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<br />' 6. Page 2: (rt the initial samples from the process (pre-decor, post-detox, and both <br />impoundment areas as well as collection pond), it would be valuable to have a <br />complete suite of analyses (TABLE 1J to characterize the conditions filly as of the <br />' start of recovery to 4 pprn cyanide levels. Following that, dte sampling on a <br />weekly rather than biweekly basis would give a better picna•e of irrcrernerual <br />' recovery progress. At the end of recovery, the analysis as per TABLE 1 would <br />then give comparative data relative to where the patds and process water should <br />remain as on-going activity under new operating conditions went fault (ijtlris is <br />' finally permitted). <br />RESPONSE: The critical parameters in monitoring the success of the detoxification in the <br />' tailings system are forms of cyanide, namely total cyanide and weak acid <br />dissociable cyanide, together with the metal species which form mitalle-cyanide <br />complexes. In addition, pH value is useful in assessing speciation within "free" <br />' cyanide. <br />Beyond the above parameters, while additional data may be of great academic <br />' interest, they have little validity in the assessment of the perfon»Hnce of cyanide <br />detoxification efforts. <br />' 7. Taking REPRESENTATIVE samples from the impoundments may prove <br /> challenging and there is little discussion of this issue in dt¢ report. The <br /> stratification or si:on circuiting occurs in the ponds, drew a larger number of <br />' replicate samples and analyses Wray be necessary. <br /> RESPONSE: See Harry Posey's comment for Page 28+ (No. l4 under the "Page-by-Page <br /> Comments" section). <br />' 8. Page 5: Wllo takes die samples? Will there be adequate training pad supervision <br />to assure reliable adherence to a protocol for sample recoverp, preservation, <br /> labeling, and [ranspor[ that is anything but trivial? What are theher•iodic checks <br />' on training to assure a high level of sample integrity? <br /> RESPONSE: Sampling will be conducted by qualified BMR personnel or by a qualified outside <br /> contractor. The purpose of the protocol document is to assure that accepted <br />' QA/QC protocols are followed during sample collection and Handling. All <br /> sampling personnel will have the necessary training and experience in collecting <br />' samples and adhering to the requirements of the Protocol. <br /> 9. Page 7: Procedural deviations should be directly noted ort the clrairt of custody <br />' fonn. <br />' -17- <br /> <br /> <br />