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Home My WebLink AboutNCG500131_Complete file-historical_20160308WaterResources ENVIRONMENTAL QUALITY Mr. Nob Zalme Duke Energy Carolinas 2818 South Main Street Concord, NC 28027 Dear Mr. Zalme: PAT MCCRORY Go"Wr DONALD R. VAN DER VAART se" y S. JAY ZIMMERMAN Director March 8, 2016 RECEIVEDINCDEWWR MAR 15 2016 Water Quality Permitting Section Subject: Compliance Evaluation Inspection Mountain Island Hydrologic Station NPDES Permit No. NCG500131 Mecklenburg County, NC Enclosed is a copy of the Compliance Evaluation Inspection for the inspection conducted at the subject facility on March 7, 2016 by Ori Tuvia and Ed Watson. Your cooperation during the site visit was much appreciated. Please advise the staff involved with this NPDES Permit by forwarding a copy of the enclosed repo The report should be self-explanatory; however, should you have any questions concerning this report, please do not hesitate to contact Ori Tuvia at (704) 235-2190, or at ori.tuvig@ncdenr.gov. Cc: NPDES MRO Files Sincerely, Ori Tuvia, Environmental Engineer Mooresville Regional Office Division of Water Resources, DEQ Mooresville Regional Office Location: 610 East Center Ave., Suite 301 Mooresville, NC 28115 Phone: (704) 663-1699 \Fax (704) 663-6040 \ Customer Service: 1-877-623-6748 United States Environmental Protection Agency Form Approved. EPA Washington, D.C. 204W OMB No. 204MO57 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 U 2 LJ 3 I NCG500131 111 12 16/03/07 17 181 C ( 19 I ! I 20 L] 2111111111111111111111111111111II III11.1111 r6 Inspection Work Days Facility Self -Monitoring Evaluation Rating B1 QA Reserved 67 1.o 701d I 71 I„ i 72 [_!.j 731 I 174 751 I 111 1 1 80 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 Derrnit Number) 11:45AM 16/03/07 16/01/19 Mountain Island Hydroelectric Station Exit TimelDate Permit Expiration Date 439 Mountain Island Rd Mount Holly NC 28120 01:30PM 16/03/07 20/07/31 Name(s) of Onsite Representative(s)/Titles(s)/Phone and Fax Number(s) Other Facility Data 111 Melanie Gardner/// Nob Zalme//336462-0221 / Name, Address of Responsible OffciallTitle/Phone and Fax Number Contacted W Marcus Pi1ts,41 Mountain Farm Ln Tuckasegee NC 28783//864-304-9703/ No Section C: Areas Evaluated During Inspection (Check only those areas evaluated) Permit N Flow Measurement Operations & Maintenance Records/Reports Self -Monitoring Program Facility Site Review 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 Slgnature(s) of Inspector(s) Agency/Office/Phone and Fax Numbers Data Od A Tuvia MRO WQIR04-663-1699/ EIF116 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# NPDES yr/mo/day Inspection Type 3I NCG500131 I11 12 16/03/07 17 18 I C I Section D: Summary of Finding/Comments (Attach additional sheets of narrative and checklists as necessary) Page# I Permit: NCG500131 Owner -Facility: Mountain Island Hydroelectric Station Inspection Date: 03/07/2016 Inspection Type: Compliance Evaluation Permit Yes No NA NE (If the present permit expires in 6 months or less). Has the permittee submitted a new ❑ ❑ M ❑ application? Is the facility as described in the permit? 0 ❑ ❑ ❑ # Are there any special conditions for the permit? ❑ M ❑ ❑ Is access to the plant site restricted to the general public? 0 ❑ ❑ ❑ Is the inspector granted access to all areas for inspection? 0 ❑ ❑ ❑ Comment: Permit was renewed on 1/19/2016. The facility has four discharge outfalls that discharge non -contact cooling water at the base of the dam from the four electric generation units/systems. No biocides or corrosion inhibitors are added. The facility staff currently collect one sample (outfall locations/base of the dam) as a representative of all discharges. Record Keeiping Yes No NA NE Are records kept and maintained as required by the permit? ❑ ❑ ❑ Is all required information readily available, complete and current? 0 ❑ ❑ ❑ Are all records maintained for 3 years (lab. reg. required 5 years)? ❑ ❑ ❑ 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? ❑ ❑ ❑ Has the facility submitted its annual compliance report to users and DWQ? ❑ ❑ ❑ (If the facility is = or > 5 MGD permitted flow) Do they operate 24/7 with a certified operator ❑ ❑ M ❑ 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? ❑ ❑ M ❑ Is the backup operator certified at one grade less or greater than the facility classification? ❑ ❑ M ❑ Is a copy of the current NPDES permit available on site? ❑ ❑ ❑ Facility has copy of previous year's Annual Report on file for review? ❑ ❑ 0 ❑ Comment: The records reviewed during the inspection were organized and well maintained. Effluent_ and instream monitoring data, Calibration logs and COC were reviewed for 2013 - 2015. No effluent limit violations and/or instream temperature exceedances were reported. Page# 3 Permit: NCG500131 Inspection Date: 03/07/2016 Record Keep i n q Owner -Facility: Mountain Island Hydroelectric Station Inspection Type: Compliance Evaluation Laboratory 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? Yes No NA NE Yes No NA NE ■❑❑❑ ■ ❑ ❑ ❑ ■❑ ❑❑ ■❑ ❑❑ Comment: Oil and grease samples are analyzed by Duke Analytical Lab (certification #99005). PH is sampled on -site PH meter is calibrated prior to sampling. 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)? ❑ ❑ N ❑ ❑ ❑ ■ ❑ Yes No NA NE ❑ ❑ ❑ N ❑ ❑ ❑ ❑ ❑ ❑ ■ ■ ❑ ❑ ❑ N ❑ ❑ ❑ Comment: Effluent samples for temperature, pH, oil & grease, and a totalized flow measurement were collected/measured on a quarterly basis. Equalization Basins Is the basin aerated? Is the basin free of bypass lines or structures to the natural environment? Is the basin free of excessive grease? Are all pumps present? Are all pumps operable? Are float controls operable? Are audible and visual alarms operable? # Is basin size/volume adequate? Yes No NA NE ❑❑a❑ ❑ ❑ ■ ❑ ❑ ❑ ■ ❑ ❑ ❑ ■ ❑ ■ ❑ ❑ ❑ ■❑❑❑ ■❑❑❑ N ❑ ❑ ❑ Comment: Any oil and grease that has leaked into the system goes through a drainage system into the tank. Incase oil has leaked, the tank will be pumped by Haz-Met. Page# 4 5 Permit: NCG500131 Owner - Facility: Mountain Island Hydroelectric Station Inspection Date: 03/07/2016 Inspection Type: Compliance Evaluation Flow Measurement - Effluent Yes No NA NE # Is flow meter used for reporting? ❑ 0 ❑ ❑ Is flow meter calibrated annually? ❑ ❑ N ❑ Is the flow meter operational? ❑ ❑ 0 ❑ (If units are separated) Does the chart recorder match the flow meter? ❑ ❑ 0 ❑ Comment: Flow is estimated based on electrical production. Upstream / Downstream Sampling Yes No NA NE Is the facility sampling performed as required by the permit (frequency, sampling type, and ❑ ❑ ❑ sampling location)? Comment: Instream (upstream/downstream) smapling for temperature. Effluent Roe Yes No NA NE Is right of way to the outfall properly maintained? ❑ ❑ N ❑ Are the receiving water free of foam other than trace amounts and other debris? 0 ❑ ❑ ❑ If effluent (diffuser pipes are required) are they operating properly? ❑ ❑ E ❑ Comment: The facility was not generating power at the time of the inspection; therefore, no discharges were observed. No oil sheens were observed downstream of the base of the dam. Operations & Maintenance Yes No NA NE Is the plant generally dean with acceptable housekeeping? 0 ❑ ❑ ❑ Does the facility analyze process control parameters, for ex: MLSS, MCRT, Settleable ❑ ❑ E ❑ Solids, pH, DO, Sludge Judge, and other that are applicable? Comment: Facility appeared to be well maintained at the time of the inspection. Monthly inspections are done for any parts holding Oil and Grease, as well as daily (Monday - Thursday) visual inspection. Page# 5 WaterRescurces ENVIRONMENTAL QUALITY Mr. Nob Zalme Duke Energy Carolinas . 2818 South Main Street Concord, NC 28027 Dear Mr. Zalme: PAT MCCRORY Govermr DONALD R. VAN DER VAART Secretary S. JAY ZIMMERMAN Director March 8, 2016 RECEIVED MAR 15 2016 CENTRAL FILES DWR SECTION Subject: Compliance Evaluation Inspection Mountain Island Hydrologic Station NPDES Permit No. NCG500131 Mecklenburg County, NC Enclosed is a copy of the Compliance Evaluation Inspection for the inspection conducted at the subject facility on March 7, 2016 by Ori Tuvia and Ed Watson. Your cooperation during the site visit was much appreciated. Please advise the staff involved with this NPDES Permit by forwarding a copy of the enclosed repo The report should be self-explanatory; however, should you have any questions concerning this report, please do not hesitate to contact Ori Tuvia at (704) 235-2190, or at ori.tuviana ncdenr.gov. Cc: NPDES MRO Files Sincerely, Ori Tuvia, Environmental Engineer Mooresville Regional Office Division of Water Resources, DEQ Mooresville Regional Office LnceBon: 610 East CelrterAve., Suite 301 Mooresville, NC 28115 Phone: (704) 663-1699 \ Fax (704) 663-6040 \ customerSeMce: 1-877-623-6748 United States Environmental Protection Agency Form Approved. EPA Washington, D.C. 20460 OMB No. 204MO57 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 E 2 18 1 3 I NCG500131 I11 12 16/03/07 17 18 L CJ 19 1 S( 20I I 211 1 1 1 1 1 1 1 1 1 I I I I I I I I I I I I I I I I I 1 1 1 1 1 1 1 1 1.1 1 11 1 1J6 Inspection Work Days Facility Self -Monitoring Evaluation Rating 131 QA Reserved 67 1.0 701d I 71 I� I 72 I � I 731 I 174 75 __Lj_U 80 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 oermit Number) 11:45AM 16/03/07 16/01/19 Mountain Island Hydroelectric Station Exit Time/Date permit Expiration Date 439 Mountain Island Rd 01:30PM 16/03/07 20/07/31 Mount Holly NC 28120 Name(s) of Onsite Representative(s)frdies(s)/Phone and Fax Number(s) Other Facility Data ll! Melanie Gardner//! Nob Zalme//336.462-02211 Name, Address of Responsible Official/idle/Phone and Fax Number Contacted W Marcus Pitts,41 Mountain Farm Ln Tuckasegee NC 28783//864-304-9703/ No Section C: Areas Evaluated During Inspection (Check only those areas evaluated) Permit E Flow Measurement Operations 8 Maintenance Records/Reports Self -Monitoring Program N Facility Site Review 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 Ori A Tuvia MRO WW704-663-1699/ EIF116 Signature of Management 0 A Reviewer Agency/Office/Phone and Fax Numbers Date EPA Form 3580-3 (Rev 9-94) Previous editions are obsolete. Page# NPDES yNmo/day Inspection Type 3I NCG500131 I1 12 16/03/07 17 18 ICI Section D: Summary of Finding/Comments (Attach additional sheets of narrative and checklists as necessary) Page# Permit: NCG500131 Owner - Facility: Mountain Island Hydroelectric Station Inspection Date: 03/07/2016 Inspection Type: Compliance Evaluation 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? ❑ 0 ❑ ❑ Is access to the plant site restricted to the general public? E ❑ ❑ ❑ Is the inspector granted access to all areas for inspection? ® ❑ ❑ ❑ Comment: Permit was renewed on 1/19/2016. The facility has four discharge outfalls that discharge non -contact cooling water at the base of the dam from the four electric generation units/systems. No biocides or corrosion inhibitors are added. The facility staff currently collect one sample (outfall locations/base of the dam) as a representative of all discharges. 