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HomeMy WebLinkAboutNC0023973_Draft Permit_20220110DocuSign Envelope ID: 82350931-7E08-43F3-B31A-0250B4908196 ROY COOPER Governor ELIZABETH S. BISER Secretary S. DANIEL SMITH Director Mr. Kenneth Waldroup Executive Director Cape Fear Public Utility Authority 235 Government Center Drive Wilmington, North Carolina 28403 Dear Mr. Waldroup: NORTH CAROLINA Environmental Quality January 10, 2022 Subject: Draft NPDES Permit Modification Permit NC0023973 M'Kean Maffit (Southside) WWTP New Hanover County Grade IV Biological WPCS SIC Code 4952 Enclosed with this letter is a copy of the Draft NPDES permit modification for your facility. Please review this draft carefully to ensure thorough understanding of the requirements and conditions it contains. Please note that the receiving stream is listed as an impaired waterbody on the North Carolina 2020 303(d) Impaired Waters List for copper and low dissolved oxygen. Addressing impaired waters is a high priority with the Division, and instream data will continue to be evaluated. If there is noncompliance with permitted effluent limits and stream impairment can be attributed to your facility, then mitigative measures may be required The draft permit contains the following significant changes from your current permit: • Per the Permittee's request, the final date of the compliance schedule for Total Copper has been extended to November 29, 2022, with relevant footnotes in the affected effluent sheets modified to reflect this extended date. See Footnote 6 in Sections A. (1.) through A. (4.) and Special Condition A. (9.). • Some of the wording has changed in Special Condition A. (5.), Chronic Toxicity Permit Limit, please review each paragraph carefully. • Federal regulations require electronic submittal of all discharge monitoring reports (DMRs) and program reports. The requirement to continue reporting discharge monitoring data electronically using the NC DWR's Electronic Discharge Monitoring Report (eDMR) internet application has been added to your NPDES permit [See Special Condition A. (12.)]. • A notation was made concerning the Electronic Reporting Rule — NPDES Electronic Reporting Rule — Phase 2 Extension. EPA extended the Phase 2 deadline to December 21, 2025. =D.E NORTH CAROLINA Department of Environmental Duality North Carolina Department of Environmental Quality I Division of Water Resources 512 North Salisbury Street 11617 Mail Service Center I Raleigh, North Carolina 27699-1617 919.707.9000 DocuSign Envelope ID: 82350931-7E08-43F3-B31A-0250B4908196 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 except that agency and division names have been updated. The latest version is available at https://bit.ly/3k5NFaL and can be viewed online or downloaded as a PDF file. Concurrent with this notification the Division is publishing a notice in a newspaper having circulation in the general New Hanover County area, soliciting public comments on this draft permit. Please provide any written comments you may have to the following: NCDEQ/DWR, NPDES Permitting Branch, 1617 Mail Service Center, Raleigh, NC 27699-1617 no later than 30 days after receipt of 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 this draft permit, please call me at (919) 707-3611 or by email at gary.perlmutter@ncdenr.gov. Sincerely, DocuSigned by: L Gary Perlmutter, Environmental Specialist II NPDES Municipal Permitting Unit Hardcopy: NPDES Files eCopy: US EPA Region 4 DWR / Wilmington Regional Office / Water Quality / Morella S. King DWR / Operator Certification Program / Maureen Kinney DWR / Ecosystems Branch/Mark Vander Borgh DWR / Aquatic Toxicology Branch / Zach Thomas and Cindy Moore DWR / Municipal Permitting Unit / Keyes McGee DWR / Wilmington Regional Office/Water Quality / Pretreatment/Tom Harrington and Helen Perez CFPUA / Beth Eckert Page 2 of 2 DocuSign Envelope ID: 82350931-7E08-43F3-B31A-0250B4908196 Permit NC0023973 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 provision 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 Cape Fear Public Utility Authority is hereby authorized to discharge wastewater from a facility located at the M'Kean Maffitt (Southside) WWTP 3436 River Road Wilmington, NC 28412 New Hanover County to receiving waters designated as Cape Fear River in 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 Month xx, 2022. This permit and authorization to discharge shall expire at midnight on November 30, 2022. Signed this day Month xx, 2022. DRAFT S. Daniel Smith, Director Division of Water Resources By Authority of the Environmental Management Commission DocuSign Envelope ID: 82350931-7E08-43F3-B31A-0250B4908196 Permit NC0023973 SUPPLEMENT TO PERMIT COVER SHEET All previous NPDES Permits issued to this facility, whether for operation or discharge, are hereby revoked. As of this permit 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 Cape Fear Public Authority is hereby authorized to: 1. Continue to operate an existing 12.0 MGD wastewater treatment system consisting of the following: • Influent metering • Standby manual bar screen • Dual mechanical bar screens, each with grit removal and storage unit • Splitter box • Dual primary clarifiers • Dual trickling filters (180 feet diameter) • Short-term aeration basin • Splitter box • Three screw lift pumps • Dual secondary clarifiers • Return activated sludge pumping station • Chlorine gas disinfection facilities • Liquid dechlorination facilities • Flash mixer for chlorine gas • Dual chlorine contact chambers • Outfall structure with flow meter • Main plant backup generator • Lift -station generator, automatically activated (with backup generator) • Primary and waste -activated sludge pump stations • Two gravity -belt thickeners, two belt filter presses; four anaerobic digesters; alkaline stabilization, covered storage area • Solids land application The facility is located at the M'Kean Maffitt (Southside) WWTP, 3436 River Road, Wilmington in New Hanover County. 2. After receiving an Authorization to Construct from the Division, construct and operate facilities giving the system a treatment capacity of 16.0 MGD; and 3. After receiving an Authorization to Construct from the Division, construct and operate facilities giving the system a treatment capacity of 20.0 MGD; and 4. After receiving an Authorization to Construct from the Division, construct and operate facilities giving the system an ultimate treatment capacity of 24.0 MGD; and 5. Discharge from said treatment facility through Outfall 001 at the location specified on the attached map into the Cape Fear River, classified as a Class SC-PNA stream in the Cape Fear River Basin. Page 2 of 21 DocuSign Envelope ID: 82350931-7E08-43F3-B31A-0250B4908196 Permit NC0023973 PART I A. (1.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS (12.0 MGD) [15A NCAC 02B .0400 et seq., 02B .0500 et seq.] a. During the period beginning on the effective date and lasting until expansion above 12.0 MGD (and receipt of the Engineer's Certification of completion) or permit 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: EFFLUENT CHARACTERISTICS LIMITS MONITORING REQUIREMENTS Monthly Average Weekly Average Daily Maximum Measurement Frequency Sample Type Sample Location 2 Flow 12.0 MGD Continuous Recording Influent or Effluent CBOD, 5-day, 20°C 3 25.0 mg/L 40.0 mg/L 2/Week Composite Influent and Effluent Total Suspended Solids (TSS) 3 30.0 mg/L 45.0 mg/L 2/Week Composite Influent and Effluent Ammonia—N (NH3-N) (mg/L) Monitor and Report 3/Week Composite Effluent Enterococci (geometric mean) 35/100 mL 276/100 mL 2/Week Grab Effluent Total Residual Chlorine (TRC) 4 13.0 µg/L Daily Grab Effluent Temperature (°C) Monitor and Report Daily Grab Effluent pH Between 6.8 and 8.5 Standard Units 3/Week Grab Effluent Dissolved Oxygen (DO) (mg/L) Monitor and Report Daily Grab Effluent Total Nitrogen (mg/L) 5 Monitor and Report Monthly Composite Effluent Total Phosphorus (mg/L) Monitor and Report Monthly Composite Effluent Total Copper 6 3.7 pg/L 5.8 pg/L Monthly Composite Effluent Total Silver (µg/L) 7 Monitor and Report Quarterly Composite Effluent Chronic Toxicity 8 Ceriodaphnia dubia Pass/Fail at 3% effluent Quarterly Composite Effluent Effluent Pollutant Scan Monitor and Report Footnote 9 Footnote 9 Effluent Dissolved Oxygen (DO) (mg/L)1° Variable 11 Grab Upstream, Downstream Temperature (°C)10 Variable 11 Grab Upstream, Downstream All footnotes are listed on the following page. Page 3 of 21 DocuSign Envelope ID: 82350931-7E08-43F3-B31A-0250B4908196 Permit NC0023973 Footnotes: 1. Submit discharge monitoring reports electronically using NC DWR's eDMR application system; see Section A. (12.). 2. Upstream is at a point equidistant between the radio tower north of the WWTP and the northern end of the dredge spoil island immediately east of the outfall. Downstream is at a point equidistant between the mouth of Barnards Creek and the southern end of the dredge spoil island immediately east of the outfall. 3. The monthly average effluent CBOD5 and TSS concentrations shall not exceed 15% of the respective influent value (85% removal). 4. 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. 5. Total Nitrogen = TKN + NO3-N + NO2-N, where TKN is Total Kjeldahl Nitrogen, NO3-N is Nitrate Nitrogen, and NO2-N is Nitrite Nitrogen. 6. The facility shall follow the compliance schedule detailed in Section A. (9.). The Permittee shall achieve compliance with these limitations by November 29, 2022. 7. Total Silver shall be monitored using "clean" sampling techniques and reported to the lower reporting level of the procedure. 8. Whole Effluent Toxicity shall be monitored using the Pass/Fail Chronic Toxicity test with Ceriodaphnia dubia at 3% effluent. Samples shall be taken in March, June, September & December; see Section A. (5.). 9. The Permittee shall perform three Effluent Pollutant Scans during the term of this permit; see Section A. (6.). 10. The Permittee has deferred receiving -stream sampling to the Lower Cape Fear River Program by memorandum of agreement (MOA). Should this MOA terminate for any reason, the Permittee shall immediately inform the Division in writing and immediately resume instream monitoring in accordance with this permit. 