Loading...
HomeMy WebLinkAboutWQ0003765_Draft Permit_20230424DocuSign Envelope ID: C97F54CO-01CF-4536-B528-OBD10E8DEA28 ROY COOPER Governor ELIZABETH S. BISER Secretary RICHARD E. ROGERS, JR, Director Mr. Chris Roberson, Town Manager Town of Robersonville P.O. Box 487 Robersonville, North Carolina 27871 Dear Mr. Roberson: NORTH CAROLINA Environmental Quality April 24, 2023 Subject: Draft NPDES Permit Renewal Permit NCO026042 Robersonville WWTP Martin County Grade IV Biological WPCS SIC Code 4952 Enclosed with this letter is a copy of the Draft NPDES permit renewal for your facility. Please review this draft carefully to ensure thorough understanding of the requirements and conditions it contains. There are several changes from the existing permit, including the following: • Based on the facility's receiving industrial wastewater and monitoring requirements under 15A NCAC 02B .0508, effluent Conductivity monitoring has been added to the permit at a daily frequency [See A. (1.)]. • Based on DWR Instream Conductivity Monitoring Guidance, the facility discharges domestic and industrial wastewater, so instream conductivity monitoring has been added to the permit [See A. (1.)]. • Based on the reasonable potential analysis (RPA) showing reasonable potential to violate state water quality standards using recent hardness data, Total Copper limits have been revised [See A. (1.)]. • Based on the RPA predicting a maximum effluent lead concentration that is greater than half of the allowable discharge concentration based on state water quality standards, quarterly monitoring for Total Lead has been added to the permit [See A. (1.)]. • Based on exceedences of parameters related to industrial users, a compliance schedule to reactivate the facility's pretreatment program was added to the permit [See A. (7.)]. • Based on recommendations by EPA guidance on December 5, 2022, quarterly effluent monitoring for PFAS chemicals with a delayed implementation has been added to the permit [See A. (L) and Special Condition A. (8.) PFAS Monitoring Requirements]. • Some of the wording has changed in Special Condition A. (2.), Chronic Toxicity Permit Limit, please review each paragraph carefully. • Special Condition A. (6.) has been modified to include the specific three years in which the Effluent Pollutant Scan shall be performed (2024, 2025, and 2026). North Carolina Department of Environmental Quality I Division of Water Resources 4NORT�HCv 512 North Salisbury Street 1 1611 Mail Service Center I Raleigh, North Carolina 27699-1611 NORTHCAROUNA 919.707.9000 Department ofEnvlronmantal Duali� DocuSign Envelope ID: C97F54CO-01CF-4536-B528-OBD10E8DEA28 A notation was made concerning the Electronic Reporting Rule — NPDES Electronic Reporting Rule — Phase 2 Extension. EPA extended the Phase 2 deadline to December 21, 2025. Federal regulations require electronic submittal of all discharge monitoring reports (DMRs) and program reports. The requirement to continue reporting discharge monitoring data electronically using the NC DWR's Electronic Discharge Monitoring Report (eDMR) internet application has been added to your NPDES permit [See Special Condition A. (9.)]. The NPDES standard conditions (Parts II, III, and IV) that are a part of the permit are not included in this draft document (cover, map, and Part I). The conditions are the same as in your current permit except that agency and division names have been updated. The latest version is available at https://bit.ly/3k5NFaL and can be viewed online or downloaded as a PDF file. Concurrent with this notification the Division is publishing a notice in a newspaper having circulation in the general Martin County area, soliciting public comments on this draft permit. Please provide any written comments you may have to the following: NCDEQ/DWR, NPDES Permitting Branch, 1617 Mail Service Center, Raleigh, NC 27699-1617 no later than 30 days after receipt of this draft permit. Following the 30-day public comment period, the Division will review all pertinent comments and take appropriate action prior to issuing a final permit. If you have questions concerning this draft permit, please call me at (919) 707-3611 or by email at gary.perlmutter@ncdenr.gov. Sincerely, DAoccuu Signed 1b�y:,•.', '^ 9FBBBC952DF8455... Gary Perlmutter, Environmental Specialist II NPDES Municipal Permitting Unit Hardcopy: NPDES Files eCopy: US EPA