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1 <br />1 <br />1 <br />1 <br />1 <br />1 <br />1 <br />1 <br />1 <br />1 <br />1 <br />1 <br />1 <br />1 <br />1 <br />1 <br />1 <br />1 <br />1 <br />Table 8b <br />MAJOR LANDFILL GASES REPRODUCIBILITY DATA1,2 <br />Parameter <br />Sample <br />Number <br />Sample <br />Date <br />Oxygen <br />Gas <br />(nercent <br />Nitrogen <br />Concentration <br />by volume) <br />Carbon Dioxide <br />Methane <br />Laboratory <br />0.02 <br />0.05 <br />0.2 <br />0.002 <br />Detection Limits <br />Concentration <br />W-3 <br />02/17/87 <br />6.1 <br />34 <br />20 <br />40 <br />Concentration <br />W-3 DUP3 <br />02/17/87 <br />6.1 <br />34 <br />20 <br />40 <br />RPD (percent) <br />0 <br />0 <br />0 <br />0 <br />Concentration <br />W-4 <br />02/17/87 <br />1.1 <br />65 <br />27 <br />6.6 <br />Concentration <br />W-4 DUP <br />02/17/87 <br />1.2 <br />66 <br />26 <br />6.6 <br />RPD (percent) <br />9 <br />2 <br />4 <br />0 <br />Mean RPD (percent) <br />5 <br />1 <br />2 <br />0 <br />Standard Deviation <br />6 <br />1 <br />3 <br />0 <br />1. Reproducibility as Relative Percent Difference (RPD) <br />2. RPD = I x1 (xl + x2)/2 x 100 <br />1 2 <br />Where: xl = primary analytical result <br />X2 = duplicate analytical result <br />3. Dup = duplicate analytical results <br />49 <br />Rev. 0 09/20/88 <br />