ARCHIVED REPORTS_XR0008635 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 10-0B5 WELL DATE OF CASING DEPTH TO PRODUCT GROUNDWATER TPH-G B T E X MTBE DO IAB ID SAMPLING! ELEVATION{a) WATER THICKNESS ELEVATION (6) (ucyA) (4) (ugA) (ugA) (um) (ugA) (ppm) MONITORING (Feet) (Feet) (Feet) (Feet) AMW 3 08110x50 2529 746 1783 90 06 41 28 21 — SUP AMW 3 08!27190 2529 746 — 1783 — — — — _ AMW 3 11/02/90 2529 --- - - AMW 3 11/05/90 2529 758 - 1771 ND<50 ND<0 3 ND<O 3 ND<O 3 ND<O 3 — — SUP AMW 3 02125/91 2529 703 - 1826 ND<50 ND<0 3 ND<0 3 ND<O 3 ND<O 3 SUP AMW 3 06/27/91 2529 760 - 1769 ND<-% ND<0 5 ND<O 5 ND<O 5 ND<0 5 -- CHR AMW 3 09125191 2529 792 - 1737 ND<30 ND<O 30 ND<030 ND<0 3o ND<030 — SEQ AMW 3 12/10/91 2529 756 - 1773 ND<30 ND<030 ND<O 30 ND<0 30 ND<030 — SEQ AMW 3 OaQ5/92 2529 716 - 1613 ND<30 ND<O 30 ND<O 30 ND<0 30 ND<O 30 — - SEQ AMW 3 06/25M2 2529 805 - 1724 ND<30 ND<030 ND<030 ND<O 30 ND<O 30 — SEQ AMW 3 1208(92 2529 737 - 1792 ND<50 ND<O 5 ND<O 5 ND<O 5 N04 5 — ANA AMW 3 03/10/93 2529 709 - 1820 ND<50 ND<O 5 ND<0 5 ND<0 5 ND<0 5 --- — PACE AMW 3 06/16/93 2529 721 - 1808 — AMW 3 1022/93 2529 744 — 17 B5 AMW 3 01/24/94 2529 722 — 1807 ND<50 ND<0 5 ND<0 5 ND<O 5 ND<0 5 — — PACE AMW 3 06/07134 2529 770 - 1759 ND<50 ND<0 5 ND<0 5 ND<o 5 ND<0 5 - 34 PACE AMW 3 09/13134 2529 764 - 1765 — — — — ' AMW 3 01/10/55 2529 663 - 1846 AMW 3 03x23195 2529 664 - 1865 ND<50 ND<0 50 ND<O 50 ND<0 50 ND<l 0 — 93 An AMW-3 10/04)95 2529 759 - 17 70 — AMW 3 0164M 2529 710 - 1819 AMW-4 08/10/90 2536 483 - 2053 ND<50 06 07 29 4.2 - SUP AMW-4 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<0 3 NM 3 ND<0 3 — — SUP AMW-4 02125/91 2536 408 — 2128 ND<50 ND<O 3 ND<0 3 N0<03 ND<O 3 — - SUP AMW-0 06/27/91 2536 501 — 2035 ND<50 ND<0 5 ND<O 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<0 30 ND<0 30 — - SEQ AMW-4 12/10/91 2536 479 - 2057 ND<30 ND<030 ND<O 30 ND<030 ND<O 30 — SEQ AMW4 03/25/91 2536 426 - 2110 ND<30 ND<030 ND<O 30 ND<o 30 ND<030 — SEQ AMW-4 06125/92 2536 616 — 1920 ND<30 ND<0 30 ND<O 30 ND<030 ND<O 30 — SEQ AMW4 12/08/92 2536 474 — 2062 ND<50 ND<0 5 ND<O 5 ND<O 5 ND<0 5 — — ANA AMW-4 03/10/93 2536 428 --- 2108 ND<50 ND<0 5 ND<0 5 NM 5 ND<0 5 --- - PACE AMW-4 06/16193 2536 406 — 21 30 ND<50 ND<O 5 NM 5 ND<0 5 ND<O 5 — PACE AMW-4 10/22/93 2536 485 --- 2051 ND<50 ND<O 5 ND<0 5 ND<0 5 ND<0 5 PACE AMW-4 01124134 2536 481 - 2055 ND<50 ND<O 5 ND<0 5 ND<0 5 ND<0 5 --- - PACE AMW-4 06/07134 2536 530 — 2006 ND<50 ND<0 5 ND<O 5 ND<0 5 ND<0 5 — 34 PACE AMWA 09/13/94 2536 559 - 1977 ND<50 ND<0 5 ND<O 5 ND<0 5 ND<0 5 — 69 PACE AMW-4 Oi/10195 2536 422 2114 ND<50 ND<O5 ND<05 ND<O5 ND<1 --- 71 ATI AMW-4 03/23/95 2536 398 — 2138 ND<50 ND<O 50 ND<O 50 ND<0 50 ND<l 0 — 79 ATI AMW-4 10/04/55 2536 532 — 2004 ND<50 ND<0 50 ND<O 50 ND<o 50 ND<1 0 ND<50 59 ATI AMW-4 01/34!96 2536 448 2088 ND<50 ND<O 50 ND<0 50 ND<0 50 ND<1 0 ND<5 0 10 ATI 21 Mar 96 PAGE 6