co2 monitoring Tag

How visitation is affecting the air quality in Carlsbad Cavern Carbon dioxide is a naturally occurring gas in Earth’s atmosphere, but in high concentrations, the gas can act as an asphyxiant. OSHA and other government agencies recommend a 5,000 parts per million (ppm) workplace exposure limit of 8 hours...

The framework starts with defining the limits of acceptable change, or the minimally acceptable conditions, then developing and carrying out monitoring studies, if the data show the park has surpassed the limits of acceptable change, then park management must take an action to address this....