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Home My WebLink AboutNC0025321_Permit Issuance_20170126NPDES DOCUMENT SCANNIN` COVER SHEET NC0025321 Waynesville WWTP NPDES Permit: Document Type: (Permit Issuance Wasteload Allocation Authorization to Construct (AtC) Permit Modification Complete File - Historical Engineering Alternatives (EAA) Correspondence Owner Name Change Meeting Notes Instream Assessment (67b) Speculative Limits Environmental Assessment (EA) Document Date: January 26, 2017 Thies document Its printed on reusee paper - ig:zore any content on the reizerse aide ROY COOPER Governor Water Resources ENVIRONMENTAL QUALITY MICHAEL S. REGAN. Secretrnv S. JAY ZIMMERMAN Director January 26, 2017 David Foster Director of Public Services PO Box 100 Waynesville, NC 28786 Subject: Final NPDES Permit Renewal Permit No. NC0025321 Waynesville WWTP Haywood County Facility Class IV SIC 4952 Dear Mr. Foster: Division personnel have reviewed and approved your application for renewal of the subject permit. Accordingly, we are forwarding the attached NPDES permit. This permit is issued pursuant to the requirements of North Carolina General Statute 143-215.1 and the Memorandum of Agreement between North Carolina and the U.S. Environmental Protection Agency dated October 15, 2007 (or as subsequently amended). On December 9, 2016, a letter was received from Preston Gregg, Town Engineer for the Town of Waynesville. The letter requested that no changes from the previous permit (except for the eDMR) be implemented until plant upgrades can be assessed. The Division understands that upgrades at the plant are necessary and that implementing too many changes can be difficult. The NPDES permit is only reviewed once every five years and effluent limitations must be reviewed along with implementing any statutory and administrative revisions that have occurred during that period. As you recognized the eDMR requirement is required by Federal Regulations and must be implemented. In addition, the changes in the permit requiring a Mercury Minimization Plan and the need to test mercury using EPA test method 1631E are required as part of the Statewide Mercury TMDL adopted in 2012. Please note, as stated below in this letter, a sample MMP was developed through a stakeholder review process and has been placed on the Division website to help guide the permittees through this requirement. Furthermore, the requirement to monitor for cyanide is necessary because the reasonable potential analysis on the effluent at the plant showed that the predicted concentration was greater than 50% of the allowable discharge limitation. Therefore, monitoring is required to confirm that Water quality standards are not being exceeded. Since copper and zinc limitations and monitoring requirements have been removed from the permit this should not affect overall monitoring costs. Lastly, changes to Special Conditions A. (2.) and A.(3.) were made simply to clarify the requirements. State of North Carolina I Environmental Quality 1 Water Resources 1617 Mail service Center I Raleigh, North Carolina 27699-1617 919 707 9000 Page 2 of 3 The removal rate was changed to 85% because an evaluation of the average BOD5 and TSS influent and effluent data for the past two years showed that the treatment facility was able to consistently achieve it. However, if the Town can demonstrate the 85% removal rate cannot be met due to less concentrated influent wastewater or any other reason allowed under 40 CFR 133.103(d), the requirement can be reduced. As stated previously in the cover letter with the draft permit, the final permit includes the following changes from your current permit: • The requirement to begin 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.(5.)] For information on eDMR, registering for eDMR and obtaining an eDMR user account, please visit the following web page: http://portal.ncdenr.org/web/wq/adnun/bog/ipu/edmr. For information on EPA's proposed NPDES Electronic Reporting Rule, please visit the following web site: http://www2.epa.gov/compliance/proposed-npdes-electronic-reporting-rule. • A Mercury Minimization Plan (MMP) has been added to your NPDES permit. [See Special Condition A. (4.)] The permittee shall develop and implement a mercury minimisation plan during this permit term. The MMP shall be developed by August 28, 2017 (within 180 days of the NPDES Permit Effective Date), 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://portal.ncdenr.org/web/wq/swp/ps/npdes, under Model Mercury Minimization Plan). • A review of effluent BOD5 and TSS influent and effluent data shows the 30-day average percent removal is greater than 85%. Footnote #3 in section A.(1) has been revised from 75% to 85% to reflect this improvement. In accordance with 40 CFR 133.103(d), The Regional Administrator or, if appropriate, State Director is authorized to substitute either a lower percent removal requirement or a mass loading limit for the percent removal requirements set forth in §§ 133.102(a)(3), 133.102(a)(4)(iii), 133.102(b)(3), 102.105(a)(3), 133.105(b)(3) and 133.105(e)(1)(iii) provided that the permittee satisfactorily demonstrates that: (1) The treatment works is consistently meeting, or will consistently meet, its permit effluent concentration limits but its percent removal requirements cannot be met due to less concentrated influent wastewater, (2) to meet the percent removal requirements, the treatment works would have to achieve significantly more stringent limitations than would otherwise be required by the concentration based standards, and (3) the less concentrated influent wastewater is not the result of excessive I/I. The determination of whether the less concentrated wastewater is the result of excessive I/I will use the definition of excessive I/I in 40 CFR 35.2005(b)(16) plus the additional criterion that inflow is nonexcessive if the total flow to the POTW (i.e., wastewater plus inflow plus infiltration) is less than 275 gallons per capita per day. As with previous permits, the Town will need to satisfactorily demonstrate that a lower percent removal requirement is still appropriate in order to maintain the 75% removal requirement in the permit. • Effluent sampling data for copper and zinc showed concentrations were all below detection limits during the period of Jan. 2012 through Aug. 2016. No limitations and monitoring for copper and zinc Page 3 of 3 are required. The copper and zinc limitations and monitoring requirements have been removed from the permit renewal. • Monitoring requirements for cyanide have been added at a monitoring frequency of quarterly. • Some of the wording has changed in Special Condition A. (2.), Chronic Toxicity Permit Limit, please review each paragraph carefully. • Special Condition A.(3.) has been modified to include the specific three years in which the Effluent Pollutant Scans shall be performed (2018, 2019, and 2020). In addition, at the end of the Special Condition, 2nd species Toxicity Testing Requirements for municipal permit renewals per Federal Regulations [40 CFR 122.21(j)(5)] have been added. • Please note, that low level effluent mercury data is required for compliance review, therefore, the Permittee will be required to monitor mercury as part of its effluent pollutants scans, using EPA method 1631 E. If any parts, measurement frequencies or sampling requirements contained in this permit are unacceptable to you, you have the right to an adjudicatory hearing upon written request within thirty (30) days following receipt of this letter. This request must be in the form of a written petition, conforming to Chapter 150B of the North Carolina General Statutes, and filed with the Office of Administrative Hearings (6714 Mail Service Center, Raleigh, North Carolina 27699-6714). Unless such demand is made, this decision shall be final and binding. Please note that this permit is not transferable except after notice to the Division. The Division may require modification or revocation and reissuance of the permit. This permit does not affect the legal requirements to obtain other permits which may be required by the Division of Water Resources or any other Federal, State, or Local governmental permits that may be required. If you have questions concerning the draft permit for your facility, please contact Julie Grzyb by email at julie.grzyb@ncdenr.gov or call at (919) 807-6389. Sincerely ay Zimmerman, P.G. hector, Division of Water Resources, NCDEQ Hardcopy: NPDES Files Central Files DWR/Raleigh Regional Office/Water Quality e-copy: APA Region IV / sheville Regional Office / DWR — Water Quality Regional Operations Section ygusan Meadows, Aquatic Toxicity Branch Maureen Kinney, Wastewater Operator Certification & Training Permit No. NC0025321 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 Town of Waynesville is hereby authorized to discharge wastewater from a facility located at the Waynesville Wastewater Treatment Plant 566 Walnut Trail Waynesville