Which of the following components must only be installed if approved by the department?

In the context of septic system installations, certain components can pose significant health and environmental risks if not installed properly or according to specific regulations. Pump chambers, septic tanks, and holding tanks all serve critical functions in the management of wastewater, and therefore, their installation must comply with local regulatory standards to ensure safety and effectiveness.

The requirement for approval by the department underscores the importance of having qualified oversight in the installation of these components. Each of these systems requires proper design, location, and construction practices to function effectively and prevent issues such as leaks, overflows, or contamination of groundwater.

Since each type of containment and treatment system—whether it be a pump chamber for macerating and moving effluent, a septic tank for primary treatment, or a holding tank for temporarily storing wastewater—has its own set of regulations and specifications, emphasizing the need for approval ensures that only systems meeting the necessary local health and safety standards are implemented. This approach protects public health and preserves the environment from potential hazards associated with improper wastewater management.