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HISTORICAL SUMMARY OF ANALYTICAL RESULTS <br />UNSATURATED ZONE SOIL GAS <br />FOOTHILL SANITARY LANDFILL <br />Sample Type: Air <br />SG -12D <br />Sampling Date 7/22/04 2/14/05 10/3/05 11/17/06 3/13/07 8/20/07 1/29/08 7/29/08 1/23/09 7/15/09 3/2/10 <br />Monitoring and Field Parameters <br />Volatile Organic Compounds PPB (v/v) <br />6.4 <br /><0.5 <br /><0.5 <br /><0.5 <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />Freon 12 <br />6.9 <br /><0.5 <br /><0.5 <br /><0.5 <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />Freon 114 <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 />Chloromethane <br /><0.5 <br /><0.5 <br />-<0.5<0.5 <br /><0.5 <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />Vinyl Chloride <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 />1,3 -Butadiene <br />NT <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 />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />Chloroethane <br />3.4 <br /><0.5 <br /><0.5 <br /><0.5 <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />rreon _i l <br />6.4 <br /><0.5 <br /><0.5 <br /><0.5 <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />Ethanol <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <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 />NT <br />NT <br />NT <br />NT <br />1,1-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 />NT <br />Hcetone <0.5 <0.5 <0.5 <0.5 NT NT NT NT NT NT NT <br />2 -Propanol NT NT NT NT NT NT NT NT NT NT NT <br />Carbon Disulfide <0.5 <0.5 <0.5 <0.5 NT NT NT NT NT NT 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 />1.6 <br /><1.0 <br /><1.0 <br />3.4 <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <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 />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 />NT <br />riexane <1,0 <1.0 <1.0 <1.0 NT NT NT NT NT NT NT <br />1,1-Dichloroethane <0.5 <0.5 <0.5 <0.5 NT NT NT NT NT NT_ NT <br />2-Butanone (Methyl Ethyl Ketone) NT NT NT NT NT NT NT NT NT NT NT <br />aru�uaw.o --u.o <u.o <U.5 NI NT NT NT NT NT NT <br />Chloroform <0.5 <0.5 <0.5 <0.5�NTT <br />NT NT NT NT NT NT <br />1,1,1 -Trichloroethane 2.8 <0.5 <0.5 <0.5 NT NT NT NT NT NT <br />0 0 0 <br />