Haywood County to receiving waters designated as the Pigeon River in the French Broad River Basin in accordance with effluent limitations, monitoring requirements, and other conditions set forth in Parts I, II, III, and IV hereof. The permit shall become effective March 1, 2017. This permit and the authorization to discharge shall expire at midnight on January 31, 2021 Signed this day January 26, 2017. f K S + - y Zimme ,6 : 1 sion of Water Resources By Authority of the Environmental Management Commission Permit No. NC0025321 • SUPPLEMENT TO PERMIT COVER SHEET All previous NPDES Permits issued to this facility, whether for operation or discharge are hereby revoked, and as of this issuance, any previously issued permit bearing this number is no longer effective. Therefore, the exclusive authority to operate and discharge from this facility arises under the permit conditions, requirements, terms, and provisions included herein The Town of Waynesville is hereby authorized to: 1. Continue to operate an existing 6.0 MGD wastewater treatment facility consisting of; • bar screen • aerated grit chamber • dual primary clarifiers • primary lift station ■ four aeration basins with coarse air diffusion • two secondary clarifiers with return sludge • chlorine contact basin ■ two chlorinators ■ dechlorination equipment • instrumented flow measurement • standby power • a primary sludge gravity thickener • a secondary sludge gravity thickener • a gas mixed floating cover anaerobic digester • belt filter press and • sludge stabilization equipment. This wastewater treatment facility is located at the Waynesville Wastewater Treatment Plant (566 Walnut Trail, Waynesville) in Haywood County. 2. Discharge wastewater from said treatment works at the location specified on the attached map into the Pigeon River, which are classified Class C waters in the French Broad . River Basin. Page 2 of 9 Permit No. NC0025321 PART I. A (1). EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS [15A NCAC 02B .0400 et seq., 02B .0500 et seq.] During the period beginning on the effective date of the permit and lasting until expiration, the permittee is authorized to discharge from outfall(s) serial number 001. Such discharges shall be limited and monitored 1 by the Permittee as specified below: EFFLUENT CHARACTERISTICS LIMITS MONITORING REQUIREMENTS Monthly Average Weekly Average Daily Maximum Measurement Frequency Sample Type Sample I.ocation2 Flow 6.0 MGD Continuous Recording I or E BOD, 5-day, 20°C3 30.0 mg/L 45.0 mg/L Daily Composite E,I TSS3 30.0 mg/L 45.0 mg/L Daily Composite E,I NH3-N (April 1 - October 31) 9.0 mg/L 27.0 mg/L Daily Composite E NH3-N (November 1 - March 31) 21.0 mg/L 35.0 mg/L Daily Composite E Dissolved Oxygen Variable2 Grab U,D Dissolved Oxygen4 Daily Grab E Fecal Coliform (geometric mean) 200/100 mL 400/100 mL Daily Grab E Temperature Variable2 Grab U,D Temperature Daily Grab E Total Residual Chlorine5 28 ug/L Daily Grab E Total Nitrogen Quarterly Composite E Total Phosphorus Quarterly Composite E Chronic Toxicity6 Quarterly Composite E Cyanide? Quarterly Grab E pH8 Daily Grab E Mercury Minimization Plan9 Notes: 1. The permittee shall submit Discharge Monitoring Reports electronically using NC DWR's eDMR application system. See Special Conditions A. (5). 2. Sample locations: E - Effluent, I - Influent, U - Upstream at River Mile 55.5, D - Downstream at River Mile 53.5 Instream monitoring shall be grab samples taken 3/wk (Jun -Sep) and 1/wk (Oct -May). 3. The monthly average effluent BODs and Total Suspended Solids concentrations shall not exceed 15% of the respective influent value (85% removal). 4. The daily average dissolved oxygen effluent concentration shall not be less than 6.0 mg/L. 5. Limitation applies only if chlorine is added for disinfection. The facility shall report all effluent TRC values reported by a NC certified laboratory including field certified. However, effluent values below 50 ug/L will be treated as zero for compliance purposes. 6. Chronic Toxicity (Ceriodaphnia), P/F, 9%; February, May, August, and November; See Part A. (2). 7. The Division shall consider all cyanide values reported below 10 µg/L to be "zero" for compliance purposes. However, Discharge Monitoring Reports (DMRs) shall record all values reported by a North Carolina -certified laboratory (even if these values fall below 10 µg/L). 8. The pH shall not be less than 6.0 standard units nor greater than 9.0 standard units. 9. A Mercury Minimization Plan (MMP) is now required. See Special Condition A. (4). There shall be no discharge of floating solids or visible foam in other than trace amounts. Page 3 of 9 Permit No. NC0025321 A. (2) CHRONIC TOXICITY PERMIT LIMIT (Quarterly) [15A NCAC 02B .0200 et seq.] CHRONIC TOXICITY PERMIT LIMIT (QUARTERLY) The effluent discharge shall at no time exhibit observable inhibition of reproduction or significant mortality to Ceriodaphnia dubia at an effluent concentration of 9%. 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 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 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 4 of 9 Permit No. NC0025321 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. A. (3) 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: 2018, 2019, and 2020. 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) Chbrfne (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 (Method 1631E) Nickel Selenium Silver Thallium Zinc Cyanide Total phenolic compounds Volable oroanic compounds: Acrolein Acrylonitrfle Benzene Bromoform Carbon tetrachloride Chbrobenzene Chtorodibromomethane Chbroethane 2-chloroethyi vinyl ether Chloroform Dichlorobromomethane 1,1-dichtoroethane C0610 50060 00300 00620 00615 00625 00556 C0665 70295 00900 01097 01002 01012 01027 01034 01051 COMER 01067 01147 01077 01059 01092 00720 32730 34210 34215 34030 32104 32102 34301 34306 85811 34576 32106 32101 34496 1,2-dichloroethane Trans-1,2-dichbroethylene 1,1-dichbroethyiene 1,2-dichbropropane 1,3-dichbropropylene Ethylbenzene Methyl bromide Methyl chloride Methylene chloride 1,1,2,2-tetrachbroethane Tetrachloroethylene Toluene 1,1,1-trichioroethane 1,1,2-trichloroethane Trfchloroethylene Vinyl chtoride Acid -extractable compounds: P-c Moro-m-creso 2-chlorophenol 2,4-dichbrophenol 2,4-dimethyiphenol 4,6-dinitro-o-cresol 2,4-dinitrophenol 2-nitrophenol 4-nitrophenol Pentachlorophenol Phenol 2,4,6-trichtorophenol Base -neutral compounds: Acenaphthene Acenaphthylene Anthracene Benzidine Benzo(a)anthracene Benzo(a)pyrene 3,4 benzofluoranthene Benzo(ghi)perylene Benzo(k)fluoranthene 32103 34546 34501 34541 77163 34371 34413 34418 34423 81549 34475 34010 34506 34511 39180 39175 34452 34586 34601 34606 34657 34616 34591 34646 39032 34694 34621 34205 34200 CO220 39120 34526 34247 34230 34521 34242 Bis (2-chbroethoxy) methane Bis (2-chbroethyl) ether Bis (2-chbroisopropyl) 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-dichbrobenzene 1,3-dichbrobenzene 1,4-dichbrobenzene 3,3-dichbrobenzidine Diethyl phthalate Dimethyl phthalate 2,4-dinitrotoluene 2,6-dinitrotoluene 1,2-diphenythydrazine Fluoranthene Fluorene Hexachlorobenzene Hexachbrobutadiene HexachlorocycIo pentadiene Hexachloroethane Indeno(1,2,3-cd)pyrene Isophorone Naphthalene Nitrobenzene N-nitrosodi-n-propylamine N-nitrosodimethylamine N-nitrosodiphenylamtne Phenanthrene Pyrene 1,2,4-trichlorobenzene 34278 34273 34283 39100 34636 34292 34581 34641 34320 39110 34596 34556 34536 34566 34571 34631 34336 34341 34611 C0626 34346 C0376 34381 C0700 39702 34386 34396 34403 34408 34696 34447 34428 34438 34433 34461 34469 34551 Page 5 of 9 Permit No. NC0025321 Reporting. Test results shall be reported electronically via eDMR or on DWR Form - DMR-PPA- 1 (or on a form approved by the Director) by December 31st 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 122.216)(5) and EPA Municipal Application Form 2A. The US EPA requires four (4) toxicity tests for a test organism other than the test species currently required in this permit. The second 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 year period prior to the application. The second species tests must be multiple concentration (5 concentrations plus the control). These tests shall be performed for acute or chronic toxicity, whichever is specified in this permit. POTWs performing NPDES chronic Ceriodaphnia testing should perform chronic Fathead minnow testing. POTWs performing NPDES acute Fathead Minnow testing should perform acute Ceriodaphnia testing. POTWs performing NPDES chronic Mysid shrimp testing should perform chronic Silverside Minnow testing. The second 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. A. (4) MERCURY MINIMIZATION PLAN (MMP) [G.S. 143-215.1 (b)] The permittee shall develop and implement a mercury minimization plan during this permit term. The MMP shall be developed by August 28, 2017 (within 180 days of the NPDES Permit Effective Date), 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://portal.ncdenr.org/web/wci/swp/ps/npdes, 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 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. Page 6 of 9 Permit No. NC0025321 A. (5) 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.) (all The permittee shall report discharge monitoring data electronically using the NC DWR's Electronic Discharge Monitoring Report (eDMR) internet application. Monitoring results obtained during the previous month(s) shall be summarized for each month and submitted electronically using eDMR. The eDMR system allows permitted facilities to enter monitoring data and submit DMRs electronically using the internet. Until such time that the state's eDMR application is compliant with EPA's Cross -Media Electronic Reporting Regulation (CROMERR), permittees will be required to submit all discharge monitoring data to the state electronically using eDMR and will be required to complete the eDMR submission by printing, signing, and submitting one signed original and a copy of the computer printed eDMR 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 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 mailing address above. 