2020-08-03_REVISION - M1980244 (11)

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ICMC RECERTIFICATION SUMMARY AUDIT REPORT Cyanide tanks and pipelines are constructed of materials compatible with cyanide and high pH conditions. Concerning tanks and pipelines of ADR1 and VLF1, the 2014 recertification audit report states that “CC&V uses carbon steel, stainless steel, HDPE, and polyvinyl chloride (“PVC”) piping materials and piping system components. All cyanide process tanks are constructed of carbon steel.” Regarding tanks and pipelines for the new cyanide facilities (i.e., the HGM, ADR2, PSES Plant, and VLF2), all cyanide pipelines were constructed of carbon steel and HDPE. Cyanide tanks were constructed of carbon steel. The auditors reviewed design, as built and QA/QC documentation to verify compliance. Standard of Practice 4.8: Implement quality control/quality assurance procedures to confirm that cyanide facilities are constructed according to accepted engineering standards and specifications. CC&V is: in full compliance with Standard of Practice 4.8 in substantial compliance with not in compliance with Summarize the basis for this finding: The operation is in FULL COMPLIANCE with Standard of Practice 4.8; implement quality control/quality assurance procedures to confirm that cyanide facilities are constructed according to accepted engineering standards and specifications. The existence and contents of the construction QA/QC programs implemented for the cyanide facilities, constructed and in operation at the time of the 2007 initial certification audit and the 2010 and 2014 recertification audits, were evaluated and found compliant during those audits. QA/QC programs have also been implemented during construction of the cyanide facilities that are new since the previous recertification audit. The auditors reviewed record of construction reports, which include as built drawings, QA/QC completion reports, QA/QC testing results, and Commission Packages. CC&V has implemented QA/QC programs that address the suitability of materials, adequacy of soil compaction for earthworks, and installation of geomembrane liners. QA/QC documentation describe the parties involved, QA/QC activities and testing, design modifications, and as built drawings. CC&V has retained design, as-built, and construction QA/QC records for all cyanide facilities on site (including new and existing cyanide facilities). The auditors spot checked the list of evidence from the 2014, 2010 and 2007 audits against the hard and electronic copies on site to verify documents were retained. Appropriately qualified personnel reviewed and approved the construction projects completed during the recertification period including professional engineers and CC&V project Superintendent and QA/QC. QA/QC reports, signed and stamped by professional engineers, state that the projects were constructed in general accordance with the approved design and specifications, as such meets the design intent. Standard of Practice 4.9: Implement monitoring programs to evaluate the effects of cyanide use on wildlife, surface, and groundwater quality. CC&V is: in full compliance with Standard of Practice 4.9 in substantial compliance with not in compliance with Summarize the basis for this finding: The operation is in FULL COMPLIANCE with Standard of Practice 4.9; implement monitoring programs to evaluate the effects of cyanide use on wildlife, surface, and groundwater quality. CC&V has developed written procedures for water sampling and wildlife monitoring. The document entitled “Environmental Sampling Protocol Guide” and the Sample Prep & Shipping Summary specify the details of CC&V Mine Name of Facility __________________________________ Signature of Lead Auditor July 28, 2017 Date July 2017 Report No. 1663584-003-R-Rev0 15