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Home My WebLink AboutNC0038377_Compliance Evaluation Inspection_20221208 North Carolina Department of Environmental Quality Division of Water Resources Raleigh Regional Office 3800 Barrett Drive Raleigh, North Carolina 27609 919.791.4200 December 8, 2022 Tom Copolo, Plant Manager Duke Energy Steam Electric Power Plant 1660 Boston Road Roxboro, NC 27573 Subject: NPDES Compliance Evaluation Inspection Mayo Steam Electric Generating Plant NPDES Permit No. NC0038377 Person County Dear Mr. Copolo: 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. DocuSign Envelope ID: AFC38AAF-5395-4B02-890C-C500DC5C71A2 North Carolina Department of Environmental Quality Division of Water Resources Raleigh Regional Office 3800 Barrett Drive Raleigh, North Carolina 27609 919.791.4200 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.goss@ncdenr.gov. Sincerely, Vanessa E. Manuel, Assistant Regional Supervisor Water Quality Regional Operations Section Raleigh Regional Office Division of Water Resources, NCDEQ cc: Laserfiche DocuSign Envelope ID: AFC38AAF-5395-4B02-890C-C500DC5C71A2 EPA United States Environmental Protection Agency Washington, D.C. 20460 Water Compliance Inspection Report Form Approved. OMB No. 2040-0057 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 N 52 NC0038377 22/12/07 C S31112171819 20 21 66 Inspection Work Days Facility Self-Monitoring Evaluation Rating B1 QA ----------------------Reserved------------------- N67707172 73 74 75 80 Section B: Facility Data Name and Location of Facility Inspected (For Industrial Users discharging to POTW, also include POTW name and NPDES permit Number) Mayo Steam Electric Power Plant 10660 Boston Rd Roxboro NC 27573 Entry Time/Date Permit Effective Date Exit Time/Date Permit Expiration Date 10:00AM 22/12/07 22/01/01 Name(s) of Onsite Representative(s)/Titles(s)/Phone and Fax Number(s) /// Joseph Heath Slade/ORC/336-597-7398/ Other Facility Data 12:45PM 22/12/07 23/07/31 Name, Address of Responsible Official/Title/Phone and Fax Number Tom Copolo,10660 Boston Rd Roxboro NC 27574/Plant Manager/336-597-7307/Contacted No Section C: Areas Evaluated During Inspection (Check only those areas evaluated) Permit Flow Measurement Operations & Maintenance Records/Reports Self-Monitoring Program Facility Site Review Compliance Schedules Effluent/Receiving Waters 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 Stephanie Goss DWR/RRO WQ/919-791-4200/ Timothy Clark DWR/RRO WQ/919-791-4234/ Signature of Management Q A Reviewer Agency/Office/Phone and Fax Numbers Date EPA Form 3560-3 (Rev 9-94) Previous editions are obsolete. Page#1 12/8/2022 DocuSign Envelope ID: AFC38AAF-5395-4B02-890C-C500DC5C71A2 12/8/2022 NPDES yr/mo/day 22/12/07 Inspection Type C3111218 1 Section D: Summary of Finding/Comments (Attach additional sheets of narrative and checklists as necessary) NC0038377 17 Page#2 DocuSign Envelope ID: AFC38AAF-5395-4B02-890C-C500DC5C71A2 Permit:NC0038377 Inspection Date:12/07/2022 Owner - Facility: Inspection Type: Mayo Steam Electric Power Plant Compliance Evaluation Compliance Schedules Yes No NA NE Is there a compliance schedule for this facility? Is the facility compliant with the permit and conditions for the review period? Comment: Operations & Maintenance Yes No NA NE Is the plant generally clean with acceptable housekeeping? Does the facility analyze process control parameters, for ex: MLSS, MCRT, Settleable 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? # Are there any special conditions for the permit? Is access to the plant site restricted to the general public? Is the inspector granted access to all areas for inspection? Comment: Record Keeping Yes No NA NE Are records kept and maintained as required by the permit? Is all required information readily available, complete and current? Are all records maintained for 3 years (lab. reg. required 5 years)? Are analytical results consistent with data reported on DMRs? Is the chain-of-custody complete? 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? Has the facility submitted its annual compliance report to users and DWQ? Page#3 DocuSign Envelope ID: AFC38AAF-5395-4B02-890C-C500DC5C71A2 Permit:NC0038377 Inspection Date:12/07/2022 Owner - Facility: Inspection Type: Mayo Steam Electric Power Plant 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? Is the ORC certified at grade equal to or higher than the facility classification? 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? Facility has copy of previous year's Annual Report on file for review? Comment: Effluent Pipe Yes No NA NE Is right of way to the outfall properly maintained? 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? Is sample collected below all treatment units? Is proper volume collected? Is the tubing clean? # Is proper temperature set for sample storage (kept at less than or equal to 6.0 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? Are all other parameters(excluding field parameters) performed by a certified lab? # Is the facility using a contract lab? # 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? Incubator (BOD) set to 20.0 degrees Celsius +/- 1.0 degrees? Page#4 DocuSign Envelope ID: AFC38AAF-5395-4B02-890C-C500DC5C71A2 Permit:NC0038377 Inspection Date:12/07/2022 Owner - Facility: Inspection Type: Mayo Steam Electric Power Plant Compliance Evaluation Laboratory Yes No NA NE Comment: Flow Measurement - Effluent Yes No NA NE # Is flow meter used for reporting? Is flow meter calibrated annually? Is the flow meter operational? (If units are separated) Does the chart recorder match the flow meter? The flow meter was out of service and a staff gauge was being used at the time of the inpsection for flow. Comment: Page#5 DocuSign Envelope ID: AFC38AAF-5395-4B02-890C-C500DC5C71A2