The URL can be used to link to this page

Home My WebLink AboutNC0000396_Draft Permit_20180722 • i 0 ....:. 4 w ---1 , ,, .r.o" , ' f ROY COOPER NORTH CAROLINA Governor Environmental Quality MICHAEL S.REGAN Secretary LINDA CULPEPPER Interim Director July 22, 2018 Mr. Paul Draovitch, Senior Vice President Environmental, Health and Safety Duke Energy Carolinas,LLC Mail Code EC13K P.O.Box 1006 Charlotte,North Carolina 28201-1006 Subject: Draft NPDES Permit Permit NC0000396 Asheville Steam Electric Plant Buncombe County Facility Class I Dear Mr. Draovitch: Enclosed with this letter is a copy of the draft permit for your facility. Please review the draft very carefully to ensure thorough understanding of the conditions and requirements it contains. The draft permit contains the following significant changes from your current permit: • The Technology Based Effluent Limit for Total Mercury was added to the permit (Outfall 001) and is based on the requirements of 40 CFR 125.3(a) ,40 CFR 122.44(a)(1); 40 CFR 125.3(c) and (d). • The Technology Based Effluent Limits for Total Mercury,Total Arsenic,Total Selenium, • and Nitrate/nitrite as N were added to the permit(Outfall 005) and are based on the requirements of 40 CFR 423. • The turbidity limit was added to the permit (Outfall 001) to meet the state turbidity standard per 15A NCAC 2B .0211(3) (k). • The daily maximum TSS limit for Outfall 001 was reduced from 100 mg/L to 50 mg/L to meet the requirements of 40 CFR 423. • An effluent page for Outfall 001 was modified to incorporate dewatering. • The Toe Drains Outfall (Outfall 101)was added to the permit. • The Clean Water Act Section 316(a) Thermal Variance Special Condition was updated to reflect the new regulations. Please see Special Condition A. (7.). £D_EQO NOM,CAROLINA opnan.W a Ernkaxn.I.l awl North Carolina Department of Environmental Quality I Division of Water Resources 512 North Salisbury Street 11611 Mail Service Center I Raleigh,North Carolina 27699-1611 919.707.9000 • The Clean Water Act Section 316(b) Special Condition was added to the permit. Please see Special Condition A. (8.). • The Structural Integrity Inspections of Ash Pond Dam Special Condition was added to the permit. Please see Special Condition A. (9.). • The Instream Monitoring Special Condition was added to the permit to monitor the impact of the facility on the receiving stream. Please see Special Condition A. (10.). • The Applicable State Law Special Condition was added to the permit to meet the requirements of Senate Bill 729 (Coal Ash Management Act). Please see Special Condition A. (11.). • The Fish Tissue Monitoring Near Ash Pond Discharge Special Condition was updated.Please see Special Condition A. (13.). • 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.The requirement to begin reporting discharge monitoring data electronically using the NC DWR's Electronic Discharge Monitoring Report (eDMR) internet application has been added to your final NPDES permit. [See Special Condition A. (14.)] For information on eDMR,registering for eDMR and obtaining an eDMR user account, please visit the following web page: http://deq.nc.gov/about/divisions/water- resources/edmr. For more information on EPA's final NPDES Electronic Reporting Rule,please visit the following web site: https://www.federalregistergov/documents/2015/10/22/2015-24954/national-pollutant- discharge-elimination-system-npdes-electronic-reporting-rule • The Additional Conditions and Definitions Special Condition was added to the permit. Please see Special Condition A. (15.). • Monitoring for Total Beryllium,Total Cadmium, Chlorides,Total Chromium,Fluoride, Total Lead,Total Manganese,Total Nickel,Total Silver, and Total Zinc was removed from the permit (Outfall 005) to be consistent with the requirements of 40 CFR 423. • The stormwater outfalls were deleted from the permit. The facility received a separate stormwater permit. • The Biocide Special Condition A. (16.) was added to the permit to be consistent with the permitting procedure for power plants. • The Special Condition entitled Compliance Boundary was added to the permit. Please see Special Condition A. (17.). • The monitoring frequency for Total Mercury,Total Arsenic,Total Selenium,Total Beryllium, Total Cadmium,Chlorides,Total Chromium,Total Copper,Total Fluoride,Total Lead,Total Nickel,Total Silver,Total Thallium,Total Zinc,and Chronic Toxicity were reduced to Weekly from Quarterly (Outfall 001). • The monitoring for Total Manganese was eliminated due to the removal of the Manganese state standard during the latest tri-annual review (Outfall 001). • The Selenium speciation special condition was removed from the permit. EQ.NQH1H CAROLINA Ogrwra d FwYamwrol 0.0trr North Carolina Department of Environmental Quality I Division of Water Resources 512 North Salisbury Street 11611 Mail Service Center I Raleigh,North Carolina 276991611 919.707.9000 Please provide any comments you have regarding the draft permit to this office by August 22,2018. At this time, the Division is also publishing a notice in the newspapers of general circulation in Buncombe County,inviting public comment on the draft major modification. Following the 30-day