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HomeMy WebLinkAboutNC0027332_Renewal (Application)_201703104 Water Resources ENVIRONMENTAL QUALITY March 10, 2017 Mr. David Sorrick, Senior Vice President Tennessee Valley Authority 1101 Market Street, BR4A Chattanooga, TN 37402 Subject: Permit Renewal Application No. NCO027332 Chatuge Hydro Plant Clay County Dear Mr. Sorrick: ROY COOPER Governor MICHAEL S. REGAN Acting Secretmv S. JAY ZIMMERMAN Director The Water Quality Permitting Section acknowledges receipt of your permit application and supporting documentation received on February 27, 2017. The primary reviewer for this renewal application is John Hennessy. The primary reviewer will. review your application, and he will contact you if additional information is required to complete your permit renewal. Per G.S. 15OB-3 your current permit does not expire until permit decision on the application is made. Continuation of the current permit is contingent on timely and sufficient application for renewal of the current permit. Please respond in a timely manner to requests for additional information necessary to complete the permit application. If you have any additional questions concerning renewal of the subject permit, please contact John Hennessy at 919-807-6377 or John.Hennessy@ncdenr.gov. cc: Central Files NPDES . Asheville Regional Office Sincerely, ?A" %Ciec pld Wren Thedford Wastewater Branch State of North Carolina I Environmental Quality I Water Resources 1617 Mail Service Center I Raleigh, North Carolina 27699-1617 919-807-6300 d Tennessee Valley Authority, 1101 Market Street, BR4A, Chattanooga, Tennessee 37402 February 16, 2017 Ms. Wren Thedford North Carolina Department of Environmental Quality Division of Water Resources NPDES Unit 16,17 Mail Service Center Raleigh, North Carolina 27699-01617 Dear Ms. Thedford: TENNESSEE VALLEY AUTHORITY (TVA) - CHATUGE HYDRO (CTH)- NPDES PERMIT NO. NCO027332 - PERMIT RENEWAL APPLICATION Enclosed are one signed original and two copies of a complete NPDES permit renewal application for CTH. There have been no changes since the issuance of the last permit. Solids may be removed from the station sump manually or using a vacuum truck or similar device. The waste is analyzed for hazardous constituents and "characterized for appropriate disposal. Any oil absorbent materials removed from the station sump are handled in a similar manner. TVA requests that the following, which is consistent with language currently in General Permit No. NCG500000 for discharges associated with hydroelectric operations, be included in the renewed NPDES permit for CTH: Submittal of monthly Discharge Monitoring Reports (DMRs) shall not be required except upon demand by the Division. This section supersedes the requirement for submitting monthly Discharge Monitoring Reports (DMRs) specified in Part U., Section D.2. of this permit. Even though the submittal of the monthly monitoring reports to the Division is suspended, all monitoring requirements remain. The data will be maintained on site for a period of not less than three years. TVA requests a 30 -day period between the issuance date and the effective date of the reissued permit. If you have questions or need additional information, please contact Mike Stiefel by email at mbstiefel@tva.gov or by phone at (423) 751-6844. Sincerely, CZ�L✓ Terry - Cheek Senior Manager Water Permits, Compliance, and Monitoring Enclosures Ir - Ms. Wren Thedford Page 2 February 16, 2017 MBS:SMF Enclosures cc (Enclosures - Electronic Distribution): C. B. Cothron, BR 4A -C A. R. Deimling, RAC 1A -C A. L. Moore, OHP 1A-BNT C. M. Richards, MR BA -C ECM, ENVrecords NPDES PERMIT APPLICATION — SNORT FORM C — Minor Industrial Minor industrial, manufacturing and commercial facilities. Mail the complete application to: N. C. Department of Environment and Natural Resources Division of Water Quality / NPDES Unit 1617 Mail Service Center, Raleigh, NC 27699-1617 I. Contact Information: Owner Name Facility Name Mailing Address City State / Zip Code Telephone Number Fax Number e-mail Address NPDES Permit Number NC0027332 Please print or type. Tennessee Valley Authority - David W. Sorrick, Sr. VP Power Operations Chatuge Hydro Plant 1101 Market Street, LP 3K Chattanooga Tennessee 37402 (423) 751-4096 (423) 751-8978 dwsorrick@tva.gov 2. Location of facility producing discharge: Check here if same as above ❑ Street Address or State Road Chatuge Dam Road City near Hayesville State / Zip Code North Carolina, 28904 County Clay 3. Operator Information: Name of the firm, consultant or other entity that operates the facility. (Note that this is not referring to the Operator in Responsible Charge or ORC) Name Tennessee Valley Authority Mailing Address 1101 Market Street, LP 3K City Chattanooga State / Zip Code Tennessee 37402 Telephone Number (423) 751-4096 Fax Number (423) 751-7802 4. Ownership Status: Page 1 of 5 C -MI 10/08 r. NPDES PERMIT APPLICATION — SHORT FORM C — Minor Industrial Minor industrial, manufacturing and commercial facilities. Federal ® State ❑ Private ❑ Public ❑ S. Standard Industrial Classification (SIC) code(s): 4911 - Electric Services 6. Number of employees None (remotely operated from Hiwassee Hydro Plant) 7. Describe the treatment system List all installed waste treatment components with capacities, describe the processes that generate wastewaters. If the space provided is not sufficient attach a separate sheet of paper with the system description. Water discharged from the draft tube unwatering operations, powerhouse .floor drains, penstock envelope leakage and wheel pit leakage make-up the flows into the sumps for Outfalls 001 and 002. Oil absorbent pads are used in sumps and points of equipment oil leaks. These pads are changed at least once a quarter in addition to the removal of sediment to ensure that excessive pollutants are not discharged to surface waters of the State. It is assumed that the oil absorbent pads treat 100% of the oil and grease volume before discharge. 8. Is facility covered under federal effluent limitation guidelines? No ® Yes ❑ If yes, specify the category? 9. Principal product(s) produced: Electric Power Principal raw material(s) consumed: N/A Briefly describe the manufacturing process(es): TVA's conventional hydro plants typically include a dam to control the flow of a river, a powerhouse containing turbines and generators to make electricity, a switchyard to step up the electricity's voltage for distribution to customers, and a large reservoir of water behind the dam. Water from the upper reservoir flows through a penstock (a large pipe connecting the reservoir to the powerhouse) impacting the blades of a turbine. Water impacting the blades makes the turbine rotate. A large diameter shaft connects the rotating turbine to a generator in the powerhouse. The generator consists of a large rotating electromagnet (driven by the turbine) located'in the middle of an even larger set of stationary wire coils. When running at the proper speed (typically around 100 revolutions per minute for TVA hydro generators), electricity is produced in the coils at anywhere from about 13,000 to 23,000 volts. Generator leads take the electricity to the switchyard where the voltage is increased and put into the TVA transmission system for delivery to distributors across the Tennessee Valley. The water used to turn the turbine then flows out of the powerhouse in a draft tube where it is released into the water supply. Chatuge Hydro Plant has one conventional hydroelectric generating unit. Page 2 of 5 i , C -MI 10108 NPDES PERMIT APPLICATION - SHORT FORM C - Minor Industrial Minor industrial, manufacturing and commercial facilities. 10. Amount of principal product produced or raw material consumed rci c amounts consumed and/or units Product Produced or Raw Material Consumed per Day 81 mWh generation per Month 2,463 mWh generation per Year 29,561 mWh generation 11. Frequency of discharge: Continuous* If intermittent: Iuction over the last three years) Product Produced or Raw Material Consumed 336 mWh generation 9,708 mWh generation 41,798 mWh generation Intermittent ❑ Days per week discharge occurs: Duration: * While individual discharges may not flow continuously, it is unlikely that there would be no discharge from any outfall on any given day unless the unit is in outage. 