ARCHIVED REPORTS_XR0008111 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) (ug/11) (ug/1) (ug1l) (ug/1) (ugll) (ug/1) (ppm) MONITORING (Feet) (Feet) (Feet) (Feet) AMW-4 08/10/90 2536 483 --- 2053 ND<50 06 07 29 42 --- SUP AMW-4 08/27/90 2536 483 – 2053 --- -- --- --- --- --- --- --- -- 20 47 AMW-4 11/02/90 2536 489 -- -- --- --- --- --- AMW4 11/05/90 2536 488 --- 2048 ND<50 03 ND<0 3 ND<O 3 ND<O 3 - SUP AMW-4 02125!91 2536 40B – 21 28 ND<50 ND<O 3 ND<0 3 ND<O 3 ND<O 3 --- SUP AMW-4 06/27191 2536 501 2035 ND<50 ND<O 5 ND<O 5 ND<O 5 ND<O 5 – -- CHR AMW-4 09/25/91 2536 545 --- 1991 ND<30 ND<O 30 ND<O 30 ND<O 30 ND<0 30 --- – SEQ AMW-4 12!10191 2536 479 - 2057 ND<30 ND<O 30 ND<O 30 ND<O 30 ND<0 30 --- --- SEQ AMW-4 03/25/91 2536 426 --- 21 10 ND<30 ND<O 30 ND<O 30 ND<0 30 ND<O 30 – --- SEQ AMW4 06/25/92 2536 616 1920 ND<30 ND<0 30 ND<0 30 ND<O 30 ND<O 30 – --- SEQ AMW-4 12108192 2536 474 — 2062 ND<50 ND<O 5 ND<O 5 ND<O 5 ND<O 5 -- --- ANA AMW-4 03110!93 2536 428 --- 2108 ND<50 ND<O 5 ND<0 5 ND<0 5 ND<0 5 – – PACE AMW-4 06116193 2536 406 --- 21 30 ND<50 ND<O 5 ND<0 5 ND<O 5 ND<O 5 --- – PACE AMW-4 10/22193 2536 485 --- 2051 ND<50 ND<O 5 ND<O 5 ND<O 5 ND<O 5 --- PACE AMW-4 01/24/94 2536 481 – 2055 ND<50 ND<O 5 ND<O 5 ND<0 5 ND<O 5 - --- PACE AMW-4 06/07/94 2536 530 – 2006 ND<50 ND<O 5 ND<O 5 ND<0 5 ND<O 5 -- 34 PACE AMW-4 09/13/94 2536 559 – 1977 ND<50 ND<O 5 ND<O 5 ND<O 5 ND<O 5 --- 69 PACE AMW-4 01!10!95 2536 422 2114 ND<50 ND<O 5 ND<O 5 ND<O 5 ND<1 --- 71 ATE AMW-4 03!23195 2536 398 – 2138 ND<50 ND<O 50 ND<O 50 ND<O 50 ND<1 0 79 ATI AMW-4 10104/95 2536 532 — 2004 ND<50 ND<O 50 ND<0 50 ND<0 50 ND<1 0 ND<5 0 59 ATI AMW-4 01104196 2536 448 --- 2088 ND<50 ND<0 50 ND<0 50 ND<O 50 ND<1 0 ND<5 0 10 ATI AMW-4 03/29/96 2536 432 --- 21 04 ND<50 ND<0 5 ND<1 ND<1 ND<1 ND<10 37 SPL AMW-4 07!01196 2536 488 --- 2048 ND<50 ND<O 5 ND<1 ND<1 ND<1 ND<10 61 SPL AMW-4 10/15/96 2536 509 --- 2027 ND<50 ND<O 5 ND<1 0 ND<1 0 ND<1 0 ND<10 75 SPL AMW-4 04/16/97 2536 367 – 21 69 — - – -- -- AMW-4 10/15/97 2536 512 2024 - – - ~- --- --- --- AMW-4 03117/98 2536 471 --- 2065 - --- --- --- -- AMW-4 01/06/99 2536 483 --- 2053 — --- --- --- --- --- AMW-4 09/13199 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 507 – 2029 — - – – -~ --- --- --- --- 20 68 --- --- AMW-4 10l2fi1D0 25 36 4 68 --- -- --- --- --- AMW-4 01/17/01 2536 522 2014 --- --- --- --- --- --- --- I I Blaine Tech Services Inc Report 010117-X-2 BP Oil 11194 at 2375 Tracy Blvd Tracy California Page 20