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0 0 0 <br />HISTORICAL SUMMARY OF ANALYTICAL RESULTS <br />UNSATURATED ZONE SOIL GAS <br />FOOTHILL SANITARY LANDFILL <br />SG -8 <br />Sample Type: Air <br />Sampling Date 1/29/08 7/29/08 1/23/09 7/15/09 3/2/10 8/7/12 <br />Monitoring and Field Parameters <br />ne Concentration <br />Volatile Oraanic Compounds PPB (v/v <br />Freon 12 <br />Freon 114 <br />1300 <br /><0.5 <br />260 <br />9.5 <br />1300 <br /><160.0 <br />500 <br />15 <br />440 <br /><58 <br />Chloromethane <br /><0.5 <br /><4.1 <br /><650.0 <br /><6.3 <br /><230 <br />Vinyl hone <br /><0.5 <br />-<1.0 <br /><160.0 <br />< <br /><5 <br />1,3 -Butadiene <br />NT <br />51.0 <br /><160.0 <br /><1.6 <br /><58 <br />Bromomethane <br /><0.5 <br /><1.0 <br /><160.0 <br /><1.6 <br /><58 <br />Chloroethane <br /><0.5 <br /><1.0 <br />< <br /><1.6 <br /><5 <br />Freon 11 <br />Ethanol <br />Freon 113 <br />1,1-Dichloroethene <br />880 <br />NT <br /><0.5 <br /><0.5 <br />220 <br />18 <br />11 <br />13 <br />960 <br /><650.0 <br /><160.0 <br /><160.0 <br />400 <br /><6.3 <br />13 <br /><1.6 <br />430 <br /><230 <br /><58 <br />110 <br />Acetone <br /><0.5 <br />18 <br /><650.0 <br />8 <br /><230 <br />2 -Propanol NT <4.1 <650.0 <6.3 <230 <br />Carbon Disulfide <0.5 <1.0 <160.0 <1.6 <58 <br />3-Chloropropene <br />NT <br /><4.1 <br /><650.0 <br /><6.3 <br /><230 <br />Methylene Chloride <br /><1.0 <br />1.6 <br /><160.0 <br /><1.6 <br /><58 <br />Methyl tert-butyl ether <br />NT <br /><1.0 <br /><160.0 <br /><1.6 <br /><58 <br />trans- 1,2-Dichloroethene <br />NT <br /><1.0 <br /><160.0 <br /><1.6 <br /><58 <br />Hexane <1.0 <1.0 <160.0 <1.6 <58 <br />1,1-Dichloroethane <0.5 <1.0 <160.0 <1.6 <58 <br />2-Butanone (Methyl Ethyl Ketone) NT 3.8 <160.0 <1.6 <58 <br />1,1,1 -Trichloroethane NT <1.0 <160.0 2 <58 <br />NS <br />NS <br />NS <br />NS <br />NS <br />NS <br />NS <br />NS <br />NS <br />NS <br />NS <br />NS <br />NS <br />NS <br />NS <br />NS <br />NS <br />NS <br />NS <br />NS <br />NS <br />NS <br />NS <br />NS <br />NS <br />