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, 2020, 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) . Page 7 of 9 Permit No. NC0025321 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: http: / /www2.epa.gov/compliance/final-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: http: / / deg.nc.gov/ about/ divisions /water-resources/edmr 4. Signatory Requirements 'Supplements Section B. (11.) lb) and Supersedes Section B. a11.) (d11 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: Page 8 of 9 Permit No. NC0025321 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 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. (6.11 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 9 of 9 centery ' ilM17 A 144 a11'IRi:�lfn 11bit ttl.usk2 2555 • • .13MN ELEN 2562C 2$� 1 • NC0025321 - Town of Waynesville WWTP Latitude: Longitude: Quad #: Stream Class: Receiving Stream: Permitted Flow: 35°33'02" 82°56'58" E7SW/Clyde, NC C Pigeon River 6.0 MGD Sub-Basin/HUC: 04-03-05/06010105 Coun : Haywood Map not to scale Facility Location Town of Waynesville NC0025321 Waynesville WWTP CITIZE\TIMES Public Notice North Carolina Environmental Management Commission/NPDES Unit 1617 Mall Service Center Raleigh, NC 27699-1617 Notice of Intent to Issue a NPDES Wastewater Permit The North Carolina Environmental Man- aggement Commission propgossess to issue a heDpersoswastewateribelow Written com- ments regarding the proposed permit will be accepted until 30 days after the publish date of this notice. The Director of the NC Division of Water Resources (DWR) may hold a public hearing should there be a significant degree of public interest. Please mail comments and/or information requests to DWR at the above address. In- terested persons may visit the DWR at 512 N. Salisbury Street, Raleigh, NC to review Information on file. Additional informa- tion on NPDES permits and this notice may be found on our website: http://deq.nc.gov/abouVdivisions/water-re $0urce sources/water-resources- permits/wastewater-brans h/n pdes- wastewater/public-notices, or by calling (919) 607.6304. Town of Waynesville requested renewal of permit NC0025321 for Waynesville WWTP in Haywood County; this facility discharge is treated municipal wastewater to Pigeon River, French Broad River Basin. November 20, 2016 (S 104.13) 14 O. HENRY AVE. PARTOFTHE USATODAY NETWORK AFFIDAVIT OF PUBLICATION BUNCOMBE COUNTY SS. NORTH CAROLINA Before the undersigned,a Notary Public of said County and State, duly commissioned, qualified and authorized by law to administer oaths, personally appeared Kelly Loveland, who, being first duly sworn, deposes and says: that she is the Legal Clerk of The Asheville Citizen -Times, engaged in publication of a newspaper known as The Asheville Cltizen-Times, published, issued, and entered as first class mail in the City of Asheville, in said County and State; that she is authorized to make this affidavit and sworn statement; that the notice or other legal advertisement, a true copy of which is attached here to, was published in The Asheville Citizen -Times on the following date(s) 11/20/16. And that the said newspaper in which said notice, paper, document or legal advertisement was published was, at the time of each and every publication, a newspaper meeting all of the requirements and qualifications of Section 1-597 of the General Statues of North Carolina and was a qualified newspaper within the meaning of Section 1-597 of the General Statutes of North Carolina. (Signatur king affidavit) Signed this 21th of November 2016, Sworn to and subscribed before the 21th of November 2016 otary Public My Commission expires the 5th day of October, 2018 (828) 232-5830 I (828) 253-5092 FAX P.O. BOX 2090 I ASHEVILLE, NC 28802 I (800) 800-4204 ``\\>,��, O Ye li/1/4/i �Q Notary Public Buncombe �-< County = My Comm. Exp. ` :,,,tip IL:. — I S ��-\,; ,,,,, ! . c a i i ('i'ill•' �' 'lrilliNitU Permit No. NC0025321 Fact Sheet Des 0.0 p 1-- NPDES Permit No. NC0025321 w f#(d-•Jktek- Permit Writer/Email Contact: Claire Welling, claire.welling®ncdenr.gov Date: November 16, 2016 Division/Branch: NC Division of Water Resources/NPDES Complex Permitting Fact Sheet Template: Version 08Sept2016 Permitting Action: • Renewal ❑ Renewal with Expansion 0 New Discharge O Modification (Fact Sheet should be tailored to mod request) Note: A complete application should include the following: • For New Dischargers, EPA Form 2A or 2D requirements, Engineering Alternatives Analysis, Fee • For Existing Dischargers (POTW), EPA Form 2A, 3 effluent pollutant scans, 4 2nd species WET tests. • For Existing Dischargers (Non-POTW), EPA Form 2C with correct analytical requirements based on industry category. Complete applicable sections below. If not applicable, enter NA. 1. Basic Facility Information Facility Information Applicant/Facility Name: Town of Waynesville/Waynesville WWTP Applicant Address: PO Box 100 Waynesville, NC 28786 Facility Address: 566 Walnut Trail Waynesville, NC 28785 Permitted Flow: 6.0 MGD Facility Type/Waste: MAJOR Municipal Facility Class: Class 4 Treatment Units: Bar Screen, Primary Clarification, Aeration basins, Clarification, Chlorination, Anaerobic Digestion Pretreatment Program (Y/N) No County: Haywood Region Asheville Briefly describe the proposed permitting action and facility background: The Town of Waynesville has applied for NPDES permit renewal, and submitted a renewal application dated June 1, 2015. This facility serves a population of 164,000 residents. Page 1 of 13 Permit No. NC0025321 2. Receiving Waterbodv Information: Receiving Waterbody Information Outfalls/Receiving Stream(s): Outfall 001- Pigeon River Stream Segment: 5-(7)b Stream Classification: C Drainage Area (mi2): 236.4 Summer 7Q10 (cfs) 95 Winter 7Q10 (cfs): 111 Average Flow (cfs): 518 IWC (% effluent): 9 303(d) listed/parameter: Yes- this segment is listed as impaired for Benthos on the draft 2016 303(d) list and the final2014 303(d) list. Subject to TMDL/parameter: No Subbasin/HUC: 04-03-05; 06010105 USGS Topo Quad: E7SW 3. Effluent Data Summary Effluent data is summarized below for the period January 2012 through August 2016. Table. Effluent Data Summary Parameter Units Average Max Min Existing Limits Flow MGD 3.36 6.12 2.04 6.0 BOD summer mg/1 8.04 35.0 1.0 30 MA/ 45 WA BOD winter mg/1 9.16 38.0 2.0 NH3N summer mg/1 2.01 17.6 0.3 9 MA/27 WA NH3N winter mg/1 1.85 15 0.3 21 MA/35 WA TSS mg/1 9.16 83.0 4.0 30 MA/ 45 WA pH SU 6.9 7.6 6.0 >_6.0<9.0 Temperature °C 17.3 26.9 10 DO mg/1 8.2 11.6 6 > 6.0 TN mg/1 7.92 11.60 4.50 TP mg/1 1.44 3.70 0.44 Page 2 of 13 .v Permit No. NC0025321 200 MA (400 Fecal Coliform #/100 ml 118.2 5900 1 WA)/100mL 4. Instream Data Summary Instream monitoring may be required in certain situations, for example: 1) to verify model predictions when model results for instream DO are within 1 mg/1 of instream standard at full permitted flow; 2) to verify model predictions for outfall diffuser; 3) to provide data for future TMDL; 4) based on other instream concerns. Instream monitoring may be conducted by the Permittee, and there are also Monitoring Coalitions established in several basins that conduct instream sampling for the Permittee (in which case instream monitoring is waived in the permit as long as coalition membership is maintained). If applicable, summarize any instream data and what instream monitoring will be proposed for this permit action: The current permit requires instream monitoring for dissolved oxygen and temperature. Review of upstream and downstream data between June 1, 2016 and August 31, 2016 and effluent data from the past five years indicates that the dissolved oxygen water quality standard of 5.0 mg/1 was maintained, and there were no apparent differences between upstream and effluent stations. The upstream and downstream temperatures between June 1, 2016 and August 31, 2016 remained below 29°C and no significant temperature change occurred between upstream and downstream. The effluent temperature data from the past 5 years also reported no temperatures over 29°C. This draft permit maintains the same instream monitoring requirements. Is this facility a member of a Monitoring Coalition with waived instream monitoring (Y/N): NO Name of Monitoring Coalition: NA 5. Compliance Summary Summarize the compliance record with permit effluent limits (past 5 years): The facility reported 1 fecal coliform violation in 2016. Summarize the compliance record with aquatic toxicity test limits and any second species test results (past 5 years): The facility passed 20 of 20 quarterly chronic toxicity tests, as well as all 4 second species chronic toxicity tests. Summarize the results from the most recent compliance inspection: The last facility inspection conducted in 2016 reported that the facility was well maintained and operated. 