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HomeMy WebLinkAboutNC0020940_Draft Permit_20190805 STATEry \ ROY COOPER , Governor \P' ;�MICHAEL S.REGAN Secretary airw LINDA CULPEPPER NORTH CAROLINA Director Environmental Quality August 5, 2019 Ms.Anna Payne,Town Manager Town of Murphy P.O. Box 130 Murphy,North Carolina 28906 Subject: Draft NPDES Permit Renewal Permit NC0020940 Murphy WWTP Cherokee County Grade III Biological WPCS SIC Code 4952 Dear Ms. Payne: 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: • Per 15A NCAC 2B .0508, since the facility discharges greater than 1 MGD of treated wastewater and is in the Hiwassee River Basin,the monitoring frequency for total nitrogen and total phosphorous has been increased to quarterly[See A.(1.)]. • The NC 2007-2014 Water Quality Standard(WQS)Triennial Review was approved by the NC Environmental Management Committee(EMC)on November 13, 2014.The US EPA subsequently approved the WQS revisions on April 6,2016 with some exceptions.The NC Division of Water Resources NPDES Permitting Unit is required to implement the new dissolved metal standards in all permits public noticed after April 6, 2016. The new standards for most metals include acute standards. Further,the freshwater standards for several metals are expressed as the dissolved form of the metals, and seven metals have hardness-dependent equations. As a result,the NPDES Permitting Unit will need site-specific effluent hardness data and instream hardness data, upstream of the discharge, for each facility monitoring these metals in order to calculate permit limitations. Effluent hardness and instream hardness sampling, upstream of the discharge, have been added to the permit at a monitoring frequency of quarterly [See A.(1.)]. • The Town of Murphy reported Total Silver at less than detection,with detection levels< 50.0 µg/L and<5.0 µg/L in the Discharge Monitoring Reports. The Town's allowable discharge concentration is 2.739 µg/L for Total Silver. DWR's laboratory identifies the target Practical Quantification Limits(PQLs) for Total Silver as 1.0 µg/L. 15A NCAC 2B .0505 (e) (4)requires that all test procedures must produce detection and reporting levels that are below the permit discharge requirements and all data generated must be reported to the approved detection level or lower reporting level of the procedure. If no approved North Carolina Department of Environmental Quality 1 Division of Water Resources ,rDE 512 North Salisbury Street 11617 Mail Service Center I Raleigh.North Carolina 27699-1617 ova+ el /"� 919.707.9000 methods are capable of achieving a detection level below the permit discharge requirement (or allowable discharge concentration)the method with the lowest detection level must be used.The Town should use sufficiently sensitive test methods for all pollutants, including when performing Effluent Pollutant Scans. Quarterly monitoring for total silver has been maintained in the permit [See A.(1.)]. • 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 Scan shall be performed(2020, 2021, and 2022). 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. • Federal regulations require electronic submittal of all discharge monitoring reports (DMRs)and program reports.The requirement to continue reporting discharge monitoring data electronically using the NC DWR's Electronic Discharge Monitoring Report(eDMR) internet application has been added to your NPDES permit [See Special Condition A. (4.)]. • Parameter codes have been added to the Effluent Limitations and Monitoring Requirements [ See A. (1.)]. • Regulatory citations have been added to the permit. 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/2BZ4xxx 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 Cherokee 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)707-3609 or by email at nick.coco@ncdenr.gov. Sincerely, Nick Coco, Engineer NPDES Complex Permitting Unit Hardcopy: NPDES Files Ecopy: US EPA Region 4 DWR/Asheville Regional Office/Water Quality/Tim Heim DWR/Operator Certification Program/Maureen Kinney DWR/Aquatic Toxicology Branch/Hannah Headrick Page 2 of 2 Permit NC0020940 STATE OF NORTH CAROLINA DEPARTMENT OF ENVIRONMENTAL QUALITY DIVISION OF WATER RESOURCES PERMIT TO DISCHARGE WASTEWATER UNDER THE NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM