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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) (ug/1) (ugll) (ug/1) (ppm) MONITORING (Feet) (Feet) (Feet) VW-2 12/09/92 - DRY - --- --- VW-2 03/11/93 -- DRY -- --- --- -- - -- - - - VW-2 06/15/93 DRY - --- --- --- - -- - - - VW-2 09/15193 --- DRY - --- --- VW-2 --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 09/18192 5.52 DRY --- --- -- --- --- --- --- --- ANA MW-1 (c) 12/09192 5.52 DRY -- -- --- --- -- - -- - ANA MW-1 02/15/95 5.52 -- -- --- - --- -- - --- ANA MW-1 04/21/95 5.52 23.82 -18.30 820 27 2.6 3.1 5.6 -- 4.5 ATI QC-1 (d) 04/21/95 --- --- --- 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 QC-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 4.4 ATI QC-1 (d) 10/20/95 --- - 460 29 0.91 0.52 1.5 ND<5.0 --- ATI MW-1 (e) 04/23196 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 02/26/98 5.52 11.90 -6.38 470 1.6 ND<1.0 ND<1.0 ND<1.0 370 4.8 SPL MW-1 07107198 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-2 {fJ 05/01/90 5.96 25.23 -- ND ND ND ND ND - - PRE MW-3 05/01/90 5.52 25.23 -19.71 200 33 ND 2 1.5 - --- PRE MW-3 08/05/91 5.52 DRY --- -- --- - --- --- --- -- PRE tv1W-3 12/09/91 5.52 DRY - --- --- -- -- ___ PRE MW-3 03/09/92 5.52 DRY -- --- --- ___ PRE MW-3 06/19/92 5.52 DRY --- --- --- - --- --- -- ANA MW-3 09/18/92 5.52 DRY --- --- --- --- --- ___ -_ --- ANA MW-3 12/09/92 5.52 DRY -- - - - - -- -- - ANA Blaine Tech Services, Inc., Report 990119-J-1,BP Oil 11192 at 1403 Country Club Blvd.,Stockton,California Page 1