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HomeMy WebLinkAboutNC0037834_Draft Permit_20240118DocuSign Envelope ID: FB9D7lD6-625A-45D5-B5F6-78178EO3DDOC ROY COOPER Governor ELIZABETH S. BISER Secretary RICHARD E. ROGERS, JR. Director Ms. Courtney Driver, P.E. Director of Utilities City of Winston-Salem PO Box 2511 Winston-Salem, North Carolina 27102 Dear Ms. Driver: NORTH CAROLINA Environmental Quality January 18, 2024 Subject: Draft NPDES Permit Renewal Permit NCO037834 Archie Elledge WWTP Forsyth 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 final winter ammonia limits becoming effective on June 1, 2018, the interim winter ammonia limits and the compliance schedule for winter ammonia limits have been removed from the permit [See A. (1.)]. • Based on discussion with Division's Laboratory Certification Branch, The PQL for Total Cyanide was lowered to 10 µg/L (See A. (L), Footnote 6]. • To better understand nitrogen pollution characteristics, Total Kjeldahl Nitrogen (TKN) and Nitrate - Nitrite (NO3+NO2) monthly monitoring have been added to the permit [See A. (1.)]. • Based on the receiving stream's impairment for copper, quarterly monitoring for Total Copper has been added to the permit. • Based on the reasonable potential analysis (RPA) showing no reasonable potential to violate state water quality standards, the monitoring requirement for Dichlorobromomethane and Chlorodibromomethane have been removed from the permit [See A. (1)]. • Based on NPDES guidance regarding the reduction of monitoring frequencies in NPDES permits for exceptionally performing facilities, an evaluation of effluent BOD5, N113-N, Total Suspended Solids (TSS) and Fecal Coliform has resulted in meeting numeric criteria. Monitoring frequencies for all the above parameters are maintained at 2/week [See A. (1.)]. • Instream monitoring requirements have been moved to a separate condition [See A. (2)]. • Some of the wording has changed in Special Condition A. (3.), Chronic Toxicity Permit Limit, please review each paragraph carefully. • Some of the wording has changed in Special Condition A. (4.), including the specific three years in which the Effluent Pollutant Scan shall be performed (2025, 2026, and 2027), please review each paragraph carefully. North Carolina Department of Environmental Quality I Division of Water Resources D E Q 512 North Salisbury Street 1 1611 Mail Service Center I Raleigh, North Carolina 27699-1611 919.707.9000 DocuSign Envelope ID: FB9D71D6-625A-45D5-B5F6-78178E03DDOC • Based on Mercury TMDL evaluation showing mercury values reported at levels > 1 ng/L and since the permitted flow is greater than 2 MGD, the language in the Mercury Minimization Plan has been revised toward its maintenance [See A. (6)]. • Based on the potential of 1,4-Dioxane passing through the WWTP system from certain industrial user types including metal finishers, monthly effluent monitoring for 1,4-Dioxane with the option to request reduction to quarterly after 24 months based on data review [See A. (L)]. In addition, a 1,4-Dioxane reopener condition has been added to the permit and [See A. (8.)]. • To assess the industrial contribution of PFAS to the Pilot Creek WWTP and assess levels of PFAS compounds in the facility effluent, Special Condition A. (9.) has been added to the permit. Please review each paragraph carefully. • The map was revised and expanded to show instream monitoring locations. 