Updates Benzo(a)pyrene Emission Estimates for the
The Great Lakes
Commission today released a report
detailing air emissions of benzo(a)pyrene, also known as b(a)p, within the
represents an update of the benzo(a)pyrene emissions estimated in the 2002
regional toxic air emissions inventory released last year. The inventory and
report have been compiled by the air pollution control agencies of the eight
Great Lakes states and the
The report can be used
by the state, provincial governments in the region to further assess the risks
posed by b(a)p in the
Although it is not possible to quantify the change in b(a)p emissions within the region over the past 10-15 years, the report concludes that emissions from many of the sources that are currently well known have declined substantially over that period. Emissions from industrial facilities and automobiles in particular have declined due to the implementation of emission controls. However, measurements in the environment of benzo(a)pyrene have not shown a substantial decline, suggesting the possibility that additional sources exist that are not yet able to be quantified. “Although there has been success in controlling many of the well-know sources, there may be others that we haven’t yet detected or thoroughly studied,” said Tom Tseng of Environment Canada, also a co-chair of the b(a)p working group. “Scrap tire fires, burning agricultural wastes and use of coal-tar and creosote are areas where we believe emissions may be large, but don’t yet have the science to put a number on how large.”
The report concludes that in addition to identifying and estimating emissions from other sources, efforts are also needed to assess the risks posed by benzo(a)pyrene emissions and to more fully compare emissions information with that from our environmental monitoring networks.
The report is available at www.glc.org/air.
For more information,
contact Jon Dettling at 734-971-9135,