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? 0 ❑ ❑ ❑ Are all records maintained for 3 years (lab. reg. required 5 years)? ❑ ❑ ❑ Are analytical results consistent with data reported on DMRs? ❑ ❑ 0 ❑ Is the chain -of -custody complete? ® ❑ ❑ ❑ Dates, times and location of sampling M 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? ❑ ❑ N ❑ Has the facility submitted its annual compliance report to users and DWQ? ❑ ❑ N ❑ (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? ❑ ❑ N ❑ 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? ❑ ❑ N ❑ 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. Effluent_ and instream monitoring data, Calibration logs and COC were reviewed for 2013 - 2015. No effluent limit violations and/or instream temperature exceedances were reported. Page# 3 Permit: NCG500131 Inspection Date: 03/07/2016 Record Keeping Owner - Facility: Mountain Island Hydroelectric Station Inspection Type: Compliance Evaluation Laboratory 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? Yes No NA NE Yes No NA NE ❑ ❑ ❑ N ❑ ❑ ❑ ®❑❑❑ ®❑ ❑ ❑ Comment: Oil and grease samples are analyzed by Duke Analytical Lab (certification #99005). _ PH is sampled on -site PH meter is calibrated prior to sampling. 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)? Yes No NA NE ❑ ❑ ■ ❑ ■ ❑ ❑ ❑ ® ❑ ❑ ❑ ❑ ❑ ❑ ■ ■❑❑❑ ■ ❑ ❑ ❑ Comment: Effluent samples for temperature, pH. oil & grease, and a totalized flow measurement were collected/measured on a quarterly basis. Equalization Basins Is the basin aerated? Is the basin free of bypass lines or structures to the natural environment? Is the basin free of excessive grease? Are all pumps present? Are all pumps operable? Are float controls operable? Are audible and visual alarms operable? # Is basin size/volume adequate? Yes No NA NE Comment: Any oil and grease that has leaked into the system goes through a drainage system into the tank. Incase oil has leaked, the tank will be pumped by Haz-Met. Page# 4 Permit: NCG500131 Owner - Facility: Mountain Island Hydroelectric Station Inspection Date: 03/07/2016 Inspection Type: �_. Compliance Evaluation r Flow Measurement - Effluent Yes No NA NE # Is flow meter used for reporting? ❑ e ❑ ❑ Is flow meter calibrated annually? ❑ ❑ ❑ Is the flow meter operational? ❑ ❑ E ❑ (If units are separated) Does the chart recorder match the flow meter? ❑ ❑ 0 ❑ Comment: Flow is estimated based on electrical production. Upstream I Downstream Sampling Yes No NA NE Is the facility sampling performed as required by the permit (frequency, sampling type, and ❑ ❑ ❑ sampling location)? Comment: Instream (ugstream/downstream) smapling for temperature. Effluent Pipe Yes No NA NE Is right of way to the outfall properly maintained? ❑. ❑ 0 ❑ Are the receiving water free of foam other than trace amounts and other debris? 0 ❑ ❑ ❑ If effluent (diffuser pipes are required) are they operating properly? ❑ ❑ N ❑ Comment: The facilitv was not Qenerating"ower at the time of the inspection: therefore, no discharges were observed. No oil sheens were observed downstream of the base of the dam. Operations & Maintenance Yes No NA NE Is the plant generally dean with acceptable housekeeping? N ❑ ❑ ❑ Does the facility analyze process control parameters, for ex: MLSS, NICRT, Settleable ❑ ❑ N ❑ Solids, pH, DO, Sludge Judge, and other that are applicable? Comment: Facilily agReared to be well maintained at the time of the inspection. Monthly inspections are done for any parts holding Oil and Grease, as well as daily (Monday - Thursday) visual inspection. Page# 5 Water Resources ENVIRONMENTAL OVA4TY January 19, 2016 Mr. Steve Cahoon Duke Energy Carolinas, LLC 410 S Wilmington St Raleigh, NC 27601 PAT MCCRORY DONALD R. VAN DER VAART S. JAY ZIMMERMAN Subject: Renewal of General Permit NCG500000 Mountain Island Hydroelectric Station Certificate of Coverage NCG500131 Mecklenburg County Dear Permittee: The Division has renewed the subject General Permit. We appreciate your patience during the longer -than -expected renewal period. The Division hereby issues the updated version of Certificate of Coverage (CoC) NCG500131 under General Permit NCG500000. It is issued pursuant to the requirements of North Carolina General Statue 143-215.1 and the Memorandum of Agreement between North Carolina and the US Environmental Protection agency dated October 15, 2007 [or as subsequently amended]. If any parts, measurement frequencies or sampling requirements contained in this General Permit are unacceptable to you, you have the right to request an individual permit by submitting an individual permit application. Unless such demand is made, the certificate of coverage shall be final and binding. Please take notice that this Certificate of Coverage is not transferable except after notice to the Division. The Division may require modification or revocation and reissuance of the certificate of coverage. Contact the Mooresville Regional Office prior to any sale or transfer of the permitted facility. Regional Office staff will assist You in documenting the transfer of this CoC This permit does not affect the legal requirements to obtain any other State, Federal, or Local governmental permit that may be required. If you have any questions concerning the requirements of the General Permit, please contact Charles Weaver of the NPDES staff [919 807-6391 or thanes. weaver@ncdenr. gov]. cc: Mooresville Regional Office NPDES file S. Jay Zimmerman, Director Division of Water Resources State of North Carolina I Environmental Quality I Water Resources 1617 Mail Service Center I Raleigh, NC 27699-1617 919 807 6300 919-807-6389 FAX http://portal.ncdenr.org/weblwq STATE OF NORTH CAROLINA DEPARTMENT OF ENVIRONMENTAL QUALITY DIVISION OF WATER RESOURCES GENERAL PERMIT NCG500000 CERTIFICATE OF COVERAGE NCG500131 DISCHARGE OF NON -CONTACT COOLING WATER, COOLING TOWER AND BOILER BLOWDOWN, CONDENSATE, EXEMPT STORMWATER, COOLING WATERS ASSOCIATED WITH HYDROELECTRIC OPERATIONS, AND SIMILAR WASTEWATERS UNDER THE NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM In compliance with the provision 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 Carolinas, LLC is hereby authorized to discharge from a facility located at the Mountain Island Hydroelectric Station 439 Mountain Island Rd Mount Holly Mecklenburg County to receiving waters designated as the Catawba River, a class WS-IV stream in subbasin 03-08-33 of the Catawba River Basin in accordance with the effluent limitations, monitoring requirements, and other conditions set forth in Parts I, II, III and IV hereof. This certificate of coverage takes effect January 19, 2016. This Certificate of Coverage shall remain valid for the duration of the General Permit. Signed this day January 19, 2016 for S y Zimmerman, Director ivision of Water Resources By Authority of the Environmental Management Commission NCDENR North Carolina Department of Environment and Natural Resources Division of Water Resources Pat McCrory Thomas A. Reeder John E. Skvarla, III Governor Director Secretary NOTICE OF RENEWAL INTENT [Required by 15A NCAC 02H .0127(d)]; [term definition see 15A NCAC 02H .0103(19)1 Application for renewal of existing coverage under General Permit NCG500000 Existing Certificate of Coverage (CoQ: NCG500131 (Press Tab to navigate form) 1) Mailing address of facility owner/operator: (address to which all correspondence should be mailed) Company Name Duke Energy Carolinas, LLC Owner Name Steve Cahoon Street Address 410 S. Wilmington St. City Raleigh State NC Telephone # 919 - 546 - 7457 Fax # 919 - 546 - 4409 Email Address steve.cahoon@duke-energy.com 2) Location of facility producing discharge: Facility Name Mountain Island Hydroelectric Station Facility Contact Nob Zalme Street Address 439 Mountain Island Road City Mt. Holly State NC County Gaston Telephone # 336 - 462 - 0221 Fax # Email Address nob.zalme@duke-energy.com 3) Description of Discharge: ZIP Code 27601 - RECEIVEDIDENRIDWR JAN 3 0 2015 Water Quality Permitting Sectior ZIP Code 28120 - a) Is the discharge directly to the receiving stream? ® Yes ❑ No — Please submit a site map with the pathway to the potential receiving waters clearly marked. This includes tracing the pathway of the storm sewer to the discharge point, if the storm sewer is the only viable means of discharge. b) Number of discharge outfalls (ditches, pipes, channels, etc. that convey wastewater from the property): Four Pagel of3 NCG500000 Renewal Application c) What type of wastewater is discharged? Indicate which discharge points, if more than one. ® Non -contact cooling water ❑ Boiler Blowdown ❑ Cooling Tower Blowdown ❑ Condensate ❑ Other (Please describe "Other"): Outfall (s) #: 001, 002, 003, 004 Outfall (s) #: Outfall (s) #: Outfall (s) #: Outfall (s) #: d) Volume of discharge per each discharge point (in GPD): #001: 122,400 GPD #002: 106,560 GPD #003: 136,800 GPD #004:151,200 GPD 4) Please check the type of chemical[s] added to the wastewater for treatment, per each separate discharge point (if applicable, use separate sheet): ❑ Chlorine ❑ Biocides ❑ Corrosion inhibitors ❑ Algaecide ❑ Other ® None If as box other than None is checked, a completed Biocide 101 Form and manufacturers' information on the additive must be submitted to the following address for approval: NC DENR / DWR / Environmental Sciences Section Aquatic Toxicology Unit 1621 Mail Service Center Raleigh, NC 27699-1621 5) Is there any type of treatment being provided to the wastewater before discharge? (i.e., retention ponds, settling ponds, etc.) ❑ Yes - Please include design specifics (i.e., design volume, retention time, surface area, etc.) with submittal package. Existing treatment facilities should be described in detail. ® No 6) Discharge Frequency: a) The discharge is: ® Continuous ❑ Intermittent ❑ Seasonal i) If the discharge is intermittent, describe when the discharge will occur: ii) If seasonal, check the month(s) the discharge occurs: ❑ Jan ❑ Feb ❑ Mar. ❑ Apr ❑ May ❑ Jun ❑ Jul ❑ Aug. ❑ Sept. ❑ Oct. ❑ Nov. ❑ Dec. b) How many days per week is there a discharge? Seven c) Please check the days discharge occurs: ® Sat. ® Sun. ® Mon. ® Tue. ® Wed. ® Thu. ® Fri. Page 2 of 3 .. NCG500000 Renewal Application Additional Application Requirements: The following information must be included in duplicate [original + 1 copy] with this application or it will be returned as incomplete. ➢ Site map. If the discharge is not directly to a stream, the pathway to the receiving stream must be clearly indicated. This includes tracing the pathway of a storm sewer to its discharge point. ➢ Authorization for representatives. If this application will be submitted by a consulting engineer (or engineering firm), include documentation from the Permittee showing that the consultant submitting the application has been designated an Authorized Representative of the applicant, per 15A NCAC 02H .0138(b)(1). CERTIFICATION I certify that I am familiar with the information contained in this application and that to the best of my knowledge and belief such information is true, complete, and accurate. Printed Name of Person Signing: Randy C. Herrin Title: GM III Regional Fleet (Please review 15A NCAC 02H .0106(e)f'or authorized signing officials) Click ere to enter a date. Signature of cant Date Signed North Carolina General Statute § 143-215.613 provides that: Any person who knowingly makes any false statement representation, or certification in any application, record, report, plan, or other document filed or required to be maintained under this Article or a rule implementing this Article; or who knowingly makes a false statement of a material fact in a rulemaking proceeding or contested case under this Article; or who falsifies, tampers with, or knowingly renders inaccurate any recording or monitoring device or method required to be operated or maintained under this Article or rules of the Commission implementing this Article, shall be guilty of a Class 2 misdemeanor which may include a fine not to exceed ten thousand dollars ($10,000). 18 U.S.C. Section 1001 provides a punishment by a fine or imprisonment not more than 5 years, or both, for a similar offense. This Notice of Renewal Intent does NOT require a separate fee. The permitted facility already pays an annual fee for coverage under NCG500000. Mail the original and one copy of the entire package to: NC DENR / DWR / Water Permitting Section 1617 Mail Service Center Raleigh, North Carolina 27699-1617 Attn: Charles Weaver Page 3 of 3 s JEA L44& -P-�Jj-- NCDETIR North Carolina -Department of Environment and !Natural Resources Beverly Eaves Perdue Governor Mr. Allen Stowe, Water Management Duke Energy EC13K / Post Office Box 1006 Charlotte, North Carolina 28201-1006 Dear Mr. Stowe: Division of Water Quality Charles Wakild, P.E. Director June 27,2012 RECEIVED AUG 0 8 2012 CENTPJI- FILES DWO/BOG Subject: Compliance Evaluation Inspection Mt. Island Hydroelectric Station NPDES Permit No. NCG500131 Gaston County Dee Freeman Enclosed is a copy of the Compliance Evaluation Inspection Report for the inspection conducted at the subject facility on June 15, 2012 by Mr. Wes Bell of this Office. Please advise the facility's Operator -in -Responsible Charge (ORC) 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. Sincerely, for Robert Krebs Surface Water Protection Regional Supervisor Enclosure: Inspection Report cc: Gaston County Health Department 0 Mooresville Regional Office Locafion: 610 East Center Ave.. Suite 301 Mooresville, NC 26115 Phone: (704) 663-16991 Fax: (704) 663-60401 Customer Service: 1-877-623-6748 Internal: www.nLwaterqualq.org NofthCarolina Na mmily An Equal Opportunity I Affirmative Action Employer —30% Racycled/10% Post Consumer paper United States Environmental Protection Agency Form Approved. EPA Washington, D.C. 20460 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 I N I 2 31 NCG500131 Ill 121 12/06/15 117 18 LI 19 us20 U !_! 1..=! Remarks 211111 111111111111 11111111 I I I I 11111111 I I I I I I I I II16 Inspection Work Days Facility Self -Monitoring Evaluation Rating B1 QA----------~--------~--Reserved---- ----- 751 I I I I I I 180 72 I--73L74 67 I 1.0 169 7013 71li Section B: FacilityData Name and Location of Facility Inspected (For Industrial Users discharging to POTW, also include Entry Time/Date Permit Effective Date POTW name and NPDES permit Number) 09:15 AM 12/06/15 07/08/01 Mountain Island Hydroelectric Station Exit Time/Date Permit Expiration Date 439 Mountain Island Rd Mount Holly NC 28120 10:35 AM 12/06/15 12/07/31 Name(s) of Onsite Representative(s)/Titles(s)1Phone and Fax Number(s) Other Facility Data /// Robert Steven Jones//704-263-3242 / Winford R Horton//704-382-0801 / Name, Address of Responsible OfflciaiMtle/Phone and Fax Number Contacted Jimmie Allen Stowe,526 S Chruch St Charlotte NC 282011002//704-382-4309/7043829840 No Section C: Areas Evaluated During Inspection Check only those areas evaluated) Permit 0 Flow Measurement Operations & Maintenance Records/Reports Self -Monitoring Program 0 Facility -Site Review 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 Wesley N Bell `;�:��_. �MRO WQ//704-663-1699 Ext.2192/ Signature of Management Q A Rev ewe Agency/Office/Phone and Fax Numbers Data �l IMYra Al occco MRO WQ//704-663-1699 Ext.2204/ EPA Form 3560-3 (Rev 9-94) Previous editions are obsolete. Page # 1 NPDES yr/mo/day Inspection Type (cont.) 1 3 NCG500131 I11 121 12/06/15 117 18U Section D: Summary of Finding/Comments (Attach additional sheets of narrative and checklists as necessary) The facility staff currently collect one sample (outfall locations/base of the dam) as a representative of all discharges. Effluent samples for temperature, pH, oil & grease, and a totalized flow measurement were collected/measured on a quarterly basis. Please be advised that all future sampling events (including flow measurments) must be performed at each discharge outfall. The subject permit requires effluent temperature, pH, and flow and instream (upstream/downstream) temperature measurements for the non -contact cooling water discharges. Note: The instream sampling requirements were consistent with the Permit's requirements. The effluent from the sump drainage system (with oil/water separation tank) should be sampled for flow, pH, and oil & grease as required by the subject permit. Page # 2 Permit: NCG500131 Inspection Date: 06/15/2012 Owner - Facility: Mountain Island 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? Comment: The facility has four discharge outfalls that discharge non -contact cooling water at the base of the dam from the four electric generation units/systems. No biocides or corrosion inhibitors are added. In addition, the facility discharges (near base of dam) from an oil/water separation tank for the sump drainage system. 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? (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? Yes No NA NE Yes No NA NE ■ ■ ■ ■ Page # 3 Permit: NCG500131 Inspection Date: 06/15/2012 Owner - Facility: Mountain Island Hydroelectric station Inspection Type: Compliance Evaluation Record Keeping , ' .. , -.._ _ . - Yes No NA NE , Comment: The records reviewed during the inspection were organized and well maintained. Effluent and instream monitoring data were reviewed for 2011 and 2012. No effluent limit violations and/or instream temperature exceedances were reported. Operations & Maintenance Yes No NA NE Is the plant generally clean with acceptable housekeeping? 0000 Does the facility analyze process control parameters, for ex: MLSS, MCRT, Settleable Solids, pH, DO, Sludge Q Q ■ 0 Judge, and other that are applicable? Comment: Effluent Pipe Yes No NA NE Is right of way to the outfall properly maintained? Q D m n Are the receiving water free of foam other than trace amounts and other debris? E Q 0 11 If effluent (diffuser pipes are required) are they operating properly? ❑ Q ■ 0 Comment: The facility was not generating power at the time of the inspection; therefore, no discharges were observed. No oil sheens were observed downstream of the base of the dam. Page # 4 To NPDES Unit Water Quality Section Attention: Charles Weaver SOC PRIORITY PROJECT: No Date: April 23, 2012 NPDES STAFF REPORT AND RECOMMENDATIONS County: Gaston NPDES Permit No.: NCG500131 PART I- GENERAL INFORMATION REC E I V E C 1. Facility and address: Mountain Island Hydro Station c/o Duke Energy Carolinas, LLC MAY 0 4 201Z 526 South Church Street — EC13K CENTRAL FILES Charlotte, N.C. 28202 DWQ/BOG 2. Date of investigation: March 29, 2012 3. Report prepared by: Michael L. Parker, Environmental Engineer II 4. Person contacted and telephone number: Allen Stowe, (704) 382-9840, Dam - 827-2311. 5. Directions to site: From the jet. of Hwy. 273 and old Hwy. 16 north of the Town of Mount Holly, travel south on Hwy. 273 =2.1 miles and turn left on a gravel access road (no SR number). The Dam is located at the end of this road. 6. Discharge point(s), list for all discharge points*: Latitude: 350 20' 03" Longitude: 80' 59' 12" USGS Quad No.: F 15 SW *Due to the fact that the four outfalls at this facility are in relative close proximity to each other, this is an approximation of the latitude/longitude of all four outfalls. Receiving stream or affected surface waters: Catawba River (Lake Wylie) a. Classification: WS-IV, CA b. River basin and Subbasin no.: Catawba 030833 C. Describe receiving stream features and pertinent downstream uses: The receiving stream is the main channel of the Catawba River. The area is used for primary and secondary recreation and receives bodily contact from various recreational activities. Downstream users include private, municipal, and industrial WWTPs. There are no municipal water intakes located for several miles below this facility. PART H - DESCRIPTION OF DISCHARGE AND TREATMENT WORKS Volume of wastewater (based on maximum flow at each outfall): Outfall001 Outfall002 Outfall003 Outfall004 0.1224 0.10656 0.1368 0.1512 The cooling water is made up of lube oil cooling water and thrust bearing cooling water that is discharged into the tailrace area at the base of the dam. 2. Possible toxic impacts to surface waters: Biocidal additives are not used at this facility; therefore, no toxic impacts are expected. PART III - OTHER PERTINENT INFORMATION 1. Special monitoring or limitations (including toxicity) requests: None at this time. 3. Compliance history: This facility has a good compliance history. PART IV - EVALUATION AND RECOMMENDATIONS The applicant requests reissuance of the Certificate of Coverage for the discharge of non -contact cooling water from a hydro electric dam. The dam has four (4) electrical generators which discharge thrust bearing cooling water and lube oil cooling water through turbine shafts located at the base of the dam (outfalls 001-004). Operation of the dam is intermittent depending on the electrical power needs of Duke Energy's service area. It is recommended that a Certificate of Coverage under the subject GP be reissued as requested. Signature of Report Preparer D to Water Quality Regional Supervisor Date h:\dsr\dsr12\Mt Island Hydro.doc T*�IBA Division of Water Quality / Water Quality Section .tom► NCDENR National Pollutant Discharge Elimination System Fxvft "xr-4T Attu KRum. F4,*o RcFA NCG500000 Certificate of Coverage u NOTICE OF INTENT National Pollutant Discharge Elimination System application for coverage under General Permit NCG500000: Non -contact cooling water, boiler blowdown, cooling tower blowdown, condensate, and similar point source discharges (Please print or type) 1) Mailing address' of owner/operator: Company Name Duke Energy Carolinas, LLC Owner Name Allen Stowe - Water Management Street Address 526 South Church Street, Interoffice - EC13K City Charlotte Telephone No. (704) 382-4309 * Address to which all permit correspondence will be mailed 2) Location of facility producing discharge: State N.C. ZIP Code 28202 Fax: (704) 382-1681 Facility Name Mountain Island Hydroelectric Station Facility Contact Randy Horton Street Address 439 Mountain Island Road City Mt. Holly State NC ZIP Code 28120 County Gaston Telephone No. 704 382-9183 Fax: 704 382-0041 3) Physical location information: Please provide a narrative description of how to get to the facility (use street names, state road numbers, and distance and direction from a roadway intersection). Take 1-85 S to Hwy 273 going toward Mt. Holly. Pass Freightliner truck plant on right. Go 1 3/4 miles, turn right on Mt Island Rd beside water tower. Station is at end of road. (A copy of a county map or USGS quad sheet with facility clearly located on the map is required to be submitted with this application) 4) This NPDES permit application applies to which of the following : ❑ New or Proposed ❑ Modification Please describe the modification: 8 Renewal Please specify existing permit number and original issue date: 5) Does this facility have any other NPDES permits? B No ❑ Yes If yes, list the permit numbers for all current NPDES permits for this facility: 6) What is the nature of the business applying for this permit? Electric Generation Page 1 of 4 04/05 NCG500000 N.O.I. 7) Description of Discharge: a) Is the discharge directly to the receiving water? 8 Yes ❑ No If no, submit a site map with the pathway to the potential receiving waters clearly marked. This includes tracing the pathway of the storm sewer to the discharge point, if the storm sewer is the only viable means of discharge. b) Number of discharge points (ditches, pipes, channels, etc. that convey wastewater from the property): Four c) What type of wastewater is discharged? Indicate which discharge points, if more than one. B Non -contact cooling water Discharge point(s) M 001, 002, 003, 004 ❑ Boiler Blowdown Discharge point(s) M ❑ Cooling Tower Blowdown Discharge point(s) M ❑ Condensate Discharge point(s) #: ❑ Other Discharge point(s) #: (Please describe "Other") d) Volume of discharge per each discharge point (in GPD): #1: 122,400 #2: 106,560 #3: 136,800 #4 151,200 e) Please describe the type of process (i.e., compressor, A/C unit, chiller, boiler, etc.) the wastewater is being discharged from, per each separate discharge point (if applicable, use separate sheet): Hydroelectric generator 8) Please check the type of chemical added to the wastewater for treatment, per each separate discharge point (if applicable, use separate sheet): ❑ Biocides Name: Manuf.: ❑ Corrosion inhibitors Name: Manuf.: ❑ Chlorine Name: Manuf.: ❑ Algaecide Name: Manuf.: ❑ Other Name: Manuf.: B None 9) If any box in item (8) above, other than none, was checked, a completed Biocide 101 Form and manufacturers' information on the additive is required to be submitted with the application for the Division's review. 10) Is there any type of treatment being provided to the wastewater before discharge (i.e., retention ponds, settling ponds, etc.)? ❑ Yes 8 No If yes, please include design specifics (i.e., design volume, retention time, surface area, etc.) with submittal package. Existing treatment facilities should be described in detail. Design criteria and operational data (including calculations) should be provided to ensure that the facility can comply with the requirements of the General Permit. The treatment shall be sufficient to meet the limits set by the general permits. Note: Construction of any wastewater treatment facilities requires submission of three (3) sets of plans and specifications along with the application. Design of treatment facilities must comply with the requirements of 15A NCAC 2H .0138. If construction applies to this discharge, include the three sets of plans and specifications with this application. Page 2 of 4 04/05 NCG500000 N.O.I. 11) Discharge Frequency: a) The discharge is: B Continuous ❑ Intermittent i) If the discharge is intermittent, describe when the discharge will occur: b) c) ❑ Seasonalo ii) If seasonal check the month(s) the discharge occurs: ❑ Jan. ❑ Feb. ❑ Mar. ❑ Apr. ❑ May ❑ Jun. ❑ Jul. ❑ Aug. ❑ Sept. ❑ Oct. ❑ Nov. ❑ Dec. How many days per week is there a discharge? Seven Please check the days discharge occurs: B Sat. B Sun. B Mon. B Tue. B Wed. 12) Pollutants: B Thu. B Fri. Please list any known pollutants that are present in the discharge, per each separate discharge point (if applicable, use separate sheet): 13) Receiving waters: a) What is the name of the body or bodies of water (creek, stream, river, lake, etc.) that the facility wastewater discharges end up in? If the site wastewater discharges to a separate storm sewer system (4S), name the operator of the 4S (e.g. City of Raleigh). Catawba River b) Stream Classification: WS-111 14) Alternatives to Direct Discharge: Address the feasibility of implementing each of the following non -discharge alternatives a) Connection to a Municipal or Regional Sewer Collection System Not Available b) Subsurface disposal (including nitrification field, infiltration gallery, injection wells, etc.) Too much flow c) Spray irrigation Not justifiable, no significant thermal gradient or pollutant load The alternatives to discharge analysis should include boring logs and/or other information indicating that a subsurface system is neither feasible nor practical as well as written confirmation indicating that connection to a POTW is not an option. It should also include a present value of costs analysis as outlined in the Division's "Guidance For the Evaluation of Wastewater Disposal Alternatives". 15) Additional Application Requirements: For new or proposed discharges, the following information must be included in triplicate with this application or it will be returned as incomplete. a) 7.5 minute series USGS topographic map (or a photocopied portion thereof) with discharge location clearly indicated. b) Site map, if the discharge is not directly to a stream, the pathway to the receiving stream must be clearly indicated. This includes tracing the pathway of a storm sewer to its discharge point. c) If this application is being submitted by a consulting engineer (or engineering firm), include documentation from the applicant showing that the engineer (Or firm) submitting the application has been designated an authorized Representative of the applicant. d) Final plans for the treatment system (if applicable). The plans must be signed and sealed by a North Carolina registered Professional Engineer and stamped='Final Design -Not released for construction". Page 3 of 4 04/05 e NCG500000 N.O.I. e) Final specifications for all major treatment components (if applicable). The specifications must be signed and sealed by a North Carolina registered Professional Engineer and shall include a narrative description of the treatment system to be constructed. I certify that I am familiar with the information contained in this application and that to the best of my knowledge and belief such information is true, complete, and accurate. Printed Name of Person Signing: Carol S.Goolsby Title: Vice President, Hydro Fleet (Date Signed) North Carolina General Statute 143-215.6 b (1) provides that: Any person who knowingly makes any false statement, representation, or certification in any application, record, report, plan or other document filed or required to be maintained under Article 21 or regulations of the Environmental Management Commission implementing that Article, or who falsifies, tampers with or knowingly renders inaccurate any recording or monitoring device or method required to be operated or maintained under Article 21 or regulations of the Environmental Management Commission implementing that Article, shall be guilty of a misdemeanor punishable by a fine not to exceed $25,000, or by imprisonment not to exceed six months, or by both. (18 U.S.C. Section 1001 provides a punishment by a fine of not more than $25,000 or imprisonment not more than 5 years, or both, for a similar offense.) Notice of Intent must be accompanied by a check or money order for $100.00 made payable to: NCDENR Mail three (3) copies of the entire package to: NPDES Permits Unit Division of Water Quality 1617 Mail Service Center Raleigh, North Carolina 27699-1617 Final Checklist This application will be returned as incomplete unless all of the following items have been included: B Check for $100 made payable to NCDENR B 3 copies of county map or USGS quad sheet with location of facility clearly marked on map B 3 copies of this completed application and all supporting documents ❑ 3 sets of plans and specifications signed and sealed by a North Carolina P.E. B Thorough responses to items 1-7 on this application 8 Alternatives analysis including present value of costs for all alternatives Note The submission of this document does not guarantee the issuance of an NPDES permit Page 4 of 4 04/05 rove! map pmtea on 09/10/07 tram -norM caronna.tpo' ana 'unmto.tpg' 81'00'00" w 80-59'00H W 80"58'00' W