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 Forsyth 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@deq.nc.gov. Sincerely, EDowftned by: PU4A 9FB8 C952DFM55... Gary Perlmutter, Environmental Specialist II NPDES Municipal Permitting Unit Hardcopy: NPDES Files eCopy: US EPA Region 4 DWR/Winston-Salem Regional Office/Water Quality/Lon Snider and Jenny Graznak DWR/Operator Certification Program/Maureen Kinney DWR/Ecosystems Branch/Mark Vander Borgh DWR/Aquatic Toxicology Branch/Cindy Moore and Molly Nicholson DWR/Municipal Permitting Unit/Keyes McGee DWR/Public Water Supply/Eric Hudson City of Winston-Salem / K. Heath Petree (ORC), Bonnie McKee and Ozie Keith Jones North Carolina Department of Environmental Quality I Division of Water Resources D E Q�� 512 North Salisbury Street 1 1611 Mail Service Center I Raleigh, North Carolina 27699-1611 M�HNI r N (J���N� 0W-%-„ .FEWF,,,,,row,v\ /`� 919.707.9000 DocuSign Envelope ID: FB9D71D6-625A-45D5-B5F6-78178EO3DDOC Permit NCO037834 STATE OF NORTH CAROLINA DEPARTMENT OF ENVIRONMENTAL QUALITY DIVISION OF WATER RESOURCES PERMIT TO DISCHARGE WASTEWATER UNDER THE NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM INPDESI 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 City of Winston-Salem is hereby authorized to discharge wastewater from a facility located at the Archie Elledge Wastewater Treatment Plant 2801 Griffith Road Southwest of Winston-Salem Forsyth County to receiving waters designated as Salem Creek in the Yadkin -Pee 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 mmm dd, 20yy. This permit and authorization to discharge shall expire at midnight on June 30, 2028. Signed this day mmm dd, 20yy. DRAFT for Richard E. Rogers, Jr., Director Division of Water Resources By Authority of the Environmental Management Commission Page 1 of 17 DocuSign Envelope ID: FB9D71D6-625A-45D5-B5F6-78178E03DDOC Permit NCO037834 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. City of Winston-Salem is hereby authorized to: 1. Continue to operate and maintain the wastewater treatment works identified on the Cover, an existing 30.0 MGD facility consisting of the following components: • Mechanical screening and grit removal • Primary clarification • Aeration basins • Final clarification • Sodium hypochlorite and bisulfite feed for disinfection and dechlorinatio • Lime/magnesium hydroxide blend and caustic feed for alkalinity control • Three (3) centrifuges with screw conveyors • Sludge digestion • Gravity belt thickener facilities • Flo equalization facilities • Polymer and iron salt feed tit ies • Odor control system • Sludge drying facility • Waste sludge lagoons • Instrumental flow measurement 2. Discharge from said treatment works at the location specified on the attached map via Outfall 001 into the Salem Creek classified C waters in the Yadkin -Pee Dee River Basin and 03040103 HUC. U Page 2 of 17 DocuSign Envelope ID: FB9D71D6-625A-45D5-B5F6-78178EO3DDOC Permit NCO037834 PART A.(1.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS [15A NCAC 02B .0400 et seq.; 15A NCAC 02B .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 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: PARAMETER Parameter Code EFFLUENT LIMITS MONITORING REQUIREMENTS Monthly Averalle Weekly Average Daily Maximum Measurement Frequency Sample Type Sample Location Flow 50050 30.0 MGD Continuous RecordingInfluent or Effluent BOD, 5-day, 20°C 2 (Apr 1 - Oct 31) C0310 21.0 mg/L 31.5 mg/L 2/week3 Composite Influent and Effluent BOD, 5-day, 20°C 2 (Nov 1 - Mar 31) C0310 30.0 mg/L 45.0 mg/L 3 2/week Composite Influent and Effluent Total Suspended Solids (TSS) 2 C0530 30.0 mg/L 45.0 mg/L 2/week 3 Composite Influent and Effluent NH3 as N (Apr 1 - Oct 31 C0610 1.2 mgfL 3.6 m 2/week3 Composite Effluent NH3 as N(Nov 1 - Mar 31 C0610 2.4 m 7.2 m 2/week 3 Composite Effluent Fecal Coliform 31616 (geometric mean 200/100 mL 400/100 mL 2/week3 Grab Effluent Total Residual Chlorine (TRC) 4 50060 22.5 Daily Grab Effluent Dissolved Oxygen 00300 Daily Average > 6.5 mg/L Daily Grab Effluent H 00400 Between 6.0 and 9.0 Standard Units Daily Grab Effluent Temperature OC 00010 Monitor and Report Daily Grab Effluent Conductivity mhos/cm 00094 Monitor and Report Monthly Grab Effluent TKN m 00625 Monitor and Report Monthly Composite Effluent NO3-N + NO2-N m 00630 Monitor and Report Monthly Composite Effluent Total Nitrogen, m C0600 Monitor and Report Monthly Calculated Effluent Total Phosphorus m C0665 Monitor and Report Monthly Composite Effluent Total Cyanide a(gg/L)00720 Monitor and Report Quarterly Composite