Off-site air monitoring following methyl bromide chamber and building fumigations and evaluation of the ISCST air dispersion model
Conference
·
OSTI ID:214554
- Cal EPA, Sacramento, CA (United States); and others
The Department of Pesticide Regulation`s preliminary risk characterization of methyl bromide indicated an inadequate margin of safety for several exposure scenarios. Characterization of the air concentrations associated with common methyl bromide use patterns was necessary to determine specific scenarios that result in an unacceptable margin of safety. Field monitoring data were used in conjunction with the Industrial Source Complex, Short Tenn (ISCST) air dispersion model to characterize air concentrations associated with various types of methyl bromide applications. Chamber and building fumigations were monitored and modelled. For each fumigation the emission rates, chamber or building specifications and on-site meteorological data were input into the ISCST model. The model predicted concentrations were compared to measured air concentrations. The concentrations predicted by the ISCST model reflect both the pattern and magnitude of the measured concentrations. Required buffer zones were calculated using the ISCST output.
- OSTI ID:
- 214554
- Report Number(s):
- CONF-950801--
- Country of Publication:
- United States
- Language:
- English
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