Who is ultimately responsible for ensuring worker compliance with WPS restricted entry intervals?

The correct answer is the agricultural employer, as they hold the primary responsibility for ensuring that all workers comply with the Worker Protection Standard (WPS) restricted entry intervals. This includes ensuring that employees do not enter treated areas until the required amount of time has passed since the application of pesticides. The agricultural employer must implement effective training, communicate the necessary safety information, and monitor adherence to these regulations to protect the health and safety of workers.

This responsibility stems from the employer's overarching role in maintaining workplace safety and compliance with federal regulations. By ensuring that appropriate measures are taken to inform and protect workers, the agricultural employer plays a crucial role in preventing pesticide exposure, thus safeguarding both the workforce and the environment.