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Hany Ranney <br />January 22, 2004 <br />Page 4 <br />The null hypothesis being tested is that the bond release block mean (u) is greater than or equal to <br />90% of the standard (H°: u> Q). If t~ is less than or equal to the 1-tailed t table value for alpha error <br />probability of.10 at the appropriate degrees of freedom, then H° is not rejected, and revegetation is <br />deemed successful for the parameter tested. <br />Species Diversity <br />The diversity ofplant species present in the Dryland Reference Area and the two reclaimed areas will <br />be evaluated using data on vegetative ground cover acquired from the point-intercept transects. An <br />evaluation of species diversity will be derived from data acquired during the June sampling even[. <br />Data from the transects will be analyzed by implementing Equation 4 to calculate the relative cover <br />of each species detected. <br />(4) <br />Relative Cover of Species X = ° ~ Cover of Species X <br />/o Total Vegetative Cover <br />Post-mining success of species diversity will be evaluated by comparing the relative cover values of <br />the reclaimed areas with the values ascertained within the reference area vegetation community. The <br />species diversity standard for the two reclaimed dryland sample units is the establishment of two <br />cool-season grasses, one warm-season grass, and either one perennial forb or one shrub, each with a <br />relative cover value between 3 and 60 percent. <br />Kaiser will submit an application for Phase III bond release, including data obtained during the 2003 <br />and 2004 sampling events, in the fall of 2004. <br />We plan to conduct sampling for vegetative ground cover, herbaceous production, and species <br />diversity on June 21 through June 24, 2004. Three maps that display the planned sample locations for <br />the three sample areas are attached to the end of this study plan. If you have any questions or need <br />additional information on our scope of work, please call me at (303) 850-0930. We welcome all <br />comments from the CDMG. <br />Sincerely, <br />~~~ <br />Chuck Florian <br />Staff Ecologist <br />