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NA = Not Available <br />= Trace Concentration <br />11) Parameter also detected in one or more quality control blanks <br />OW -2M; Printed: 1/27/2014 1 oft <br />HISTORICAL SUMMARY OF ANALYTICAL RESULTS <br />UNSATURATED ZONE SOIL GAS <br />CORRAL HOLLOW LANDFILL <br />GW -2M <br />Sample Typa: Alr <br />Sampling Dafe <br />4/13/07 8/31/07 1/24/08 4/14/2008 7/30/08 1/24/09 7/10/09 1/18/10 <br />5/14/10 7/16/10 1/17/11 <br />7/28/11 4/5/12 <br />8/6/12 1/30/13 <br />Monitoring and Field Parameters <br />Methane Concentration(percent) <br />0.0 0.0 0 0 0 0 0 0 <br />0 0 0 <br />0 0 <br />0 0 <br />_ <br />_ Carbon Dloxld"ercenq <br />2.8 0.0 3.5 3 1.4 0.5 0.1 2.7 <br />0.3 2.5 2.1 <br />0.1 0.1 <br />0.2 3.9 <br />Oxygen (percent) <br />NA NA NA NA 18.6 20.0 16.7 16.7 <br />20.4 17.4 18.3 <br />20.2 19.9 <br />20.4 17.6 <br />NA = Not Available <br />= Trace Concentration <br />11) Parameter also detected in one or more quality control blanks <br />OW -2M; Printed: 1/27/2014 1 oft <br />