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Seneca I1 Mine June 2014 <br />SL -6 Phase 111 Bond Release Request <br />tt = T— (0.9 % technical standard) <br />s <br />7—t-1 <br />554.4-90 <br />t`al` — 553.9 = 2.98 <br />R 30 <br />Since critical t = 0.854 (one - tailed, alpha = 0.2, 29 df) and t, is greater than this critical value, the <br />hypothesis of no difference is rejected and reclamation success for 2011 BRB -5 Phase III <br />Background 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 />Y— (0.9 Y technical standard) <br />t� _ l <br />r� n_ <br />2035.6-900 <br />t "d` — 1} = 5.62 <br />(1303.11) <br />Since critical t = 0.849 (one - tailed, alpha = 0.2, 49 do and tc is greater than this critical value, the <br />hypothesis of no difference is rejected and reclamation success for 2011 BRB -5 Phase III woody <br />plant Concentrations Areas under Phase III is demonstrated. <br />2012 Woody Plant Density Success Evaluation <br />The Background density of 210.4 stems per acre observed in the 2012 BRB -5 Phase III bond <br />release area exceeded the 90 stems per acre performance standard. The mean of 1,614.7 stems <br />per acre observed in the Concentration Areas also well exceeds the 900 stems per acre <br />performance standard. The combined total aerial extent of woody density Concentration Areas <br />was 19.0 acres, or 7.0% of the BRB -5 Phase III bond release block (271.2 acres). Hence the <br />standard that there would be at least 5% of the Phase III BRB block with at least 1,000 stems per <br />acre (90% of the standard equals 900 stems per acre) has been met for 2012. <br />17 <br />