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IME (Kent Crofts, principal) of Yampa, Colorado was contracted to conduct vegetation sampling under the <br />direct supervision of Trapper Environmental Manager Forrest Luke and is the author of the Attachment 1 <br />reports. Sampling was conducted as approved in Trapper's permit application C-1981-010 to ensure that <br />applicable approved post -mining land uses were achieved. <br />2.1. Vegetation Sampling Summary <br />Table 2.1-1 gives a summary of the vegetation data totals presented in Attachment 1 and compares these <br />totals against bond release success standards outlined in the Trapper permit document. Table 2.1-1 data <br />conclusively demonstrate that all vegetation standards were met for all parameters of interest for <br />rangeland post -mining land uses during both 2014 and 2015 sampling years. <br />2.2. Sample Adequacy <br />Table 2 in Attachment 1 (Crofts' Report) provides a summary of sample adequacy values calculated for all <br />of the vegetation parameters sampled for rangeland with this SL -17 application. <br />Results of the application of the reverse null hypothesis T -Test on mean to demonstrate revegetation <br />success for production and shrub density values are given in Table 2.2-1. Note that for all of the plant <br />production and shrub density sample parameters in question, the calculated T value exceeded the table T <br />value. Thus, in all cases the null hypothesis was rejected and revegetation parameters were deemed <br />successful. <br />Rangeland plant cover values were determined for the subject bond release blocks using simple random <br />sampling. For this parameter the sample adequacy equation used in Table 2 of Attachment 1 was valid <br />and sample adequacy was achieved. Since in all cases the sampled values exceeded the bond release <br />standards and since an adequate sample was demonstrated, there was no need to subject these <br />parameters to a reverse null evaluation. <br />3.0 Achievement of the Post -Mining Land Use <br />Trapper Mining Inc. has achieved the approved post -mining land uses of rangeland. <br />2 <br />