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HomeMy WebLinkAboutNC0063096_Draft Permit_20230405DocuSign Envelope ID: 8830695F-472C-407A-9C05-6ED362DF4061 ROY COOPER Governor ELIZABETH S. BISER Secretary RICHARD E. ROGERS, JR, Director NORTH CAROLINA Environmental Quality April 5, 2023 Mr. Terry Foster, Treatment Plant Manager/ORC Town of Holly Springs 128 S Main Street Holly Springs, North Carolina 27540 Subject: Dear Mr. Foster: Draft NPDES Permit Renewal Permit NCO063096 Utley Creek WRF Wake County Grade IV Biological WPCS SIC Code 4952 Enclosed with this letter is a copy of the Draft NPDES permit renewal for your facility. Please review this draft carefully to ensure thorough understanding of the requirements and conditions it contains. There are several changes from the existing permit, including the following: • Based on the reasonable potential analysis (RPA) showing no reasonable potential to violate state water quality standards, limits and monitoring requirement for lead have been removed from the permit [See A.(L) and A.(2.)]. • Based on NPDES guidance regarding the reduction of monitoring frequencies in NPDES permits for exceptionally performing facilities at your request, monitoring requirements for BOD5, NH3-N, Total Suspended Solids (TSS) and Fecal Coliform have been reduced to twice per week at the 6.0 MGD flow tier [See A.(1.)]. • Because Orthophosphate is the form of phosphate that is taken up by algae, which can lead to algal blooms, and because of the history of algal blooms at both Thomas Millpond and Green Tree Reservoir, effluent and downstream Orthophosphate monitoring is maintained in the permit [See A.(1.) through A.(3.)]. • Based on the additional incoming industrial users to your facility, Chloride monitoring has been increased to monthly at both flow tiers. [See A.(1.) and A.(2.)]. • Based on Mercury TMDL evaluation showing mercury values reported at levels > 1 ng/L and since the permitted flow is > 2 MGD, the Mercury Minimization Plan special condition has been reworded toward the plan's maintenance [See A.(6.)]. • To provide baseline data for comparison with monitoring data at D2 and D3, upstream monitoring has been added for those parameters monitored specifically at D2 and D3 at a monthly frequency [See A.(3.)]. • Some of the wording has changed in Special Condition A.(4.), Chronic Toxicity Permit Limit, please review each paragraph carefully. D E Q �/ North Carolina Department of Environmental Quality I Division of Water Resources v 512 North Salisbury Street 1 1611 Mail Service Center I Raleigh, North Carolina 27699-1611 NORTH nt of Em no 919.707.9000 Department M Envlronman�al Duali� DocuSign Envelope ID: 8830695F-472C-407A-9C05-6ED362DF4061 • Special Condition A.(5.) has been modified to include the specific three years in which the Effluent Pollutant Scan shall be performed (2025, 2026, and 2027). In addition, at the end of the Special Condition, 2nd species Toxicity Testing Requirements for municipal permit renewals per Federal Regulations [40 CFR 122.210)(5)] have been added. • Based on limited dataset from the investigative sampling in 2019 indicating detectable levels, monthly effluent monitoring for 1,4-Dioxane has been added to the permit [See A.(L) and A.(2.)]. • A permit reopener special condition has been added to modify 1,4-Dioxane monitoring, treatment and/or compliance [See A.(10.)]. • A special condition to monitor effluent PFAS chemicals quarterly has been added to the permit, to be effective six (6) months after EPA has a final wastewater method in 40 CFR136 method published in the Federal Register [See Special Condition A.(11.) PFAS Monitoring Requirements]. • 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. • 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.)]. • The map was modified to show the instream monitoring locations in relation to the facility and Outfall. 