WebApr 1, 2003 · Hydrogen sulfide (H2S) is a toxic gas with an offensive odour reminiscent of rotten eggs. There is the potential for widespread occupational exposure to H2S, including in the oil and water treatment industries. There is a particular concern for exposure in confined spaces such as manholes and sewer pipes; the high concentrations that can build up in … WebJul 17, 2024 · In the past, the most widely recognized occupational exposure limits for hydrogen sulfide (H 2 S) have referenced an 8-hour TWA of 10 ppm, and a 15-minute Short-Term Exposure Limit (STEL) of 15 ppm. In …
Monitoring H2S to Meet New Exposure Standards
WebJul 16, 2024 · The units of the Threshold Limit Values are measured in parts per million (ppm) for gases and in milligrams per cubic meter (mg/m³) for subatomic particles such as smoke, dust and mist. The esteemed formula for converting between ppm and mg/m³ for gases is ppm = (mg/m^3) * 24.45 / molecular weight. WebOccupational exposure limits (OELs) are regulatory values which indicate levels of exposure that are considered to be safe (health-based) for a chemical substance in the air of a workplace. gro protect solutions in stores
CDC - NIOSH Pocket Guide to Chemical Hazards - Hydrogen sulfide
WebApr 5, 2024 · Threshold Limit Value – Time-Weighted Average (TLV-TWA): the time-weighted average concentration of a hazardous substance in the air averaged over an 8-hour workday and a 40-hour workweek to which it is believed that workers may be repeatedly exposed, day after day, for a working lifetime without adverse effects. WebJun 27, 2024 · Find AEGL values in the table below using the chemical name or its CAS number. The AEGL values page will also have a link to the appropriate technical support document. If only a chemical's synonym is known, it is necessary to first find that chemical's CAS number to access the AEGL entry. To find the CAS number, enter the chemical … WebH₂S Conversion 1 ppm = 1.40 mg/m 3 IDLH 100 ppm See: 7783064 Exposure Limits NIOSH REL C 10 ppm (15 mg/m 3) [10-minute] OSHA PEL C 20 ppm 50 ppm [10-minute maximum peak] See Appendix G Measurement Methods NIOSH 6013; OSHA ID141 See: NMAM or OSHA Methods Physical Description Colorless gas with a strong odor of rotten eggs. filibertos 75th ave and lower buckeye