WG584 80°57'00' W f ` I nT n 2 J/ �,y1�3Wvaaa:41-i v f t 2 O t Mountain Island Hydro Station NPDES No.: NCG500131 y{z � Outfall001 r Sampling Waypoint: s }4 r N: 350 20' 03" VA I VIE, X0 1 . . L' 1 I T 81-00'00' w 90-59 on" W af1-SB'aW W WG994 90o57'00" W pr��roo lul o � loon nrtms sae �I�a..;,a:oro.c cv:; �nielWoeegeFh. t�m�a��:�lw�: Q NCDENR North Carolina Department of Environment and Natural Resources Division of Water Quality Michael F. Easley, Governor William G. Ross, Jr., Secretary Coleen H. Sullins, Director July 23, 2007 Jimmie Allen Stowe, Jr. Duke Energy Corporation 526 South Church Street / EC 13K Charlotte, NC 28202 Subject: Renewal of coverage / General Permit NCG500000 Mountain Island Hydroelectric Station Certificate of Coverage NCG500131 Mecklenburg County Dear Permittee: In accordance with your renewal application [received on January 31, 20071, the Division is renewing Certificate of Coverage (CoC) NCG500131 to discharge under NCG500000. This CoC is issued pursuant to the requirements of North Carolina General Statue 143-215.1 and the Memorandum of Agreement between North Carolina and the US Environmental Protection agency dated May 9, 1994 [or as subsequently amended]. If any parts, measurement frequencies or sampling requirements contained in this General Permit are unacceptable to you, you have the right to request an individual permit by submitting an individual permit application. Unless such demand is made, the certificate of coverage shall be final and binding. Please take notice that this Certificate of Coverage is not transferable except after notice to the Division. The Division may require modification or revocation and reissuance of the certificate of coverage. Contact the Mooresville Regional Office prior to any sale or transfer of the permitted facility Regional Office staff will assist you in documenting the transfer of this CoC. This permit does not affect the legal requirements to obtain other permits which may be required by the Division of Water Quality or permits required by the Division of Land Resources, Coastal Area Management Act or any other Federal or Local governmental permit that may be required. If you have any questions concerning the requirements of the General Permit, please contact Jim McKay [919 733-5083, extension 595 or james.mckav@ncmail netl. Sincerely, Zoe, -76 4 �. for Coleen H. Sullins cc: Central Files Mooresville Regional Office / Surface Water Protection NPDES file 1617 Mail Service Center, Raleigh, North Carolina 27699-1617 One 512 North Salisbury Street, Raleigh, North Carolina 27604 NorthCarolina Phone: 919 733-5083 / FAX 919 733.0719 / Internet: www.ncwaterquality.org Naturally An Equal Opportunity/Affirmative Action Employer— 50% Recycled/10% Post Consumer Paper STATE OF NORTH CAROLINA DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES DIVISION OF WATER QUALITY GENERAL PERMIT NCG500000 CERTIFICATE OF COVERAGE NCG500131 TO DISCHARGE NON -CONTACT COOLING WATER, COOLING TOWER AND BOILER BLOWDOWN, CONDENSATE AND SIMILAR WASTEWATERS UNDER THE NATIONAL POLLUTANT DISCHARGE ELE%HNATION SYSTEM In compliance with the provision 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 Corporation is hereby authorized to discharge from a facility located at Mountain Island Hydroelectric Station 439 Mountain Island Road Mount Holly Mecklenburg County to receiving waters designated as the Catawba River in subbasin 30833 of the Catawba River Basin in accordance with the effluent limitations, monitoring requirements, and other conditions set forth in Parts I, II, III and IV hereof. This certificate of coverage shall become effective August 1, 2007. This Certificate of Coverage shall remain in effect for the duration of the General Permit. Signed this day July 23, 2007. for Coleen H. Sullins, Director Division of Water Quality By Authority of the Environmental Management Commission To: NPDES and SW General Permits Unit Water Quality Section Attention: Charles Weaver SOC PRIORITY P Q. T: No EAP RAPR 1 2 2u07 NR i Date: April 11, 29 r UJc``a CH NPDES STAFF REPORT AND RECOMMENDATIONS County: Gaston NPDES Permit No.: NCG500131 MRO No.: 07-05 PART I - GENERAL INFORMATION 1. Facility and address: Mountain Island Hydro Station c/o Duke Energy Carolinas, LLC 526 South Church Street Charlotte, N.C. 28202 2. Date of investigation: March 26, 2007 3. Report prepared by: Michael L. Parker, Environmental Engineer II 4. Person contacted and telephone number: Allen Stowe, (704) 3 82-9840, Dam - 827-2311. 5. Directions to site: From the jct. of Hwy. 273 and old Hwy. 16 north of the Town of Mount Holly, travel south on Hwy. 273 z2.1 miles and turn left on a gravel access road (no SR number). The Dam is located at the end of this road. 6. Discharge point(s), list for all discharge points*: Latitude: 350 20' 03" Longitude: 800 59' 12" *Due to the fact that the four outfalls at this facility are in relative close proximity to each other, this is an approximation of the latitude/longitude of all four outfalls. Attach a USGS Map Extract and indicate treatment plant site and discharge point on map. USGS Quad No.: F 15 SW 7. Site size and expansion area consistent with application: There is basically no area available for the construction of WWT facilities, if necessary. Page Two 8. a 10. Topography (relationship to flood plain included): Hilly, 5-20% slopes. Location of nearest dwelling: Approx. 1000+ feet from the site. Receiving stream or affected surface waters: Catawba River (Lake Wylie) a. Classification: WS-IV, CA b. River basin and subbasin no.: Catawba 030833 C. Describe receiving stream features and pertinent downstream uses: The receiving stream is the main channel of the Catawba River. The area is used for primary and secondary recreation and receives bodily contact from various recreational activities. Downstream users include private, municipal, and industrial WWTPs. There are no municipal water intakes located for several miles below this facility. PART II - DESCRIPTION OF DISCHARGE AND TREATMENT WORKS 2. 3. 4. a. Volume of wastewater (based on maximum flow at each outfall): Outfall001 Outfall002 Outfall003 Outfall004 0.1224 0.10656 0.1368 0.1512 b. What is the current permitted capacity: There is no capacity in the current permit. C. Actual treatment capacity of current facility (current design capacity): N/A d. Date(s) and construction activities allowed by previous ATCs issued in the previous two years: There have been no ATCs issued to this facility in the past two years. e. Description of existing or substantially constructed WWT facilities: There are no existing WWT facilities nor are any proposed at this time. f. Possible toxic impacts to surface waters: Biocidal additives are not used at this facility, therefore, no toxic impacts are expected. Residual handling and utilization/disposal scheme: No residuals are generated at this facility. Treatment plant classification: This facility does not met the minimum criteria for a class I rating. SIC code(s): 4911 Wastewater code(s): 14 MTU code(s): 00000 PART III - OTHER PERTINENT INFORMATION 1. Is this facility being constructed with Construction Grant Funds or are any public monies involved (municipals only)? Public monies were not used in the construction of this facility. Page Three 2. Special monitoring or limitations (including toxicity) requests: None at this time. 3. Important SOC/JOC or Compliance Schedule dates: This facility is neither under an SOC nor is one being proposed at this time 4. Alternative analysis evaluation: There are no known alternatives other than to discharge. PART IV - EVALUATION AND RECOMMENDATIONS The applicant requests reissuance of the Certificate of Coverage for the discharge of non - contact cooling water from a hydro electric dam. The dam has -four (4) electrical generators which discharge thrust bearing cooling water through turbine shafts located at the base of the dam (outfalls 001-004). Operation of the dam is intermittent depending on the electrical power needs of Duke Energy's service area. It is recommended that a Certificate of Coverage under the subject GP be reissued as requested. Signature of Report Preparer Date Water Quality Regional Supervisor Date hAdsrldsr071mtis1dam.dsr AF4�ja OV% 0-ftwo , NCDENR North Carolina Department of Environment and Natural Resources Division of Water Quality Michael F. Easley, Governor William G. Ross, Jr., Secretary Alan W. Klimek, P.E., Director NOTICE OF RENEWAL INTENT Application for renewal of existing coverage under General Permit NCG500000 Existing Certificate of Coverage (CoC): NCG500131 (Please print or type) 1) Mailing address' of facility owner/operator: Company Name Duke Energy Carolinas, LLC Owner Name Allen Stowe, Scientist — Water Management Street Address 526 South Church Street, EC 13K City Charlotte StateNC ZIP Code 28202 Telephone Number(704) 382-4309 Fax: L704) 382-9840 Email address jastowe(@,duke-energy.com * Address to which all permit correspondence should be mailed 2) Location of facility producing discharge: Facility Name Mountain Island Hydroelectric Station Facility Contact Randy Horton Street Address 439 Mountain Island Road City Mt. Holly StateNC ZIP Code 28120 County Gaston Telephone Number(704) 827-2311 Fax: (704) 382-0041 Email address wrhorton@,duke-energy.com 3) Description of Discharge: a) Is the discharge directly to the receiving stream? ® Yes 0 No (If no, submit a site map with the pathway to the potential receiving waters clearly marked. This includes tracing the pathway of the storm sewer to the discharge point, if the storm sewer is the only viable means of discharge.) b) Number of discharge outfalls (ditches, pipes, channels, etc. that convey wastewater from the property) : Four c) What type of wastewater is discharged? Indicate which discharge points, if more than one. ® Non -contact cooling water Outfall(s) #: 001,002,003,004 0 Boiler Slowdown Outfall (s) #: Page 1 of 3 NCG500000 renewal application ❑ Cooling Tower Blowdown Outfall (s) #: ❑ Condensate Outfall (s) #: ❑ Other Outfall (s) #: (Please describe "Other") d) Volume of discharge per each discharge point (in GPD): #001: 122,400 #002: 106,560 #003: 136,800 #004151,200 4) Please check the type of chemical [s] added to the wastewater for treatment, per each separate discharge point (if applicable, use separate sheet): ❑ Chlorine ❑ Biocides ❑ Corrosion inhibitors O Algaecide ❑ Other ® None 5) If any box in item (4) above [other than None] was checked, a completed Biocide 101 Form and manufacturers' information on the additive must be submitted to the following address for approval: NC DENR / DWQ / Environmental Sciences Section Aquatic Toxicology Unit 1621 Mail Service Center Raleigh, NC 27699-1621 6) Is there any type of treatment being provided to the wastewater before discharge (i.e., retention ponds, settling ponds, etc.)