comment period,we will review all pertinent comments received and take appropriate action on the permit renewal. The NPDES Standard Conditions (Parts II, III,and IV) are not included with this draft. They can be found at the following link if you would like to review them in conjunction with this draft permit. http://ncdenr.s3.amazonaws.com/s3fs- public/Water%20Quality/Surface%20Water%20Protection/NPDES/MISC/NPDES%20Standard %20Conditions-Boilerplate-DWR-SWP-NPDES-20150410.pdf If you have any questions about the NPDES permit process,please contact me at the following e- mail address: sergei.chernikov(a,ncdenr.gov,or telephone number: 919-807-6386. Sincerely, Sergei Chernikov,Ph.D. Environmental Engineer II Complex NPDES Permitting Unit cc: NPDES Files EPA Region IV(e-copy) Asheville Regional Office/Surface Water Protection(e-copy) Aquatic Toxicology Unit(e-copy) TACU (e-copy) NORTH N W x I bE Q D oA.mmnn of errwomrnm(With North Carolina Department of Environmental Quality I Division of Water Resources 512 North Salisbury Street 11611 Mail Service Center I Raleigh,North Carolina 27699-1611 919.707.9000 Permit NC0000396 STATE OF NORTH CAROLINA DEPARTMENT OF ENVIRONMENTAL QUALITY DIVISION OF WATER RESOURCES Draft PERMIT TO DISCHARGE WASTEWATER UNDER THE NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM In compliance with the provisions of North Carolina General Statute 143-215.1, other lawful standards and regulations promulgated and adopted by the North Carolina Environmental Management Commission, and the Federal Water Pollution Control Act, as amended, Duke Energy Progress, LLC is hereby authorized to discharge wastewater from a facility located at the Asheville Steam Electric Plant 200 CP&L Drive Arden, North Carolina Buncombe County to receiving waters designated as the French Broad River, UT to French Broad River and Lake Julian in the French Broad River Basin in accordance with effluent limitations, monitoring requirements, and other applicable conditions set forth in Parts I, II, and III hereof. This permit shall become effective This permit and the authorization to discharge shall expire at midnight on Signed this day DRAFT Linda Culpepper, Interim Director Division of Water Resources By Authority of the Environmental Management Commission Page 1 of 16 Permit NC0000396 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. Duke Energy Progress, LLC is hereby authorized to: 1. Continue to operate the following systems located at Asheville Steam Electric Generating Plant, 200 CP&L Drive, Arden, Buncombe County: ■ Ash Pond 1964/Rim Ditch Treatment System(Outfall 001). Outfall 001 discharges directly to the French Broad River. The ash pond/rim ditch receives ash transport water, coal pile runoff, storm water runoff, groundwater, FGD wastewater, various low volume wastes (such as boiler blowdown,backwash from the water treatment processes, ash hopper seal water,plant drains), air preheater cleaning water and chemical metal cleaning wastewater discharged from Internal Outfall 004 (potentially) and Internal Outfall 005 (potentially). ■ Once Through Non-Contact Cooling Water System (Outfall 002). This waste stream is discharged directly to Lake Julian via Outfall 002. • Chemical Metal Cleaning Treatment System (Internal Outfall 004). This waste stream may occasionally be discharged via Internal Outfall 004 to the ash pond treatment system. Generally chemical metal cleaning wastes are treated by evaporation in boilers. • Flue Gas Desulfurization (FGD) wet scrubber wastewater treatment system, which will discharge to the secondary settling basin(after the Ash Pond)via internal Outfall 005 (with ultimate discharge via Outfall 001). The facility can also discharge the FGD wastewater to the local POTW. • 3 toe drains from 1964 ash pond combined into Outfall 101 (lat. 35.468, long.— 82.549); and 2. Discharge from said treatment works and/or outfalls at the locations specified on the attached map into the French Broad River(via Outfall 001),UT to French Broad River(via Outfall 101) and Lake Julian(via Outfall 002) classified as B waters (French Broad River and UT to French Broad River) and C waters (Lake Julian) in the French Broad River Basin. Page 2of16 Permit NC0000396 Part I A. (1.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS (Outfall 001-dewatering) [15A NCAC 02B .0400 et seq., 02B .0500 et seq.] During the period beginning the effective date of the permit and lasting until expiration, the Permittee is authorized to discharge from Outfall 001 (Ash Pond Treatment System, and Rim Ditch). Such discharges shall be limited and monitored2 by the Permittee as specified below: PARAMETER LIMITS MONITORING REQUIREMENTS Monthly Daily Measurement Sample Sample Average Maximum Frequency Type Location' Flow,MGD Weekly Instantaneous Effluent Oil and Grease 15.0 mg/L 20.0 mg/L Weekly Grab Effluent Total Suspended Solids' 30.0 mg/L 50.0 mg/L Weekly Grab Effluent pH' 6.0<_pH<9.0 Weekly Grab Effluent Total Mercury' 47.0 ng/L Weekly Grab Effluent Total Arsenic, µg/L Weekly Grab Effluent Total Selenium, µg/L Weekly Grab Effluent Total Beryllium, µg/L Weekly Grab Effluent Total Cadmium, µg/L Weekly Grab Effluent Chlorides,mg/L Weekly Grab Effluent Total Chromium, µg/L Weekly Grab Effluent Total Copper, µg/L Weekly Grab Effluent Total Fluoride,mg/L Weekly Grab Effluent Total Lead, µg/L Weekly Grab Effluent Total Nickel, µg/L Weekly Grab Effluent Total Silver, µg/L Weekly Grab Effluent Total Zinc, µg/L Weekly Grab Effluent Total Nitrogen Monthly Effluent (NO2+NO3+TKN),mg/L Grab Total Phosphorus,mg/L Monthly Grab Effluent Chronic Toxicity4 Monthly Grab Effluent Turbidity',NTU Weekly Grab Effluent Notes: 1. Sample locations: Effluent. 