6. Water Quality -Based Effluent Limitations (WQBELs) Dilution and Mixing Zones In accordance with 15A NCAC 2B.0206, the following streamflows are used for dilution considerations for development of WQBELs: 1 Q 10 streamflow (acute Aquatic Life); 7Q10 streamflow (chronic Aquatic Life; non -carcinogen HH); 30Q2 streamflow (aesthetics); annual average flow (carcinogen, HH). If applicable, describe any other dilution factors considered (e.g., based on CORMIX model results): NA If applicable, describe any mixing zones established in accordance with 15A NCAC 2B.0204(b): NA Page 3 of 13 Permit No. NC0025321 Oxygen -Consuming Waste Limitations Limitations for oxygen -consuming waste (e.g., BOD) are generally based on water quality modeling to ensure protection of the instream dissolved oxygen (DO) water quality standard. Secondary TBEL limits (e.g., BOD= 30 mg/1 for Municipals) may be appropriate if deemed more stringent based on dilution and model results. If pertnit limits are more stringent than TBELs, describe how limits were developed: NA Ammonia and Total Residual Chlorine Limitations Limitations for ammonia are based on protection of aquatic life utilizing an ammonia chronic criterion of 1.0 mg/1(summer) and 1.8 mg/1 (winter). Acute ammonia limits are derived from chronic criteria, utilizing a multiplication factor of 3 for Municipals and a multiplication factor of 5 for Non -Municipals. Limitations for Total Residual Chlorine (TRC) are based on the NC water quality standard for protection of aquatic life (17 ug/1) and capped at 28 ug/1 (acute impacts). Due to analytical issues, all TRC values reported below 50 ug/1 are considered compliant with their permit limit. Describe any proposed changes to ammonia and/or TRC limits for this permit renewal: There are no proposed changes. Reasonable Potential Analysis (RPA) for Toxicants If applicable, conduct RPA analysis and complete information below. The need for toxicant limits is based upon a demonstration of reasonable potential to exceed water quality standards, a statistical evaluation that is conducted during every permit renewal utilizing the most recent effluent data for each outfall. The RPA is conducted in accordance with 40 CFR 122.44 (d) (i). The NC RPA procedure utilizes the following: 1) 95% Confidence Level/95% Probability; 2) assumption of zero background; 3) use of %2 detection limit for "less than" values; and 4) streamflows used for dilution consideration based on 15A NCAC 2B.0206. Effective April 6, 2016, NC began implementation of dissolved metals criteria in the RPA process in accordance with guidance titled NPDES Implementation of Instream Dissolved Metals Standards, dated June 10, 2016. A reasonable potential analysis was conducted on effluent toxicant data collected between January 2012 and August 2016. Pollutants of concern included toxicants with positive detections and associated water quality standards/criteria. Based on this analysis, the following permitting actions are proposed for this permit: • Effluent Limit with Monitoring. The following parameters will receive a water quality -based effluent limit (WQBEL) since they demonstrated a reasonable potential to exceed applicable water quality standards/criteria: N/A • Monitoring Only. The following parameters will receive a monitor -only requirement since they did not demonstrate reasonable potential to exceed applicable water quality standards/criteria, but the maximum predicted concentration was >50% of the allowable concentration: Cyanide • No Limit or Monitoring: The following parameters will not receive a limit or monitoring, since they did not demonstrate reasonable potential to exceed applicable water quality standards/criteria and the maximum predicted concentration was <50% of the allowable concentration: Arsenic, Beryllium, Cadmium, Chlorides, Chlorinated Phenolic Compounds, Total Phenolic Compounds, Chromium, Copper, Fluoride, Lead, Mercury, Molybdenum, Nickel, Selenium, Silver, Zinc • Summary of new limits added based on RPA: N/A • Summary of existing limits deleted based on RPA: N/A Page 4 of 13 Permit No. NC0025321 If applicable, attach a spreadsheet of the RPA results as well as a copy of the Dissolved Metals Implementation Fact Sheet for freshwater/saltwater to this Fact Sheet. Toxicity Testing Limitations Permit limits and monitoring requirements for Whole Effluent Toxicity (WET) have been established in accordance with Division guidance (per WET Memo, 8/2/1999). Per WET guidance, all NPDES permits issued to Major facilities or any facility discharging "complex" wastewater (contains anything other than domestic waste) will contain appropriate WET limits and monitoring requirements, with several exceptions. The State has received prior EPA approval to use an Alternative WET Test Procedure in NPDES permits, using single concentration screening tests, with multiple dilution follow-up upon a test failure. Describe proposed toxicity test requirement: This is a Major POTW, and a chronic WET limit at 9% effluent will continue on a quarterly frequency. Mercury Statewide TMDL Evaluation There is a statewide TMDL for mercury approved by EPA in 2012. The TMDL target was to comply with EPA's mercury fish tissue criteria (0.3 mg/kg) for human health protection. The TMDL established a wasteload allocation for point sources of 37 kg/year (81 lb/year), and is applicable to municipals and industrial facilities with known mercury discharges. Given the small contribution of mercury from point sources (-2% of total load), the TMDL emphasizes mercury minimization plans (MMPs) for point source control. Municipal facilities > 2 MGD and discharging quantifiable levels of mercury (>1 ng/1) will receive an MMP requirement. Industrials are evaluated on a case -by -case basis, depending if mercury is a pollutant of concern. Effluent limits may also be added if annual average effluent concentrations exceed the WQBEL value (based on the NC WQS of 12 ng/1) and/or if any individual value exceeds a TBEL value of 47 ng/1. Table. Mercury Effluent Data Summary 2012 2013 2014 2015 2016 # of Samples 3 4 3 4 2 Annual Average Conc. ng/L 5.5 11.9 12.0 8.3 8.3 Maximum Conc., ng/L 6.7 27.0 22.4 16.4 8.94 TBEL, ng/L 47 WQBEL, ng/L 134.E Describe proposed permit actions based on mercury evaluation: Since no annual average mercury concentration exceeded the WQBEL, and no individual mercury sample exceeded the TBEL, no mercury limit is required. However, since the facility is >2 MGD and reported quantifiable levels of mercury (> 1 ng/1), a mercury minimization plan (MMP) has been added to the permit. Other TMDL/Nutrient Management Strategy Considerations If applicable, describe any other TMDLs/Nutrient Management Strategies and their implementation within this permit: NA Other WOBEL Considerations If applicable, describe any other parameters of concern evaluated for WQBELs: NA Page 5 of 13 Permit No. NC0025321 If applicable, describe any compliance schedules proposed for this permit renewal in accordance with 15A NCAC 2H. 0107(c)(2)(B), 40CFR 122.47, and EPA May 2007 Memo: NA If applicable, describe any water quality standards variances proposed in accordance with NCGS 143- 215.3(e) and 15A NCAC 2B. 0226 for this permit renewal: NA 7. Technology -Based Effluent Limitations (TBELs) Municipals (if not applicable, delete and skip to Industrials) Are concentration limits in the permit at least as stringent as secondary treatment requirements (30 mg/I BOOS/TSS for Monthly Average, and 45 mg/! for BOD5/TSS for Weekly Average). YES If NO, provide a justification for alternative limitations (e.g., waste stabilization pond). NA Are 85% removal requirements for BODS/TSS included in the permit? Yes, the required removal rate for the permit renewal will be increased to 85%. The previous permit issued in 2011 had a removal requirement of 75% in accordance with 40 CFR §133.103(d), as low influent BOD levels made it difficult to achieve 85% removal. Monthly average BOD and TSS removal rates