? ❑ Yes ® No (If yes, please include design specifics (i.e., design volume, retention time, surface area, etc.) with submittal package. Existing treatment facilities should be described in detail. ) 7) Discharge Frequency: a) The discharge is: ® Continuous OIntermittent ❑ Seasonal* i) If the discharge is intermittent, describe when the discharge will occur: ii) *Check the month(s) the discharge occurs: ❑ Jan ❑ Feb O Mar. ❑ Apr O May ❑ Jun O Jul ❑ Aug. O Sept. ❑ Oct. O Nov. ❑ Dec. b) How many days per week is there a discharge? Seven c) Please check the days discharge occurs: ® Sat. ® Sun. ® Mon. ® Tue. ® Wed. ® Thu. ® Fri. 8) Receiving stream[s]: a) To what body or bodies of water (creek, stream, river, lake, etc.) does the facility discharge wastewater? If the site discharges wastewater to a separate storm sewer system (4S), name the operator of the 4S (e.g. City of Raleigh). Catawba River b) Stream Classification: WS-III Additional Application Requirements: Page 2 of 3 NCG500000 renewal application Additional Application Requirements: The following information must be included in triplicate [original + 2 copies] with this application or it will be returned as incomplete. ➢ Site map. If the discharge is not directly to a stream, the pathway to the receiving stream must be clearly indicated. This includes tracing the pathway of a storm sewer to its discharge point. ➢ Authorization for representatives. If this application will be submitted by a consulting engineer (or engineering firm), include documentation from the Permittee showing that the consultant submitting the application has been designated an Authorized Representative of the applicant. Certification I certify that I am familiar with the information contained in this application and that to the best of my knowledge and belief such information is true, complete, and accurate. Printed Name of Person Signing: Carol S. Goolsby Title: General Manager, Hydro Fleet 57 (Signature of North Carolina General Statute 143-215.6 b (i) provides that: 1129107 (Date Signed) Any person who knowingly makes any false statement, representation, or certification in any application, record, report, plan or other document filed or required to be maintained under Article 21 or regulations of the Environmental Management Commission implementing that Article, or who falsifies, tampers with or knowingly renders inaccurate any recording or monitoring device or method required to be operated or maintained under Article 21 or regulations of the Environmental Management Commission implementing that Article, shall be guilty of a misdemeanor punishable by a fine not to exceed $25,000, or by imprisonment not to exceed six months, or by both. (18 U.S.C. Section 1001 provides a punishment by a fine of not more than $25,000 or imprisonment not more than 5 years, or both, for a similar offense.) asasasasasasasasasasasa This Notice of Renewal Intent does NOT require a separate fee. The permitted facility already pars an annual fee for coverage under NCG500000. asasasasasasasasasasasa Mail the original and two copies of the entire package to: Mr. Charles H. Weaver NC DENR / DWQ / NPDES 1617 Mail Service Center Raleigh, North Carolina 27699-1617 Page 3 of 3 5k �. 0, %1. ZA ca _ � t h •- f, - If �• : �•••�-• • ' ^ � f , �' it 39130wm.N. ,,,o •�� a Powerplant D• . • 1.. '�- •, nbola., % ' , :Wat r Ti _ �.F \\\ `•�%!/ , l • N p by til�..� / , d U ag �• -• .,. '� - , ._ _ .Y n_;-sss� tt,.•s�-' u ♦ , sub raa • . _ iJ : p , • :� :�'; t.: ... is I ; •; ' v , r may, L� .��. t � �\ i. � ' ...III I . • _-•--- ��.�X. •� a _• ,,, � % cam (/ \, �•- q"�' 3912 Jb \`�v.J/l y �i t�/ -,� •• n. �� .� ill 4i Rozzeffe i, •' - f • �• :�� - .�� • / Bridge �rl! l i ISM 729 Jin Zip f ~= -� (Ij ,U N i .I! `� !� - „�� i ' y''' r": • y I 3911 •' `f t • ///=�t•rr Sri' / -er .{ :O - • t,••�I •�`•- �•• ��.. • , • // :�+ r• / • { • � � '. `' � \! ! f.Ilk— Mountain '� • ^ /fir. . �� • • • ,ti/ _ ! I.? �;'r--�; ; i; - }•• = ,, a'.•' +'► q • i •: 1 h — �/ I - t 1` a �.• �"'� 11 I 1. �•• :•Jr-� _ ,'t it •••' � �" yam{ �� : d •.• -- '.• , .- . •,• _r , ro. t Mt. Island Hydro Stationmou an rP18nub •ta * '� /mac , .. •� . 20' lJslan �'' + l Y ♦• ' t r• C f l • � tit � f'� �/'�•, 1 � '.1 � ':- •O � ' .._ ♦ `. ` ,/`) O / • 1'1 _• • 730Or 21 to .�i .L. :. phi Y i - �:/,1�/j , . 1 _ •. 1 ,. , .. , .. • iACti 1 •• _ �'• •�� • r' �/i ,. . ••r••..:M1 t�.�. -j 1 t :S'i• -/' �,•♦ �'� • • P••. 31 t '^ � ,�'•' -• � ♦- � �. w '� N: w� • MM V ♦ 1 �.i1 f r-% ' ! !,i•r i • � µ•` ubst 4c ' L. - - - /► /' � . i` - �+ �� r�•.'•. �.�' = =ice_. — r - •`� • _ _. SECTION OF USGS TOPOGRAPHIC MAP OF THE AREA AROUND MT. ISLAND HYDRO STATION SCALE 1:24000 l MLE fh o I t•16E *W o aoo 2000 3000 4000 5000 6000 7000 FEET .o o : KLOMCTER CONTOUR INTERVAL 20 FEET 24 R' 7a0• ELEVATION (LOOKING UPSTREAM) LEGEND 001 - Unit 1 Lube Oil Cooler Cooling Water Discharge To Tailwater Through Turbine Shaft Water Cooled Wood Guide Bearing Reservoir Tub. 002 - Unit 2 Lube Oil Cooler Cooling Water Discharge To Tailwater Through Turbine Shaft Water Cooled Wood Guide Bearing Reservoir Tub. 003 - Unit 3 Lube Oil Cooler Cooling Water Discharge To Tailwater Through Turbine Shaft Water Cooled Wood Guide Bearing Reservoir Tub. 004 - Unit 4 Lube Oil Cooler Cooling Water Discharge To Tailwater Through Turbine Shaft Water Cooled Wood Guide Bearing Reservoir Tub. DUKE POWER COMPANY MOUNTAIN ISLAND HYDRO STATIDN NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM (NPOES) POINT SOURCE DISCHARGES "IO. 1ilt�t[D sDA Nett AMRTCAtIDN E h i �""` jwp. D►Tf dEt[fD atE .vv. p�tf N0. REVISIONS OR>7MDATECWODATE APPA DATE etVli acc Kw REV. INSPECTED MO. NO. MI-NPOES-2 8 Tailwater Through Turbine Shaft Water Cooled Wood Guide Bearing Reservoir Tub. 002 - Unit 2 Lube Oil Cooler Cooling Water Discharge To Tailwater Through Turbine Shaft Water Cooled Wood Guide Bearing Reservoir Tub. 003 - Unit 3 Lube Oil Cooler Cooling Water Discharge To Tailwater Through Turbine Shaft Water Cooled Wood Guide Bearing Reservoir Tub. 004 - Unit 4 Lube Oil Cooler Cooling Water Discharge To Tailwater Through Turbine Shaft Water Cooled Wood Guide Bearing Reservoir Tub. r a T a PLAN SCALEI 1" =100' 2lf0. fl UAM BOA NOES ORItATIOI NO. I REVISIONS I MOUNTAINK ISLA DR HYOROA STATION NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM (NPOES) POINT SOURCE DISCHARGES DWO. NO. MI-NPDES-1 REV. I��c�o e State of North Carolina Department of Environment and Natural Resources Division of Water Quality Michael F. Easley, Governor William G. Ross Jr., Secretary Alan W. Klimek, P.E. Director July 26, 2002 ANGELIA GROOMS MOUNTAIN ISLAND HYDROELECTRIC PLANT 13339 HAGERS FERRY RD MAIL CODE EC11E HUNTERSVILLE, NC 28078 Dear Permittee: 1•• NC ENR NORTH CAROLINA DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES Subject: Reissue - NPDES Wastewater Discharge Permit Mountain Island Hydroelectric Plant COC Number NCG500131 Mecklenburg County In response to your renewal application for continued coverage under general permit NCG500000, the Division of Water Quality (DWQ) is forwarding herewith the reissued wastewater general permit Certificate of Coverage (COC). This COC is reissued pursuant to the requirements of North Carolina General Statute 143-215.1 and the Memorandum of .Agreement between the state of North Carolina and the U.S. Environmental Protection Agency, dated May 9, 1994 (or as subsquently amended). The following information is included with your permit package: * A copy of the Certificate of Coverage for your treatment facility * A copy of General Wastewater Discharge Permit NCG500000 * A copy of a Technical Bulletin for General Wastewater Discharge Permit NCG500000 Your coverage under this general permit is not transferable except after notice to DWQ. The Division may require modification or revocation and reissuance of the Certificate of Coverage. This permit does not affect the legal requirements to obtain other permits which may be required by DENR or relieve the permittee from responsibility for compliance with any other applicable federal, state, or local law rule, standard, ordinance, order, judgment, or decree. If you have any questions regarding this permit package please contact Aisha Lau of the Central Office Stormwater and General Permits Unit at (919) 733-5083, ext. 578 Sincerely, for Alan W. Klimek, P.E. cc: Central Files Stormwater & General Permits Unit Files Mooresville Regional Office 1617 Mail Service Center, Raleigh, North Carolina 27699-1617 Telephone 919-733-5083 FAX 919-733-0719 An Equal Opportunity Affirmative Action Employer 50% recycled/ 10% post -consumer paper STATE OF NORTH CAROLINA DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES DIVISION OF WATER QUALITY GENERAL PERMIT NO. NCG500000 CERTIFICATE OF COVERAGE No. NCG500131 TO DISCHARGE NON -CONTACT COOLING WATER, COOLING TOWER AND BOILER BLOWDOWN, CONDENSATE AND SIMILAR WASTEWATERS UNDER THE NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM In compliance with the provision 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 CORPORATION is hereby authorized to discharge NON -CONTACT COOLING WATER / CONDENSATE water or similar wastewater from a facility located at MOUNTAIN ISLAND HYDROELECTRIC PLANT ROUTE 1, BOX 74 MOUNT HOLLY MECKLENBURG COUNTY to receiving waters designated as the Catawba River, a class WS-IV water, in the Catawba River Basin in accordance with the effluent limitations, monitoring requirements, and other conditions set forth in Parts I, II, III, and IV of General Permit No. NCG500000 as attached. This certificate of coverage shall become effective August 1, 2002. This Certificate of Coverage shall remain in effect for the duration of the General Permit. Signed this day July 26, 2002. for Alan W. Klimek, P.E., Director Division of Water Quality By Authority of the Environmental Management Commission State of North Carolina Department of Environment, Health and Natural Resources Division of Water Quality James B. Hunt, Jr., Governor Jonathan Howes, Secretary A. Preston Howard, Jr., P.E., Director David F. Mitchell Duke Power Company 13339 Hagers Ferry