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• <br />r1 <br />U <br />• <br />2.0 SAMPLING METHODS <br />2.1 Sample Layout <br />The sample layout protocol for the revegetation evaluation is a procedure designed to better <br />account for the heterogeneous expression of multiple seedings within the various reclaimed areas while <br />precluding bias in the sample site selection process. By design, the procedure is initiated randomly, and <br />thereafter, samples are identified in a systematic manner, along grid coordinates spaced at fixed <br />intervals, e.g. 100 ft. (see Exhibit 1 and Map 1). In this manner, "representation" from across the entire <br />reclaimed area is "forced" rather than risking the chance that significant pockets (or seedings) are <br />entirely missed, or overemphasized as often occurs with simple random sampling. Sample site selection <br />within the reference areas occurred in a similar manner, although the grid distribution was visual and <br />dimensions were altered accordingly to accommodate the different polygon shapes and sizes. <br />The actual procedure for sample site location occurred as follows. First, a fixed point of reference <br />locatable from year to year was selected. Second, a systematic grid of appropriate dimensions (e.g., 100 <br />ft. X 100 ft.) was selected to provide approximately 20 coordinate intersections within the revegetated <br />area that could then be used for sample sites. Third, a scaled, computer generated representation of the <br />selected grid was overlain on a computer generated map of the area utilizing north -south and east -west <br />compass points which could be easily established in the field. Initial placement of the grid was controlled <br />by the fourth step, selection of a pair of random numbers (between 0 and 100) used to facilitate location <br />of the initial coordinate point from the fixed reference location. Fifth, using a hand held GPS all sample <br />points were located in the field and sampled. The location of all 2009 sampling sites for the reclaimed <br />and adjacent areas are indicated on Map 1. <br />Once a selected grid point was located in the field, ground cover sampling transects were always <br />oriented in the direction of the next site to be physically sampled to further limit any potential bias while <br />facilitating sampling efficiency. This orientation protocol follows that which is indicated on Exhibit 1. If <br />the boundary of an area was encountered before reaching the full length of a transect, the orientation of <br />the transect was turned 90 in the appropriate direction so the transect could be completed within the <br />target unit. In this manner, boundary samples were retained entirely within the target unit by "bouncing" <br />off the boundaries <br />CEDAR CREEK ASSOCIATES, Inc. <br />Page 2 Hamilton Mine - Revegetation Evaluation - 2009 <br />