12. Types of wastewater discharged to surface waters only Discharge Sanitary - monthly average Utility water, etc. - monthly average Process water - monthly average Stormwater - monthly average Other - monthly average Explain: Flow* (GALLONS PER No discharge to surface water N/A 960,000 (Outfall 001, Station Sump = 360,000 and Outfall 002, Umvatering Sump = 600,000**) N/A 648,000 (Outfall 003 - Noncontact Cooling Water) Monthly Average total discharge (all types):�� �1,6608,�00O *Note: Flows are estimated for average operating conditions using pump rated capacity or design capacity. **Unwal operations (Outfall 002) are intermittent and typically occur approximately once every two years. See attached flow schematic. 13. Number of separate discharge points: 3 Outfall Identification number(s) Outfalls 001 002, and 003 14. Name of receiving stream(s) (Provide a map showing the exact location of each outfall, including latitude and longitude): Hiwassee River See attached maDj Page 3 of 5 C -MI 10108 Tom_ NPDES PERMIT APPLICATION - SHORT FORM C - Minor Industrial Minor industrial, manufacturing and commercial facilities. 15. Effluent Data [for new or proposed discharges] Provide data for the parameters listed. Temperature and pH shall be grab samples, for all other parameters 24-hour composite sampling shall be used. If more than one analysis is reported, report daily maximum and monthly average. If only one analysis is reported, report as daily maximum. hrn,rF. Permittees reauestina renewal should complete the table ONLY for the parameters 16. List all permits, construction approvals and/or applications (check all that apply and provide permit numbers or check none if not applicable): Type Hazardous Waste (RCRA) UIC (SDWA) NPDES PSD (CAA) Non -attainment program (CAA) Permit Number Type NESHAPS (CAA) Ocean Dumping (MPRSA) NCO027332 Dredge or fill (Section 404 or CWA) Other Permit Number 17. List any chemicals that may be discharged (Please list and explain source and potential amounts.) Small amounts of Oil and Grease may be discharged from outfalls as oil containing equipment is located on site. Visual monitoring has occurred and BMPs have been implemented under the current permit. No visible sheens have been observed. C -MI 1010B Page 4 of 5 NPDES PERMIT APPLICATION - SHORT FORM C - Minor Industrial Minor industrial, manufacturing and commercial facilities. 18. Is this facility located on Indian country? (check one) Yes ❑ No 19. Applicant Certification I 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. C. Michael Richards Plant Maria er Printed name of Person Signing Title of Applicant North Carolina General Statute 143-215.6 (b)(2) provides that: Any person who knowingly makes any false statement representation, or certification in any application, record, report, plan, or other document files 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.) Page 5 of 5 C -MI 10/08 Potable Water Symbols Generator Air and Bearing Cooling Water Draft Tube Unwatering Operations INTAKE FROM CHATUGE RESERVOIR (HIWASSEE RIVER) Outfall ——•—•—•—•—•——._._._._._._._ _ _ 0_64§M'gl ._._._._ ._.* 003 Unwatering Sump 7.2 MGD .......................), 002 PowerHouse Floor Drains andPenstock Envelope ••••••......•..••...•--• ............. Leakage 1.44 MGD Station0 .................................................> 001 Sump Wheel Pit Leakage O"""" Unit1 ....................................30. Sanitary Sewage Drains Septic Tank -•-•-•...... Subsurface Disposal Field Raw River Water, Potable Water, Precipitation, Leakage, or Ground Water Non -Contact Cooling Water •'•"'•"" Other Wastewater OMotor -Driven Pump Notes: 1. All effluents discharge into the Hiwassee River. 2. Flows are based on pump -rated capacities and maximum design flows. Tennessee ValleyAuthority Chatuge Hydro Plant NPDES Permit No. NC 0027332 Clay County, North Carolina February 2017 N V, M m �14 j X lee. "x 00 Mile �g; 19-atd 290 t Jq Y' J Chatuge Hydro Plant 2A Outfalls 001 -003 A3yivvilfE Ce i-'arnard' j 4 .; j. / .� f, d\ SM WMK I S V J, CHAT U G [�-,M '- .`38E . Power intake"f6wer 0 U 1 0100 Plant e Z:77-� Intake nl ri GJbOV IsickM6 94.(�tRH 47 X 'l- Cl USR SIC I" -7V '22 N. AV •r M OM OSIR k r Tennessee Valley Authority Chatuge Hydro Plant — NCO027332 Sate Grid/Quad: G3SE/Hayesvilfe, NC Hiwassee River Latitude: 350 01' 09" N Longitude: 830 47'30"W Receiving Stream: Hiwassee River Stream Class: C N —5— Facility Location J not to scale NPIDES Permit No. NCO027332 Cherokee County