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 Wake 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, DAoccuu Signed Ib�y:'•-11 PC�iltIMLAH'^ 9FBBBC952DF8455... Gary Perlmutter, Environmental Specialist II NPDES Municipal Permitting Unit D E Q�� North Carolina Department of Environmental Quality I Division of Water Resources 512 North Salisbury Street 1 1611 Mail Service Center I Raleigh, North Carolina 27699-1611 NORTH CAROLINA 919.707.9000 Depanmem of Envlmnmenml Dual DocuSign Envelope ID: 8830695F-472C-407A-9C05-6ED362DF4061 Hardcopy: NPDES Files eCopy: US EPA Region 4 DWR/Raleigh Regional Office/Water Quality/Scott Vinson DWR/Operator Certification Program/Maureen Kinney DWR/Ecosystems Branch/Mark Vander Borgh DWR/Aquatic Toxicology Branch/Cindy Moore DWR/Municipal Permitting Unit/Keyes McGee DWR / D E Q�� North Carolina Department of Environmental Quality I Division of Water Resources 512 North Salisbury Street 1 1611 Mail Service Center I Raleigh, North Carolina 27699-1611 NORTH CAROLINA 919.707.9000 Depanmem of Envlmnmenml Dual DocuSign Envelope ID: 8830695F-472C-407A-9C05-6ED362DF4061 Permit NCO063096 STATE OF NORTH CAROLINA DEPARTMENT OF ENVIRONMENTAL QUALITY DIVISION OF WATER RESOURCES PERMIT TO DISCHARGE WASTEWATER UNDER THE NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM N( PDES) 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 Holly Springs is hereby authorized to discharge wastewater from a facility located at the Utley Creek Water Reclamation Facility 150 Treatment Plant Road Holly Springs Wake County to receiving waters designated as Utley Creek in the Cape Fear Dee River Basin in accordance with the effluent limitations, monitoring requirements, and other applicable conditions set forth in Parts I, II, III, and IV hereof. This permit shall become effective Month 1, 2023. This permit and authorization to discharge shall expire at midnight on July 31, 2028. Signed this day Month dd, 2023. DRAFT for Richard E. Rogers, Jr., Director Division of Water Resources By Authority of the Environmental Management Commission Page 1 of 16 DocuSign Envelope ID: 8830695F-472C-407A-9C05-6ED362DF4061 Permit NCO063096 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 Town of Holly Springs is hereby authorized to: 1. Continue to operate and maintain the Utley Creek Water Reclamation Facility identified on the Cover, an existing 6.0 MGD facility consisting of the following components: • Mechanical bar screens • Centrifugal grit chambers • Anaerobic phosphorus removal basins • Primary anoxic basins • Secondary anoxic basins • Reaeration basins • Chemical feed system with bulk chemical storage • Secondary clarifiers • Tertiary filtration • UV disinfection system • Cascade aerator • Aerobic digester • Solids stabilization/storage basin • Dewatering screw press • Biofilter for odor control 2. Upon receipt of an Authorization to Construct from the Division of Water Resources, construct an expanded facility with capacity of 8.0 MGD; 3. Upon submitting an Engineer's Certificate form, operate said treatment works at 8.0 MGD; and 4. Discharge from said treatment works at the location specified on the attached map via Outfall 001 into Utley Creek, classified C waters in the Cape Fear River Basin and 03030004 HUC. Page 2 of 16 DocuSign Envelope ID: 8830695F-472C-407A-9C05-6ED362DF4061 Permit NCO063096 PART A.(1.