Region 4 DWR / Washington Regional Office / Water Quality / Robert Tankard DWR / Operator Certification Program / Maureen Kinney DWR / Aquatic Toxicology Branch / Cindy Moore DWR / Municipal Permitting Unit / Keyes McGee Envirolink, Inc. / Josh Powers D E Q�� North Carolina Department of Environmental Quality I Division of Water Resources 512 North Salisbury Street 1 1611 Mail Service Center I Raleigh, North Carolina 27699-1611 NORTH CAROLINA 919.707.9000 Depanmem of Envlmnmenml Dual DocuSign Envelope ID: C97F54CO-01CF-4536-B528-OBD10E8DEA28 Permit NCO026042 STATE OF NORTH CAROLINA DEPARTMENT OF ENVIRONMENTAL QUALITY DIVISION OF WATER RESOURCES TO DISCHARGE WASTEWATER UNDER THE NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM NPDES In compliance with the provisions of North Carolina General Statute 143-215.1, other lawful standards and regulations promulgated and adopted by the North Carolina Environmental Management Commission, and the Federal Water Pollution Control Act, as amended, the Town of Robersonville is hereby authorized to discharge wastewater from a facility located at the Robersonville Wastewater Treatment Plant 1149 Rogerson Road Robersonville, NC 27871 Martin County to receiving waters designated as Flat Swamp in the Tar -Pamlico River Basin in accordance with the effluent limitations, monitoring requirements, and other applicable conditions set forth in Parts I, II, III, and IV hereof. This permit shall become effective Month dd, 20yy. This permit and authorization to discharge shall expire at midnight on November 30, 2027. Signed this day Month dd, 20yy. DRAFT for Richard E. Rogers, Jr., Director Division of Water Resources By Authority of the Environmental Management Commission Page 1 of 15 DocuSign Envelope ID: C97F54CO-01CF-4536-B528-OBD10E8DEA28 Permit NCO026042 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. Town of Robersonville is hereby authorized to: 1. Continue to operate and maintain the wastewater treatment works identified on the Cover, an existing 1.8 MGD facility consisting of the following components: • Mechanical bar screen • Influent pump station • Aerated Grit Chamber • Two (2) 2-stage aerobic selector tanks • Two (2) anoxic tanks • Aeration tanks (Dual oxidation ditches) • Internal recycle pumps from oxidation ditches to anoxic tanks • Six (6) secondary clarifiers • Aqua Aerobic Disc Filter • Three (3) chlorine contact chambers • Dechlorination • Post aeration system • Aerated sludge digester and holding tank 2. Discharge from said treatment works at the location specified on the attached map via Outfall 001 into Flat Swamp, classified C, Sw, NSW waters in the Tar -Pamlico River Basin and 03020103 HUC. Page 2 of 15 DocuSign Envelope ID: C97F54CO-01CF-4536-B528-OBD10E8DEA28 Permit NCO026042 PART A.(1.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS [1.8 MGD] [15A NCAC 02B .0400 et seq., 15A NCACO2B .0500 et seq.] Grade IV Biological Water Pollution Control System [15A NCAC 08G .0302] (a.) During the period beginning on the effective date of the permit and lasting until permit expiration, the Permittee is authorized to discharge treated municipal and industrial wastewater from Outfall 001. Such discharges shall be limited and monitored' by the Permittee as specified below: PARAMETER Parameter Code EFFLUENT LIMITS MONITORING REQUIREMENTS Monthly Average Weekly Average Daily Maximum Measurement Frequency Sample Type Sample Location 2 Flow 50050 1.8 MGD Continuous Recording I or E Total Monthly Flow, MG 82220 Monitor and Report Monthly Calculated E BOD, 5 day, 200C 3 C0310 5.0 mg/L 7.5 mg/L Daily Composite I and E Total Suspended Solids 3 C0530 30.0 mg/L 45.0 mg/L Daily Composite I and E NH3 as N C0610 1.1 mg/L 3.3 mg/L Daily Composite E Dissolved Oxygen 00300 Daily Average > 6.0 mg/L Daily Grab E Fecal Coliform 31616 (geometric mean) 200/100 mL 400/100 mL Daily, Grab E Total Residual Chlorine 4 50060 19 µg/L Daily Grab E pH 00400 Between 6.0 and 9.0 Standard Units Daily Grab E Temperature, °C 00010 Monitor and Report Daily Grab E Conductivity, µmhos/cm 00094 Monitor and Report Daily Grab E TKN, mg/L 00625 Monitor and Report Weekly Composite E NO3-N + NO2-N, mg/L 00630 Monitor and Report Weekly Composite E Total Nitrogen (TN) 5, mg/L C0600 Monitor and Report Weekly Calculated E s � QM600 TN Load QY600 Monitor and Report (lb/month) 25,671 lb/yr Monthly Annually Calculated E Total