Modelling and Assessment of Regional Acid Deposition

The Recommendations for the Acid Deposition Management Framework (ADMF) for the Oil Sands Region of North-eastern Alberta (CEMA, 2004), developed by the NSMWG, was endorsed by the Cumulative Environmental Management Association (CEMA) in 2004. The ADMF consists of management objectives based on soil and lake monitoring, as well as modelled effects on soils and lakes that include ""time-to-effect"" predictions. The ADMF has the following stages: 1. Initial development stage: During this stage a number of management framework approaches and criteria were considered and potential acid input (PAI) modelling was conducted (Golder, 2003); 2. Adoption stage: The ADMF was adopted by CEMA and Alberta Environment. 3. ADMF Stage 1 Implementation: Initial implementation of the ADMF considered monitoring based objectives. Stage 1 was initiated following Alberta Environment's adoption of the ADMF; 4. ADMF Stage 2 Implementation: The use of monitoring and ""time-to-effect"" modelling objectives for management action triggers. This implementation stage has been divided into two phases. a. In Phase 1, expert advice and guidance to the approach and inputs that should be used in predictive modelling was obtained. b. In Phase 2, the ADMF was fully applied for managing acid deposition in the Oil Sands Region with modelling used as a tool to determine if the ""yellow"" or ""red"" action levels in the management system have been triggered.

Golder Associated Ltd. (Golder) was retained by the NSMWG to implement Stage 2 of the ADMF, forming the scope of this project.

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Contractor Golder Associates Ltd.
Contract Number 2008-0016