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HomeMy WebLinkAboutNC0020346_Draft Permit_20220419ROY COOPER Governor ELIZABETH S. BISER Secretary RICHARD E. ROGERS, JR. Director Mayor Gwendolyn Vann Town of Magnolia PO Box 459 Magnolia, NC 28453-0459 NORTH CAROLINA Environmental Quality April 18, 2022 Subject: DRAFT NPDES PERMIT NC0020346 Magnolia WWTP Grade II Biological WPCS [15A NCAC 08G .0302] Duplin County Dear Mayor Vann: Enclosed with this letter is a copy of the draft permit for your facility. Please review the draft very carefully to ensure thorough understanding of the conditions and requirements it contains. Your permit is among several in the Cape Fear River Basin that the Division has targeted for expedited renewal. This draft contains the following changes from the existing permit: ➢ The language in section A.(3) has been updated to be consistent with the finalization of federal requirements for electronic reporting. The NPDES standard conditions (Parts II, III, and IV) that are a part of the permit are not included in this draft document (cover, map, and Part I). The conditions are the same as in your current permit. The latest version is available at https://bit.ly/2BZ4xxx and can be viewed online or downloaded as a PDF file. With this notification, the Division will solicit public comment on this draft permit by publishing a notice in newspapers having circulation in the general Duplin County area, per EPA requirements. Please provide your comments, if any, to me no later than 30 days after receiving this draft permit. Following the 30-day public comment period, the Division will review all pertinent comments and take appropriate action prior to issuing a final permit. If you have questions concerning the draft, please contact me via email at [emily.richards@ncdenr.gov] or call 919-707-9125. ec: NPDES files Wilmington Regional Office 1:tE NORTH CAROLINA Department of Environmental Duali� Sincerely, Emily Richards Environmental Specialist II NPDES Program North Carolina Department of Environmental Quality I Division of Water Resources 512 North Salisbury Street 11611 Mail Service Center I Raleigh, North Carolina 27699-1611 919.707.9000 Permit NC0020346 STATE OF NORTH CAROLINA DEPARTMENT OF ENVIRONMENTAL QUALITY DIVISION OF WATER RESOURCES PERMIT TO DISCHARGE WASTEWATER UNDER THE NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM In compliance with the provisions of North Carolina General Statute 143-215.1, other lawful standards and regulations promulgated and adopted by the North Carolina Environmental Management Commission, and the Federal Water Pollution Control Act, as amended, the Town of Magnolia is hereby authorized to discharge wastewater from a facility located at the Magnolia WWTP 240 Treatment Street Magnolia Duplin County to receiving waters designated as Stewarts Creek in subbasin 03-06-19 of the Cape Fear River Basin in accordance with effluent limitations, monitoring requirements, and other conditions set forth in Parts I, II, III and IV hereof. This permit shall become effective .... This permit and authorization to discharge shall expire at midnight on January 31, 2027. Signed this day ..... Richard E. Rogers, Jr., Director Division of Water Resources By Authority of the Environmental Management Commission Page 1 of 6 Permit NC0020346 SUPPLEMENT TO PERMIT COVER SHEET All previous NPDES Permits issued to this facility, whether for operation or discharge are hereby revoked, and as of this issuance, any previously issued permit bearing this number is no longer effective. Therefore, the exclusive authority to operate and discharge from this facility arises under the permit conditions, requirements, terms, and provisions included herein. The Town of Magnolia is hereby authorized to: 1. Continue to operate an existing 0.250 MGD wastewater treatment system that includes the following components: • Influent mechanical screen • Influent flow meter with composite sampler • Influent pump station with three 220-gpm pumps, backup generator, telemetry • Dual extended air activated sludge treatment reactors with: • Dual 22,900-gallon pre -reaction chambers • Dual 100,700-gallon aeration basins with fine bubble diffusers with dual 397 scfm, 20-hp blowers • Dual 20-foot diameter center feed secondary clarifiers • RAS/WAS pump station with dual 350-gpm pumps • Dual microscreen drum filters • UV disinfection (2 channel banks in series) • Post -aeration with diffusers • Effluent pump station with three 220-gpm 10-hp vertical turbine pumps and 32,000-foot 8-inch effluent force main • Effluent flow meter with composite sampler • 500-gpm sludge loading station transfer with 8 hp pump • 89,900-gallon sludge digester with fine air diffusers with 224 scfm 15-hp blowers • 200 kW emergency generator with automatic transfer switch and instrumentation The facility is located at the Magnolia WWTP (240 Treatment Street) in Magnolia, Duplin County. 