ARCHIVED REPORTS_XR0008094 CASE 1

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Table 1 Groundwater Monitoring and Analytical Data BP Oil#11194 2375 Tracy Blvd,Tracy,California Well Date Well Depth to Product Groundwater TPHg B T E X MtBE DO Number Sampled Elevation Water Thickness Elevation (1491L) (Pg1L) (I4911L) (PWL) (µget.) (µgel.) (m9(L) (Feet) (Feet) (Feet) (Feet) AMW-1 1/2 j;!0 z 2053 486 -- zi 57 NU<50 (Confd) 4/30/2002 2653 491 --- 2162 ND<50 ND<0 5 ND<O 5 ND<O 5 ND<1 0 ND<O 5 --- 7/30/2002 P 2653 591 2062 ND<50 ND<O 5 ND<O 5 ND<O 5 ND<1 0 ND<O 5 --- 10/31l2002 P 2653 551 -- 2102 ND<50 ND<Q 5 ND<O 5 ND<O 5 ND<O 5 ND<2 5 --- 1/30/2003 P 26S3 539 – 21 14 ND<SO ND<0 5 ND<O 5 ND<O 5 ND<O 5 ND<0 5 — 413 012 003 P 2653 521 – 2132 <50 <05 <0 5 <0 5 <05 <2 5 --- 7/30/2003 P 2653 600 -- 2053 <50 <05 <0 5 <0 5 <05 <0 5 — 711211990 2645 521 - 2124 ND<50 ND<O 3 ND<O 3 ND<O 3 ND<O 3 -- 8/27/1990 2645 546 --- 2099 --- 111211990 -11/2/1990 2645 547 --- 2098 --- - - --- --- 11/511990 2645 549 --- 2096 ND<50 ND<O 3 ND<O 3 ND<0 3 ND<O 3 2/25/1991 2645 456 --- 2189 ND<50 ND<O 3 ND<O 3 ND<0 3 ND<O 3 - 6/27/1991 2645 560 --- 2085 ND<50 ND<O 5 ND<O 5 ND<Q 5 ND<O 5 - 9/25/1991 2645 607 --- 2038 ND<30 ND<O 30 ND<O 30 ND<O 30 ND<O 30 – 12/10/1991 2645 534 --- 2111 ND<30 ND<O 30 ND<0 30 ND<O 30 ND<0 30 - 3/250991 2645 470 2175 ND<30 ND<O 30 ND<O 30 ND<0 30 ND<0 30 --- - 6/25(1992 2645 684 --- 1961 ND<30 ND<O 30 ND<O 30 ND<0 30 ND<O 30 --- - 12/8/1992 2645 528 --- 2117 ND<50 ND<0 5 ND<O 5 ND<O 5 ND<O 5 --- 3/10/1993 2645 468 --- 2177 ND<50 ND<O 5 ND<O 5 ND<0 5 ND<O 5 --- 6/16/1993 2645 489 --- 2156 -- -- --- --- 10/22/1993 2645 538 --- 2107 - -- --- - 1/24/1994 2645 506 2139 --- -- --- --- 61711994 2645 SSI -- 2094 ND<50 ND<O 5 ND<O 5 ND<O 5 ND<O 5 ND<5 0 35 9/13/1994 2645 616 --- 2029 --- --- --- --- --- --- 1/10/1995 2645 472 2173 --- – --- --- - --- 3/2311995 2645 440 --- 2205 62 ND<O 50 ND<O 50 ND<O 50 ND<1 0 -- 97 10/4/1995 2645 592 --- 2053 --- --- --- 1996 26 45 490 2155 -- - 3/29/2,9/1996 2645 473 2172 ND<50 ND<0 5 NDD<1 NDD<1 ND<1 NDc10 32 