INDUSTRIAL:
High noise levels can be cause for occupational hearing loss if a person is exposed for long periods of time. On the other hand, even lower levels can be annoying and can cause work interference.  
  Hearing Conservation
 
Sound level surveys
 
Noise exposure surveys and assessments
 
In plant noise control
 
Hearing conservation programs: development and implementation
 
WSIB review and assessment
 
HVAC noise control Annoyance and Work Interference
 
Office noise assessment and control
 
Lunch and control rooms design with respect to noise control

ENVIRONMENTAL:
The Ontario Ministry of Environment has instituted requirements for new establishments as well as for modifications of existing one.
  For the MOE
 
Documentation for Certificate of Approval (Air)
 
Acoustic Audit Noise Impact Assessment