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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 />Desired level of precision (.1 for our purposes) <br />Q = 90% of reference area sample mean or 90% of technical standard <br />to = the (a = .10) t table value for a single - tailed t -test with (n -1) degrees of freedom <br />tB = the (a = .25) t table value for a single - tailed t -test <br />Miscellaneous Areas <br />The revegetation success criteria for miscellaneous areas 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 area will apply. <br />Maximum Recovery of Coal Resource <br />EC 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. EC plans to extract all coal <br />possible through the use of longwall and room and pillar mining systems. Further, a multiple seam extraction <br />plan will optimize recovery of all coal within the permit boundaries. <br />Permit Revision 04 -34 2.05 -35.1 Revised 7/2/04 <br />