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~'z .'p i:: ~/ <br />.ti•. <br />/... ~ <br />~~a~ <br />4.15.7(2)(b) Methods to be used in the measurement of all applicable <br />• parameters such as herbaceous cover and productivity, species diversity, and <br />woody plant density; <br />RESPONSE <br />The methods to be used in measuring revegetation success will be the same as <br />those used in the reference areas study. See the study report in Volume <br />III, Section G, Subsection 2; specifically Section 2.0 METHODS, of the <br />report. <br />4.15.7(2)(c) Statistical tests to be performed and how the results of these <br />tests are to be interpreted; <br />RESPONSE <br />One tailed tests will be used to compare measured parameters between refe- <br />rence areas and the reclaimed areas. Means between the two areas will be <br />considered the same if the reclaimed areas achieve at least 90% of the <br />reference area value with BO% statistical confidence. Reclamation will be <br />• considered satisfactory if mean values measured on reclaimed areas can be <br />shown to be statistically the same as those on reference areas. <br />4.15.7(2)(d) b discussion of the comparisons to be made between the re- <br />claimed and undisturbed areas in order to demonstrate that the success <br />criteria in 4.15.8, 4,15.9. or 4.15.10 have been met. Upon approval of the <br />Division, such comparisons of herbaceous cover and productivity, woody plant <br />density, species diversity. seasonal variety or other applicable parameters <br />may be used on one or more of the following: <br />(i) Reference areas as described in 4.15.7(3); <br />RESPONSE <br />H-G Coal Company has chosen to establish reference areas to serve as stan- <br />dards for determining revegetation success. Therefore item 4.15.1(2)(d)(i) <br />applies and items 4.15.7(d)(ii). (iii), and (vi) do not apply. <br />4.15.7(2)(d)(iv) Standards based on premining data, for the evaluation of <br />herbaceous cover or productivity for those plant communities which the <br />.~ Division determines are of minor significance within the permit area and do <br />not constitute critical or unique habitat; <br />Revised 10/87 <br />