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Air

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Environmental technician monitoring worker air quality

Air quality monitoring began on the day of the derailment to monitor for the presence of contaminants related to the fire.  Air monitoring was conducted in the community, around the work site perimeter, and in worker breathing zones at the derailment site. 

 Community Monitoring

Community air monitoring began on the day of the derailment and continued every day until March 10, 2015.  Note: the fire at the derailment site was fully extinguished before community air monitoring concluded.  Air quality readings were collected from the community of Gogama, the Mattagami First Nation reserve, and the surrounding roads and highways.  Parameters monitored included total volatile organic compounds, benzene, hydrogen sulfide, lower explosive limit, carbon monoxide, oxygen, and particulate matter.  The air quality measurements collected from these areas indicate no air quality concerns for the surrounding community including the residents of Gogama and Mattagami First Nation.

 Work Site Perimeter Monitoring

Site perimeter monitoring began on the day of the derailment and continued every day until the cleaning of the tank cars was completed on March 19, 2015.  Stationary monitoring equipment was deployed to monitor and record concentrations of parameters at the work site boundary.  The air quality measurements collected from the site perimeter indicate no air quality concerns for the surrounding community including the residents of Gogama and Mattagami First Nation.  

 Worker Air Monitoring

CN continued to monitor air quality during specific activities at the site, related to the transferring of liquid waste (oil and water mixture) from on site storage tanks, to tanker trucks which transport the waste to an approved facility in Guelph.  This air monitoring was conducted to ensure the health and safety of workers.

 

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