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Since critical t = 0.849 (one - tailed, alpha = 0.2, 53 -1 df) and t is greater than this critical value, <br />reclamation success for concentration area woody plant density for Phase III in 2012 is demonstrated. <br />SPECIES DIVERSITY AND COMPOSITION <br />With regard to Mandatory Test A, that no single species comprise greater than 60% relative cover in the <br />2012 BRB -1. Table H -1 shows that the most abundant single species alfalfa (Medicago sativa) was <br />29.5% relative all -hit cover, below the 60% threshold of concern. <br />Hence Mandatory Test A is passed for 2012 data. <br />With regard to Alternative Test B, the Total Species Density test the following is calculated for the 2012 <br />BRB -1 (Table H -2): <br />Mean Species density (Area - weighted) in the 4 reference areas = 28.9 species per 100 sq.m. <br />Probability adjusted density standard: <br />Mean Reference Area Species Density — 1.15s = 28.9 — 1.15 (6.54) = 21.37 <br />Mean total species density in the 2012 BRB -1 = 26.46 <br />Since the reclaimed area value was greater than the standard, Alternative Test B is passed for 2012 <br />data. <br />Regarding Alternative Test C, the similarity index between the lifeform species density values for the <br />prescribed lifeforms for the 2012 BRB -1 and the Mean Species density (Area - weighted) in the four <br />reference areas is 77% (Table H -3), exceeding 90% of the standard (0.9 x 70% = 63 %). <br />Hence Alternative Test C is passed for 2012 data. <br />Regards Alternative Test D, the total number of native species encountered in the first eleven 100 sq. m. <br />(2 m x 50 m) samples of the 2012 BRB -1 that constituted an adequate cover sample was 41 (Table H -4), <br />substantially greater than the weighted reference area average species density (28.9 species per 100 <br />sq.m.). <br />23 <br />