Animal life cannot live in water that has a lot of hydrogen sulfide in it. When you have concentrations of greater than 80 ppm of hydrogen sulfide, or you get up to 200 ppm, which is easily done ...

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 ...

The color of the wells on the map reflect the H2S concentrations of their respective leases. If an oil well belongs to a 200-well lease with a reported concentration of 120 ppm, for example ...

Hydrogen sulfide concentrations at 13 of the wells were at least 300 parts per million (ppm)—the maximum reading on the measuring device. Eight other sites had readings over 100 ppm. Exposure to ...

MSA’s XCell Sensor for H2S-LC (low concentration) for use with MSA’s ALTAIR 4X Multigas Detector provides 0.1 ppm H2S resolution with up to 100 ppm range. Sensor meets ACGIH recommendations ...