What is a critical consideration during the site assessment for an OSSF installation?

During the site assessment for an On-Site Sewage Facility (OSSF) installation, a critical consideration is the environmental conditions, which include factors like moisture and dust. These aspects are vital because they directly influence the performance of the sewage system and its ability to treat wastewater effectively.

Moisture levels in the soil affect the percolation rate, which is crucial for determining how well the system can absorb and treat effluent. If the soil is too wet, it can lead to system failure or groundwater contamination. Additionally, understanding the presence of dust can indicate soil types and stability, which also impact installation and maintenance.

Assessing these environmental conditions allows the installer to make informed decisions about system design, ensuring the OSSF will function optimally and adhere to regulations. In contrast, while factors such as cost, size of the property, and weather conditions are important, they do not address the immediate environmental implications that directly affect the installation and efficacy of the sewage system.