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Sample Type: Air <br />Sampling Date <br />10/1/03 <br />M�mm <br />2/11/04 <br />am MM <br />HISTORICAL SUMMARY OF ANALYTICAL RESULTS <br />UNSATURATED ZONE SOIL GAS <br />FOOTHILL SANITARY LANDFILL <br />SG -9 <br />5/7/04 7/22/04 11/17/04 2/14/05 10/3/05 6/30/06 11/29/06 3/13/07 <br />8/20/07 <br />Monitoring and Field Parameters <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br />4.3 <br />n-butylbenzene <br />NT <br />NT <br />Methane Concentration (percent) <br />NR <br />0 <br />0 <br />0 <br />0 0 0 <br />0 <br />0 <br />0 <br />0 <br />Oxygen (percent) <br />NT <br />NT <br />NT <br />NT <br />NT NT NT <br />NT <br />15.9 <br />20.1 <br />20.3 <br />Carbon Dioxide (percent) <br />NT <br />NT <br />NT <br />NT <br />NT NT NT <br />NT <br />0.3 <br />0.9 <br />0.2 <br />Volatile Organic Compounds PPB (v/v) <br /><0.5 <br /><0.5 <br />Carbon Disulfide <br />NT <br />NT <br />NT <br />NT <br />NT <br /><0.5 <br />Acetone <br />NT <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <0.5 <0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br />6.5 <br />Benzene <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <0.5 <0.5 <br /><0.5 <br />2.1 <br /><0.5 <br /><0.5 <br />Benzyl Chloride <br /><1.0 <br /><1.0 <br /><1.0 <br /><1.0 <br /><1.0 <1.0 <1.0 <br /><1.0 <br /><1.0 <br /><1.0 <br /><1.0 <br />Bromomethane <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <0.5 <0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br />2-butanone <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 />4.3 <br />n-butylbenzene <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 />_ <br /><0.5 <br />sec-butylbenzene <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 />tert-butylbenzene <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 />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 /><0.5 <br />1.5 <br />Carbon 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 /><0.5 <br />Chlorobenzene <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 />_ <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 /><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 />Chloromethane <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 />Ethylbenzene <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 29 <0.5 <0.5 <br />Freon 113 NT NT NT NT NT <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <br />Hexachiorobutadiene 1.3" <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <br />Hexane <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <br />Cyclohexane <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <br />Heptane <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <1.0 <br />NR = Not Required <br />NT = Not Tested <br />. = Trace Concentration <br />(1) Parameter also detected in one or more quality control blanks. <br />SG -9; Printed: 1/31/2008 1 of 1 <br />