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TABLE 4 <br /> GROUNDWATER ANALYTICAL RESULTS <br /> TOMS SIERRA BULK PLANT <br /> 335 Railroad Avenue, Grass Valley, California <br /> (All results in parts-per-billion) r <br /> Monitoring Date Total Petroleum Total Aromatic Volatile Organics MTBE <br /> Well Collected Hydrocarbons Oil & ', <br /> as Gasoline as Diesel as Motor Oil as Kerosene Grease Benzene Toluene Ethyl- Total 8020 <br /> benzene Xylenes <br /> MW-1 5/27/93 60 <50" --- --- <0.5 <0.5 --- --- --- <br /> 9/23/94 <50 <50 --- --- <0.5 <0.5 " --- --- --- --- <br /> 2/23/95 160 1501 --- --- <0.5 0.66 <0.5 1.5 <0.5 --- <br /> 5/22/95 150 160; --- --- <0.5 1.1 <0.5 2.0 <0.5 --- <br /> abandoned <br /> MW-2 5/27/93 570 840i! --- --- <0.5 <0.5 --- --- --- <br /> 9/23/94 260 <50J :-- --- <0.5 1.3 --- --- --- --- <br /> 2/23/95 1,000 790" --- <0.5 33 1.2 10 5.9 <br /> 5/22/95 1,200 490 --- --- <0.5 50 2.1 8.7 2.7 --- <br /> 10/11/95 360 1,000 --- --- --- 1.1 0.87 1.2 2.8 --- <br /> 3/6/96 69 460`, --- --- --- <0.3 '<0.3 <0.3 1.2 --- <br /> 5/28/96 750 <50 --- --- <5000 4.7 3.4 1.1 2.7 --- <br /> 9/12/96 280 <50' --- --- --- 1.0 <0.5 <0.5 0.89 140 <br /> 12/11/96 600 <50,E --- --- --- 8.1 0.71 1.7 3.5 38 <br /> 3/20/97 --- --- --- --- --- --- --- --- --- --- <br /> 6/26/97 <50 <50, --- --- <0.50 <0.50 <0.50 <0.50 31.0 1 <br /> 9/11/97** <50 <50' --- --- --- . 2.3 0.60 0.59 <0.60 120 <br /> ti <br /> APEX ENVIROTECH,INC. <br /> THIRD QUARTER 1997 <br /> Page 1 of 6 TOM01.018 <br />