11. Stream samples shall be collected 3/week from June 1 through September 30, and collected weekly from October 1 through May 31. b. There shall be no discharge of floating solids or visible foam in other than trace amounts. Page 4 of 21 DocuSign Envelope ID: 82350931-7E08-43F3-B31A-0250B4908196 Permit NC0023973 A. (2.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS (16.0 MGD) [15A NCAC 02B .0400 et seq., 02B .0500 et seq.] a. Beginning upon receipt of the Engineer's Certification of completion of the 16.0 MGD expansion and lasting until expansion above 16.0 MGD (and receipt of the Engineer's Certification of completion) or permit 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: EFFLUENT CHARACTERISTICS LIMITS MONITORING REQUIREMENTS Monthly Average Weekly Average Daily Maximum Measurement Frequency Sample Type Sample Location 2 Flow 16.0 MGD Continuous Recording Influent or Effluent BOD, 5-day, 20°C (Summer: April 1 through October 31) 3 5.0 mg/L g 7.5 mg/L g DailyComposite p Influent and Effluent BOD, 5-day, 20°C (Winter: 3 November 1 through March 31) 10.0 mg/L 15.0 mg/L Daily Composite Influent and Effluent Total Suspended Solids (TSS) 3 10.0 mg/L 15.0 mg/L Daily Composite Influent and Effluent NH3—N (Summer: April 1 through October 31) 1.0 mg/L 3.0 mg/L 3/Week Composite Effluent NH3—N (Winter: November 1 through March 31) 2.0 mg/L 6.0 mg/L 3/Week Composite Effluent Enterococci (geometric mean) 35/100 mL 276/100 mL Daily Grab Effluent Total Residual Chlorine (TRC) 4 13.0 µg/L Daily Grab Effluent Temperature (°C) Monitor and Report Daily Grab Effluent pH Between 6.8 and 8.5 Standard Units Daily Grab Effluent Dissolved Oxygen (DO) Daily average >_ 6.0 mg/L Daily Grab Effluent Total Nitrogen (mg/L) 5 Monitor and Report Monthly Composite Effluent Total Phosphorus (mg/L) Monitor and Report Monthly Composite Effluent Total Phenolic Compounds (pg/L) Monitor and Report Quarterly Composite Effluent Total Copper (pg/L) 6 1.8 pg/L 2.9 pg/L Monthly Composite Effluent Total Silver (µg/L) 7 Monitor and Report Quarterly Composite Effluent Chronic Toxicity 8 Ceriodaphnia dubia Pass/Fail at 4% effluent Quarterly Composite Effluent Effluent Pollutant Scan Monitor and Report Footnote 9 Footnote 9 Effluent Dissolved Oxygen (DO) (mg/L) 10 Variable 11 Grab Upstream, Downstream Temperature (°C) 10 Variable 11 Grab Upstream, Downstream All footnotes are listed on the following page. Page 5 of 21 DocuSign Envelope ID: 82350931-7E08-43F3-B31A-0250B4908196 Permit NC0023973 Footnotes: 1. Submit discharge monitoring reports electronically using NC DWR's eDMR application system; see Section A. (12.). 2. Upstream is at a point equidistant between the radio tower north of the WWTP and the northern end of the dredge spoil island immediately east of the outfall. Downstream is at a point equidistant between the mouth of Barnards Creek and the southern end of the dredge spoil island immediately east of the outfall. 3. The monthly average effluent BOD5 and TSS concentrations shall not exceed 15% of the respective influent value (85% removal). 4. Limit and monitor only if the facility adds chlorine or chlorine derivatives to wastewater that is eventually discharged. The Division shall consider all effluent TRC values reported below 50 µg/L to be in compliance with the permit. 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. 5. Total Nitrogen = TKN + NO3-N + NO2-N, where TKN is Total Kjeldahl Nitrogen, NO3-N is Nitrate Nitrogen, and NO2-N is Nitrite Nitrogen. 6. The facility shall follow the compliance schedule detailed in Section A. (9.). The Permittee shall achieve compliance with these limitations by November 29, 2022. 7. Total Silver shall be monitored using "clean" sampling techniques and reported to the lower reporting level of the procedure. 8. Whole Effluent Toxicity shall be monitored using the Pass/Fail Chronic Toxicity test with Ceriodaphnia dubia at 4% effluent. Samples shall be taken in March, June, September and December; see Section A. (5.). 9. The Permittee shall perform three Effluent Pollutant Scans during the term of this permit; see Section A. (6.). 10. The Permittee has deferred receiving -stream sampling to the Lower Cape Fear River Program by memorandum of agreement (MOA). Should this MOA terminate for any reason, the Permittee shall immediately inform the Division in writing and immediately resume instream monitoring in accordance with this permit. 11. Stream samples shall be collected 3/week from June 1 through September 30, and collected weekly from October 1 through May 31. b. There shall be no discharge of floating solids or visible foam in other than trace amounts. Page 6 of 21 DocuSign Envelope ID: 82350931-7E08-43F3-B31A-0250B4908196 Permit NC0023973 A. (3.