What is the permissible exposure limit for H2S?
20 ppm
OSHA: The legal airborne permissible exposure limit (PEL) is 20 ppm not to be exceeded at any time, and 50 ppm as a maximum peak, not to be exceeded during any 10-minute work period.
What is the Safe Work Australia Short-Term Exposure Limit STEL for H2S gas in a workplace?
5 ppm
Based on the Page 2 Hydrogen sulfide (7783-06-4) Safe Work Australia — 2019 2 local irritation effects at 5 ppm and the potential for short-term peaks in exposure, a STEL of 5 ppm is recommended to protect for acute irritation effects and CNS impairment in exposed workers.
What air contamination level must be exceeded for H2S exposure to cause death?
Above 500 Immediate loss of consciousness. Death is rapid, sometimes immediate. H2S levels of 100 ppm and higher are considered immediately dangerous to life and health (IDLH).
What is the 8 Hours Threshold Limit Value TLV of hydrogen sulphide H2S?
1 ppm
ACGIH® recommends a threshold limit value (TLV®) of 1 ppm as an 8-hour time weighted average (TWA) and a short-term exposure limit (STEL) of 5 ppm.
How long is the Wel recommended TWA reference period?
An 8-hour TWA exposure standard is based on exposure that occurs in an 8-hour working day, 5-day working week.
What is Peak limitation?
Peak limitation means a maximum or peak airborne concentration of a substance determined over the shortest analytically practicable period of time which does not exceed 15 minutes.
What is the occupational exposure limit OEL of H2S for 8 hours?
10 ppm
The 8-hour OEL is 10 ppm, and the ceiling OEL is 15 ppm. If work shifts are longer than 8 hours, the exposure limit must be reduced. OELs apply to all workers who may be directly or indirectly exposed to hydrogen sulphide in the workplace.
Why is there a hydrogen sulphide safety alert in NSW?
This safety alert is for NSW workplaces which may use, generate, store or handle hydrogen sulphide (H 2 S) gas. It will help them to identify sources of potential exposure and manage risks to health and safety.
What are the exposure standards for hydrogen sulphide?
Exposure Standard Details Standard Name Hydrogen sulphide Exposure Standard Synonym Cas Number 7783-06-4 Time Weighted Average (parts per million 10 Time Weighted Average (mg/m 3) 14
Where does hydrogen sulfide come from in Australia?
In Western Australia some coastal communities have been exposed to hydrogen sulfide generated by the breakdown of seaweed that has accumulated on the shore line. Hydrogen sulfide has also been found to contaminate bore water and surface water bodies, usually at low levels,…
What happens if you get exposed to hydrogen sulphide?
Exposure can cause serious injury, illness or death from fluid on the lungs and the body’s inability to use oxygen. Death can happen almost instantly. Hydrogen sulphide is a highly flammable gas and can be explosive.