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HISTORICAL SUMMARY OF ANALYTICAL RESULTS <br />UNSATURATED ZONE SOIL GAS <br />FOOTHILL SANITARY LANDFILL <br />SGA 0 <br />Sample Type: Air <br />Sampling Date 10/1/03 2/11/04 5/7/04 7/22/04 11/17/04 2/14/05 10/3/05 6/30/06 11/29/06 3/13/07 8/20/07 <br />Monitoring and Field Parameters <br />Methane Concentration (percent) <br /><0.5 <br /><0.5 <br />0 <br />0 <br />0 <br />0 <br />0 <br />0 <br />0 <br />Carbon Dioxide (percent) <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />1.2 <br />4.5 3.4 <br />Oxygen (percent) <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />10.6 <br />4.5 11.5 <br />Volatile Organic Compounds PPB (v/v) <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 /><U.5 <br /><U.5 <br /><u.b <br />Freon 12 <br /><0.5 <br />660 <br />155 <br />757 <br />155 <br />429 <br />458 <br />460 <br />420 <br />570 <br />120 <br />Freon 114 <br /><0.5 <br />110 <br />26 <br />162 <br />27 <br />80 <br />103 <br /><0.5 <br />89 <br />110 <br />27 <br />Chloromethane <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><).5 <br /><U.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 /><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 />NT <br />Bromomethane <br /><0.5 <br /><0.5 <br /><0.5 <br /><U.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br />Inrnat ana <br /><0.5 <br />< .5 <br /><0.5 <br /><0.5 <br />< .5 <br /><0.5 <br />G.5 <br /><0.5 <br /><G. <br /><0.5 <br /><0.5 <br />Freon 11 <br />Ethanol <br />Freon 113 <br /><0.5 22 8.1 33 5.2 15 13 1z I s 'IV o.4 <br />NT NT NT NT NT NT NT NT NT NT NT <br /><0.5 2.1 <0.5 2.5 <0.5 <0.5 <0.5 <0.5 <0.5 <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 /><U.5 <br /><U.5 <br /><u.b <br />Acetone <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 /><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 />NT <br />Carbon Disulfide <br />NT <br />NT <br />NT <br />NT <br />NT <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br />10 <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 />NT <br />Methylene Chloride <br />6.5 <br />1.1* <br /><1.0 <br /><1.0 <br /><1.0 <br /><1.0 <br /><1.0 <br /><1.0 <br /><1.0 <br />3.5 <br /><1.0 <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 />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 /><1.0 <br />1_rlinhlnrnot ano <br />< _5 <br /><0,5 <br />GQ,S <br /><Q, rj <br /><Q,5 <br /><0. 5 <br />< .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 />NT <br />NT <br /><0.5 <br /><U.5 <br /><u.5 <br /><u.5 <br /><u.o <br />L.4 <br />cls-1.2-Dlc oroethene <br /><U.5 <br /><U.5 <br /><0.5 <br /><0.5 <br /><0.5 <br />< .5 <br /><0.5 <br /><0.5 <br />8.9 <br /><0.5 <br /><0.5 <br />Tetra ydro uran <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><U.5 <br /><U.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 /><0.5 <br />1 1_Tnc nrnat anP <br /><0.5 <br /><0,5 <br /><0.5 <br />< .5 <br /><0.5 <br /><0.5 <br />< .5 <br />__ <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br />