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS (20.0 MGD) [15A NCAC 02B .0400 et seq., 02B .0500 et seq.] a. Beginning upon receipt of the Engineer's Certification of completion of the 20.0 MGD expansion and lasting until expansion above 20.0 MGD (and receipt of the Engineer's Certification of completion) or permit 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: EFFLUENT CHARACTERISTICS LIMITS MONITORING REQUIREMENTS Monthly Average Weekly Average Daily Maximum Measurement Frequency Sample Type Sample Location 2 Flow 20.0 MGD Continuous Recording Influent or Effluent BOD, 5-day, 20°C (Summer: April 1 through October 31) 3 5.0 mg/L g 7.5 mg/L g DailyComposite p Influent and Effluent BOD, 5-day, 20°C (Winter: 3 November 1 through March 31) 10.0 mg/L 15.0 mg/L Daily Composite Influent and Effluent Total Suspended Solids (TSS) 3 10.0 mg/L 15.0 mg/L Daily Composite Influent and Effluent NH3—N (Summer: April 1 through October 31) 1.0 mg/L 3.0 mg/L 3/Week Composite Effluent NH3—N (Winter: November 1 through March 31) 2.0 mg/L 6.0 mg/L 3/Week Composite Effluent Enterococci (geometric mean) 35/100 mL 276/100 mL Daily Grab Effluent Total Residual Chlorine (TRC) 4 13.0 µg/L Daily Grab Effluent Temperature (°C) Monitor and Report Daily Grab Effluent pH Between 6.8 and 8.5 Standard Units Daily Grab Effluent Dissolved Oxygen (DO) Daily average >_ 6.0 mg/L Daily Grab Effluent Total Nitrogen (mg/L) 5 Monitor and Report Monthly Composite Effluent Total Phosphorus (mg/L) Monitor and Report Monthly Composite Effluent Total Phenolic Compounds (pg/L) Monitor and Report Quarterly Composite Effluent Total Copper (pg/L) 6 1.8 pg/L 2.9 pg/L Monthly Composite Effluent Total Silver (µg/L) 7 Monitor and Report Quarterly Composite Effluent Chronic Toxicity 8 Ceriodaphnia dubia Pass/Fail at 5% effluent Quarterly Composite Effluent Effluent Pollutant Scan Monitor and Report Footnote 9 Footnote 9 Effluent Dissolved Oxygen (DO) (mg/L) 10 Variable 1, Grab Upstream, Downstream Temperature (°C)10 Variable 1, Grab Upstream, Downstream All footnotes are listed on the following page. Page 7 of 21 DocuSign Envelope ID: 82350931-7E08-43F3-B31A-0250B4908196 Permit NC0023973 Footnotes: 1. Submit discharge monitoring reports electronically using NC DWR's eDMR application system; see Section A. (12.). 2. Upstream is at a point equidistant between the radio tower north of the WWTP and the northern end of the dredge spoil island immediately east of the outfall. Downstream is at a point equidistant between the mouth of Barnards Creek and the southern end of the dredge spoil island immediately east of the outfall. 3. The monthly average effluent BOD5 and TSS concentrations shall not exceed 15% of the respective influent value (85% removal). 4. Limit and monitor only if the facility adds chlorine or chlorine derivatives to wastewater that is eventually discharged. 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. 5. Total Nitrogen = TKN + NO3-N + NO2-N, where TKN is Total Kjeldahl Nitrogen, NO3-N is Nitrate Nitrogen, and NO2-N is Nitrite Nitrogen. 6. The facility shall follow the compliance schedule detailed in Section A. (9.). The Permittee shall achieve compliance with these limitations by November 29, 2022. 7. Total Silver shall be monitored using "clean" sampling techniques and reported to the lower reporting level of the procedure. 8. Whole Effluent Toxicity will be monitored using the Pass/Fail Chronic Toxicity test with Ceriodaphnia dubia at 5% effluent. Samples shall be taken in March, June, September and December; see Section A. (5.). 9. The Permittee shall perform three Effluent Pollutant Scans during the term of this permit; see Section A. (6.). 10. The Permittee has deferred receiving -stream sampling to the Lower Cape Fear River Program by memorandum of agreement (MOA). Should this MOA terminate for any reason, the Permittee shall immediately inform the Division in writing and immediately resume instream monitoring in accordance with this permit. 11. Stream samples shall be collected 3/week from June 1 through September 30, and collected weekly from October 1 through May 31. b. There shall be no discharge of floating solids or visible foam in other than trace amounts. Page 8 of 21 DocuSign Envelope ID: 82350931-7E08-43F3-B31A-0250B4908196 Permit NC0023973 A. (4.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS (24.0 MGD) [15A NCAC 02B .0400 et seq., 02B .0500 et seq.] a. Beginning upon receipt of the Engineer's Certification of completion of the 24.0 MGD expansion and lasting until permit expiration, the Permittee is authorized to discharge treated wastewater from Outfall 001. Such discharges shall be limited and monitoredi by the Permittee as specified below: EFFLUENT CHARACTERISTICS LIMITS MONITORING REQUIREMENTS Monthly Average Weekly Average Daily Maximum Measurement Frequency Sample Type Sample Location 2 Flow 24.0 MGD Continuous Recording Influent or Effluent BOD, 5-day, 20°C (Summer: April 1 through October 31) 3 5.0 mg/L g 7.5 mg/L g DailyComposite p Influent and Effluent BOD, 5-day, 20°C (Winter: 3 November 1 through March 31) 10.0 mg/L 15.0 mg/L Daily Composite Influent and Effluent Total Suspended Solids (TSS) 3 10.0 mg/L 15.0 mg/L Daily Composite Influent and Effluent NH3—N (Summer: April 1 through October 31) 1.0 mg/L 3.0 mg/L 3/Week Composite Effluent NH3—N (Winter: November 1 through March 31) 2.0 mg/L 6.0 mg/L 3/Week Composite Effluent Enterococci (geometric