#Osha breathing zone how to#
This web page provides information on how hydrogen sulfide can affect your health, where you might find it, and how to prevent harmful exposures. Effects range from mild, headaches or eye irritation, to very serious, unconsciousness and death. However, many effects are seen even at low concentrations. The health effects of hydrogen sulfide depend on how much H 2S a worker breathes and for how long. Its presence makes work in confined spaces potentially very dangerous. Because it is heavier than air, hydrogen sulfide can collect in low-lying and enclosed spaces, such as manholes, sewers, and underground telephone vaults. Hydrogen sulfide also occurs naturally in sewers, manure pits, well water, oil and gas wells, and volcanoes. Hydrogen sulfide is used or produced in a number of industries, such as It is extremely flammable and highly toxic. Hydrogen sulfide (also known as H 2S, sewer gas, swamp gas, stink damp, and sour damp) is a colorless gas known for its pungent "rotten egg" odor at low concentrations.
It states that “dusts, gases, fumes, vapours and mists found in the workplace environment shall be measured in the respiratory zone of workers or, if this proves to be impossible owing to the lack of equipment for taking sampling in this zone, then outside the breathing zone but in a place located as close as possible to such zone” (Division V: Air Quality: 44 Methods). Recently, Quebec’s regulation has reinforced CETCI’s recommendations.
(CETCI) has always recommended that they be installed in the breathing zone. In contrary, Critical Environment Technologies Canada Inc. In the past, vehicle exhaust gas detectors have been installed on or near the ceiling.