2. Please see Special Condition A. (14.). 3. The facility shall use EPA method 1631E. The limit is an annual average limit based on a calendar year. 4. Chronic Toxicity Limit (Ceriodaphnia dubia) at 1.8%; See Special Condition A. (6.). 5. The discharge from this facility shall not cause turbidity in the receiving stream to exceed 50 NTU. If the instream turbidity exceeds 50 NTU due to natural background conditions, the discharge cannot cause turbidity to increase in the receiving stream. Therefore, if the effluent measurement exceeds 50 NTU, the Permittee shall sample upstream and downstream turbidity in the receiving waterbody, within 24 hours, to demonstrate the existing turbidity level in the receiving waterbody was not increased. All data shall be reported on the DMRs. (See 15A NCAC 2B .0211 (21)). 6. The facility shall continuously monitor TSS concentration and the dewatering pump shall be shutoff automatically when the one half of the Daily Maximum limit (15 minutes average) is exceeded. Pumping will be allowed to continue if interruption might result in a dam failure or Page 3 of 16 Permit NC0000396 damage. The continuous TSS monitoring is only required when the pumps are employed for dewatering. 7. The facility shall continuously monitor pH and the dewatering pump shall be shutoff automatically when the 15 minutes running average pH falls below 6.1 standard units or rises above 8.9 standard units. Pumping will be allowed to continue if interruption might result in a dam failure or damage. The continuous pH monitoring is only required when the pumps are employed for dewatering. There shall be no discharge of floating solids or visible foam in other than trace amounts. There shall be no discharge of polychlorinated biphenyl compounds such as those commonly used for transformer fluid. If one of the pollutants (As, Se, Hg, Ni, and Pb) reaches 85% of the allowable level during the decanting/dewatering, the facility shall immediately discontinue discharge of the wastewater and report it to the Regional Office and Complex NPDES Permitting Branch via telephone and e-mail. The rate for lowering the liquid level in a coal ash pond shall not exceed one (1) foot per day unless a higher rate is supported to the satisfaction of DEMLR and in accordance with NCAC, Title 15A, Subchapter 2K. By January 31, 2020 there shall be no discharge of pollutants in fly ash transport water. This requirement only applies to fly ash transport water generated after January 31, 2020. By January 31, 2020 there shall be no discharge of pollutants in bottom ash transport water. This requirement only applies to bottom ash transport water generated after January 31, 2020. The facility shall treat the wastewater discharged from the ash pond using physical- chemical treatment, if necessary, to assure state Water Quality Standards are not contravened in the receiving stream. Duke Energy shall notify DWR NPDES Permitting and DWR Asheville Regional Office, in writing,within seven calendar days of installing additional physical-chemical treatment at this Outfall. Page 4 of 16 Permit NC0000396 A. (2.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS (Outfall 002) [15A NCAC 02B .0400 et seq., 02B .0500 et seq.] During the period beginning on the effective date of the permit and lasting until expiration,the Permittee is authorized to discharge from Outfall 002 (Once Through Cooling Water). Such discharges shall be limited and monitored3 by the Permittee as specified below: PARAMETER LIMITS MONITORING REQUIREMENTS Monthly Maximum Measurement Sample Sample Average Frequency Type Location' Flow,MGD Daily Pump Logs Effluent Total Residual Chlorine2 200µg/L Daily Grab Effluent Time of Chlorine 2 hours Daily Logs Effluent Addition Temperature 44.4°C Daily Recorder Effluent pH 6.0 IS pH<9.0 Weekly Grab Effluent Notes: 1. Sample locations: Effluent. 2. Total residual chlorine shall not be discharged from any single generating unit for more than two hours per day,unless the Permittee demonstrates to the Division of Water Resources that discharge for more than two hours is required for macroinvertebrate control. The 200 .tg/L limitation is an instantaneous maximum effluent limitation defined as the value which shall not be exceeded at any time, and is to be measured during the chlorine release period. If the chlorine release period is programmed for multiple intervals per day, sampling is required only during one representative interval per day. Simultaneous multi-unit chlorination is permitted. Monitoring for total residual chlorine is required only if chlorine is added to the system. 