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HomeMy WebLinkAboutNC0085812_Draft Permit_20220111ROY COOPER Governor ELIZABETH S. BISER Secretary S. DANIEL SMITH NORTH CAROLINA Director Environmental Quality January 11, 2022 Mark Watson, County Manager Union County Public Works 500 N Main St, Ste 918 Monroe, NC 28112 Subject: Draft NPDES Permit NC0085812 Grassy Branch WRF Grade II Biological WPCS Union County Dear Mr. Neff: The Division has reviewed your request to modify the subject permit. Please review this draft carefully to ensure a thorough understanding of the information, conditions, and requirements it contains. The draft permit includes the following significant changes from the existing permit: • The permit was modified for flow expansion from 0.050 MGD to 0.120 MGD. A second effluent table is included for the flow modification. See Condition A. (2.). • The limit for dissolved oxygen is changed to Daily Average > 6.0 mg/L. See Conditions A. (1.) and (2.). This change is in accordance with flow design criteria for new and expanding discharges to zero flow streams (7Q10 = 0 and 30Q2 > 0) [15A NCAC 02B .0206]. The original wasteload allocation in 1996 indicated this limitation as well. • The electronic reporting permit special condition A. (4.) was updated. • The permit map was updated. 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. With this notification, the Division will solicit public comment on this draft permit by publishing a notice in newspapers having circulation in the general Union County area, per EPA requirements. Please provide your comments, if any, to me at the address below no later than 30 days after receiving 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. NORTH CAROLINA Department of Environmental Quality North Carolina Department of Environmental Quality I Division of Water Resources 512 North Salisbury Street 11617 Mail Service Center I Raleigh, North Carolina 27699-1617 919.707.9000 If you have questions concerning the draft, please contact me at 919-707-3618, or via e-mail at derek.denard@ncdenr.gov. Sincerely, Derek C. Denard, Environmental Specialist Division of Water Resources, NCDEQ ec: NPDES Files [Laserfiche] Union County / William M. Watson[Mark.Watson@unioncountync.gov]; Andy Neff, P.E., [andy.neff@unioncountync.gov]; Bart Farmer[bart.farmergunioncountync.gov] DWR/MRO Corey Basinger [corey.basinger@ncdenr.gov]; Roberto Scheller [roberto.scheller@ncdenr.gov] NPDES Permit NC0085812 STATE OF NORTH CAROLINA DEPARTMENT OF ENVIRONMENTAL QUALITY DIVISION OF WATER RESOURCES PERMIT TO DISCHARGE WASTEWATER UNDER THE NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM (NPDES) In compliance with the provisions of North Carolina G and regulations promulgated and adopted by Commission, and the Federal Wa r tatute 143-215.1, other lawful standards Carolina Environmental Management ution Control Act, as amended, Union County • lic orks are hereby authorized to discharwastewate a facility located at the GrasiBranch WW 1629 Old Fis oad (off NCS , onroe, NC Union County to receiving waters designated as Crooked Creek with e Yadkin -Pee Dee River Basin in accordance with effluent limitations, monitoring requirements, and r conditions set forth in Parts I, II, III, and IV hereof. The permit sliall bjcome effecti This permit and the authorization Signed this day ischarge shall expire at midnight on October 31, 2023. S. Daniel Smith, Director Division of Water Resources By Authority of the Environmental Management Commission Page 1 of 9 NPDES Permit NC0085812 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. Union County Public Works is hereby authorized to: 1. Continue to operate an existing 0.05 MGD wastewaent that includes the following wastewater treatment components: • an influent pump station • a manual bar screen • two (2) flow equalization basins • two (2) aeration basins • two (2) secondary clarifi • aerated sludge digester • two (2) tertiary filters • ultraviolet disinfection • backup chlorination/dechlorinati • continuous flow measurement • standbpower located at the Grassy WWTP (1629 Old Fish l(ad, 2. after receipt ohn Authoriz ion to Construct and submittal 0.120 GD, operate tewater treatment plant consisting an influent station two (2) manua screens ee (3) flow equalization basins (3) aeration basins • th secondary clarifiers • three -rated sludge iligesters • three (3) fi ters • a disc filter • ultraviolet disco econ • backup chlorination/dechlorination • continuous flow measurement • standby power Monroe) in Union County; and of an Engineers Certification for expansion to of the following components: 3. discharge from said treatment works, via Outfall 001, at a location specified on the attached map, into Crooked Creek [Stream Index 13-17-20], currently Class C waters within Subbasin 03-07-12 [HUC 030401050702] of the Yadkin -Pee Dee River Basin. Page 2 of 9 NPDES Permit NC0085812 PART I A. (1.