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i Quality Guideline No. 1 was considered, which states that in <br />regions of steeply dipping lithologies there should be a minimum <br />of one hole per 2000 feet along a transect running perpendicular <br />to the dip, and that the hole should be located along the highwall <br />side of the proposed mine. It should be noted that this hole <br />samples a considerably greater portion of the stratigraphy than <br />will actually be exposed during mining operations. <br />Physical Properties. <br />Certain physical properties of the overburden samples and <br />mine spoil were determined, including compaction and erodability. <br />The results of these as well as descriptions of other properties <br />are discussed below. <br />Texture <br />A particle-size analysis was run on each of the forty- <br />four samples submitted to the overburden laboratory. These analyses <br />are presented in terms of percentages of sand, silt and clay-sized <br />particles in the total sample. Sand-sized particles range in <br />diameter from 2mm to 1/16mm, silt-sized from 1/16mm to 1/256mm, <br />and clay-sized under 1/256mm. The tabulated results of this grain <br />size analysis are found in Table 4 along with the remainder of the <br />results from the chemical parameters tested. <br />Porosity and Permeabili <br />In conjunction with subsurface water determinations, <br />porosity and permeability tests were performed on representative <br />samples from the original pit. The results of these tests are <br />given in the text of the report submitted by Willard Owens and <br />Associates concerning the hydrology of Pit 1 (see report at the <br />end of this Appendix). <br />n <br />U <br />-13- <br />