from January 2015 to August 2016 are all >85% and the facility has not demonstrated the need for a reduced removal rate in the renewal application (BOD and TSS removal summary table attached). As with previous permits, the Town will need to satisfactorily demonstrate that a lower percent removal requirement is appropriate in order to maintain the 75% removal requirement in the permit. !f NO, provide a justification (e.g., waste stabilization pond). NA If any limits are based on best professional judgement (BPJ), describe development: NA Document any TBELs that are more stringent than WQBELs: NA Document any TBELs that are less stringent than previous permit: NA 8. Antidegradation Review (New/Expanding Discharge): The objective of an antidegradation review is to ensure that a new or increased pollutant loading will not degrade water quality. Permitting actions for new or expanding discharges require an antidegradation review in accordance with 15A NCAC 2B.0201. Each applicant for a new/expanding NPDES permit must document an effort to consider non -discharge alternatives per 15A NCAC 2H.0105( c)(2). In all cases, existing instream water uses and the level of water quality necessary to protect the existing use is maintained and protected. If applicable, describe the results of the•antidegradation review, including the Engineering Alternatives Analysis (EAA) and any water quality modeling results: NA 9. Antibacksliding Review: Sections 402(o)(2) and 303(d)(4) of the CWA and federal regulations at 40 CFR 122.44(1) prohibit backsliding of effluent limitations in NPDES permits. These provisions require effluent limitations in a reissued permit to be as stringent as those in the previous permit, with some exceptions where limitations Page 6 of 13 Permit No. NC0025321 may be relaxed (e.g., based on new information, increases in production may warrant less stringent TBEL limits, or WQBELs may be less stringent based on updated RPA or dilution). Are any effluent limitations less stringent than previous permit (YES/NO): NO If YES, confirm that antibacksliding provisions are not violated: NA 10. Monitoring Requirements Monitoring frequencies for NPDES permitting are established in accordance with the following regulations and guidance: 1) State Regulation for Surface Water Monitoring, 15A NCAC 2B.0500; 2) NPDES Guidance, Monitoring Frequency for Toxic Substances (7/15/2010 Memo); 3) NPDES Guidance, Reduced Monitoring Frequencies for Facilities with Superior Compliance (10/22/2012 Memo); 4) Best Professional Judgement (BPJ). Per US EPA (Interim Guidance, 1996), monitoring requirements are not considered effluent limitations under Section 402(o) of the Clean Water Act, and therefore anti - backsliding prohibitions would not be triggered by reductions in monitoring frequencies. 11. Electronic Reporting Requirements The US EPA NPDES Electronic Reporting Rule was finalized on December 21, 2015. Effective December 21, 2016, NPDES regulated facilities are required to submit Discharge Monitoring Reports (DMRs) electronically. Effective December 21, 2020, NPDES regulated facilities will be required to submit additional NPDES reports electronically. This permit contains the requirements for electronic reporting, consistent with Federal requirements. 12.Summary of Proposed Permitting Actions: Table. Current Permit Conditions and Proposed Changes Parameter Current Permit Proposed Change Basis for Condition/Change Flow MA 6.0 MGD No change 15A NCAC 2B .0505 BOD5 MA 30 mg/1 WA 45 mg/1 No change 15A NCAC 2B .0400 NH3-N Summer: MA 9 mg/1 WA 27 mg/1 Winter: MA 21 mg/1 WA 35 mg/1 No change Based on protection of EPA WQ criteria. 15A NCAC 2B.0200 TSS MA 30 mg/1 WA 45 mg/1 No change Secondary treatment standards/40 CFR 133 and 15A NCAC 2B .0400 Fecal coliform MA 200 /100m1 WA 400 /100m1 No change State WQ standard, 15A NCAC 2B .0200 DO >6 mg/1 No change State WQ standard, 15A NCAC 2B .0200 Page 7 of 13 Permit No. NC0025321 • pH 6 — 9 SU No change State WQ standard, 15A NCAC 2B .0200 Total Nitrogen Monitor Only No change 15A NCAC 2B.0500 Total Phosphorus Monitor Only No change 15A NCAC 2B.0500. Toxicity Test Chronic limit, 9% effluent No change No toxics in toxic amounts. 15A NCAC 2B.0200 and 15A NCAC 2B.0500 Cyanide Quarterly Monitoring No change Reasonable Potential showed max predicted concentration >50% of the allowable concentration Total Copper Quarterly Monitoring Remove monitoring No reasonable potential to exceed applicable WQS Total Zinc Quarterly Monitoring Remove monitoring No reasonable potential to exceed applicable WQS Effluent Pollutant Scan Annual Reduce to three times per permit cycle [G.S. 143-215.1(b)] Mercury Minimization Plan (MMP) No requirement Add MMP Special Condition Consistent with 2012 Statewide Mercury TMDL Implementation. [G.S. 143-215.1 (b)] Electronic Reporting No requirement Add Electronic Reporting Special Condition In accordance with EPA Electronic Reporting Rule 2015. [G.S. 143- 215.1(b)] MGD — Million gallons per day, MA - Monthly Average, WA — Weekly Average, DM — Daily Max 13. Fact Sheet Addendum (if applicable): Were there any changes made since the Draft Permit was public noticed (Yes/No): NO If Yes, list changes and their basis below: On December 9, 2016, a letter was received from Preston Gregg, Town Engineer for the Town of Waynesville. The letter requested that no changes from the previous permit (except for the eDMR) be implemented until plant upgrades can be assessed. No changes were made to the draft permit. 14. Fact Sheet Attachments (if applicable): • RPA Spreadsheet Summary • Dissolved Metals Implementation/Freshwater or Saltwater Permit Writer: Claire Welling Date: 1/26/2017 Other Agency Comments: Page 8 of 13 Permit No. NC0025321 NPDES Implementation of Instream Dissolved Metals Standards - Freshwater Standards The NC 2007-2015 Water Quality Standard (WQS) Triennial Review was approved by the NC Environmental Management Commission (EMC) on November 13, 2014. The US EPA subsequently approved the WQS revisions on April 6, 2016, with some exceptions. Therefore, metal limits in draft permits out to public notice after April 6, 2016 must be calculated to protect the new standards - as approved. Table 1. NC Dissolved Metals Water Quality Standards/Aquatic Life Protection Parameter Acute FW, µg/1 (Dissolved) Chronic FW, µg/1 (Dissolved) Acute SW, 1.1g/1 (Dissolved) Chronic SW, µg/1 (Dissolved) Arsenic 340 150 69 36 Beryllium 65 6.5 --- --- Cadmium Calculation Calculation 40 8.8 Chromium III Calculation Calculation --- --- Chromium VI 16 11 1100 50 Copper Calculation Calculation 4.8 3.1 Lead Calculation Calculation 210 8.1 Nickel -Calculation Calculation 74 8.2 Silver Calculation 0.06 1.9 0.1 Zinc Calculation Calculation 90 81 Table 1 Notes: 1. FW= Freshwater, SW= Saltwater 2. Calculation = Hardness dependent standard 3. Only the aquatic life standards listed above are expressed in dissolved form. Aquatic life standards for Mercury and selenium are still expressed as Total Recoverable Metals due to bioaccumulative concerns (as are all human health standards for all metals). It is still necessary to evaluate total recoverable aquatic life and human health standards listed in 15A NCAC 2B.0200 (e.g., arsenic at 10 µg/1 for human health protection; cyanide at 5 µg/L and fluoride at 1.8 mg/L for aquatic life protection). Table 2. Dissolved Freshwater Standards for Hardness -Dependent Metals The Water Effects Ratio (WER) is equal to one unless determined otherwise under 15A NCAC 02B .0211 Subparagraph (11)(d) Metal NC Dissolved Standard, µg/I Cadmium, Acute WER*{1.136672-[In hardness](0.041838)} • e^{0.9151 [In hardness]-3.1485} Cadmium, Acute Trout waters WER* { 1.136672-[In hardness](0.041838) } • e^ {0.9151 [In hardness]-3.6236} Cadmium, Chronic WER* { 1.101672-[ln hardness](0.041838)} • e^ {0.7998[In hardness]-4.4451 } Chromium III, Acute WER*0.316 • e^{0.8190[ln hardness]+3.7256} Chromium III, Chronic WER*0.860 • e^{0.8190[In hardness]+0.6848} Copper, Acute WER*0.960 • e^{0.9422[ln hardness]-1.700} Copper, Chronic WER*0.960 • e^{0.8545[ln hardness]-1.702} Page 9 of 13 Permit No. NC0025321 Lead, Acute WER*{1.46203-[In hardness](0.145712)} • e^{1.273[In hardness]-1.460} Lead, Chronic WER*{1.46203-[In hardness](0.145712)} • e^{1.273[ln hardness]-4.705} Nickel, Acute WER*0.998 • e^{0.8460[ln hardness]+2.255} Nickel, Chronic WER*0.997 • e^{0.8460[ln hardness]+0.0584} Silver, Acute WER*0.85 • e^{1.72[1n hardness]-6.59} Silver, Chronic Not applicable Zinc, Acute WER*0.978 • e^{0.8473[ln hardness]+0.884} Zinc, Chronic WER*0.986 • e^{0.8473[In hardness]+0.884} General Information on the Reasonable Potential Analysis (RPA) The RPA process itself did not change as the result of the new metals standards. However, application of the dissolved and hardness -dependent standards requires additional consideration in order to establish the numeric standard for each metal of concern of each individual discharge. The hardness -based standards require some knowledge of the effluent and instream (upstream) hardness and so must be calculated case -by -case for each discharge. Metals limits must be expressed as `total recoverable' metals in accordance with 40 CFR 122.45(c). The discharge -specific standards must be converted to the equivalent total values for use in the RPA calculations. We will generally rely on default translator values developed for each metal (more on that below), but it is also possible to consider case -specific translators developed in accordance with established methodology. RPA Permitting Guidance/WQBELs for Hardness -Dependent Metals - Freshwater The RPA is designed to predict the maximum likely effluent concentrations for each metal of concern, based on recent effluent data, and calculate the allowable effluent concentrations, based on applicable standards and the critical low -flow values for the receiving stream. If the maximum predicted value is greater than the maximum allowed value (chronic or acute), the discharge has reasonable potential to exceed the standard, which warrants a permit limit in most cases. If monitoring for a particular pollutant indicates that the pollutant is not present (i.e. consistently below detection level), then the Division may remove the monitoring requirement in the reissued permit. 