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS [15A NCAC 02B .0400 et seq., 15A NCAC 02B .0500 et seq.] Grade II Biological Water Pollution Control System [15A NCAC 08G.0302] During the period beginning on the effective date of this permit and lasting until expansion above 0.050 MGD or expiration, the Permittee is authorized to discharge treated wastewater from Outfall 001. Such discharges shall be limited and monitored) by the Permittee as specified below: EFFLUENT CHARACTERISTICS [PARAMETER CODES] LIMITS MONITORING REQUIREMENTS1 Monthly Average Weekly Average Daily Maximum Measurement Frequency Sample Type Sample Location2 Flow (MGD)50050 0.050 MGD Continuous RecordingInfluent or Effluent BOD, 5-day, 20°C (mg/L) 3 (April 1 — October 31) C0310 5.0 mg/L 7.5 mg/L Weekly Composite Effluent, Influent BOD, 5-day, 20°C (mg/L) 3 (November 1—March 31) C0310 10.0 mg/L 15.0 Weekly omposite Effluent, Influent Total Suspended Solids 3 (TSS) (mg/L) C0530 45.0 mg/L Weekly Composite Effluent, Influent NH3 as N (mg/L) (April 1 — October 31) C0610 2.0 L Weekly Composite Effluent NH3 as N (mg/L) (November 1 —March 31) C0610 4.0 mg 12.0 m Weekly Composite Effluent Dissolved Oxygen (DO) 0030 Daily Average > 6.0 mg/L 4 Weekly Grab Effluent Fecal Coliform (#/100 ml) (geometric mean) 31616 0/100 ml 4 0 ml Weekly Grab Effluent Temperatur itorin eport Weekly Grab Effluent Total Chlorine (TRC) 50060 17 µg/L5 2/Week Grab Effluent pH (su) 00400 and < 9.0 standard units Weekly Grab Effluent 6 Mercury, Total (n COMER 6 Once Per Permit Cycle Once per permit cycle Grab Effluent Dissolved Oxygen (D L) 00300 Monitor & Report Variable2 Grab U, D Temperature (°C) 00010 Monitor & Report Variable2 Grab U, D Footnotes: 1. The permittee shall submit discharge monitoring reports electronically using the Division's eDMR system [see A. (4)]. 2. Sample locations: U- Upstream 50 feet above discharge point, D- Downstream at NC 218 bridge. Upstream/downstream samples shall be collected 3/Week during June, July, August, September, and Weekly during the remaining months of the year. Instream monitoring requirements shall be provisionally waived so long as the permittee remains a member of the Yadkin Pee Dee River Basin Association and the Association continues to function as approved by the Division and Environmental Management Commission. Page 3 of 9 NPDES Permit NC0085812 3. The monthly average effluent BOD5 and TSS concentrations shall not exceed 15% of the respective influent value (85% removal). 4. Total Residual Chlorine monitoring is required only if chlorine is added to the effluent. 5. The Division shall consider all effluent TRC values reported below 50 gg/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 gg/L. 6. Compliance with this limit shall be determined in accordance with A. (3). Conditions: • There shall be no discharge of floating solids or visible foam in others trace amounts. Page 4 of 9 NPDES Permit NC0085812 A. (2.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS [15A NCAC 02B .0400 et seq., 15A NCAC 02B .0500 et seq.] Grade II Biological Water Pollution Control System [15A NCAC 08G.0302] During the period beginning upon receipt of an Engineer's Certification for completion of the 0.120 MGD expansion and lasting until expiration, the Permittee is authorized to discharge treated wastewater from Outfall 001. Such discharges shall be limited and monitored) by the Permittee as specified below: EFFLUENT CHARACTERISTICS [PARAMETER CODES] LIMITS MONITORING REQUIREMENTS1 Monthly Average Weekly Average Daily Maximum Measurement Frequency Sample Type Sample Location2 Flow (MGD)50050 0.120 MGD Continuous RecordingInfluent or Effluent BOD, 5-day, 20°C (mg/L) 3 (April 1 — October 31) C0310 5.0 mg/L 7.5 mg/L Weekly Composite Effluent, Influent BOD, 5-day, 20°C (mg/L) 3 (November 1—March 31) C0310 10.0 mg/L .0 mg/L Composite Effluent, Influent Total Suspended Solids 3 (TSS) (mg/L) C0530 30.0 mg/L 45.0 m Week Composite Effluent, Influent NH3 as N (mg/L) (April 1 — October 31) C0610 L 6.0 mg/ Weekly omposite Effluent NH3 as N (mg/L) (November 1 — March 31) C0610 4. 0 mg/L Weekly Composite Effluent Dissolved Oxygen (DO) (mg/L) 00300 ► y Aver 4 mg/L Weekly Grab Effluent Fecal Coliform (#/100 ml) (geometric mean) 200/100 ml 400/100 m Weekly Grab Effluent Temperature (°C) 00010 ' Monitoring & Report Weekly Grab Effluent Total Residual Chlorine 4'5 141 (TRC) (µg/ 50060 17 µg/L5 2/Week Grab Effluent pH (su) 00400 > 6.0 standard units Weekly Grab Effluent 6 Mercury, (ng/L) OMER 6 Once Per Permit Cycle Once per permit cycle Grab Effluent Dissolved Oxy O) (mg/L) onitor & Report Variable2 Grab U, D Temperature (°C) 000 Monitor & Report Variable2 Grab U, D Footnotes: 1. The permittee shall submiu. arge monitoring reports electronically using the Division's eDMR system [see A. (4)]. 2. Sample locations: U- Upstream 50 feet above discharge point, D- Downstream at NC 218 bridge. Upstream/downstream samples shall be collected 3/Week during June, July, August, September, and Weekly during the remaining months of the year. Instream monitoring requirements shall be provisionally waived so long as the permittee remains a member of the Yadkin Pee Dee River Basin Association and the Association continues to function as approved by the Division and Environmental Management Commission. 3. The monthly average effluent BOD5 and TSS concentrations shall not exceed 15% of the respective influent value (85% removal). Page 5 of 9 NPDES Permit NC0085812 4. Total Residual Chlorine monitoring is required only if chlorine is added to the effluent. 