A Notice to Comply is served to a permittee under which condition?

A Notice to Comply is served to a permittee primarily when there is a failure to adhere to the specific conditions outlined in their permit. Permits are issued with a set of requirements that must be met to ensure compliance with regulations and to protect public health and the environment. When a permittee does not fulfill these obligations, it indicates a deficiency in their compliance, thereby prompting the issuance of a Notice to Comply.

This notice serves as a formal alert that the permittee must rectify the identified issues or violations within a specified timeframe to avoid further enforcement actions. The goal of the Notice to Comply is to bring the permittee back into conformity with the permit's terms and ultimately improve overall regulatory compliance.

In this context, the other options do not align with the purpose of a Notice to Comply. A voluntary permit application does not involve compliance issues, while extending the permit duration or using the notice solely for educational purposes do not warrant the issuance of such a notice. Thus, the correct and relevant condition for serving a Notice to Comply is indeed linked to a failure to comply with the permit conditions.