The new recommendations for airborne H2S exposure are a TWA of 1 ppm and an STEL of 5 ppm. While compliance with these recommendations is not mandatory, they were developed from scientific data ...

EXPOSURE to high levels of hydrogen sulfide gas is a well-documented and understood hazard. OSHA and NIOSH standards have long recognized this acute risk with appropriate short-term maximum ...

Hydrogen sulfide concentrations at 13 of the wells were at least 300 parts per million (ppm) — the maximum reading on the ...

Hydrogen sulfide is often referred to as H2S ... the chemical is highly flammable and potentially lethal in high exposure. Harris County Pollution Control monitors for the chemical because ...

Studies have linked chronic low-level H2S exposure to neurological and other health problems. Texans living near facilities leaking the gas describe headaches, nausea, eye and nose irritation ...