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HISTORICAL SUMMARY OF ANALYTICAL RESULTS <br />UNSATURATED ZONE SOIL GAS <br />FOOTHILL SANITARY LANDFILL <br />Sample Type: Air SG -1 <br />Sampling Date 10/1/03 2/11/04 5/6/04 7/21/04 11/15/04 2/11/05 10/3/05 6/30/06 11/29/06 3/13/07 8/20/07 <br />Monitoring and Field Parameters <br />memane concentration (percent) <br />Carbon Dioxide (percent) <br />Oxygen (percent) <br />Volatile Organic Compounds PPB (v/v) <br />Freon 12 <br />Freon 114 <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 />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />0 <br />0.9 <br />0.1 <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 />NT <br />NT <br />NT <br />Bromomethane <br /><0,5 <br /><0.5 <br /><0.5 <br />-<0.5<0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><O.5 <br /><0.5 <br />Chloroethane <br /><0.5 <br />5.8 <br />205 <br /><0.5 <br />204 <br />369 <br />173 <br />18.4 <br />39 <br />307 <br />269 <br />380 <br />256 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><u.5 1.4 12 27 24 28 <0.5 <0.5 <0.5 <0.5 <n ti <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<0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><O.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 /><0.5 <br /><0.5 <br />2.0 <br />2.7 <br />2.8 <br />5.1 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br />Ethanol <br />NTNT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <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 />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />_ <br />NT <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 />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 />_ <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 />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 />cis- 1, 2-Dichloroethene <br /><0,5 <br /><0.5 <br /><0.5 <br /><0.5 <br />2.0 <br />2 <br /><0.5 <br /><0.5 <br />2.9 <br /><0.5 <br /><0.5 <br />Tetrahydrofuran <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 />