND<1 ND<10 38 7/1/1996 2529 753 — 17 76 - 10/15/1996 2529 775 — 1754 -- - — - 4/16/1997 2529 635 - 1894 - — - 10/1511997 2529 750 1779 — -3/1711998 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 736 1793 - 10/26/2000 2529 738 -- 1791 -- - - - — • 1H7/200t2529 739 _ 1790 4/12/2001 2529 730 1799 5/23/2001 2529 718 - 1811 ND<50 ND<0 5 ND<0 5 ND<0 5 ND<1 5 4 6 7/31/2001 2529 744 1785 63 ND<0 5 ND<O 5 ND<0 5 N[)<1 5 838 10130!2001 2529 747 - 1782 ND<50 ND<O 5 ND<0 5 ND<O 5 ND<1 5 ND<O 5 — 1/29/2002 2529 703 -- 1826 ND<50 ND<O 5 ND<0 5 ND<O 5 ND<1 0 599 — 4/30/2002 2529 718 - 1811 ND<50 ND<O 5 ND<O 5 ND<O 5 ND<1 0 574 — 7/30/2002 P 2529 737 - 1792 ND<50 ND<O 5 ND<0 5 ND<O 5 ND<1 0 72 10/31/2002 P 2529 665 1864 ND<50 ND<O 5 ND<O 5 ND<0 5 ND<0 5 64 — 1/30/2003 P 2529 755 1774 ND<50 ND<O 5 ND<O 5 ND<0 5 ND<O 5 41 -- 4/30/2003 P 2529 704 - 1825 <50 <0 5 <0 5 <0 5 <05 25 7/30/2003 2529 _ Inaccessible-Not Sampled - --- - I D/2912003 P 2529 741 — 1785 <50 <0 5 <G5 c0 5 <0 5 76 AMW-4 BY1671990 2b�Jij 483 ?U-10 < - — 8/27/1990 2,536 483 - 2053 -- - —11/211990 2536 489 2047 - 111b1199U 2b 3b 4 k58 — 2U 48 NU<b0 U 3 NU 2/25/1991 2536 400 2128 ND<50 ND<O 3 ND<0 3 ND<O 3 ND<O 3 -- — 6/27/1991 2536 501 - 2035 ND<50 N0<0 5 ND<O 5 ND<O 5 ND<O 5 — 9/25/1991 2536 545 - 1991 ND<30 ND<O 30 ND<0 30 ND<0 30 ND<O 30 — 12/10/1991 2536 479 2057 ND<30 ND<O 30 ND<O 30 ND<0 30 N0<0 30 — - 3/25/1991 2536 426 - 21 10 ND<30 ND<0 30 ND<O 30 ND<O 30 ND<O 30 - - 6/25/1992 2536 616 1920 ND<30 ND<O 30 ND<0 30 ND<O 30 ND<O 30 — 12/8/1992 2536 474 2062 ND<50 ND<O 5 ND<0 5 ND<O 5 ND<O 5 3/10/t993 2536 428 — 2108 ND<50 ND<O 5 ND<0 5 ND<O 5 ND<O 5 - — 6/16/1993 2536 406 — 2130 ND<50 ND<O 5 140<0 5 ND<O 5 ND<0 5 — — 10/22/1993 2536 485 2051 ND<50 ND<0 5 ND<0 5 ND<0 5 ND<0 5 ND<5 0 1/24/1994 2536 481 - 20 55 HD<50 ND<0 5 ND<O 5 ND<0 5 ND<O 5 ND<5 0 — 6/7/1994 2536 530 — 2006 ND<50 ND<O 5 ND<O 5 ND<O 5 ND<O 5 ND<5 0 34 9/13/1994 25-36 559 — 1977 ND<50 ND<0 5 ND<0 5 ND<O 5 ND<0 5 ND<5 0 69 1/10/1995 2536 422 21 14 ND<50 ND<O 5 ND<0 5 ND<O 5 ND<1 - 71 3/23/1995 2536 398 - 21 38 ND<50 ND<O 50 ND<O 50 ND<0 50 ND<l 0 — 79 10/4/1995 2536 532 - 2004 ND<50 ND 1/4/1996 2536 448 2088 ND<50 ND<O 50 ND<0 50 ND<0 50 N0<1 0 ND<5 0 10 3/29/1996 2536 432 21 04 ND<50 ND<O 5 NDO ND<1 ND<l ND<10 37 7/1/1996 2536 488 - 2048 ND<50 ND<O 5 ND<1 ND<1 ND<1 ND<10 61 10/15!1996 2536 509 2027 N0<50 ND<O 5 ND<1 0 N0<1 0 ND<1 O ND<10 75 4/1611997 2536 367 - 21 69 - - — — — — k\W prOcoss\J5 BP ARCO\1119410uarterly\4 QTR 03N 1194 GW MR 4003 Page 9 of 11