Categorical Industrial Users: Categories and Requirements

EPA Pretreatment Categories and Standards

Categorical industrial users (CIUs) in the following table must comply with the monitoring, reporting, and record-keeping requirements for each of the categories in Title 40, Code of Federal Regulations. Links will exit the TCEQ Website.

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Monitoring Requirements

Conduct self-monitoring of wastewater discharges for the pretreatment program using 40 CFR Part 136 approved methods and amendments. Collect data with sufficient care to produce evidence admissible in enforcement and judicial actions.

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Reporting Requirements

A facility that meets the criteria of a CIU is required to comply with all federal, state, and local pretreatment requirements. To demonstrate compliance, a CIU needs to submit reports, self-monitor wastewater discharge, and maintain records.

The following types of reports are required under 40 CFR 403.12

• baseline monitoring report (BMR) - must be submitted 90 days prior to discharge

• 90-day compliance report (to verify compliance with categorical pretreatment standards) - must be submitted 90 days after discharge begins

• periodic compliance report (at least once every six months)

Others may include:

• compliance schedules and reports

• notification of potential problems, including slug loading

• notification of process or pretreatment changes

• notification of hazardous waste discharges

• pollutant management plans

• certifications

• toxic organic management plans

Reporting Requirements for Categorical Industrial Users Discharging to Publicly Owned Treatment Works without an Approved Pretreatment Program (TCEQ publication RG-401/04)

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Record-Keeping Requirements

Your CIU must retain monitoring records and reports for at least three years, or longer if there is pending litigation. The records need to be available to federal, state, and local government agencies for review and copying. Periodically, the Control Authority may inspect your facility for compliance with pretreatment regulations, including record keeping.

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Where do I Submit the Reports?

Submit the required reports to the agency responsible for regulating the CIU’s wastewater discharges into the POTW.

• If the POTW has an approved pretreatment program, the CIU is required to submit reports to the local POTW.

• For information on whether or not the POTW has an approved program please refer to the list of POTWs with an Approved TPDES Pretreatment Program .

• Please contact the local POTW for more information and possible additional requirements.

• If the POTW does not have an approved pretreatment program, the CIU is required to report to the TCEQ Pretreatment Program.

• Through a local ordinance or some other control mechanism, a POTW may also require that the CIU sends a copy of each report to them.

Contact the Pretreatment program if you have questions.

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