Effluent Total Copper 01042 Monitor and Report Quarterly Composite Effluent Total Zinc 01092 Monitor and Report Quarterly Composite Effluent 1 4-Dioxane 82388 Monitor and Report Monthly Grab Effluent PFAS n various Footnote 8 Q rly Grab Effluent Chronic Toxicity s TGP3B Monitor and Report Quarterly Composite Effluent Effluent Pollutant Scan 10 NCO] Monitor and Report Footnote 11 Footnote 11 Effluent Total Hardness (as CaCO3) 11 00900 m Monitor and Report Quarterly Composite Effluent Footnotes: 1. The Permittee shall submit Discharge Monitoring Reports electronically using NC DWR's eDMR application system. See Special Condition A.(10.). 2. The monthly average effluent BOD5 and TSS 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 when 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. Page 3 of 17 DocuSign Envelope ID: FB9D71D6-625A-45D5-B5F6-78178EO3DDOC Permit NCO037834 Footnotes (continued): 5. For a given wastewater sample, TN = TKN + NO3-N + NO2-N, where TN is Total Nitrogen, TKN is Total Kjeldahl Nitrogen, and NO3-N and NO2-N are Nitrate and Nitrite Nitrogen, respectively. 6. The Division shall consider all values reported below 10 µg/L to be "compliant" with this permit. However, the Permittee shall submit to DWR all values reported by a North Carolina -certified test method (even if values fall below 10 µg/L), and the Permittee shall consider all reported values when calculating averages, if any, as required under this permit. 7. Samples shall be analyzed and reported using sufficiently sensitive test procedures (i.e., methods) approved under 40 CFR Part 136 for the analysis of pollutants or pollutant parameters. After a 24-month sampling period, the Permittee may request the Division conduct a review of submitted data for assessment and approval of a 1,4- dioxane monitoring frequency reduction from monthly to quarterly. 8. Follow Special Condition A.(9.). 9. Chronic Toxicity (Ceriodaphnia dubia) P/F at 76% with testing in January, April, July, and October. See Special Condition A.(3.). 10. The Permittee shall perform three effluent pollution scans during the term of this permit. See Special Condition A.(4.). 11. Effluent hardness samples shall coincide with sampling for metals at least quarterly. There shall be no discharge of floating solids or visible foam in other than trace amounts. Page 4 of 17 DocuSign Envelope ID: FB9D71D6-625A-45D5-B5F6-78178EO3DDOC Permit NCO037834 A.(2.) 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: PARAMETER SAMPLE MONITORING FREQUENCY SAMPLE Parameter Code TYPE Jun i — Se 30 I Oct 1— Ma 31 LOCATION Total Hardness (as CaCO3), 00900 Surface Quarterly Upstream m BOD, 5-day, 20°C (mg/L) C0310 Surface Weekly Upstream, Downstream NH3 as N (mg/L) C0610 Surface Weekly Upstream, Downstream Temperature (°C) 00010 Surface 3/week Weekly Upstream, Downstream Dissolved Oxygen (DO) (mg/L) 00300 Surface 3/week Weeklv Upstream, Downstream Fecal Coliform (cfu/100 mL) 31616 Surface 3/week Weekly Upstream, Downstream Conductivity (µmhos/cm) 00094 Surface Monthly Upstream, Downstream TKN (mg/L) 00625 Surface Monthly Upstream, Downstream NO3-N + NO2-N (mg/L) 00630 Surface Monthly Upstream, Downstream Total Nitrogen 3 (mg/L) C0600 Surface Monthly Upstream, Downstream Total Phosphorus (mg/L) C0665 Surface Monthly Upstream, Downstream Footnotes: 1. Upstream is located in Salem Creek —1300 ft above NCSR 1120 (Clemmonsville Rd); downstream is located at (1): Salem Creek at NCSR 2991 (Fraternity Church Rd), and (2): Muddy Creek at NCSR 1493 (Frye Bridge Rd). Instream monitoring for all above parameters except Hardness is provisionally waived considering the Permittee's participation in the Yadkin -Pee Dee River Basin Association. Instream monitoring shall be immediately reinstated, and the Division shall be notified immediately should the Permittee end its participation in the Association. 2. The Permittee shall sample instream Total Hardness, upstream of the facility's discharge. The sample shall be representative of the hardness in the receiving stream. 