What is a critical factor to consider when applying non-soil fumigants in a residential area?

When applying non-soil fumigants in a residential area, proximity to food sources and living areas is a critical factor to consider. This is essential because non-soil fumigants can pose health risks to humans and pets if they are applied too close to where people live or where food is stored and prepared. Ensuring a safe distance from these areas helps to mitigate the risk of exposure to harmful chemicals, preventing potential health hazards or contamination of food supplies.

While the type of pests present is important for determining the effectiveness of the fumigant, and cost considerations can play a role in treatment decisions, safety regarding the proximity to daily living environments takes precedence to protect inhabitants. The size of the building may influence the amount of fumigant needed but does not address the safety aspect as directly as the proximity to food and living spaces does.