August 15, 2011--
The Sydney Tar Ponds Agency is reporting an air exceedance at its Victoria Road fixed air monitoring station located in Sydney.
Data collected as part of the project's Ambient Air Monitoring Program confirms that there was an exceedance of Benzo(a)pyrene. The sample showed a value of 1.42 nanograms per cubic metre (ng/m3) over a 24-hour period ending midnight, August 2, 2011. The 24-hour criterion for the project is 1.1 ng/m3. Dust levels sampled during real-time air monitoring did not report any dust exceedances from project activities.
Benzo(a)pyrene is an odourless, polycyclic aromatic hydrocarbon (PAH) typically distributed during the incomplete combustion of fossil fuels. It is present in automobile and diesel exhaust, and can be produced by various activities such as backyard fires, coal burning, and cigarette smoke. The exact source of the exceedance is under investigation.
The project's fixed stations measure air quality for a 24-hour period, corresponding with the six-day National Air Pollution Surveillance (NAPS) schedule. The samples results are tested and results are reported to the Agency within about two weeks.