Technically Based Local Limits (TBLL) are developed by the control authority.

• A. EPA
• B. Local Government
• C. Control Authority
• D. Utilities Board

Answer: (C)

TBLL are set by the control authority—the entity that administers and enforces the local pretreatment program for the wastewater treatment works. This authority uses the plant’s actual treatment capabilities, operating conditions, and the sewer network’s characteristics to determine pollutant limits that prevent interference or pass-through and to protect downstream waters. While federal standards provide the overarching framework, the specific technically based local limits are developed and applied locally by the control authority to fit that POTW’s situation. Local governments or utilities may own or operate the plant, but the formal responsibility for creating TBLL lies with the control authority.