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3.1.3 Test Plot 3 Test Plot 3 is located on the northwest facing slope of the Roadside RDA near the mid- point of the slope face. It is bounded on the west by the west facing slope of the RDA, ' on the north and east by the Roadside Preparation Plant and Mine Storage Area, and on the south by the top of the RDA. Test Plot 3 is not fenced, but is identified by perimeter posts and signs to prevent disturbance and inwsion. There are three soil treatment depths represented in Test Plot 3; 12" 6", and 24" (from northeast to southwest). Each treatment depth plot is 20 feet wide by 150 feet long. The predominant aspect of the test plot is north-northwest, and the prevailing grade is very steep, averaging 20 degrees. Prevailing wind direction appeared to be from the north, based on field observation. Figures 12-14 provide photographs of the Test Plot 3 ' treatment plots. 3.1.4 North Area ' The North Area is located on the west facing slope of the Roadside RDA 25 meters north of the northeast corner of Test Plot 2 and 10 meters downslope, near the mid- , point of the slope face. It is bounded on the west by the permit boundary and I-70, on the north and south by different slope faces of the RDA, and on the east by the top of ' the RDA. The North Area is not fenced, nor otherwise identified. The location selected approximates the location sampled in 1986 (WRDC, 1986). There is one soil treatment depth represented in the North Area; six inches. The North Area was considered to encompass an area equivalent to one soil depth treatment plot (20 feet ' wide by 150 feet long). The predominant aspect of the test plot is west, and the prevailing grade is very steep, averaging 24 degrees. Figure 15 is a photograph of the ' North Area. 3.1.5 South Area ' The South Area is located on the west facing slope of the Roadside RDA 25 meters south of the southeast corner of Test Plot 2 and 10 meters downslope, near the mid- ' point of the slope face. It is bounded on the west by the permit boundary and I-70, on the north and south by different slope faces of the RDA, and on the east by the top of the RDA. The South Area is not fenced, nor otherwise identified. The location ' selected approximates the location sampled in 1986 (WRDC, 1986). There is one soil treatment depth represented in the South Area; siz inches. The South Area was wnsidered to encompass an area equivalent to one soil depth treatment plot (20 feet wide by 150 feet long). The predominant aspect of the test plot is west, and the prevailing grade is very steep, averaging 24 degrees. Figure 16 is a photograph of the ' South Area. 22