1. To perform a RPA on the Freshwater hardness -dependent metals the Permit Writer compiles the following information: • Critical low flow of the receiving stream, 7Q10 (the spreadsheet automatically calculates the 1Q10 using the formula 1Q10 = 0.843 (s7Q10, cfs) 0.993 • Effluent hardness and upstream hardness, site -specific data is preferred • Permitted flow • Receiving stream classification 2. In order to establish the numeric standard for each hardness -dependent metal of concern and for each individual discharge, the Permit Writer must first determine what effluent and instream (upstream) hardness values to use in the equations. The permit writer reviews DMR's, Effluent Pollutant Scans, and Toxicity Test results for any hardness data and contacts the Permittee to see if any additional data is available for instream hardness values, upstream of the discharge. Page 10 of 13 Permit No. NC0025321 If no hardness data is available, the permit writer may choose to do an initial evaluation using a default hardness of 25 mg/L (CaCO3 or (Ca + Mg)). Minimum and maximum limits on the hardness value used for water quality calculations are 25 mg/L and 400 mg/L, respectively. If the use of a default hardness value results in a hardness -dependent metal showing reasonable potential, the permit writer contacts the Permittee and requests 5 site -specific effluent and upstream hardness samples over a period of one week. The RPA is rerun using the new data. The overall hardness value used in the water quality calculations is calculated as follows: Combined Hardness (chronic) = (Permitted Flow, cfs *Avg. Effluent Hardness, mg/L) + (s7Q10, cfs *Avg. Upstream Hardness, mg/L) (Permitted Flow, cfs + s7Q10, cfs) The Combined Hardness for acute is the same but the calculation uses the 1 Q 10 flow. 3. The permit writer converts the numeric standard for each metal of concern to a total recoverable metal, using the EPA Default Partition Coefficients (DPCs) or site -specific translators, if any have been developed using federally approved methodology. EPA default partition coefficients or the "Fraction Dissolved" converts the value for dissolved metal at laboratory conditions to total recoverable metal at in -stream ambient conditions. This factor is calculated using the linear partition coefficients found in The Metals Translator: Guidance for Calculating a Total Recoverable Permit Limit from a Dissolved Criterion (EPA 823-B-96-007, June 1996) and the equation: Cdiss = 1 Ctotal 1 + { [K0] [ss0'l [10'] } Where: ss = in -stream suspended solids concentration [mg/1], minimum of 10 mg/L used, and Kpo and a = constants that express the equilibrium relationship between dissolved and adsorbed forms of metals. A list of constants used for each hardness -dependent metal can also be found in the RPA program under a sheet labeled DPCs. 4. The numeric standard for each metal of concern is divided by the default partition coefficient (or site -specific translator) to obtain a Total Recoverable Metal at ambient conditions. In some cases, where an EPA default partition coefficient translator does not exist (ie. silver), the dissolved numeric standard for each metal of concern is divided by the EPA conversion factor to obtain a Total Recoverable Metal at ambient conditions. This method presumes that the metal is dissolved to the same extent as it was during EPA's criteria development for metals. For more information on conversion factors see the June, 1996 EPA Translator Guidance Document. 5. The RPA spreadsheet uses a mass balance equation to determine the total allowable concentration (permit limits) for each pollutant using the following equation: Ca = (s7Q10 + Ow) (Cwqs) — (s7Q10) (Cb) Qw Where: Ca = allowable effluent concentration (µg/L or mg/L) Page 11of13 Permit No. NC0025321 Cwqs = NC Water Quality Standard or federal criteria (µg/L or mg/L) Cb = background concentration: assume zero for all toxicants except NH3* (µg/L or mg/L) Qw = permitted effluent flow (cfs, match s7Q10) s7Q10 = summer low flow used to protect aquatic life from chronic toxicity and human health through the consumption of water, fish, and shellfish from noncarcinogens (cfs) * Discussions are on -going with EPA on how best to address background concentrations Flows other than s7Q10 may be incorporated as applicable: 1 Q 10 = used in the equation to protect aquatic life from acute toxicity QA = used in the equation to protect human health through the consumption of water, fish, and shellfish from carcinogens 30Q2 = used in the equation to protect aesthetic quality 6. The permit writer enters the most recent 2-3 years of effluent data for each pollutant of concern. Data entered must have been taken within four and one-half years prior to the date of the permit application (40 CFR 122.21). The RPA spreadsheet estimates the 95th percentile upper concentration of each pollutant. The Predicted Max concentrations are compared to the Total allowable concentrations to determine if a permit limit is necessary. If the predicted max exceeds the acute or chronic Total allowable concentrations, the discharge is considered to show reasonable potential to violate the water quality standard, and a permit limit (Total allowable concentration) is included in the permit in accordance with the U.S. EPA Technical Support Document for Water Quality -Based Toxics Control published in 1991. 7. When appropriate, permit writers develop facility specific compliance schedules in accordance with the EPA Headquarters Memo dated May 10, 2007 from James Hanlon to Alexis Strauss on 40 CFR 122.47 Compliance Schedule Requirements. 8. The Total Chromium NC WQS was removed and replaced with trivalent chromium and hexavalent chromium Water Quality Standards. As a cost savings measure, total chromium data results may be used as a conservative surrogate in cases where there are no analytical results based on chromium III or VI. In these cases, the projected maximum concentration (95th %) for total chromium will be compared against water quality standards for chromium III and chromium VI. 9. Effluent hardness sampling and instream hardness sampling, upstream of the discharge, are inserted into all permits with facilities monitoring for hardness -dependent metals to ensure the accuracy of the permit limits and to build a more robust hardness dataset. 10. Hardness and flow values used in the Reasonable Potential Analysis for this permit included: Parameter Value Comments (Data Source) Average Effluent Hardness (mg/L) [Total as, CaCO3 or (Ca -I -Mg)] 371.5 Average Upstream Hardness (mg/L) [Total as, CaCO3 or (Ca+Mg)] 25 Default Value 7Q10 summer (cfs) 95 1Q10 (cfs) 77.57 Permitted Flow (MGD) 6.0 Date: 1/26/2017 Permit Writer: Claire Welling Page 12 of 13 Table 3. BOD and TSS Monthly Average Removal 2015-2016 Permit No. NC0025321 BOD Monthly Average (mg/1) Removal TSS Monthly Average (mg/1) Removal influent Effluent % influent Effluent % Jan. 2015 101.6 10.9 89.3 120.3 17.4 85.6 Feb. 2015 96.2 10.8 88.8 124.7 13.0 89.6 Mar. 2015 93.2 10.4 88.8 152.1 12.6 91.7 Apr.2015 100.5 8.9 91.2 168.1 10.6 93.7 May. 2015 147.6 7.6 94.9 217.1 7.6 96.5 95.2 Jun. 2015 143.1 12.6 91.2 219.0 10.6 July. 2015 138.3 13.0 90.6 230.0 8.3 96.4 Aug. 2015 144.5 9.9 93.1 311.4 7.6 97.6 Sept. 2015 150.8 10.0 93.4 264.1 12.7 95.2 Oct.2015 113.6 6.3 94.4 198.8 9.4 95.3 Nov.2015 93.3 7.9 91.5 157.6 9.2 94.1 Dec. 2015 102.9 9.7 90.6 173.6 9.1 94.8 Jan.2016 94.2 6.8 92.7 150.8 6.7 95.6 Feb.2016 124.6 10.7 91.4 185.6 8.2 95.6 Mar.2016 133.2 9.0 93.2 218.3 7.4 96.6 Apr. 2016 128.5 7.9 93.9 157.3 6.8 95.7 May. 2016 142.2 12.3 91.3 226.8 12.7 94.4 Jun.2016 144.6 11.1 92.3 224.7 16.2 92.8 July. 2016 146.7 6.7 95.4 238.2 