What comprises cover material in sewage systems?

Cover material in sewage systems is primarily composed of soil that is rich in mineral content and has limited organic materials. This type of soil is crucial for providing structural support and proper drainage to septic systems. The mineral-rich soil helps facilitate the filtration of effluent while minimizing the potential for clogging that can occur with higher organic content.

In the context of sewage systems, the balance of properties in the cover material is essential for effective treatment processes. Too much organic material can lead to anaerobic conditions, which could hinder the treatment of sewage. Additionally, systems that rely on organic materials may not effectively support the biological processes necessary for detoxifying waste. Thus, maintaining a composition rich in minerals while having only a limited amount of organics ensures the system can function properly and protects the surrounding environment.