7/1/7996 2645 528 2117 10/15/1996 2845 $49 2096 – - 4/16/1997 2645 413 2232 -- 10/15/1997 2645 567 --- 2078 -- - - 3/17/1998 2645 523 - 2122 - 1/6/1999 2645 523 --- 2122 – 9/19/1999 2645 519 --- 2126 --- --- -- 1/19/2000 2645 489 21 56 – 4/12/2000 2645 509 --- 2136 --- --- --- 7/22/2000 2645 549 - 2096 --- --- --- 10/26/2000 2645 535 21 1 D --- --- --- 1/17/2001 2645 540 2105 --- 4/12/2001 2645 SIS 2130 --- - --- --- - 5/23(2001 2645 531 2114 ND<50 ND<0 5 ND<O 5 ND<O 5 ND<1 5 ND<O 5 7/31/2001 2645 557 - 2088 ND<50 ND<O 5 ND<O 5 ND<O 5 ND<1 5 ND<O 5 10/30/2001 2645 548 2097 ND<50 ND<O 5 ND<O 5 ND<O 5 ND<l 5 ND<O 5 1/29/2002 2645 477 2168 ND<50 ND<D 5 ND<O 5 ND<O 5 ND<7 0 ND<O 5 --- 4/30/2002 2645 513 2132 ND<50 ND<O 5 ND<O 5 ND<O 5 ND<1 0 ND<O 5 -- 7/3012002 - 7/3012002 P 2645 545 --- 2100 ND<50 ND<0 5 ND<O 5 ND<O 5 ND<l 0 ND<O 5 --- 10/31/2002 P 2645 543 --- 2102 ND<50 ND<O 5 ND<O 5 ND<O 5 ND<0 5 ND<2 5 --- 1/30/2003 P 2645 511 -- 2134 ND<50 ND<O 5 ND<0 5 ND<0 5 ND<O 5 ND<O 5 -- 4/30/2003 P 2645 491 --- 2154 <50 <0 5 <0 5 <0 5 <0 5 <2 5 --- 7/30/2003 P 2645 568 — 2077 <50 <0 5 <0 5 <05 <0 5 <0 5 --- AMW 3 8/10/1990 2529 746 1783 90 0 f) 41 28 21 -- 8/27/1990 2529 746 1783 --- - --- - 11/2/1990 2529 --- --- -- - - 11/5/1990 2529 758 --- 1771 ND<50 ND<O 3 ND<O 3 ND<O 3 ND<O 3 - 2/25/1991 2529 703 --- 1826 ND<50 ND<Q 3 ND<0 3 ND<O 3 ND<O 3 - 6/27/1991 2529 760 1769 ND<50 ND<O 5 ND<0 5 ND<O 5 ND<O 5 -- 9/25/1991 2529 792 1737 ND<30 ND<0 30 ND<O 30 N0<0 30 ND<0 30 --- 12/10/1991 2529 756 --- 1773 ND<30 ND<0 30 ND<D 30 ND<O 30 ND<0 30 3/25/1992 2529 716 --- 1813 ND<30 ND<O 30 ND<O 30 ND<O 30 ND<O 30 --- 6/25/1992 2529 805 --- 1724 ND<30 ND<O 30 ND<0 30 ND<O 30 ND<O 30 --- 12/8/1992 2529 737 --- 1792 ND<50 ND<O 5 ND<D 5 ND<0 5 ND<O 5 3/10/1993 2529 709 1820 ND<50 ND<O 5 ND<O 5 ND<0 5 ND<O 5 -- 6/16/1993 2529 721 1808 10/2211993 2529 744 1785 - 1/24/1994 2529 722 1807 ND<50 ND<O 5 ND<O 5 ND<0 5 ND<O 5 ND<5 0 -- 617/1994 2529 770 1759 ND<50 ND<O 5 ND<O 5 ND<O 5 ND<O 5 NDc5 0 34 K\W process\JS BP ARCO\111941Quarierty\3 QTR 03/11194 GW 1NR 3003 Page 8 of 11