What should be the first step when responding to a hazardous gas situation in a confined space?

When responding to a hazardous gas situation in a confined space, the first step should involve utilizing gas detection equipment. This is crucial because it helps to identify the presence, concentration, and type of gas in the environment before any further action is taken. Understanding the specific hazards present is vital for ensuring the safety of both responders and personnel in the area.

Entering the space without this critical information could expose individuals to potentially life-threatening conditions. Securing the area is also important, but this step typically follows gas detection, as one must first understand the danger before initiating containment. Notifying the safety officer is necessary as part of protocol for such situations, but it should come after assessing the immediate hazards using detection equipment. Properly using gas detection allows responders to make informed decisions on how to proceed safely.