According to the MultiRAE Lite SOG, what is the sensor high alarm level for hydrogen sulfide?

The sensor high alarm level for hydrogen sulfide in the MultiRAE Lite Standard Operating Guidelines is established at 20 parts per million (ppm). This level is determined based on the potential health risks associated with exposure to hydrogen sulfide gas, which can be highly toxic. At concentrations as low as 10 ppm, workers may begin to experience symptoms, but the high alarm level is set at 20 ppm to ensure a proactive approach to safety. This allows personnel to take necessary precautions and evacuate if necessary before reaching levels that could lead to serious health consequences.