A hazardous atmosphere (toxic gases, flammable atmosphere) is not present. Ventilation equipment is operating properly. Hazards are controlled in confined space area via engineering controls, ...

We often take indoor air quality even though it has pollutants from outside and those released indoors. The Air Quality Index (AQI) measures eight primary air pollutants: particulate matter (PM2.5 and ...

Specific hazards of a permit-required confined space include one or more of the following characteristics: Contains or has the potential to contain a hazardous atmosphere; Contains an engulfing ...