ARCHIVED REPORTS_XR0008658 CASE 1

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TABLE OUMMARY 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//I) (ug/1) (ug/1) (ug/1) (ug/1) (ug/9 (ppm) MONITORING (Feet) (Feet) (Feet) (Feet) MW-2 11/20187 --- — — — ND<50 ND<0 5 ND<O 5 -- ND<O 5 — MW-2 03/13/88 2633 567 — 2066 — MW-2 03/23/88 2633 563 — 2070 ND<50 ND<0 5 ND<0 5 --- ND<0 5 — — — MW-2 06/07/88 2633 570 -- 2063 — MW-2 10/18/88 2633 570 -- 2063 ND<50 ND<0 5 ND<O 5 ND<O 5 ND<0 5 — ^ MW-2 02/15190 2633 535 — 2098 50 43 08 07 16 MW-2 04/26/90 2633 550 — 2083 — ,,,,- MW-2 07/12/90 2633 548 -- 2085 80 04 13 05 15 SUP MW-2 08/27/90 2633 580 — 2053 -- — MW-2 19102/90 2633 585 — 2048 — MW-2 11/05/90 2633 587 — 2046 ND<50 ND<0 3 ND<0 3 ND<0 3 ND<O 3 SUP MW-2 02/25/91 2633 534 --- 20 99 ND<50 ND<0 3 ND<O 3 ND<0 3 ND<O 3 — SUP MW-2 08/27/91 26 33 6 07 --- 20 26 ND<50 ND<0 5 ND<0 5 ND<0 5 ND<0 5 — — CHR MW-2 09/25/91 2633 636 --- 1997 ND<O 30 ND<O 30 ND<0 30 ND<O 30 ND<0 30 — SEQ MW-2 12/10/91 26 33 586 — 2047 ND<O 30 ND<0 30 ND<0 30 ND<O 30 ND<0 30 — SEQ MW-2 03125192 26 33 542 --- 2091 240 42 18 080 38 SEQ MW-2 06/25/92 2633 733 -- 1900 ND<30 ND<0 30 ND<0 30 ND<0 30 ND<0 30 SEQ MW-2 12/08/92 2633 591 -- 2042 61 ND<0 5 ND<O 5 ND<O 5 ND<O 5 -- — ANA MW-2 03/10/93 2633 569 --- 2064 220 35 06 57 9 2 -- PACE MW-2 06/16/93 2633 353 -- 22 80 ND<50 ND<O 5 ND<0 5 ND<0 5 ND<0 5 _ PACE MW-2 10122193 2633 6 06 — 20 27 460 10 06 14 08 1570 (c) — PACE QC-1 (d) 10/22/93 --- — 460 09 07 14 08 1700 (c) — PACE MW-2 01124/94 2633 563 --- 2070 ND<50 ND<0 5 ND<0 5 ND<0 5 06 -- PACE MW-2 06/07/94 2633 608 — 2025 ND<50 ND<0 5 ND<O 5 ND<0 5 ND<0 5 -- 28 PACE MW-2 09/13/94 2633 636 — 1997 ND<50 ND<0 5 ND<0 5 ND<0 5 ND<O 5 — 81 PACE MW-2 01/10/95 2633 554 2079 100 6 2 ND<O 5 12 — 52 ATI MW-2 03123/95 2633 563 --- 2070 ND<50 053 ND<0 50 051 19 89 ATI MW-2 10/04/95 2633 637 --- 1996 210 ND<1 0 ND<1 0 ND<1 0 ND<2 0 840 71 ATI MW-2 01/04/96 2633 590 --- 2043 3900 ND<25 ND<25 ND<25 ND<50 12000 30 ATI MW-2 03/29/96 2633 659 — 1974 9200 34 9 3 4 12000 36 SPL QC-1 (d) 03/29/96 — — — --- 11000 37 9 4 5 13000 — SPL MW-2 07/01/96 2633 716 — 1917 5200 58 33 ND<1 ND<1 10000 31 SPL MW-2 10/15/96 2633 734 --- 1899 ND<250 ND<2 5 ND<5 0 ND<5 0 ND<5 0 14000 40 SPL MW-2 04/16/97 2633 _ 598 -- 2035 180 ND<O 5 ND<1 0 ND<1 0 ND<1 0 57 42 SPL MW-2 10/15/97 2633 608 --- 2025 ND<50 ND<0 5 ND<1 0 ND<1 0 ND<1 0 120 54 SAL QC-1 (d) 10/15/97 -- — ND<50 ND<0 5 ND<1 0 ND<1 0 ND<1 0 120 SPL MW-2 03/17/98 2633 557 — 2076 170 ND<0 5 ND<1 0 ND<1 0 ND<1 0 180 61 SPL MW-2 (h) 01/06/99 2633 — — — MW-2 09/13/99 2633 561 --- 2072 480 35 73 ND<5 0 ND<5 0 99000191000 — — Blaine Tech Services Inc Report 001026-S-2 SP Oil 11194 at 2375 Tracy Blvd Tracy California Page 3