23.6 90.1 Aug. 2016 145.0 5.6 96.1 217.9 23.1 89.4 Page 13 of 13 Freshwater RPA - 95% Probability/95% Confidence Using Metal Translators MAXIMUM DATA POINTS = 58 REQUIRED DATA ENTRY Table 1. Project Information Facility Name WWTP/WTP Class NPDES Permit Outfall Flow, Qw (MGD) Receiving Stream HUC Number Stream Class ❑Aooiy WS Hardness WQC 7Q10s (cfs) 7Q10w (cfs) 30Q2 (cfs) QA (cfs) 1Q10s (cfs) Effluent Hardness Upstream Hardness_ Combined Hardness Chronic Combined Hardness Acute Data Source(s) ❑CHECK IF HQW OR ORW WQS Town of Waynesville WWTP 4 NC0025321 001 6.000 Pigeon River 06010105 95.00 111.00 ECHECK TO APPLY MODEL 518.00 77.57 371.5 mg/L (Avg) 25 mg/L (Avg) 55.9 mg/L 62.1 mg/L Table 2. Parameters of Concern Par01 Par02 Par03 Par04 Par05 Par0G Par07 Par08 Par09 Par10 Par11 Par12 Per13 Par14 Perl5 Par16 Par17 Par18 Peri 9 Par20 Par21 Par22 Par23 Par24 Name WQS Type Chronic Modifier PQL Arsenic Aquactic Life C 150 FW 340 ug/L Arsenic Human Health Water Supply C 10 HH/WS N/A ug/L Beryllium Aquatic Life NC 6.5 FW 65 ug/L Cadmium Aquatic Life NC 1.0836 FW 7.1655 ug/L Chlorides Aquatic Life NC 230 FW 0 Chlorinated Phenolic Compounds Water Supply NC 1 A ug/L yTotal Phenolic Compounds Aquatic Life NC 300 A ug/L Chromium III Aquatic Life NC 227.5560 FW 1906.7283 ug/L Chromium VI Aquatic Life NC 11 FW 16 pg/L Chromium, Total Aquatic Life NC N/A FW N/A pg/L Copper Aquatic Life NC 15.6732 FW 24.6779 ug/L Cyanide Aquatic Life NC 5 FW 22 10 ug/L Fluoride Aquatic Life NC 1,800 FW ug/L Lead Aquatic Life NC 7.2254 FW 208.2690 ug/L Mercury Aquatic Life NC 12 FW 0.5 nglL Molybdenum Human Health NC 2000 HH ug/L Nice Aquatic Life NC 73.5420 FW 723.7431 pg/L Nickel Water Supply NC 25.0000 WS N/A ug/L Selenium Aquatic Life NC 5 FW 56 ug/L Silver Aquatic Life NC 0.06 FW 1.4173 ug/L Zinc Aquatic Life NC 250.5949 FW 271.7291 ug/L NC0025321- Waynesville- 2016 RPA, input 11/8/2016 REASONABLE POTENTIAL ANALYSIS H1 Effluent Hardness Date Data BDL=1/2DL Results 1 8/12/2013 350 350 Std Dev. 2 11/4/2014 480 480 Mean 3 2/10/2015 610 610 C.V. (default) 4 2/2/2016 46 46 n 5 10th Per value 6 Average Value 7 Max. Value 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 Use "PASTE SPECIAL Values" then "COPY" . Maximum data points = 58 Par01 & Par02 Arsenic 24 1.5692 371.5000 0.6000 4 137.20 mg/L 371.50 mg/L 610.00 mg/L Date Data BDL=1/2DL Results Use "PASTE SPECIAL Values" then "COPY" . Maximum data points = 58 1 2/7/2012 < 1.6 0.8 Std Dev. 1.6851 2 < 1.5 0.75 Mean 4.0438 3 < 1.5 0.75 C.V. 0.4167 4 3.9 3.9 n 16 5 3.5 3.5 6 < 10 5 Mult Factor = 1.32 7 < 10 5 Max. Value 5.0 ug1L 8 < 10 5 Max. Pred Cw 6.6 ug/L 9 < 10 5 10 < 10 5 11 < 10 5 12 < 10 5 13 < 10 5 14 < 10 5 15 < 10 5 16 5/3/2016 < 10 5 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 NC0025321- Waynesville- 2016 RPA, data 11/8/2016 REASONABLE POTENTIAL ANALYSIS Pall Use "PASTE SPECIAL Par12 Par14 Values" then "COPY" Maximum data points = 58 Use "PASTE SPECIAL Values" then "COPY" - Maximum data points = 58 Use "PASTE SPECIAL. Values" then "COPY" . Maximum points = 58 Co er PP Cyanide Lead Date Data 2/7/2012 BDL=1/2DL Results Date DataBDL=1/2DL Results Date BDL=1/2DI Results 1 2 3.7 3.7 6.5 Std Dev. 4.1751 1 2/7/2012 < 2 5 Std Dev. 3.5777 1 2/7/2012 < 0.6 0.3 Std Dev. 0.8565 3 6.5 12 Mean 7.6100 2 < 1 5 Mean 5.80 2 1.4 1.4 Mean 1.9600 4 12 3 C.V. 0.5486 3 3 5 C.V. 0.6168 3 0.96 0.96 C.V. 0.4370 3 n 20 4 < 1 5 n 20 4 0.48 0.48 n 16 5 8.5 8.5 5 3 5 5 0.72 0.72 6 7 6 6 6 Mult Factor = 1.33 6 3 5 Mult Factor = 1.37 6 < 5 2.5 Mult Factor = 1.34 8 6 Max. Value 18.00 ug/L 7 5 5 Max. Value 21.0 ug/L 7 < 5 2.5 Max. Value 2.500 ug/L 9 5 5 Max. Pred Cw 23.94 ug/L 8 < 10 5 Max. Pred Cw 28.8 ug/L 8 < 5 2.5 Max. Pred Cw 3.350 ug/L 8 8 9 < 5 5 9 < 5 2.5 10 8 8 10 < 5 5 10 < 5 2.5 11 16 16 11 < 5 5 11 < 5 2.5 12 5 5 12 6 5 12 < 5 2.5 13 10 10 13 < 5 5 13 < 5 2.5 14 6 6 14 < 5 5 14 < 5 2.5 15 4 4 15 21 21 15 < 5 2.5 16 8 8 16 9 5 16 5/3/2016 < 5 2.5 17 9 9 17 5 5 17 18 9 9 18 5 5 18 19 18 18 19 < 5 5 19 20 8/2/2016 < 1 0.5 20 8/2/2016 6 5 20 21 21 21 22 22 22 23 23 23 24 24 24 25 25 25 26 26 26 27 27 27 28 28 28 29 29 29 30 30 30 31 31 31 32 32 32 33 33 33 34 34 34 -3- NC0025321- Waynesville- 2016 RPA, data 11/8/2016 REASONABLE POTENTIAL ANALYSIS Par15 use "PASTE SPECIAL Par17 & Par18 Values" "COPY" Use Use "PASTE SPECIAL Use "PASTE SPECIAL. Mercury rY Molybdenum Nickel then Maximurn data Values" then "COPY" Values" then "COPY" points = se Maximum data points = 56 . Maximum data points = 58 Date Data BDL=1/2DL Results Date Data BDL=1/2DL Results Date Data BDL=1/2DL Results 1 2 2/7/2012 4.7 4.7 Std Dev. 6.7047 1 2/7/2012 < 0.43 0.215 Std Dev. 3.0177 1 2/7/2012 < 2.8 1.4 Std Dev. 1.6157 3 6.7 6.7 Mean 9.3888 2 < 0.5 0.25 Mean 4.8819 2 1.8 1.8 Mean 3.9875 5 5 C.V. 0.7141 3 < 10 5 C.V. 0.6181 3 2 2 C.V. 0.4052 4 27 27 n 16 4 < 10 5 n 13 4 3 3 n 16 5 8.2 8.2 5 < 10 5 5 0.6 0.6 6 7 8.49 8.49 4.04 Mult Factor = 1.56 6 < 10 5 Mult Factor = 1.60 6 < 10 5 Mult Factor = 1.31 8 4.04 22.4 Max. Value 27.0 ng/L 7 < 10 5 Max. Value 13.0 ug/L 7 < 10 5 Max. Value 5.0 ug/L 9 22.4 7.83 7.83 Max. Pred Cw 42.1 ng/L 8 9 < 10 13 5 13 Max. Pred Cw 20.8 ug/L 8 9 < < 10 10 5 5 Max. Pred Cw 6.6 pg/L 10 5.8 5.8 10 < 10 5 10 < 10 5 11 7.12 7.12 11 < 10 5 11 < 10 5 12 3.65 3.65 12 < 10 5 12 < 10 5 13 6.22 6.22 13 5/3/2016 < 10 5 13 < 10 5 14 16.4 16.4 14 14 < 10 5 15 8.94 8.94 15 15 < 10 5 16 5/3/2016 7.73 7.73 16 16 5/3/2016 < 10 5 17 17 17 1a 18 18 19 19 19 20 20 20 21 21 21 22 22 22 23 23 23 24 24 24 25 25 25 26 26 26 27 27 27 28 28 28 29 29 29 30 30 30 31 31 31 32 32 32 33 33 33 34 34 34 -4- NC0025321- Waynesville- 2016 RPA, data 11/8/2016 Par21 Zinc Date Data BDL=1/2DL Results 1 2/7/2012 < 2.2 1.1 Std Dev. 2 33 33 Mean 3 56 56 C.V. 4 46 46 n 5 42 42 6 28 28 Mull Factor = 7 29 29 Max. Value 8 51 51 Max. Pred Cw 9 46 46 10 29 29 11 67 67 12 41 41 13 77 77 14 47 47 15 30 30 16 42 42 17 45 45 18 45 45 19 54 54 20 8/2/2016 58 58 21 22 23 24 25 26 27 28 29 30 31 32 33 34 REASONABLE POTENTIAL ANALYSIS Use"PASTE SPECIAL Values" then "COPY" . Maximum data points = 58 16.2190 43.3550 0.3741 20 1.22 77.0 ug/L 93.9 ug/L Par22 0 Date Data BDL=1/2DL Results 1 Std Dev. NO DATA Use "PASTE SPECIAL Values" then "COPY- . Maximum data points = 56 2 Mean NO DATA 3 C.V. NO DATA 4 n 0 5 6 Mult Factor = N/A 7 Max. Value N/A 8 Max. Pred Cw N/A 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 -5- Par23 Date Data BDL=1/2DL 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 NC0025321- Waynesville- 2016 RPA, data 11/8/2016 Town of Waynesville WWTP NC0025321 Freshwater RPA - 95% Probability/95% Confidence Using Metal Translators MAXIMUM DATA POINTS = 58 Qw (MGD) = 6.00 1Q10S(cfs)= 77.57 7Q1OS (cfs) = 95.00 7Q1OW (cfs) = 111.00 30Q2 (cfs) = NO 30Q2 DATA Avg. Stream Flow, QA (cfs) = 518.00 Receiving Stream: Pigeon River HUC 06010105 WWTP/WTP Class: 4 IWC% Qa 1QIOS = 10.70565212 IWC% ta3 7Q1OS = 8.916586769 IWC% 7Q1OW = 7.730673317 IWC% @ 30Q2 = N/A IW%C ta3 QA = 1.763701877 Stream Class: C Outfall 001 Qw=6MGD COMBINED HARDNESS (me/L) Acute = 62.1 mg/L Chronic = 55.9 mg/L PARAMETER TYPE NC STANDARDS OR EPA CRITERIA PQL UNITS REASONABLE POTENTIAL RESULTS RECOMMENDED ACTION lit ed Chronic Stapli d Acute ndAcute n # Det. Max PredCw AllowableCw Arsenic Arsenic C C 150 FW(7Q10s) 340 10 HH/WS(Qavg) uJL 16 2 6.6 (FW): 3,175.9 Chronic (FW):---1,682.3------------------------------ Novalue > Allowable Cw__ Chronic (HH): 567.0 No value > Allowable Cw _ _ _ _ _ _ _ No RP, Predicted Max < 50% of Allowable Cw - No Monitoring required Copper NC 15.6732 FW(7Q10s) 24.6779 ug/L 20 19 23.94 Acute: 230.51 ___ _ ___ Chronic: 175.78 No value > Allowable Cw No RP, Predicted Max < 50% of Allowable Cw - No Monitoring required (-- Cyanide NC 5 FW(7Q10s) 22 10 ug/L 20 10 28.8 Acute: 205.5 ___ _ _____ Chronic: 56.1 No value > Allowable Cw No RP , Predicted Max >_ 50% of Allowable Cw apply Quarterly Monitoring Lead NC 7.2254 FW(7Q10s) 208.2690 ug/L 16 4 3.350 Acute: 1;9 .5 .12 ___ _ ____ _ _ Chronic: 81.033 No value > Allowable Cw No RP, Predicted Max < 50% of Allowable Cw - No Monitoring required Mercury NC 12 FW(7Q10s) 0.5 ng/L 16 1:) 42.1 Acute: NO WQS ___ _ __ Chronic: 134.E No value> Allowable Cw No RP, Predicted Max < 50% of Allowable Cw - No Monitoring required Molybdenum NC 2000 HH(7Q10s) ug/L 13 1 20.8 Acute: • NO WQS ___ _ ___ _ Chronic: 22,430.1 No value > Allowable Cw No RP, Predicted Max < 50% of Allowable Cw - No Monitoring required Nickel Nickel NC NC 73.5420 FW(7Q10s) 723.7431 25.0000 WS(7Q10s) µJL µg/L, 16 6.6 Acute (FW): 6,760.4 Chronic (FW): 824.8 Novalue >AllowableCCw___ Chronic (WS): 280.4 No value> Allowable Cw - - - - - - - - - - - _ ___ _ _ No RP, Predicted Max <5o"/u of Allowable Cw- No Monitoring required Zinc NC 250.5949 FW(7Q10s) 271.7291 ug/L 20 IH! 93.9 Acute: 2,538.2 ___ _ __ _ _ Chronic: 2,810.4 No value > Allowable Cw No RP, Predicted Max < 50% of Allowable Cw - No Monitoring required 0 0 N/A Acute: Page 1 of 2 NC0025321- Waynesville- 2016 RPA, rpa 11/8/2016 NH3/TRC WLA Calculations