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Cumberland Resources Ltd.

Cumberland Resources Ltd. MEADOWBANK GOLD PROJECT. NOISE EIS. MEADOWBANK GOLD PROJECT. Noise Impact Overview. Scope. Determine background sound level Calculate permissible sound level (PSL) Identify major noise sources for construction and operation phases Predict ambient noise levels

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Cumberland Resources Ltd.

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  1. Cumberland Resources Ltd. • MEADOWBANK GOLD PROJECT NOISE EIS

  2. MEADOWBANK GOLD PROJECT Noise Impact Overview Scope • Determine background sound level • Calculate permissible sound level (PSL) • Identify major noise sources for construction and operation phases • Predict ambient noise levels • Compare predicted levels to PSL

  3. Background Noise & Permissible Sound Level • Background noise levels are similar to those monitored in the remote areas of Northern Alberta • 42 dBA daytime • 35 dBA nighttime • Permissible sound level is based on Noise Control Directive of the Alberta Energy and Utilities Board (EUB) for remote locations defined for a location 1,500 m from the noise source • 55 dBA daytime • 45 dBA nighttime

  4. Noise Sources • Main noise sources: • construction equipment • the primary crusher • power plant • haul trucks • drills • excavators • loaders • production blast

  5. Noise Modelling • SPM9613 noise prediction model with the following assumptions • modelling includes major noise sources (the primary crusher, screens, excavators, drills, mills, and haul trucks) • mining noise sources are located at the bottom of the pit • 24/7 continuous operation

  6. Sound Level Isopleths • Accommodation zone predicted noise levels will be 60 to 65 dBA

  7. Sound Level Isopleths Project zone predicted noise levels A – Vault site; B – Vault haul road; C – plant site and tailings / waste site; D – Goose Island site

  8. Monitoring Ambient noise monitoring during construction and operation

  9. Mitigation • Avoid trucking operation during nighttime, where possible • Select vehicles with minimum noise output including tire noise, exhaust and compressor/fan noise and check that noise abatement devices are in good order • Position equipment in sheltered locations, e.g. behind the earth berms if possible • Place crushers in sheltered/enclosed locations if possible

  10. Summary • Elevated noise levels will be observed close to the noisy equipment • Noise levels will decrease with the distance from sources • Mining noise will be restricted to the pit area • Noise levels will be monitored • Mitigation methods will be implemented to control noise levels

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