Estimating long term ground level concentrations of sulfur di oxide from short term peak data

Herman, M.N.

Journal of the Air Pollution Control Association 30(6): 676-678


ISSN/ISBN: 0002-2470
Accession: 005386339

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Maximum concentrations of SO2 vary approximately inversely as the square root of the averaging time for periods up to 1 yr, a much longer time period than those reported previously. This finding is based on analyses of SO2 and tracer gas concentrations measured in the vicinities of a test stack, a petrochemical complex and 8 power plants. For a given set of emission conditions, long-term concentrations of SO2 and other conservative pollutants emitted by well defined sources can be rapidly estimated from maximum short-term concentrations, and vice versa. The scatter in the data corresponds to an estimation error of about a factor of 3 for averaging time conversions of 1 day to 1 yr. This is approximately the same error associated with conventional calculations. Use of averaging time conversions is justified as a rapid screening technique to estimate compliance with ambient air quality standards.