ARCHIVED REPORTS_XR0008097 CASE 1

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Table 1 Page 8 of 11 a 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 (µyL) (µglL) (WYL) (µg/L) (µyt_) (pg/L) (ppm) (Feet) (Feet) (Feet) (Feet) I 7/12/1990 2645 521 --- 2124 ND<50 ND<O 3 ND<O 3 ND<O 3 ND<O 3 8/27/1990 2645 546 2099 --- --- --- 11/2/1990 2645 547 --- 2098 --- --- --- — 11/5/1990 2645 549 2096 ND<50 ND<O 3 ND<0 3 ND<O 3 ND<O 3 2!2511991 2645 456 --- 2189 ND<50 ND<O 3 ND<O 3 ND<O 3 ND<O 3 6/27/1991 2645 560 --- 2085 ND<50 ND<O 5 ND<O 5 ND<0 5 ND<O 5 _- 9/25/1991 2645 607 2038 ND<30 ND<0 30 ND<O 30 ND<O 30 ND<O 30 12/10/1991 2645 534 --- 21 11 ND<30 ND<0 30 ND<O 30 ND<0 30 ND<O 30 — 3/25/1991 2645 470 --- 2175 ND<3o ND<0 30 ND<0 30 ND<O 30 ND<O 30 6/25/1992 2645 $84 1961 ND<30 ND<Q 30 ND<O 30 ND<O 30 ND<O 30 -- 1218/1992 2645 528 21 17 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<0 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 --- --- 6t7/1994 2645 551 2094 ND<50 ND<O 5 ND<O 5 ND<O 5 ND<0 5 ND<5 0 35 9/1311994 2645 616 --- 2029 --- --- --- 1/10/1995 2645 472 --- 2173 --- --- --- — 3/23/1995 2645 440 2205 62 ND<O 5o ND<0 50 ND<0 50 ND<1 0 97 10/4/1995 2645 592 --- 2053 -- --- --- --- - 1/411996 2645 490 --- 2155 --- --- -- 3/29/1996 2645 473 2172 ND<50 ND<O 5 ND 7/1/1996 2645 528 --- 21 17 --- - — 10/15/1996 2645 549 2096 --- --- -- 4/16/1997 2645 413 2232 --- --- 10/15/1997 2645 567 --- 2078 — 3/1711998 2645 523 — 21 22 --- --- --- 1/6/1999 2645 523 2122 9/13/1999 2645 519 2126 --- --- 1/19/2000 2645 489 - 2156 - - 4/12/2000 2645 509 21 36 7/22/2000 2645 549 2095 10/26/2000 2645 535 2110 --- --- -- 1/17/2001 2645 540 2105 - --- 4/12/2001 2645 S15 - 2130 - 5/23/2001 2645 531 2114 ND<50 ND<O 5 ND<O 5 ND<O 5 ND<1 5 ND<O 5 -- 7/31/2001 2645 557 2088 ND<50 ND<0 5 ND<O 5 ND<O 5 ND<1 5 ND<O 5 10/30/2001 2645 $46 2097 ND<50 ND<O 5 ND<0 5 ND<O 5 ND<1 5 ND<O 5 1/29/2002 2645 477 --- 21 68 ND<50 ND<O 5 ND<O 5 ND<O 5 ND<1 0 ND<0 5 4/30/2002 2645 513 21 32 ND<50 ND<O 5 ND<O 5 ND<O 5 ND<1 0 ND<O 5 7/30/2002 P 2645 545 --- 21 00 ND<50 ND<0 5 ND<O 5 ND<O 5 ND<1 0 ND<O 5 10/31/2002 P 2645 543 21 02 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<O 5 ND<O 5 ND<O 5 ND<O 5 -- 0=2003 P 2645 491 2154 <50 <05 <05 <05 <05 <25 - 8/27/1990 2529 746 --- 1763 --- -- -- Ii/V1990 2529 -- --- --- --- 11/511990 2529 75B --- 1771 ND<50 ND<0 3 ND<O 3 ND<0 3 ND<0 3 2/25/1991 2529 703 --- 1826 ND<50 ND<0 3 ND<O 3 ND<O 3 ND<O 3 6/27/1991 2529 760 --- 1769 ND<50 ND<O 5 ND<O 5 ND<O 5 ND<O 5 9/25/1991 2529 792 --- 1737 ND<30 ND<O 30 ND<O 30 ND<0 30 ND<O 30 12/10/1991 2529 756 --- 1773 ND<30 ND<0 30 ND<0 30 ND<O 30 ND<O 30 3/2511992 2529 716 --- 1813 ND<30 ND<0 30 ND<O 30 ND<O 30 ND<O 30 --- 6/25/1992 2529 805 --- 1724 ND<30 ND<O 30 ND<O 30 ND<0 30 ND<O 30 1218/1992 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<Q 5 ND<O 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<O 5 ND<O 5 ND<O 5 ND<5 0 -- 6/7/1994 2529 770 1759 ND<50 ND<0 5 ND<O 5 ND<O 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 ND<50 ND<O 50 ND<O 50 ND<0 50 ND<1 0 93 10/4/1995 2529 759 --- 1770 --- 1/411996 2529 710 --- 1819 -- 18 19 _-_ - D — 3/29/1996 2529 697 1832 ND<50 ND<0 5 ND<1 ND 0 7/111996 2529 753 1776 10/15/1996 2529 775 --- 1754 4116/1997 2529 635 -- 1894 - K 1W processlJ5 BP ARCO1111941QuarterW QTR 03/11194 GW MR 2003