ARCHIVED REPORTS_XR0008111 CASE 1

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TABLE i -SUMMARY OF RESULTS OF GROUNDWATER MONITORING r WELL DATE OF CASING DEPTH TO PRODUCT GROUNDWATER TPH-G B T E X MTBE DO LAB ID SAMPLING/ ELEVATION (a) WATER THICKNESS ELEVATION (b) (ug/1q (ug/1) (ug/1) (ugll) (ug/0 (ug/1) (ppm) MONITORING (Feet) (Feet) (Feet) (Feet) MW-1 02/09187 --- --- - --- ND<50 ND<O 5 ND<0 5 --- ND<0 5 --- — SUP MW-1 09/21/87 --- — --- --- ND<50 ND<O 5 ND<0 5 --- ND<0 5 --- SUP MW-1 10/20/87 -- -- --- -- ND<50 ND<O 5 ND<0 5 - ND<0 5 — --- SUP MW-1 11/20/87 --- --- -- --- ND<50 ND<O 5 ND<0 5 --- ND<0 5 --- --- SUP MW-1 03/13/88 2688 588 - 21 00 --- --- --- MW-1 03/23/88 2688 588 --- 21 00 ND<50 ND<O 5 ND<0 5 --- ND<0 5 __ _-- SUP MWA 06/07/88 21111 515 --- 1193 --- _-_ MW-1 10/18/88 2688 625 --- 2063 ND<50 ND<0 5 ND<0 5 ND<O 5 ND<0 5 --- --- SUP MW-1 02/15/90 2688 595 -- 2093 ND<50 ND<O 3 ND<0 3 ND<O 3 ND<0 3 --- --- SUP MW-1 04126/90 2688 608 — 2080 -- -- --- --- MW-1 07112/90 2688 611 — 2077 ND<50 ND<0 3 ND<O 3 ND<O 3 ND<0 3 — --- SUP MWA 08/27/90 2688 545 - 2143 --- --- MW-1 11/02/90 2688 651 --- 2037 ___ ___ MW-1 11105/90 2688 653 --- 2035 ND<50 ND<0 3 ND<O 3 ND<O 3 ND<0 3 --- - SUP MW-1 02/25/91 2688 575 — 21 13 ND<50 ND<0 3 ND<O 3 ND<O 3 ND<0 3 --- - SUP MW-1 06/27/91 2688 666 - 2022 ND<50 ND<0 5 ND<0 5 ND<O 5 ND<0 5 - -- CHR MW-1 09125/91 2688 704 — 119134 ND<30 ND<0 30 ND<O 30 ND<O 30 ND<0 30 --- SEQ MW-1 12/10/91 2688 646 - 2042 ND<30 ND<0 30 ND<O 30 ND<O 30 ND<0 30 --- SEQ MW-1 03/25/92 2688 595 - 2093 ND<30 ND<0 30 ND<O 30 ND<O 30 ND<0 30 --- -- SEQ MW-1 06/25/92 2688 802 - 1886 ND<30 ND<0 30 ND<O 30 ND<O 30 ND<0 30 --- SEQ MW-1 12/08/92 2688 644 - 2044 ND<50 ND<0 5 ND<O 5 ND<O 5 ND<0 5 --- -_ ANA MW-1 03/10/93 2688 601 — 2087 ND<50 ND<0 5 ND<0 5 ND<O 5 ND<0 5 --- --- PACE MW-1 06/16193 2688 567 — 2121 MW-1 10/22/93 2688 649 --- 2039 -- -- ___ ___ MW-1 01/24/94 2688 638 2050 MW-1 06/07/94 2688 684 — 2004 ND<50 ND<0 5 ND<0 5 ND<O 5 ND<0 5 --- 34 PACE MW-1 09/13/94 2688 713 --- 1975 -- __ _ _-- ___ --- MW-1 01/10/95 2688 593 -- 2095 --- --- MW-1 03/23/95 2688 568 -- 21 20 ND<50 ND<0 50 ND<O 50 ND<O 50 ND<1 0 --- 97 ATI MW-1 10/04/95 2688 696 — 1992 --- --- MW-1 01/04/96 2688 624 — 2064 -- --- --- ___ -__ _-_ MW-1 03/29/96 2688 605 2083 ND<50 ND<0 5 ND<1 ND<1 ND<1 ND<10 38 SPL MW-1 07/01/96 2688 661 2027 -- --- ___ MW-1 10/15/96 2688 680 2008 MW-1 04/16/97 2688 540 — 21 48 MWA 10/15/97 2688 675 — 2013 — — -- --_ ___ MW-1 03/17/98 2688 634 --- 2054 MW-1 01/06/99 2688 652 -- 2036 - --- --- MWA 09113199 2688 587 --- 2101 -- -- --- ___ Blame Tech Services, Inc Report 010117-X-2 BP Oil 11194 at 2375 Tracy Blvd Tracy California Page 1