What must be leak-proof according to the holding tank sewage system inspections?

The requirement for service access points and covers to be leak-proof is critical in holding tank sewage system inspections. This is because these components are the main access areas for maintenance and monitoring of the tank's condition. If they are not leak-proof, there is a risk of sewage leaks, which could lead to contamination of the surrounding environment and pose significant health risks. Ensuring that these access points are sealed properly prevents odors from escaping and minimizes the chances of groundwater contamination, which is vital for protecting public health and the local ecosystem.

The importance of the other aspects, such as the tank's construction materials, the landscaping around the tank, and the plumbing connections, is certainly significant. However, the direct role of the access points and covers in safeguarding against spills makes them specifically critical in inspections.