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• 4.4.2.2 Pre-mining Sampling Sites <br />Based on the estimates of sampling intensity required to satisfy the appropriate statistical confidence <br />limits, each range site was independently randomly sampled. Sampling point selection was accom- <br />plished by locating range sites on 4800 scale maps (Map M48). Each premine sample plot was a <br />1.8-meter by 1.8-meter square plot enclosed by a 48-inch woven wire fence. A double randomization <br />process was followed in the placement of each plot on the 4800 scale map. First, a total of 25 points <br />were picked on a transparent sheet of random dot paper. These points were numbered from one to <br />25 in a random manner. A random number generator with upper and lower limits of one and 25 was <br />used to pick ten of the 25 numbers. The paper was then dropped repeatedly onto a 4800 scale map <br />of all range sites. Each time the random dot grid was dropped, the ten random points were marked on <br />the map. This process was continued until a total of 1.5 times the required number of sample points <br />per range site were located on the map. All points were then numbered and again the random <br />number generator was used to determine which points would be sample points. (Note that the <br />sampling points are not shown on Map M48 since sampling point locations will change yearly.) <br />Once sample points were randomly located on the map, the processes of field locating and fencing <br />were begun. Field locating was done by pacing the distance from a easily recognized landmark. The <br />point where the toe of the pacer's boot touched the ground on the last pace was marked. <br />• Once the points were located in the field, they became the basis for orienting all cover and density <br />transects. <br />• <br />4-140 <br />Revision: 7Q? <br />Approved: z dig