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^aroundwatei TPHg B T E X MtBE DO Number Sampled Elevation Water Thickness Elevation (ugIL) (pg/L) (p91L) WWI-) WWI-) (pglL) (mglL) (Feel) (Feet) (Feet) (Feet) (Cont d) 9/13/1999 2590 562 20 28 2 400 42 65 89 21 330 — 1/19/2000 2590 515 2075 5200 72 ND<O 5 93 37 29 4/12/2000 2590 580 2010 8300 71 55 200 61 55 — 7/22/2000 2590 567 — 2023 2900 81 28 63 19 46 — 10/26/2000 2590 520 2070 2000 16 ND<O 5 27 24 23 1/17/2001 25 90 535 2055 820 949 135 587 135 401 4/12/2001 2590 535 20 55 1600 14 556 786 11 3 556 — 5/23/2001 2690 551 2039 2700 135 539 775 281 471 7/31/2001 2590 585 — 2005 1400 83 108 228 11 105 10/30/2001 2590 605 — 19 85 390 406 193 0 526 ND<l 5 253 1/29/2002 25,30 4 9B — 2092 720 454 2.92 396 ND<1 0 39 — 4/30/2002 2590 522 2068 2 100 411 374 329 ND<5 0 105 7/30/2002 P 2590 559 — 2031 1 100 108 1 19 335 621 395 10/31/2002 P 2590 550 — 2040 1 900 42 36 76 10 10 — 1/30/2003 P 2590 531 2059 600 1 4 <0 5 27 086 32 — 4/30/2003 P 2590 515 — 2075 1 200 0 841 <0 5 93 36 41 7/3 012 0 0 3 P 2590 580 2010 260 <1 2 <1 2 <1 2 <1 2 49 — 10/2912003 P 2590 563 — 2027 1,300 3 4 J <1 0 551 <1 0 79 J 9/21/1987 — _ — — 18000 790 14 2200 — — 10/20/1987 — — 34 000 50 ND<O 5 1200 — 11/20/1987 — — — 8 700 210 6600 — 230 — 3113/1988 2545 473 — 2072 — — — — _ 3/23/1988 2545 479 — 2066 6200 420 5 600 — 67/1968 2545 4 85 2060 -- --- — — — — 10/18/1988 2545 545 2000 1 300 34 09 1 170 2/15/1990 2545 445 — 2100 1 900 220 21 330 250 — 4/26l1990 2545 465 2080 — - --- - -- 7/12/1990 2545 472 — 2073 4 400 140 94 130 300 — 8/27/1990 2545 515 — 2030 — — -- — _ — . 11/2/1990 2,545 520 — 2095 -- 5 - — = 11/5/1990 2545 521 2024 7 500 430 55 760 1600 2/25/1991 2545 429 21 16 2 400 160 59 120 96 6/27/1991 2545 534 -- 2011 ND<50 67 ND<O 5 ND<O 5 ND<0 5 9/25/1991 2545 574 — 1971 1 800 120 39 79 94 — 12/10/1991 2545 510 2035 720 46 34 38 58 — 3/25/1992 2545 432 — 21 13 550 75 033 40 32 6/25/1992 2545 - — — -- - -- — 12/8/1992 2545 1162 1383 — — — 3/10/1993 2545 1211 1334 ND<50 1\10<0 5 NO<0 5 ND<O 5 ND<O 5 — 6/16/1993 2545 1013 1532 73 22 2 1 39 57 — 10/22/1993 2545 499 — 2046 ND<50 ND<0 5 ND<O 5 ND<O 5 ND<O 5 ND<5 0 1/24/1994 2545 891 1654 120 11 06 26 26 ND<5 O — 6n1l994 2545 6 38 1907 ND<50 ND<O 5 ND<O 5 ND<O 5 ND<O 5 NO<5 0 9/13/1994 2545 599 1946 ND<50 ND<O 5 NO<O 5 ND<O 5 ND<O 5 ND<5 0 — 1/10/1995 2545 435 — 21 10 ND<50 ND<0 5 ND<O 5 ND<0 5 ND<l — — 3/23/1995 2545 419 — 2126 910 23 30 68 65 — 79 O0-1 3/23/1995 -» — - 620 20 25 55 53 - 10/4/1995 2545 541 — 2004 NO<50 22 ND<O 50 069 ND<l 0 78 69 1/4/1996 2545 462 — 2083 130 46 1 1 45 37 87 26 3/29/1996 2545 445 — 2100 490 27 ND<l 20 12 13 27 7/1/1996 2545 501 — 2044 580 35 5 30 13 11 37 10/15/1996 2545 523 — 2022 380 39 12 86 t24 34 55 4/16/1997 2545 390 21 55 — -- -- --- — — — 10/15/1997 2545 508 -- 2037 3/17/1998 2545 470 2075 — —1/611999 2545 491 - 2054 - - - — - — 1/19/2000 2545 465 — 2080 — — 4/12/2000 2545 560 1985 7/22/2000 2545 499 2046 — — 10/26/2000 2545 457 -- 2088 — — — — — 1/17/2001 2545 515 2030 - 4/12/2001 2545 483 2062 5/2312001 2545 4 85 -- 2060 120 0 653 ND<O 5 ND<0 5 ND<l 5 619 7131/2001 2545 512 — 2033 340 121 ND<O 5 0 527 ND<1 5 463 10/30/2001 2545 497 2048 390 424 ND<O 5 215 ND<1 5 50 9 1/29/2002 2645 446 2099 N13<50 ND<O 5 ND<O 5 ND<O 5 ND<1 0 493 — 4/30/2002 2545 475 -- 2070 100 ND<O 5 ND<O 5 ND<O 5 ND<l 0 3 B3 7/30/2002 P 2545 492 2053 600 232 ND<2 5 429 ND<5 579 10/31/2002 P 2545 500 -- 2045 81 1 7 ND<O 5 ND<O 5 ND<O 5 13 k 1WprocessV5 BP ARCO\111941Quarterl/\4 QTR 03\11194 GW MR 4003 Page 4 of 11