3. Please see Special Condition A. (14.). The mixing zone has been defined as all of Lake Julian. Based upon studies conducted by the permittee and submitted to the Division, it has been determined pursuant to Section 316(a)of the Clean Water Act that the thermal component of the discharge assures the protection and propagation of a balanced, indigenous population of shellfish, fish and wildlife in the receiving water body. There shall be no chromium, zinc, or copper added to the discharge except as pre-approved additives to biocidal compounds. There shall be no discharge of polychlorinated biphenyl compounds such as those commonly used for transformer fluid. There shall be no discharge of floating solids or visible foam in other than trace amounts. Page 5 of 16 Permit NC0000396 A. (3.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS (Outfall 004) [15A NCAC 02B .0400 et seq., 02B .0500 et seq.] During the period beginning on the effective date of the permit and lasting until expiration,the Permittee is authorized to discharge from Internal Outfall 004 (Chemical Metal Cleaning Treatment System). Such discharges shall be limited and monitored2 by the Permittee as specified below: PARAMETER LIMITS MONITORING REQUIREMENTS Monthly Daily Measurement Sample Sample Average Maximum Frequency Type Location' Flow,MGD Per discharge event Instantaneous Effluent Total Copper 1.0 mg/L 1.0 mg/L Per discharge event Grab Effluent Total Iron 1.0 mg/L 1.0 mg/L Per discharge event Grab Effluent Notes: 1. Sample locations: Effluent,prior to mixing with any other waste stream. 2. Please see Special Condition A. (14.). The chemical metal cleaning waste shall be discharged after pretreatment. There shall be no discharge of polychlorinated biphenyl compounds such as those commonly used for transformer fluid. There shall be no discharge of floating solids or visible foam in other than trace amounts. Page 6 of 16 Permit NC0000396 A. (4.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS (Outfall 005) [15A NCAC 02B .0400 et seq., 02B .0500 et seq.] During the period beginning the effective date of this permit and lasting until expiration, the Permittee is authorized to discharge from Internal Outfall 005 (treated FGD wet scrubber wastewater). Such discharges shall be limited and monitored2 by the Permittee as specified below: PARAMETER LIMITS MONITORING REQUIREMENTS Monthly Daily Measurement Sample Sample Average Maximum Frequency Type Location' Flow,MGD Monthly Instantaneous Effluent Total Suspended Solids,mg/L Monthly Grab Effluent Total Mercury2,ng/L 356.0 ng/L4 788.0 ng/L4 Quarterly Grab Effluent Total Arsenic 8.0µg/L4 11.0µg/L4 Quarterly Grab Effluent Total Selenium 12.0µg/L4 23.0 ttg/L4 Quarterly Grab Effluent Nitrate/nitrite as N 4.4 mg/L4 17.0 mg/L4 Quarterly Grab Effluent Notes: 1. Sample locations: Effluent from the physical-chemical treatment system. 2. The facility shall use EPA method 1631E. 3. Please see Special Condition A. (14.). 4. In accord with the Steam Electric Effluent Limitations Guidelines for FGD wastewater(40 C.F.R. 423),these limits shall become effective on January 31, 2020. This permit may be reopened and modified if changes are made to 40 C.F.R. 423. The facility can also discharge the FGD wastewater to the local POTW. Page 7 of 16 Permit NC0000396 A. (5.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS (Outfall 101) [15A NCAC 02B .0400 et seq., 02B .0500 et seq.] During the period beginning on the effective date of this permit and lasting until expiration,the Permittee is authorized to discharge from Outfall 101 —Toe Drain effluent(1964 pond 3 toe drains). Such discharges shall be limited and monitored' by the Permittee as specified below: PARAMETER LIMITS MONITORING REQUIREMENTS Monthly Daily Measurement Sample Sample Average Maximum Frequency' Type Location Flow,MGD Monthly/Quarterly Estimate Effluent pH3 Monthly/Quarterly Grab Effluent TSS 30.0 mg/L 100.0 mg/L Monthly/Quarterly Grab Effluent Oil and Grease 15.0 mg/L 20.0 mg/L Monthly/Quarterly Grab Effluent Fluoride,mg/L Monthly/Quarterly Grab Effluent _ Total Mercury',ng/L Monthly/Quarterly Grab Effluent _ Total Barium,mg/L Monthly/Quarterly Grab Effluent _ Total Zinc 125.7µg/L 125.7µg/L Monthly/Quarterly Grab Effluent Total Arsenic, µg/L Monthly/Quarterly Grab Effluent Total Boron, µg/L Monthly/Quarterly Grab Effluent Total Cadmium,µg/L Monthly/Quarterly Grab Effluent Total Chromium, µg/L Monthly/Quarterly Grab Effluent Total Copper, µg/L Monthly/Quarterly Grab Effluent Total Thallium,µg/L Monthly/Quarterly Grab Effluent Total Lead,µg/L Monthly/Quarterly Grab Effluent Total Nickel 25.0µg/L 335.2 µg/L Monthly/Quarterly Grab Effluent Total Selenium 5.0µg/L 56.0µg/L Monthly/Quarterly Grab Effluent _ Nitrate/nitrite as N,mg/L Monthly/Quarterly Grab Effluent Sulfates,mg/L Monthly/Quarterly Grab Effluent Chlorides 230.0 mg/L 230.0 mg/L Monthly/Quarterly Grab Effluent TDS,mg/L Monthly/Quarterly Grab Effluent Total Hardness,mg/L Monthly/Quarterly Grab Effluent Temperature,°C Monthly/Quarterly Grab Effluent Conductivity,µmho/cm Monthly/Quarterly Grab Effluent Notes: 1. Please See Special Condition A. (14.). 2. The facility shall conduct monthly sampling from the effective date of the permit. After one year from the effective date of the permit the monitoring will be reduced to quarterly. 