3. For a given streamwater sample, TN = TKN + NO3-N + NO2-N, where TN is Total Nitrogen, TKN is Total Kjeldahl Nitrogen, and NO3-N and NO2-N are Nitrate and Nitrite Nitrogen, respectively. A.(3.) CHRONIC TOXICITY PERMIT LIMIT (QUARTERLY) [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 76%. 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 Page 5 of 17 DocuSign Envelope ID: FB9D71D6-625A-45D5-B5F6-78178EO3DDOC Permit NCO037834 January, April, July, and October. 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 1621 Mail Service Center Raleigh, NC 27699-1621 Or, results can be sent to the email, ATForms.ATB@dey.nc.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. 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 6 of 17 DocuSign Envelope ID: FB9D7lD6-625A-45D5-B5F6-78178EO3DDOC Permit NCO037834 A.(4.) 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. One scan must be performed in each of the following years: 2025, 2026, and 2027. 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.) CHRONIC TOXICITY PERMIT LIMIT] 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 34273 Chlorine (total residual, TRC) 50060 1, 1 -dichloroethylene 34501 Bis (2-chloroisopropyl) ether 34283 Dissolved oxygen 00300 1,2-dichloropropane C0541 Bis (2-ethylhexyl) phthalate CO100 Nitrate / Nitrite 00630 1,3-dichloropropylene 77163 4-bromophenyl phenyl ether 34636 Kjeldahl nitrogen 00625 Ethylbenzene - 4371 Butyl benzyl phthalate 34292 Oil and grease 00556 Methyl bromide 34413 2-chloronaphthalene 34581 Phosphorus C0665 Methyl chloride 34418 4-chlorophenyl phenyl ether 34641 Total dissolved solids 70295 Methylene chloride 34423 Chrysene 34320 Hardness 00900 1,1,2,2-tetrachloroethane 81549 Di-n-butyl phthalate 39110 Antimony 01097 Tetrachloroethylene 34475 Di-n-octyl phthalate 34596 Arsenic 0100 :, Toluene 34010 Dibenzo(a h)anthracene 34556 Beryllium 01012 `' 1,1,1-trichloroethane 34506 1,2-dichlorobenzene 34536 Cadmium 01027 1,1,2-trichloroethane 34511 1,3-dichlorobenzene 34566 Chromium C0034 Trichloroethylene 39180 1,4-dichlorobenzene 34571 Copper :F 01042 Vinyl chloride 39175 3,3-dichlorobenzidine 34631 Lead 01051 Acid -extractable compounds: Diethyl phthalate 34336 Mercury (Method 163 1E COMER P-chloro-m-cresol 34452 Dimethyl phthalate 34341 Nickel q 01067 2-chlorophenol 34586 2,4-dinitrotoluene 34611 Selenium 01147 2,4-dichlorophenol 34601 2,6-dinitrotoluene C0626 Silver 01077 2,4-dimethylphenol 34606 1,2-diphenylhydrazine 34346 01059 4,6-dinitro-o-cresol 34657 Fluoranthene C0376 Zinc 01092 2,4-dinitrophenol 34616 Fluorene 34381 Cyanide (PQL < 10 ug/L) 00720 2-nitrophenol 34591 Hexachlorobenzene C0700 Total phenolic compounds 32730 4-nitrophenol 34646 Hexachlorobutadiene C0702 Volatile orranic compounds: Pentachlorophenol 39032 Hexachlorocyclo-pentadiene 34386 Acrolein 34210 Phenol 34694 Hexachloroethane 34396 Acrylonitrile f 34215 2,4,6-trichlorophenol 34621 Indeno(1,2,3-cd)pyrene 34403 Benzene 34030 Base -neutral compounds: Isophorone 34408 Bromoform 32104 Acenaphthene 34205 Naphthalene 34696 Carbon tetrachloride 32102 Acenaphthylene 34200 Nitrobenzene 34447 Chlorobenzene 34301 Anthracene CO220 N-nitrosodi-n-propylamine 34428 Chlorodibromomethane 34306 Benzidine 39120 N-nitrosodimethylamine 34438 Chloroethane 85811 Benzo(a)anthracene C0526 N-nitrosodiphenylamine 34433 2-chloroethyl vinyl ether 34576 Benzo(a)pyrene 34247 Phenanthrene 34461 Chloroform 32106 3,4 benzofluoranthene 34230 Pyrene 34469 Dichlorobromomethane 32101 Benzo(ghi)perylene 34521 1,2,4-trichlorobenzene C0551 1,1-dichloroethane 34496 Benzo(k)fluoranthene 34242 1,2-dichloroethane 32103 Bis (2-chloroethoxy) methane 34278 Page 7 of 17 DocuSign Envelope ID: FB9D71D6-625A-45D5-B5F6-78178EO3DDOC Permit NCO037834 (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/Forms/NPDES_WW-EDMR- Supplemental-Form (c.) 2°d-Species Toxicity Testing and Reporting. (i.) In addition to the quarterly toxicity tests required in Condition A.