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• C. REFERENCE AREAS <br />C.1. Purpose of Sampling <br />Each reference area rill be sampled initially for cover, productivity and <br />botanical composition to establish comparability to the area to be mined. <br />Thereafter, the reference areas will serve as a measure of year quality in <br />terms of total cover and productivity of perennial herbaceous species for <br />comparison to revegetated areas. <br />C.2. General Sampling Procedure <br />Ne will construct a 100-point grid of each reference area and draw at randon <br />15 to 20 of those points for locating sample plots. Individual plot size <br />for cover is 16 square feet, and for productivity is 4 square feet, as <br />described in B.6.3. All data rill be collected in August and early <br />September. <br />• C.3. Statistical Calculations <br />C.3.1. For reference area comparability <br />Refer to Section B.6.5. for description of proposed group comparison T teat. <br />C.3.2. For success standards <br />Sample statistics (as im Table 1) will be calculated for both total cover <br />and productivity in years Y9 and Y10, and used to establish success standards <br />according to the weighted-average procedure of 4.1$.7(4)(b). <br />/. <br />11 <br />