Why is posting of treated sites necessary?

Posting of treated sites is essential primarily to reduce exposure risk and to inform residents. When a pesticide is applied to a particular area, there may be potential hazards to humans, pets, and the environment immediately following the treatment. By posting signs indicating that a pesticide has been used, it helps to communicate this information to individuals who may enter the area, thereby minimizing the risk of unintended exposure to harmful chemicals.

Informative postings can include details like the type of pesticide used, the areas treated, and any re-entry intervals that need to be observed. This ensures that residents and visitors are adequately informed and can take necessary precautions, such as keeping children and pets away from treated areas until it is safe to return.

In contrast to the other options, which may not directly address safety or legal requirements, the focus here is strictly on protecting the health of the public and minimizing risk associated with chemical applications.