2011-11-08_PERMIT FILE - C1981041A (9)

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The success of revegetation for bond release will be determined by comparing the vegetation in the applicable reference area using the methods and criteria described below. REVEGETATION SUCCESS SAMPLING METHODS Sample Layout By design, the sample layout procedure will be initiated randomly, and thereafter, samples will be identified in a systematic manner, along grid coordinates spaced at fixed intervals, e.g. 100ft. In this manner, "representation" from across the entire reclaimed area is "forced" rather than risking the chance that significant pockets are entirely missed, or overemphasized. Sample site selection within the reference area will occur in a similar manner, although the grid dimensions could be altered accordingly to accommodate the different sizes. The procedure for sample site locations will be as follows. A fixed point of reference locatable from year to year will be selected. A systematic grid of appropriate dimension will be selected to provide approximately 10 or 15 coordinate intersections within each sampling unit (20 for reference areas), which will then be used for sample sites. A scaled, computer generated representation of the selected grid will be overlain on a computer generated map of the area utilizing north -south and east -west compass points which could be easily established in the field. Initial placement of the grid will be controlled by selecting a pair of random numbers (between 0 and 100) used to facilitate location of the initial coordinate point from the fixed reference location. Using a hand held surveying compass (or GPS) and hip -chain (or pacing techniques) sample points will be located in the field and temporarily marked. Once a selected grid point is located in the field, ground cover sampling transects will be oriented in the direction of the next site to be physically sampled to further limit any potential bias while facilitating sampling efficiency. If the boundary of an area is encountered before reaching the full length of the transect, the TR -60 14 -19 (Rev. 03/11)