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Seneca l/ Mine <br />SL -6 Phase 111 Bond Release Request <br />June 2014 <br />A reverse t -test asserting that the 2012 BRB -5 Phase III Background woody plant density is <br />indistinguishable from 90% of the standard is as follows: <br />— (0.9 * technical standard) <br />trctr — <br />ts <br />n) <br />210.4-90 <br />t`aI` — — 2.23 <br />392.5 <br />RN <br />Since critical t = 0.849 (one - tailed, alpha = 0.2, 52 df) and tcdc is greater than this critical value, <br />the hypothesis of no difference is rejected and reclamation success for 2012 BRB -5 background <br />woody plant density under Phase III is demonstrated. <br />A reverse t -test asserting that the 2011 BRB -5 Phase III Concentration Area woody plant density <br />is indistinguishable from 90% of the standard is as follows: <br />tr 7— (0.9 = technical standard) <br />cic ° (( ll <br />lJnl <br />trntc — <br />1614.7-900 <br />(123 8 - 4.07 <br />Since critical t = 0.849 (one - tailed, alpha = 0.2, 52 df and t,:,,, is greater than this critical value, <br />the hypothesis of no difference is rejected and reclamation success for BRB -5 2012 woody plant <br />concentrations areas under Phase III is demonstrated. <br />Species Diversity. Seneca II Mine bond release requirements for species diversity are judged <br />using the four tests presented below. Success is demonstrated by passing the first (A) and at least two of <br />the remaining three (B, C, and D). <br />Mandatory TestA): No Overwhelming Dominant <br />No single plant species may exceed 60% relative cover. <br />18 <br />