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Table 1 Blue Ribbon - 2007 <br />Phase III Revegetation Success Comparisons <br /> 2006 2007 <br /> Reference Reference <br />G ra ss I a n d Area / Revegetatea Area Area / Revegetated Area <br /> Standard Standard <br /> Value Value PFa ~ / Value Value P <br />/ <br /> Fa I <br />Total Herbaceous Cover (excluding noxious weeds) <br />Estimated Mean (°i~) 22.34 54.29 60.13 58.22 <br />90% of Reference Area Mean 20.11 20.11 54.12 54.12 <br />Sample Size Collected (n) 15 18 PASS 15 18 PASS <br />Minimum Sample Size Necessary (n,,,,,,) <br /> <br />reosron level ~ 10, one-tailed test 4.14 6.65 3.73 9.01 <br />Total Herbaceous Production (excluding noxious weeds) <br />Estimated Mean (Ibs./acre) 250.30 523.70 819.50 786.10 <br />90% of Reference Area Mean 225.27 225.27 737.55 737.55 <br />Sample Size Collected (n) 30 35 PASS 30 35 PASS <br />Minimum Sample Size Necessary (n,,,,,,) <br /> <br />(precision level - 0.10, one tailed test) 15.85 14.71 11.29 26.51 <br />Diversity <br />No. of Cool-Season Per. Grasses <br /> <br />(with between 3'% & 60% RelaUvc Cover) 4 <br />6 <br />4 4 <br />Perennial Forbs Relative Cover 3% 15.71% PASS 3% 28,35% PASS <br />No. of Shrub S ecies Observed 3 17 3 20 <br />Woody Plant Density (Young & Mature per acre) <br />Total Count (sterns/acre) 258 268 <br />90% of Standard 100 90 PA55 90 PASS <br />CEDAR CREEK ASSOCIATES, Inc. Page A - 1 Blue Ribbon Mine -Phase III Bond <br />Release Evaluation - 2007 -Appendix A <br />