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Figure 3: Probability Distribution of Total Ventilation Flow for ESM Shaft <br />pso = Median, there is a <br />50 percent probability <br />that the ventilation flow <br />in the Deer Creek ESM <br />shaft will be 920,288 <br />scfm. <br />Pio = There is a 10 <br />percent probability that <br />the ventilation flow in <br />the Deer Creek ESM shaft <br />will be 1,020,318 scfm or <br />greater. <br />p90 = There is a 90 <br />percent probability that <br />the ventilation flow in <br />the Deer Creek ESM shaft <br />will be 830,065 scfm or <br />greater. <br />GVB Production Analysis <br />The GVB data is reported on a weekly basis for each operating GVB, with methane concentration and <br />volumes reported separately. Methane concentration in the GVBs ranges from 26.06 percent to 91.89 <br />percent. Curve fitting and probabilistic analysis was carried out to determine the following: <br />• Number of GVBs operating at each week, shown as Figure 4; <br />• Weekly production of all operating GVBs, shown in Figure 5; <br />• Methane concentration in gob gas, shown in Figure 6; <br />• Number of Weeks each GVB is operating, Figure 7; <br />• pso production volumes for the years 2013 through 2016; and <br />• pso duration that each GVB is operating for the years 2013 through 2016 in weeks. <br />VA <br />