Phosphorus (TP) 5, mg/L C0665 Monitor and Report Weekly Composite E s � QM600 TP Load QY600 Monitor and Report (lb/month) 4639 lb/yr Monthly Annually Calculated E Total Hardness (as CaCO3) a, 00900 mg/L Monitor and Report Quarterly Composite E Total Copper 01042 9.8 µg/L 13.0 µg/L Monthly Composite E Total Lead 01051 Monitor and Report Quarterly Composite E Chronic Toxicity 9 TGP3B Monitor and Report Quarterly Composite E Effluent Pollutant Scan 10 NCO] Monitor and Report Footnote 10 Footnote 10 E PFAS I1 Various Monitor and Report Quarterly Grab E Total Hardness (as CaCO3) 12, 00900 mg/L Monitor and Report Quarterly Grab U Dissolved Oxygen, mg/L 00300 Monitor and Report Variable2 Grab U and D Temperature, °C 00010 Monitor and Report Variable2 Grab U and D Conductivity, µmhos/cm 00094 Monitor and Report Variable2 Grab U and D Footnotes: 1. The Permittee shall submit Discharge Monitoring Reports electronically using NC DWR's eDMR application system. See Special Condition A. (9). Page 3 of 15 DocuSign Envelope ID: C97F54CO-01CF-4536-B528-OBD10E8DEA28 Permit NCO026042 Footnotes (continued 2. Sample locations: I = Influent, E = Effluent, U = Upstream at NCSR 1158 (3`d Street), D = Downstream at NCSR 1505 (Flat Swamp Church Rd). Upstream and downstream samples shall be grab samples collected 3/week during June, July, August, and September and 1/week during the remainder of the year. Instream sampling requirements are provisionally waived in light of the Permittee's participation in the Tar -Pamlico River Basin Association. Should participation in the association cease, all instream sampling requirements are immediately reinstated. 3. The monthly average effluent BOD5 and Total Suspended Solids concentrations shall not exceed 15% of the respective influent value (85% removal). 4. The facility shall monitor TRC when using chlorination for disinfection. The Division shall consider all effluent total residual chlorine values reported below 50 µg/1 to be in compliance with the permit. However, the permittee shall continue to record and submit all values reported by a North Carolina certified laboratory (including field certified), even if these values fall below 50 µg/1. 5. For a given wastewater sample, TN = TKN + NO3-N + NO2-N, where TN is Total Nitrogen, TKN is Total Kjeldahl Nitrogen, and NO3-N and NO2-N are Nitrate and Nitrite Nitrogen, respectively. 6. TN Load is the mass load of TN discharged by the permittee in a period of time. See Special Condition A.(3.). 7. Compliance with these limits shall be determined in accordance with Special Condition A.(4.), Annual Limits for Total Nitrogen and Total Phosphorus. 8. The Permittee shall sample instream hardness upstream of the facility's discharge. The sample shall be representative of the hardness in the stream. Effluent hardness shall be performed in conjunction with testing for hardness dependent metals (cadmium, copper, lead, nickel, silver, and zinc). 9. Chronic Toxicity (Ceriodaphnia dubia) P/F at 90% with testing in February, May, August, and November. See Special Condition A. (2.). 10. The permittee shall perform three effluent pollution scans during the term of this permit. See Special Condition A. (6.). 11. See Special Condition A. (8.). (b.) There shall be no discharge of floating solids or visible foam in other than trace amounts. Page 4 of 15 DocuSign Envelope ID: C97F54CO-01CF-4536-B528-OBD10E8DEA28 Permit NCO026042 A.(2.) CHRONIC TOXICITY PERMIT LIMIT (QUARTERLY) [ 15A NCAC 02B .0200] [ 15A NCAC 02B .0500 et seq] The effluent discharge shall at no time exhibit observable inhibition of reproduction or significant mortality to Ceriodaphnia dubia at an effluent concentration of 90%. The permit holder shall perform at a minimum, quarterly monitoring using test procedures outlined in the "North Carolina Ceriodaphnia Chronic Effluent Bioassay Procedure," (Revised December 2010, or subsequent versions) or "North Carolina Phase II Chronic Whole Effluent Toxicity Test Procedure" (Revised December 2010, or subsequent versions). The tests will be performed during the months of February, May, August, and November. These months signify the first month of each three-month toxicity testing quarter assigned to the facility. Effluent sampling for this testing must be obtained during representative effluent discharge and shall be performed at the NPDES permitted final effluent discharge below