(3.) CHRONIC TOXICITY PERMIT LIMIT, 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 quarterly tests being conducted. (ii.) The 2°d 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 2°d species test shall coincide with the quarterly samples collected for A.(3.) CHRONIC TOXICITY PERMIT LIMIT; 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 samples 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@deq.nc.gov. (iv.) Results of the 2°d 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 8 of 17 DocuSign Envelope ID: FB9D71D6-625A-45D5-B5F6-78178EO3DDOC Permit NCO037834 A.(5.) POTENTIAL INSTREAM SAMPLING EXEMPTION [15A NCAC 02B .0500 et seq.] Per 15A NCAC 2B .0505(c)(4), stream sampling (as well as influent/effluent sampling) may be discontinued when flow conditions could result in injury or death of the person(s) collecting the samples. In such cases, on each day that sampling is discontinued, written justification shall be specified in the monitoring report for the month in which the event occurred. This provision shall be strictly construed and may not be utilized to avoid the requirements of this Section when performance of these requirements is attainable. When there is discontinuance pursuant to this provision, stream (as well as influent/effluent sampling) shall be resumed at the first opportunity after the risk period has ceased. A.(6.) MERCURY MINIMIZATION PLAN (MMP) [NCGS 143-215.1 (b)] The Permittee shall maintain and continue to implement the Mercury Minimization Plan (MMP) developed in the previous permit term. The MMP shall continue to be available for inspection on -site. 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.(7.) NUTRIENT REOPENER FOR HIGH ROCK LAKE` . A [NCGS 143-215.1 (b)] This permit may be reopened and modified to implement nutrient requirements in accordance with any future TMDL and/or nutrient management strategy for High Rock Lake. A. (8.) 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 13-12 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 9 of 17 DocuSign Envelope ID: FB9D71D6-625A-45D5-B5F6-78178EO3DDOC Permit NCO037834 A.(9.) PFAS MONITORING REQUIREMENT AND PRETREATMENT [NCGS 143-215.1(b)] (a.) In the absence of a final 40 CFR Part 136 method, effluent PFAS monitoring shall be conducted. The 3'd or more recent wastewater draft analytical method 1633 (see 40 CFR 122.21(e)(3)(ii) and 40 CFR 122.44(i)(1)(iv)(B)) shall be used and shall include all target analytes listed under Table 1 of the draft method until such time as the Permittee uses the Final HAS Method for wastewater. Effective 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, effluent PFAS monitoring shall be conducted using the approved EPA Final PFAS Method 1633. (b.) Effluent monitoring using the draft analytical method takes effect the first full calendar quarter following six (6) months after the effective date of the permit (Month xx, 2024) and will be at a quarterly frequency thereafter. Appendix A has been added to the permit to identify the current analytes listed under Table 1 of the 4te Draft Method 1633 Analysis of Per- and Polyfluoroalkyl Substances (PFAS) July 2023, in Aqueous Samples and the appropriate ICIS codes for use when reporting in the electronic Discharge Monitoring Reports (eDMRs). The method and list of analytes may also be found at: https://www.epa.gov/system/files/documents/2022- 12/3rd%20Draft%20Method%201633%20December%202022%2012-20-22 508.ndf HAS Monitoring using the Draft Method 1633 shall be reported quarterly using the Division - provided submittal form. Once HAS monitoring is conducted using the EPA Final HAS Method 1633, data shall be reported in the monthly eDMRs. Please note that specific considerations and protocols are required to avoid cross -contamination and minimize sample bias for PFAS. A current listing of laboratories accredited by the Perry Johnson Laboratory Accreditation, Inc. (PJLA), ANSI National Accreditation Board (ANAB), or the American Association for Laboratory Accreditation (A2LA) to