Green Plumbing

Answer: C - A soil that has a strong structure, medium texture, and friable consistence would be the best for safe and effective on-site wastewater treatment. Soils with strong structure have many interconnected pores that facilitate movement of wastewater through the drainfield. Soils with medium texture - no predominance of silt, sand, or clay - offer permeability that is neither too fast nor too slow. Similarly, soils with a friable rather than firm consistence are more permeable.