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) (ug/A) (UgA) (ugA) 00 (UgA) (UgA) (ppm) MONITORING (Feet) (Feet) (Feet) (Feet) AMW-5 12/10/91 2619 595 — 2024 ND<30 ND<O 30 ND<O 30 ND<O 30 ND<O 30 --- — SEQ AMW-5 03/25/92 2619 539 — 2080 72 48 ND<O 30 ND<O 30 ND<O 30 — — SEQ AMW-5 06/25/92 2619 727 - 1892 ND<30 ND<O 30 ND<O 30 ND<0 30 ND<O 30 — — SEQ AMW 5 1&O8/92 2619 578 — 2041 56 (d) ND<0 5 ND<0 5 ND<O 5 ND<O 5 --- — ANA AMW-0 03/10193 2619 550 — 2069 ND<50 32 06 20 51 -- — PACE AMW-5 06/16193 2619 376 --- 2243 ND<50 ND<O 5 ND<0 5 ND<O 5 ND<0 5 — --- PACE AMW 5 10/22/93 2619 593 --- 2026 300 ND<O 5 ND<O 5 ND<O 5 ND<0 5 840 (c) — PACE AMW 5 01/24/94 2619 555 — 2064 ND<50 ND<O 5 ND<0 5 ND<O 5 ND<0 5 45 (c) --- PACE AMW-5 06/07/94 2619 601 — 2018 ND<50 ND<O 5 ND<O 5 ND<O 5 ND<0 5 — 37 PACE AMW-0 09/13/94 26 19 633 — 1986 ND<50 ND<O 5 ND<O 5 ND<O 5 ND<0 5 — 73 PACE AMW-5 000/95 2619 541 — 2078 NN50 5 2 ND<0 5 2 --- 51 ATI AMW-5 03/23!95 2619 542 — 2077 ND<50 16 ND<O 50 079 16 — 93 ATI AMW-5 10/04/95 2619 630 — 1989 210 ND<10 ND<10 ND<10 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<50 1300 19 ATI QC-1 (d) 01/04/96 — -- — --- 370 ND<2 5 ND<2 5 ND<2 5 ND<50 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 2014 170 ND<0 5 ND<1 ND QC-1 (d) 07/01/96 --- — -- -- 170 ND<0 5 ND<1 ND<1 ND AMW-5 10/15!96 2619 627 -- 1992 ND<250 10 ND<50 ND<50 ND<5 0 27000 64 SPL AMW-5 04/16/97 2619 484 2135 --- -- -- — — — AMW-5 — AMW-5 10/15/97 2619 604 — 2015 --- AMW 5 03/17/98 2619 560 — 2059 --- — -- — — 17-Apr 98 Page 13