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The mandatory test(Test A) is based on the cover sampling data and requires that no single plant <br /> exceeds 60 percent relative cover. Alternative test B (or Alternative Test 1) is a comparison for <br /> total species density between the reference and reclaimed areas. Alternative Test C (or Alternative <br /> Test 2)is an assessment of the distribution of species abundance among lifeforms in the reclaimed <br /> areas compared to the reference. Alternative Test D(or Alternative Test 3)is an assessment of the <br /> presence of native species in the reclaimed areas compared to the reference areas. Details of the <br /> means for evaluating success with supporting information on calculation methods is detailed in <br /> the text and appendix tables of the 2015/2016 vegetation monitoring report contained in <br /> Attachment D—Revegetation Success Supporting Documentation. <br /> 2015 Species Diversity Success Evaluations <br /> Success for Mandatory Test A requires that no single species comprise greater than 60% relative <br /> cover in the 2015 reclaimed Phase III bond release area. Table J-1 of the revegetation monitoring <br /> report (Attachment D —Revegetation Success Supporting Documentation) shows that the most <br /> abundant single species alfalfa (Medicago sativa) was 26.4% relative first-hit cover, well below <br /> the 60%threshold of concern. <br /> Thus, Mandatory Test A is passed based on assessment of 2015 cover data. <br /> With regard to Alternative Test B, Total Species Density Test, the standard is the point at which <br /> the central 75 percent of the distribution of overall species density in the Reference Areas begins. <br /> Mathematically this would be the Mean Reference Area species density (9 of species per 100 sq. <br /> m.) — 1.15s where s is the standard deviation. The following is calculated for the 2015 BRB-1 <br /> Phase III release area (see Table J-2 in Attachment D): <br /> Mean Species density(un-weighted,without noxious species)in the four reference areas= <br /> 27.16 species per 100 sq.m. <br /> Probability-adjusted density standard: <br /> Mean Reference Area Species Density— 1.15s= 27.16— 1.15 (5.39) =20.96 <br /> Mean total species density in the 2015 BRB-2 =27.94 <br /> Since the reclaimed area value (27.94) was greater than the standard (20.96), Alternative Test B <br /> is passed for 2015 data. <br /> SL-7 - 23 <br />