Is it acceptable to substitute a percolation test for a site evaluation?

Substituting a percolation test for a site evaluation is not acceptable because these two assessments serve different purposes and provide different types of information critical to the proper design and installation of a septic system.

A site evaluation is a comprehensive assessment that considers multiple factors, such as soil characteristics, groundwater levels, and site conditions. It is essential for determining the suitability of a location for a septic system and ensuring that the system will function properly without risking contamination of groundwater or nearby water bodies.

On the other hand, a percolation test specifically measures the rate at which soil absorbs water. While this information is important, it does not provide a complete picture of the environmental conditions affecting a septic system's performance. Relying solely on the percolation test could lead to poor site selection and potential failures of the septic system, which could have serious environmental and health implications.

Hence, a comprehensive site evaluation is necessary to determine the best locations and designs for septic systems, making it clear that a percolation test cannot substitute for this critical process.