perform EPA Draft Method 1633 can be found by contacting the individual associations. Please note that different labs are accredited for different matrices. NOTES - Sampling and Analytical: • Sampling shall be planned so that required holding times for analytical methods are met. • Using one of the analytical laboratories included above will allow consistency in analytical method and in anticipation of a final method. • "J" flag values shall be reported when the "J" flag value is associated with the method's upper bound. "J" flag values need not be reported when less than the method's Minimum Reporting Level (listed in Method 1633). • Laboratories approved for Aqueous matrix may be utilized. Please note that the lab used does not have to be in North Carolina. (c.) Pretreatment program activities: (i.) PFAS Monitoring Applicability: Industry categories known or suspected to discharge HAS from the EPA PFAS Strategic Roadmap include: organic chemicals, plastics & synthetic fibers (OCPSF); metal finishing; electroplating; electric and electronic components; landfills; pulp, paper & paperboard; leather tanning & finishing; plastics molding & forming; textile mills; paint formulating, and airports. This is not an exhaustive list and additional industries may also discharge PFAS. For example, Centralized Waste Treatment (CWT) facilities may receive Page 10 of 17 DocuSign Envelope ID: FB9D71D6-625A-45D5-B5F6-78178EO3DDOC Permit NCO037834 wastes from the aforementioned industries and should be considered for monitoring. There may also be categories of dischargers that do not meet the applicability criteria of any existing Effluent Limitation Guidelines (ELG); for instance, remediation sites, chemical manufacturing not covered by OCPSF, and military bases.' ' ELG categories of airport deicing, landfills, textile mills, and plastics molding and forming do not have categorical pretreatment standards, and therefore small -volume indirect dischargers in those categories would not ordinarily be considered Significant Industrial Users (S1Us) and may not be captured on an existing IU inventory. IUs under the Paint Formulating category are only subject to Pretreatment Standards for New Sources (PSNS), and existing sources may need to be inventoried. (ii.) The Permittee shall identify and locate each Significant Industrial User (SIU) in the approved pretreatment program in industry categories expected or suspected of PFAS discharges to the Archie Elledge WWTP; and begin sampling of and modify Industrial User Permits (IUPs) for each SIU identified as suspected of PFAS discharges to the Archie Elledge WWTP to ensure sampling begins within six months of the permit effective date, by Month xx, 2024. (iii.) Update Industrial Waste Survey (IWS) Inventory: POTWs must identify and locate all possible indirect dischargers that might be subject to the pretreatment program and identify the character and volume of pollutants contributed to the POTW by the indirect dischargers (see 40 CFR 403.8(f)(2)). As EPA regulations require, this information shall be provided to the Division (see 40 CFR 122.440) and 40 CFR 403.8(f)(6)) as part of the 2024 Pretreatment Annual Report (PAR). The IWS inventory shall be revised, as necessary, to include all indirect dischargers in industry categories expected or suspected of PFAS discharges.'- (see 15A NCAC 02H .0906(b)(2)). (iv.) The Penmittee shall begin sampling of and/or issue IUPs for each indirect discharger identified as suspected of PFAS discharges to the Pilot Creek WWTP to ensure sampling begins within six months of completion of the IWS. _ (v.) The Division has determined that all SIUs and indirect dischargers identified above analyze their discharge for PFAS at the same quarterly sampling frequency and with the same analytical method to ensure protection of human health and the environment due to the potential health hazards associated with PFAS. Collection and evaluation of this information will also assist the Department in developing