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In Ontario, Designated Substances are governed by the Occupational Health and Safety Act and specific regulations are made under the Act for each substance.


The current list of Designated Substances includes:


  • Asbestos
  • Lead
  • Silica
  • Mercury
  • Arsenic
  • Benzene
  • Isocyanates
  • Vinyl chloride monomer
  • Ethylene oxide
  • Acrylonitrile
  • Coke oven emissions



The services offered by Maple Environmental address the needs and regulatory requirements of our clients from both a construction and a manufacturing perspective.  Services offered in this area include:


  • Identification and inventory
  • Abatement design, inspection and air monitoring
  • Assessments
  • Control programs
  • Respirator protection programs
  • Medical surveillance programs


Under the Act, a Designated Substance survey of building materials must be performed prior to renovation or demolition.  Further, where any of the Designated Substances are used in a manufacturing process, a control program must be instituted.

Maple’s focus is on providing quality consulting services for Asbestos, Lead, Mould, Indoor Air quality, Environmental Site Assessments and Occupational Hygiene.

Contact Us

Head Office:

482 South Service Road East,

Suite 116

Oakville, Ontario

L6J 2X6


Phone: 905.257.4408


Fax: 905.257.8865

GTA East:

1735 Bayly Street,
Suite 7C1

Pickering, Ontario

L1N 3G7

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