In compliance with the provisions of North Carolina General Statute 143-215.1, other lawful standards and regulations promulgated and adopted by the North Carolina Environmental Management Commission, and the Federal Water Pollution Control Act, as amended, Town of Murphy is hereby authorized to discharge wastewater from a facility located at Murphy Wastewater Treatment Plant 390 Payne Street Murphy Cherokee County to receiving waters designated as the Hiwassee River in the Hiwassee River Basin in accordance with the discharge limitations, monitoring requirements, and other conditions set forth in Parts I, II, III, and IV hereof. This permit shall become effective Month xx, 2019. This permit and the authorization to discharge shall expire at midnight on August 31, 2023. Signed this day Month xx, 2019. DRAFT Linda Culpepper, Director Division of Water Resources By Authority of the Environmental Management Commission Permit NC0020940 SUPPLEMENT TO PERMIT COVER SHEET All previous NPDES Permits issued to this facility,whether for operation or discharge are hereby revoked. As of this permit issuance, any previously issued permit bearing this number is no longer effective.Therefore,the exclusive authority to operate and discharge from this facility arises under the permit conditions, requirements, terms, and provisions included herein. The Town of Murphy is hereby authorized to: 1. Continue to operate a 1.4 MGD wastewater treatment facility that includes the following components: ➢ Bar Screen ➢ Flow splitter ➢ Extended aeration plant (SBR) in parallel ➢ Post Equalization Basin ➢ Effluent chlorination and dechlorination units ➢ Flow measurement ➢ Aerobic sludge digestion ➢ Belt Filter Press ➢ Sludge drying beds 2. Discharge from said treatment works at the location specified on the attached map into the Hiwassee River, classified C waters in the Hiwassee River Basin. Page 2 of 9 Permit NC0020940 Part I A.(1.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS(1.4 MGD) [15A NCAC 02B .0400 et seq., 02B .0500 et seq.] Grade III Biological Water Pollution Control System [15A NCAC 08G .0302] During the period beginning on the effective date of the permit and lasting until expiration,the Permittee is authorized to discharge treated domestic and industrial wastewater from outfall 001. Such discharges shall be limited and monitored'by the Permittee as specified below: PARAMETER CHARACTERISTICS EFFLUENT LIMITS MONITORING REQUIREMENTS Parameter Code Monthly Weekly Daily Measurement Sample Sample Average Average Maximum Frequency Type Location Flow 50050 1.4 MGD Continuous Recording Influent or Effluent BOD,5-day,20°C2 C0310 30.0 mg/L 45.0 mg/L 3/Week Composite Effluent,Influent Total Suspended Solids(TSS)2 C0530 30.0 mg/L 45.0 mg/L 3/Week Composite Effluent,Influent Ammonia(NH3 as N),mg/L C0610 3/Week Composite Effluent pH 00400 Between 6.0 and 9.0 standard units 3/Week Grab Effluent Fecal Coliform 200/100 400/100 31616 3/Week Grab Effluent (geometric mean) mL mL Total Residual Chlorine 50060 28 pg/L 3/Week Grab Effluent Temperature(°C) 00010 Daily Grab Effluent Total Mercury3 C0600 47 ng/L(annual average) Quarterly' Composite Effluent Total Silver,pg/L 01077 Quarterly' Composite Effluent Total Nitrogen(NO2+ C0600 Quarterly Composite Effluent NO3+TKN),mg/L Total Phosphorus,mg/L C0665 Quarterly Composite Effluent Total Hardness[as CaCO3]', 00900 Quarterly Composite Effluent mg/L Chronic Toxicity 5 TGP3B/THP3B Quarterly Composite Effluent Effluent Pollutant Scan NC01 Monitor&Report Footnote 6 Footnote 6 Effluent Total Hardness[as CaCO3]', 00900 Quarterly Composite Upstream mg/L Notes: 1. The Permittee shall submit discharge monitoring reports electronically using NC DWR's eDMR application system. See Special Condition A.(4.). 2. The monthly average BOD5 and Total Suspended Solids concentrations shall not exceed 15%of the respective influent value(85% removal). 3. The test for Total Mercury shall be EPA Method1631 E. 4. Quarterly monitoring shall be conducted on the same months as chronic toxicity. 5. Effluent Total Hardness sampling shall be conducted in conjunction with effluent metals for the pretreatment program. 6. Chronic Toxicity(Ceriodaphnia)P/F at 2.2%;tests shall be conducted in March,June,September and December[see A.