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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) (ugll) (ug/1) (ug/1) (ug/1) (ug/1) (ug/1) (ppm) MONITORING (Feet) (Feet) (Feet) MW-2 (f) 05/01/90 596 2523 -- ND ND ND ND ND --- --- PRE MW-3 05/01/90 552 2523 -1971 200 33 ND 2 15 - --- PRE MW-3 08105/91 552 DRY --- --- -- --- --- --- --- --- PRE MW-3 12/09/91 552 DRY --- -- -- -- --- – – PRE MW-3 03/09/92 552 DRY -- -- --- --- --- --- --- --- PRE MW-3 06/19192 552 DRY --- --- --- – --- --- --- --- ANA MW-3 09/18/92 552 DRY --- --- - --- --- ANA MW-3 12/09/92 552 DRY --- – --- - -- --- ANA MW-3 03/11193 652 DRY -- -- - --- --- -- --- --- PACE � MW-3 06115!93 552 2702 -2150 -- -- --- --- --- --- PACE MW-3 09/15/93 552 2743 -21 91 -- — -- --- --- --- --- PACE MW-3 12/22/93 552 2730 -2178 2300 31 65 120 220 --- --- PACE QC-1 (d) 12/22/93 --- --- --- 2300 31 66 120 220 --- --- PACE MW-3 04/01/94 552 2642 -2090 --- --- -- -- -- -- --- MW-3 07/27/94 552 2650 -2098 920 82 2 41 64 --- 32 PACE QC-1 (d) 07/27/94 -- --- --- 1100 86 24 60 90 - --- PACE MW-3 11/30/94 552 2686 -21 34 --- --- --- --- -- — --- MW-3 02/15/95 552 2655 -2103 1200 10 12 85 110 --- 35 ATI j QC-1 (d) 02115/95 -- -- --- 950 91 099 59 79 --- --- ATI MW-3 04/21195 552 2458 -19 06 -- — --- --- --- - -- MW-3 07/19/95 552 2369 -1817 --- -- - --- --- --- --- — MW-3 (e) 10/20/95 552 2411 -1859 520 56 ND<0 50 22 14 410 43 ATI MW-3 10/20/95 552 --- -- 520 47 ND<O 50 14 12 240 47 ATI MW-3 (e) 04/23/96 552 2080 -1528 ND<500 57 2 2 1 300 --- SPL MW-3 04/23/96 552 --- --- ND<500 51 ND<O 5 10 5 280 – SPL QC-1 (d) 04/23/96 552 -- --- ND<500 51 ND<0 5 12 4 240 SPL MW-3 07/12/96 552 2150 -1598 --- --- --- --- --- --- --- --- MW-3 10/18/96 552 2067 -1515 480 30 25 NI)<1 0 ND<1 0 300 59 SPL MW-3 02/26/98 552 1258 -706 1200 10 ND<1 0 ND<1 0 ND<1 0 890 43 SPL MW-3 07107/98 552 1219 -667 6600 ND<0 5 ND<1 0 ND<1 0 11 8300 37 SPL QC-1 (d) 07/07/98 552 -- --- 6900 ND<0 5 ND<1 0 ND<1 0 11 8500 43 SPL MW-3 01/19/99 552 1310 -758 12000 ND<5 0 ND<5 0 ND<5 0 ND<5 0 15000 --- SPL MW-3 07/14/99 552 131l -759 29000 ND<5 0 ND<5 0 20 30 38000 --- SPL MW-3 10/07/99 552 1458 -906 52000 ND<1 0 ND<1 0 87 11 35000 --- SPL Blaine Tech Services, Inc, Report 010116-K-1 BP Oil 11192 at 1403 Country Club Blvd Stockton, California Page 2