sound policies with respect to HAS in the environment. (vi.) The Permittee shall ensure that IUPs within the Archie Elledge WWTP service area are modified or reissued, new IUPs are issued, and other Pretreatment Program mechanisms are completed to address PFAS discharges to POTWs. (vii.) In the absence of local limits, and based upon data as they become available, POTWs shall encourage Best Management Practices (BMPs), pollution prevention, product substitution, and good housekeeping practices to make meaningful reductions in PFAS introduced to POTWs. Such BMPs could be like those included in the EPA Office of Water, December 5, 2022, "Addressing PFAS Discharges in NPDES Permits and Through the Pretreatment Program and Monitoring Programs."A3. "Best Management Practices (BMPs) for discharges of PFAS, including product substitution, reduction, or elimination of PFAS, as detected by draft method 1633". (viii.) A summary of all actions taken by the Permittee and their industries and monitoring conducted by each indirect discharger identified as part of this Special Condition shall be provided as part of the PAR (see 15A NCAC 02H .0908(b)). Page 11 of 17 DocuSign Envelope ID: FB9D71D6-625A-45D5-B5F6-78178EO3DDOC Permit NCO037834 A.(10.) LAGOON CLOSURE / REHABILITATION AND GROUNDWATER MONITORING REQUIREMENTS [NCGS 143-215.1(b)] (a.) Within 180 days of the permit effective date, the Permittee shall submit a plan for closure and/or rehabilitation of the lagoons at the site to the Division for approval. (i.) The Permittee shall propose a closure plan and follow subsequent closure procedures outlined in a memorandum dated January 22, 2012 (See "Guidelines for the Closure of Permitted Wastewater Ponds and Lagoons"). (ii.) The plan shall include a groundwater monitoring plan with proposed parameters and monitoring frequencies. Groundwater monitoring shall continue until the lagoons have been closed or rehabilitated. (b.) At least 270 days prior to the expiration of this permit, the Permittee shall provide an updated sludge depth survey and a full composited sludge analysis of the parameters listed in the memorandum dated January 22, 2012 ("Guidelines for the Closure of Permitted Wastewater Ponds and Lagoons"). (c.) All documents required in this memorandum shall be submitted to: NCDEQ/Division of Water Resources NCDEQ/Division of Water Resources Non -Discharge Permitting wit Water Quality Regional Operations /WSRO 1617 Mail Service Center 450 W. Hanes Mill Road, Suite 300 Raleigh, NC 27699-1617 Winston-Salem, NC 27105-7407 NCDEQ/Division of Water Resources Water Quali ermitting Section 1617 Mail Sce Center Raleigh, NC 27699-1617,E A.(11.) ELECTRONIC REPORTING -DISCHARGE MONITORING REPORTS [NCGS 143-215.I(b)] Federal regulatio s require electronic submittal of all discharge monitoring reports (DMRs) and program reports. The fin DES 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. Page 12 of 17 DocuSign Envelope ID: FB9D71D6-625A-45D5-B5F6-78178E03DDOC Permit NC0037834 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://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. 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 olft 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 (C WA) 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(l)(9), the permittee must identify the initial recipient at the time of each electronic submission. The permittee should use the EPXs 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 EPXs NPDES Electronic Reporting Rule is found at: httt)s://www.federalrea ster.pov/documents/2015/10/22/2015-24954/national- pollutant-discharge-elimination-system-npdes-electronic-reporting-` Electronic submissions must start by the dates listed in the "Reporting Requirements" section above. Page 13 of 17 DocuSign Envelope ID: FB9D71 D6-625A-45D5-B5F6-78178EO3DDOC Permit NCO037834 3. How to Request a Waiver from Electronic Resorting 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 roved reporting waiver request is IV effective. Information on eDMR and the application for a temporary electronic reporting waiver are found on the following web page: http://deg.nc.gov/about/divisions/water-resources/edmr 4. Si¢natory Requirements [Supplements Section B. (11.) (b) and Supersedes Section B. (11.) (d)l All eDMRs submitted to the permit issuing authority shall be signed by a person described in Part 11, Section B. (I I.)