What should be done before entering an area suspected of containing hazardous materials?

Ensuring proper training and equipment is crucial before entering an area suspected of containing hazardous materials. This preparation is key to protecting both the responder's safety and the safety of others. Proper training equips individuals with the knowledge of hazardous materials' potential risks, signs of exposure, and emergency procedures.

Additionally, having the right equipment, such as personal protective gear and monitoring devices, minimizes the risk of harmful exposure during the assessment or intervention. This approach allows for a more controlled and effective response in potentially dangerous environments, complying with safety regulations and best practices in emergency response.

In contrast, while avoiding entry or contacting local authorities may seem prudent, they do not address the individual's readiness or ability to safely engage with the situation if necessary. Conducting air testing is an important step but should ideally follow the initial preparations regarding training and equipment to ensure responders can react appropriately upon entry.