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• stratum immediately below the Wadge Seam were conducted for the <br /> purpose of identifying, at a minimum, those horizons containing <br />potential acid-forming, tonic-forming or alkalinity-producing <br />materials. The overburden in the proposed permit area was sampled <br />by collecting cuttings from holes drilled with air. The vertical <br />and geographical density of sampling, the sampling and testing <br />techniques and the chemical parameters analyzed are specified in <br />accordance with the procedures published in: 1) the Soils and <br />Overburden Guidelines, 1977, .of the Reclamation Division, Department <br />of State Lands, State of Montana; 2) Guidelines 1-3 of the Division <br />of Land Quality, Department of Bnviro~ental Quality, State of <br />Wyoming; and 3) the IISGS requirements set forth in 30 CFR 211.10(c) <br />(6)(aii). Vanadium and chloride have been added. <br />• <br />The chemical parameters for which the overburden vas analyzed <br />are presented in Table 2, Overburden Analysis List. The geographic <br />sampling density used for sample collection was one hole per 859 <br />linear feet. The vertical density was as follows: <br />Lithotypea less than 10 feet thick - one composite sample from <br />5 foot intervals <br />Lithotypes 10 to 30 feet thick - one composite sample <br />from 5 foot intervals <br />Lithotypes greater than 30 feet thick - one composite sample <br />every 100 feet from 5 <br />foot intervals <br />As used here, "lithotype" is defined as a distinct sedimentary <br />deposit of uniform composition based upon physical and visual <br />2.04-33 <br />