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HISTORICAL SUMMARY OF ANALYTICAL RESULTS <br />UNSATURATED ZONE AIR <br />NORTH COUNTY SANITARY LANDFILL <br />SG -3 Deep <br />Sample Type: Air <br />Sampling Date 1/29/10 9/3/10 1/25/11 7/28/11 4/12/12 8/7/12 1/28/13 8/2/13 <br />Monitoring and Field Parameters <br />Methane oncentration (percent) 0 0 0 0 0 0 0 0 <br />Carbon Dioxide (percent) 2.1 1.3 1.4 1.5 1.6 0.2 0.2 0.2 <br />Oxygen (percent) <br />16.9 <br />16.5 <br />16.3 <br />16.1 <br />16.4 <br />20.8 <br />20.5 <br />20.8 <br />Volatile Organic Compounds PPB (v/v) <br />Freon 12 (Dichlorodifluoromethane) <br />1.2 <br /><1.2 <br />1.1 <br /><1.2 <br />0.93 <br /><0.76 <br /><1.2 <br />2 <br />Freon 114 (1,2-Dichloro-1,1 2,2-Tetrafli <br /><1.1 <br /><1.2 <br /><1.1 <br /><1.2 <br /><0.74 <br /><0.76 <br /><1.2 <br /><1.1 <br />Chloromethane <br /><4.3 <br /><4.8 <br /><4.4 <br /><4.9 <br /><2.9 <br /><3.0 <br /><12.0 <br /><11 <br />Vinyl Chloride <br /><1.1 <br /><1.2 <br /><1.1 <br /><1.2 <br /><0.74 <br /><0.76 <br /><1.2 <br /><1.1 <br />1,3 -Butadiene <br /><1.1 <br /><1.2 <br /><1.1 <br /><1.2 <br /><0.74 <br /><0.76 <br /><1.2 <br /><1.1 <br />Bromomethane <br /><1.1 <br /><1.2 <br /><1.1 <br /><1.2 <br /><0.74 <br /><7.6 <br /><12.0 <br /><11 <br />Chloroethane <br /><1.1 <br /><1.2 <br /><1.1 <br /><1.2 <br /><0.74 <br /><3.0 <br /><4.8 <br /><4.3 <br />Freon 11 (Trichlorofluoromethane) <br /><1.1 <br /><1.2 <br /><1.1 <br /><1.2 <br /><0.74 <br /><0.76 <br /><1.2 <br />1.1 <br />Ethanol <br /><4.3 <br />21 <br />4.4 <br />400 <br /><2.9 <br />240 <br /><4.8 <br />22 <br />Freon 113 <br /><1.1 <br /><1.2 <br /><1.1 <br /><1.2 <br /><0.74 <br /><0.76 <br /><1.2 <br /><1.1 <br />1,1 Dichloroethene (1 1-Dichloroethylei <br /><1 1 <br /><1.2 <br /><1.1 <br /><1.2 <br /><0.74 <br /><0.76 <br /><1.2 <br /><1.1 <br />Acetone <br /><4.3 <br />9.6 <br />4.4 <br />12 <br />14 <br />8.4 <br /><12.0 <br />14 <br />2 -Propanol <br /><4.3 <br /><4.8 <br /><4.4 <br /><4.9 <br /><2.9 <br /><3.0 <br /><4.8 <br /><4.3 <br />Carbon Disulfide <br /><1.1 <br /><1.2 <br /><1.1 <br /><4.9 <br /><2.9 <br /><3.0 <br /><4.8 <br /><4.3 <br />3-Chloropropene <br /><4.3 <br /><4.8 <br /><4.4 <br /><4.9 <br /><2.9 <br /><3.0 <br /><4.8 <br /><4.3 <br />Methylene Chloride <br /><1.1 <br /><1.2 <br /><1.1 <br /><1.2 <br /><0.74 <br /><7.6 <br /><12.0 <br /><11 <br />Methyl tert-butyl ether <br /><1.1 <br /><1.2 <br /><1.1 <br /><1.2 <br /><0.74 <br /><0.76 <br /><1.2 <br /><1.1 <br />trans- 1,2-dichloroethene <br /><1.1 <br /><1.2 <br /><1.1 <br /><1.2 <br /><0.74 <br /><0.76 <br /><1.2 <br /><1.1 <br />Hexane <br /><1.1 <br /><1.2 <br /><1.1 <br /><1.2 <br /><0.74 <br /><0.76 <br /><1.2 <br /><1.1 <br />1,1-Dichloroethane <br /><1.1 <br /><1.2 <br /><1.1 <br /><1.2 <br /><0.74 <br /><0.76 <br /><1.2 <br /><1.1 <br />2-butanone (Methyl Ethyl Ketone) <br /><1.1 <br />1.3 <br /><1.1 <br /><4.9 <br /><2.9 <br /><3.0 <br /><4.8 <br /><4.3 <br />cis-1,2-Dichloroethene <br /><1.1 <br /><1.2 <br /><1.1 <br /><1.2 <br /><0.74 <br /><0.76 <br /><1.2 <br /><1.1 <br />Tetrahydrofuran <br /><1.1 <br /><1.2 <br /><1.1 <br /><1.2 <br /><0.74 <br />0.93 <br /><1.2 <br /><1.1 <br />Chloroform <br /><1.1 <br /><1.2 <br /><1.1 <br /><1.2 <br /><0.74 <br /><0.76 <br /><1.2 <br /><1.1 <br />1,1,1 -Trichloroethane <br /><1.1 <br /><1.2 <br /><1.1 <br /><1.2 <br /><0.74 <br /><0.76 <br /><1.2 <br /><1.1 <br />Cyclohexane <br /><1.1 <br /><1.2 <br /><1.1 <br /><1.2 <br /><0.74 <br /><0.76 <br /><1.2 <br /><1.1 <br />Carbon Tetrachloride <br /><1.1 <br /><1.2 <br /><1.1 <br /><1.2 <br /><0.74 <br /><0.76 <br /><1.2 <br /><1.1 <br />2,2,4-Trimethylpentane <br /><1.1 <br /><1.2 <br /><1.1 <br /><1.2 <br /><0.74 <br /><0.76 <br /><1.2 <br /><1.1 <br />Benzene <br /><1.1 <br /><1.2 <br /><1.1 <br /><1.2 <br /><0.74 <br /><0.76 <br /><1.2 <br /><1.1 <br />1,2-Dichloroethane <br /><1.1 <br /><1.2 <br /><1.1 <br /><1.2 <br /><0.74 <br /><0.76 <br /><1.2 <br /><1.1 <br />Heptane <br /><1.1 <br /><1.2 <br /><1.1 <br /><1.2 <br /><0.74 <br /><0.76 <br /><1.2 <br /><1.1 <br />