all treatment processes. If the test procedure performed as the first test of any single quarter results in a failure or ChV below the permit limit, then multiple -concentration testing shall be performed at a minimum, in each of the two following months as described in "North Carolina Phase II Chronic Whole Effluent Toxicity Test Procedure" (Revised -December 2010, or subsequent versions). All toxicity testing results required as part of this permit condition will be entered electronically using the Division's eDMR system for the months in which tests were performed, using the parameter code TGP3B for the pass/fail results and THP311 for the Chronic Value. Additionally, DWR Form AT-3 (original) is to be sent to the following address: North Carolina Division of Water Resources Water Sciences Section/Aquatic Toxicology Branch 1621 Mail Service Center Raleigh, NC 27699-1621 Or, results can be sent to the email, ATForms.ATB@ncdenr.gov. Completed Aquatic Toxicity Test Forms shall be filed with the Water Sciences Section no later than 30 days after the end of the reporting period for which the report is made. Test data shall be complete, accurate, include all supporting chemical/physical measurements and all concentration/response data, and be certified by laboratory supervisor and ORC or approved designate signature. Total residual chlorine of the effluent toxicity sample must be measured and reported if chlorine is employed for disinfection of the waste stream. Should there be no discharge of flow from the facility during a month in which toxicity monitoring is required, the permittee will complete the information located at the top of the aquatic toxicity (AT) test form indicating the facility name, permit number, pipe number, county, and the month/year of the report with the notation of "No Flow" in the comment area of the form. The report shall be submitted to the Water Sciences Section at the address cited above. Should the permittee fail to monitor during a month in which toxicity monitoring is required, monitoring will be required during the following month. Assessment of toxicity compliance is based on the toxicity testing quarter, which is the three-month time interval that begins on the first day of the month in which toxicity testing is required by this permit and continues until the final day of the third month. Page 5 of 15 DocuSign Envelope ID: C97F54CO-01CF-4536-B528-OBD10E8DEA28 Permit NCO026042 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. A.(3.) CALCULATION AND REPORTING OF TOTAL NITROGEN AND TOTAL PHOSPHORUS LOADS — TAR-PAMLICO [NCGS 143-125.1(b)] (a.) The Permittee shall calculate and report monthly and annual TN (or TP) Loads as follows: (i.) Monthly TN (or TP) Load (lb/mo) = TN (or TP) X TMF X 8.34 where: TN (or TP) = the average Total Nitrogen (or Total Phosphorus) concentration (mg/L) of the composite samples collected during the month TMF = the Total Monthly Flow of wastewater discharged during the month (MG/mo) 8.34 = conversion factor, from (mg/L x MG) to pounds (ii.) Annual TN (or TP) Load (lb/yr) = Sum of the 12 Monthly TN (or TP) Loads for the calendar year The Permittee shall report monthly Total Nitrogen and Total Phosphorus results (mg/L and lb/mo) in the appropriate discharge monitoring report for each month and shall report each calendar year's results (lb/yr) with the December report for that year. Page 6 of 15 DocuSign Envelope ID: C97F54CO-01CF-4536-B528-OBD10E8DEA28 Permit NCO026042 A.(4.) ANNUAL NUTRIENT LIMITS — TAR-PAMLICO [NCGS 143-125.1(b)] (a.) Total Nitrogen (TN) and Total Phosphorus (TP) allocations and load limits for NPDES dischargers in the Tar -Pamlico River basin are annual values and apply on a calendar year basis. (b.) For any given calendar year, the Permittee shall be in compliance with the annual TN (or TP) Load limit in this Permit if: (i.) the Permittee's annual TN (or TP) Load is less than or equal to the effective limit, or (ii.) the Permittee is a co-permittee Member of a compliance association. (c.) If the permittee is not a co-permittee member of a compliance association and the permittee's cumulative annual TN (or TP) discharge exceeds the effective TN (or TP) Load limit in this permit at any point during the calendar year, the permittee is in violation of its TN (or TP) Load limit, and each day of a continuing violation shall constitute a separate