is a tasteless and odourless natural element widely found in the
earth's crust. Inorganic arsenic compounds are primarily used as
pesticides and wood preservatives. Exposure to arsenic typically
occurs through ingestion of contaminated drinking water or through
inhalation of airborne particulates. These particulates are usually
released into the environment through the burning of fossil fuels
(especially coal), metal production (such as gold and base metal
mining), agricultural use (in pesticides and feed additives), or
by waste burning.
Arsenic is not absorbed through the skin but contact may cause redness
and swelling. Inhalation of arsenic can cause abdominal pain, muscular
cramping, weakness and flushing of the skin, thickening of the palms
and soles, and deterioration of motor and sensory response. Chronic
exposure to arsenic can cause nausea and diarrhoea, skin discolouration,
decreased production of red and white blood cells, abnormal heart
rhythm, damage to blood vessels, and a numbness in hands and feet.
there are no regulations pertaining to arsenic on construction projects.
Industrial processes involving arsenic are regulated under the Ontario
Occupational Health & Safety Act, R.S.O. 1990, Regulation 836
as amended by O.Reg. 102/04, Designated Substance – Arsenic.
The transport of the waste to the disposal site is controlled by
the federal Transportation of Dangerous Goods Act, 1992.