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Home My WebLink AboutNC0027341_Renewal Application_20190128 RECE{VEDIDENRIDWR FEB 0 2 2019 NA Water Resources Permitting Section Tennessee Valley Authority, 1101 Market Street, BR 4A, Chattanooga,Tennessee 37402 January 28, 2019 Ms. Wren Thedford North Carolina Department of Environmental Quality Division of Water Resources Water Quality Permitting Section - NPDES 1617 Mail Service Center Raleigh, North Carolina 27699-1617 Dear Ms. Thedford: TENNESSEE VALLEY AUTHORITY (TVA) - FONTANA HYDRO PLANT (FNH) - NPDES PERMIT NO. NC0027341 - REQUEST FOR PERMIT MODIFICATION Please find enclosed an updated short Form C, updated flow schematic, site map, and permit fee to modify the subject NPDES permit. During implementation of the semi- annual monitoring requirement for Outfalls 003, 004, and 005, TVA discovered the generator air cooling water and generator bearing cooling water combine within the dam structure at an inaccessible location for sampling. TVA has installed sampling taps on each of these cooling water systems per unit and proposes the permit be modified to split these outfalls into an A and B component where A represents the unit generator air-cooling water and B represents the unit generator bearing cooling water. TVA also requests references to quarterly monitoring and reporting in Footnote 1.b. on page 5 of 9 for Outfalls 003, 004, and 005 be replaced with a description for semi- annual monitoring and reporting to be consistent with the measurement frequency for these outfalls in the effluent limitations table. TVA believes the current language in the permit is an administrative oversight. If you have questions or need additional information, please contact Brad Love by email at bmlove@tva.gov or by phone at (423) 751-8518. Sincerely, ,71/c-C Terry E. Cheek Senior Manager Water Permits, Compliance, and Monitoring Enclosures P NPDES PERMIT APPLICATION - SHORT 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 NPDES Permit Number NC0027341 Please print or type. 1. Contact Information: Tennessee Valley Authority-Jacinda B. Woodward, Senior Vice Owner Name President, Power Operations Facility Name Fontana Hydro Plant Mailing Address 1101 Market Street, BR 4D-C City Chattanooga State / Zip Code Tennessee 37402 Telephone Number (423) 751-2022 Fax Number e-mail Address jbwoodward@tva.gov 2. Location of facility producing discharge: Check here if same as above ❑ Street Address or State Road NC Highway 28 City near Fontana Village State / Zip Code North Carolina, 28733 County Graham 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, BR 4D-C City Chattanooga State / Zip Code Tennessee 37402 Telephone Number (423) 751-2022 Fax Number 4. Ownership Status: Page 1 of 5 C-MI 10/08 NPDES PERMIT APPLICATION - SHORT FORM C - Minor Industrial Minor industrial, manufacturing and commercial facilities. Federal ® State ❑ Private ❑ Public ❑ 5. Standard Industrial Classification (SIC) code(s): 4911 - Electric Services 6. Number of employees: 5 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. Fontana Hydro Plant has three conventional hydroelectric generating units. Page 2 of 5 C-MI 10/08 NPDES PERMIT APPLICATION - SHORT FORM C - Minor Industrial Minor industrial, manufacturing and commercial facilities. 10. Amount of principal product produced or raw material consumed (List specific amounts consumed and/or units of production over the last three years) Product Produced or Raw Material Product Produced or Raw Material Consumed Consumed (AVERAGE) (PEAK) per Day 2,548 mWh generation 7,051 mWh generation per Month 77,578 mWh generation 213,413 mWh generation per Year 930,941 mWh generation 1,078,686 mWh generation 11. Frequency of discharge: Continuous* ® Intermittent ❑ If 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 all three units were in outage. 12. Types of wastewater discharged to surface waters only Discharge Flow* (GALLONS PER DAY) Sanitary - monthly average No discharge to surface water Utility water, etc. - monthly average N/A 6,925,000 (Outfall 001, Station Sump = 1,872,000 ** Outfall 002, Unwatering Sump = 4,890,000 and Process water - monthly average Outfall 006, Gallery Drains, Switchyard Main Lead Tunnel Drainage, &Air Compressor Cooling Water = 163,000) Stormwater- monthly average N/A Other- monthly average Explain: 3,900,000 (Noncontact Cooling Water) Monthly Average 10,825,000 total discharge (all types) *Note: Flows are estimated for average operating conditions using pump rated capacity or design capacity. **Unwatering operations(Outfall 002) are intermittent and typically occur approximately once every two years. See attached flow schematic. 