3. The pH shall not be less than 6.0 standard units nor greater than 9.0 standard units. 4. The facility shall use EPA method 1631 E. If no discharge occurs during the reporting period or the Permittee is unable to obtain a representative sample due to low-flow conditions at the seep,the Permittee shall submit its DMR, as required, and indicate"No Flow"for the seep (15A NCAC 02B .0506(a)(1)(E)). There shall be no discharge of floating solids or visible foam in other than trace amounts. Page 8 of 16 Permit NC0000396 A. (6.) CHRONIC TOXICITY PERMIT LIMIT (Outfall 001) [15A NCAC 02B .0200 et seq.] The effluent discharge shall at no time exhibit observable inhibition of reproduction or significant mortality to Ceriodaphnia dubia at an effluent concentration of 1.8 %. The permit holder shall perform at a minimum, monthly monitoring using test procedures outlined in the"North Carolina Ceriodaphnia Chronic Effluent Bioassay Procedure,"Revised December 2010, or subsequent versions or"North Carolina Phase II Chronic Whole Effluent Toxicity Test Procedure"(Revised-December 2010)or subsequent versions. Effluent sampling for this testing must be obtained during representative effluent discharge and shall be performed at the NPDES permitted final effluent discharge below all treatment processes. If the test procedure performed as the first test of any month results in a failure or ChV below the permit limit, then multiple-concentration testing shall be performed at a minimum,in each of the two following months as described in"North Carolina Phase II Chronic Whole Effluent Toxicity Test Procedure" (Revised-December 2010) or subsequent versions. All toxicity testing results required as part of this permit condition will be entered on the Effluent Discharge Monitoring Form(MR-1) for the months in which tests were performed,using the parameter code TGP3B for the pass/fail results and THP3B for the Chronic Value. Additionally, DWR Form AT-3 (original)is to be sent to the following address: Attention: North Carolina Division of Water Resources Water Sciences Section/Aquatic Toxicology Branch 1621 Mail Service Center Raleigh,North Carolina 27699-1621 Completed Aquatic Toxicity Test Forms shall be filed with the Water Sciences Section no later than 30 days after the end of the reporting period for which the report is made. Test data shall be complete, accurate, include all supporting chemical/physical measurements and all concentration/response data, and be certified by laboratory supervisor and ORC or approved designate signature. Total residual chlorine of the effluent toxicity sample must be measured and reported if chlorine is employed for disinfection of the waste stream. Should there be no discharge of flow from the facility during a month in which toxicity monitoring is required,the permittee will complete the information located at the top of the aquatic toxicity(AT)test form indicating the facility name,permit number,pipe number, county, and the month/year of the report with the notation of"No Flow"in the comment area of the form. The report shall be submitted to the Water Sciences Section at the address cited above. Should the permittee fail to monitor during amonth in which toxicitymonitoringis required, , monitoring will be required during the following month. Assessment of toxicity compliance is based on the toxicity testing quarter, which is the three month time interval that begins on the first day of the month in which toxicity testing is required by this permit and continues until the final day of the third month. Page 9 of 16 Permit NC0000396 Should any test data from this monitoring requirement or tests performed by the North Carolina Division of Water Resources indicate potential impacts to.the receiving stream,this permit may be re-opened and modified to include alternate monitoring requirements or limits. NOTE: Failure to achieve test conditions as specified in the cited document, such as minimum control organism survival,minimum control organism reproduction, and appropriate environmental controls, shall constitute an invalid test and will require immediate follow-up testing to be completed no later than the last day of the month following the month of the initial monitoring. A. (7.) CLEAN WATER ACT SECTION 316(a) THERMAL VARIANCE [40 CFR 125, Subpart H] The thermal variance granted under Section 316(a)terminates on expiration of this NPDES permit. Should the permittee wish a continuation of its 316(a)thermal variance beyond the term of this permit,reapplication for such continuation shall be submitted in accordance with 40 CFR Part 125, Subpart H and Section 122.21(m)(6)not later than 180 days prior to permit expiration. Reapplication shall include a basis for continuation such as a)plant operating conditions and load factors are unchanged and are expected to remain so for the term of the reissued permit; b) there are no changes to plant discharges or other discharges in the plant site area which could interact with the thermal discharges; and c)there are no changes to the biotic community of the receiving water body which would impact the previous