What is the required minimum separation between drainfield excavations?

The correct answer is based on the established standards for the construction and installation of on-site sewage facilities, specifically regarding the separation between drainfield excavations. A minimum separation of 3 feet helps ensure that the functioning of one drainfield does not adversely affect another. This distance allows for adequate soil absorption and reduces the risk of contamination between adjacent fields.

Proper separation is crucial for maintaining the effectiveness of each drainfield and preventing issues like cross-contamination or reduction in the hydraulic capacity of the soil. Inadequate separation could lead to failure of the systems, resulting in potential environmental hazards and health risks. This 3-foot requirement aligns with guidelines aimed at providing a safe and functional system for wastewater management in both residential and commercial settings.