Road Huntersville , NC 28078 ALTNAA IT.A 111116 IDFEE HNR July 24, 1997 Subject: Certificate of Coverage No. NCG500131 Renewal of General Permit Mountain Island Hydro Plant Mecklenburg County Note: Effluent limitations for this hydroelectric facility are found on pages A.2. and A.3. Dear Permittee: In accordance with your application for renewal of the subject Certificate of Coverage, the Division is forwarding the enclosed General Permit. This renewal is valid until July 31, 2002. This permit is issued pursuant to the requirements of North Carolina General Statute 143-215.1 and the Memorandum of Agreement between North Carolina and the U.S. Environmental Protection Agency dated December 6,1983. If any parts, measurement frequencies or sampling requirements contained in this permit are unacceptable to you, you have the right to request an individual permit by submitting an individual permit application. Unless such demand is made, this certificate of coverage shall be final and binding. The Certificate of Coverage for your facility is not transferable except after notice to the Division. Use the enclosed Permit Name/Ownership Change form to notify the Division if you. sell or otherwise transfer ownership of the subject facility. The Division may require modification or revocation and reissuance of the Certificate of Coverage. This permit does not affect the legal requirements to obtain other permits which may be required by the Division of Water Quality, the Division of Land Resources, Coastal Area Management Act or any other Federal or Local governmental permit that may be required. If you have any questions concerning this permit, please contact the NPDES Group at the address below. Sincerely, A. Preston Howard, Jr., P.E. cc: Central Files 6 Mooresville Regional Office NPDES File Facility Assessment Unit P.O. Box 29535, Raleigh, North Carolina 27626-0535 (919) 733-5083 FAX (919) 733-0719 p&e@dem.ehnr.state.nc.us An Equal Opportunity Affirmative Action Employer 50% recycled / 10% post -consumer paper STATE OF NORTH CAROLINA DEPARTMENT OF ENVIRONMENT, HEALTH, AND NATURAL RESOURCES DIVISION OF WATER QUALITY GENERAL PERMIT NO. NCG500000 CERTIFICATE OF COVERAGE NO. NCG500131 TO DISCHARGE NON -CONTACT COOLING WATER, COOLING TOWER AND BOILER BLOWDOWN, CONDENSATE, EXEMPT STORMWATER, COOLING WATERS ASSOCIATED WITH HYDROELECTRIC OPERATIONS, AND SIMILIAR WASTEWATERS UNDER THE NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM In compliance with the provision 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 Power Company is hereby authorized to discharge cooling water and other waters associated with hydroelectric operations from a facility located at Mountain Island Hydro Plant Route 1, Box 74 Mount Holly Mecklenburg County to receiving waters designated as subbasin 30833 in the Catawba River Basin in accordance with the effluent limitations, monitoring requirements, and other conditions set forth in Parts I, II, III and IV of General Permit No. NCG500000 as attached. This certificate of coverage shall become effective August 1,1997. This certificate of coverage shall remain in effect for the duration of the General Permit. Signed this day July 24,1997. A. Preston Howard, Jr., P.E., Director Division of Water Quality By Authority of the Environmental Management Commission t .4 State of North Carolina . Department of Environment, Health and Natural Resources Division of Water Quality 512 North Salisbury Street•Raleigh, North Carolina 27626 James B. Hunt, Jr., Governor A. Preston Howard, Jr., P.E. Jonathan B. Howes, Secretary Director NOTICE OF INTENT National Pollutant Discharge Elimination S tem Application for Coverage under General Permit NCG500000; Non -contact cooling water, boiler blowdown, cooling tower blowdown, condensate, and similar point source discharges. 1. Name, Address, location, and telephone number of facility requesting Permit. A. Official Name: Duke Power. Company -Mountain Island Hydro Station B. Mailing Address: c/o John Carter (1) Street Address; 13339 Hagers Ferry Road (2) City; Huntersville (3) State; North Carolina (4) Zip; 28078 - 7929 (5) County, Mecklenburg C. Location. (Attach map delineating general facility location) (1) Street Address; Route 1 Box 74, Mt. Island Road (2) City; Mount Holly (3) State; North Carolina 28120 (4) County; Gaston D. Telephone Number, (7 0 4) 8 2 7 - 2 311 2. Facility Contact: A. Name; B. Title; C. Company Name; Duke Power Company D. Phone Number; (7 0 4) 8 7 5- 4 3 3 4 3. Application type (check appropriate selection): A. New or Proposed; B. Existing; x If previously permitted, provide permit number NCG5 0 0 0131 and issue date March 31, 1994 C. Modification; (Describe the nature of the modification): 4. Description of discharge A. Please state the number of separate discharge points. 1.❑. 2,0; 3,❑; 4,®; ,❑. B. Please describe the amount of wastewater being discharged per each separate discharge ppoint: 1:4 3, 2 0 0 gallons per day (gpd) 2:4 3, 2 0 0 (gpd) 3:4 3, 200 (gpd) 4: 4 3, 2 0 0 (gpd) Page 1 R TF W nnn)"Ic , C. Check the duration and frequency of the discharge, per each separate discharge point: 1. Continuous: 2. Intermittent (please describe): Only when unit operates 3. Seasonal (check month(s) the discharge occurs): January ® ; February ® ; March ® ; April ® ; May ® ; June ® ; July e ; August ® ; September ® ; October® ; Novemberg] ; December ® . Di scharge can occur any month 4. How many days per week is there a discharge? (check the days the discharge occurs) Discharge can occur any d a y Monday ® , Tuesday ® , Wednesday ® , Thursday g) , Friday ® , Saturday ® , Sunday ® . 5. How much of the volume discharged is treated? (state in percent) 0 % D. What type of wastewater is discharged, per separate discharge point? (place check next to correct type): 1. Non -contact cooling water; X 2. Boiler blowdown; 3. Cooling tower blowdown; 4. Condensate; 5. Other (please describe); See Attachment 9 Please list any known pollutants that are present in the discharge, per each separate discharge point (if applicable); E. Please describe the type of process the cooling water is being discharged from, per separate discharge point (i.e. compressor, boiler blowdown, cooling tower blowdown, air conditioning unit, etc.):Once through cool incf water (See Attachment 9) F. Please check the type of chemical added to the wastewater for treatment or other, per separate discharge point: 1. Biocides; 2. Corrosion inhibitors; 3. Chlorine; 4. Algae control; 5. Other (please describe); 6. None; x If 1, 2, 3, 4, or 5 was checked, please state the name and manufacturer of the chemical additive. Also include a completed Biocide 101 form, and manufacturers' information on the additive with the application for the Division's review. G. Is there any type of treatment being provided to the wastewater before discharge? (i.e. retention ponds, settling ponds, etc.); if yes, please describe. Give design specifics (i.e. design volume, retention time, surface area, etc.). Existing treatment facilities should be described in detail and design criteria or operational data should be provided (including calculations) to ensure that the facility can comply with requirements of the General Permit. None NOTE: Construction of any wastewater treatment facilities require submission of three (3) sets of plans and specifications along with their application. Design of treatment facilities must comply with requirement 15A NCAC 2H .0138. If construction applies to the discharge, include the three sets of plans and specifications with the application. 5. What is the nature of the business applying for this permit? Pub lic Utility, Electricity Generation M Name of receiving water: Catawba River Classification:WS - III (Attach a USGS topographical map with all discharge point(s) clearly marked) Page 2 srF NCDO027F 2 7. Is the discharge directly to the receiving water? (Y. N) Y f If no, state specifically the discharge point. Mark clearly the pathway to the potential receiving waters on the site map. (This includes tracing the pathway of the storm sewer to its discharge point, if a storm sewer is the only viable means of discharge.) 8. Please address possible non -discharge alternatives for the following options: A. Connection to a Regional Sewer Collection System; Not available B. Subsurface Disposal; Too much fl ow C. Spray Irrigation; Not justifiable, no significant thermal gradient -or pollutant load 9. 1 certify that I am familiar with the information contained in the application and that to the best of my knowledge and belief such information is true, complete, and accurate. Printed Name of Person Signing T.C. McMeekin Title Senior V.P. Power Generation Date Application Signed Signature of Applicant NORTH CAROLINA GENERAL STATUTE 143.215.6E (1) PROVIDES THAT: Any person who knowingly makes any false statement, representation, or certification in any application, record, report, plan or other document filed or required to be maintained under Article 21 or regulations of the Environmental Management Commission implementing that Article, or who falsifies, tampers with or knowingly renders inaccurate any recording or monitoring device or method required to be operated or maintained under Article 21 or regulations of the Environmental Management Commission implementing that Article, shall be guilty of a misdemeanor punishable by a fine not to exceed $10,000, or by imprisonment not to exceed six months, or by both. (18 U.S.C. Section 1001 provides a punishment by a fine of not more than $10,000 or imprisonment not more than 5 years, or both, for a similar offense.) Notice of Intent must be accompanied by a check or money order for $400.00 made payable to the North Carolina Department of Environment, Health, and Natural Resources. Mail three (3) copies of entire package to: Division of Environmental Management NPDES Permits Group Post Office Box 29535 Raleigh, North Carolina 27626-0535 Page 3 STF NCDO027F 3 1 -743 A` 4 " W ' svvv\d,a: - • «. s ro 39130oom.N• ;,o co, Powerplant �' •.• - ~' - 1 ubst.2, % ' ,.Wat r Th • , a s� ' -_ - q Du Powe aryry 0. • - '/ ' ♦-• _ .�•� L•t i_��._i_ �.:i3 �:• /:• --- •♦` •,�/•O W4D ra +•f ^aq j - Ir .. _ // ��, •�,, t" 1• �: "ems •p,a /x\a att r " t 1 Ur it ,g', • ,'' ; •^�R116 iveryend t;4 = 0 '• ; • •1 ' / _ �1' _-'_ � _ � � . : • , O , � � � ,,pper \':. JI Rmefle �_:.. _ ` • :�♦ Bridge ♦ ..,� �; IS �� Ij 413 • '- ' ,, r 1 • / L i. O \• !.' 'may • `; ��'' :• • . i9 .