Which management practice helps prevent contamination of surface and groundwater?

Securing pesticide containers in a vehicle is a best practice that significantly reduces the risk of contamination to surface and groundwater. By ensuring that the containers are securely stored, the likelihood of spills or leaks is minimized. This practice not only protects the integrity of the containers but also helps in preventing accidental exposure to elements that might lead to contamination if a container were to break or leak.

This management practice is critical particularly when transporting pesticides, as any spills could easily enter into nearby water sources, impacting ecosystems and water quality. Properly securing pesticide containers ensures that they are safe from potential hazards while in transit, thus supporting environmental protection efforts.

Other options, while related to pesticide management, do not prioritize the prevention of contamination effectively. Mixing pesticides outdoors increases the risk of unintended environmental exposure. Storing pesticides without secondary containment offers no protection against spills reaching the ground. Applying pesticides during rainfall creates conditions favorable for runoff, thereby increasing the chance of chemicals entering water systems.