Where should training be performed when it is not possible to meet water runoff containment requirements?

The selected choice emphasizes that when it is not possible to meet water runoff containment requirements, training should be conducted on a nonporous concrete surface. This is primarily because nonporous surfaces are designed to prevent water and contaminants from seeping into the ground, thereby containing any potential pollutants that might arise from training activities. This approach minimizes environmental impact, ensuring that any runoff can be managed more effectively, which is essential when dealing with hazardous materials or equipment in a training scenario.

A grassy field, while natural, can absorb runoff water and potentially lead to contamination of soil and groundwater, which is counterproductive to the containment requirements. An indoor training facility, although it minimizes outdoor runoff, might not always be suitable depending on the nature of the training being conducted. Lastly, conducting training near a water source raises significant concerns about contamination and impact on water quality. Therefore, the choice of a nonporous concrete surface aligns well with best practices for managing runoff during training exercises.