Tahera Environmental Monitoring Commitments Summary

• Use TK in monitoring; cooperate with communities

• Collect reliable information that will:

• Allow detection of a change in aquatic biota caused by the Project

• Test predictions of Project impacts

• Focus on components that are good indicators

• Use accepted sample design and methods

• Invest sufficient effort in order to detect change

Tahera Environmental Monitoring Commitments Summary

• Geotech– Dam stability– C1 Diversion– C4 Ditch– Waste dumps– Stockpiles

Tahera Environmental Monitoring Commitments Summary

• Mine Wastewater Discharge– Monitor mine waste management facilities

• seeps

• groundwater

• effluent

Tahera Environmental Monitoring Commitments Summary

• Water Quality– Add water quality monitoring site(s) downstream

Jericho River on IOL

– Add 2nd control site in adjacent drainage basin

– Monitor C3 and Carat lake O2 prior to mine discharge

Tahera Environmental Monitoring Commitments Summary

• Aquatic Effects Monitoring• Potential Impacts Monitored

• Nutrient loading

• Sedimentation

• Contaminants

• Components • Sedimentation (rate of sedimentation)

• Periphyton (biomass and species diversity)

• Phytoplankton (biomass) and zooplankton (species diversity)

• Benthic invertebrates (abundance and species diversity)

• Fish (metals, community and population structure)

Tahera Environmental Monitoring Commitments Summary

• Air Quality– PM-10 and PM-2.5 at the mine site– Indirect vegetation monitoring

• lichen

• transects at right angles to dust sources

Tahera Environmental Monitoring Commitments Summary

• Wildlife– Cooperate in monitoring of Bathurst caribou

herd– Raptors – annual nesting success– Record and report wildlife events/responses

Tahera Environmental Monitoring Commitments Summary

• Post closure monitoring– Performance of PKCA and other waste

structures– Water quality– Reclamation success