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<br />hydrostatic head to remain low in the impoundment. The <br />collection pond is double lined with a leak detection <br />system. This system can be readily accessed and is <br />frequently checked. If a leak is detected irk the top <br />liner, the liner can then be inspected and repai~ed. All <br />solution is automatically collected and auto atically <br />returned to the milling circuit, preventing any ischarge <br />to the environment through the secondary liner. <br />(6) Cyanide Interception, Containment and Remedial~lan: <br />If the tailings area leak detection system yi lds more <br />than the approved 4.5 gallons/minute rate of low, and <br />cyanide is detected within that effluent, B G shall <br />evaluate all groundwater monitoring data to etermine <br />whether any cyanide contamination has occurred. (Further, <br />BMG shall develop and submit an interception, containment <br />and remedial plan for impacted groundwater, surf ce water <br />and soil. This plan shall be submitted to the~Division <br />for review and approval within ten days ~ollowing <br />detection of cyanide in the leak detection syst m. <br />Discussion• <br />Monitoring results obtained to date from the collection <br />pond confirm that the concern presented in item s x is not <br />occurring. However, as time permits, we will ubmit an <br />action plan for approval. We do not anti ipate a <br />reportable leak in the primary lining; however, a are in <br />agreement that a remediation plan should be dev loped. <br />(7) Amendment of Ore Processing Methodolo~~: <br />BMG's preliminary suspicions of altered meta lic ore <br />content and the coincidental failure of the designed <br />processing cyanide recovery circuit are indicat'ons that <br />the ore processing methodology currently being a plied by <br />BMG may require significant modification. If BMG <br />determines it necessary to modify its ore p ocessing <br />methodology, BMG shall submit appropriate permit revision <br />applications to the Division. Appropriate permit amend- <br />ments, supported by comprehensive analytical re ults and <br />design evaluations, shall be submitted by BM to the <br />Division for review and approval no later than 45 days <br />following completion of the cyanide detoxification of the <br />tailings areas contents, described in item (4) bove. <br />Discussion• <br />All available exploration samples are being re-as~ayed for <br />cyanide soluble copper. Assaying is expecte to be <br />complete April 30, 1992, at which time the copp r assays <br />