Which practice is intended to protect water supplies during pesticide mixing and loading?

Which practice is intended to protect water supplies during pesticide mixing and loading?

• A. Use an air gap or back-flow protection device to protect your water supply when you mix pesticides.
• B. Mix pesticides directly in open basins near streams.
• C. Store pesticides on an impermeable surface without containment.
• D. Dispose of rinsate by pouring it onto soil nearby.

Answer: (A)

Preventing water contamination during mixing and loading hinges on keeping the water supply from drawing in contaminated pesticide solution. The best approach is to install and use an air gap or a backflow protection device between the water source and the mixing area. This creates a physical separation so that pressure changes or accidental siphoning cannot pull pesticide-laden liquid back into the drinking water system. This safeguard helps ensure that drinking water lines stay clean.

Mixing directly in open basins near streams can lead to pesticide solution entering surface water. Storing pesticides on an impermeable surface without containment risks leaks and spills spreading. Disposing of rinsate by dumping it onto soil nearby can contaminate soil and potentially reach groundwater.