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As are recommended in Rule 4.15.11(2) & (3), during field sampling for cover, at least 15 <br />samples (observational units) will be made at each site. For production sampling at least 30 <br />transects will be sampled from each area. Sample adequacy will be tested after 15 cover and 30 <br />production samples are taken. Sampling may continue if necessary to reach sample adequacy, <br />or sampling may be terminated before sample adequacy is reached if an alternative statistical <br />method (approved by DRMS such as the reverse null test) can be used that does not require <br />demonstration of sample adequacy. A maximum sample size of 50 transects will be used in all <br />revegetation monitoring. Alternative procedures will require a minimum of 15 or 30 transects, <br />as detailed below. Because dry -weight production data will not be available until samples are <br />air-dried in the laboratory, sample adequacy will initially be calculated on fresh weights of <br />clipped material, then recalculated later for air-dried material. <br />Reclaimed area cover and production will be compared to a standard equal to the mean values <br />measured at the reference area by sampling, as described below. Revegetation will be <br />considered "successful" if the mean value for the reclaimed site can be demonstrated to equal or <br />exceed "Q" (Q=90% of the standard). One of the following four methods will be used to <br />compare mean values at reclaimed sites to Q, depending on the mean values and whether sample <br />adequacy was reached during sampling. <br />1) If sample adequacy exists at the reclaimed site and the reference area, and the reclaimed site <br />mean is equal to or greater than Q, no statistical comparison is necessary and revegetation at the <br />reclaimed site will be deemed successful for the parameter in question. This complies with the <br />provisions of DRMS Regulation 4.15.11(2)(a). <br />2) If sample adequacy exists at the reclaimed site and the reference area, and the mean value at <br />the reclaimed site is less than Q, a "standard null" one-sided t-test with alpha error probability of <br />0.10 will be used, in conformance with DRMS Regulation 4.15.11(2)(b), using the general form <br />of the one-sided t-test as follows: <br />January 2015 TR -66 2.05.4(2)(e) - 31 <br />