Benzo(a)pyrene in the ambient air in Baie-Comeau is measured at three sampling stations. A fourth sampling station was installed in 2010 on Bienville Street in the Saint-Georges neighborhood. This new station was added to better assess the prevailing conditions in the area. We have noted that the concentrations recorded at this station are much lower than those observed at Station 1 on Bouchette Street, although the Bienville station is located closer to the smelter.
The results reported from these stations, which can vary according to prevailing winds on sampling days, are the average of approximately 25 annual samples.