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9 0 0 <br />HISTORICAL SUMMARY OF ANALYTICAL RESULTS <br />UNSATURATED ZONE SOIL GAS <br />FOOTHILL SANITARY LANDFILL <br />SGA 1 <br />Sample Type: Air <br />Sampling Date 1/29/08 7/29/08 1/22/09 7/15/09 3/2/10 9/3/10 1/25/11 7/29/11 4/12/12 8/7/12 <br />Monitoring and Field Parameters <br />Volatile Organic Compounds PPB (v/v) <br />Freon 12 <br />440 <br />420 <br />1300 <br />790 <br />650 <br />210 <br />350 <br />230 <br />620 <br />240 <br />Freon 114 <br />130 <br />180 <br />370 <br />230 <br />180 <br />75 <br />110 <br />81 <br />190 <br />79 <br />Chloromethane <br /><0.5 <br /><8.8 <br /><19 <br /><12 <br /><8.8 <br /><4.4 <br /><4.1 <br /><4.8 <br /><23 <br /><3.2 <br />Vinyl Chloride <br /><0.5 <br />39 <br />120 <br />54 <br />3.1 <br /><1.1 <br /><1.0 <br />9.2 <br />21 <br /><0.79 <br />1,3 -Butadiene <br />NT <br /><2.2 <br /><4.7 <br /><2.9 <br /><2.2 <br /><1.1 <br /><1.0 <br /><1.2 <br /><2.3 <br /><0.79 <br />Bromomethane <br /><0.5 <br /><2.2 <br /><4.7 <br /><2.9 <br /><2.2 <br /><1.1 <br /><1.0 <br /><1.2 <br /><23 <br /><7.9 <br />Chloroethane <br /><0.5 <br /><2.2 <br /><4.7 <br /><2.9 <br /><2.2 <br /><1.1 <br /><1.0 <br /><4.8 <br /><9.2 <br /><3.2 <br />Freon 11 <br />4.1 <br />2.3 <br />8.5 <br />4.7 <br />6.2 <br />1.4 <br />2.6 <br />1.7 <br />4.4 <br />1.8 <br />Ethanol <br /><4.6 <br /><8.8 <br /><19 <br /><12 <br /><8.8 <br />7.0 <br />8.0 <br />100 <br /><9.2 <br /><3.2 <br />Freon 113 <br /><0.5 <br /><2.2 <br /><4.7 <br /><2.9 <br /><2.2 <br /><1.1 <br /><1.0 <br /><1.2 <br /><2.3 <br /><0.79 <br />1,1-Dichloroethene <br />7 <br />30 <br />82 <br />45 <br />9.1 <br /><1.1 <br /><1.0 <br />9.0 <br />24 <br /><0.79 <br />Acetone <br /><0.5 <br />18 <br /><19 <br /><12 <br /><8.8 <br />9 <br /><4.1 <br /><4.8 <br /><23 <br /><7.9 <br />2 -Propanol <br /><4.6 <br /><8.8 <br /><19 <br /><12 <br /><8.8 <br /><4.4 <br /><4.1 <br /><4.8 <br /><9.2 <br /><3.2 <br />Carbon Disulfide <br /><0.5 <br /><2.2 <br /><4.7 <br /><2.9 <br /><2.2 <br />1.9 <br /><1.0 <br /><4.8 <br /><9.2 <br /><3.2 <br />3-Chloropropene <br />NT <br /><8.8 <br /><19 <br /><12 <br /><8.8 <br /><4.4 <br /><4.1 <br /><4.8 <br /><9.2 <br /><3.2 <br />Methylene Chloride <br /><1.0 <br /><2.2 <br /><4.7 <br /><2.9 <br /><2.2 <br /><1.1 <br /><1.0 <br /><1.2 <br /><23 <br /><7.9 <br />Methyl tert-butyl ether <br />NT <br /><2.2 <br /><4.7 <br /><2.9 <br /><2.2 <br /><1.1 <br /><1.0 <br /><1.2 <br /><2.3 <br /><0.79 <br />trans- 1,2-Dichloroethene <br />NT <br /><2.2 <br /><4.7 <br /><2.9 <br /><2.2 <br /><1.1 <br /><1.0 <br /><1.2 <br /><2.3 <br /><0.79 <br />_ <br />Hexane <br /><1.0 <br />6.4 <br />14 <br />7.1 <br />2.2 <br /><1.1 <br /><1.0 <br />1.2 <br />3.5 <br /><0.79 <br />1,1-Dichloroethane <br /><0.5 <br /><2.2 <br /><4.7 <br /><2.9 <br /><2.2 <br /><1.1 <br /><1.0 <br /><1.2 <br /><2.3 <br /><0.79 <br />2-Butanone (Methyl Ethyl Ketone) <br />3.5 <br />6.1 <br /><4.7 <br /><2.9 <br /><2.2 <br />1.4 <br /><1.0 <br /><4.8 <br /><9.2 <br /><3.2 <br />cis-1,2-Dichloroethene <br /><0.5 <br /><2.2 <br /><4.7 <br /><2.9 <br /><2.2 <br /><1.1 <br /><1.0 <br /><1.2 <br /><2.3 <br /><0.79 <br />Tetrahydrofuran <br />64 <br /><2.2 <br /><4.7 <br /><2.9 <br /><2.2 <br /><1.1 <br /><1.0 <br /><1.2 <br /><2.3 <br /><0.79 <br />Chloroform <br /><0.5 <br /><2.2 <br /><4.7 <br /><2.9 <br /><2.2 <br /><1.1 <br /><1.0 <br /><1.2 <br /><2.3 <br /><0.79 <br />1,1,1 -Trichloroethane <br /><0.5 <br /><2.2 <br /><4.7 <br /><2.9 <br /><2.2 <br /><1.1 <br /><1.0 <br /><1.2 <br /><2.3 <br /><0.79 <br />Cvclohexane <br />3.5 <br />10 <br />14 <br />8.3 <br /><2.2 <br /><1.1 <br /><1.0 <br />1.3 <br />3.5 <br /><0.79 <br />