When can construction for an OSSF system begin?

Construction for an On-Site Sewage Facility (OSSF) system can only begin after receiving Authorization to Construct (ATC). The ATC is an essential document that signifies regulatory approval and ensures that all guidelines and standards set by the local health authority have been met. This step is critical because it confirms that the design and planning of the OSSF system conform to safety, environmental, and operational standards necessary to protect public health and the environment.

Starting construction before receiving the ATC could lead to regulatory violations, environmental issues, or even costly rework if the constructed system does not meet the required criteria. Therefore, the correct procedure is to wait until the ATC is issued, which ensures that the construction process is compliant and efficient.

The other choices do not provide the necessary authorization for construction to proceed safely and legally. Submitting planning materials or facing a denial does not indicate permission to begin construction. Additionally, construction cannot commence at any time during the application process, as this would bypass the regulatory checks that are in place to ensure the OSSF system is designed appropriately.