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Where: Nm = Minimum number of transects necessary to sample within the prescribed precision <br />and confidence <br />S2 = Sample variance <br />d = Desired level of precision (.I for our purposes) <br />Q = 90% of reference area sample mean or 90% of technical standazd <br />t, = the (a = .10) t table value for asingle-tailed t-test with (n-1) degrees of freedom <br />to = the (a = .25) t table value for asingle-tailed t-test <br />Miscellaneous Areas <br />The revegetation success criteria for miscellaneous azeas such as sediment ponds and light duty roads will follow the <br />land use designations as shown on the Reclamation Plan Map (Map 29). The criteria for the land .use in each <br />particular azea will apply. <br />Maximum Recovery of Coal Resource <br />CEC plans to mine its coal resources in a manner that will ensure maximum coal recovery and will minimize the area <br />to be disturbed. No concurrent surface and underground operations are proposed. CEC plans to extract all coal <br />• possible through the use of longwall and room and pillar mining systems. Further, a multiple seam extraction plan <br />will optimize recovery of all coal within the permit boundaries. <br /> <br />Permit Renewal No. 3 2.05-35.1 7/15/98 <br />