violation. (d.) The TN (or TP) Load limit in this Permit may be modified as the result of allowable changes in the Permittee's allocations. (i.) Allowable changes include those resulting from purchase of TN (or TP) allocation from an authorized mitigation banker, the Ecosystem Enhancement Program, or other source allowed under applicable regulations; purchase, sale, trade, or lease of allocation between the Permittee and other dischargers; regionalization; and other transactions approved by the Division and consistent with the Tar -Pamlico River Basin Association Agreement, as revised. (ii.) The Permittee may request a modification of the TN (or TP) Load limit in this Permit to reflect allowable changes in its allocation(s). Upon receipt of timely and proper application, the Division will modify the permit as appropriate and in accordance with state and federal program requirements. (iii.) Changes in TN (or TP) limits become effective on January 1 of the year following permit modification. The Division must receive application no later than August 31 for changes proposed for the following calendar year. (iv.) Any requests for modification should be sent to: NCDEQ / DWR / NPDES Wastewater Program Attn: Tar -Pamlico River Basin Coordinator 1617 Mail Service Center Raleigh, NC 27699-1617 (e.) If the Permittee is a member and co-permittee of an approved compliance association on January 1 of a given year, its TN and TP discharges during that year are governed by that association's group NPDES permit and the limits therein. (i.) The Permittee shall be considered a co-permittee Member for any given calendar year in which it is identified as such in Appendix A of the association's group NPDES permit. (ii.) Association roster(s) and members' TN and TP allocations will be updated annually and in accordance with state and federal program requirements. (iii.) If the Permittee intends to join or leave a compliance association, the Division must be notified of the proposed action in accordance with the procedures defined in the association's NPDES permit. (A) Upon receipt of timely and proper notification, the Division will modify the permit as appropriate and in accordance with state and federal program requirements. (B) Membership changes in a compliance association become effective on January 1 of the year following modification of the association's permit. The TN and TP monitoring and reporting requirements in this Permit remain in effect throughout the term of the Permit and are not affected by the Permittee's membership in a compliance association. Page 7 of 15 DocuSign Envelope ID: C97F54CO-01CF-4536-B528-OBD10E8DEA28 Permit NCO026042 A. (5.) TOTAL NITROGEN AND TOTAL PHOSPHORUS ALLOCATIONS — TAR-PAMLICO [NCGS 143-215.1(b)] (a.) Total Nitrogen (TN) and Total Phosphorus (TP) allocations represent the maximum TN and TP loads that a discharger or group of dischargers is potentially allowed under the Tar -Pamlico nutrient management strategy. Allocations are not enforceable limits but are the basis for TN and TP limits established in individual or group NPDES permits. (b.) The allocations originally assigned to the Tar -Pamlico Basin Association members total 891,271 pounds/year (404,274 kg/year) TN and 161,070 pounds/year (73,060 kg/year) TP. These group allocations have been divided among the members in proportion to the maximum permitted flow in each member's permit; that is, Individual Permitted Flow (MGD) Individual Allocation (TN or TP) = Total Permitted Flow, TPBA (MGD) x Group Allocation, TPBA (TN or TP) (c.) The following table lists, for information purposes only, the TN and TP allocations assigned to, acquired by, or transferred to the Permittee in accordance with the Tar -Pamlico River Basin Phase IV Agreement. Applicable TN or TP limits are established in the Effluent Limitations conditions of this permit or in the NPDES permit of a compliance association of which the Permittee is a Co- Permittee Member. ALLOCATION ALLOCATION AMOUNT TYPE SOURCE DATE STATUS (Ib/yr) (kg/yr) Total Nitrogen Tar -Pamlico River Basin 7/9/2015 25,671 11,644 Active Phase IV Agreement Total Phosphorus Tar -Pamlico River Basin 7/9/2015 4,639 2,104 Active Phase IV Agreement (d.) Any addition, deletion, or modification of the listed allocation(s) (other than to correct typographical errors) or any change from Reserve to Active status of any of the listed allocations shall be considered a major modification of this permit and shall be subject to the public review process afforded such modifications under state and federal rules. Page 8 of 15 DocuSign Envelope ID: C97F54CO-01CF-4536-B528-OBD10E8DEA28 Permit NCO026042 A.