††††††††††† Managing Odours
is difficult. The impacts of an odour event, including the number of complaints
arising from the event, can be influenced by five factors Ė frequency (F),
intensity (I), duration (D), offensiveness (O) and location (L) of the event
(FIDOL). People will tolerate an odour for only about 10 minutes before
Operations that commonly cause odours include: iron
and steel production, oil refineries, foundries, rendering and food processing,
landfills, sewers, and paint and printing operations. These pollutants can
also react with other pollutants to create odorous by-products. Odour is typically caused by a mixture of compounds, which
is why odour is often so difficult to describe.
Moreover the intensity of odours varies with industry
location, size, and type, production practices, season, temperature, humidity, time of day, and wind speed and direction. The
presence of other odours, e.g., exhaust fumes or smoke,
can also intensify an odour or mask an odour.
Human reactions to industrial odours are influenced
by personal preferences, opinions, experiences, and olfactory system
sensitivity. One personís perception of odour can be
quite different from another personís and can vary over time. People can become
less sensitive after repeated exposures to an odour,
while others, more sensitive. Furthermore, some people may enjoy a particular odour, e.g., roasting coffee, while others may find the
same odour annoying.
††††††††††† Schedule 3 of O. Reg. 419/05 was
amended to include 10-minute odour-based standards
for Total Reduced Sulphur (TRS), hydrogen sulphide (H2S) and mercaptans
that were calculated using 50 per cent Odour
Detection Threshold (ODT). Facilities will be required to comply with the new
standards by 2013 unless they have been phased in earlier or have been approved
to use another standard.
To Report an Odour Complaint:
Ministry of the Environment
Monday to Fridays -
Any other time call the 24-hour Spills
Action Centre at 1-800-268-6060