What is the Vermont OSHA exposure limit for carbon monoxide over an 8-hour period?

The Vermont OSHA exposure limit for carbon monoxide over an 8-hour period is established to safeguard workers from the potential hazards associated with this toxic gas. The correct answer reflects that the permissible exposure limit is set at 35 parts per million (ppm). This standard is designed to minimize the risk of both acute and chronic health effects that can arise from prolonged exposure to carbon monoxide, which impairs the blood's ability to carry oxygen throughout the body. Setting the limit at 35 ppm ensures that, during an 8-hour workday, workers are kept safe and that adequate safety measures are in place to protect their health.

The other choices indicate higher or lower thresholds that do not align with the established guideline. Those limits could either result in inadequate protection for workers, allowing for potential health risks, or are set at levels that have not been found appropriate for ensuring safety in occupational environments. By adhering to the 35 ppm standard, regulatory bodies aim to maintain a safe working atmosphere for employees exposed to carbon monoxide.