(a) or by a duly authorized representative of that person as described in Part II, Section B. (I1.)(b). A person, and not a pqjkjjLn, 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://deg.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.)] 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 14 of 17 DocuSign Envelope ID: FB9D71D6-625A-45D5-B5F6-78178EO3DDOC Permit NCO037834 NCO037834 - Archie Elledge WWTP j L,Facility Latitude: 36'01'04- Sub -Basin: 03-07-04 tion Longitude: 80°18'64" uad#: C17SE Stream Class: C City of Winston-Salem Receivin�Stream: SalemCreekForsyth County Page 15 of 17 DocuSign Envelope ID: FB9D71D6-625A-45D5-B5F6-78178EO3DDOC Permit NCO037834 PFAS Target Analytes EPA Method 1633 (41h Draft, July 2023). largo knakic,Name Abbresiation \umber Parameter Code Perlluoroalk%l carboxN lie acids Perfluorobutanoic acid PFBA 375-22-4 51522 Perfluoropentanoic acid PFPeA 2706-90-3 51623 Perfluorohexanoic acid PFHxA 307-24-4 51624 Perfluoroheptanoic acid PFHpA 375-85-9 51625 Perfluorooctanoic acid PFOA 335-67-1 51521 Perfluorononanoic acid PFNA 375-95-1 51626 Perfluorodecanoic acid PFDA 335-76-2 51627 Perfluoroundecanoic acid PFUnA 2058-94-8 51628 Perfluorododecanoic acid PFDoA 307-55-1 51629 Perfluorotridecanoic acid PFTrDA 72629-94-8 51630 Perfluorotetradecanoic acid PFTeDA 376-06-7 51531 Perfluoroalkyl sulfonic acids Perfluorobutanesulfonic acid PFBS 375-73-5 52602 Perfluoropentanesulfonic acid PFPeS 2706-91-4 52610 Perfluorohexanesulfonic acid PFHxS 355-46-4 52605 Perfluoroheptanesulfonic acid PFHpS 375-92-8 52604 Perfluorooctanesulfonic acid PFOS 1763-23-1 52606 Perfluorononanesulfonic acid PFNS 68259-12-1 52611 Perfluorodecanesulfonic acid PFDS 335-77-3 52603 Perfluorododecanesulfonic acid PFDoS 79780-39-5 52632 Fluorotelomer sulfonic acids IH,1H,2H,2H-Perfluorohexane sulfonic acid 4:2FTS 757124-72-4 52607 1H,1H,2H,2H-Perfluorooctane sulfonic acid 6:2FTS 27619-97-2 52608 1H,1H,2H,2H-Pertluorodecane sulfonic acid 8:2FTS 39108-34-4 52609 Perfluorooctane sulfonamides Perfluorooctanesulfonamide PFOSA 754-91-6 51525 N-methyl perfluorooctanesulfonamide NMeFOSA 31506-32-8 52641 N-ethyl perfluorooctanesulfonamide NEtFOSA 4151-50-2 52642 Table continues on next page. Page 16 of 17 DocuSign Envelope ID: FB9D71D6-625A-45D5-B5F6-78178EO3DDOC Permit NCO037834 Table continued from Appendix A. PFAS Target Anal tes EPA Method 1633 (4`h Draft, July 2023). Target Analyte Name Abbre%iation CAS Number Parameter Code Perfluorooctane sulfonamidoacetic acids N-methyl perfluorooctanesulfonamidoacetic acid NMeFOSAA 2355-31-9 51644 N-ethyl perfluorooctanesulfonamidoacetic acid NEtFOSAA 2991-50-6 51643 Perfluorooctane sulfonamide ethanols N-methyl perfluorooctanesulfonamidoethanol NMeFOSE 24448-09-7 51642 N-ethyl perfluorooctanesulfonamidoethanol NetFOSE 1691-99-2 51641 Per- and Polyfluorother carboxylic acids Hexafluoropropylene oxide dimer acid HFPO-DA 13252-13-6 52612 4,8-Dioxa-3H-perfluorononanoic acid ADONA 919005-14-4 52636 Perfluoro-3-methoxypropanoic acid PFMPA 377-73-1 PF002 Perlfuoro-4-methoxybutanoic acid PFM13A 863090-89-5 PF006 Nonafluoro-3,6-dioxaheptanoic acid NFDHA 151772-58-6 52626 Ether sulfonic acids 9-Chlorohexadecafluoro-3-oxanonane-l-sulfonic acid 9CI-PF3ONS 756426-58-1 PF003 11-Chloroeicosafluoro-3-oxaundecane-l-sulfonic acid 11 Cl-PF3OUdS 763051-92-9 PF004 Perfluoro(2-ethoxyethane)sulfonic acid PFEESA 113507-82-7 52629 Fluorotelomer carboxylic acids 3-Perfluoropropyl propanoic acid 3:3FTCA 356-02-5 PF001 2H,2H,3H,3H-Perfluorooctanoic acid 5:3FTCA 91463749-3 PF007 3-Perfluoroheptyl propanoic acid 7:3FTCA 812-70-4 PFOOS Page 17 of 17