What must be done before a person enters a confined space with potentially harmful atmospheres?

• A. Ensure a first aid kit is present
• B. Ensure tests determine harmful vapours and oxygen content
• C. Confirm all employees are trained in confined space entry
• D. Sign an agreement for liability waiver

Answer: (B)

Before entering a confined space where potentially harmful atmospheres may exist, it is essential to conduct tests that determine the presence of harmful vapours and the oxygen content. This is crucial because confined spaces can accumulate toxic gases or have insufficient oxygen, which poses severe health risks to individuals. Utilizing gas detection equipment to check for these factors ensures that the atmosphere is safe for workers to enter.

Monitoring the atmosphere not only helps in identifying any immediate danger from toxic vapours but also ensures that the oxygen levels fall within safe limits necessary for human respiration. Proper testing and monitoring are foundational steps in establishing a safe work environment in confined spaces. Without this assessment, individuals could unknowingly place themselves in life-threatening situations.

While having a first aid kit, ensuring all employees are trained, and signing a liability waiver are important considerations for workplace safety protocols, they do not address the immediate atmospheric dangers present in a confined space. Ultimately, assessing the air quality is the most critical step before any entry can occur.