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Home My WebLink AboutNC0038377_Inspection_20230912DocuSign Envelope ID: AFC38AAF-5395-4B02-890C-0500DC5C7lA2 ROY COOPER Governor ELIZABETH S. BISER Secretary RICHARD E. ROGERS, JR. Director December 8, 2022 Tom Copolo, Plant Manager Duke Energy Steam Electric Power Plant 1660 Boston Road Roxboro, NC 27573 Dear Mr. Copolo: NORTH CAROLINA Environmental Quality Subject: NPDES Compliance Evaluation Inspection Mayo Steam Electric Generating Plant NPDES Permit No. NCO038377 Person County On December 7, 2022, Stephanie Goss, and Timothy Clark of the Raleigh Regional Office (RRO), conducted an inspection at the subject facility. The cooperation of Leanne Wilson, Lori Tollie, Heath Slade (ORC), and Sammy Carswell (Backup ORC) was appreciated. Findings during the inspection were as follows: 1. The current NPDES permit was issued effective August 1, 2019 and expires on July 31, 2023. 2. The Mayo Steam Electric Generating Plant is classified PC-1 and WW-2 and is permitted to discharge wastewater from the cooling towers and circulating water system and discharged directly into Mayo Reservoir via Outfall 001 and the ash pond via Outfall 002 (with wastewater from a variety of sources drained into Internal Outfalls 002A, 002B, 008, 009 and 011). 3. The plant discharges to receiving waters designated as Hyco Lake, classified as WS-V waters in the Roanoke River Basin. 4. A review of discharge monitoring report (DMR) data for the period April 2021 through present showed all required monitoring was performed and that the facility complied with all permit limits. 5. A cursory review of laboratory and DMR data for August 2021 and January 2022 showed consistent reporting of results. 6. A cursory review of calibration logs showed acceptable calibration for on -site parameter's pH and temperature. 7. All domestic wastewater is treated by a package plant with chlorine tablet disinfection. The effluent from the package plant discharges to Mayo Reservoir via Outfall 002. 8. The inspector observed all the outfalls during the inspection and no compliance issues were observed at the time of the inspection. North Carolina Department of Environmental Quality I Division of Water Resources Raleigh Regional Office I 3800 Barrett Drive I Raleigh, North Carolina 27609 NORTH CAROLINA 919.791.4200 UeperhnerM of EnvlronmeMnl Ouallry DocuSign Envelope ID: AFC38AAF-5395-4B02-890C-0500DC5C71A2 Page 2 of 2 9. The ORC maintains a daily logbook which contains data such as temperature of Outfall 002, the package plant data, flow of Outfall 008 and collection of pH. 10. The right of way to the outfalls were well maintained. No visible impacts were observed immediately downstream of Outfall 002. The facility is compliant with the NPDES permit conditions as a result of this inspection. If you have questions concerning this report please contact Stephanie Goss at 919-791-4256 or Stephanie. g_oss ntedenngov. Sincerely, DocuSigned by: VauAJ,SSA, f. 82916HAB321441` Vanessa E. Manuel, Assistant Regional Supervisor Water Quality Regional Operations Section Raleigh Regional Office Division of Water Resources, NCDEQ cc: Laserfiche D E Q�� North Carolina Department of Environmental Quality I Division of Water Resources Raleigh Regional Office 1 3800 Barrett Drive I Raleigh, North Carolina 