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<br />will be logged and modeled for further determination. <br />Sufficient information should be available by Ma' 25, 1992 <br />to determine if substantial cyanide soluble co~per does <br />exist in the ore deposit (above 50 ppm). Once the <br />concentration and distribution of the cyanid soluble <br />copper species are established, the proper detoxification <br />method can be determined. <br />Detoxification investigations are currently being <br />conducted by BMGC (chloride), INCO (SOZ) and BEI (PH <br />adjustment and other). Immediately following ea h set of <br />detoxification testing, geochemical investigations will <br />begin. <br />Further, it appears at this time the detoxification <br />investigations and the cyanide soluble copper <br />determinations can be concluded simultaneously. <br />When BMG has determined the preferred l~ng term <br />detoxification system, a report, including test d ta, will <br />be prepared and submitted to MLRD when complete . <br />(8) Amendment of Tailings Area Reclamation Plan: <br />The Division is concerned that the introduction o cyanide <br />into the tailings area may be indicative of the nclusion <br />of associated metallic contaminants not o iginally <br />anticipated in its approved operations and re lamation <br />plan. BMG~s preliminary suspicions of alteredlmetallic <br />ore content and the coincidental failure of the designed <br />processing cyanide recovery circuit are additional <br />indications of a modification in the tailings 'chemical <br />constituency. If the chemical constituency,' of the <br />tailings is different than the original project~{ons, the <br />projected characterization of the tailings as on-toxic <br />and chemical inert is suspect. Change in the .tailings <br />constituency may render the approved final reclamation <br />plan for the tailings inappropriate. <br />In light of any information developed by BMG in t e course <br />of its required investigations, analyses and edesign, <br />including any amendment to its processing methodo ogy, BMG <br />shall amend its tailings area detoxification and reclama- <br />tion plans appropriately. Appropriate permit am ndments, <br />supported by comprehensive analytical results a d design <br />evaluations, shall be submitted by BMG to the Div Sion for <br />review and approval no later than 90 days ollowinq <br />completion of the cyanide detoxification of the tailings <br />areas contents, described in item (4) above. <br />5 <br />