If a pesticide storage floor is evaluated, which material is least suitable?

• A. Wood
• B. Dirt
• C. Concrete
• D. Coarse Gravel

Answer: (A)

Materials chosen for a pesticide storage floor must be impervious to spills, chemically resistant, and easy to clean and decontaminate. Wood falls short because it is porous and can absorb liquids, making any spilled pesticide soak in and linger. That absorption makes it much harder to remove residues, increasing the risk of worker exposure and environmental contamination. Wood can also swell, warp, or rot when exposed to moisture, and many pesticides include solvents that can degrade or degrade wood coatings, creating leaks or gaps. In addition, wood is more flammable than typical concrete or sealed surfaces, posing an extra safety concern with flammable or volatile pesticide products. Concrete, when properly sealed, provides a non-porous, durable surface that’s easier to sweep up spills and rinse away residues. Dirt and coarse gravel require additional containment measures to prevent seepage and contamination, but with proper lining or drainage they can be used in some setups; without those controls they’re not as suitable as a sealed, impervious surface.