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS (6.0 MGD) [15A NCAC 02B .0400 et seq., 15A NCACO2B .0500 et seq.] Grade IV Biological Water Pollution Control System [15A NCAC 08G .0302] (a.) During the period beginning on the effective date of the permit and lasting until expansion to 8.0 MGD or permit expiration, whichever is sooner, the Permittee is authorized to discharge treated municipal and industrial wastewater from Outfall 001. Such discharges shall be limited and monitored 1 by the Permittee as specified below: EFFLUENT LIMITS MONITORING REQUIREMENTS PARAMETER Monthly Weekly Daily Measurement Sample Sample Parameter Code Average Average Maximum Frequency Type Location Flow 50050 6.0 MGD Continuous Recording Influent or Effluent BOD, 5-day, 200C 2 C0310 5.0 mg/L 7.5 mg/L 2/week 3 Composite Influent & (Apr 1 - Oct 31) Effluent BOD, 5-day, 200C 2 C0310 10.0 mg/L 15.0 mg/L 2/week 3 Composite Influent & (Nov 1 - Mar 31) Effluent Total Suspended Solids (TSS) 2 C0530 30.0 mg/L 45.0 mg/L 2/week 3 Composite Influent & Effluent Ammonia (NH3 as N) C0610 1.0 mg/L 3.0 mg/L 2/week3 Composite Effluent (Apr 1 - Oct 31) Ammonia (NH3 as N) C0610 2.0 mg/L 6.0 mg/L 2/week3 Composite Effluent (Nov 1 - Mar 31) Dissolved Oxygen (DO) 00300 Daily Average > 7.0 mg/L Daily Grab Effluent pH 00400 Between 6.0 and 9.0 Standard Units Daily Grab Effluent Fecal Coliform 31616 200/100 mL 400/100 mL 2/week3 Grab Effluent (geometric mean) Temperature, °C 00010 Monitor and Report Daily Grab Effluent Total Residual Chlorine 4 50060 1 1 17 µg/L Daily Grab Effluent Conductivity, µmhos/cm 00094 Monitor and Report Daily Grab Effluent Total Kjeldahl Nitrogen (TKN), 00625 Monitor and Report Weekly Composite Effluent mg/L Nitrate -Nitrite Nitrogen 00630 Monitor and Report Weekly Composite Effluent (NO3-N + NO2-N), mg/L Total Nitrogen 5 C0600 5.0 mg/L Weekly Calculated Effluent Total Phosphorus C0665 0.5 mg/L Weekly Composite Effluent Total Orthophosphate 70507 0.27 mg/L Weekly Composite Effluent Total Hardness' (as CaCO3), 00900 mg/L Monitor and Report Quarterly Composite Effluent Total Chlorides, mg/L 00940 Monitor and Report Monthly Composite Effluent Chronic Toxicity 7 TGP3B Monitor and Report Quarterly Composite Effluent 1,4-Dioxane 8 82388 Monitor and Report Monthly Grab Effluent PFAS, ng/L various Footnote 9 Quarterly Grab Effluent Effluent Pollutant Scan NCO] Monitor and Report Footnote 10 Footnote 10 Effluent Footnotes on next page. Page 3 of 16 DocuSign Envelope ID: 8830695F-472C-407A-9C05-6ED362DF4061 Permit NC0063096 Footnotes. 1. The Permittee shall submit Discharge Monitoring Reports electronically using NC DWR's eDMR application system. See Special Condition A. (12.). 2. The monthly average effluent BOD5 and Total Suspended Solids concentrations shall not exceed 15% of the respective influent value (85% removal). 3. Twice per week sampling must occur on any two non-consecutive days during the calendar week. 4. The facility shall monitor TRC if using chlorination for disinfection. The Division shall consider all effluent total residual chlorine 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, and NO3-N and NO2-N are Nitrate and Nitrite Nitrogen, respectively. 6. Hardness sampling shall coincide with sampling of metals. 7. Chronic Toxicity (Ceriodaphnia dubia) Pass/Fail at 90% effluent with testing in March, June, September, and December. See Special Condition A. (4.). 8. Samples shall be reported to a minimum of PQL < 1 µg/L using an appropriate 40 CFR Part 136 method. 9. Follow Special Condition A. (11.). 10. The Permittee shall perform three effluent pollution scans during the term of this permit. See Special Condition A. (5.). (b.) There shall be no discharge of floating solids or visible foam in other than trace amounts. Page 4 of 16 DocuSign Envelope ID: 8830695F-472C-407A-9CO5-6ED362DF4061 Permit NCO063096 A.(2.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS (8.0 MGD) [15A NCAC 02B .0400 et seq., 15A NCACO2B .0500 et seq.] Grade IV Biological Water Pollution Control System [15A NCAC 08G .0302] (a.) During the period beginning on expansion to 8.0 MGD and lasting until permit expiration, the Permittee is authorized to discharge treated municipal and industrial wastewater from Outfall 001. Such discharges shall be limited and monitored' by the Permittee as specified below: EFFLUENT LIMITS MONITORING REQUIREMENTS PARAMETER Monthly Weekly Daily Measurement Sample Sample Parameter Code Average Average Maximum Frequency