mean) 35/100 mL 276/100 mL Daily Grab Effluent Total Residual Chlorine (TRC) 4 13.0 lag/ Daily Grab Effluent Temperature (°C) Monitor and Report Daily Grab Effluent pH Between 6.8 and 8.5 Standard Units Daily Grab Effluent Dissolved Oxygen (DO) Daily average >_ 6.0 mg/L Daily Grab Effluent Total Nitrogen (mg/L) 5 Monitor and Report Monthly Composite Effluent Total Phosphorus (mg/L) Monitor and Report Monthly Composite Effluent Total Phenolic Compounds (pg/L) Monitor and Report Quarterly Composite Effluent Total Copper (pg/L) 6 1.8 pg/L 2.9 pg/L Monthly Composite Effluent Total Silver (µg/L) 7 Monitor and Report Quarterly Composite Effluent Chronic Toxicity 8 Ceriodaphnia dubia Pass/Fail at 6% effluent Quarterly Composite Effluent Effluent Pollutant Scan Monitor and Report Footnote 9 Footnote 9 Effluent Dissolved Oxygen (DO) (mg/L)1° Variable„ Grab Upstream, Downstream Temperature (°C)10 Variable„ Grab Upstream, Downstream All footnotes are listed on the following page. Page 9 of 21 DocuSign Envelope ID: 82350931-7E08-43F3-B31A-0250B4908196 Permit NC0023973 Footnotes: 1. Submit discharge monitoring reports electronically using NC DWR's eDMR application system; see Section A. (12.). 2. Upstream is at a point equidistant between the radio tower north of the WWTP and the northern end of the dredge spoil island immediately east of the outfall. Downstream is at a point equidistant between the mouth of Barnards Creek and the southern end of the dredge spoil island immediately east of the outfall. 3. The monthly average effluent BOD5 and Total Suspended Solids concentrations shall not exceed 15% of the respective influent value (85% removal). 4. Limit and monitor only if the facility adds chlorine or chlorine derivatives to wastewater that is eventually discharged. 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. 5. Total Nitrogen = TKN + NO3-N + NO2-N, where TKN is Total Kjeldahl Nitrogen, NO3-N is Nitrate Nitrogen, and NO2-N is Nitrite Nitrogen. 6. The facility shall follow the compliance schedule detailed in Section A. (9.). The Permittee shall achieve compliance with these limitations by November 29, 2022. 7. Total Silver shall be monitored using "clean" sampling techniques and reported to the lower reporting level of the procedure. 8. Whole Effluent Toxicity shall be monitored using the Pass/Fail Chronic Toxicity test with Ceriodaphnia dubia at 6% effluent. Samples shall be taken in March, June, September and December; see Section A. (5.). 9. The Permittee shall perform three Effluent Pollutant Scans during the term of this permit; see Section A. (6.). 10. The Permittee has deferred receiving -stream sampling to the Lower Cape Fear River Program by memorandum of agreement (MOA). Should this MOA terminate for any reason, the Permittee shall immediately inform the Division in writing and immediately resume instream monitoring in accordance with this permit. 11. Stream samples shall be collected 3/week from June 1 through September 30, and collected weekly from October 1 through May 31. b. There shall be no discharge of floating solids or visible foam in other than trace amounts. Page 10 of 21 DocuSign Envelope ID: 82350931-7E08-43F3-B31A-0250B4908196 Permit NC0023973 A. (5.) CHRONIC TOXICITY PERMIT LIMIT (Quarterly) [15A NCAC 02B .0200 et seq.] The effluent discharge shall at no time exhibit observable inhibition of reproduction or significant mortality to Ceriodaphnia dubia at an effluent concentration of 3.0% at 12 MGD; 4.0% at 16 MGD; 5.0% at 20 MGD; and 6.0% at 24 MGD. The permit holder shall perform at a minimum, quarterly monitoring using test procedures outlined in the "North Carolina Ceriodaphnia Chronic Effluent Bioassay Procedure," Revised December 2010, or subsequent versions or "North Carolina Phase II Chronic Whole Effluent Toxicity Test Procedure" (Revised- December 2010) or subsequent versions. The tests will be performed during the months of March, June, September and December. These months signify the first month of each three-month toxicity testing quarter assigned to the facility. Effluent sampling for this testing must be obtained during representative effluent discharge and shall be performed at the NPDES permitted final effluent discharge below all treatment processes. If the test procedure performed as the first test of any single quarter results in a failure or ChV below the permit limit, then multiple -concentration testing shall be performed at a minimum, in each of the two following months as described in "North Carolina Phase II Chronic Whole Effluent Toxicity Test Procedure" (Revised -December 2010) or subsequent versions. All toxicity testing results required as part of this permit condition will be entered on the Effluent Discharge Monitoring Form (MR-1) for the months in which tests were performed, using the parameter code TGP3B for the pass/fail results and THP3B for the Chronic Value. Additionally, DWR Form AT-3 (original) is to be sent to the following address: Attention: North Carolina Division of Water Resources Water Sciences Section / Aquatic Toxicology Branch 1621 Mail Service Center Raleigh, NC 