ARCHIVED REPORTS_XR0008101 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) (ug1A) (ug/L) (uglL) (ug/L) (ug/L) (ug/L) (ppm) MONITORING (Feet) (Feet) (Feet) (Feet) MW-2 11/20/87 — --- --- -- ND<50 ND<O 5 ND<0 5 — ND<0 5 — --- — MW-2 03/13188 2633 567 — 2066 — MW-2 03/23/88 2633 563 --- 2070 ND<50 ND<0 5 ND<O 5 -- ND<O 5 - --- — MW-2 06107/88 2633 570 — 2063 — --- — — _ — — MW-2 10/18/88 2633 570 --- 2063 ND<50 ND<0 5 ND<O 5 ND<0 5 ND<O 5 -- --- — MW-2 02/15/90 2633 535 — 2098 50 43 08 07 16 MW-2 04126/90 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 — — MW-2 11/02190 2633 585 --- 2048 — MW-2 11/05/90 2633 587 --- 2046 ND<50 ND<O 3 ND<0 3 ND<O 3 ND<O 3 --- — SUP MW-2 02/25/91 2633 534 --- 2099 ND<50 ND<O 3 ND<0 3 ND<0 3 ND<O 3 --- — SUP MW-2 06/27/91 2633 607 --- 2026 ND<50 ND<O 5 ND<O 5 ND<0 5 ND<O 5 — — CHR MW-2 09/25191 2633 636 — 1997 ND<0 30 ND<0 30 ND<0 30 ND<O 30 ND<0 30 --- --- SEQ MW-2 12JI0191 2633 586 — 2047 ND<0 30 ND<0 30 ND<0 30 ND<O 30 ND<0 30 — --- SEQ MW-2 03/25/92 2633 542 — 2091 240 42 18 080 38 --- --- SEQ MW-2 06/25/92 2633 733 --- 1900 ND<30 ND<0 30 ND<O 30 ND<O 30 ND<0 30 --- — SEQ MW-2 12/08/92 2633 591 --- 2042 61 ND<O 5 ND<0 5 ND<0 5 ND<0 5 — --- ANA MW-2 03/10/93 2633 569 --- 2064 220 35 06 57 92 — (I) — PACE MW-2 06/16/93 2633 353 -- 22 80 ND<50 ND<0 5 ND<0 5 ND<O 5 ND<0 5 --- (I) — PACE MW-2 10/22193 2633 606 --- 2027 460 10 06 14 08 1600 (c)(I) --- PACE QC-1 (d) 10/22/93 --- — — — 460 09 07 14 08 1700 (c)(I) — PACE MW-2 01/24/94 2633 563 — 2070 ND<50 ND<O 5 ND<0 5 ND<0 5 06 209 (t} — PACE MW-2 06107/94 2633 608 -- 2025 ND<50 ND<O 5 N0<0 5 ND<0 5 ND<O 5 ND<5 0 (1) 28 PACE MW-2 09/13/94 2633 636 --- 1997 ND<50 ND<O 5 ND<O 5 ND<O 5 ND<0 5 ND<5 0 (1) 81 PACE MW-2 01/10/95 2633 554 — 2079 100 6 2 ND<0 5 12 — 52 ATI MW-2 03123/95 2633 513 — 2010 ND<50 153 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 03129/96 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 04/16197 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 SPL QG-1 (d) 10/15/97 — --- — --- ND<50 ND<0 5 ND<1 0 ND<1 0 ND<1 0 120 --- SPL MW-2 03/17198 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 Toervices,Inc,Report 020430-EB-1,BP Oil 11194 at 2375 Tracy Blvd,Tracy Cafr age 3