ARCHIVED REPORTS_XR0008105 CASE 1

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i TABLE 1 -IUMMARY OF RESULTS OF GROUNDWATER MONITORING 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) (ug1R) (ug/L) (ug/L) (ug/L) (ug/L) (ug/L) (ppm) MONITORING (Feet) (Feet) (Feet) (Feet) AMW-2 04/26/90 2645 494 — 2151 ND<50 ND<0 3 ND<0 3 ND<0 3 ND<O 3 — — ANA AMW-2 07112/90 2645 521 --- 2124 ND<50 ND<0 3 ND<O 3 ND<0 3 ND<O 3 --- --- SUP AMW-2 08/27/90 2645 546 — 2099 — -- — -- — — — — AM W-2 11/02/90 2645 547 — 2098 --- — — — -- -- — — AMW-2 11/05/90 2645 549 — 2096 ND<50 ND<O 3 ND<O 3 ND<O 3 ND<O 3 — — SUP AMW-2 02/25/91 2645 456 --- 2189 ND<50 ND<O 3 ND<O 3 ND<O 3 ND<O 3 — — SUP AMW-2 06/27/91 2645 560 — 2086 ND<50 ND<O 5 ND<0 5 ND<0 5 ND<0 5 — — CHR AMW-2 09/25/91 2645 607 — 2038 ND<30 ND<O 30 ND<O 30 ND<O 30 ND<0 30 — — SEQ AMW-2 12/10/91 2645 534 --- 2111 ND<30 ND<O 30 ND<O 30 ND<O 30 ND<O 30 -- — SEQ AMW-2 03/25/91 2645 470 — 2175 ND<30 ND<O 30 ND<O 30 ND<O 30 ND<O 30 -- -- SEQ AMW-2 06/25/92 2645 684 --- 1961 ND<30 ND<O 30 ND<0 30 ND<0 30 ND<O 30 SEQ AMW-2 12/08/92 2645 528 — 2117 ND<50 ND<O 5 ND<0 5 ND<O 5 ND<0 5 -- — ANA AMW-2 03/10/93 2645 468 --- 21 77 ND<50 ND<0 5 ND<0 5 ND<O 5 ND<O 5 — (1) --- PACE AMW-2 06/16/93 2645 489 -- 2156 -- -- — -- --- -- — AMW-2 10/22/93 2645 538 -- 21 07 --- -- — — — — — — AMW-2 01/24/94 2645 506 -- 2139 -- -- — -- — — — — AMW-2 06/07/94 2645 551 - 2094 ND<50 ND<0 5 ND<0 5 ND<O 5 ND<0 5 ND<5 0 (1) 35 PACE AMW-2 09/13/94 2645 616 — 2029 -- — — -- — — — — AMW-2 01/10/95 2645 472 - 21 73 --- -- -- — -- — — — AMW-2 03/23/95 2645 440 — 2205 62 ND<0 50 ND<0 50 ND<O 50 ND<1 0 — 97 ATI AMW-2 10/04/95 2645 592 2053 --- -- — -- — — -- — AMW-2 01/04/96 2645 490 — 2155 -- -- - -- — — — — AMW-2 03/29/96 2646 473 — 2172 ND<50 ND<O 5 ND<1 ND<1 ND<1 ND<10 32 SPL AMW-2 07101/96 2645 528 -- 2117 --- --- -- — — — — — AMW-2 10/15/96 2645 549 — 2096 -- AMW-2 04/16/97 2645 413 - 2232 --- — — -- — — — — AMW-2 10/15197 2645 567 -- 2078 — — -- -- — -- AMW-2 03/17/98 2645 523 -- 2122 -- -- — -- — — - — AMW-2 01/06/99 2645 523 --- 2122 -- — -- -- — — — — AMW-2 09113199 2645 519 --- 2126 — -- — -- — — — --- AMW-2 01/19/00 2645 489 -- 2156 -- — -- --- -- -- -- -- AMW-2 04/12/00 2645 509 — 21 36 AMW-2 07/22/00 2645 549 — 2096 --- — — -- — -- — — AMW-2 10/26/00 2645 535 --- 2110 — -- -- -- --- --- --- --- AMW-2 01/17/01 2645 540 --- 2105 — -- -- -- - AMW-2 04/12/01 2645 515 — 21 30 - — — -- — -- — -- AMW-2 05/23/01 2645 531 — 2114 ND<50 ND<O 5 ND<O 5 ND<O 5 ND<1 5 ND<0 5 — PACE AMW-2 07/31/01 2645 557 --- 2088 ND<50 ND<O 5 ND<O 5 ND<O 5 ND<1 5 ND<O 5 — PACE AMW-2 10/30/01 2645 548 — 2097 ND<50 ND<O 5 ND<0 5 ND<O 5 ND<1 5 ND<O 5 — PACE Blame Tech Services Inc, Report 011030-C-1,BP Oil 11194 at 2375 Tracy Blvd,Tracy,California Page 18