`� _ Mountain / 17� • `�w 1• �' ,:i �a i 17 1 ► �1: . as • ly • ' `• �t Island !% , • �\ �yx.•,,� . lLa r • + •' is �i / -r ��• 1 /\�' J' _ 1�:i - ..' 'iie i _ �%^ 4 Mt. Island Hydro Station 1 ♦ - 1soso ti a MOu n owerplan _ n ub to \ i•� /`-1 �. ^ •' 1: :•. •. �', : ` V 7- op IZ ineiv ! 1 •\''••\ • , / `;. •\ � { -.�: � lair �- `�� ;• `.. :t-•, ��•^ �•O 1 :• Wr ...:. :t •-•�� •'/ 1`a'�. f3�i �O/ w�/ •/• +�.:•: ,rf• R 1 •ice' •1 .•./JJY� •' .,�. so • `• •"* � •\1: �� i•' ��.` ! / — ♦�,/ ! I ./I -.rr .'!` ••• � fi�`=e�;J•�,it / h t'M -/� f� •.fir%. ••♦ �i • � • •• I/+ =• 1•. ow lj _Love. . ��• - :�,';f - t;� ' �y.� i apell _ .•_ -Ha rlrand: � • / bskf:• SECTION OF USGS TOPOGRAPHIC MAP OF THE AREA AROUND MT. ISLAND HYDRO STATION SCALE 1:24000 I WE 1000 0 xm 2000 3000 4000 5000 6000 7000 FEET T .0 0 1 KLOuE TER CONTOUR INTERVAL 20 FEET i anwater Through Turbine Shaft Water Cooled Wood Guide Bearing Reservoir Tub. 002 - Unit 2 Lube Oil Cooler Cooling Water Discharge To Tailwater Through Turbine Shaft Water Cooled Wood Guide Bearing Reservoir Tub. 003 - Unit 3 Lube Oil Cooler Cooling Water Discharge To Tailwater Through Turbine Shaft Water Cooled Wood Guide Bearing Reservoir Tub. 004 - Unit 4 Lube Oil Cooler Cooling Water Discharge To Tailwater Through Turbine Shaft Water Cooled Wood Guide Bearing Reservoir Tub. 1 � a 3 a PLAN SCALEl V -100' arrd R►s•cco ra r.ocs �nrano�r N�• REVISIONS DUKE POWE MOUNTAIN ISLAND YDROA STATION NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM (NPOES) POINT SOURCE DISCHARGES OEErrn a►tt �Nsf��uecGrerocoa -;;;z IL !Mt. DWG. NO. MI—NPOES-1 24 G' I... ELEVATION LEGEND (LOOKING UPSTREAM) 001 - Unit 1 Lube Oil Cooler Cooling Water Discharge To Tailwater Through Turbine Shaft Water Cooled Wood Guide Bearing Reservoir Tub. 002 - Unit 2 Lube Oil Cooler Cooling Water Discharge To Tailwater Through Turbine Shaft Water Cooled Wood Guide Bearing Reservoir Tub. 003 - Unit 3 Lube Oil Cooler Cooling Water Discharge To Tailwater Through Turbine Shaft Water Cooled Wood Guide Bearing Reservoir Tub. 004 - Unit 4 Lube Oil Cooler Cooling Water Discharge To Tailwater Through Turbine Shaft Water Cooled Wood Guide Bearing Reservoir Tub. NO.I REVISIONS NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM INPOES) POINT SOURCE DISCHARGES ��seccrco DWG. NO. MI-NPOES-2 a Is Station (Attachment 8) Duke Power Company N.C. Hydroelectric Facilities Table of Water Flows Total Turbine Water Flow at Best Efficiency (B.E.) (MGD) Max. Once - Through Cooling Water (Service Water) Flow (MGD) % Max. Once - Through Cooling Water vs. Turbine Water Flow at B.E. Bridgewater 1353 0.004 0.0003 Cowans Ford 26450 8.491 0.0320 Lookout Shoals 2623 0.020 0.0008 Mountain Island 5907 0.173 0.0029 Oxford 3502 0.087 0.0025 Rhodhiss 3878 0.027 0.0007 Tuxedo 270 0.043 0.0159 State of North Carolina Department of Environment, Health and Natural Resources Division of Environmental Management James B. Hunt, Jr., Governor Jonathan B. Howes, Secretary A. Preston Howard, Jr., P.E., Director M. D. Macintosh 13339 Hager Ferry Road Huntersville, NC 28078 Dear Mr. Macintosh: IN C) FEE HNF1 March 31, 1994 Subject: General Permit No. NCG500000 Mountain Island Hydroelectric Station COC NCG500131 Mecklenburg County In accordance with your application for discharge permit received on July 1, 1993, we are forwarding herewith the subject certificate of coverage to discharge under the subject state - NPDES general permit. This permit is issued pursuant to the requirements of North Carolina General Statute 143-215 .1 and the Memorandum of Agreement between North Carolina and the US Environmental Protection agency dated December 6, 1983. If any parts, measurement frequencies or sampling requirements contained in this permit are unacceptable to you, you have the right to request an individual permit by submitting an individual permit application. Unless such demand is made, this certificate of coverage shall be final and binding. Please take notice that this certificate of coverage is not transferable except after notice to the Division of Environmental Management. The Divsion of Environmental Management may require modification or revocation and reissuance of the certificate of coverage. This permit does not affect the legal requirements to obtain other permits which may be required by the Division of Environmental Management or permits required by the Division of Land Resources, Coastal Area Management Act or any other Federal or Local governmental permit that may be required. If you have any questions concerning this permit, please contact Ms. Susan Robson at telephone number 9191733-5083. Sincerely, Original Signed By Co100 A'WHstbA18ward, Jr., P. E. cc: Fran McPherson Mooresville Regional Office P.O. Box 29535, Raleigh, North Carolina 27626-0535 Telephone 919-733-7015 FAX 919-733-2496 An Equal Opportunity Affirmative Action Employer 50% recycled/ 10% post -consumer paper STATE OF NORTH CAROLINA DEPARTMENT OF ENVIRONMENT, HEALTH, AND NATURAL RESOURCES DIVISION OF ENVIRONMENTAL MANAGEMENT TO DISCHARGE NON -CONTACT COOLING WATER, COOLING TOWER AND BOILER BLOWDOWN, CONDENSATE AND SIMILIAR WASTEWATERS UNDER THE In compliance with the provision 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 Power Company is hereby authorized to continue operation of four (4) electricity generators which generate non -contact cooling water with the discharge of the cooling water from four (4) outfalls from a facility located at Mountain Island Hydroelectric Station NC Highway 273 north of Mount Holly Gaston County to receiving waters designated as the Catawba River in the Catawba River Basin in accordance with the effluent limitations, monitoring requirements, and other conditions set forth in Parts I, II, III and IV of General Permit No. NCG500000 as attached. This certificate of coverage shall become effective March 31,1994 This Certificate of Coverage shall remain in effect for the duration of the General Permit Signed this day March 31,1994 Original Signed By Coleen H. Sullins A. Preston Howard, Jr., P.E.,Director Division of Environmental Management By Authority of the Environmental Management Commission IMP SIAIyD iiDRD W)ij G50DI31 F1ssw K) !I IQ ;; To: Permits and Engineering Unit Water Quality Section Attention: Susan Robson SOC PRIORITY PROJECT: No Date: September 17, 1993 NPDES STAFF REPORT AND RECOMMENDATIONS County: Gaston NPDES Permit No.: NCG500131 MRO No.: 93-182 PART I - GENERAL INFORMATION 1. Facility and Address: Mountain Island Hydro Station c/o Duke Power Company 13339 Hagers Ferry Road Huntersville, N.C. 28078-7929 2. Date of Investigation: September 14, 1993 3. Report Prepared By: Michael L. Parker, Env: 03-0�-33 4. Person Contacted and Telephone Number: Jeni (704) 875-4610, Dam - 827-2311. 5. Directions to Site: From the jct. of hwy. 16 north of the Town of Mount Holly, travel 273 miles and turn left on a gravel access road (no SR number). The Dam is located at the end of this road. 6. Discharge Point(s), List for all discharge Points: - Latitude: 350 20' 03" Longitude: 800 59' 12" Attach a USGS Map Extract and indicate treatment plant site and discharge point on map. USGS Quad No.: F 15 SW 7. Site size and expansion area consistent with application: There is basically no area available for the construction of WWT facilities, if necessary. 8. Topography (relationship to flood plain included): Hilly, 5-20% slopes. 9. Location of Nearest Dwelling: Approx. 1000+ feet from the site. Page Two 10. Receiving Stream or Affected Surface Waters: Catawba River (Lake Wylie) a. Classification: WS-IV CA b. River Basin and Subbasin No.: Catawba 030833 C. Describe receiving stream features and pertinent downstream uses: The receiving stream is the main channel of the Catawba River. The area is used for primary and secondary recreation and receives bodily contact from various recreational activities. Downstream users include municipal and industrial WWTPs. There are no municipal water intakes located within several miles below (downstream) this facility. PART II - DESCRIPTION OF DISCHARGE AND TREATMENT WORKS 1. a. Volume of Wastewater: 0.1728 MOD (Total flow for all discharges) b. What is the current permitted capacity: N/A C. Actual treatment capacity of current facility (current design capacity): N/A d. Date(s) and construction activities allowed by previous ATCs issued in the previous two years: N/A e. Description of existing or substantially constructed WWT facilities: There are no existing WWT facilities nor are any proposed. f. Description of proposed WWT facilities: N/A g. Possible toxic impacts to surface waters: None expected. h. Pretreatment Program (POTWs only): N/A 2. Residual handling and utilization/disposal scheme: No residuals will be generated at this facility. 3. Treatment Plant Classification: Less than 5 points; no rating (include rating sheet). Facility does not met the minimum criteria for a class I rating. 4. SIC Code(s): 4911 Wastewater Code(s): Primary: 14 Secondary: N/A 5. MTU Code(s): 00000 PART III - OTHER PERTINENT INFORMATION 1. Is this facility being constructed with Construction Grant Funds or are any public monies involved (municipals only)? No Page Three 2. Special monitoring or limitations (including toxicity) requests: None at this time. 3. Important SOC/JOC or Compliance Schedule dates: N/A 4. Alternative Analysis Evaluation: N/A PART IV - EVALUATION AND RECOMMENDATIONS The applicant requests issuance of an NPDES GP Permit for the discharge of non -contact cooling water from a hydro electric dam. The dam has four (4) electricity generators which discharge thrust bearing cooling water through turbine shafts located at the base of the dam (outfalls 001-004). Each turbine can discharge up to 0.04320 MGD for a total discharge flow of 0.1728 MGD. Operation of the dam is intermittent depending on the power needs of Duke Power's electrical system. It is recommended that a GP be issued as requested. Si nature o. eport Preparer Date Water QuajXty Region Supervisor Date MtiUel AT R I7c IARb OYDRZ ia`i-I0� KCG56013I FIB S�•l ... � •roe r er g ..._ .. _.... _. ..._ . ,. !MOUNT HOLGYI MOUNT "Otty o N c Y ! � 6W �1 a ,%� ,�.>�'Q�j. (� A � 1� '. � ��V��.� � fill °I (( ° � - � o -1 � r. �� l �A yyi gt A,• N`ti. L 9� � 1 a��11_'�, �II� ��r � 1 � i � ° � ti �_� � p �c ��• �^. - _ �;��}, S� N� •A''rR�j, �V 14 ��` c9 } �).� l �V V �� G N V A' O Ot �1Fui� \cello Q i fl V � • � _ � l � � �-- � � S� � l,l, ' � r or y, � `. 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