Inspections and Monitoring
The General Pretreatment Regulations under the Clean Water Act establish the overall framework for implementing an approved pretreatment program. The Regulations outline the minimum requirements which a Publicly Owned Treatment Works (POTW) must perform to satisfy the obligation established in its own Pollutant Discharge Elimination System (TPDES/NPDES) permit administered by the Environmental Protection Agency (EPA) and the Texas Commission on Environmental Quality (TCEQ). The Dallas Water Utilities is required by Section 403.8(f)(1)(v) of the Pretreatment Regulations to inspect and sample industrial users (IUs), and has the legal authority to:
"Carry out all inspection, surveillance and monitoring procedures necessary to determine, independent of information supplied by Industrial Users, compliance or noncompliance with applicable Pretreatment Standards and requirements. Representatives of the POTW shall be authorized to enter any premises of any Industrial User in which a discharge source or treatment system is located or in which records are required to be kept ... to assure compliance with Pretreatment Standards."
The Pretreatment Program staff carry out these requirements and conduct facility inspections, surveillance, and monitoring of industrial wastewater sources discharging to the City's wastewater collection system and treatment plants. The monitoring and inspections are performed in order to independently verify compliance with all applicable pretreatment standards. Monitoring/sampling of industrial discharges is performed according to 40 CFR 136.3(e). Inspections are conducted at facilities that may have a potential to impact the wastewater collection system. The purpose and objective of the compliance monitoring program (including inspections and sampling) are to:
Inspection and Monitoring Frequencies
The operations and activities that occur at the industrial user will determine the frequency and type of inspections conducted at the facility. For example:
Inspection and monitoring may also be a part of an investigation initiated subsequent to reports of suspicious activity, illegal dumping, or service interruptions. If you have any questions about any suspicious discharge to the sanitary sewer, please contact the DWU Pretreatment Program.
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