27609 NORrH CAROLINA 919.791.4200 DeDanmam Dr Ea.imamaaUi Daai� /"� DocuSign Envelope ID: AFC38AAF-5395-4BO2-89OC-050ODC5C71A2 United States Environmental Protection Agency Form Approved. EPA Washington, D.C. 20460 OMB No. 2040-0057 Water Compliance Inspection Report Approval expires 8-31-98 Section A: National Data System Coding (i.e., PCS) Transaction Code NPDES yr/mo/day Inspection Type Inspector Fac Type 1 IN 1 2 15 I 3 I NCO038377 111 121 22/12/07 I17 18 I r I 19 I G I 201 I 211IIIII IIIIIIIIIII IIIIIII I IIIIII IIIIII�1IIII 166 Inspection Work Days Facility Self -Monitoring Evaluation Rating B1 QA ---------------------- Reserved ------------------- 67 70 LJ I I 71 I tyI 72 I Lni I 73 �I74 79 I I I I I I 180 J Section B: Facility Data Name and Location of Facility Inspected (For Industrial Users discharging to POTW, also include Entry Time/Date Permit Effective Date POTW name and NPDES Dermit Number) 10:OOAM 22/12/07 22/01/01 Mayo Steam Electric Power Plant 10660 Boston Rd Exit Time/Date Permit Expiration Date Roxboro NC 27573 12:45PM 22/12/07 23/07/31 Name(s) of Onsite Representative(s)/Titles(s)/Phone and Fax Number(s) Other Facility Data Joseph Heath Slade/ORC/336-597-7398/ Name, Address of Responsible Official/Title/Phone and Fax Number Contacted Tom Copolo,10660 Boston Rd Roxboro NC 27574/Plant Manager/336-597-7307/ No Section C: Areas Evaluated During Inspection (Check only those areas evaluated) Permit 0 Flow Measurement Operations & Maintenar Records/Reports Self -Monitoring Progran 0 Facility Site Review Compliance Schedules Effluent/Receiving Wate Laboratory Section D: Summary of Finding/Comments (Attach additional sheets of narrative and checklists as necessary) (See attachment summary) Name(s) and Signature(s) of Inspector(s) Agency/Office/Phone and Fax Numbers Date DocuSigned by: 12/8/2022 DWR/RRO WQ/919-791-4200/ Stephanie Goss E�755ABFOCNOB428... Timothy Clark 1't pU.A (' [BOSS DWR/RRO WQ/919-791-4234/ Signature of Management Q A Reviewer Agency/Office/Phone and Fax Numbers Date DocuSigned by: 12/8/2022 VcUn t,SSa f. �— B2916HAB32144F... EPA Form 3560-3 (Rev 9-94) Previous editions are obsolete. Page# DocuSign Envelope ID: AFC38AAF-5395-4B02-890C-0500DC5C71A2 NPDES yr/mo/day Inspection Type NCO038377 I11 12I 22/12/07 117 18 ICI Section D: Summary of Finding/Comments (Attach additional sheets of narrative and checklists as necessary) Page# DocuSign Envelope ID: AFC38AAF-5395-4B02-890C-0500DC5C71A2 Permit: NCO038377 Owner -Facility: Mayo Steam Electric Power Plant Inspection Date: 12/07/2022 Inspection Type: Compliance Evaluation Compliance Schedules Yes No NA NE Is there a compliance schedule for this facility? ❑ ❑ 0 ❑ Is the facility compliant with the permit and conditions for the review period? 0 ❑ ❑ ❑ Comment: Operations & Maintenance Yes No NA NE Is the plant generally clean with acceptable housekeeping? E ❑ ❑ ❑ Does the facility analyze process control parameters, for ex: MLSS, MCRT, Settleable ❑ ❑ 0 ❑ Solids, pH, DO, Sludge Judge, and other that are applicable? Comment: Permit Yes No NA NE (If the present permit expires in 6 months or less). Has the permittee submitted a new ❑ ❑ ■ ❑ application? Is the facility as described in the permit? N ❑ ❑ ❑ # Are there any special conditions for the permit? ❑ ❑ 0 ❑ Is access to the plant site restricted to the general public? 