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HISTORICAL SUMMARY OF ANALYTICAL RESULTS <br />UNSATURATED ZONE SOIL GAS <br />FOOTHILL SANITARY LANDFILL <br />SG -4 <br />Sample Type: Air <br />Sampling Date 10/1/03 2/11/04 5/6/04 7/22/04 11/15/04 2/14/05 10/3/05 6/30/06 11/29/06 3/13/07 <br />Monitoring and Field Parameters <br />Volatile Organic Compounds PPB (v/v) <br />Freon 12 <br />Freon 114 <br />92 <br /><0.5 <br />277 <br />23 <br />329 <br />34 <br />649 <br />96 <br />145 <br />15 <br />361 <br />33 <br />126 <br />15 <br />380 <br /><0.5 <br />126 <br />6.6 <br />160 <br />21 <br />Chloromethane <br />6.0 <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 />Vinyl ori e <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 />1,3 -Butadiene <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 />Chloroethane <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 />Freon 11 <br />Ethanol <br />Freon 113 <br />1,1-Dichloroethene <br />41 <br />NT <br />2.6 <br /><0.5 <br />123 <br />NT <br />8.2 <br /><0.5 <br />174 <br />NT <br />16 <br /><0.5 <br />225 <br />NT <br />29 <br /><0.5 <br />61 <br />NT <br />4.3 <br /><0.5 <br />137 <br />NT <br />9.2 <br /><0.5 <br />37 <br />NT <br />2.8 <br /><0.5 <br />130 <br />NT <br /><0.5 <br /><0.5 <br />16 <br />NT <br />2.8 <br /><0.5 <br />56 <br />NT <br />3 <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 />2 -Propanol <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 /><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 />Methylene Chloride <br /><1.0 <br />2.5 <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 />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 />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 />-Dic oroethane <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-Butanone (Methyl Ethyl Ketone) <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-Dim-or�oethene <br /><0.5 <br />< .5 <br /><0.5 <br /><0.5 ----<-0-.5 <br /><0.5 <br /><0.5 <br /><0.5 <br />5.7 <br /><0.5 <br />etrahy ro uran <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 />Chloroform <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 />1. 1.1 -Trichloroethane <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 />