A preliminary investigation into the magnitude of fog occurrence and associated problems in the oil sands area

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  • Water and ice fogs were investigated for the existing situation (GCOS) and a potential situation (GCOS, Syncrude, plus three more plants). Based on meteorological and historical fog data, Fort McMurray Airport experiences 4 to 5 days with ice fog and 18 total days with fog per year. There is potential for ice fog to occur in the Oil Sands Area 10-18 days per year covering 320 to 1580 km2 (2 plants) or up to 4000 km2 (5 plants) under severe persistent conditions. Pollutant concentrations caused by normal low level emissions could increase by 2 -3 times during ice fogs. The potential for pollutant interaction with water fogs is low because plume mixing to the ground during fog occurrence is remote.

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