Facility: Waynesville WWTP PermitNo. NC0025321 Prepared By: Claire Welling Enter Design Flow (MGD): Enter s7Q10 (cfs): Enter w7Q10 (cfs): 6 • 95 111 Total Residual Chlorine (TRC) Daily Maximum Limit (ug/I) s7Q10 (CFS) DESIGN FLOW (MGD) DESIGN FLOW (CFS) STREAM STD (UG/L) Upstream Bkgd (ug/I) IWC (%) Allowable Conc. (ug/I) Fecal Coliform Monthly Average Limit: (If DF >331; Monitor) (If DF<331; Limit) Dilution Factor (DF) Ammonia (Summer) Monthly Average Limit (mg NH3-N/I) 95 s7Q10 (CFS) 6 DESIGN FLOW (MGD) 9.3 DESIGN FLOW (CFS) 17.0 STREAM STD (MG/L) 0 Upstream Bkgd (mg/I) 8.92 IWC (%) 191 Allowable Conc. (mg/I) Ammonia (Winter) Monthly Average Limit (mg NH3-N/I) w7Q10 (CFS) 200/100m1 DESIGN FLOW (MGD) DESIGN FLOW (CFS) STREAM STD (MG/L) 11.22 Upstream Bkgd (mg/I) 1WC (%) Allowable Conc. (mg/I) Total Residual Chlorine 1. Cap Daily Max limit at 28 ug/I to protect for acute toxicity Ammonia (as NH3-ND 1. If Allowable Conc > 35 mg/I, Monitor Only 2. Monthly Avg limit x 3 = Weekly Avg limit (Municipals); capped at 35 mg/I 3. Monthly Avg limit x 5 = Daily Max limit (Non-Munis); capped at 35 mg/I 95 6 9.3 1.0 0.22 8.92 9.0 111 6 9.3 1.8 0.22 7.73 20.7 Fecal Coliform 1. Monthly Avg limit x 2 = 400/100 ml = Weekly Avg limit (Municipals) = Daily Max limit (Non -Muni) Environmental Quality Draft 2016 Category 5 Assessments EPA Submittal-303(d) List Pigeon River Subbasin French Broad River Basin Fines Creek From source to Pigeon River 5-32 C 9.7 FW Miles Assessment Criteria Status Reason for Rating Parameter of Interest Category Exceeding Criteria Fair Fish Community (Nar, AL, FW) 5 Inman Branch From source to West Fork Pigeon River 5-2-16 WS-III;Tr 2.0 FW Miles Assessment Criteria Status Reason for Rating Parameter of Interest Category Exceeding Criteria > 10% and >90 conf Turbidity (10 NTU, AL, Tr) PIGEON RIVER (Waterville Lake bel From 0.15 miles downstream of W. Park St to State Route 1642 (Main Street) 5-(7)b C 6.4 FW Miles Assessment Criteria Status Reason for Rating Parameter of Interest Category Exceeding Criteria Fair Benthos (Nar, AL, FW) Richland Creek (Lake Junaluska) 5-16-(1)a From source to US Route 23 B;Tr 8.0 FW Miles Assessment Criteria Status Reason for Rating Parameter of Interest Category Exceeding Criteria FCB 5in30 GM >200 or >2 Fecal Coliform (GM 200/400, REC, FW) 5r Richland Creek (Lake Junaluska) 5-16-(1)b From US Route 23 to Boyd Ave B;Tr 2.3 FW Miles Assessment Criteria Status Reason for Rating Parameter of Interest Category Exceeding Criteria FCB 5in30 GM >200 or >2 Fecal Coliform (GM 200/400, REC, FW) 6/6/2016 Draft 2016 NC Category 5 Assessments- EPA Submittal Page 49 of 209 Gavin Brown, Mayor Gary Caldwell; Mayor Pro Tem Jon Feichter, Alderman Julia Freeman, Alderman LeRoy Roberson, Alderman December 9, 2016 WAYNESVILLE North Coroli Progress with Vision 1871 Marcia D. Onieal, Town Manager Woody Griffin, Town Attorney TOWN OF WAYNESVILLE NPDES Draft Permit Renewal Permit No. NC0025321 NCDEQ-NPDES Unit Attn: Claire Welling Engineer, NPDES Wastewater 1617 Mail Service Center Raleigh, NC 27699-1617 Ms. Welling, Thank you for the opportunity to review the draft permit conditions for the above referenced permit at the Town of Waynesville Wastewater Treatment Plant located off of NC 209. Several changes are proposed to the permit that we feel are either not warranted or unfavorable for the current operating plant. The Town has contracted a specialized engineering firm to help the Town develop a strategic improvement plan with the goal of making significant plant upgrades and operational improvements over the next decade. This plan will aid in prioritizing the needs of the plant and assist the Town in soliciting the necessary funds to address aging infrastructure to meet the requirements of the NPDES permit. The intent of the strategic plan is to help Waynesville's plant meet our waste water treatment needs well into the future. Upon full review of the draft permit, the Town requests that no change in permit conditions be implemented (with the exception of eDMR) until further plant upgrades can be assessed and implemented. It's our understanding that a significantly remodeled plant operation will result in a new review and permit parameters, and we feel that we can best meet new and future permit parameters with our upcoming plant changes. Please contact us for further discussions before a new permit is issued. Thank you for your consideration. Sincerely, ,'aaeataa 0,9 Preston Gregg, PE, PMP Town Engineer 129 Legion Dr. • P.O. Box 100 • Waynesville, NC 28786 Phone (828) 456-3706 Fax (828)456-2000 Web Address: www.waynesvillenc.eov •,' Id': • , ' . • ' ". Haywood County Land Records / GIS Version - June 2005 Scale : 1 Inch = 1500 Feet, Date : 07/12/2005 This map is prepared for the inventory of reef property found milin this Jurisdiction and is compiled from recorded deeds. plats and other public records and data. Users of this map are hereby notified that the aformentioned public primary in- formation sources should be consuked for verification ol the krformalion contained on this map. The county rar US EISSURIC9 any legal responsibility for the information contained on this map 6 m d Inf.Sampler 9 Automatic l of . Screen Flow Meter Grit Chamber Primary Clarifiers 3 Mgd 3 Mgd Town Of Waynesville VVWTP Flow Schematic Primary Eff. Lift Station Primary Sludge Flow 0.01 mgd Pr - Secondary Gravity Thickener Eff. Return Aeration Basins 4 Secondary Clarifiers 2 Chlorine Contact Chamber Sludge Flow to Digester 0.008 mgd t‘ Primary Gravity Thickener Belt Press Filtrate & Primary Gravity Thickener Eff. Return All Sludge Waste Flows are approximate and will change seasonally. Vic RAS Flow 2.5=-3.0mgd -41- WAS Flow 0.2 mgd Secondary Gravity Thickener Anaerobic Digester Main Plant flow Primary Sludge Flow RAS & Secondary Thickener Eff. WAS Belt Press Filtrate & Primary Thickener Eff. Primary & Secondary Sludge flow through Anaerobic Digester to Belt Press and Biosolids storage Page 1 Eff. Sampler Discharge 001- to Pigeon River Belt Press Dewatering & Lime Stabilization Biosolids Storage Area Town of Waynesville WWTP NC0025321 Installed Treatment Components 1. Influent Flowmeter ISCO Ultrasonic model #4210 connected to circular chart recorder & totalizer in WWTP Laboratory. Primary flow device is 24" Palmer Bowlus Flume. 2. Parkson Aquaguard InIfuent Screen model # AG -MN -A Opening size 0.56" 3. Aerated Grit Chamber with 7.5 HP air lift blower. 3 HP aerator blower. 400 gpm Combs grit separator. Grit Chamber dimensions are 16' long 13' wide 11' deep. 17,160 gallon capacity. 4. 2 Circular Primary Clarifiers 80' diameter 8' deep with oil skimmers and 1500 gallon grease collection tank. Combined capacity is 0.60 MG. 2 Dorr Oliver primary sludge withdraw pumps 3" air operated. Sludge pump maximum capacity combined with current air compressor is 33,120 gpd. 5. Primary Effluent Lift Station 3-10" Gorman Rupp suction lift pumps 2500 gpm capacity each. 6. 4 Aeration Basins with coarse air diffusion 189' long 29' wide 12.2' deep. Capacity is 0.50MG each. Aeration supplied with 4 Hoffman Centrifugal Compressors at a capacity of 3500 CFM each. 7. 2 Rectangular Leopold Clarivac secondary clarifiers 148' long 55' wide 8' deep. Capacity is 0.48 MG each. Sludge withdrawal is maintained with floating bridge continuous vacuum siphon. Return sludge is pumped with 2-10" centrifugal pumps back to aeration basin. Waste sludge is pumped with 4" centrifugal pump to secondary gravity thickner. 8. Chlorine Mixer Capacity 6 MGD 9. Chlorine Contact Basin with 2-5' rectangular weirs at effluent discharge point. Dimensions of basin is 74' long 48" wide 5' deep. Volume is 130,000 gallons. 10. 1 Primary Sludge Gravity Thickener. Dimensions are 22' diameter 10' deep volume of 28,495 gallons. Sludge is withdrawn with 3" Dorr Oliver air diaphragm pump and 3" progressive cavity pump to anaerobic digester. 11. 1 Secondary Sludge Gravity Thickener. Dimensions are 28' diameter 10' deep volume of 46,158 gallons. Sludge is withdrawn with 3" progressive cavity pump to anaerobic digester. 12. 1 Gas mixed Floating Cover Anaerobic Digester with 500,00 BTU sludge heater. 4" centrifugal recirculation pump and 4" progressive cavity withdraw pump. Dimensions are 60' diameter 23' deep volume is 487,485 gallons. 13. 1 Belt Filter Press size is 1.5 meter. 14. Sludge Stabilization equipment for production of Class A biosolids. This equipment consists of. 1-24 ton lime silo 1-sludge & lime blender with external electrical heat source. 1-lime volume control screw conveyor. 1-agricultural lime volume control screw conveyor. 1-sludge screw conveyor. 1 —invessel pasteurization unit with external electrical heat source. 1-finished product belt conveyor. 15. 2-Chlorinators for effluent disinfection. Capacity is 2001b Per day. Solution water from wells on site. 16. 1 Backup Generator 180KW serves as backup power for Primary Effluent pump station, return activated sludge pumps, laboratory power, and secondary clarifiers.