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HomeMy WebLinkAboutNC0025879_DRAFT v3 box- 06Sep2022_20220906Permit NC0025879 Page 1 of 7 STATE OF NORTH CAROLINA DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES DIVISION OF WATER RESOURCES PERMIT TO DISCHARGE WASTEWATER UNDER THE NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM (NPDES) 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 Robbinsville is hereby authorized to discharge wastewater from a facility located at the Town of Robbinsville Sewer Plant (existing) SW Corner of Old Hwy 129 and Knight Street (proposed) Sandhole Road Graham County to receiving waters designated as Long Creek (existing) and Cheoah River (proposed) within the Little Tennessee River Basin in accordance with effluent limitations, monitoring requirements, and other conditions set forth in Parts I, II, III and IV hereof. This permit shall become effective ____________, 2022. This permit and authorization to discharge shall expire at midnight on November 30, 2027. Signed this day _______________, 2022. _____________________________________________ for Richard E. Rogers, Jr., Director Division of Water Resources By Authority of the Environmental Management Commission Permit NC0025879 Page 2 of 7 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 Robbinsville is hereby authorized to: 1. continue to operate an existing 0.630 MGD wastewater treatment facility utilizing: • mechanical bar screen • influent pump station • splitter device [divides flow 0.315/0.315 MGD] • two (2) each anoxic basins (in parallel) • two (2) each anaerobic basins (in parallel) • two (2) each post-anoxic basins (in parallel) • two (2) each clarifiers (in parallel) • aerated sludge holding basin w/ sludge pump, belt filter press, and lime feed • two (2) each post-clarifier liquid filters (in parallel) • UV disinfection • continuous flow measurement flume • appurtenant piping to Outfall 001 these facilities located at the Town of Robbinsville Sewer Plant, SW corner of Old HWY 129 and Knight Street, Robbinsville, and discharge from said treatment works via Outfall 001, as located on the attached map, into Long Creek [stream segment 2-190-4-(5)], a waterbody currently classified C; Trout within hydrological unit 04- 04-04 [HUC: 060102040106] of the Little Tennessee River Basin, and 2. after submitting to DWR a request to expand wastewater treatment facilities, and after receiving DWR’s Authorization to Construct permit, and after submitting an Engineer’s Certification Form confirming that new facilities have been constructed in accord with this permit and said Authorization to Construct, then 3. discharge via relocated Outfall 001, as identified on the attached map, into the Cheoah River [stream index 2-190-4-(5)], a waterbody currently classified C; Trout within hydrological unit 04-04-04 [HUC: 060102040106] of the Little Tennessee River Basin. Permit NC0025879 Page 3 of 7 Part I A. (1.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS [15A NCAC 02B .0400 et seq., 02B .0500 et seq.; WPCS Grade WW-III, 15A NCAC 08G .0302] Beginning on the effective date and lasting until DWR approval of flow expansion, the Permittee is authorized to discharge via Outfall 001 into Long Creek. Such discharge shall be limited, monitored, and reported 1 by the Permittee as specified below: EFFLUENT CHARACTERISTICS PCS Codes LIMITS MONITORING REQUIREMENTS Monthly Average Weekly Average Daily Maximum Measurement Frequency Sample Type Sample Location2 Flow 50050 0.630 MGD Continuous Recording I or E Total Suspended Solids 3 CO530 30.0 mg/L 45.0 mg/L 3/Week Composite I & E BOD, 5-day (20ºC)3 CO310 5.0 mg/L 7.5 mg/L 3/Week Composite I & E pH [Standard Units] 00400 Not < 6.0 or > 9.0 s.u. 3/Week Grab E Total Residual Chlorine 4 50060 28 ug/L5 3/Week Grab E Fecal Coliform (Geometric mean) 31616 200/100 mL 400/100 mL 3/Week Grab E Turbidity 00070 Monitor and Report Weekly Grab U & D Dissolved Oxygen 00300 Monitor and Report Weekly Grab U & D Temperature (⁰C) 6 00010 Monitor and Report 6 Weekly Grab U & D Ammonia (NH3 as N) [01Apr – 31Oct] CO610 2.0 mg/L 6.0 mg/L Weekly Composite E Ammonia (NH3 as N) [01Nov – 31Mar] CO610 4.0 mg/L 12.0 mg/L Weekly Composite E Total Nitrogen (TN)7 [NO2+NO3+TKN] CO600 45.2 lbs/day Annual average 7 Monthly Composite E Total Phosphorus (TP)7 CO655 3.8 lbs/day Annual average 7 Monthly Composite E Total Mercury8 COMER Monitor and Report 8 Once (1) per Permit Cycle Grab 8 E Footnotes: 1. Beginning on the effective date of this permit, the Permittee shall submit discharge monitoring reports electronically using NC DWR’s eDMR application system [See Special Condition A. (3.)]. 2. Sample Locations: E - Effluent, I – Influent. U = Upstream; D = Downstream (minimum 100 feet below the outfall) 3. The monthly average effluent BOD-5 and Total Suspended Solids concentrations shall not exceed 15% of the respective influent value (i.e., 85 % removal required). 4. Total Residual Chlorine (TRC) limits and monitoring apply only if chlorine is added to the waste stream during treatment processes. 5. The Division shall consider compliant all effluent TRC values reported below 50 μg/L. However, the Permittee shall continue to record and submit all values reported by North Carolina-certified test methods (including field certified), even if these values are reported below 50 μg/L. Permit NC0025879 Page 4 of 7 6. Trout Waters: Effluent, by discharge of heated liquids, shall not increase receiving-stream temperature by more than 0.5 degrees C (0.9 degrees F); in no case shall effluent cause instream to exceed 20 degrees C (68 degrees F). If receiving-stream background naturally exceed 20 degrees C, effluent shall NOT increase instream temperatures. 