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beyond the highwall side of the proposed pit. These two holes are <br />• also utilized in Cross Section D-D' (Exhibit C-4) which is along <br />strike through the proposed permit area. Lithologic samples from <br />both holes were collected by a Wyoming Fuel Company staff geologist <br />on September 6, 1980, during drilling operations. Samples were <br />collected from air drilled cuttings as they were discharged <br />from the hole. <br />When collecting the air drilled cuttings samples, the following <br />methodology was used; air drilled cuttings were collected with a <br />sieve and are representative of five foot increments, except where <br />the lithology visually changed between increments, in which case <br />the cuttings were collected at the lithologic change. Samples were <br />described by the on-site geologist, and subsequently placed in bags <br />which were labeled. The lithologic descriptions as well as electric <br />logs for these two holes are found at the end of this Appendix. <br />Since all cuttings were air drilled, major lithologic changes <br />were readily apparent as the cuttings were blown from the hole. <br />• Power and Sandoval, 1976, concluded that this method was probably <br />the least contaminating of those tested, so it is assumed that <br />samples collected using this technique are as representative as a <br />continuous core. Due to the bad boring conditions (i.e., dipping <br />strata, fractured zones, faulting, etc., which cause core loss) it <br />is our belief that the cuttings samples are a more definitive method <br />of obtaining representative overburden samples, at least for this <br />site specific case. <br />Once the samples were collected and the lithologies docu- <br />mented, the cuttings samples were divided for analysis in the <br />following manner: <br />i 1. Each major lithologic unit was individually analyzed. <br />• <br />-32- <br />