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<br />Battle Mountain Gold <br />NOPV Abatement Requirements & Status <br />page 5 <br />June Progress: (Continued) <br />- BMG submitted TR-009, <br />leakage interception, <br />plan on June 16, 1992 <br />all the parties. Com <br />Statutory deadline is <br />(7) Modification of Ore Processing Methodology <br />proposing a tailing effluent <br />containment and tre tment <br />Copies have been rovided to <br />nents are due by Jun 26, 1992. <br />July 16, 1992. <br />BMG's preliminary suspicions of altered metallic ore content, nd the <br />coincidental failure of the designed processing cyanide recove circuit, <br />are indications that the ore processing methodology currently being <br />applied by BMG may require significant modification. If BMG determines <br />it necessary to modify its ore processing methodology, BMG shall submit <br />appropriate applications to the Division. Appropriate permit <br />modifications, supported by comprehensive analytical results an design <br />evaluations, shall be submitted by BMG to the Division for revi w and <br />approval -o '.titer than 45 days following completion of the cyanide <br />detoxification of the tailings areas contents, described in ite (4) <br />above. <br />Status: BMG submitted a written commitment to comply in a Lett r of <br />April 16, 1992. BMG committed to the completion of th <br />requested investigations, the development of an approp iate <br />detokification procedure, and the submission of a summ ry report. <br />(8) Modification of Tailings Area Reclamation Plan: <br />The Division is concerned that the introduction of cyanide into the <br />tailings area may be indicative of the inclusion of associated etallic <br />contaminants not originally anticipated in its approved operati ns and <br />reclamation plan. BMG's preliminary suspicions of altered meta lic ore <br />content, and the coincidental failure of the designed processin cyanide <br />recovery circuit, are additional indications of a modification n the <br />tailings chemical constituency. If the chemical constituency o the <br />tailings is different than the original projections, the projec ed <br />characterization of the tailings as non-toxic and chemically in rt is <br />suspect. Change in the tailings constituency may render the tip roved <br />final reclamation plan for the tailings inappropriate. <br />In light of any information developed by BMG in the course of ids <br />required investigations, analyses and redesign, including any <br />modification to its processing methodology, BMG shall modify it tailings <br />area detoxification and reclamation plans appropriately. Appro riate <br />applications, supported by comprehensive analytical results and design <br />evaluations, shall be submitted by BMG to the Division for revi w and <br />approval no later than 180 days following completion of the cya ide <br />detoxification of the tailings areas contents, described in ite (4) <br />above. <br />