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Home My WebLink AboutNCG500119_Compliance Evaluation Inspection_20210427ROY COOPER Governor DIONNE DELLI-GATTI Secretary S. DANIEL SMITH Director Michael Brissie, Hydro East Area Manager Duke Energy Carolinas, LLC 257 Duke Lane Stanley, NC 28164 Dear Mr. Brissie: NORTH CAROLINA Environmental Quality April 27, 2021 SUBJECT: Compliance Evaluation Inspection Oxford Hydroelectric Station NPDES Permit No. NCG5000119 Catawba County Enclosed is a copy of the Compliance Evaluation Inspection Report for the inspection conducted at the subject facility on April 13, 2021, by Mr. Wes Bell of this Office. Please inform the facility staff that oversee the environmental affairs of our findings by forwarding a copy of the enclosed report. The report should be self-explanatory; however, should you have any questions concerning this report, please do not hesitate to contact Mr. Bell at (704) 235-2192 or at wes.bell@ncdenr.gov. Enclosure: Inspection Report DNORTH CPPOLINA _E Sincerely, —DocuSigned by: `—A14CC681 AF27425... W. Corey Basinger, Regional Supervisor Water Quality Regional Operations Section Mooresville Regional Office Division of Water Resources, NCDEQ North Carolina Department of Environmental Quality I Division of Water Resources Mooresville Regional Office 1610 East Center Avenue. Suite 301 I Mooresville. North Carolina 28115 704.663.1699 United States Environmental Protection Agency EPA 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 1 IN I 2 IL I 21 1 1 1 1 1 NPDES yr/mo/day Inspection 3 I NCG500119 111 121 21/04/13 117 Type 1810I I I 1 1 1 Inspector Fac Type 191 S I 2011 1 1 1 1 11 1 1 1 I I I 1 1 1 1 1 1 I I I I I 1 11 1 1 1 I 1 P6 Inspection Work Days Facility Self -Monitoring Evaluation Rating B1 QA Reserved 67I1.0 I 70I4 I 71IN I 72 I N I 73I 1 74 751 I I 1 I I I I I I 180 l Section B: Facility Data Name and Location of Facility Inspected (For Industrial Users discharging to POTW, also include POTW name and NPDES oermit Number) Oxford Hydroelectric Station 6874 NC Hwy 16 N Conover NC 28613 Entry Time/Date 12:32PM 21/04/13 Permit Effective Date 20/12/11 Exit Time/Date 01:08PM 21/04/13 Permit Expiration Date 25/11/30 Name(s) of Onsite Representative(s)/Titles(s)/Phone and Fax Number(s) /// Glenn Long//980-722-0678 / Other Facility Data Name, Address of Responsible Official/Title/Phone and Fax Number Contacted Randy Herring,257 Duke Ln Stanley NC 28164/VP of CRR// No Section C: Areas Evaluated During Inspection (Check only those areas evaluated) Permit Flow Measurement Operations & Maintenar Records/Reports Self -Monitoring Progran Facility Site Review 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) Wes Bell of Inspector(s) Agency/Office/Phone and Fax Numbers Date DocuSigned by: DWR/MRO WQ/704-663-1699 Ext.2192/ 4/27/2021 Lle&,, 3dit A61696D9OCC3437... Signature of Management Q A Reviewer Agency/Office/Phone and Fax Numbers Date W. Corey Basinger DWR/Division of Water Quality/704-235-2194/ EPA Form 3560-3 (Rev 9-94) Previous editions are obsolete. DocuSigned by: 4/27/2021 "-A14CC681AF27425... Page# 1 sI NPDES yr/mo/day N CG500119 111 121 21/04/13 117 Inspection Type 18 [j 1 Section D: Summary of Finding/Comments (Attach additional sheets of narrative and checklists as necessary) On -site Representatives: The following Duke Energy personnel were in attendance during the inspection: Mr. Glenn Long, Mr. Steve Cahoon and Mr. Courtney Flowe. Page# 2 Permit: NCG500119 Inspection Date: 04/13/2021 Owner - Facility: Oxford Hydroelectric Station Inspection Type: Compliance Evaluation Permit (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? Yes No NA NE ❑ ❑ • ❑ • ❑ ❑ ❑ Comment: The last compliance evaluation inspection at this facility was performed by DWR staff on 5/24/2017. Record Keeping 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? Yes No NA NE • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ ❑ ❑•❑ • ❑ ❑ ❑ • • • • • • ❑ ❑ • ❑ ❑ ❑•❑ (If the facility is = or > 5 MGD permitted flow) Do they operate 24/7 with a certified operatc ❑ ❑ • ❑ 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: The records reviewed during the inspection were organized and well maintained. No permit limit violations occurred during the sampling events in 2018, 2019 and 2020. Laboratory Are field parameters performed by certified personnel or laboratory? Yes No NA NE Page# 3 Permit: NCG500119 Inspection Date: 04/13/2021 Owner - Facility: Oxford Hydroelectric Station Inspection Type: Compliance Evaluation Laboratory Yes No NA NE 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? • ❑ ❑ ❑ ❑ ❑ ❑ • ❑ ❑ • ❑ ❑ ❑ • ❑ Comment: On -site effluent field analyses (pH and temperature) are performed by Duke Energy staff. Oil and grease analyses are performed by Duke Energy's Analytical Laboratory (Certification #248). There are instances when oil & grease samples are stored in a cooler (on ice) for multiple days prior to being transported to the lab. Staff should monitor the temperature each day samples are being stored in the coolers to verify samples are being properly preserved at less than or equal to six degrees Celsius (Reference: 40 CFR 136.3 Table II). Effluent Sampling 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: The subject permit requires grab samples. Yes No NA NE ❑ ❑ • ❑ ❑ ❑ • ❑ ❑ ❑ • ❑ • ❑ ❑ ❑ Upstream / Downstream Sampling Yes No NA NE Is the facility sampling performed as required by the permit (frequency, sampling type, anc • ❑ ❑ ❑ sampling location)? Comment: Operations & Maintenance 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? Yes No NA NE • ❑ ❑ ❑ ❑ ❑ • ❑ Comment: The facility was being well maintained. Oil detection systems have been installed in the wheel pit areas and main storage tank (for all drains). The pump inside the tank will automatically shut off if oil is detected. The oil detection systems are tested monthly. Page# 4 Permit: NCG500119 Inspection Date: 04/13/2021 Owner - Facility: Oxford Hydroelectric Station Inspection Type: Compliance Evaluation Flow Measurement - Effluent # 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? Comment: Flows are based on megawatt production. Effluent Pipe 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: No petroleum sheens were observed at the tailrace area. Yes No NA NE ❑ ❑ • ❑ ❑ ❑ • ❑ Yes No NA NE • ❑ ❑ ❑ ❑ ❑ • ❑ Page# 5