ARCHIVED REPORTS_XR0008658 CASE 1

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TABLE 1 -SUMMARY 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) (uglll) (ug/0 (ugll) (ug/1) (ug/1) (ug1l) (ppm) MONITORING (Feet) (Feet) (Feet) (Feet) AMW-4 08/10/90 2536 483 — 2053 ND<50 06 07 29 42 -- SUP AMW4 08/27/90 2536 483 --- 2053 — — --- —_ — AMW-4 11/02/90 2536 489 — 2047 — — -- — — — — AMW-4 11/05/90 2536 488 — 2048 ND<50 03 ND<O 3 ND<0 3 ND<O 3 — --- SUP AMW-4 02/25/91 2536 408 — 2128 ND<50 ND<O 3 ND<O 3 ND<O 3 ND<O 3 — — SUP AMW-4 06/27/91 2536 501 — 2035 ND<50 ND<O 5 ND<0 5 ND<0 5 ND<O 5 -- — CHR AMW-4 09/25/91 2536 545 — 1991 ND<30 ND<0 30 ND<0 30 ND<O 30 ND<O 30 — --- SEQ AMW-4 12/10/91 2536 479 — 2057 ND<30 ND<O 30 ND<O 30 ND<O 30 ND<O 30 — --- SEQ AMW-4 03/25/91 2536 426 — 2110 ND<30 ND<O 30 ND<O 30 ND<O 30 ND<O 30 — --- SEQ AMW-4 06125/92 2536 616 — 1920 ND<30 ND<O 30 ND<O 30 ND<O 30 ND<O 30 -- — SEQ AMW-4 12/08/92 2536 474 -- 2062 ND<50 ND<O 5 ND<0 5 ND<O 5 ND<O 5 -- — ANA AMW4 03/10/93 2536 428 — 2108 ND<50 ND<0 5 ND<0 5 ND<O 5 ND<0 5 -- PACE AMW-4 06116/93 2536 406 — 21 30 ND<50 ND<O 5 ND<O 5 ND<0 5 ND<0 5 — --- PACE AMW-4 10/22/93 2536 485 — 2051 ND<50 ND<O 5 ND<O 5 ND<0 5 ND<0 5 — -- PACE AMW-4 01/24/94 2536 481 — 2055 ND<50 ND<0 5 ND<O 5 ND<0 5 ND<0 5 — --- PACE AMW-4 06/07/94 2536 530 — 2006 ND<50 ND<0 5 ND<O 5 ND<O 5 ND<0 5 — 34 PACE AMW-4 09/13194 2536 559 — 1977 ND<50 ND<O 5 ND<0 5 ND<0 5 ND<O 5 - 69 PACE AMW-4 01/10/95 2536 422 — 2114 ND<50 ND<O 5 ND<O 5 ND<0 5 ND<1 — 71 ATI AMW-4 03/23/95 2536 398 --- 21 38 ND<50 ND<O 50 ND<O 50 ND<O 50 ND<1 0 — 79 ATI AMW-4 10/04/95 2536 532 — 2004 ND<50 ND<0 50 ND<O 50 ND<O 50 ND<1 0 ND<5 0 59 ATI AMW-4 01/04196 2536 448 — 2088 ND<50 ND<0 50 ND<O 50 ND<0 50 ND<1 0 ND<5 0 10 ATI AMW-4 03/29/96 2536 432 — 2104 ND<50 ND<O 5 ND<1 ND<1 ND<1 ND<10 37 SPL AMW-4 07/01/96 2536 488 — 2048 ND<50 ND<0 5 ND<1 ND<1 ND<1 ND<10 61 SPL AMW-4 10/15/96 2536 509 — 2027 ND<50 ND<0 5 ND<1 0 ND<1 0 ND<1 0 ND<10 75 SPL AMW-4 04/16/97 2536 367 — 2169 --- — — — __ _ — — AMW-4 10/15/97 2536 512 — 2024 — AMW-4 03/17198 2536 471 -- 2065 --- --- — — AMW-4 01/06/99 2536 483 — 2053 — -- --- — AMW-4 09/13/99 2536 513 --- 2023 — --- -- — AMW-4 01/19/00 2536 455 — 2081 — — --- — AMW-4 04/12/00 2536 440 --- 2096 — --- — — AMW-4 07/22/00 2536 607 — 2029 --- AMW-4 10/26/00 2536 468 — 2068 -- --- — — _ — — Blaine Tech Servrces Inc,Report,001026-S-2 SP Oil 11194 at 2375 Tracy Blvd Tracy,California Page 20