7. TN/TP Annual Average shall reflect the average of composite samples collected Monthly during each calendar year. 8. Total Mercury shall be monitored using EPA Method 1631E [See Special Condition A. (5.)]. This sample shall be collected during the Permittee’s last reporting year, and the results submitted with the Application to Renew this permit. Condition: The Permittee shall discharge no floating solids or foam visible in other than trace amounts. A. (2.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS Upon receipt of a DWR approved Authorization to Construct permit and after submitting and receiving approval of an Engineering Certification Form for flow expansion to the Cheoah River, the Permittee is authorized to discharge via relocated Outfall 001. Such discharge shall be limited, monitored, and reported 1 by the Permittee as specified below: EFFLUENT CHARACTERISTICS PCS Codes LIMITS MONITORING REQUIREMENTS Monthly Average Weekly Average Daily Maximum Measurement Frequency Sample Type Sample Location2 Flow 50050 0.850 MGD Continuous Recording I or E Total Suspended Solids 3 CO530 30.0 mg/L 45.0 mg/L 3/Week Composite I & E BOD, 5-day (20ºC)3 CO310 5.0 mg/L 7.5 mg/L 3/Week Composite I & E pH [Standard Units] 00400 Not < 6.0 or > 9.0 s.u. 3/Week Grab E Total Residual Chlorine 4 50060 28 ug/L5 3/Week Grab E Fecal Coliform (Geometric mean) 31616 200/100 mL 400/100 mL 3/Week Grab E Turbidity 00070 Monitor and Report Weekly Grab U & D Dissolved Oxygen 00300 Monitor and Report Weekly Grab U & D Temperature (⁰C) 6 00010 Monitor and Report 6 Weekly Grab U & D Ammonia (NH3 as N) [01Apr – 31Oct] CO610 1.0 mg/L 3.0 mg/L Weekly Composite E Ammonia (NH3 as N) [01Nov – 31Mar] CO610 2.0 mg/L 6.0 mg/L Weekly Composite E Total Nitrogen (TN)7 [NO2+NO3+TKN] CO600 45.2 lbs/day Annual average 7 Monthly Composite E Total Phosphorus (TP)7 CO655 8.8 lbs/day Annual average 7 Monthly Composite E Total Mercury 8 COMER Monitor and Report 8 Once (1) per Permit Cycle Grab 8 E Footnotes: 1. Beginning on the effective date of this permit, the Permittee shall submit discharge monitoring reports electronically using NC DWR’s eDMR application system [See Special Condition A. (3.)]. Permit NC0025879 Page 5 of 7 2. Sample Locations: E - Effluent, I – Influent. U = Upstream; D = Downstream (minimum 100 feet below the outfall) 3. The monthly average effluent BOD-5 and Total Suspended Solids concentrations shall not exceed 15% of the respective influent value (i.e., 85 % removal required). 4. Total Residual Chlorine (TRC) limits and monitoring apply only if chlorine is added to the waste stream during treatment processes. 5. The Division shall consider compliant all effluent TRC values reported below 50 μg/L. However, the Permittee shall continue to record and submit all values reported by North Carolina certified test methods (including field certified), even if these values are reported below 50 μg/L. 6. Trout Waters: Effluent, by discharge of heated liquids, shall not increase receiving-stream temperature by more than 0.5 degrees C (0.9 degrees F); in no case shall effluent cause instream to exceed 20 degrees C (68 degrees F). If receiving-stream background naturally exceed 20 degrees C, effluent shall NOT increase instream temperatures 7. TN/TP Annual Average shall reflect the average of composite samples collected Monthly during each calendar year. 8. Total Mercury shall be monitored using EPA Method 1631E [See Special Condition A. (5.)]. This sample shall be collected during the Permittee’s last reporting year, and the results submitted with the Application to Renew. Condition: The Permittee shall discharge no floating solids or foam visible in other than trace amounts. A. (3.) ELECTRONIC REPORTING OF DISCHARGE 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)] 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 Permit NC0025879 Page 6 of 7 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(l)(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 Permit NC0025879 Page 7 of 7 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)] 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 Certification. Any person submitting an electronic DMR using the state’s eDMR system shall make the following certification [40 CFR 122.22]. NO OTHER STATEMENTS OF CERTIFICATION WILL BE ACCEPTED: "I certify, under penalty of law, that this document and all attachments were prepared under my direction or supervision in accordance with a system designed to assure that qualified personnel properly gather and evaluate the information submitted. Based on my inquiry of the person or persons who manage the system, or those persons directly responsible for gathering the information, the information submitted is, to the best of my knowledge and belief, true, accurate, and complete. I am aware that there are significant penalties for submitting false information, including the possibility of fines and imprisonment for knowing violations." 5. Records Retention [Supplements Section D. (6.)] The permittee shall retain records of all Discharge Monitoring Reports, including eDMR submissions. These records or copies shall be maintained for a period of at least 3 years from the date of the report. This period may be extended by request of the Director at any time [40 CFR 122.41].