(6.) ADDITIONAL MONITORING REQUIREMENTS FOR PERMIT RENEWAL [NCGS 143-215.1(b)] (a.) Effluent Pollutant Scans. The Permittee shall perform a total of three (3) Effluent Pollutant Scans for all parameters listed below. One scan must be performed in each of the following years: 2024, 2025, and 2026. Analytical methods shall be in accordance with 40 CFR Part 136 and shall be sufficiently sensitive to determine whether parameters are present in concentrations greater than applicable standards and criteria. Each annual sample shall coincide with one quarterly toxicity test each year (See Condition A. (2.) CHRONIC TOXICITY PERMIT LIMIT) and each must be collected in a different calendar quarter to represent seasonal variation [i.e., do not sample in the same quarter every year]. Unless otherwise indicated, metals shall be analyzed as "total recoverable." Ammonia (as N) C0610 Trans-1,2-dichloroethylene 34546 Bis (2-chloroethyl) ether 34273 Chlorine (total residual, TRC) 50060 1, 1 -dichloroethylene 34501 Bis (2-chloroisopropyl) ether 34283 Dissolved oxygen 00300 1,2-dichloropropane C0541 Bis (2-ethylhexyl) phthalate C0100 Nitrate/ Nitrite 00630 1,3-dichloropropylene 77163 4-bromophenyl phenyl ether 34636 Kjeldahl nitrogen 00625 Ethylbenzene 34371 Butyl benzyl phthalate 34292 Oil and grease 00556 Methyl bromide 34413 2-chloronaphthalene 34581 Phosphorus C0665 Methyl chloride 34418 4-chlorophenyl phenyl ether 34641 Total dissolved solids 70295 Methylene chloride 34423 Chrysene 34320 Hardness 00900 1,1,2,2-tetrachloroethane 81549 Di-n-butyl phthalate 39110 Antimony 01097 Tetrachloroethylene 34475 Di-n-octyl phthalate 34596 Arsenic 01002 Toluene 34010 Dibenzo(a,h)anthracene 34556 Beryllium 01012 1, 1, 1 -trichloroethane 34506 1,2-dichlorobenzene 34536 Cadmium 01027 1,1,2-trichloroethane 34511 1,3-dichlorobenzene 34566 Chromium C0034 Trichloroethylene 39180 1,4-dichlorobenzene 34571 Copper 01042 Vinyl chloride 39175 3,3-dichlorobenzidine 34631 Lead 01051 Acid -extractable compounds: Diethyl phthalate 34336 Mercury (Method 1631E) COMER P-chloro-m-cresol 34452 Dimethyl phthalate 34341 Nickel 01067 2-chlorophenol 34586 2,4-dinitrotoluene 34611 Selenium 01147 2,4-dichlorophenol 34601 2,6-dinitrotoluene C0626 Silver(PQL < 1 ug/L) 01077 2,4-dimethylphenol 34606 1,2-diphenylhydrazine 34346 Thallium 01059 4,6-dinitro-o-cresol 34657 Fluoranthene C0376 Zinc 01092 2,4-dinitrophenol 34616 Fluorene 34381 Cyanide 00720 2-nitrophenol 34591 Hexachlorobenzene C0700 Total phenolic compounds 32730 4-nitrophenol 34646 Hexachlorobutadiene C0702 Volatile organic compounds: Pentachlorophenol 39032 Hexachlorocyclo-pentadiene 34386 Acrolein 34210 Phenol 34694 Hexachloroethane 34396 Acrylonitrile 34215 2,4,6-trichlorophenol 34621 Indeno(1,2,3-cd)pyrene 34403 Benzene 34030 Base -neutral compounds: Isophorone 34408 Bromoform 32104 Acenaphthene 34205 Naphthalene 34696 Carbon tetrachloride 32102 Acenaphthylene 34200 Nitrobenzene 34447 Chlorobenzene 34301 Anthracene CO220 N-nitrosodi-n-propylamine 34428 Chlorodibromomethane 34306 Benzidine 39120 N-nitrosodimethylamine 34438 Chloroethane 85811 Benzo(a)anthracene C0526 N-nitrosodiphenylamine 34433 2-chloroethyl vinyl ether 34576 Benzo(a)pyrene 34247 Phenanthrene 34461 Chloroform 32106 3,4 benzofluoranthene 34230 Pyrene 34469 Dichlorobromomethane 32101 Benzo(ghi)perylene 34521 1,2,4-trichlorobenzene C0551 1, 1 -dichloroethane 34496 Benzo(k)fluoranthene 34242 1,2-dichloroethane 32103 Bis (2-chloroethoxy) methane 34278 Page 9 of 15 DocuSign Envelope ID: C97F54CO-01CF-4536-B528-OBD10E8DEA28 Permit NC0026042 (b.) Effluent Scan Reporting. Test results shall be reported electronically via eDMR by December 31 st of each designated sampling year, except that, subject to prior written approval by the Director, results can be reported on DWR Form DMR-PPA-1 or other form approved by the Director. The permittee must at least report completion of the test in the eDMR system by entering "1" or "Y" for parameter code NCO 1 - Annual Pollutant Scan. If written reports are approved, the report shall be submitted to the following address: North Carolina Division of Water Resources Central Files 