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Figure 6: Probability Distribution of Methane Concentration in Gob Gas <br />Name: Quarterly methane concentration of each operating well 2013-2015 5i I O <br />Location 0.00% Mean 59.61% J Std. Dev. 15.86% 1 J <br />Figure 7: Probability Distribution of the Number of Weeks each GVB Operates <br />rune: jtneeks GVBs Opmted 'ta <br />I�l <br />(Lognormal Distribution <br />a <br />0 <br />a <br />10-293 <br />hlMian - 7 fi <br />P90 - 1 5 <br />0.0 20.0 49.0 60.0 00.0 100.0 120.0 140.0 160.0 160.0 <br />Location. (0.9) a Mwn13.0 SUd. Der. 18.0 <br />P50 = Median, there is a <br />50 percent probability <br />that weekly methane <br />concentration in all the <br />GVBs will be 57.61 <br />percent. <br />pa.o = There is a 10 <br />percent probability that <br />weekly methane <br />concentration in all the <br />GVBs will be 80.55 <br />percent or greater. <br />p90 = There is a 90 <br />percent probability that <br />the weekly methane <br />production will be 41.20 <br />percent or greater. <br />pyo = Median, there is <br />CI 50 percent <br />probability that GVBs <br />will operate for 7.6 <br />weeks. <br />pa.o = There is a 10 <br />percent probability <br />that GVBs will operate <br />for at least 29.4 weeks <br />p90 = There is a 90 <br />percent probability <br />that GVBs will <br />operated for at least <br />1.5 weeks. <br />Considerations for Capture and Use of CMM at the West Elk Mine <br />Presently, methane is liberated from the West Elk Mine in two forms; via GVBs where the gas <br />concentration ranges from 30 percent to as high as 90 percent by volume in air, with a pyo value of 56.87 <br />E <br />Lognormal Distribution <br />a <br />a <br />0 <br />a <br />P 10 = 80.55% <br />Mean = 59.61% <br />Median = 57.51% <br />P90 = 41.20% <br />40.00% 60.00% 90.00% 100.00% 120.00% <br />Location 0.00% Mean 59.61% J Std. Dev. 15.86% 1 J <br />Figure 7: Probability Distribution of the Number of Weeks each GVB Operates <br />rune: jtneeks GVBs Opmted 'ta <br />I�l <br />(Lognormal Distribution <br />a <br />0 <br />a <br />10-293 <br />hlMian - 7 fi <br />P90 - 1 5 <br />0.0 20.0 49.0 60.0 00.0 100.0 120.0 140.0 160.0 160.0 <br />Location. (0.9) a Mwn13.0 SUd. Der. 18.0 <br />P50 = Median, there is a <br />50 percent probability <br />that weekly methane <br />concentration in all the <br />GVBs will be 57.61 <br />percent. <br />pa.o = There is a 10 <br />percent probability that <br />weekly methane <br />concentration in all the <br />GVBs will be 80.55 <br />percent or greater. <br />p90 = There is a 90 <br />percent probability that <br />the weekly methane <br />production will be 41.20 <br />percent or greater. <br />pyo = Median, there is <br />CI 50 percent <br />probability that GVBs <br />will operate for 7.6 <br />weeks. <br />pa.o = There is a 10 <br />percent probability <br />that GVBs will operate <br />for at least 29.4 weeks <br />p90 = There is a 90 <br />percent probability <br />that GVBs will <br />operated for at least <br />1.5 weeks. <br />Considerations for Capture and Use of CMM at the West Elk Mine <br />Presently, methane is liberated from the West Elk Mine in two forms; via GVBs where the gas <br />concentration ranges from 30 percent to as high as 90 percent by volume in air, with a pyo value of 56.87 <br />E <br />