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Tabetha Lynch, DRMS <br />Page 2 <br />November 22, 2016 <br /> <br />4. Proposed revised page 2.05-35 for the Utah Tract explains what statistical equation will be used if <br />the vegetation success standard is less than 90% of the standard. The proposed equation is cited <br />to be from page 22 of the DMG Vegetation Guidelines. The “Sx” variable used to calculate the <br />standard error of the mean is proposed to be (s/s√4n). This variable should be (s/√n) in <br />accordance with Rule 4.15.11(2)(b) and in accordance with the Division’s “Guidelines Regarding <br />Selected Coal Mine Bond Release Issues” dated April 18, 1995. Please revise the equation to <br />match what is required by Rule 4.15.11(2)(b). <br /> <br />Should you or the applicant have any further questions, please feel free to contact me.