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 Dale well Depth to Product 3roundwatet TPHg B T E X MTBE DO Number Sampled Elevation Water Thickness Elevation (pg1L) (pglL) (pg/L) (pglL) (pg1L) (pg1L) (mg/L) (Feet) (Feet) (Feet) (Feet) (Cont d) 6/25/1992 2633 733 1900 ND<30 ND<0 30 ND<0 30 ND<0 3o ND<0 30 - 12/8/1992 2633 591 - 2042 61 ND<0 5 N0<0 5 ND<0 5 ND<0 5 3/10/1993 2633 569 2064 220 35 06 57 92 - ^ 6/16/1993 2633 353 - 2280 ND<50 ND<0 5 ND<0 5 ND<0 5 ND<0 5 _ 10/22/1993 2633 606 - 2027 460 10 0 6 14 08 1600 QC-1 10/221t 993 - - — 460 09 07 1 4 08 1700 1/24/1994 2633 663 2070 ND<50 ND<0 5 ND<D 5 ND<0 5 06 209 6x7/1994 2633 608 — 2025 ND<50 ND<0 5 ND<0 5 ND<0 5 ND<0 5 ND<5 0 28 9/1311994 2633 636 -- 1997 ND<50 ND<0 5 ND<0 5 ND<0 5 ND<0 5 ND<5 0 512 1/10/1995 2633 554 2079 100 6 2 ND<0 5 t2 — 3/23/1995 2633 5 63 2070 ND<50 053 ND<0 50 051 19 89 10/4/1995 2633 637 1996 210 ND<l 0 N0<1 0 ND<1 0 ND<2 0 840 71 1/4/1996 2633 590 2043 3 900 N0<25 ND<25 ND<25 ND<50 12 000 30 3/29/1996 2633 659 - 19 74 9200 34 9 3 4 12 000 36 QC 1 3/29/1996 — - — 11,000 37 9 4 5 13 000 — 7/1/1996 2633 716 19 t7 5200 58 33 ND<l ND<t 10 000 31 10/1511996 2633 734 — 18 99 ND<250 ND<2 5 N0<5 0 ND<5 0 ND<5 0 14 000 40 4/16/1997 2633 5915 2035 180 ND<0 5 ND<l 0 ND<1 0 ND<l 0 57 42 10/15/1997 2633 608 2D 25 ND<50 ND<0 5 ND<1 0 ND<1 0 ND<l 0 120 54 QC 1 10/15/1997 — — - ND<50 ND<0 5 ND<1 0 ND<1 0 ND<l 0 120 3/17/1998 2633 557 - 2076 170 ND<0 5 ND<l 0 ND<l 0 ND<1 0 180 61 1/6/1999 2633 — 9/13/1999 2633 561 - 2072 480 35 73 ND<5 0 ND<5 0 99 000191 000 1/1912000 26 33 561 2072 800 11 ND<0 5 ND<0 5 1 2 84000 - 4/12/2000 2633 613 - 2020 1 600 42 ND<0 5 ND<0 5 ND<D 5 11000 7/22/2000 2633 698 2035 3 800 63 086 063 72 90000 — 10/26/2000 2633 501 - 21 32 1 100 09 ND<0 5 ND<0 5 069 3400 - t117/2001 2633 514 21 19 18 000 109 ND<5 0 ND<5 0 ND<5 0 28200 4/12!2001 2633 581 — 2052 700 ND<D 5 ND<0 5 ND<0 5 ND<1 5 946 - 5/23/2001 2633 581 2052 1 100 0 594 ND<0 5 ND<O 5 ND<l 5 1330 - 7/31/2001 2633 606 2027 1 600 203 ND<5 0 ND<5 0 ND<15 1490 10!30!2001 2633 612 — 2021 420 113 575 462 232 363 - • 1/29/2002 2633 557 = 2076 610 865 ND<0 5 ND<0 5 ND<l 0 780 _ 4/30!2002 2633 568 2065 2 600 394 ND<0 5 506 8 1 1 2140 7/30/2002 P 2633 491 2142 ND<500 ND<0 5 ND<0 5 ND<0 5 ND<l 0 586 10131/21)02 P 2633 576 2057 ND<50 27 1 3 ND<0 5 ND<0 5 13 — 1/30/2003 P 2633 576 — 2057 150 096 ND<0 5 ND<0 5 ND<0 5 79 4/30/2003 P 2633 562 - 2071 67 88 <05 <0 5 <0 5 290 7/3012003 P 2633 564 2069 480 62 13 27 15 65 1012912003 P 2633 603 — 20 30 <50 <05 <0 5 <0 6 <0 5 055 — 2/9/1987 - 9/21/1987 - 10/20/1987 - 11/20/1987 - — — — — — 3/13/1988 2521 473 - 2048 - 3/23/1988 2521 479 2042 6/7/1988 2521 490 20 31 — - — 10/8/1988 2521 545 1976 300 000 7000 9700 20000 4000 2/15/1990 2521 435 027 2106 - - -- - 4/26/1990 2521 473 005 2052 7/12/1990 2521 458 001 2064 — — 8/27/1990 2521 515 - 2006 - 1112/1990 2521 520 — 2001 11/5/1990 2521 520 2001 35 000 850 560 1900 5600 2/25/1991 2521 439 2082 9 800 11D 47 300 590 - 6/27/1991 2521 541 008 1986 36 000 210 71 690 2200 —9/25/1991 2521 615 042 19 38 - - -- - — 12/10/1991 2521 526 003 1997 3125M992 2521 420 001 2102 - — — 6/25!1992 2521 652 0 60 19 14 - - — 12/8/1992 2521 503 030 2041 3/10/1993 2521 429 SHEEN 2092 — — 6/16/1993 25 21 484 SHEEN 2037 - — 10/22/1993 2521 489 TRACE 2032 1/24/1994 2521 1270 — 1251 ND<50 ND<0 5 ND<0 5 ND<0 5 ND<0 5 157 6!7/1994 2521 1320 12 01 ND<50 ND<0 5 ND<0 5 ND<0 5 ND<0 5 - _ 9/13/1994 2521 11 60 1361 ND<50 33 ND<0 5 ND<0 5 19 ND<5 0 1/10/1995 2521 552 1969 240 9 4 12 38 3/23/1995 2521 4 12 -- 2109 ND<50 ND<o 50 ND<0 50 ND<0 50 ND<1 0 - 76 k MprocessV 5 SP ARC0111194kQuartertyl4 QTR 03/11194 GW MR 4003 Page 2 of i