ARCHIVED REPORTS_XR0008671 CASE 1

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• i 0 - TABLE 1 -SUMMARY OF RESULTS OF GROUNDWATER MONITORING r WELL DATE OF CASING DEPTH TO PRODUCT GROUNDWATER TPN-G B T E X MTBE DO LAB ID SAMPLING! ELEVATION (a) WATER THICKNESS ELEVATION (b) (ug111) (ugA) (ugA) (UgA) (ugA) (ugA) (ppm) MONITORING (Feet) (Feet) (Feat) (Feet) AMW 6 12/10/91 2668 585 --- 2083 ND<30 ND<O 30 ND<O 30 ND<O 30 ND<0 30 --- SEQ AMW-6 03/25/32 2668 486 --- 2182 97 43 ND<O 30 74 61 --- --- SEQ AMW 6 06/25132 2668 700 --- 19 68 ND<30 NDN 30 ND<0 30 ND<0 30 ND<O 30 - - SEQ AMW-6 12108/92 2668 582 --- 2086 ND<50 ND<O 5 ND<0 5 NDN 5 ND<O 5 --- --- ANA AMW 6 03/10/93 2668 547 --- 2121 ND<50 NDN 5 ND<O 5 ND<0 5 ND<0 5 --- --- PACE AMW-6 06/16/93 2668 348 --- 2320 ND<50 ND<O 5 NDN 5 ND<0 5 NDN 5 — PACE AMW-6 10/22/93 2668 590 --- 2078 ND<50 NDN 5 ND<O 5 NDN 5 NDN 5 --- -- PACE AMW-6 01/24/94 2668 578 --- 2090 ND<50 ND<O 5 ND<O 5 ND<0 5 NDN 5 --- --- PACE QC-1 (d) 01/24/94 --- --- --- --- ND<50 NDN 5 ND<O 5 ND<O 5 ND<O 5 - --- PACE AMW-6 06/07/94 2668 623 --- 2045 ND<50 ND<0 5 ND<O 5 NDN 5 ND<O 5 - 34 PACE AMW-6 09/13/94 2668 639 2029 ND<50 ND<O 5 ND4 5 ND<O 5 NDN 5 --- 82 PACE AMW-6 01/10/95 2668 540 --- 2128 ND<50 1 ND<O 5 3 2 --- 64 ATI AMW-6 03/23/95 2668 550 --- 2118 ND<50 ND<O 50 ND<O 50 ND<O 50 ND<1 0 84 ATI AMW-6 10/04/95 2668 618 --- 2050 ND<50 ND<0 50 ND<O 50 ND<O 50 ND<10 ND<5 0 66 ATI AMW-6 01/04/96 2668 568 --- 2100 ND<50 ND<O 50 ND<0 50 ND<O 50 ND<10 68 14 ATI AMW-6 03/29/96 2668 546 --- 2122 60 NDN 5 ND<1 ND<1 ND<1 26 35 SPL AMW-6 07/01/96 2668 601 --- 2067 ND<50 ND AMW-6 10/15/96 2668 621 - 2047 ND<50 NDN 5 ND<10 ND<10 ND<10 ND<10 56 SPL AMW-6 04/16/97 2668 487 - 2181 - - -- --- --- --- AMW-6 10/15/97 2668 860 --- 1808 AMW-6 03/17/98 2668 813 --- 1855 - --- --- --- --- - - AMW-6 01/06/99 2668 511 2157 --- - - --- --- --- --- --- AMW-6 09/13/99 2668 523 --- 2145 --- --- --- -- — QC 2 (1) 12/08/92 --- --- -- ND<50 ND<O 5 NDN 5 ND<O 5 ND<O 5 --- ANA QC-2 (i) 03/10/93 --- --- --- --- ND<50 NDN 5 NDN 5 NDN 5 NDN 5 -- --- PACE QC-2 (1) 06/16/93 --- --- --- ND<50 ND<O 5 ND<0 5 ND<0 5 ND<O 5 --- --- PACE QC-2 (+) 10/22/93 --- --- --- — ND<50 ND<0 5 ND<O 5 ND<O 5 NDN 5 --- - PACE QC-2 (i) 01/24/94 --- --- --- --- ND<50 NDN 5 ND<O 5 ND<0 5 NDN 5 --- --- PACE QC-2 (i) 06/07/34 --- --- --- --- ND<50 ND<05 NDN5 NDN5 ND<O5 --- --- PACE QC-2 (i) 09/13/94 --- - ND<50 ND<0 5 NDN 5 NDN 5 ND<O 5 --- --- PACE QC-2 (i) 01/10/95 --- -- - ND<50 ND<O 5 ND<0 5 ND<O 5 ND<1 --- --- ATI 00-2 (1) 03/23/95 --- --- --- ND<50 ND<O 50 ND<O 50 ND<O 50 ND<10 --- --- ATI QC-2 (t) 10/04/95 - --- ND<50 ND<0 50 ND<O 50 ND<O 50 ND<1 0 ND<50 --- ATI QC-2 (E) 01/04/96 - --- --- --- ND<50 ND<O 50 ND<O 50 ND<O 50 ND<1 0 ND<50 - ATI 00-2 (i) 03/29/96 - --- ND<50 NDN 5 ND<1 ND<1 ND<1 ND<10 --- SPL QC-2 (i) 07/01/96 --- --- ND<50 NDN 5 ND<1 ND<1 ND<1 ND<10 --- SPL Blaine Tech Services,Inc,Report,990913-F-1,BP Oil 11194 at 2375 Tracy Blvd,Tracy,California Page 16