The following is an exert from the Comprehensive Study Report (CSR). The full context of the topic of air quality is attached in the pdf below. There is also an air quality "Fact Sheet" attached below.

GENERAL

"The Proponent’s January 2005 Environmental Assessment Application presents analyses of the air quality and associated human health and wildlife impacts of the proposed Project through an examination of existing air quality in the Project area, and predictions of future air quality and human health and wildlife impacts associated with emissions from DP3 and from other sources in the region.

The assessment consisted of an issue scoping exercise to determine the air quality issues relevant to the DP3 Project. Emission sources were identified, and their associated emission parameters were quantified. A review of ambient air quality observations was also undertaken to define background air quality. Dispersion models were used to predict ambient air quality concentrations due to emissions associated with each assessment scenario, for a total of four different assessment scenarios. Model prediction results were then analyzed to determine the incremental air quality changes due to the DP3 Project (construction and operation), expressed as a percent change and assessed for significance of the predicted air quality changes. Model prediction results were compared to federal, provincial and regional air quality objectives and standards.

During the review of the Application, the Proponent retained additional technical air quality experts to conduct an independent examination of the air quality and human and wildlife health risk assessment. This review identified that wind speeds at one meteorological station (Westshore Terminals) were actually higher in velocity than those used in the air quality model. The Proponent undertook an amendment to the air quality chapter in the Application by remodeling all of the emission scenarios with the correct wind speed. Based on the re-modeling, the Proponent’s technical consulting team concluded that the corrected wind speeds did not change the overall environmental assessment conclusion of the Application. The air quality chapter for this report is based on the amended chapter that was submitted by the Proponent to the EAO on December 1, 2005, and subsequently made available for public comment in December 2005 and January 2006."

CONCLUSIONS ON SIGNIFICANCE OF EFFECTS

During this cooperative environmental assessment, the EAO, the RAs and the working groups have considered: the Application; comments from government agencies, First Nations and the public on the potential effects of the Project; responses by the Proponent; and the discussions of the working groups.

Based on the information summarized in this CSR and provided that the Proponent implements the actions described in the Owner’s Commitments and Assurances as listed in Appendix A of this report, the RAs are satisfied that the DP3 Project will not likely result in significant adverse effects on air quality and human and wildlife health in the study areas.