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r Ml M MM r w r Ml MM tr sr r MM M M M <br />HISTORICAL SUMMARY OF ANALYTICAL RESULTS <br />UNSATURATED ZONE SOIL GAS <br />FOOTHILL SANITARY LANDFILL <br />SG -121 <br />Sample Type: Air <br />Sampling Date 7/22/04 2/14/05 10/3/05 11/17/06 3/13/07 8/20/07 1/29/08 <br />Monitoring and Field Parameters <br />Methane Conc <br />on <br />Volatile Organic Compounds PPB (v/v <br />Acetone <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br />NT <br />NT <br />NT <br />Benzene <br /><1.0 <br /><1.0 <br /><1.0 <br /><1.0 <br />NT <br />NT <br />NT <br />Benzyl Chloride <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br />NT <br />NT <br />NT <br />Bromomethane <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <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 />Carbon Tetrachloride <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br />NT <br />NTNT <br />Chlorobenzene-- - <br /><0.5 <br />-<0.5 <br /><0.5 --- <br /><0.5 -- <br />NT <br />Chloroethane <br />1 <br /><0.5 <br /><0.5 <br /><0.5 <br />_ <br />NT <br />NT <br />NT <br />Chloroform <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br />NT <br />NT <br />_ <br />NT <br />Chloromethane <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br />NT <br />NT <br />NT <br />1,2-Dibromoethane <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br />NT <br />1,2 -Dichlorobenzene <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br />NT <br />NT <br />NT <br />1,3 -Dichlorobenzene <br /><0.5 <br /><0.5 <br /><0.5 <br />NT <br />NT <br />NT <br />1,4 -Dichlorobenzene <br /><0.5 <br /><0.5 <br />_<0.5 <br /><0.5 <br /><0.5 <br />NT <br />NT <br />NT <br />Dichlorodifluoromethane <br />0.9 <br /><0.5 <br /><0.5 <br /><0.5 <br />NT <br />NT <br />_ <br />NT <br />1, 1 -Dichloroethane <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br />_ <br />NT <br />NT <br />NT <br />1,2-Dichloroethane <br /><1.0 <br /><1.0 <br /><1.0 <br /><1.0 <br />NT <br />NT <br />NT <br />1,2-Dichloro 1,1,2,2-Tetrafluoroethane <br /><0.5 <br />-<0.5 <br />-<0.5 <br /><0.5 <br />NT <br />NT <br />_ <br />NT <br />1,1-Dichloroethylene <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <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 />_ <br />NT <br />1,2-Dichloropropane <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br />NT <br />NT <br />NT <br />cis-1,3-Dichloropropene <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br />NT <br />_ <br />NT <br />NT <br />trans- 1,3-Dichloropropene <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br />NT <br />NT <br />NT <br />Ethylbenzene <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br />NT <br />NT <br />NT <br />Freon 113 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br />NT <br />NT <br />NT <br />Hexachlorobutadiene <br /><1.0 <br /><1.0 <br /><1.0 <br /><1.0 <br />NT <br />NT <br />NT <br />