. Annual program report, 1989. Acidic Precipitation in Ontario Study; Acid precipitation (Meteorology); Acid pollution of rivers, lakes, etc; Acid rain. Figure 13. Annual SO4 wet deposition in Ontario (average for 1981-1986).. Figure 16. Annual SO4 dry deposition in Ontario (average for 1981-1986). D. OXIDANTS STRATEGY DEVELOPMENT ADOM (the Atmospheric Deposition and Oxidant Model) was used to assess the relative contribution of hydrocarbons and nitrogen oxides to ambient oxidant levels in Ontario. These runs, already referred to in Section B, suggested that control of local nitrogen oxide emi
. Annual program report, 1989. Acidic Precipitation in Ontario Study; Acid precipitation (Meteorology); Acid pollution of rivers, lakes, etc; Acid rain. Figure 13. Annual SO4 wet deposition in Ontario (average for 1981-1986).. Figure 16. Annual SO4 dry deposition in Ontario (average for 1981-1986). D. OXIDANTS STRATEGY DEVELOPMENT ADOM (the Atmospheric Deposition and Oxidant Model) was used to assess the relative contribution of hydrocarbons and nitrogen oxides to ambient oxidant levels in Ontario. These runs, already referred to in Section B, suggested that control of local nitrogen oxide emissions would be more effective than hydrocarbon emissions control for lowering oxidant levels. Also, most of the oxidant burden in Ontario was attributed to emissions in the United States. A further analysis of the extensive Ontario data during the 1984 Sarnia Oxidant Study confirmed the above conclusions. A draft oxidant control strategy document was prepared, which recommends that (bearing in mind the relatively minor contribution to oxidant levels in Ontario due to local sources, and the substantial costs of control), the provincial government take no additional steps beyond the initiatives already being considered to control oxidant precursor emissions. These initiatives include substantial reductions in hydrocarbons and nitrogen oxide emissions due to revisions in Regulation 308 of the Environmental Protection Act, the adoption of California tailpipe emission standards for light duty vehicles, and a more rigorous vehicle inspection program. The cost of hydrocarbon and nitrogen oxide emission controls for point sources in two industrial areas - Sarnia and the Hamilton-Toronto- Oshawa metropolitan area was assessed, for various control scenarios. The various scenarios and costs are discussed in the Environmental Management and Economics section. E. METEOROLOGICAL STUDIES A meteorological data acquisition system (MDAS), capable of providing support for special studies and epi
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