variance determination. The next 316(a) studies shall be performed in accordance with the Division of Water Resources approved plan. The temperature analysis and the balanced and indigenous study plan shall conform to the specifications outlined in 40 CFR 125 Subpart H, the EPA's Draft 316(a) Guidance Manual, dated 1977, and the Region 4 letter to NCDENR, dated June 3, 2010. EPA shall be provided an opportunity to review the plan prior to the commencement of the study. Copies of all the study plans, study results, and any other applicable materials should be submitted to: 1) Electronic Version ersion Only(pdf and CD) Division of Water Resources WQ Permitting Section-NPDES 1617 Mail Service Center Raleigh,NC 27699-1617 2) Electronic Version(pdf and CD) and Hard Copy Division of Water Resources Water Sciences Section 1623 Mail Service Center Raleigh,NC 27699-1623 A. (8.) CLEAN WATER ACT SECTION 316(b) [40 CFR 125.95] Page 10 of 16 Permit NC0000396 The permittee shall comply with the Cooling Water Intake Structure Rule per 40 CFR 125.95. The permittee shall submit all the materials required by the Rule with the next renewal application. Copies of all the study plans, study results, and any other applicable materials should be submitted to: 1) Electronic Version Only(pdf and CD) Division of Water Resources WQ Permitting Section-NPDES 1617 Mail Service Center Raleigh,NC 27699-1617 2) Electronic Version(pdf and CD) and Hard Copy Division of Water Resources Water Sciences Section 1621 Mail Service Center Raleigh,NC 27699-1621 Pursuit to 40 CFR 125.98 the Director has determined that operating and maintaining the existing cooling system meets the requirements for an interim BTA. The permittee shall submit all the materials required by the 316(b) Rule 180 days before the planned commencement of cooling water withdrawals for the operation of the new unit. Nothing in this permit authorizes take for the purposes of a facility's compliance with the Endangered Species Act. A. (9.) STRUCTURAL INTEGRITY INSPECTIONS OF ASH POND DAM [15A NCAC 02K.0208] The facility shall meet the dam design and dam safety requirements per 15A NCAC 2K. A. (10.)INSTREAM MONITORING (Outfall 001) [15A NCAC 02B.0500 ET SEQ.] The facility shall conduct monthly in-stream monitoring (5,500 ft. upstream and 2,900 ft. downstream of the Outfall 001) for total arsenic, total selenium, total mercury, total chromium, dissolved lead,dissolved cadmium,dissolved copper,dissolved zinc,total bromide,total hardness (as CaCO3),temperature,turbidity, and total dissolved solids(TDS). The monitoring results shall be reported on the facility's Discharge Monitoring Reports and included with the NPDES permit renewal application. A. (11.)APPLICABLE STATE LAW (State Enforceable Only) [NCGS 143-215.1(b)] This facility shall meet the General Statute requirements under NCGS § 130A-309.200 et seq. This permit may be reopened to include new requirements imposed under these Statutes. Page 11 of 16 Permit NC0000396 A. (12.) TOXICITY RE-OPENER CONDITION [NCGS 143-215.1(b)] This permit shall be modified, or revoked and reissued to incorporate toxicity limitations and monitoring requirements in the event toxicity testing or other studies conducted on the effluent or receiving stream indicate that detrimental effects may be expected in the receiving stream as a result of this discharge. A. (13.) FISH TISSUE MONITORING NEAR ASH POND DISCHARGE (Outfall 001) [NCGS 143-215.3 (a) (2)] The facility shall conduct fish tissue monitoring annually and submit the results with the NPDES permit renewal application. The objective of this monitoring is to evaluate potential uptake of pollutants by fish tissue near the ash pond discharge. The parameters analyzed in fish tissue shall include arsenic, selenium, and mercury.The monitoring shall be conducted in accordance with the sampling plan approved by the Division. The plan should be submitted to the Division within 180 days from the effective date of the permit. Upon approval, the plan becomes an enforceable part of the permit. Copies of all the study plans, study results, and any other applicable materials should be submitted to: 1) Electronic Version Only(pdf and CD) Division of Water Resources WQ Permitting Section-NPDES 1617 Mail Service Center Raleigh,NC 27699-1617 2) Electronic Version(pdf and CD) and Hard Copy Division of Water Resources Water Sciences Section 1621 Mail Service Center Raleigh,NC 27699-1621 A. (14.) ELECTRONIC REPORTING OF 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 Page 12 of 16 Permit NC0000396 • Section D. (6.) Records Retention • Section E. (5.) Monitoring Reports 1. Reporting Requirements [Supersedes Section D. (2.) and Section E. (5.) (a)1 The permittee shall report discharge monitoring data electronically using the NC DWR's Electronic Discharge Monitoring Report(eDMR) internet application. Monitoring results obtained during the previous month(s) shall be summarized for each month and submitted electronically using eDMR. The eDMR system allows permitted facilities to enter monitoring data and submit DMRs electronically using the internet. Until such time that the state's eDMR application is compliant with EPA's Cross-Media Electronic Reporting Regulation(CROMERR),permittees will be required to submit all discharge monitoring data to the state electronically using eDMR and will be required to complete the eDMR submission by printing, signing, and submitting one signed original and a copy of the computer printed eDMR to the following address: NC DENR/Division of Water Resources/Water Quality Permitting Section ATTENTION: Central Files 1617 Mail Service Center Raleigh,North Carolina 27699-1617 If a permittee is unable to use the eDMR system due to a demonstrated hardship or due to the facility being physically located in an area where less than 10 percent of the households have broadband access, then a temporary waiver from the NPDES 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 mailing address above. See"How to Request a Waiver from Electronic Reporting" section below. 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, 2020, the permittee must electronically report the following compliance monitoring data and reports, when applicable: • 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 Page 13 of 16 Permit NC0000396 In accordance with 40 CFR 122.41(1)(9), the permittee must identify the 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 NPDES-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 electronic reporting tool for each type of electronic submission and for each state. Instructions on how to access and use the appropriate electronic reporting tool will be available as well. Information on EPA's NPDES Electronic Reporting Rule is found at: http://www2.epa.gov/compliance/final- national-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 submit an electronic reporting waiver request to the Division. Requests for temporary electronic reporting waivers must be submitted in writing to the Division for written approval at least sixty(60) days prior to the date the facility would be required under this permit to begin submitting monitoring data and reports. The duration of a temporary waiver shall not exceed 5 years and shall thereupon expire. At such time,monitoring data and reports shall be submitted electronically to the Division unless the permittee re-applies for and is granted a new temporary electronic reporting waiver by the Division. Approved electronic reporting waivers are not transferrable. Only permittees with an approved reporting waiver request may submit monitoring data and reports on paper to the Division for the period that the approved reporting waiver request is effective. Information on eDMR and the application for a temporary electronic reporting waiver are found on the following web page: http://deq.nc.gov/about/divisions/water-resources/edmr 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 Page 14 of 16 Permit NC0000396 North Carolina's eDMR system,registering for eDMR and obtaining an eDMR user account, please visit the following web page: http://deq.nc.gov/about/divisions/water-resources/edmr Certification. Any person submitting an electronic DMR using the state's eDMR system shall make the following certification [40 CFR 122.22]. NO OTHER STATEMENTS OF CERTIFICATION WILL BE ACCEPTED: "I certify, under penalty of law, that this document and all attachments were prepared under my direction or supervision in accordance with a system designed to assure that qualified personnel properly gather and evaluate the information submitted. Based on my inquiry of the person or persons who manage the system, or those persons directly responsible for gathering the information, the information submitted is, to the best of my knowledge and belief true, accurate, and complete. I am aware that there are significant penalties for submitting false information, including the possibility of fines and imprisonment for knowing violations." 5. Records Retention [Supplements Section D. (6.11 The permittee shall retain records of all Discharge Monitoring Reports, including eDMR submissions. These records or copies shall be maintained for a period of at least 3 years from the date of the report. This period may be extended by request of the Director at any time [40 CFR 122.41]. A. (15.)ADDITIONAL CONDITIONS AND DEFINITIONS [NCGS 143-215.3 (a) (2) and NCGS 143-215.66] 1. EPA methods 200.7 or 200.8 (or the most current versions) shall be used for analyses of all metals except for total mercury(EPA Method 1631 E). 2. All effluent samples for all external outfalls shall be taken at the most accessible location after the final treatment but prior to discharge to waters of the U.S. (40 CFR 122.41(j)). 3. The term low volume waste sources mean wastewater from all sources except those for which specific limitations are otherwise established in this part(40 CFR 423.11 (b)). 4. The term chemical metal cleaning waste means any wastewater resulting from cleaning any metal process equipment with chemical compounds, including,but not limited to, boiler tube cleaning(40 CFR 423.11 (c)). 5. The term metal cleaning waste means any wastewater resulting from cleaning [with or without chemical cleaning compounds] any metal process equipment including,but not limited to,boiler tube cleaning,boiler fireside cleaning, and air preheater cleaning(40 CFR 423.11 (d)). 6. For all outfalls where the flow measurement is to be"estimated"the estimate can be done by using calibrated V-notch weir, stop-watch and graduated cylinder, or other method approved by the Division. 7. The term "FGD wet scrubber wastewater" means wastewater resulting from the use of the flue-gas desulfurization wet scrubber. 8. There shall be no discharge of polychlorinated biphenyl compounds. Page 15 of 16 Permit NC0000396 9. The permittee shall report the presence of cenospheres observed in any samples on the DMRs in the comment section. 10. Nothing contained in this permit shall be construed as a waiver by the permittee of any right to a hearing it may have pursuant to State or Federal laws and regulations. A. (16.) BIOCIDE CONDITION [NCGS 143-215.1] The permittee shall not use any biocides except those approved in conjunction with the permit application. The permittee shall notify the Director in writing not later than ninety(90)days prior to instituting use of any additional biocide used in cooling systems which may be toxic to aquatic life other than those previously reported to the Division of Water Resources. Such notification shall include completion of Biocide Worksheet Form 101 and a map locating the discharge point and receiving stream. Completion of Biocide Worksheet Form 101 is not necessary for those outfalls containing toxicity testing. Division approval is not necessary for the introduction of new biocides into outfalls currently tested for whole effluent toxicity. A. (17.) COMPLIANCE BOUNDARY [15A NCAC 02L.0107] The compliance boundary for the disposal system shall be specified in accordance with 15A NCAC 02L .0107(a) or(b) dependent upon the date permitted. An exceedance of groundwater standards at or beyond the compliance boundary is subject to remediation action according to 15A NCAC 02L .0106(c), (d), or(e) as well as enforcement actions in accordance with North Carolina General Statute 143-215.6A through 143-215.6C. The compliance boundary map for this facility is incorporated herein and attached hereto as Attachment A. Page 16 of 16 1L--�._- - �U \ �/"`',j�' 1 -''',• .,,_ .gym sir- ,, \\\.‘„ ie \ % \ ---)1\JI ) IV • •139/ -- iii, ti-‘,..„, • 1 • -u -� /"- • ' ••ers, mow• O itirL......,,,, r /•• • Z (INt: , \\\\\ • ..e% I // �. '- �l+h 2� s, •., `ll � 114-44:4-: 11.-' ,/ U0 1 • ..) ..... .....„04 am ---,, r.,•-!--„,...i . 1- y :-.----'-1.1 ,._ 70:7; -,,,?;/- u ;tr _ , .4r ,, _,./ i , r------1---,---;------ i Pr "...4.-::\-::\v/ lc,r� � ,�. --;' � "7-it r \ ),,, .\,,_ . ,___) l .____,Eit,,,11,,,, -.,.\ _ io 5- „,,:: ,,,, if, .,,,,,, ,,f, r__, a ...,. ..._../r. //er_ei---..., � `/1 t , ,_ s-1 J r. t �/ t'/ _ rn, 1 / t i /.r I di r Jit •L) , _i,,..__ .( , -`-�.- ,� 1iA+ %c3 \ ' •� n � J ,,,t ii ter. r�• �j -7.� /-77%,"---,.11,\: .,• _ \ �� `Hun! ,. .-__------ NI - -- ‘ 1 -,- \\ ji\ -;,..,-\----- - '‘ J ' i / -.‘,-."--V : \r\ (, ii *;b \ r ,_ ., .•,,,.. f"%-SUbStittio/K.:Ii:;— ... ,- .•N, , ) � - f 9) ) �� (,..\\ Ire \ ,/ . .--00. • • -,-_ __ _1 aryl lany i �\ f,) 7 ' - 1 \ ,Co I pile(, i E \t \ /:- ilelk-----jilt711W14 41'c i s- '{- fit A . J1 i \\ \\\%. ,.., ‘ • \ to 1 +;_.....),11,4y \ \ ti \\ Irv: .��, a 1115 \j .� ii{l :� _ .‘./Lioili -- .\ „vorti"i - � ..,.....,?) ,, ., 07,1,.. .),---- -itt_t_,\...4Lie leimisn....\ ' 75\tA _11:) ' "' , ' ..--' \(,74.1 , _ k :',R6-;-\'''-#11 ' / . No-17- -,..t.:_-::,,,,, , . - --- ....7..:._ -Nt.,47,. •, ,'''',2 0 '''''I c-- \ ,,,,,P- ` l' ,i__ .\ • \Ors— ----- , t l � ir / \ 9 ,,,, --, ....N.s...;-_---:9 , -. 4) \ I / ic( f \::: -7\71 1‘.--- q'") I 1 )441A I \ \\1 s L.:. \ % \ (L---, )—.) • • . •4 ,.. ' ,--ly. ...,, ,: t \\Y- 71/7///. ‘ .tvrii/ 7 0_,S Irv...*\ \ ,')/ \ t\, ) ). - . *rt "11/4\ : - , 0 •: ' r .._. ,, _ t::......„.„..H.,,,,,,(,:,...4.1v,_, ,-- ,wi .., '34)00 (in I • '‘' \ 204• ,--� yl—e, ,,,e10 ...R /jam , • �f / 1 { \1\ • • • Outfall 001, Subbasin: 04-03-02 Latitude: 35°28'03" Facility Longitude: 82°32'56" -----;,. a=° Receiving Stream: French Broad River, Class BLocation Outfall 002, Subbasin: 04-03-02 Latitude: 35°28'10" Longitude: 82°32'20" Receiving Stream: Lake Julian, Class C NC0000396 -Asheville Steam Electric Gen. Plant Buncombe County Attachment A 1.AERIAL PHOTOGRAPHY OBTAINED FROMOOOGIE EARTH PRD .-` *__t_, +� . ONSEPTEMBER 11.2017.AERIAL DATED OCTOBER4]DE6 w '"it •'''.. A •y} r�.w' " err, • �4 �P . .-•-.-i_41.-1* -...--- - ''. . ,E,.. .4.4,,,j ,...,..74144 ,-_,- ' ....' '' K d • `. !4. ' Z t ,,S t,..". �. �• r LAKE JULIAN 3�'e C ..:..:4,-.-. ` 1 • y \ \ i l 1� • • ` _ ^p 5. X1964 ASH BASIN ..x z' • 4 `; � - - '' � A., ate'.. i. _ 1t F - -- 1tAJYwYlYIL:lw:JllJ µ 4:0 �}y� \ w. »y.' ' '_. . . r a._. X13 • .. . .. ' 200 tao o zoo 400 '`t�. �� fs Isadir 4J` rL •,..,iT.. '• rdGURd•= R LEGEND `• •�,•'� '• ' OMPeGSGLENiEFi WASTE AND COMPLIANCE BOUNDARIES •` .'• `• F 004 RNER STIIEET• SURE 22U ASH BASIN WASTE BOUNDARY , cREENVRLE 21 0NN GLwAxwGv ASHEVILLE STEAM ELECTRIC PLANT PM0"E88Me11BP°R DUKE ENERGY PROGRESS,LLC _ - ASH BASIN COMPLIANCE BOUNDARY •'�' '\ s Terra ARDEN,NORTH CAROLINA rPLANT BOUNDARY _ '+J� Ecuoe.a..,.,, GrE.P��or,A,„ •A Rwr.EnA.rr®....re,neoo u.s umm..nwram Au.Irescswnmr•sai.n m�amRR m.a