(2.)for further details]. Chronic toxicity sampling shall coincide with metals sampling. 7. The permittee shall perform three Effluent Pollutant Scans during the term of this permit[see A.(3.)]. 8. The Permittee shall sample hardness upstream of the facility's discharge.The sample shall be representative of the hardness in the receiving stream.If the Permittee is a member of the Monitoring Coalition Program,sampling for upstream hardness may be waived as long as the Monitoring Coalition agrees to sample hardness at the nearest upstream location,at a minimum frequency of quarterly,and the Permittee has obtained approval from DWR-NPDES Permitting Unit that the upstream station being monitored by the Coalition is representative of the receiving stream for this discharge.The Permittee is responsible for submitting upstream hardness test results with its permit renewal application package. If Coalition membership is cancelled or the Coalition terminates upstream hardness sampling at the approved station,the Permittee will immediately notify the Division and resume sampling for upstream hardness, upstream of its discharge. There shall be no discharge of floating solids or visible foam in other than trace amounts. Page 3 of 9 Permit NC0020940 A.(2.) CHRONIC TOXICITY PERMIT LIMIT(Quarterly) [15A NCAC 02B.0200 et seq.] The effluent discharge shall at no time exhibit observable inhibition of reproduction or significant mortality to Ceriodaphnia dubia at an effluent concentration of 2.2%. The permit holder shall perform at a minimum,quarterly monitoring using test procedures outlined in the "North Carolina Ceriodaphnia Chronic Effluent Bioassay Procedure," Revised December 2010,or subsequent versions or"North Carolina Phase II Chronic Whole Effluent Toxicity Test Procedure"(Revised- December 2010) or subsequent versions.The tests will be performed during the months of March,June, September and December. These months signify the first month of each three-month toxicity testing quarter assigned to the facility. Effluent sampling for this testing must be obtained during representative effluent discharge and shall be performed at the NPDES permitted final effluent discharge below all treatment processes. If the test procedure performed as the first test of any single quarter results in a failure or ChV below the permit limit,then multiple-concentration testing shall be performed at a minimum,in each of the two following months as described in"North Carolina Phase II Chronic Whole Effluent Toxicity Test Procedure"(Revised-December 2010)or subsequent versions. All toxicity testing results required as part of this permit condition will be entered on the Effluent Discharge Monitoring Form (MR-1)for the months in which tests were performed, using the parameter code TGP3B for the pass/fail results and THP3B for the Chronic Value. Additionally, DWR Form AT-3 (original) is to be sent to the following address: Attention: North Carolina Division of Water Resources Water Sciences Section/Aquatic Toxicology Branch 1621 Mail Service Center Raleigh, NC 27699-1621 Completed Aquatic Toxicity Test Forms shall be filed with the Water Sciences Section no later than 30 days after the end of the reporting period for which the report is made. Test data shall be complete,accurate, include all supporting chemical/physical measurements and all concentration/response data,and be certified by laboratory supervisor and ORC or approved designate signature. Total residual chlorine of the effluent toxicity sample must be measured and reported if chlorine is employed for disinfection of the waste stream. Should there be no discharge of flow from the facility during a month in which toxicity monitoring is required,the permittee will complete the information located at the top of the aquatic toxicity(AT)test form indicating the facility name,permit number, pipe number,county,and the month/year of the report with the notation of"No Flow" in the comment area of the form. The report shall be submitted to the Water Sciences Section at the address cited above. Should the permittee fail to monitor during a month in which toxicity monitoring is required, monitoring will be required during the following month.Assessment of toxicity compliance is based on the toxicity testing quarter,which is the three month time interval that begins on the first day of the month in which toxicity testing is required by this permit and continues until the final day of the third month. Page 4 of 9 Permit NC0020940 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 5 of 9 Permit NC0020940 A.