Background Under the National Pollutant Discharge Elimination System permits issued to the City and County of San Francisco (City) to operate the Southeast and Oceanside Water Pollution Control Plants, the City is required to implement a Pretreatment Program. This Program is required to comply with the regulations incorporated in the Clean Water Act (33 United States Code [U.S.C] section 1251 et seq.) and the General Pretreatment Regulations (Title 40 of the Code of Federal Regulations [CFR] Part 403).