2. Discharge from said treatment works via Outfall 001, at the location specified on the attached map into Stewarts Creek [Stream Index: 18-68-2-10] currently classified C-Swamp waters in subbasin 03-06-19 [HUC: 030300605] of the Cape Fear River Basin. Page 2 of 6 Permit NC0020346 Part I A. (1) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS [15A NCAC 02B.0400 et seq., 15A NCAC 02B.0500 et seq.] Beginning with the effective date of this permit and lasting until expiration, the Permittee is authorized to discharge treated wastewater from Outfall 001. Such discharges shall be limited and monitored' by the Permittee as specified below: PARAMETER Parameter Code EFFLUENT LIMITATIONS MONITORING REQUIREMENTS Monthly Average Weekly Average Measurement Frequency Sample Type Sample Location 2 Flow 50050 0.250 MGD Continuous Recording Influent or Effluent BOD, 5-day, (20°C) — Summer* 3 C0310 5.0 mg/L 10.0 mg/L Weekly Composite Influent and Effluent BOD, 5-day, (20°C) — Winter* 3 C0310 10.0 mg/L 20.0 mg/L Weekly Composite Influent and Effluent Total Suspended Solids3 C0530 30.0 mg/L 45.0 mg/L Weekly Composite Influent and Effluent NH3 as N — Summer* C0610 2.0 mg/L 6.0 mg/L Weekly Composite Effluent NH3 as N — Winter* C0610 4.0 mg/L 12.0 mg/L Weekly Composite Effluent Dissolved Oxygen 00300 Weekly average > 6.0 mg/L Weekly Grab Effluent Fecal Coliform (geometric mean) 31616 200/100 ml 400/100 ml Weekly Grab Effluent Total Residual Chlorine 3 50060 Daily Maximum 17 pg/L 2/Week Grab Effluent Temperature (°C) 00010 Monitor & Report Daily Grab Effluent Total Nitrogen (NO2+NO3+TKN) C0600 Monitor & Report Quarterly Composite Effluent Total Phosphorus C0665 Monitor & Report Quarterly Composite Effluent pH 00400 > 6.0 and < 9.0 standard units Weekly Grab Effluent Dissolved Oxygen 00300 Monitor & Report Weekly Grab Upstream and Downstream Fecal Coliform (geometric mean) 31616 Monitor & Report Weekly Grab Upstream and Downstream Conductivity 00094 Monitor & Report Weekly Grab Upstream and Downstream Temperature (°C) 00010 Monitor & Report Weekly Grab Upstream and Downstream *Summer: Footnotes: 1. The permittee shall submit discharge monitoring reports electronically using the Division's eDMR system [see A. (3)]. 2. Upstream = 25 feet from the outfall; Downstream = at least 600 feet downstream from the outfall. 3. The monthly average BOD5 and TSS concentrations shall not exceed 15% of the respective influent value (85% removal). April 1 — October 31; Winter: November 1 — March 31 See A. (2) for instructions should the facility's permitted UV system fail and an alternate means of disinfection is required. Total Residual Chlorine monitoring requirements and limits are applicable only if chlorine compounds are used for disinfection. THERE SHALL BE NO DISCHARGE OF FLOATING SOLIDS OR VISIBLE FOAM IN OTHER THAN TRACE AMOUNTS. Page 3 of 6 Permit NC0020346 A. (2) TEMPORARY MEANS OF DISINFECTION [15A NCAC 02B.0400 et seq., 15A NCAC 02B.0500 et seq.] In the event that the wastewater treatment plant's ultraviolet (UV) disinfection system should fail, underperform, or otherwise be removed from effective service, the permittee or his agent should immediately inform the Wilmington Regional Office of this development and discuss temporary, alternate means for disinfection of the effluent. If chlorine compounds are used as temporary means of disinfection, the total residual chlorine (TRC) concentration of the effluent must be monitored on a daily basis while this method of disinfection is in use and values must be reported on the discharge monitoring report. TRC in the effluent may not exceed 17 µg/L; therefore, dechlorination methods may also be necessary to ensure protection of water quality in the receiving stream. In the event that TRC monitoring should occur, the Division shall consider all effluent TRC values reported below 50 µg/L to be in compliance with the permit. However, the Permittee shall continue to record and submit all values reported by a North Carolina certified laboratory (including field certified), even if these values fall below 50 µg/L. Use of a disinfection system other than the permitted UV system during circumstances not deemed as emergency and/or temporary (replacement of lamps, lamp cleaning or maintenance, etc.) will be considered a violation of the terms of this permit. A. (3) ELECTRONIC REPORTING OF MONITORING REPORTS [NCGS 143-215.1 (b)] Federal regulations require electronic submittal of all discharge monitoring reports (DMRs) and program reports. The final NPDES Electronic Reporting Rule was adopted and became effective on December 21, 2015. NOTE: This special condition supplements or supersedes the following sections within Part II of this permit (Standard Conditions for NPDES Permits): • Section B. (11.) Signatory Requirements • Section D. (2.) Reporting • Section D. (6.) Records Retention • Section E. (5.) Monitoring Reports 1. Reporting Requirements [Supersedes Section D. (2.) and Section E. (5.) (a)1 The permittee shall report discharge monitoring data electronically using the NC DWR's Electronic Discharge Monitoring Report (eDMR) internet application. Monitoring results obtained during the previous month(s) shall be summarized for each month and submitted electronically using eDMR. The eDMR system allows permitted facilities to enter monitoring data and submit DMRs electronically using the internet. The eDMR system may be accessed at: https ://deq.nc. gov/about/divisions/water-resources/edmr. Page 4 of 6 Permit NC0020346 If a permittee is unable to use the eDMR system due to a demonstrated hardship or due to the facility being physically located in an area where less than 10 percent of the households have broadband access, then a temporary waiver from the NPDES electronic reporting requirements may be granted and discharge monitoring data may be submitted on paper