(3.) EFFLUENT POLLUTANT SCAN G.S. 143-215.1(W] 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: 2020, 2021,and 2022. 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) Trans-1,2-dichloroethylene Bis(2-chloroethyl)ether Chlorine(total residual,TRC) 1,1-dichloroethylene Bis(2-chloroisopropyl)ether Dissolved oxygen 1,2-dichloropropane Bis(2-ethylhexyl)phthalate Nitrate/Nitrite 1,3-dichloropropylene 4-bromophenyl phenyl ether Kjeldahl nitrogen Ethylbenzene Butyl benzyl phthalate Oil and grease Methyl bromide 2-chloronaphthalene Phosphorus Methyl chloride 4-chlorophenyl phenyl ether Total dissolved solids Methylene chloride Chrysene Hardness 1,1,2,2-tetrachloroethane Di-n-butyl phthalate Antimony Tetrachloroethylene Di-n-octyl phthalate Arsenic Toluene Dibenzo(a,h)anthracene Beryllium 1,1,1-trichloroethane 1,2-dichlorobenzene Cadmium 1,1,2-trichloroethane 1,3-dichlorobenzene Chromium Trichloroethylene 1,4-dichlorobenzene Copper Vinyl chloride 3,3-dichlorobenzidine Lead Acid-extractable compounds: Diethyl phthalate Mercury(EPA Method 1631E) P-chloro-m-cresol Dimethyl phthalate Nickel 2-chlorophenol 2,4-dinitrotoluene Selenium 2,4-dichlorophenol 2,6-dinitrotoluene Silver 2,4-dimethylphenol 1,2-diphenylhydrazine Thallium 4,6-dinitro-o-cresol Fluoranthene Zinc 2,4-dinitrophenol Fluorene Cyanide 2-nitrophenol Hexachlorobenzene Total phenolic compounds 4-nitrophenol Hexachlorobutadiene Volatile organic compounds: Pentachlorophenol Hexachlorocyclo-pentadiene Acrolein Phenol Hexachloroethane Acrylonitrile 2,4,6-trichlorophenol Indeno(1,2,3-cd)pyrene Benzene Base-neutral compounds: Isophorone Bromoform Acenaphthene Naphthalene Carbon tetrachloride Acenaphthylene Nitrobenzene Chlorobenzene Anthracene N-nitrosodi-n-propylamine Chlorodibromomethane Benzidine N-nitrosodimethylamine Chloroethane Benzo(a)anthracene N-nitrosodiphenylamine 2-chloroethylvinyl ether Benzo(a)pyrene Phenanthrene Chloroform 3,4 benzofluoranthene Pyrene Dichlorobromomethane Benzo(ghi)perylene 1,2,4-trichlorobenzene 1,1-dichloroethane Benzo(k)fluoranthene 1,2-dichloroethane Bis(2-chloroethoxy)methane Reporting. Test results shall be reported on DWR Form-A MR-PPA1 (or in a form approved by the Director) by December 315t 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. Page 6 of 9 Permit NC0020940 Additional Toxicity Testing Requirements for Municipal Permit Renewal. Please note that Municipal facilities that are subject to the Effluent Pollutant Scan requirements listed above are also subject to additional toxicity testing requirements specified in Federal Regulation 40 CFR 122.21(j)(5). The US EPA requires four(4)toxicity tests for a test organism other than the test species currently required in this permit. The multiple species tests should be conducted either quarterly for a 12-month period prior to submittal of the permit renewal application,or four tests performed at least annually in the four and one half year period prior to the application. These tests shall be performed for acute or chronic toxicity, whichever is specified in this permit. The multiple species toxicity test results shall be filed with the Aquatic Toxicology Branch at the following address: North Carolina Division of Water Resources Water Sciences Section/Aquatic Toxicology Branch 1621 Mail Service Center Raleigh, North Carolina 27699-1621 Contact the Division's Aquatic Toxicology Branch at 919-743-8401 for guidance on conducting the additional toxicity tests and reporting requirements. Results should also be summarized in Part E(Toxicity Testing Data) of EPA Municipal Application Form 2A, when submitting the permit renewal application to the NPDES Permitting Unit. A.(4.) ELECTRONIC REPORTING OF MONITORING REPORTS [G.S. 143-215.1(b)] Federal regulations require electronic submittal of all discharge monitoring reports(DMRs)and program reports.The final NPDES Electronic Reporting Rule was adopted and became effective on December 21, 2015. NOTE: This special condition supplements or supersedes the following sections within Part II of this permit (Standard Conditions for NPDES Permits): • Section B. (11.) Signatory Requirements • Section D. (2.) Reporting • Section D. (6.) Records Retention • Section E. (5.) Monitoring Reports 1. Reporting Requirements[Supersedes Section D. (2.)and Section E.