2006

MEADOWBANK GOLD PROJECT

Cumberland Resources Ltd.

NOISE EIS

2006

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

MEADOWBANK GOLD PROJECTMEADOWBANK GOLD PROJECT

Scope Scope Noise Impact Overview

2006Background 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

2006Noise Sources

Main noise sources:-construction equipment -the primary crusher-power plant-haul trucks-drills-excavators-loaders-production blast

2006Noise 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

2006Sound Level Isopleths

Accommodation zone predicted noise levels will be 60 to 65 dBA

2006Sound Level Isopleths

Project zone predicted noise levelsA – Vault site; B – Vault haul road; C – plant site and tailings / waste site; D – Goose Island site

2006Monitoring

Ambient noise monitoring during construction and operation

2006Mitigation

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

2006Summary

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