Which of the following is critical after completing a fumigation?

Conducting air quality monitoring after completing fumigation is essential to ensure the safety of individuals who may enter the treated area. Fumigants can linger in the environment, and monitoring air quality helps determine whether the concentration of hazardous chemicals has dropped to a safe level. This step is vital to assess whether it is safe for personnel or the public to re-enter the area without risk of exposure.

Other options, such as immediate re-entry into the treated area or removing personal protective equipment, are not advisable until it has been confirmed that the air quality is safe. Failure to report any findings would also not guarantee safety, but rather possibly endanger others who may inadvertently enter the area without awareness of potential risks. Hence, air quality monitoring is a critical practice to ensure compliance with safety protocols and protect public health.