Any CO reading above what ppm should be reported to the Incident Commander in roadway tunnels?

In roadway tunnel situations, carbon monoxide (CO) levels can pose significant health risks due to limited ventilation and the potential for rapid buildup of this toxic gas. The trained threshold for reporting CO levels is set at 25 parts per million (ppm). This level is established based on safety standards and guidelines, indicating that even low levels of CO can lead to hazardous conditions in enclosed spaces like tunnels.

When CO readings exceed 25 ppm, it is crucial to report these findings to the Incident Commander. This ensures that appropriate safety measures can be taken to protect responders and the public. CO is particularly dangerous because it is colorless, odorless, and can cause symptoms ranging from headaches and dizziness to severe health repercussions, including unconsciousness and death, depending on exposure levels and duration.

In this context, any reading above 25 ppm signifies escalating danger and necessitates immediate communication with the command structure to facilitate rapid response and mitigation efforts, thereby safeguarding the well-being of all individuals in the area. Understanding these thresholds helps ensure that safety protocols are followed and that appropriate actions are taken in emergencies involving CO exposure.