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Sample Type: Air <br />Sampling Date <br />7/28/08 <br />HISTORICAL SUMMARY OF ANALYTICAL RESULTS <br />UNSATURATED ZONE AIR <br />NORTH COUNTY SANITARY LANDFILL <br />SG -1 Deep <br />1/30/09 7/14/09 1/29/10 9/3/10 1/25/11 7/28/11 <br />4/12/12 <br />8/7/12 <br />1/28/13 <br />Monitoring and Field Parameters <br />Methane Concentration (percent) <br />0 <br />0 <br />0 <br />0 <br />0 <br />0 <br />0 <br />0 <br />0 <br />0.0 <br />Carbon Dioxide (percent) <br />1.3 <br />1.6 <br />1.4 <br />1.6 <br />18.2 <br />0.9 <br />1.9 <br />0.6 <br />1.7 <br />0 <br />Oxygen (percent) <br />. 16.2 <br />16.5 <br />17.2 <br />17.6 <br />1.1 <br />17.5 <br />14.8 <br />17.8 <br />16.8 <br />20.6 <br />Volatile Organic Compounds PPB (v/v <br />Freon 12 (Dichlorodifluoromethane) <br />1.7 <br />2 <br />5.9 <br />5.6 <br />5.4 <br />3.4 <br />5.8 <br />2.4 <br />7.3 <br /><1.1 <br />Freon 114 (1,2-Dichloro-1,1,2,2-Tetr< <br /><1.2 <br /><1.1 <br /><1.5 <br /><1.2 <br /><1.1 <br /><1.1 <br /><1.2 <br /><0.71 <br /><0.86 <br /><1.1 <br />Chloromethane <br /><4.8 <br /><4.3 <br /><6.0 <br /><4.8 <br />5.4 <br /><4.5 <br /><4.7 <br /><2.8 <br /><3.4 <br /><11 <br />Vinyl Chloride <br /><1.2 <br /><1.1 <br /><1.5 <br /><1.2 <br /><1.1 <br /><1.1 <br /><1.2 <br /><0.71 <br /><0.86 <br /><1.1 <br />1,3 -Butadiene <br /><1.2 <br /><1.1 <br /><1.5 <br /><1.2 <br /><1.1 <br /><1.1 <br /><1.2 <br /><0.71 <br /><0.86 <br /><1A <br />Bromomethane <br /><1.2 <br /><1.1 <br /><1.5 <br /><1.2 <br /><1.1 <br /><1.1 <br /><1.2 <br /><0.71 <br /><8.6 <br /><11 <br />Chloroethane <br /><1.2 <br /><1.1 <br /><1.5 <br /><1.2 <br /><1.1 <br /><1.1 <br /><1.2 <br /><2.8 <br /><3.4 <br /><4.6 <br />Freon 11 (Trichlorofluoromethane) <br /><1.2 <br />1.2 <br />3.7 <br />3.2 <br />2.8 <br />1.8 <br />2.7 <br />1.4 <br />3.5 <br /><1.1 <br />Ethanol <br /><4.8 <br />4.4 <br /><6.0 <br /><4.8 <br />8.9 <br />42 <br />270 <br /><2.8 <br />220 <br /><4.6 <br />Freon 113 <br /><1.2 <br /><1.1 <br /><1.5 <br /><1.2 <br /><1.1 <br /><1.1 <br /><1.1 <br /><0.71 <br /><0.86 <br /><1.1 <br />1,1-Dichloroethene (1,1-Dichloroethy <br /><1.2 <br /><1.1 <br /><1.5 <br /><1.2 <br /><1.1 <br /><1.1 <br /><1.2 <br /><0.71 <br /><0.86 <br /><1.1 <br />Acetone <br />5.7 <br /><4.3 <br />29 <br /><4.8 <br />18 <br /><4.5 <br />14 <br />13 <br /><8.6 <br /><11 <br />_ 2 -Propanol <br /><4.8 <br /><4.3 <br /><6.0 <br /><4.8 <br /><4.3 <br /><4.5 <br /><4.5 <br /><2.8 <br /><3.4 <br /><4.6 <br />Carbon Disulfide <br /><1.2 <br /><1.1 <br /><1.5 <br /><1.2 <br /><1.1 <br /><1.1 <br /><4.7 <br /><2.8 <br /><3.4 <br /><4.6 <br />3-Chloropropene <br /><4.8 <br /><4.3 <br /><6.0 <br /><4.8. <br /><4.3 <br /><4.5 <br /><4.7 <br /><2.8 <br /><3.4 <br /><4.6 <br />Methylene Chloride <br /><1.2 <br /><1.1 <br /><1.5 <br /><1.2 <br /><1.1 <br /><1.1 <br /><1.2 <br /><0.71 <br /><8.6 <br /><11 <br />Methyl tert-butyl ether <br /><1.2 <br /><1.1 <br /><1.5 <br /><1.2 <br /><1.1 <br /><1.1 <br /><1.2 <br /><0.71 <br /><0.86 <br /><1.1 <br />trans-1,2-dichloroethene <br /><1.2 <br /><1.1 <br /><1.5 <br /><1.2 <br /><1.1 <br /><1.1 <br /><1.2 <br /><0.71 <br /><0.86 <br /><1.1 <br />Hexane <br /><1.2 <br /><1.1 <br /><1.5 <br /><1.2 <br /><1.1 <br /><1.1 <br /><1.2 <br /><0.71 <br /><0.86 <br /><1.1 <br />1,1-Dichloroethane <br /><1.2 <br /><1.1 <br /><1.5 <br /><1.2 <br /><1.1 <br /><1.1 <br /><1.2 <br /><0.71 <br /><0.86 <br /><1.1 <br />2-butanone <br /><1.2 <br />1.4 <br />10 <br /><1.2 <br />2.6 <br /><1.1 <br /><4.7 <br /><2.8 <br /><3.4 <br /><4.6 <br />cis-1,2-Dichloroethene <br /><1.2 <br /><1.1 <br /><1.5 <br /><1.2 <br /><1.1 <br /><1.1 <br /><1.2 <br /><0.71 <br /><0.86 <br /><1.1 <br />Tetrahydrofuran <br /><1.2 <br /><1.1 <br /><1.5 <br /><1.2 <br /><1.1 <br /><1.1 <br /><1.2 <br /><0.71 <br /><0.86 <br /><1.1 <br />Chloroform <br /><1.2 <br /><1.1 <br /><1.5 <br /><1.2 <br /><1.1 <br /><1.1 <br /><1.2 <br /><0.71 <br /><0.86 <br /><1.1 <br />1,1,1 -Trichloroethane <br /><1.2 <br /><1.1 <br /><1.5 <br /><1.2 <br /><1.1 <br /><1.1 <br /><1.2 <br /><0.71 <br /><0.86 <br /><1.1 <br />Cyclohexane <br /><1.2 <br /><1.1 <br /><1.5 <br /><1.2 <br /><1.1 <br /><1.1 <br /><1.2 <br /><0.71 <br /><0.86 <br /><1.1 <br />