ARCHIVED REPORTS_XR0008672 CASE 1

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TABLE 1 SUMMARY OF RESULTSOF GROUNDWATER MONITORING WELL DATE OF CASING DEPTH TO PRODUCT GROUNDWATER TPH G B T E X MTBE DO LAS ID SAMPLING/ ELEVATION (a) WATER THICKNESS ELEVATION (b) (ug//I) (ug/1) (ug/1) (ug/1) (ug/1) (ug/1) (ppm) MONITORING (Feet) (Feet) (Feet) (Feet) AMW-4 01/06/99 2536 483 --- 2053 --- --- -- --_ AMW-5 12/10/91 2619 595 --- 2024 ND<30 ND<O 30 ND<0 30 ND<0 30 ND<O 30 --- --- SEQ AMW-5 03/25/92 26 19 539 2080 72 48 ND<0 30 ND<O 30 ND<O 30 --- — SEQ AMW-5 06/25/92 26 19 727 --- 1892 ND<30 ND<O 30 ND<O 30 ND<O 30 ND<O 30 - --- SEQ AMW-5 12/08/92 26 19 578 2041 56 (d) ND<O 5 ND<O 5 ND<O 5 ND<0 5 — - ANA AMW-5 03/10/93 2619 550 --- 2069 ND<50 32 06 20 51 — - PACE AMW 5 06/16193 2619 376 --- 2243 ND<50 ND<O 5 ND<O 5 ND<O 5 ND<0 5 --- PACE AMW 5 10/22/93 2619 593 20 26 300 ND<O 5 ND<O 5 ND<O 5 ND<O 5 840 (c) -- PACE AMW 5 01/24/94 2619 555 2064 ND<50 ND<O 5 ND<O 5 ND<O 5 ND<O 5 45 (c) --- PACE AMW-5 06107/94 2619 601 20 18 ND<50 ND<O 5 ND<O 5 ND<O 5 ND<O 5 --- 37 PACE AMW-5 09/13/94 2619 633 1986 ND<50 ND<O 5 ND<O 5 ND<O 5 ND<0 5 73 PACE AMW-5 01/10/95 2619 541 2078 ND<50 5 2 ND<O 5 2 51 ATI AMW 5 03/23/95 2619 542 -- 2077 ND<50 15 ND<O 50 079 16 --- 93 ATI AMW-5 10104/95 2619 630 1989 210 ND<1 0 ND<1 0 ND<1 0 ND<2 0 840 64 ATI AMW-5 01/04/96 2619 571 --- 2048 360 ND<2 5 ND<2 5 ND<2 5 ND<5 0 1300 19 ATI QC-1 (d) 01/04/96 --- --- -- -- 370 ND<2 5 ND<2 5 ND<2 5 ND<5 0 1300 --- ATI AMW 5 03/29/96 2619 550 2069 9400 25 6 14 4 12000 30 SPL AMW-5 07/01/96 2619 605 20 14 170 ND<O 5 ND<1 ND<1 ND<1 220 52 SPL QC-1 (d) 07/01/96 --- --- - 170 ND<O 5 ND<1 ND<1 ND<1 230 -- SPL AMW-5 10/15/96 2619 627 1992 ND<250 10 ND<5 0 ND<5 0 ND<5 0 27000 64 SPL AMW 5 04/16/97 2619 484 21 35 -- — --- --- --- AMW-5 —AMW-5 10/15/97 26 19 604 20 15 --- -_- AMW-5 03117/98 2619 560 2059 --- --- --- AMW 5 01/06/99 2619 579 2040 - AMW-6 12110/91 2668 585 2083 ND<30 ND<O 30 ND<0 30 ND<O 30 ND<0 30 --- --- SEQ AMW-6 03/25/92 2668 486 21 82 97 43 ND<0 30 74 61 --- - SEQ AMW-6 06/25/92 2668 700 1968 ND<30 ND<O 30 ND<0 30 ND<0 30 ND<O 30 -- SEQ AMW-6 12/08/92 2668 582 2086 ND<50 ND<O 5 ND<O 5 ND<0 5 ND<O 5 --- -- ANA AMW 6 03/10/93 2668 547 --- 21 21 ND<50 ND<O 5 ND<O 5 ND<0 5 ND<0 5 — --- PACE AMW-6 06/16/93 2668 348 2320 ND<50 ND<O 5 ND<O 5 ND<O 5 ND<0 5 --- --- PACE AMW-6 10/22/93 2668 590 - 20 78 ND<50 ND<O 5 ND<O 5 ND<O 5 ND<0 5 --- --- PACE AMW-6 01/24/94 2668 578 -- 2090 ND<50 ND<O 5 ND<O 5 ND<O 5 ND<0 5 — --- PACE QC-1 (d) 01/24/94 --- --- --- ND<50 ND<O 5 ND<O 5 ND<O 5 ND<O 5 --- --- PACE AMW-6 06/07/94 2668 623 2045 ND<50 ND<O 5 ND<O 5 ND<O 5 ND<O 5 --- 34 PACE AMW-6 09113/94 2668 639 2029 ND<50 ND<0 5 ND<O 5 ND<O 5 ND<O 5 --- 82 PACE AMW 6 01/10/95 2668 540 2128 ND<50 1 ND<O 5 3 2 --- 64 ATI AMW 6 03123/95 2668 550 --- 2118 ND<50 ND<0 50 ND<0 50 ND<0 50 ND<1 0 - 84 ATI Blaine Tech Services Inc Report 990106-P-3 BP Oil 11194 at 2375 Tracy Blvd Tracy California Page 11