The City of Asheboro pretreatment program is an EPA federally mandated program under the Approval Authority of the State of North Carolina. The City of Asheboro is an approved Pretreatment Program which means Asheboro is the Control Authority and is solely responsible for all compliance and enforcement actions within all aspects of the pretreatment program. The City of Asheboro Pretreatment Program has 16 Significant Industrial User (SIU) permits, 4 Local permits, 2 Groundwater permits, 29 dental dischargers and over 180 food service establishments and carwashes regulated under the FOG program. The Pretreatment Program requirements can be found in “Part IV Special Conditions for Municipal Facilities” of the National Pollutant Discharge Elimination System (NPDES) Wastewater Discharge Permit.
The main objectives of the Pretreatment Program are:
- Prevent the introduction of pollutants into the Publicly Owned Treatment Works (POTW) which have the potential to interfere with the POTW operation and contaminate the biosolids.
- Prevent the introduction of pollutants into the POTW which have the potential to pass through the treatment system, inadequately treated, into the waters of the state or have the potential to otherwise be incompatible with the wastewater system.
- Ensure compliance with all NPDES permit conditions, biosolids use and disposal requirements and any other federal, state, or local law which the POTW is subjected
- Protect both personnel and the general public who have the potential to come in contact with sewage, biosolids or treated effluent throughout their daily routines.
- Sewer Use Ordinance (SUO) – Adequate legal authority to implement and enforce the Pretreatment Program must be maintained.
- Industrial Waste Survey (IWS) – A survey of all POTW users as required by 40 CFR 403.8(f)(2)(i-iii) and 15A NCAC 02H .0905 to identify all Industrial Users with the potential to impact the POTW and identify those who are classified as Significant Industrial Users as defined by 40 CFR 403.3(v) and 15A NCAC 2H .0903(b)(34).
- Monitoring Plan – Implement a state approved monitoring plan for the collection of POTW data to use in a Headworks Analysis for development of pretreatment specific local limits.
- Headworks Analysis (HWA) and Local Limits – Conduct a HWA once every five years as required by the State and maintain adequate local limits in accordance with 40 CFR 403.5(c) and 15A NCAC 02H .0909 in order to implement the prohibitions listed in 40 CFR 403.5(a) and (b) and 15A NCAC 02H .0909
- Industrial User Permits (IUP) and Allocation Table (AT) – IUPs will be issued in accordance with NCGS 143-215.1 and shall contain limitations, sampling protocols, reporting requirements, appropriate standard and special conditions, and compliance schedules necessary for the installation of treatment and control technologies to assure their wastewater discharge will meet all applicable pretreatment standards and requirements. A current AT shall be maintained and will summarize the results of the HWA and limits from all IUPs. Permitted IUP loadings shall not exceed the treatment capacity of the POTW as determined by the HWA.
- Authorization to Construct (ATC) – Industrial users must obtain an ATC from the POTW prior to any construction or modifications of any pretreatment facility in accordance with 15A NCAC 02H .0906(b)(7) and NCGS 143-215.1(a)(8).
- POTW Inspection and Monitoring of IUs – The POTW shall inspect, survey, and monitor activities as required under 15A NCAC 02H .0908(e) and 40 CFR 403.8(f)(2)(v) in order to determine compliance with applicable pretreatment standards.
- IU Self Monitoring and Reporting – The POTW is responsible for requiring all Industrial Users to comply with applicable monitoring and reporting requirements outline in the State approved pretreatment program, the Industry’s pretreatment permit, or in 15A NCAC 02H .0908.
- Enforcement Response Plan (ERP) – Enforce and obtain appropriate remedies for violations of all pretreatment standards promulgated pursuant to section 307(b) and (c) of the CWA, Prohibitive discharge standards set forth in 40 CFR 403.5 and 15A NCAC 02H .0909, specific local limits, and other pretreatment requirements. All actions shall be consistent with the ERP approved by the State.
- Pretreatment Annual Reports (PAR) – The POTW shall submit a report to the State in accordance with 15A NCAC 02H .0908.This report shall be due by March 1 of each year and summarizes the previous year’s pretreatment program actions, performance, monitoring, and changes.
- Public Notice – The POTW shall publish annually a list of all Industrial Users that were in Significant Noncompliance (SNC) as defined in the POTW state-approved Sewer Use Ordinance with applicable pretreatment standards and requirements. This list will be published in accordance with 15A NCAC 02H .0903(b)(34), .0908(B)(5) and .0905 and 40 CFR 403.8(f)(2)(vii).
- Record Keeping - POTW must maintain all Pretreatment Program records as required by 15A NCAC 02H .0908(f) for a minimum of three years.
- Pretreatment Program Resources – The POTW shall maintain adequate funding and qualified personnel to accomplish the objectives of its approved pretreatment program as required by 15A NCAC 02H .0906(b)(9) and (10) and .0905 and 40 CFR 403.8(f)(3), 403.9(b)(3).
- Modification to Pretreatment Programs – All modifications to the approved pretreatment program including local limits modifications, POTW monitoring of Significant Industrial Users (SIUs) and Monitoring Plan modifications shall be considered a permit modification and shall be governed by 40 CFR 403.18, 15 NCAC 02H .0114 and 15A NCAC 02H .0907.
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