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Sample Type: Air <br />Sampling Date <br />7/22/04 <br />HISTORICAL SUMMARY OF ANALYTICAL RESULTS <br />UNSATURATED ZONE SOIL GAS <br />FOOTHILL SANITARY LANDFILL <br />SG -121 <br />2/14/05 10/3/05 11/17/06 3/13/07 8/20/07 1/29/08 <br />7/29/08 <br />1/23/09 <br />7/15/09 <br />3/2/10 <br />Monitoring and Field Parameters <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 />Acetone <br /><0.5 <br /><0.5 <br /><0.5 <br />Met ane Concentration (percent) <br />0 <br />0 <br />0 0 0 0 <br />0 <br />0 <br />0 <br />NT <br />2 -Propanol <br />Carbon Dioxide (percent) <br />NT <br />NT <br />NT NT 0.5 0.2 <br />0 <br />0 <br />0 <br />NT <br />0.7 <br />Oxygen (percent) <br />NT <br />NT <br />NT NT 20.8 20.3 <br />20.6 <br />19.7 <br />20.1 <br />NT <br />20.6 <br />Volatile Organic Compounds PPB (v/v) <br />Freon 12 <br />Freon 114 <br />0.9 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <0.5 NT NT <br /><0.5 <0.5 NT NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />Chloromethane <br /><0.5 <br /><0.5 <br /><0.5 <0.5 NT NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />Vinyl Chloride <br /><0.5 <br /><0.5 <br /><0.5 <0.5 NT NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />1,3 -Butadiene <br />NT <br />NT <br />NT NT NT NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />Bromomethane <br /><0.5 <br /><0.5 <br /><0.5 <0.5 NT NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />Chloroethane <br />1 <br /><0.5 . <br /><0.5 <0.5 NT NT <br />NT <br />NT <br />NT <br />NT <br />N1 --- <br />Freon 11 <br />Ethanol <br />Freon 113 <br />1,1-Dichloroethene <br /><0.5 <br />NT <br /><0.5 <br /><0.5 <br /><0.5 <br />NT <br /><0.5 <br /><0.5 <br /><0.5 <br />NT <br /><0.5 <br /><0.5 <br /><0.5 <br />NT <br /><0.5 <br /><0.5 <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 />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />Acetone <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <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 /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <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 />< <br /><1.0 <br />28 <br />1.3 <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <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 />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />1, -Dich oroethane <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />2-Butanone (Methyl Ethyl Ketone) <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />cis-1.2-Dichloroethene <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />N <br />1.1.1 -Trichloroethane 1.3 <0.5 <0.5 <0.5 NT NT NT NT NT NT NT <br />