1617 Mail Service Center Raleigh, North Carolina 27699-1617 Or the form may be uploaded at: https:Hedocs.deq.nc.gov/Forms/NPDES_WW-EDMR- Supplemental-Form (c.) 2nd-Species Toxicity Testing and Reporting. (i.) In addition to the quarterly toxicity tests required in Condition A. (2.) CHRONIC TOXICITY PERMIT LIMIT, the Permittee shall perform and report the results of four (4) toxicity tests using the same test methods using a second species of test organism suitable to the tests being conducted. (ii.) The 2nd species toxicity tests shall be conducted either: (A) Once per quarter in a single 12-month period (four samples); if this option is chosen, the sample for each 2nd species test shall coincide with the quarterly samples collected for (tox condition title); or (B) Once per 12-month period in the four -and one-half year period prior to the scheduled application for permit renewal (four samples); if this option is chosen, three of the sample for the 2nd species test shall coincide with those for the annual effluent scans and the coincident quarterly toxicity test, and each of the four annual samples shall be collected in a different calendar quarter in order to represent seasonal variation. (iii.) The results of the toxicity tests shall be submitted to the following address: North Carolina Division of Water Resources Water Sciences Section/Aquatic Toxicology Branch 1621 Mail Service Center Raleigh, North Carolina 27699-1621 Or, results can be sent to the email, ATForms.ATB@ncdenr.gov. (iv.) Results of the 2nd species tests shall also be summarized in Part E (Toxicity Testing Data) of EPA Municipal Application Form 2A when submitting the permit renewal application to the NPDES Wastewater Program. The Permittee may contact the Division's Aquatic Toxicology Branch at 919-743-8401 for guidance on conducting the additional toxicity tests and reporting of the results. Page 10 of 15 DocuSign Envelope ID: C97F54CO-01CF-4536-B528-OBD10E8DEA28 Permit NCO026042 A. (7.) SCHEDULE OF COMPLIANCE FOR REINSTATEMENT OF PRETREATMENT PROGRAM [G.S. 143 -215. 1 (b)] a) Within one (1) month of the effective date of the permit the permittee shall submit to the Division a Short -Term Monitoring Plan (STMP). b) Within one (1) month of the effective date of the permit the permittee shall begin implementation of the STMP. Monitoring shall take place for one year, and all data shall be submitted to the Division within 15 months of the start of data collection. c) Within three (3) months of the effective date of the permit the permittee shall submit to the Division a Sewer Use Ordinance (SUO) & Enforcement Response Plan (ERP). d) Within six (6) months of the effective date of the permit the permittee shall submit to the Division an Industrial Waste Survey (IWS). e) Within fifteen (15) months of the effective date of the permit the permittee shall submit to the Division a completed design -based Headworks Analysis (HWA) for development of local permit limits for Significant Industrial User(s) (SIUs). f) Within fifteen (15) months of the effective date of the permit the permittee shall issue local Industrial User Permit(s) (IUPs) (using the limits allocations from the HWA). g) Within eighteen (18) months of the effective date of the permit the permittee shall submit all documents necessary to reinstate a pretreatment program per 15A NCAC 02H .0906. A. (8.) PFAS MONITORING REQUIREMENT [NCGS 143-215.1(b)] This reporting requirement for the per- and polyfluoroalkyl substances (PFAS) parameters listed under Table 1 of the Final Method 1633 takes effect the first full calendar quarter following six (6) months after EPA publishes a 40 CFR Part 136 Final PFAS Method for wastewater in the Federal Register. Monitoring will be at a quarterly frequency. Find the current parameters listed under Table 1 of the 3rd Draft Method 1633 Analysis of Per- and Polyfluoroalkyl Substances (PFAS) in Aqueous, Solid, Biosolids, and Tissue Samples by LC-MS/MS at: hops: //www. epa. gov/system/files/documents/2022- 12/3rd%20Draft%20Method%201633%20December%202022%2012-20-22_508.pdf Page 11 of 15 DocuSign Envelope ID: C97F54CO-01CF-4536-B528-OBD10E8DEA28 Permit NCO026042 A.