According to the guidance for inspectors, which systems are to be inspected?

The guidance for inspectors emphasizes the importance of evaluating systems that are readily openable and accessible. This focus ensures that inspectors can conduct comprehensive assessments of the septic systems. When systems are accessible, inspectors can examine the components effectively, identifying any potential problems or areas in need of repair.

Accessibility allows for a thorough visual inspection, which is critical to ensuring that all elements of the system are functioning as intended and meet safety and regulatory standards. Systems that are not readily accessible may prevent inspectors from performing a complete evaluation, which could lead to undetected issues that could pose risks to the environment or public health.

The other choices involve criteria that may not provide the same level of assurance about the system's overall condition. For example, inspections based on warranty status or the historical conditions of a system may not focus on current accessibility and functionality, which are key to effective inspection practices.