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Ryan Dignard and Charles Geen attended the Occupational Hygiene Association of Ontario (OHAO) Symposium this fall which featured several presenters and vendors all related to workplace health and safety. ?

Presentations topics included:

  • Occupational Hygiene in Emerging Countries
  • Writing Quality MSDSs
  • Updates from the Ministry of Labour
  • Noise from Wind Turbines
  • Indoor Non-Industrial Noise Reduction
  • Remediation of Large Scale Methamphetamine Labs
  • Occupational Hygiene and LEED Buildings

Overall the Symposium was informative by bringing awareness to changes in legislation and by identifying new avenues and opportunities requiring occupational hygiene attention. ? Key points that should be noted include:

MOL Changes to Ontario Regulation 833 that came into effect on July 1, 2010. ? These can be found by visiting the MOL website ?or by contacting Airzone directly. ? The changes include but are not limited to:

  • The creation of O.Reg 491/09 which introduced a new format for Occupational Exposure Limits (OEL) listings
    • The “Ontario Table” contains approximately 135 listings where Ontario limits differ from the ACGIH and also include the designated substances.
    • The “ACGIH Table” – reference to limits set forth in the ACGIH 2009 TLV handbook.
    • Rules for using the tables include referencing the Ontario Table first and if not listed then referencing the ACGIH Table. In either case the TWA, STEL, or C cannot be exceeded.
  • The creation of O.Reg 490/09 which introduced a combined table for all designated substances and revoked the individual designated substance regulations. OELs remained at current values for all 11 designated substances.
  • LEED Certification is becoming very popular in Canada and the US as building owners and managers try to reduce their impact on the environment. The difficulty is in finding a balance between reducing environmental impact and negatively impacting the occupants of the building. Occupational hygiene practices can play a role in determining and preventing unwanted hazards in office spaces such as “sick building syndrome”. Airzone’s experience in conducting Indoor Air Quality (IAQ) assessments can help to identify indoor air contamination which can then be compared to governmental guidelines to ensure occupant safety.

If you would like further information on any of the topics listed above or if we can help you with any questions or assessments relating to Occupational Hygiene, please contact us and we will be more than happy to assist you with your needs.

Ryan Dignard (905)-890-6957 ? Ext. 103 or 416-892-6924

Charles Geen: (905) -890-6957 ? Ext. 104