(9.) ELECTRONIC REPORTING - DISCHARGE MONITORING REPORTS [NCGS 143-215.1 (b)] Federal regulations require electronic submittal of all discharge monitoring reports (DMRs) and program reports. The final NPDES Electronic Reporting Rule was adopted and became effective on December 21, 2015. NOTE: This special condition supplements or supersedes the following sections within Part II of this permit (Standard Conditions for NPDES Permits): • Section B. (11.) Signatory Requirements • Section D. (2.) • Section D. (6.) • Section E. (5.) Reporting Records Retention Monitoring Reports 1. Reporting Requirements [Supersedes Section D. (2.) and Section E. (5.) (a)1 The permittee shall report discharge monitoring data electronically using the NC DWR's Electronic Discharge Monitoring Report (eDMR) internet application. Monitoring results obtained during the previous month(s) shall be summarized for each month and submitted monthly electronically using eDMR. The eDMR system allows permitted facilities to enter monitoring data and submit DMRs electronically using the internet. The eDMR system may be accessed at: https://deq.nc.gov/about/divisions/water-resources/edmr. If a permittee is unable to use the eDMR system due to a demonstrated hardship or due to the facility being physically located in an area where less than 10 percent of the households have broadband access, then a temporary waiver from the NPDES electronic reporting requirements may be granted and discharge monitoring data may be submitted on paper DMR forms (MR 1, 1. 1, 2, 3) or alternative forms approved by the Director. Duplicate signed copies shall be submitted to the following address: NC DEQ / Division of Water Resources / Water Quality Permitting Section ATTENTION: Central Files 1617 Mail Service Center Raleigh, North Carolina 27699-1617 See "How to Request a Waiver from Electronic Reporting" section below. Monitoring results obtained during the previous month(s) shall be summarized for each month and reported via the eDMR system no later than the last calendar day of the month following the completed reporting period. Regardless of the submission method, the first DMR is due on the last day of the month following the issuance of the permit or in the case of a new facility, on the last day of the month following the commencement of discharge. Starting on December 21, 2025, the permittee must electronically report the following compliance monitoring data and reports, when applicable: Sewer Overflow/Bypass Event Reports; and Pretreatment Program Annual Reports; and Clean Water Act (CWA) Section 316(b) Annual Reports. Page 12 of 15 DocuSign Envelope ID: C97F54CO-01CF-4536-B528-OBD10E8DEA28 Permit NCO026042 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. Information on eDMR and the application for a temporary electronic reporting waiver are found on the following web page: http://deq.nc.gov/about/divisions/water-resources/edmr 4. Signatory Requirements [Supplements Section B. (11.) (b) and Supersedes Section B. (11.) (d)1 All eDMRs submitted to the permit issuing authority shall be signed by a person described in Part II, Section B. (11.)(a) or by a duly authorized representative of that person as described in Part II, Section B. (11.)(b). A person, and not a position, must be delegated signatory authority for eDMR reporting purposes. For eDMR submissions, the person signing and submitting the DMR must obtain an eDMR user account and login credentials to access the eDMR system. For more information on North Carolina's eDMR system, registering for eDMR and obtaining an eDMR user account, please visit the following web page: http://deq.nc.gov/about/divisions/water-resources/edmr Page 13 of 15 DocuSign Envelope ID: C97F54CO-01CF-4536-B528-OBD10E8DEA28 Permit NCO026042 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 [Suuulements Section D. (6.)] The permittee shall retain records of all Discharge Monitoring Reports, including eDMR submissions. These records or copies shall be maintained for a period of at least 3 years from the date of the report. This period may be extended by request of the Director at any time [40 CFR 122.41]. Page 14 of 15 DocuSign Envelope ID: C97F54CO-01CF-4536-B528-OBD10E8DEA28 ILI- -_'7, *ben RobetsonviUe ! �. S I WWTP and Outfall001 — i Permit NCO026042 a� ti 4 R7F0� ' I CO = 1— R-k H,2. 1 :aq ' ~. / ✓ �� Town of Robersonville - NCO026042 Facility • Location USGS Quad Name: Robersonville West Lat.: 35°48'40" Receiving Stream: Flat Swamp Lang.: 77°15'30" Stream Class: C-Sw NSW 8-Digit HUC: Subbasin: Tar Pamlico — 03 03 06 03020103 NorthSCALE 1:24,000 Page 15 of 15