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TABLE1-SUMMARY OF RESULTS OF GROUNDWATER MONITORING • _ WELL DATE OF CASING DEPTH TO GROUNDWATER TPH-G TPH-D TPH B T E X MTBE HVOC DO LAB ID SAMPLING/ ELEVATION (a) WATER ELEVATION (b) (ug/1) (ugll) (ugA) (ugA) (ugA) (ug/1) (ugA) (ugA) (ugA) (ppm) MONITORING (Feet) (Feet) (Feet) MW-1 12/21/92 397 2040 -1643 2200 --- --- 56 15 ND<0 5 89 MW-1 04/04/93 397 1551 -1154 160 — 92 ND<O 5 ND<0 5 0 6 – MW-1 04/26/93 397 1725 -1328 _ — -- PACE MW-1 10!05193 397 1800 -1403 6004 – --- 460 (c) -- MW-1 01/07/94 397 1775 -1378 6600 — 410 450 0 200 17 1$ 350 {c) -- PACE – — 45 460 2800 (c) -- PACE QC-1 (d) 01/47/94 -- — 8700 — — 460 240 57 600 2800 (c) — -- PACE MW-1 04/20/94 397 1698 -1301 63 --- --- ND<0 5 ND<0 5 ND<0 5 ND<0 5 120 (c) — 40 PACE QC-1 (d) 04120!94 --- -- – ND<50 -- – ND<0 5 ND<d 5 ND<O 5 ND<O 5 200 (c) -- --- MW-1 04/25/94 397 1697 -1300 — PACE_ MW-1 07/28/94 397 1741 -1344 430 — — 36 12 24 71 --- – 39 PACE MW-1 12!09194 397 1789 -1392 2200 -- 36 7 4 3 7 1 7 - - MW-1 03/03/95 3 97 16 55 -1258 1400 ( ) ND<2 5 ND<2 5 a --- – 4 i PACE QC-1 (d) 03/03/95 -_ –_ — ND<2 5 ND<5 0 _ 51 ATI 1400 (e) --- - N0<2 5 ND<2 5 ND<2 5 ND<5 0 ATI MW-1 04/12/95 397 1527 -1130 4700 -- 310 ND<5 0 79 450 MW-1 07/20/95 397 1557 -1160 180 _ 7 8 ATI MW-1 11/02/95 397 1645 -1248 1400 – 47 0 7 3 7 3 8 10 -- 6 8 ATI MW-1 01116196 397 1586 -1189 1400 _-- -- 330 57 8 3 85 3100 -- 4 3 ATI MW-1 04/22/96 397 1375 -978 ND<50 _�_ �` 110 ND<5 0 ND<5 0 5 1 3900 -- -- ATI MW-1 07/12/98 3 97 14 06 -1d 09 1 i00 _ -- ND<0 5 ND<1 ND<1 ND<1 27 -- --- SPL MW-1 11/14/96 3 97 14 96 -10 99 11 00 ~_ – 70 ND<10 ND<10 ND<10 7700 -- 24 SPL MW-1 03/1 f/97 3 97 12 Of -8 04 N0000 _ --- 350 ND<25 ND<25 ND<25 88000 33 SPL – ND<D 5 ND<1 0 Nb<1 0 ND<1 0 ND<10 --- QC-14 3 SPL (d) 03111!97 --- ND<50 --- — N0<0 5 ND<1 0 ND<1 0 ND<1 0 ND<10 SPL MW-1 05/22197 397 1264 -8 67 60 – -- ND<0 5 ND<1 0 ND<1 0 ND<1 0 17 _ – MW-1 08/06/97 397 1380 -983 -- _ -- 3 7 SPL MW-1 09122197 397 1386 -989 ND<50 — – — — --- --- 6 2 --- MW-1 5 ND<1 0 ND<1 0 ND<1 0 ND<10 — 60 SPL MW-1 01/07/98 397 1357 -960 ND<50 -- – ND<0 5 ND<1 0 ND<1 0 ND<1 0 14 MW-1 07/01/98 397 986 -589 2600 5 7 SPL MW-1 09118!98 397 1150 -7 53 3000 �- ND<0 5 ND<1 0 ND<1 0 ND - ND<0 5 ND<1 0 ND<1 0 ND<1 0 3500 6 3 SPL MW-1 (i) 01/19/99 397 ___ ___ _ --- --- --- --- — -- — -- --- -- --- I � Blame Tech Services, Inc,Report 000120-Y-1 BP Oil 11193 at 3202 W Hammer Lane,Stockton,California Page 1