27699-1621 Or, results can be sent to the email, ATForms.ATB@Licdenr.gov. ncdenr.gov. Completed Aquatic Toxicity Test Forms shall be filed with the Water Sciences Section no later than 30 days after the end of the reporting period for which the report is made. Test data shall be complete, accurate, include all supporting chemical/physical measurements and all concentration/response data, and be certified by laboratory supervisor and ORC or approved designate signature. Total residual chlorine of the effluent toxicity sample must be measured and reported if chlorine is employed for disinfection of the waste stream. Should there be no discharge of flow from the facility during a month in which toxicity monitoring is required, the Permittee will complete the information located at the top of the aquatic toxicity (AT) test form indicating the facility name, permit number, pipe number, county, and the month/year of the report with the notation of "No Flow" in the comment area of the form. The report shall be submitted to the Water Sciences Section at the address cited above. Should the Permittee fail to monitor during a month in which toxicity monitoring is required, monitoring will be required during the following month. Assessment of toxicity compliance is based on the toxicity testing quarter, which is the three-month time interval that begins on the first day of the month in which toxicity testing is required by this permit and continues until the final day of the third month. Should any test data from this monitoring requirement or tests performed by the North Carolina Division of Water Resources indicate potential impacts to the receiving stream, this permit may be re -opened and modified to include alternate monitoring requirements or limits. Page 11 of 21 DocuSign Envelope ID: 82350931-7E08-43F3-B31A-0250B4908196 Permit NC0023973 NOTE: Failure to achieve test conditions as specified in the cited document, such as minimum control organism survival, minimum control organism reproduction, and appropriate environmental controls, shall constitute an invalid test and will require immediate follow-up testing to be completed no later than the last day of the month following the month of the initial monitoring. Page 12 of 21 DocuSign Envelope ID: 82350931-7E08-43F3-B31A-0250B4908196 Permit NC0023973 A. (6.) EFFLUENT POLLUTANT SCAN (Municipal POTWs) [G.S. 143-215.1(b)] The Permittee shall perform a total of three (3) Effluent Pollutant Scans for all parameters listed below. One scan must be performed in each of the following years: 2019, 2020, and 2021. Analytical methods shall be in accordance with 40 CFR Part 136 and shall be sufficiently sensitive to determine whether parameters are present in concentrations greater than applicable standards and criteria. Samples should be collected with one quarterly toxicity test each year, and must represent seasonal variation [i.e., do not sample in the same quarter every year]. Unless otherwise indicated, metals shall be analyzed as "total recoverable." Ammonia (as N, NH3-N) Chlorine (total residual, TRC) Dissolved oxygen Nitrate/Nitrite Kjeldahl nitrogen Oil and grease Phosphorus Total dissolved solids Hardness Antimony Arsenic Beryllium Cadmium Chromium Copper Lead Mercury (EPA Method 1631E) Nickel Selenium Silver Thallium Zinc Cyanide Total phenolic compounds Volatile organic compounds: Acrolein Acrylonitrile Benzene Bromoform Carbon tetrachloride Chlorobenzene Chlorodibromomethane Chloroethane 2-chloroethylvinyl ether Chloroform Dichlorobromomethane 1,1-dichloroethane 1,2-dichloroethane Trans-1,2-dichloroethylene 1,1-dichloroethylene 1,2-dichloropropane 1,3-dichloropropylene Ethylbenzene Methyl bromide Methyl chloride Methylene chloride 1,1,2,2-tetrachloroethane Tetrachloroethylene Toluene 1,1,1-trichloroethane 1,1,2-trichloroethane Trichloroethylene Vinyl chloride Acid -extractable compounds: P-chloro-m-cresol 2-chlorophenol 2,4-dichlorophenol 2,4-dimethylphenol 4,6-dinitro-o-cresol 2,4-dinitrophenol 2-nitrophenol 4-nitrophenol Pentachlorophenol Phenol 2,4,6-trichlorophenol Base -neutral compounds: Acenaphthene Acenaphthylene Anthracene Benzidine Benzo(a)anthracene Benzo(a)pyrene 3,4 benzofluoranthene Benzo(ghi)perylene Benzo(k)fluoranthene Bis (2-chloroethoxy) methane Bis (2-chloroethyl) ether Bis (2-chloroisopropyl) ether Bis (2-ethylhexyl) phthalate 4-bromophenyl phenyl ether Butyl benzyl phthalate 2-chloronaphthalene 4-chlorophenyl phenyl ether Chrysene Di-n-butyl phthalate Di-n-octyl phthalate Dibenzo(a,h)anthracene 1,2-dichlorobenzene 1,3-dichlorobenzene 1,4-dichlorobenzene 3,3-dichlorobenzidine Diethyl phthalate Dimethyl phthalate 2,4-dinitrotoluene 2,6-dinitrotoluene 1,2-diphenylhydrazine Fluoranthene Fluorene Hexachlorobenzene Hexachlorobutadiene Hexachlorocyclo-pentadiene Hexachloroethane Indeno(1,2,3-cd)pyrene Isophorone Naphthalene Nitrobenzene N-nitrosodi-n-propylamine N-nitrosodimethylamine N-nitrosodiphenylamine Phenanthrene Pyrene 1,2,4-trichlorobenzene Page 13 of 21 DocuSign Envelope ID: 82350931-7E08-43F3-B31A-0250B4908196 Permit NC0023973 Reporting. Test results shall be