Type Location Flow 50050 8.0 MGD Continuous Recording Influent or Effluent BOD, 5-day, 200C 2 Influent & (Apr 1 - Oct 31) C0310 5.0 mg/L 7.5 mg/L Daily Composite Effluent BOD, 5-day, 200C 2 C0310 10.0 mg/L 15.0 mg/L . Daily Composite Influent & (Nov 1 - Mar 31) Effluent Total Suspended Solids (TSS) 2 C0530 30.0 mg/L 45.0 mg/L Daily Composite Influent & Effluent Ammonia (NH3 as N) C0610 1.0 mg/L 3.0 mg/L Daily Composite Effluent (Apr 1 - Oct 31) Ammonia (NH3 as N) C0610 2.0 mg/L 6.0 mg/L Daily Composite Effluent (Nov 1 - Mar 31) Dissolved Oxygen (DO) 00300 Daily Average > 7.0 mg/L Daily Grab Effluent pH 00400 Between 6.0 and 9.0 Standard Units Daily Grab Effluent Fecal Coliform 31616 200/100 mL 400/100 mL Daily Grab Effluent (geometric mean) Temperature, °C 00010 Monitor and Report Daily Grab Effluent Total Residual Chlorine 3 50060 1 1 17 µg/L Daily Grab Effluent Conductivity, µmhos/cm 00094 Monitor and Report Daily Grab Effluent Total Kjeldahl Nitrogen (TKN), 00625 Monitor and Report Weekly Composite Effluent mg/L Nitrate -Nitrite Nitrogen 00630 Monitor and Report Weekly Composite Effluent (NO3-N + NO2-N), mg/L Total Nitrogen' C0600 5.0 mg/L Weekly Calculated Effluent Total Phosphorus C0665 0.5 mg/L Weekly Composite Effluent Total Orthophosphate 70507 0.27 mg/L Weekly Composite Effluent Total Hardness (as CaCO3) 5, 00900 mg/L Monitor and Report Quarterly Composite Effluent Total Chlorides, mg/L 00940 Monitor and Report Monthly Composite Effluent Chronic Toxicity' TGP3B Monitor and Report Quarterly Composite Effluent 1,4-Dioxane 7 82388 Monitor and Report Monthly Grab Efluent PFAS, ng/L various Footnote 8 Quarterly Grab Effluent Effluent Pollutant Scan NCO] Monitor and Report Footnote 9 Footnote 9 Effluent Footnotes on next page. Page 5 of 16 DocuSign Envelope ID: 8830695F-472C-407A-9C05-6ED362DF4061 Permit NC0063096 Footnotes. 1. The Permittee shall submit Discharge Monitoring Reports electronically using NC DWR's eDMR application system. See Special Condition A. (12.). 2. The monthly average effluent BOD5 and Total Suspended Solids concentrations shall not exceed 15% of the respective influent value (85% removal). 3. The facility shall monitor TRC if using chlorination for disinfection. The Division shall consider all effluent total residual chlorine 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. 4. Total Nitrogen = TKN + NO3-N + NO2-N, where TKN is Total Kjeldahl Nitrogen, and NO3-N and NO2-N are Nitrate and Nitrite Nitrogen, respectively. 5. Hardness sampling shall coincide with sampling of metals. 6. Chronic Toxicity (Ceriodaphnia dubia) Pass/Fail at 90% effluent with testing in March, June, September, and December. See Special Condition A. (4.). 7. Samples shall be reported to a minimum of PQL < 1 µg/L using an appropriate 40 CFR Part 136 method. 8. Follow Special Condition A. (11.). 9. The Permittee shall perform three effluent pollution scans during the term of this permit. See Special Condition A. (5.). There shall be no discharge of floating solids or visible foam in other than trace amounts. Page 6 of 16 DocuSign Envelope ID: 8830695F-472C-407A-9C05-6ED362DF4061 Permit NCO063096 A.(3.) INSTREAM MONITORING REQUIREMENTS [15A NCAC 02B .0200 et seq.] Beginning on the effective date of this permit and lasting until the expiration date, the Permittee shall perform instream sampling upstream and downstream of Outfall 001 as specified below: Parameters Measurement Frequency Sample Type Sample Location' Dissolved Oxygen (DO), mg/L Temperature, °C 3/Week (June -September) pH, SU Weekly (October -May) Grab U, DI Conductivity, µmhos/cm Total Hardness (as CaCO3), Monthly Grab U mg/L Ammonia, mg/L TKN, mg/L NO2+NO31 mg/L Total Nitrogen, mg/L Monthly Grab U, D2, D3 Orthophosphate mg/L Total Phosphorus, mg/L Chlorophyll -a, µg/L Turbidity, NTU Dissolved Oxygen (DO), mg/L Temperature, °C pH, SU Monthly Grab D2, D3 Conductivity, µmhos/cm BOD5, mg/L Footnote. 