(5.)(a)t 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 Page 7 of 9 Permit NC0020940 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). 2. Electronic Submissions In accordance with 40 CFR 122.41(1)(9),the permittee must identify the initial recipient at the time of each electronic submission. The permittee should use the EPA's website resources to identify the initial recipient for the electronic submission. Initial recipient of electronic NPDES information from NPDES-regulated facilities means the entity(EPA or the state authorized by EPA to implement the NPDES program)that is the designated entity for receiving electronic NPDES data [see 40 CFR 127.2(b)]. EPA plans to establish a website that will also link to the appropriate electronic reporting tool for each type of electronic submission and for each state. Instructions on how to access and use the appropriate electronic reporting tool will be available as well. Information on EPA's NPDES Electronic Reporting Rule is found at: https://www.federalregister.gov/documents/2015/10/22/2015-24954/national- pollutant-discharge-elimination-system-npdes-electronic-reporting-rule Electronic submissions must start by the dates listed in the "Reporting Requirements"section above. 3. How to Request a Waiver from Electronic Reporting The permittee may seek a temporary electronic reporting waiver from the Division. To obtain an electronic reporting waiver,a permittee must first submit an electronic reporting waiver request to the Division. Requests for temporary electronic reporting waivers must be submitted in writing to the Division for written approval at least sixty(60)days prior to the date the facility would be required under this permit to begin submitting monitoring data and reports. The duration of a temporary waiver 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. Page 8 of 9 it Permit NC0020940 Information on eDMR and the application for a temporary electronic reporting waiver are found on the following web page: http://deq.nc.gov/about/divisions/water-resources/ed mr 4. Signatory Requirements[Supplements Section B.(11.)(b)and Supersedes Section B.(11.)(d)1 All eDMRs submitted to the permit issuing authority shall be signed by a person described in Part II, Section B. (11.)(a)or by a duly authorized representative of that person as described in Part II,Section B. (11.)(b). A person,and not a position, must be delegated signatory authority for eDMR reporting purposes. ForeDMR submissions,theperson signing and submittingthe DMR must obtain an eDMR user account o g g and login credentials to access the eDMR system. For more information on North Carolina's eDMR system, registering for eDMR and obtaining an eDMR user account, please visit the following web page: http://deq.nc.gov/about/divisions/water-resources/edmr Certification. Any person submitting an electronic DMR using the state's eDMR system shall make the following certification [40 CFR 122.22]. NO OTHER STATEMENTS OF CERTIFICATION WILL BE ACCEPTED: "I certify, under penalty of law, that this document and all attachments were prepared under my direction or supervision in accordance with a system designed to assure that qualified personnel properly gather and evaluate the information submitted. Based on my inquiry of the person or persons who manage the system, or those persons directly responsible for gathering the information, the information submitted is, to the best of my knowledge and belief, true, accurate, and complete. I am aware that there are significant penalties for submitting false information, including the possibility of fines and imprisonment for knowing violations." 5. Records Retention [Supplements Section D.(6.11 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 r l r / 4 ,i,VV g-.—.—.i y7 . \ %. , s-_:_i -"..c-,Cr*.#„.4.„.,. „, i /, M ,_ _t l _ - ,./0.;- "(/',-,,'.---'‘,,,(\._.. .1 (,,,((.iCe.o\I.i r\. ). ° . i4. r \ • ff •I •1 \ e •- , k .emu t + i •. 7 _;41A‘C\IIC;4-. ',. 4. Q s. ' . 4-1/1- ‘11P°7- • .. It /• ' )... .......)(k d _. AIL_ {,),1101,!' , e. 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