What should be included in a site evaluation for OSSF installation?

A site evaluation for the installation of On-Site Sewage Facilities (OSSF) requires an in-depth assessment of various environmental and geological factors to ensure proper functioning and compliance with regulations. Including soil and geologic conditions, lot size, topography, and slope provides a comprehensive understanding of how the land will interact with the sewage system.

Soil and geologic conditions are critical because they influence the absorption and treatment of effluent. Understanding these parameters helps determine if the soil can adequately filter contaminants and support the system's design. The lot size is significant for determining the appropriate size and type of the sewage system, as certain systems require specific spacing and surface area. Additionally, the topography and slope affect drainage patterns and potential for runoff, which are essential in preventing system failure or environmental contamination.

In contrast, focusing solely on soil type neglects other factors that could impact the efficacy and legality of the OSSF. Water quality testing, while vital for assessing the impact of the system on surrounding water sources, is not part of the initial site evaluation necessary for installation planning. Lastly, considering local ordinances is important for compliance with legal requirements, but they cannot replace the necessity for a thorough site evaluation involving multiple physical and geological assessments.