13. Number of separate discharge points: 6 Outfall Identification number(s) Outfalls 001, 002, 003A and B, 004A and B, 005A and B, and 006 14. Name of receiving stream(s) (Provide a map showing the exact location of each outfall, including latitude and longitude): Little Tennessee River (See attached map) Page 3 of 5 C-MI 10/08 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. NOTE: Permittees requesting renewal should complete the table ONLY for the parameters currently monitored. Summarize the past 3 years of effluent data. Parameter Daily Monthly Units of Maximum Average Measurement Biochemical Oxygen Demand (BOD5) Chemical Oxygen Demand (COD) Total Organic Carbon TVA is applying for a permit modification Total Suspended Solids related to sampling generator air and bearing Ammonia as N cooling water. Temperature (Summer) Temperature (Winter) pH Fecal Coliform (If sanitary waste is present) Total Residual Chlorine (if chlorine is used) 16. List all permits, construction approvals and/or applications (check all that apply and provide permit numbers or check none if not applicable): Type Permit Number Type Permit Number Hazardous Waste (RCRA) NESHAPS (CAA) UIC (SDWA) Ocean Dumping (MPRSA) NPDES NC0027341 Dredge or fill (Section 404 or CWA) PSD (CAA) Other Non-attainment program (CAA) 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. Page 4 of 5 CM 10/08 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. William T. Pohlmann Fontana Hydro Plant Manager Printed name of Person Signing Title , � alir Signature of Applicant Date 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.) 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Outfalls 001 - 006 ' ' ())(---`-')/ 1, (11.- \\_.L..- -. , ., . -s . ---,,,--- if _ , , (-Ai. f-, ); ,\,..._____As,,,__—) I ... ,..,, ,,,,,„........„ ,,,,,( . .6,,---,--..-7— ..,-,-.,,,,, , t§...._44-,---..--_____,,)> ,,,J ,A - ' _ - i r• •-- • • .rir, ,, . .: 4 ___t_.:„....„. l __,•,--,,,=?,--- r...s,,,.it A-1., (---...6t4.___—:i , / r▪ ›C.---4-z: \ j. . _,,:/ dr .,sb/f(-S)e , -.1 / e.-_,,, r ' `-':.) vi.., (4,1 irr-(... _: .-:..--i< . .. ., ‘, ',,, ,„ , ,......,-, _,.. • „„ i--vs1 , _i ,-- lr.,:t.\.1v �rlll, °. \1 ]i i �-, Irt, .4,•-4:� I .r y. ► %!',reran.,,i rFe-,.� <-• Tennessee Valley Authority N Facility Location Fontana Hydro Plant — NC0027341 � , State Grid/Quad: F3NE/Fontana Dam, NC not to scale \ /-_- Latitude: 35°27' 06"N ) Longitude: 83'48' 17"W NPDES Permit No. NC0027341 Receiving Stream:Little Tennessee River Graham County Stream Class: C-Trout INTAKE FROM FONTANA RESERVOIR OUTFALL 0 SWITCHYARD MAIN LEAD NORMAL-0 MGD } TUNNEL DRAINAGE AIR COMPRESSOR _._._._._._._._._._ _._._._0_072MGD _•�,_ COOLING WATER > UPPER, LOWER,AND ! INTERMEDIATE 0.091 MGD + GALLERY DRAINS > 006 UNIT 1 1.30 MGD > GENERATOR AIR& UNIT 2 1.30 MGD BEARING COOLING WATER _._._._._._._._._._.-.-.-•-._._._•-•-•-•-•-•-•-•-> 004A and 004B (See notation below to UNIT 3 1.30 MGD distinguish between A and B) _._._.- -•-•- -•-•-'-•-•-•-•-•-'-•-•-'-'-•-•-•-•-> 005A and 005B 2.01 MGD 002 DRAFT TUBE : 2.88 MGD f > UNWATERING OPERATIONS (NOTE 4) Common FLOOR DRAINS • header UNITS 1-3 STATION , 0.72 MGD 001> SUMP O 1.152 MGD UNITS 1-3 WHEEL PIT LEAKAGE POTABLE WATER SANITARY SEWAGE SEPTIC SUBSURFACE (EST. MAX. 125 GPD) DRAINS TANK DISPOSAL FIELD SYMBOLS: RAW RIVER WATER, POTABLE WATER, RAIN WATER, OR GROUND WATER -•--- NON-CONTACT COOLING WATER OTHER WASTEWATER Q MOTOR-DRIVEN PUMP EDUCTOR O PRECIPITATION A REPRESENTS GENERATOR AIR COOLING WATER B REPRESENTS GENERATOR BEARING COOLING WATER NOTES: 1.ALL EFFLUENTS DISCHARGE INTO THE LITTLE TENNESSEE RIVER. 2. FLOWS(OTHER THAN FOR SANITARY WASTE)ARE MAXIMUM RATES TVA AND ARE BASED ON PUMP RATED CAPACITIES OR MAXIMUM DESIGN FONTANA HYDRO PLANT FLOW RATES. NPDES PERMIT NO. NC0027341 3.THE SANITARY WASTE FLOW IS AN ESTIMATED MAXIMIMUM. GRAHAM COUNTY, NC 4. UNWATERING OPERATIONS (OUTFALL 002) OCCUR APPROXIMATELY JANUARY 2019 ONCE EVERY TWO YEARS PER UNIT.