DMR forms (MR 1, 1.1, 2, 3) or alternative forms approved by the Director. Duplicate signed copies shall be submitted to the following address: NC DEQ / Division of Water Resources / Water Quality Permitting Section ATTENTION: Central Files 1617 Mail Service Center Raleigh, North Carolina 27699-1617 See "How to Request a Waiver from Electronic Reporting" section below. Regardless of the submission method, the first DMR is due on the last day of the month following the issuance of the permit or in the case of a new facility, on the last day of the month following the commencement of discharge. Starting on December 21, 2025, the permittee must electronically report the following compliance monitoring data and reports, when applicable: • Sewer Overflow/Bypass Event Reports; • Pretreatment Program Annual Reports; and • Clean Water Act (CWA) Section 316(b) Annual Reports. The permittee may seek an electronic reporting waiver from the Division (see "How to Request a Waiver from Electronic Reporting" section below). 2. Electronic Submissions In accordance with 40 CFR 122.41(1)(9), the permittee must identify the initial recipient at the time of each electronic submission. The permittee should use the EPA's website resources to identify the initial recipient for the electronic submission. Initial recipient of electronic NPDES information from NPDES-regulated facilities means the entity (EPA or the state authorized by EPA to implement the NPDES program) that is the designated entity for receiving electronic NPDES data [see 40 CFR 127.2(b)]. EPA plans to establish a website that will also link to the appropriate electronic reporting tool for each type of electronic submission and for each state. Instructions on how to access and use the appropriate electronic reporting tool will be available as well. Information on EPA's NPDES Electronic Reporting Rule is found at: https://www.federalregister.gov/documents/2015/10/22/2015-24954/national-pollutant- discharge-elimination-system-npdes-electronic-reporting-rule Electronic submissions must start by the dates listed in the "Reporting Requirements" section above. 3. How to Request a Waiver from Electronic Reporting The permittee may seek a temporary electronic reporting waiver from the Division. To obtain an electronic reporting waiver, a permittee must first submit an electronic reporting waiver request to the Division. Requests for temporary electronic reporting waivers must be submitted in writing to the Division for written approval at least sixty (60) days prior to the date the facility would be required under this permit to begin submitting monitoring data and reports. The duration of a temporary waiver Page 5 of 6 Permit NC0020346 shall not exceed 5 years and shall thereupon expire. At such time, monitoring data and reports shall be submitted electronically to the Division unless the permittee re -applies for and is granted a new temporary electronic reporting waiver by the Division. Approved electronic reporting waivers are not transferrable. Only permittees with an approved reporting waiver request may submit monitoring data and reports on paper to the Division for the period that the approved reporting waiver request is effective. Information on eDMR and the application for a temporary electronic reporting waiver are found on the following web page: http://deq.nc.gov/about/divisions/water-resources/edmr 4. Signatory Requirements [Supplements Section B. (11.) (b) and Supersedes Section B. (11.) (d)1 All eDMRs submitted to the permit issuing authority shall be signed by a person described in Part II, Section B. (11.)(a) or by a duly authorized representative of that person as described in Part II, Section B. (11.)(b). A person, and not a position, must be delegated signatory authority for eDMR reporting purposes. For eDMR submissions, the person signing and submitting the DMR must obtain an eDMR user account and login credentials to access the eDMR system. For more information on North Carolina's eDMR system, registering for eDMR and obtaining an eDMR user account, please visit the following web page: http ://deq.nc . gov/about/divisions/water-resources/edmr Certification. Any person submitting an electronic DMR using the state's eDMR system shall make the following certification [40 CFR 122.22]. NO OTHER STATEMENTS OF CERTIFICATION WILL BE ACCEPTED: "I certify, under penalty of law, that this document and all attachments were prepared under my direction or supervision in accordance with a system designed to assure that qualified personnel properly gather and evaluate the information submitted. Based on my inquiry of the person or persons who manage the system, or those persons directly responsible for gathering the information, the information submitted is, to the best of my knowledge and belief true, accurate, and complete. I am aware that there are significant penalties for submitting false information, including the possibility of fines and imprisonment for knowing violations." 5. Records Retention [Supplements Section D. (6.)1 The permittee shall retain records of all Discharge Monitoring Reports, including eDMR submissions. These records or copies shall be maintained for a period of at least 3 years from the date of the report. This period may be extended by request of the Director at any time [40 CFR 122.41]. Page 6 of 6 Town of Magnolia Magnolia WWTP NPDES Permit 20346