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• • 1 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) (UgA) NO (UgA) 09/1) (ug/1) (ugA) (ppm) MONITORING (Feet) (Feet) (Feet) VW-2 12/09/92 - DRY --- - - -- --- - -__ VW-2 03/11/93 --- DRY --- --- --- --- --- --- --- --- VW-2 06/15/93 --- DAY --- --- --- - --- --- VW-2 09/15/93 --- DRY - --- --- --- -__ - -- -- VW-2 12/22/93 --- - --- --- VW-2 -VW-2 02/15/95 --- --- -- MW-1 05/01/90 5.52 25.11 -19.59 140 1 ND ND ND --- --- PRE MW-1 08/05/91 5.52 DRY PRE MW-1 12/09/91 5.52 DRY -- - - - -- --- --- PRE MW-1 03/09/92 5.52 DRY - --- --- --- -- PRE MW-1 06/19/92 5.52 DRY -- --- --- - -- --- ANA MW-1 09/18/92 5.52 DRY --- - --- --- - -- - ANA MW-1 (c) 12/09/92 5.52 DRY --- - --- -- --- --- --- --- ANA MW-1 02/15/95 5.52 --- --- --- --- --- -- --- --- --- ANA MW-1 04/2/ 1/35 5.52 23.82 -18.30 820 27 2.6 3.1 5.6 --- 4.5 ATI 00-1 (d) 04/21/15 --- --- ... 720 31 2.9 3.5 5.7 --- --- ATI MW-1 07/19/95 5.52 22.92 -17.40 620 40 2 2.4 2.3 --- 5.2 ATI MW-1 (e) 10/20/95 5.52 23.32 -17.80 440 16 0.51 0.73 2.2 6.4 4.7 ATI 00-1 (d)(e) 10/20/95 -- --- -- 480 17 ND<0.50 ND<0.50 1.5 ND<5.0 --- ATI MW-1 10/20/95 --- - --- 450 30 0.67 0.60 1.0 5.3 4A ATI OC-1 (d) 10/20/95 --- --- --- 460 29 0.91 0.52 1.5 ND<5.0 --- ATI MW-1 (e) 04/23/96 5.52 19.87 -14.35 ND<500 11 ND<0.5 ND<0,5 ND<0.5 49 --- SPL MW-1 04/23/96 5.52 --- --- ND<500 10 ND<0.5 ND<0.5 ND<0.5 42 - SPL MW-1 07/12/96 5.52 20.99 -15.47 - --- --- - --- --- MW-1 10/18/96 5.52 20,16 -14.64 160 ND<0.5 ND<1.0 ND<1.0 ND<1.0 ND<10 5.3 SPL MW-1 02/26/38 5.52 11.90 -6.38 470 1.6 ND<1.0 ND<1.0 ND<1.0 370 4,8 SPL MW-1 07/07/98 5.52 11.40 -5.88 800 ND<0.5 ND<1.0 ND<1.0 ND<1.0 700 3,6 SPL MW-1 01/19/99 5.52 13.47 -7.95 730 ND<1.0 ND<1.0 ND<1.0 ND<1.0 840 -- SPL MW-1 07/14/99 5.52 12.27 -6.75 3000 ND<1.0 ND<1.0 ND<1.0 ND<1.0 3300 --- SPL MW-1 10/07/99 5,52 13.90 -8.38 4000 ND<1.0 ND<1,0 ND<1.0 ND<1.0 2500 --- SPL MW-2 (f) 05/01/30 5.96 25.23 -- ND ND ND ND ND -- --- PRE Blaine Tech Services,Inc.,Report 991007-N-2,BP Oil 11192 at 1403 Country Club Blvd.,Stockton,California Page 1