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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 />92 <br />277 <br />329 <br />649 <br />145 <br />361 <br />126 <br />380 <br />126 <br />160 <br />Freon 114 <br /><0.5 <br />23 <br />34 <br />96 <br />15 <br />33 <br />15 <br /><0.5 <br />6.6 <br />21 <br />Chloromethane <br />6.0 <br />< .5 <br /><0.5 <br /><0.5 <br /><.5 <br /><0.5 <br />< .5<0.5<0.5 <br />-<o.5<0.5 <br /><0.5 <br />- -V!nyl GfiToride <br /><0.5 <br /><0.5 <br /><0.5 <br />< .5 <br /><0.5 <br />< <br /><U.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 />< .5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br />Freon 11 <br />41 <br />123 <br />174 <br />225 <br />61 <br />137 <br />37 <br />130 <br />16 <br />56 <br />Ethanol <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />Freon 113 <br />2.6 <br />8.2 <br />16 <br />29 <br />4.3 <br />9.2 <br />2.8 <br /><0.5 <br />2.8 <br />3 <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 />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 />_ <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 />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 />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 />---M- ich oroet ane <br /><0.5 <br />< .5 <br /><0. <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br />< .5< <br />.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- loroet iene <br />< .5 <br /><0.5 <br /><0.5 <br /><0.5 <br />< .5 <br /><0.5 <br /><0.5 <br /><0.5 <br />5.7 <br /><0.5 <br />,2-Dic <br />Tetral�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 />< .5 <br /><0.5 <br />- Chloroform <br /><0.5 <br /><0.5 <br />< .5 <br /><0.5 <br /><0.5 <br /><0. <br />< .5 <br /><0.5 <br />< .5 <br /><0.5 <br />-� ,1=Tnchloroet ane <br />< .5 <br /><0.5 <br /><0.5 <br /><0.5 <br />< .5 <br />< .5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br />Cyclohexane <br /><10 <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 />Tetrachloride <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 />_Carbon <br />2,2,4-Trimethylpentane <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 />Benzene <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 />3 <br /><0.5 <br />-1 f fl -o roet hene <br /><0.5 <br /><0.5 <br /><0.5 <br />--0.5<1.0 <br /><1. <br /><1.0 <br /><1. <br /><1 •� <br />0 <br />Heptane <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 />richloroethane <br /><1.0 <br />< .0 <br /><1.0 <br /><1. <br /><1.0 <br />< <br />< .0 <br /><1.0 <br />6.2 <br /><1.0 <br />1,2-Dic oropropane <br /><0.5 <br /><0.5 <br /><0.5 <br /><U.5 <br /><U.5 <br /><U.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br />1,4 -Dioxane <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />