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Home My WebLink AboutNC0038377_Compliance Evaluation Inspection_20190417P01r, COOPER I - : �MICHAEL 5. REGA LINDA CUPEiFE. , 'W P IL April 17, 2019 Nfr. Tom Copolo Plant Manager Duke Energy Mayo Steam Electric Porkcr Plant 10660 Boston Rd Roxboro NC 27573 Subject: Compliance Evaluation Inspection Duke Energy Mayo Steam Electric Power Plant NPDES Permit No. NC0038377 Person County Dear Mr. Copolo: On \March 20, 2019, Clieng Zhang of the Raleigh Regional Office (RRO) conducted a compliance evaluation inspection of the subject facility. The assistance provided by y1r. Heath Slade, the operator in responsible charge (ORC), and NIs. Leanne Wilson. the backup ORC, was greatly appreciated as it facilitated the inspection process. The inspection report is attached. The following observations were made: Mayo Steam Electric Power PIant is permitted to dischargrc wa,,te«'ater from the ash pond via Outfall 002 (with wastewater From a variety of sources drained into %is Internal Outfalls 002A. 00213, 00S, 009, and 01 I ), and storm« ater runoff from Outf tlls 004, 005, 006c, 006d, and 006c into Nlayo Reservoir, v hich 1s classified DVS-k' waters in the Roanoke River Basin. 1. The current permit became effective on AuV,ust 1, 2018, 2. The facility was found compliant with the conditions specified in SOC No. S I S-005. 3. All outfalls were observed during the inspection, the follo%ving outfalls were not discharging at the time of inspection: • Out fal1001, discharge only occurs «lien the cooling towers and circulation water system are drained (less than once per year). • Internal Out fat 1 009, FGD blowvdow n is no longer discharged to the ash pond, instead, is let evaporated at the FGD pond with thermal evaporator. • Outfalls 006c, 006d, and 006e were pennanently scaled %%ith no more stonnwater discharge. • Internal Outfall 00213, yard sump overflow %ill be routed to the new lined retention basin (under construction), • Outfalls 004 and 005, stormwater runoff will be routed (piped) upstream to the nevv Outfall 002 (under construction)_ Discharge was observed at following outfall.w: Outfall 002 (from the ash pond). Internal Outfall 011 (from domestic wastewater treatment plant), and Intenial Outfal1 008 (from cooling tower blowdow n). 4. Construction was on,,oin+a for following items- • New Outfall 002. downstream current 002: • New Storm%vater Outfal1. w ith combined storniwater runoff from current Out falIs 004 and 003, upstream new Outfall 002; • Lined retention basin and new FGD pond_ 5. Two constructed seeps (S-01 and S-02) specified in SOC No. 13-005 were observed during the inspection. 6. The facility had not started dewatering from the ash pond at the time of inspection. 7. The ORC maintains a daily logbook. Lab results, chain -of -custody fo rns, and D%[Rs were complete and current, kept in good order and ready for re%iew. September 2018 DMR data were compared to lab bench sheets; no data transcription errors were noted. Effluent flow meter at Outfall 002 wvere calibrated annualh,. S. The right of way- to the outfalls was well maintained. No risible impacts were noted immediately downstream the Outfall 002. 9. Field lab parameter (Certificate No. 5064) calibration and analysis records were reviewed during the inspection. If you have any questions regarding the attached reports or any of the findings, please contact Cheng Zhang at: (919) 791-4200 (or email: chen+g.zhan+_.'d ncdenr.+,ov). Sinccrcly, Rick Bolich, L.G. Assistant SupM isor Dix ision of Water Resources Raleiah Regional Office ATTACHMENTS Compliance Inspection Reports Cc: Central Files w attachment Ralei-h Regional Office w attachment Leanne Wilson, Nlayo Plant (electronic copy only) n ied Slat7s Env:mr.merol Prcte:::_n-%gercr EPA Form Approved rrasr, cn � : 2C.tE; ONIS No 2040-0057 Water Compliance Inspection Report Approval exp res 3-31-98 Section A. National Data System Coding (i.e. PCSI Transaction Code NPDES yr'me-day Inspect,on Type Inspector Fac Type 1 u 2 1 1 3 I NC0038377 Ill 12 LJ LJ 19;03.2p 17 18 I r, I LI 19 1 e I l�J 201 IJ 21 1 1 1 1 1 1 1 1 1 1 I I 6 Inspect;cri Work Days Facddy Self-hlonitcnng Evaluatior Rating B t CA Reserred 67 70 j ( 71 L_j 72 N 73 74 751 80 I I I 11 Section B Facility Data Name and .ocation of Facility-nspected (For Industr ai Users d scharg;ng to `rOT'N also nclude E'3t.^ir T me,Qate Permit Effective oat- POTV'1 name and NPDES Derm t Number) ��vaA;ti1 17_�r_0 ,a,aaa, Mayo Steam Etectr-c Power Plant 10660 Boston Rd -rx;t T me. Date Permit Expiration Date R>xbcro NC 27573 n 1 UPM 13 01,20 23-D7 31 Namersj cf Onsite Representative; s)rTitles(s.. Phone and Fax Nurin.ter(s, I Other Facil,ty Data Joseph Heath Sla4e.'ORCi336.597.7398f Name. Address of Respons ble OfficiabTitfelPhane and Fax Number Tom Cepolo,10660 Boston Rd Roxboro NC 27 574 Plant Manager'336-59-4307 Contacted No Section C Areas Evaluated During Inspection (Check only those areas evaluated) Permit 0 Flow Measurement 0 Operations & fvlaintenanre M Records/Reports Self -Monitoring Program M Facility Site Review M Compliance Schedules M Effluent/Receiving Waters Laboratory Section D Summary of FindinglComments {Attach additional sheets of narrat ve and checklists as necessary) (See attachment summary) Name(s) and Signature(s) of Inspectcr(s: Cheng Zhang Signature of Management 0 A Reviewer EPA Form 3560-3 (Rev 9-94) Previous eclUns are obsolete AgencyrOffice)Phcne and Far N..r-ters RRO AQ. 919-791.4200 Agency Qff;ce.Pvcne and Fax N.,mbers Date (WI 7/Zot- I Dale Page# 1 NPOES yrimolda/ Irspeceon Type 3 NCOt339377 11 12I 19103/20 ' 17 18 Irl r Section D: Summary of FindinglCommenls (Attach additional sheets of nar•ahve and checklists as necessary} The facility was found compliant with the conditions specified in SOC No Si 8-005. All outfalls were observed during the inspection, the following outfalls were not discharging at the time of inspection: Outfall 001, discharge only occurs when the cooling towers and circulation water system are drained (less than once per year). Internal Outfall 009, FGD blowdown is no longer discharged to the ash pond instead Is let evaporated at the FGD pond with thermal evaporator. Outfalls 006c, 006d, and 006e were permanently sealed with no more stormwater discharge. Internal Outfall 002B, yard sump overflow will be routed to the new lined retention basin (under construction). Outfalls 004 and 005, stormwater runoff will be routed (piped) upstream to the new Outfall 002 (under construction). Discharge was observed at following outfalls Outfall 002, discharge from the ash pond Internal Outfalls 011 and 008 discharge from domestic wastewater treatment plant and cooling tower blowdown, respectively. Construction was ongoing for following items, New Outfall 002. downstream current 002. New Stormwater Outfall, with combined stormwater runoff from current Outfalls 004 and 005, upstream new Outfall 002'. Lined retention basin and new FGO pond Two constructed seeps (S-01 and S-02) specified n 50C No. 18-005 were observed during the inspection. The facility had not started dewatering from the ash pond at the time of inspection. PAVA Permit: NCD03B3, 7 Owner - Facility- Mal Steam Electric Power Plant Inspection Date: 07i2M12019 Inspection Type: 4cmpliance 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? M ❑ ❑ ❑ Comment. Special Order By Consent SOC No. S18-005 was issued to Duke Engergy Prociress. LLC on August 16 2018 which covers both Mao Plant and Roxboro Plant. Duke Engergy is coin liant with the conditions specified in the SOC Permit Yes No NA NE (If the present permit expires in 6 mcnths or less). Has the permittee submitted a new ❑ ❑ ❑ application? Is the facility as described in the permit? M❑ ❑ ❑ # Are there any special conditions for the permit? M ❑ ❑ ❑ Is access to the plant site restricted to the general public'? M ❑ ❑ ❑ Is the inspector granted access to all areas for inspection') M ❑ ❑ ❑ Comment The plant stopped discharginq_fly ash trans art water and bottom ash transport water into the ash pond before the deadlines ecifiied In the permit (November 1. 2018). The facility submitted EPA Form 2C for NPDES Outfalls 004 and 005 to the Division on juanuary 17 2019 as required by the NPDES permit. Operations & Maintenance Yes No NA NE Is the plant generally clean with acceptable housekeeping'? 0❑ ❑ ❑ Does the facility analyze process control parameters for ex NILSS NICRT Settleable ❑ ❑ 0 ❑ Solids, pH DO Sludge Judge. and other that are applicable? Comment: 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 w th data reported on DNIRs'? Is the chain -of -custody complete? Dates times and location of sampling Blame of individual performing the sampling Results of analysis and calibrat'on Dates of analysis Name of person performing analyses Yes No NA NE ■ ❑ ❑ ❑ ❑ ❑ ❑ ■ ❑ ❑ ❑ ■❑❑❑ ❑ ❑ ❑ Page# 3 Permit: NC003B3'7 Owner - Facility: %layo Steam Electric Power Plant Inspection Date. 0312012019 Inspection Type: Cernrliance E-jalualicn Record Keeling Yes No NA NE Transported COCs Are DMRs. complete do they include all permit parameters? ❑ ❑ ❑ Has the facility submitted its annual compliance report to users and DNIQ? ❑ ❑ 0 ❑ (If the facility is = or > 5 MGD permitted flow; Do they operate 24 7 with a certified operator ❑ ❑ 0 ❑ on each shift? Is the ORC visitat on log ava lable and current) ❑ ❑ ❑ Is the ORC certifed at grade equal to or h:gher that' the fac-1 tl classification? ❑ ❑ ❑ Is the backup operator certifed at one grade less cr greater than the facility classification? R ❑ ❑ ❑ Is a copy of the current NPDES permit ava'lable on s-te? 0 ❑ ❑ ❑ Facility has copy of previous year's Annual Rep(:rt an file for rev-ew? ❑ ❑ 0 ❑ Comment: Flow Measurement - Effluent Yes No NA NE # Is flow meter used for reporting? M ❑ ❑ ❑ Is flow meter calibrated annually? ❑ ❑ ❑ Is the flow meter operational? ❑ ❑ ❑ (if un-ts are separated: Does the chart recorder match the flow meter? ❑ ❑ M ❑ Comment Effluent flow meter at Outfall 002 was last calibrated on December 20. 2018. Pump Station - Influent Yes No NA NE 1s the pump wet well free of bypass lines or structures? ❑ ❑ ❑ Is the wet well free of excessive grease? ❑ ❑ ❑ Are all pumps present? ❑ ❑ ❑ Are all pumps operable? M ❑ ❑ ❑ Are float controls operable? 0 ❑ ❑ ❑ Is SCADA telemetry available and operational? ❑ ❑ 0 ❑ Is audible and visual alarm available and operat onaP M ❑ Cl ❑ Comment: At domestic wastewater treatment plant. Two pumps at the lift station. Equalization Basins Yes No NA NE Is the basin aerated? 0 ❑ ❑ ❑ Is the basin free of bypass lines or structures to the natural environment? M ❑ ❑ ❑ Is the basin free of excessive grease? 0 ❑ ❑ ❑ Are all pumps present? 0 ❑ ❑ ❑ Rage# 4 Permit: NCO038377 Owner • Facility: Maya Steam Eiectrxa Power Plant Inspection Dale: 0312012019 Inspection Type: Compliance Evaluation Equalization Basins Yes No NA NE Are all pumps operable? 0 ❑ ❑ ❑ Afe float controls operable? 0 ❑ ❑ ❑ A,e audible and visual alarms operable? E ❑ ❑ ❑ # Is basin sizeivolume adequate? E ❑ ❑ ❑ Comment: At domestic wastewater treatment plant. One Pumpat the EO basin Aeration Basins Yes No NA NE Mode of operation Ext. Air Type of aeration system Surface Is the basin free of dead spots? 0 ❑ ❑ ❑ Are surface aerators and mixers operational? E ❑ ❑ ❑ Are the diffusers operational? N ❑ ❑ ❑ Is the foam ti*e proper color for the treatment process) 0 ❑ ❑ ❑ Does the foam cover less than 25% of the basin s surface? 0 ❑ ❑ ❑ Is the DO level acceptable? N ❑ ❑ ❑ Is the DO level acceptable?(1.0 to 3.0 mgli) 0 ❑ ❑ ❑ Comment- At domestic wastewater treatment plant, Secondary Clarifier Yes No NA NE Is the clarifier free of black and odorous wastewater) 0 ❑ ❑ ❑ Is the site free of excessive buildup of solids in center well of circular --lar,f:e,? ❑ ❑ ❑ Are weirs level? ❑ ❑ ❑ Is the site free of weir blockage? E ❑ ❑ ❑ Is the site free of evidence of short-orcuiting? E ❑ ❑ ❑ Is scum removal adequate? E ❑ ❑ ❑ Is the site free of excessive floating sludge? ❑ ❑ ❑ Is the drive unit operational? ❑ ❑ ❑ Is the return rate acceptable (low turbulence;? 0 ❑ ❑ ❑ Is the overflow clear of excessive solidslpin floc? 0 ❑ ❑ ❑ Is the sludge blanket level acceptable? (Approximately 'l, of the s de-nall depth) 0 ❑ ❑ ❑ Comment At domestic wastewater treatment plant. Disinfection -Tablet Yes No NA NE Page# 5 Permit: NC0039377 Inspection Date: 034M20 t 9 Disinfection -Tablet Are tablet chlorinators cpe•ational-, Are the tablets the proper s ze and type' Number of tubes in use? Is the level of chlorine residual acceptable? Is the contact chamber free of growth, or sludge buildup? Is there chlorine residual prior to de -chlorination? Comment. At domestic wastewater treatment plant. Owner • Facility: %layo Steam Electric Power Flant Inspection Type: Compliance Evaluation Yes No NA NE M ❑ ❑ ❑ ❑ ❑ ❑ 2 • ❑ ❑ ❑ • ❑ ❑ ❑ ❑ ❑ M ❑ pages 6