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0 ® • <br />HISTORICAL SUMMARY OF ANALYTICAL RESULTS <br />UNSATURATED ZONE SOIL GAS <br />FOOTHILL SANITARY LANDFILL <br />SG -1 <br />Sample Type: Air <br />Sampling Date <br />10/1/03 <br />2/11/04 <br />5/6/04 <br />7/21/04 <br />11/15/04 <br />2/11/05 <br />10/3/05 <br />6/30/06 <br />11/29/06 <br />3/13/07 <br />8/20/07 <br />Monitoring and Field Parameters <br />Methane Concentration (percent) <br />NR <br />0 <br />0 <br />0 <br />0.2 <br />0.1 <br />0.4 <br />0 <br />0 <br />0.1 <br />0.4 <br />Carbon Dioxide (percent) <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />0 <br />0.9 <br />0.1 <br />Oxygen (percent) <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />20.6 <br />19.9 <br />18.5 <br />Volatile Organic Compounds PPB (v/v) <br />Freon 12 <br />Freon 114 <br />173 <br /><0.5 <br />18.4 <br />1.4 <br />39 <br />12 <br />307 <br />27 <br />269 <br />24 <br />380 <br />28 <br />256 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br />Chloromethane <br /><0.5 <br />2.7 <br />49 <br /><0.5 <br />50 <br />86 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br />Vinyl Chloride <br />316 <br />22 <br />764 <br />1.1 <br />662 <br />796 <br />1368 <br />610 <br /><0.5 <br /><0.5 <br />320 <br />1,3 -Butadiene <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />Bromomethane <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br />Chloroethane <br /><0.5 <br />5.8 <br />205 <br /><0.5 <br />204 <br />369 <br />448 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br />Freon 11 <br />Ethanol <br /><0.5 <br />NT <br /><0.5 <br />NT <br />2.0 <br />NT <br />2.7 <br />NT <br />2.8 <br />NT <br />5.1 <br />NT <br /><0.5 <br />NT <br /><0.5 <br />NT <br /><0.5 <br />NT <br /><0.5 <br />NT <br /><0.5 <br />NT <br />Freon 113 <br />NT <br />NT <br />NT <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br />1,1-Dichloroethene <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br />Acetone <br />NT <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br />2 -Propanol <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />Carbon Disulfide <br />NT <br />NT <br />NT <br />NT <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br />3-Chloropropene <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />Methylene Chloride <br />308 <br />1.6* <br />1.2 <br />1.5 <br />2.9 <br />1.7 <br /><1.0 <br /><1.0 <br /><1.0 <br /><0.5 <br /><0.5 <br />Methyl tert-butyl ether <br />trans-1,2-Dichloroethene <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />Hexane <br /><1.0 <br /><1.0 <br /><1.0 <br /><1.0 <br /><1.0 <br /><1.0 <br /><1.0 <br /><1.0 <br /><1.0 <br /><1.0 <br /><1.0 <br />1,1-Dichloroethane <br /><0.5 <br /><0.5 <br />6.3 <br /><0.5 <br />4.7 <br />8.3 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br />2-Butanone (Methyl Ethyl Ketone) <br />cis-1,2-Dichloroethene <br />NT <br /><0.5 <br />NT <br /><0.5 <br />NT <br /><0.5 <br />NT <br /><0.5 <br /><0.5 <br />2.0 <br /><0.5 <br />2 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br />2.9 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br />Tetrahvdrofuran <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br />