1. U (UTC-1): Utley Creek upstream of WWTP; geocoordinates: 35.64494°N, 78.84963°W D1 (UTC-lA): Utley Creek immediately downstream of WWTP; 35.64486°N, 78.85276°W D2 (UTC-5): Thomas Mill Pond; 35.64633°N, 78.87128°W D3 (UTC-7): Utley Creek below Green Tree Reservoir Dam; 35.64481°N, 78.88473°W UTC equivalent sample locations from Holly Springs WRF Discharge Evaluation (CH2M Hill 2014). The Permittee is a member of the Middle Cape Fear River Basin Association (MCFRBA). Because of site specific concerns, sampling at these instream locations may not be waived or exempted by participation in the MCFRBA monitoring program. These data may be collected and submitted by the MCFRBA but remain the responsibility of the Permittee. Page 7 of 16 DocuSign Envelope ID: 8830695F-472C-407A-9C05-6ED362DF4061 Permit NCO063096 A.(4.) CHRONIC TOXICITY PERMIT LIMIT (QUARTERLY) — 6.0 MGD AND 8.0 MGD [15A NCAC 02B .0200] [15A NCAC 02B .0500 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 90% at 6.0 and 8.0 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 February May, August and November. 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 electronically using the Division's eDMR system for the months in which tests were performed, using the parameter code TGP3B for the pass/fail results and THP311 for the Chronic Value. Additionally, DWR Form AT-3 (original) is to be sent to the following address: 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(a)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. Page 8 of 16 DocuSign Envelope ID: 8830695F-472C-407A-9C05-6ED362DF4061 Permit NC0063096 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. 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 9 of 16 DocuSign Envelope ID: 8830695F-472C-407A-9C05-6ED362DF4061 Permit NCO063096 A.(5.) ADDITIONAL MONITORING REQUIREMENTS FOR PERMIT RENEWAL [NCGS 143-215.1(b)] (a.) Effluent Pollutant Scans. The Permittee shall perform a total of three (3) Effluent Pollutant Scans for all parameters listed below. For the 6.0 MGD flow tier, one scan must be performed in each of the following years: 2025, 2026, and 2027. For the 8.0 MGD flow tier, the Permittee shall perform three effluent pollution scans in the three following years after expansion is in effect. 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. Each annual sample shall coincide with one quarterly toxicity test each year [see Condition A. (3.)] and each must be collected in a different calendar quarter to 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) C0610 Trans-1,2-dichloroethylene 34546 Bis (2-chloroethyl) ether Chlorine (total residual, TRC) 50060 1, 1 -dichloroethylene 34501 Bis (2-chloroisopropyl) ether Dissolved oxygen 00300 1,2-dichloropropane C0541 Bis (2-ethylhexyl) phthalate Nitrate / Nitrite 00630 1,3-dichloropropylene 77163 4-bromophenyl phenyl ether Kjeldahl nitrogen 00625 Ethylbenzene 34371 Butyl benzyl phthalate Oil and grease 00556 Methyl bromide 34413 2-chloronaphthalene Phosphorus C0665 Methyl chloride 34418 4-chlorophenyl phenyl ether Total dissolved solids 70295 Methylene chloride 34423 Chrysene Hardness 00900 1,1,2,2-tetrachloroethane 81549 Di-n-butyl phthalate Antimony 01097 Tetrachloroethylene 34475 Di-n-octyl phthalate Arsenic 01002 Toluene 34010 Dibenzo(a,h)anthracene Beryllium 01012 1, 1, 1 -trichloroethane 34506 1,2-dichlorobenzene Cadmium 01027 1,1,2-trichloroethane 34511 1,3-dichlorobenzene Chromium C0034 Trichloroethylene 39180 1,4-dichlorobenzene Copper 01042 Vinyl chloride 39175 3,3-dichlorobenzidine Lead 01051 Acid -extractable compounds: Diethyl phthalate Mercury (Method 1631E) COMER P-chloro-m-cresol 34452 Dimethyl phthalate Nickel 01067 2-chlorophenol 34586 2,4-dinitrotoluene Selenium 01147 2,4-dichlorophenol 34601 2,6-dinitrotoluene Silver 01077 2,4-dimethylphenol 34606 1,2-diphenylhydrazine Thallium 01059 4,6-dinitro-o-cresol 34657 Fluoranthene Zinc 01092 2,4-dinitrophenol 