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TABLE 1 -SUMMARY OF RESULTS OF GROUNDWATER MONITORING �r WELL DATE OF CASING DEPTH TO GROUNDWATER TPH-G TPH-D B T E X MTBE TOG HVOCs DO LAB iD SAMPLING/ ELEVATION (a) WATER ELEVATION (b) (ug/1) (ug") (ug/1) (ug/1) (ug11) (ug/1) (ug/1) (ug/1) (ug/1) (ppm) MONITORING (Feet) (Feet) (Feet) PAW-5 12/21/92 10.70 12.74 -2.04 ND<50 -- ND<0.5 ND<0.5 ND<0.5 ND<0.5 - -- __ __ PACE MW-5 05/17/93 10.70 9.94 0.76 ND<50 110 ND<0.5 ND<0.5 ND<0.5 ND<1.0 --- ND<5.0 ND (f) --- PACE MW-5 09/15/93 10.70 11.31 -0.61 ND<50 ND<50 ND<0.5 ND<0.5 ND<0.5 ND<0.5 --- --- -- --- PACE MW-5 01/12/94 10.70 12.07 -1.37 ND<50 80 ND<0.5 ND<0.5 ND<0.5 ND<0.5 - ND<5000 ND (f) 4.5 PACE MW-5 05/12/94 10.70 11.36 -0.66 ND<50 80 ND<0.5 ND<0.5 ND<0.5 ND<0.5 --- ND<5000 ND (fj 4.5 PACE MW-5 10/07/94 10.70 12.15 -1.45 ND<50 260 ND<0.5 ND<0.5 ND<0.5 ND<0.5 ND<5000 ND (t7 4.4 PACE MW-5 12/08/94 10.70 12.32 -1.62 ND<50 250 N0<0.5 ND<0.5 ND<0.5 ND<0.5 ND<5000 ND (f) 4.5 PACE MW-5 02!21195 10.70 10.01 0.69 ND<50 ND<50 ND<0.50 ND<0.50 ND<0.50 ND<1.0 --- 110 ND 7.8 ATI MW-5 06!09195 10.70 9.49 1.21 --- --- --- --- -- - --- --- - -- -- MW-5 08/31/95 10.70 11.39 -0.69 ND<50 230 ND<0.50 ND<0.50 ND<0.50 ND<1.0 ND<5.0 -- - 8.2 ATI 1\11W-5 11/02/95 10.70 11.99 -1.29 - --- - -- - --- -- --- MW-5 02/28/96 1070 8.53 2.17 ND<50 70 ND<0.5 ND<1 ND<1 ND<1 ND<10 --- - 9.6 SPL MW-5 09!05196 10.70 10.73 -0.03 ND<50 ND<50 ND<0.5 ND<1.0 ND<1.0 ND<1.0 ND<10 -- --- 8.9 SPL MW-5 03/25/97 10.70 7.71 2.99 ND<50 ND<100 ND<0.5 ND<1.0 ND<1.0 ND<1.0 ND<10 - - 7.7 SPL MW-5 10/15/97 1070 12.28 -1.58 2200 --- ND<2.5 ND<5.0 ND<5.0 ND<5.0 93000 - -- 6.2 SPL MW-5 01/15/98 10.70 10.98 -0.28 3600 -- ND<0.5 ND<1.0 ND<1.0 ND<1.0 33000 --- --- 5.4 SPL MW-5 05/07/98 10.70 8.02 2.68 --- --- -- - -- -- -- -- --- --- MW-5 09/03/98 10.70 10.28 0.42 13000 -- ND<0.5 ND<1.0 ND<1.0 ND<1.0 8000 -- 5.8 SPL MW-5 12/23/98 10.70 10.91 -0.21 130000 -- ND<2.5 ND<5.0 ND<5.0 ND<5.0 160000 -- --- --- SPL MW-5 12/31/98 10.70 10.92 -0.22 110000 -- ND<25 ND<25 ND<25 ND<25 160000 -- - SPL MW-5 03/22/99 10.70 10.73 -0.03 85000 100 ND<25 ND<25 ND<25 ND<25 95000 --- - -- SPL Blaine Tech Services, Inc., Report 990322-R-2, BP 11195 at 16500 1-5, Lathrop, California Page 5