ARCHIVED REPORTS_XR0008109 CASE 1

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TABLE OMMARY OF RESULTS OF GROUNDWATER MONITORING � 0 WELL DATE OF CASING DEPTH TO PRODUCT GROUNDWATER TPH G B T E X MTBE DO LAB ID SAMPL.INGI ELEVATION (a) WATER THICKNESS ELEVATION (b) (uglll) (ug1L) (uglL) (uglL) (ug1L) (uglL) (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 --- _-_ --- --- AMW-4 11102/90 2536 489 2047 --- -- AMW-4 11105/90 2536 488 -- 2048 ND<50 03 ND<O 3 ND<O 3 ND<0 3 --- SUP AMW-4 02125/91 2536 408 --- 2128 ND<50 ND<0 3 ND<O 3 ND<0 3 ND<0 3 --- — SUP AMW 4 06127/91 2536 501 2035 ND<50 ND<O 5 ND<O 5 ND<O 5 ND<0 5 --- --_ CHR AMW-4 09/25191 2536 545 --- 1991 ND<30 ND<0 30 ND<O 30 ND<O 30 ND<O 30 --- SEO AMW-4 12/10/91 2536 479 -- 2057 ND<30 ND<0 30 ND<0 30 ND<O 30 ND<0 30 --- --- SEQ AMW4 03125/91 2536 426 — 2110 ND<30 ND<0 30 ND<0 30 ND<O 30 ND<O 30 --- — SEQ AMW-4 06/25/92 2536 616 --- 1920 ND<30 ND<O 30 ND<0 30 ND<0 30 ND<O 30 -- --- SEQ AMW-4 12/08/92 2536 474 --- 2062 ND<50 ND<0 5 ND<O 5 ND<0 5 ND<O 5 ANA AMW-4 03/10/93 2536 428 --- 2108 ND<50 ND<O 5 ND<O 5 ND<0 5 ND<O 5 -- (I) -- PACE AMW4 06/16/93 2536 406 --- 2130 ND<50 ND<O 5 ND<O 5 ND<0 5 ND<O 5 — (1) --- PACE AMW 4 10/22/93 2536 485 --- 2051 ND<50 ND<0 5 ND<0 5 ND<0 5 ND<0 5 ND<50 (1) PACT AMW-4 01/24/94 2536 481 --- 2055 ND<50 ND<O 5 ND<O 5 ND<O 5 ND<O 5 ND<50 (1) PAC[ AMW-4 06/07/94 2536 530 --- 2006 ND<50 ND<O 5 ND<O 5 ND<O 5 ND<O 5 ND<5 0 (1) 34 PAC[ AMW-4 09/13/94 2536 559 --- 1977 ND<50 ND<O 5 ND<0 5 ND<O 5 ND<O 5 ND<5 0 (1) 69 PAC[ AMW 4 01/10/95 2536 422 2114 ND<50 ND<O 5 ND<0 5 ND<O 5 ND<1 -- 711 ATI AMW-4 03/23/95 2536 398 --- 2138 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<0 50 ND<1 0 ND<50 59 ATI AMW 4 01/04196 2536 448 --- 2088 ND<50 ND<O 50 ND<0 50 ND<0 50 ND<1 0 ND<50 10 ATI AMW 4 03/29196 2536 432 --- 21 04 ND<50 ND<O 5 ND<1 ND<1 ND<1 ND<10 37 SPL AMW-4 07101/96 2536 488 --- 2048 ND<50 ND<O 5 ND<1 ND<1 ND<1 ND<10 61 SPI. AMW 4 10115/96 2536 509 --- 2027 ND<50 ND<O 5 ND<1 0 ND<1 0 ND<1 0 ND<10 75 SPI. AMW 4 04116197 25 36 367 — 2169 --- --- AMW 4 10/15/97 2536 512 --- 2024 --- --- --- -- AMW 4 03/17/98 2536 4 71 2065 --_ --- AMVV-4 01/06/99 2536 483 --- 2053 --- -_- AMW-4 09/13/99 2536 5 13 --- 2023 --- -- --- --- --- - AMW 4 01/19100 2536 4 55 --- 2081 AMW 4 04/12/00 2536 440 --- 2096 --- _-_ AMW 4 07/22/00 2536 507 --- 2029 --- --- AMW-4 --A W-4 10/26/00 2536 468 --- 2068 --- __- --_ --- --- --- -- AMW-4 01/17/01 2536 522 -- 2014 -. 4 W-4 04/12/01 2536 476 — 2060 __ -- AMW-4 05123/01 2536 485 --- 2051 ND<50 ND<O 5 1 47 ND<O 5 ND<1 5 ND<O 5 -- PACE Blaine Tech Services Inc,Report 010523-K-1 BP Oil 11194 at 2375 Tracy Blvd Tracy California Page 20