What is the max allowable slope for a Type A OSSF structure?

The maximum allowable slope for a Type A On-Site Sewage Facility (OSSF) structure is 53 degrees. This specification is guided by factors such as the stability of the system and the effective distribution of effluent. A slope that exceeds this angle could compromise the integrity of the system, leading to potential failures, inefficiencies, or even environmental contamination.

Engineering standards are established to ensure that such systems are safely integrated into the landscape while effectively treating sewage. While other angles may seem plausible, they do not align with the best practices recognized in the field. Slopes beyond 53 degrees pose significant risks, including erosion, instability, and difficulty in effective maintenance of the facility. Thus, adhering to a 53-degree maximum ensures safety, functionality, and appropriate management of onsite sewage disposal.