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Sampling and analysis procedures followed the guidelines furnished 6 <br />~• by the MLRB staff. <br />'" The C.S.U. Soil Testing Lab conducted the tests. Three strata <br /> were high in boron, but C.S.U. researchers expect no reclamation <br /> problem in this connection since the boron strata will "undoubtedly <br /> be mixed with other strata and the high boron soils will be diluted". <br /> Certain strata exhibited rather high selenium. Dr. Warren Keammerer, <br /> vegetation consultant, has not observed plants which might be con- <br /> sidered selenium indicators on the site. To prevent selenium <br /> toxicity in plants after reclamation, Walden Coal Company will <br /> instruct equipment operators in methods which ensure that various <br /> strata are well mixed as the overburden is stockpiled. <br /> Samples 805 and 806 in Appendix D are of McCallum Mine wastes. <br /> These showed a pH of 5.4 and 3.3 respectively and an iron content <br /> of 18.6 and 656 ppm respectively. According to John Havlin, these ~ <br /> <br /> were surface samples; all the rest of the C.S.U. samples were cores. ~r <br /> Apparently coal was piled near the mine mouth about 1911 and the <br /> ~ <br /> pyrite was leached out under oxidizing conditions forming a zone <br />• beneath rich in sulfuric acid and limonite. In later years the $~ <br /> l <br />il <br />d <br />d <br />d <br />' <br />~ <br />' <br />' <br />` <br />~ <br />°' <br />'=: <br /> coa <br />p <br />e <br />ecompose <br />an <br />eroded away. Uit <br />dei <br />"h <br />o <br />rmal <br />~rec <br />ucsng, <br />condi <br />; <br />. <br />. . <br /> . <br />-- --•......t.. <br />~'i'dns, •-as~ inilg`for example; thissame weathered-coal'`acts as a~`' r <br /> '4h.f:•.. ~ ,~sJq',1l,'(,y.:'Y1.~.t ..i.,-W. .r/Yp~i .~~. . <br />~1"a~nutritive . I£~"$'i~'t<crops"`are r't'h'e~'bnly~'''lush"'"vegetat'ion"on""'4 <br /> t•e~p~ty. While not in the least indicative of the pH of beds <br /> associated with the coal or in the overburden, this pointed out p <br /> that the weathered coal stockpile needed to be placed on saucer-shaped ~ <br />Fy. <br /> compacted overburden to retain all rainwater that falls on the i <br /> stockpile. This stockpile has been isolated from surface runoff by <br /> a ditch around this pile. If" of s to d, after StageT~l it~wll~~be <br /> ~~i'ac"e'd'~'in he Ver-~t~ of ttie`~pit~~~and buried. The material will <br /> be moved by scraper. As part of final reclamation the company will <br /> clean up any spilled coal (from truck scales, etc.) and bury it. <br /> Alluvial Soil. From 0 to about 12 feet of soil cover the <br /> bedrock outcrops on the Bourg property. Their thickness is estimated <br /> in Plate 13. They are more fully discussed below. <br /> <br /> STRUCTURE <br /> General. The structure of the coal and associated beds at <br /> the Bourg property is that of a faulted syncline with a steep south- ~ <br />t <br /> western limb, a gentle northeastern limb, and an axis plungifig <br /> n 5 <br />