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although studies at Climax continue . For <br /> instance, Denver sludge has been incorporated <br /> into our research plot treatments. However , <br /> chemical analyses of the sludges have not yet <br /> substantiated the feasibility of extensive <br /> sludge usage during the operational life of the <br /> mill . <br /> Presently, the Climax Mill is running tests on <br /> the sludges as an indication of their influence <br /> on the milling process. It appears that Denver <br /> has a very appropriate sludge for our purposes ; <br /> its dry weight content can approach 90-95%. <br /> Additional time is required to evaluate the <br /> potential of Summit County sludge due to its <br /> liquid characteristic (7% dry weight) . <br /> Following the Mill ' s evaluation of the sludges, <br /> there may or may not remain the need to test the <br /> sludges on the ground for potential runoff and <br /> leach problems . <br /> If the mining operation were to cease today, <br /> Climax would definitely use sewage sludge in its <br /> reclamation efforts. For purposes of interim <br /> reclamation efforts , however , a further period <br /> of study is indicated . <br /> 11. Q. What studies have been done on salt and heavy ; <br /> metal uptake by plants growing on tailing ' <br /> material? <br /> A. No studies have been carried out at Climax one <br /> salt and heavy metal uptake by plants . <br /> 12. Q. How much topsoil is available to aid the <br /> reclamation of Mayflower tailing pond and the <br /> base of the low grade ore stockpile? <br /> A. Approximately 300,000 cubic yards of topsoil <br /> will be available for the Mayflower Tailing Pond <br /> reclamation program. This soil will be used to 1 <br /> create islands of topsoil only; a continuous <br /> blanket will not be spread over the entire <br /> tailing area. Approximately 10, 000 cubic yards <br /> of topsoil will be used for the base of the low <br /> grade ore stockpile . This soil will be spread <br /> over the outside bench of the base along Highway <br /> 91 and over the bank slope of the bench. <br /> f <br /> -17- <br /> / t <br />