34616 Fluorene Cyanide 00720 2-nitrophenol 34591 Hexachlorobenzene Total phenolic compounds 32730 4-nitrophenol 34646 Hexachlorobutadiene Volatile orzanic compounds: Pentachlorophenol 39032 Hexachlorocyclo-pentadiene Acrolein 34210 Phenol 34694 Hexachloroethane Acrylonitrile 34215 2,4,6-trichlorophenol 34621 Indeno(1,2,3-cd)pyrene Benzene 34030 Base -neutral compounds: Isophorone Bromoform 32104 Acenaphthene 34205 Naphthalene Carbon tetrachloride 32102 Acenaphthylene 34200 Nitrobenzene Chlorobenzene 34301 Anthracene CO220 N-nitrosodi-n-propylamine Chlorodibromomethane 34306 Benzidine 39120 N-nitrosodimethylamine Chloroethane 85811 Benzo(a)anthracene C0526 N-nitrosodiphenylamine 2-chloroethyl vinyl ether 34576 Benzo(a)pyrene 34247 Phenanthrene Chloroform 32106 3,4 benzofluoranthene 34230 Pyrene Dichlorobromomethane 32101 Benzo(ghi)perylene 34521 1,2,4-trichlorobenzene 1, 1 -dichloroethane 34496 Benzo(k)fluoranthene 34242 1,2-dichloroethane 32103 Bis (2-chloroethoxy) methane 34278 Page 10 of 16 34273 34283 C0100 34636 34292 34581 34641 34320 39110 34596 34556 34536 34566 34571 34631 34336 34341 34611 C0626 34346 C0376 34381 C0700 C0702 34386 34396 34403 34408 34696 34447 34428 34438 34433 34461 34469 C0551 DocuSign Envelope ID: 8830695F-472C-407A-9C05-6ED362DF4061 Permit NC0063096 (b.) Effluent Scan Reporting. Test results shall be reported electronically via eDMR by December 31 st of each designated sampling year, except that, subject to prior written approval by the Director, results can be reported on DWR Form DMR-PPA-1 or other form approved by the Director. The permittee must at least report completion of the test in the eDMR system by entering " 1 " or "Y" for parameter code NCO 1 - Annual Pollutant Scan. If written reports are approved, the report shall be submitted to the following address: North Carolina Division of Water Resources Central Files 1617 Mail Service Center Raleigh, North Carolina 27699-1617 Or the form may be uploaded at: https://edocs.deq.nc.gov/Fonns/NPDES WW-EDMR- Soplemental-Form (c.) 2"-Species Toxicity Testing and Reporting. (i.) In addition to the quarterly toxicity tests required in Condition A. (3.) CHRONIC TOXICITY PERMIT LIMIT (QUARTERLY), the Permittee shall perform and report the results of four (4) toxicity tests using the same test methods using a second species of test organism suitable to the tests being conducted. (ii.) The 2nd species toxicity tests shall be conducted either: (A) Once per quarter in a single 12-month period (four samples); if this option is chosen, the sample for each 2nd species test shall coincide with the quarterly samples collected for (tox condition title); or (B) Once per 12-month period in the four -and one-half year period prior to the scheduled application for permit renewal (four samples); if this option is chosen, three of the sample for the 2nd species test shall coincide with those for the annual effluent scans and the coincident quarterly toxicity test, and each of the four annual samples shall be collected in a different calendar quarter in order to represent seasonal variation. (iii.) The results of the toxicity tests shall be submitted to the following address: North Carolina Division of Water Resources Water Sciences Section/Aquatic Toxicology Branch 1621 Mail Service Center Raleigh, North Carolina 27699-1621 Or, results can be sent to the email, ATForms.ATB@ncdenr.gov. (iv.) Results of the 2nd species tests shall also be summarized in Part E (Toxicity Testing Data) of EPA Municipal Application Form 2A when submitting the permit renewal application to the NPDES Wastewater Program. The Permittee may contact the Division's Aquatic Toxicology Branch at 919-743-8401 for guidance on conducting the additional toxicity tests and reporting of the results. Page 11 of 16 DocuSign Envelope ID: 8830695F-472C-407A-9C05-6ED362DF4061 Permit NCO063096 A. (6.) MERCURY MINIMIZATION PLAN (MMP) [NCGS 143-215.1 (b)] The Permittee shall continue implementing the mercury minimization plan during this permit term. 