ARCHIVED REPORTS_XR0008673 CASE 1

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! ! ! TABLE 1-SUMMARY OF RESULTS OF GROUNDWATER SAMPLING BP OIL COMPANY SERVICE STATION NO 11194 2375 TRACY BOULEVARD,TRACY,CALIFORNIA ALISTO PROJECT NO 10.085 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) (ug1A) (UgA) (UgA) (UgA) (UgA) (UgA) (ppm) MONITORING (Feet) (Feet) (Feet) (Feet) MW-1 02/15/90 2688 595 --- 2093 ND<50 ND<O 3 ND<0 3 ND<O 3 ND<O 3 — — SUP MW-1 04/26/90 2688 608 — 2080 MW-1 07/12/90 2688 611 — 2077 ND<50 ND<0 3 ND<0 3 ND<O 3 ND<O 3 - — SUP MW-1 08/27/90 2688 545 — 2143 MW-1 11/02190 2688 651 — 2037 MW-1 11/05/90 2688 653 2035 ND<50 ND<0 3 ND<0 3 ND<0 3 ND<O 3 — — SUP MW 1 02/25/91 2688 575 — 2113 ND<50 ND<O 3 ND<O 3 ND<0 3 ND<O 3 — - SUP MW-1 06/27/91 2688 666 2022 ND<50 ND<O 5 ND<0 5 ND<0 5 ND<O 5 --- CHR MW-1 09/25/91 2688 704 — 1984 ND<30 NM 30 ND<0 30 ND<0 30 ND<0 30 -- _ SEQ MW-1 12/10191 2688 646 -- 2042 ND<30 ND<0 30 ND<0 30 ND<O 30 ND<0 30 --- — SEQ MW-1 03/ 02 2688 595 — 2093 ND<30 ND<0 30 ND<O 30 ND<O 30 NM 30 — SEQ MW-1 06125192 2686 802 — 1886 ND<30 ND<O 30 ND<O 30 ND<O 30 ND<0 30 — -- SEQ MW-1 12/08192 2688 644 — 2044 ND<50 ND<0 5 ND<0 5 ND<O 5 ND<0 5 -- --- ANA MW-1 03/10/93 2688 601 -- 2087 ND<50 ND<O 5 ND<0 5 ND<O 5 ND<O 5 -- PACE MW-1 06/16/93 2688 567 — 2121 -- — — — — — MW 1 10/22/93 2688 649 — 2039 — MW-1 01/24/94 2688 638 — 2050 --- MW-1 06/07/34 2688 684 — 2004 ND<50 ND<0 5 ND<0 5 ND<O 5 ND<O 5 34 PACE MW-1 09/13/94 2688 713 - 1975 -- -_ --- MW-1 01/10195 2688 593 - 2095 -- _ ___ — _ — MW-1 03/23/95 2688 568 — 2120 ND<50 ND<O 50 ND<O 50 ND<O 50 ND<10 — 97 ATI MW-1 10/04/95 2688 696 --- 1992 — MW-1 01/04/96 2688 624 2064 — MW-1 03129/96 2688 605 — 2083 ND<50 ND<O 5 ND MW 1 07/01/96 2688 661 -- 2027 MW-1 1515/96 2688 680 - 2008 MW-1 04/16/97 2688 540 — 2148 — MW-1 10/15197 2688 675 -- 2013 — MW-1 03/17/98 2688 634 — 2054 -- 17-Anr-QR Panq 1