In what scenario should new plans for an OSSF be drawn?

New plans for an On-Site Sewage Facility (OSSF) should be drawn after any changes are made on site because such modifications can significantly affect the system's design and function. Changes could involve alterations to the layout, size, or configuration of the system, local soil conditions, or the type of wastewater produced. Accurate and updated plans are essential for ensuring compliance with regulations and maintaining the efficiency and effectiveness of the OSSF. This ensures that the system will operate as intended under the new conditions, safeguarding public health and the environment.

Other scenarios, like having approval from the contractor, focusing solely on major installations, or the need for a new septic tank, do not encompass the full range of changes that might warrant new plans. Site-specific adjustments, regardless of their scale, necessitate updated documentation to reflect any implications for the overall system design and functionality.