reported on DWR Form -A MR-PPA1 (or in a form approved by the Director) by December 31' of each designated sampling year. The report shall be submitted to the following address: NC DEQ / DWR / Central Files, 1617 Mail Service Center, Raleigh, North Carolina 27699-1617. Additional Toxicity Testing Requirements for Municipal Permit Renewal. Please note that Municipal facilities that are subject to the Effluent Pollutant Scan requirements listed above are also subject to additional toxicity testing requirements specified in Federal Regulation 40 CFR 122.21(j)(5). The US EPA requires four (4) toxicity tests for a test organism other than the test species currently required in this permit. The multiple species tests should be conducted either quarterly for a 12-month period prior to submittal of the permit renewal application, or four tests performed at least annually in the four and one-half (41/2) year period prior to the application. These tests shall be performed for acute or chronic toxicity, whichever is specified in this permit. The multiple species toxicity test results shall be filed with the Aquatic Toxicology Branch at the following address: North Carolina Division of Water Resources Water Sciences Section / Aquatic Toxicology Branch 1621 Mail Service Center Raleigh, North Carolina 27699-1621 Contact the Division's Aquatic Toxicology Branch at 919-743-8401 for guidance on conducting the additional toxicity tests and reporting requirements. Results should also be summarized in Part E (Toxicity Testing Data) of EPA Municipal Application Form 2A, when submitting the permit renewal application to the NPDES Permitting Unit. Page 14 of 21 DocuSign Envelope ID: 82350931-7E08-43F3-B31A-0250B4908196 Permit NC0023973 A. (7.) MODELING REQUIREMENT [G.S. 143-215.1 (b)] 1. Dilution Study for 12 MGD: a) Should the Permittee choose to perform a Dilution Study for Outfall 001 to determine effluent dilution in the Cape Fear River prior to expansion above 12 MGD, then the Permittee shall submit a Dilution Study Plan to the Division for review and approval. The Plan shall include a proposed modeling approach and justification for the use of the selected model (CORMIX or equivalent), a proposed sampling protocol, and a timeline for completion of the study. A final model report shall be submitted to the Division within 30 days of completion of the study. The report shall include a summary of all data collected, model assumptions, model setup, model input and model results. The report shall be submitted to the following address: NC Division of Water Resources NPDES Complex Permitting Unit 1617 Mail Service Center Raleigh, NC 2699-1617 b) The dilution factor determined by the CORMIX model (or equivalent) shall be used by the Permittee for the chronic effluent test concentration once the model is reviewed and approved by the Division. 2. Dilution Study for expanded flows: a) The CORMIX (or equivalent) model used to determine dilution for Outfall 001 at 12 MGD shall be updated to evaluate dilution for the proposed expanded flows (16 MGD, 20 MGD, and 24 MGD). However, if a model was not developed for 12 MGD, then the Permittee shall submit a Dilution Study Plan for 16 MGD to the Division for review and approval prior to expansion. Guidelines detailed in Subsection A. (7.)(1.) above, shall be followed for the 16 MGD dilution study and model. The Permittee shall submit a revised model providing additional information regarding end -of -pipe dilution at the same time as the Authorization to Construct (AtC) application is submitted. The model shall address dilution at the approved increased flow rate into the Cape Fear River at M'Kean Maffit WWTP's discharge point for the proposed discharge configuration. The model report shall be submitted to the following address: NC Division of Water Resources NPDES Complex Permitting Unit 1617 Mail Service Center Raleigh, NC 2699-1617 b) The dilution factor determined by the CORMIX model (or equivalent) shall be used by the permittee for the chronic effluent test concentration once the model is reviewed and approved by the Division. Page 15 of 21 DocuSign Envelope ID: 82350931-7E08-43F3-B31A-0250B4908196 Permit NC0023973 A. (8.) MERCURY MINIMIZATION PLAN (MMP) [G.S. 143-215.1 (b)] The Permittee shall develop and implement a Mercury Minimization Plan (MMP) during this permit term. The MMP shall be developed by September 1, 2018, and shall be available for inspection on -site. A sample MMP was developed through a stakeholder review process and has been placed on the Division website for guidance (http://deq.nc.gov/about/divisions/water-resources/water-resources-permits/wastewater-branch/npdes- wastewater-permits, under Model Mercury Minimization Plan). The MMP should place emphasis on identification of mercury contributors and goals for reduction. Results shall be summarized and submitted with the next permit renewal. Performance of the MMP will meet the requirements of the TMDL (Total Maximum Daily Load) for mercury approved by USEPA on October 12, 2012, unless and until a Waste Load Allocation specific to this facility is developed and this NPDES permit is amended to require further actions to address the Waste Load Allocation. A. (9.) SCHEDULE OF COMPLIANCE FOR TOTAL COPPER LIMITATIONS [G.S. 143-215.1(b)] 1. By March 1, 2019, the Permittee shall submit to the Division of Water Resources a Corrective Action Plan summarizing the strategy or actions to be taken to achieve compliance with the Total Copper limitations listed in Sections A. (1.) through A. (4.), which includes specific dates for completion or implementation of each action. 