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TABLE 1 -SUMMARY OF RESULTS OF GROUNDWATER MONITORING _ WELL DATE OF CASING DEPTH TO GROUNDWATER TPH-G B T E X MTBE DO LAB ID SAMPLING! ELEVATION (a) WATER ELEVATION (b) (ug/1) (ug/1) (ug/1) (ugll) (ugll) (ug/1) (ppm) MONITORING (Feel) (Feet) (Feet) MW-4 05/01190 675 2631 -1956 ND ND ND ND NO — PRE MW-4 08/05/91 675 DRY -- -- --- — --- -- -- -- PRE MW-4 12/09191 675 DRY – --- --- - -- -- -- PRE MW-4 03/09192 675 DRY -- – – -- -- — — ANA MW-4 06/19/92 675 DRY -- -- - --- -- -- -- ANA MW-4 09/18/92 675 DRY --- --- --- -- -- -- --- --- ANA MW-4 12/09/92 675 DRY -- – — -- – --- -- -- ANA MW-4 03/11/93 675 DRY --- - -- -- --- --- --- — PACE MW-4 06115/93 675 2801 -2126 -- --- -- — - -- -- PACE MW-4 09115/93 675 2850 -2175 --- -- — -- — PACE MW-4 12/22/93 675 2833 -2158 ND<50 ND<0 5 ND<0 5 ND<0 5 ND<0 5 -- — PACE MW-4 04/01/94 675 2745 -2070 --- MW-4 07/27/94 675 2746 -2071 190 ND<0 5 ND<0 5 ND<0 5 ND<0 5 – 23 PACE MW-4 11/30/94 675 2797 -21 22 -- -__ -__ MW-4 02/15/95 675 2685 -2010 ND<50 ND<0 50 ND<0 50 ND<0 50 ND<1 0 -- 28 ATI MW-4 04/21/95 675 2477 -1802 MW-4 07/19/95 675 2407 -1732 ND<50 ND<0 50 ND<0 50 ND<0 50 ND<1 0 51 ATI MWS (e} 10/20/95 675 2450 -1775 ND<50 ND<0 5D ND<0 50 NO<0 50 ND0 0 ND<5 0 60 ATI MW-4 10/20/95 675 2524 -1849 ND<50 ND<0 50 ND<0 50 ND<0 50 ND<1 0 ND<5 0 65 ATI MW-4 (e) 04/23/96 675 2113 -1438 ND<500 ND<0 5 ND<0 5 ND<0 5 ND<D 5 14 --- SPL MW-4 04/23196 675 --- — ND<500 ND<0 5 ND<0 5 ND<0 5 ND<0 5 ND<10 -- SPL MW-4 07/12/96 675 2042 -1367 -- MW-4 10118/96 675 1963 -1288 130 ND<O 5 ND<1 0 ND<1 0 ND<1 0 ND<10 53 SPL MW4 02/26/98 675 1301 -626 ND<50 ND<0 5 ND<1 0 ND<1 0 ND<1 0 ND<10 44 SPL MW-4 07/07/98 675 1261 -586 ND<50 ND<0 5 ND00 ND<1 0 ND<1 0 ND<10 37 SPL MW-4 01/19/99 675 1459 -784 ND<50 ND<1 0 ND<1 0 ND<1 0 ND<1 0 26 -- SPL MW-4 07/14199 675 1355 -680 ND<50 ND<1 0 ND<1 0 ND<1 0 ND<1 0 83 -- SPL MW-4 10/07/99 675 1508 -833 220 ND<1 0 ND<1 0 ND00 ND<1 0 170 SPL MW-4 01120/00 675 1540 -865 ND<50 ND<0 5 ND<0 5 ND<0 5 ND<0 5 320 -- PACE MW-4 04/11/00 675 1431 -756 ND<50 ND<0 5 ND<0 5 ND<0 5 ND<D 5 64 PACE MW4 07/14/00 675 1302 -627 98 ND<0 5 ND<D 5 ND<0 5 ND<0 5 290 --- PACE Blaine Tech Services,Inc,Report 000714-N-1,BP Oil 11192 at 1403 Country Club Blvd,Stockton,California Page 3