5. The Division shall consider all effluent TRC 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/L. 6. Compliance with this limit shall be determined in accordance with A. (3). Conditions: • There shall be no discharge of floating solids or visible foam in other than trace amounts. A. (3.) EFFLUENT MERCURY ANALYSIS [G.S. 143-2 The Permittee shall provide one effluent mercury sis, using EPA Method 1631E, in conjunction with the next permit renewal application. The analysis should be taken within 12 months prior to the application date. Any additional mercu effluent mercury measurement conducted from the effective date of this permit and up to the applicate shall be submitted with the renewal application. If the result of the mercury analysis is iii i provided with the application, the application may be returned as incomplete and the Permittee considered non -compliant. Page 6 of 9 NPDES Permit NC0085812 A. (4.) ELECTRONIC REPORTING - 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. Re , ortin Re i uirements Su s ersedes Section D. 2. and Section E. 5. The permittee shall report discharge monitoring data electronic 11y using the DWR's Electronic Discharge Monitoring Report (eDMR) internet application. Monitoring results obtained duringthe previous month(s) 1 be summarized for each month and submitted electronically using eDMR. The eDMR system al s 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 ultble to use the eDMR system due to a demonstrated hardship or due to the facility being physically 1 cated in an area where less than 10 percent oftfie households have broadband access, then a temporary waiver from the NPDLS 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 D Division of Water Resources / Water Quality Permitting Section ATTEN : Central Files 1617 Mail e Center w Raleigh, Nort . slim 276917 See "How to Reque' om 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: Page 7 of 9 NPDES Permit NC0085812 • 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 identthe 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 1lPDES-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 electro • orting tool for each type of electronic submission and for each state. Instructions on how to a . i d use the appropriate electronic reporting toil will be available as well. Information on EP NPDES Electronic Reporting Rule is found at: https://www.federilregister.gov/documents/2015/10/22/2015- 24954/nati onal-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 su•mit an electronic reporting waiver request to the Division. Requests for temporary electronic re • s g waivers must be submitted in writing to the Division for written approval at least six d. s prior to the date the facility would be required under this permit to begin submitting m toring data and reports. The duration of a temporary waiver shall not exceed 5 years and shall thereupon expire. At such time, monitoring data and repo all be submits electronically to the Division unless the permittee re -applies for and is granted a n: porary electronic reporting waiver by the Division. Approved electronic reporting waivers are n r . sferrable. Only permittees with an approved reporting waiver request may submit monitorin, . and repo+ on paper to the Division for the period that the approved reporting waiver re • s effective. Information on eDMR an the following web page: e application for a temporary electronic reporting waiver are found on http://deq.nc.gov/about/divisions/water-resources/edmr Page 8 of 9 NPDES Permit NC0085812 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 a DMR user account, please visit the following web page: http://deq.nc.gov/about/divisions/water-resources/edmr Certification. Any person submitting an electroni the following certification [40 CFR 122.22]. WILL BE ACCEPTED: using the state's eDMR system shall make ER STATEMENTS OF CERTIFICATION "I certify, under penalty of law, that this document and all at ents were prepared under my direction or supervision in accorda ce with a systesignec'assure that qualified personnel properly gather and evaluate the iormation submitted. Based on my inquiry of the person or persons who manage the system, or those per s directly responsible for gathering the information, the information submitted is, to the besmy edge and belief true, accurate, and complete. I am aware that there are significant pen s for mitting false inf rmation, including the possibility of fines an imprisonment for knowing violations " 5. Records Retention [Supplements Section D. (6.)1 The permittshall retain records of all Discharge M nitoring Reports, including eDMR submissions. These records or copies shall be main ed for a period of at least 3 years from the date of the report. This period may be extend r uest of the Director at any time [40 CFR 122.41]. Page 9 of 9 Outfall 001 tut ot, fin% crh° Union County Public Works Grassy Branch WWTP NPDES Permit NC0085812 1629 Old Fish Road, Monroe, NC Receiving Stream: Crooked Creek Stream Segment: 13-17-20 River Basin: Yadkin -Pee Dee County: Union Stream Class: C Sub -Basin #: 03-07-12 HUC: 030401050702 SCALE 1:24,000 1:14,000,000VeSVIIII sir-NWPAit���� ram, Outfall 001: 35° 07' 50" N, -80° 29' 40" W USGS Quad: Stanfield, NC