2. By March 1, 2020, the Permittee shall submit a report to the Division summarizing actions taken in accordance with the Corrective Action Plan submitted and approved by DWR. 3. By March 1, 2021, the Permittee shall submit a report to the Division summarizing actions taken during the previous year to achieve compliance with the final copper limitations. The actions shall be in accordance with the Corrective Action Plan submitted and approved by DWR. 4. By March 1, 2022, the Permittee shall submit a report to the Division summarizing actions taken during the previous year to achieve compliance with the final copper limitations. The actions shall be in accordance with the Corrective Action Plan submitted and approved by DWR. 5. The Permittee shall achieve compliance with Total Copper limitations specified in Sections A. (1.) through A. (4.) by November 29, 2022. Upon approval of the Corrective Action Plan by the Division, the report and actions become an enforceable part of this permit. Any modifications to the schedule shall be requested to the Division at least ninety (90) days before the deadline. Modifications to the schedule in excess of four (4) months will be subject to public notice. Corrective Action Plan and Reports shall include the owner's name, NPDES permit number and Permittee contact person, and shall be submitted to: (1) NCDEQ / Division of Water Quality NPDES Permitting 1617 Mail Service Center Raleigh, NC 27699-1617 (2) NCDEQ / Division of Water Quality Wilmington Regional Office 127 Cardinal Drive Ext. Wilmington, NC 28405 Page 16 of 21 DocuSign Envelope ID: 82350931-7E08-43F3-B31A-0250B4908196 Permit NC0023973 A. (10.) HISTORICAL PERMIT LIMITS The Division recognizes that prior to issuance of this permit, the M'Kean Maffitt (Southside) WWTP was permitted to discharge with secondary limits of 25.0 mg/L CBOD5, 30.0 mg/L TSS, and no limit for NH3-N. At the permitted flow of 12.0 MGD, these limits translate approximately to mass loads of 457 tons per year (tpy) BOD5, 548 tpy TSS, and 365 tpy NH3-N (assuming 20 mg/L). The mass loads described in this paragraph will be one factor the Division considers when developing future wasteload allocations resulting from the TMDL process or when considering future expansion requests for the M'Kean Maffitt WWTP. A. (11.) ANTI -BACKSLIDING The BOD5 and NH3-N limits in this permit may be replaced with less stringent limits without violating state and Federal anti -backsliding provisions if: 1. Material and substantial alterations or additions to the permitted facility occurred after permit issuance that justifies less stringent limits; 2. Events occurred beyond the Permittee's control for which there is no reasonably available remedy; 3. Permittee has properly installed and operated required treatment equipment that cannot achieve permit limits; or 4. New information (other than revised regulations, guidance, or test methods) is available that justifies less stringent limits; and provided that the Division deems such modification appropriate and consistent with applicable laws and regulations. Page 17 of 21 DocuSign Envelope ID: 82350931-7E08-43F3-B31A-0250B4908196 Permit NC0023973 A. (12.) ELECTRONIC REPORTING OF MONITORING REPORTS [G.S. 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)] 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 monthly electronically using eDMR. The eDMR system allows permitted facilities to enter monitoring data and submit monthly DMRs electronically using the internet. The eDMR system may be accessed at: https://deq.nc.gov/about/divisions/water-resources/edmr. 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 Page 18 of 21 DocuSign Envelope ID: 82350931-7E08-43F3-B31A-0250B4908196 Permit NC0023973 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 shall not exceed five (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: '7 certi, 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 Page 19 of 21 DocuSign Envelope ID: 82350931-7E08-43F3-B31A-0250B4908196 Permit NC0023973 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 three (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 20 of 21 DocuSign Envelope ID: 82350931-7E08-43F3-B31A-0250B4908196 Permit NC0023973 Cape Fear Public Utility Authority M'Kean Maftiitt (Southside) WWTP Receiving Stream: Cape Fear River 8-Di q it H LI C: 03030005 Latitude: 34'09' 56" N Sub -Basin: 03-06-17 Longitude: 77`56'56" W Permitted Flow: 12.0MGDto24MGD Stream Class: SC-PNA Grid/Quad: K27 NW !Wilmington Facility Location not to scale x NPDES Permit No. NC0023973 New Hanover County Page 21 of 21