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 Mercury Minimization Plan 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. (7.) PERMIT RE -OPENER: SUPPLEMENTARY NUTRIENT MONITORING [ 15A NCAC 2H.0112 (b) (1) and 15A NCAC 2H.0114 (a)] Pursuant to N.C. General Statutes Section 143-215.1 and the implementing rules found in Title 15A of the North Carolina Administrative Code, Subchapter 02H, specifically, 15A NCAC 02H.0112(b)(1) and 02H.0I 14(a), and Part II, Sections B.12. and B.13. of this Permit, the Director of DWQ may reopen this permit to require supplemental nutrient monitoring of the discharge. The additional monitoring will be to support water quality modeling efforts within the Cape Fear River Basin, and shall be consistent with a monitoring plan developed jointly by the Division and affected stakeholders. A. (8.) DAM MODIFICATION RE -OPENER [NSGS 143-215.1(b)] If Duke Energy modifies the operations at Thomas Millpond or Greentree Reservoir and results in changes to stream hydrology, then the permit may be reopened to evaluate the impact of such changes on the water quality of Thomas Millpond and Greentree Reservoir. A. (9.) DOWNSTREAM WATER QUALITY RE -OPENER [NSGS 143-215.1(b)] If water quality standards violations are reported in downstream waters and the discharge from Utley Creek WRF is identified as a causative factor, then the permit may be reopened and mitigative measures, including additional treatment or change in outfall location, may be required. A. (10.) REOPENER FOR 1,4-DIOXANE [NCGS 143-215.1 (b)] Pursuant to N.C. General Statutes Section 143-215.1 and the implementing rules found in the North Carolina Administrative Code at 15A NCAC 2H.0112 (b) (1) and 2H.0114 (a) and Part II, Sections B-12 and B-13 of this permit, the Director of DWR may reopen this permit to modify permit requirements to address 1,4-Dioxane monitoring, treatment and/or compliance. Page 12 of 16 DocuSign Envelope ID: 8830695F-472C-407A-9C05-6ED362DF4061 Permit NCO063096 A. (11.) PFAS MONITORING REQUIREMENT [NCGS 143-215.1(b)] This reporting requirement for the per- and polyfluoroalkyl substances (PFAS) parameters listed under Table 1 of the Final Method 1633 takes effect the first full calendar quarter following six (6) months after EPA publishes a 40 CFR Part 136 Final PFAS Method for wastewater in the Federal Register. Monitoring will be at a quarterly frequency. Find the current parameters listed under Table 1 of the 3rd Draft Method 1633 Analysis of Per- and Polyfluoroalkyl Substances (PFAS) in Aqueous, Solid, Biosolids, and Tissue Samples by LC-MS/MS at: https://www.epa. gov/system/files/documents/2022- 12/3rd%20Draft%20Method%201633%20December%202022%2012-20-22_508.pdf A.(12.) ELECTRONIC REPORTING - DISCHARGE 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 monthly 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:Hdeq.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. Page 13 of 16 DocuSign Envelope ID: 8830695F-472C-407A-9C05-6ED362DF4061 Permit NC0063096 Monitoring results obtained during the previous month(s) shall be summarized for each month and reported via the eDMR system no later than the last calendar day of the month following the completed reporting period. 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; and 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.federalre ig ster.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 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: hLtp:Hdeq.nc.gov/about/divisions/water-resources/edmr Page 14 of 16 DocuSign Envelope ID: 8830695F-472C-407A-9C05-6ED362DF4061 Permit NC0063096 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: htt2:Hdeq.nc.14ov/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.)] 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 15 of 16