0 ❑ ❑ ❑ Is the inspector granted access to all areas for inspection? 0 ❑ ❑ ❑ Comment: Record Keeping Yes No NA NE Are records kept and maintained as required by the permit? 0 ❑ ❑ ❑ Is all required information readily available, complete and current? ■ ❑ ❑ ❑ Are all records maintained for 3 years (lab. reg. required 5 years)? E ❑ ❑ ❑ Are analytical results consistent with data reported on DMRs? 0 ❑ ❑ ❑ Is the chain -of -custody complete? 0 ❑ ❑ ❑ Dates, times and location of sampling ❑ Name of individual performing the sampling ❑ Results of analysis and calibration ❑ Dates of analysis ❑ Name of person performing analyses ❑ Transported COCs ❑ Are DMRs complete: do they include all permit parameters? 0 ❑ ❑ ❑ Has the facility submitted its annual compliance report to users and DWQ? ❑ ❑ 0 ❑ Page# 3 DocuSign Envelope ID: AFC38AAF-5395-4B02-890C-0500DC5C71A2 Permit: NCO038377 Owner -Facility: Mayo Steam Electric Power Plant Inspection Date: 12/07/2022 Inspection Type: Compliance Evaluation Record Keeping Yes No NA NE (If the facility is = or > 5 MGD permitted flow) Do they operate 24/7 with a certified ❑ ❑ ❑ operator on each shift? Is the ORC visitation log available and current? 0 ❑ ❑ ❑ Is the ORC certified at grade equal to or higher than the facility classification? 0 ❑ ❑ ❑ Is the backup operator certified at one grade less or greater than the facility ❑ ❑ ❑ classification? Is a copy of the current NPDES permit available on site? 0 ❑ ❑ ❑ Facility has copy of previous year's Annual Report on file for review? ❑ ❑ MEI Comment: Effluent Pipe Yes No NA NE Is right of way to the outfall properly maintained? M ❑ ❑ ❑ Are the receiving water free of foam other than trace amounts and other debris? ■ ❑ ❑ ❑ If effluent (diffuser pipes are required) are they operating properly? ❑ ❑ ■ ❑ Comment: Effluent Sampling Yes No NA NE Is composite sampling flow proportional? 0 ❑ ❑ ❑ Is sample collected below all treatment units? ❑ ❑ ❑ Is proper volume collected? ❑ ❑ ❑ Is the tubing clean? ❑ ❑ 0 ❑ # Is proper temperature set for sample storage (kept at less than or equal to 6.0 0 ❑ ❑ ❑ degrees Celsius)? Is the facility sampling performed as required by the permit (frequency, sampling type ❑ ❑ ❑ representative)? Comment: Laboratory Yes No NA NE Are field parameters performed by certified personnel or laboratory? 0 ❑ ❑ ❑ Are all other parameters(excluding field parameters) performed by a certified lab? 0 ❑ ❑ ❑ # Is the facility using a contract lab? 0 ❑ ❑ ❑ # Is proper temperature set for sample storage (kept at less than or equal to 6.0 ❑ ❑ ❑ degrees Celsius)? Incubator (Fecal Coliform) set to 44.5 degrees Celsius+/- 0.2 degrees? ❑ ❑ 0 ❑ Incubator (BOD) set to 20.0 degrees Celsius +/- 1.0 degrees? ❑ ❑ 0 ❑ Page# 4 DocuSign Envelope ID: AFC38AAF-5395-4B02-890C-0500DC5C71A2 Permit: NC0038377 Inspection Date: 12/07/2022 Laboratory Comment: Flow Measurement - Effluent # Is flow meter used for reporting? Is flow meter calibrated annually? Owner -Facility: Mayo Steam Electric Power Plant Inspection Type: Compliance Evaluation Is the flow meter operational? (If units are separated) Does the chart recorder match the flow meter? Yes No NA NE Yes No NA NE ❑ ■ ❑ ❑ ❑ ❑ ■ ❑ ❑ ■ ❑ ❑ ❑ ❑ ■ ❑ Comment: The flow meter was out of service and a staff gauge was being used at the time of the inpsection for flow. Page# 5