What is the recommended procedure if a percolation rate exceeds 120 minutes per inch on a small parcel of land?

When the percolation rate exceeds 120 minutes per inch on a small parcel of land, it indicates that the soil has very poor drainage qualities. In such cases, the recommended procedure involves including a special soil study and site plan from a licensed engineer. This is essential because the poor drainage can significantly impact the design and functionality of the septic system. A specialized engineer can assess the site conditions, analyze soil characteristics, and propose alternatives to either improve the percolation rate or recommend appropriate septic system designs that comply with local regulations. This ensures that the system will function effectively, protecting public health and the environment.

Moreover, addressing the drainage issue through thorough analysis and planning can lead to a better long-term solution rather than simply adapting conventional methods or submitting waivers that may not adequately resolve the issue.