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Rernediation • • Monitoring Measures • <br /> NEWMONT Cyanide Spills • Releases <br /> Sustainability and External Relations <br /> i. Immediate risk to human health and/or the environment <br /> ii. The release entering ground or surface waters <br /> iii. Leak of bulk storage facilities <br /> b. Monitor for HCN gas using a HCN Multigas Detector. Detectors are located in the <br /> Mill Maintenance tool room and the Mine rescue/Safety building. <br /> i. If HCN levels are high evacuate the surrounding area and evacuate <br /> downwind areas. <br /> 2. Control <br /> Generally, stop and contain the release and clean the area if possible. Each department has <br /> spill containment and cleanup procedures to handle incidents which could be considered <br /> routine. CC&V employees should be familiar with their department procedures for <br /> containment and cleanup of spills. Spill response supplies should be kept at each work area, <br /> and employees trained regarding where these supplies are located, and how to properly use <br /> them. The following control methods should be implemented when practical: <br /> a. Control flow by shutting down pumps/valves. <br /> b. Isolate the source of the spill. For example, shut-down machinery, switch off <br /> pumps, pick up the drum, or close valves. <br /> 3. Contain <br /> Contain the area impacted by the spill/release using one or more of the following <br /> methods: <br /> a) Create a temporary earth berm (using hand or mechanical methods) depending <br /> on the size of the spill, to limit the spatial extent of the spill from entering the <br /> environment. <br /> b) Cover drains and gutters. <br /> c) Collect ongoing leaks in spill trays or empty containers. <br /> d) Relocate material or equipment to safe areas. <br /> e) Leave tines or other piercing objects within the spill until the spill can be moved <br /> into a position whereby the material does not jet from the container. <br /> f) Cover solid materials with a tarp or similar if water ingress represents a risk. <br /> 4. Clean up and Remediate <br /> All cyanide releases shall be cleaned-up immediately and the affected area remediated <br /> within 72 hours. Cleanup of the release is completed when the analysis results are <0.20 <br /> ppm WAD CN. The following methods should be implemented were applicable the <br /> cleanup spills: <br /> a) Any pools or puddles of pumpable solution should be pumped to one of the <br /> Absorption, Desorption, Recovery (ADR) facilities or into the High Grade Mill (HGM) <br /> circuit, whichever is closer. <br /> b) Using visual assessment, remove soil which appears to be affected and over <br /> excavate impacted soil to insure that all contaminated soil had been removed. Soil <br /> will be excavated in large scopes and will be removed in layers and disposed of until <br /> all contaminated soil has been removed and soil sampling indicates that the freshly <br /> exposed earth is below the 0.20 ppm WAD CN limit. <br /> -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------7----- ----------------------------------------------------- <br /> Department THIS DOCUMENT IS UNCONTROLLED IN HARDCOPY FORMAT Doc Id:NA-CCV-SER-SOP 2196 <br /> F---------------•---------------------------------------------F-•-•-•-•-----------•-----.-.-------------------------------------------------------------------------------------------•••f---------•-------------------------•-------•-•---•-•-•-•---•-I <br /> SER Date of This Issue: 9/28/2017 Date of Next Review:928/2020 Page 6 of 10 <br />