What is the required advance notice period for New Categorical Dischargers to submit a Baseline Monitoring Report?

The advance notice period for new categorical dischargers to submit a Baseline Monitoring Report is indeed 90 days. This time frame is stipulated to ensure that facilities have adequate time to monitor their effluent and gather necessary data that accurately reflects their potential discharge. The requirement for a 90-day advance notice is designed to facilitate compliance with regulations and allows time for any necessary adjustments in processes or treatment methods. This process ensures that the dischargers can properly evaluate their discharge, implement any needed changes, and prepare an effective monitoring report in accordance with regulatory standards.