After achieving final stabilization of a site with 70% or greater coverage, how many days do you have to submit a Notice of Termination (NOT)?

Upon achieving final stabilization of a construction site, which is defined as having 70% or greater vegetative cover or equivalent measures, the appropriate timeframe to submit a Notice of Termination (NOT) is 14 days. This timeframe is important because it ensures that compliance with the regulatory requirements for stormwater discharge is maintained.

Submitting the NOT after recognition of final stabilization demonstrates that the site no longer requires coverage under the National Pollutant Discharge Elimination System (NPDES) permit. It is a key step in formally closing out the site’s stormwater responsibilities and ensures that the regulatory authorities are informed and can perform any necessary inspections if required.

Thus, understanding the significance of timely submission of the NOT helps in maintaining compliance and ensuring that environmental protections are observed in line with state and federal regulations.