2011-08-26_REVISION - M1981185 - Laserfiche WebLink

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Geochemistry Review 2 23 August 2011 May Day Conversion CN -1 File No. M- 1981 -185 B. Attachment D -6, Augmentation Pond Construction Work Plan Since the pond is not lined, the Applicant must provide a commitment that no water other than Idaho Spring water will be diverted into the pond. Storm water and overland flow water must be diverted around the pond. C. Attachment D -7, Tailings Geochemical Characterization Work Plan: 1) The Applicant must describe the type of testing that will be used to determine the concentrations of Arsenic, Copper, Iron (Fe[II] and Fe[IIIJ), Lead, Potassium, Zinc, and Sulfate. 2) ABA: In addition to total sulfur all tests must include sulfide sulfur. 3) Humidity Cell Test: The collection of sample material for the tailings humidity cell test must be done with the DRMS geochemist present. The humidity cell test must be conducted under the conditions outlined in the Division's adequacy review of 25 March 2011, i.e., the test must be run indefinitely or until notified otherwise by the division and the analyte list must be as described in the 25 March 2011 review. 4) For the "solution characterization method to analyze for pH acidity alkalinity metals anions nitrates minerals cyanides organic carbon and total dissolved solids TDS", the Applicant must describe the analytical methodologies to be used for each. D. Attachment D -8, Whole Rock Sampling and Kinetic Testing Work Plan 1) For all solids tests (e.g., SPLP, humidity cell, acid -base accounting, whole rock analyses, solution characterization methods), the Applicant must commit to consulting with the Division prior to the tests to determine appropriate sampling and analytical parameters, including, but not limited to, what is regarded as a representative sample, the appropriate analytical suite for each test, and laboratories that are qualified to perform the tests. 2) ABA: In addition to total sulfur all tests must include sulfide sulfur. 3) Humidity Cell Test: Collection of sample material for the tailings humidity cell test must be done with the DBMS geochemist present. The humidity cell test must be conducted under the conditions outlined in the Division's adequacy review of 25 March 2011, i.e., the test must be run indefinitely or until notified otherwise by the division and the analyte list must be as described in the 25 March 2011 review. E. Exhibit G — Water Information 1) Adequacy Issue #5.A. a) The Applicant states that the point of compliance for groundwater will be the monitoring well located on the May Day No. 2 bench, which appears to be the closest accessible location down gradient of the active mine operation May Day No. 1.