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Where: h ? = Minimum number of transects necessary to sample within the prescribed precision <br />and confidence <br />S' = Sample variance <br />d = Desired level of precision (. l 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 />RACE EC plans to mine its coal resources in a manner that will ensure maximum coal recovery and will nninimize the <br />area to be disturbed. No concurrent surface and underground operations are proposed. RAG EC plans to extract all <br />coal 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 />Ferilllt RCIle val 1`:To CE r 3, 5 1 ' _ 7,10 <br />