NC0027341_Renewal Application_20170310

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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. NCO027341
Fontana Hydro Plant
Graham County
Dear Mr. Sorrick:
ROY COOPER
Governor
MICHAEL S. REGAN
Acting Secretaty
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. 150B-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 [e-mail].
cc: Central Files
NPDES
Asheville Regional Office
Sincerely,
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

FVA
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
1617 Mail Service Center
Raleigh, North Carolina 27699-01617
Dear Ms. Thedford:
TENNESSEE VALLEY AUTHORITY (TVA) - FONTANA HYDRO (FNH) - NPDES PERMIT NO.
NC0027341 - PERMIT RENEWAL APPLICATION
Enclosed are one signed original and two copies of a complete NPDES permit renewal
application for FNH. 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 FNH:
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 Il., 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 Brad Love by email
at [e-mail] or by phone at [phone].
Sincerely,
Terry E. eek
Senior Manager
Water Permits, Compliance, and Monitoring
Enclosures

J
Ms. Wren Thedford
Page 2
February 16, 2017
MBS:SMF
Enclosures
cc (Enclosures - Electronic Distribution):
P. D. Davis, PP 1A -LCT
L. M. Perkey, GRN 2E -K
M. G. Tritapoe, BR 4A -C
ECM, ENVrecords

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
1. Contact Information:
Owner Name
Facility Name
Mailing Address
City
State / Zip Code
Telephone Number
Fax Number
e-mail Address
NPDES Permit Number INCO027341
Please print or type.
Tennessee Valley Authority - David W. Sorrick, Senior Vice
President, Power Operations
Fontana Hydro Plant
1101 Market Street, LP 3K
Chattanooga
Tennessee 37402
[phone]
[phone]
dwsorrick cvtva.gov
2. Location of facility producing discharge:
Check here if same as above ❑
Street Address or State Road
City
State / Zip Code
County
NC Highway 28
near Fontana Village
North Carolina, 28733
Graham
3. Operator Information:
Name of the firm, consultant or other entity that operates the facility. (Note that this is riot 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 [phone]
Fax Number [phone]
4. Ownership Status:
Page 1 of 5
C -MI 10!08

NPDES PERMIT APPLICATION - SNORT 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 on
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 10108

NPDES •PERMIT APPLICATION - SNORT FORM C - Minor Industrial
Minor industrial, manufacturing and commercial facilities.
10. Amount of principal product produced or raw material consumed
(List snedl/ic amounts consumed nnd/nr rtnit-c of nrnrlurtinn nr,or ilio l-ot th,��
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
Product Produced or Raw Material
Consumed
AVERAGE
Product Produced or Raw Material
Consumed .
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, Umtratering 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
total discharge (all types)
10,825 000
u+..a.cu .wwcIasc upciauiig comuuons using pump rated capacity or design capacity. —Un atering
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, 003. 004, 005, 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 10108

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 pl-1 shall be grab samples, for all other paranieters 24-hour
composite saniplirig shall be used. If more than one analysis is reported, report daily niaxiniuni art(-] niorithly average.
If only one analysis is reported, report as daily niariniuni.
NOTE: Permittees requesting renewal should complete the table ONLY for the parameters
eurrentlu mnnitnrP_r7_ S7/mmnr4onp ti, Wise+ Z ­iss•c .,r—mv-11 .4 4.
Parameter
Daily
Maximum
Monthly
Average
Units of
Measurement
Biochemical Oxygen Demand (BODS)
Chemical Oxygen Demand (COD)
Total Organic Carbon
TVA is applying for permit renewal.
Currently no analytical monitoring is
required. Best Management Practices have
been implemented and visual inspections of
the tailrace have been performed in
accordance with the current NPDES permit.
Total Suspended Solids
Ammonia as N
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
riunibers or check none if not applicabler
Type
Hazardous Waste (RCRA)
UIC (SDWA)
NPDES
PSD (CAA)
Non -attainment program (CAA)
Permit Number Type
NESHAPS (CAA)
NCO027341
Ocean Dumping (MPRSA)
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.
Page 4 of 5 C -MI 10108

z
NPDES PERMIT APPLICATION — SNORT FORM C — Minor Industrial
Minor industrial, manufacturing and commercial facilities.
18. Is this facility located on Indian country? (c/ieck 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.
Philip D. Davis Senior Manager Regional Hydro Generation
Printed name of Person Signing Title
Signature of
X/,
t
2A/;.
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.)
Page 5 of 5
C -MI 10108

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✓�l:,r�/,'� �,f`�_ Outfalls 001 - 006
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Tennessee Valley Authority
Fontana Hydro Plant — NCO027341
State Grid/Quad: F3NE/Fontana Dam, NC
Latitude: 350 27' 06" N
Longitude: 83148' 17"W
Receiving Stream: Little Tennessee River
Stream Class: C -Trout
N Facility Location
not to scale
NPDES Permit No. NC0027341
Graham County

INTAKE FROM FONTANA RESERVOIR OUTFALL
SWITCHYARD MAIN LEAD I NORMAL - 0 MGD
TUNNEL DRAINAGE
AIR COMPRESSOR 0_072,MGD•
COOLING WATER _j
UPPER, LOWER, AND i
INTERMEDIATE 0.091 MGD
GALLERYDRAINS....................................................................•............................................ > 006
UNIT -1 ._,_,_._._._. 1.30 MGD
-•-•-> 003
GENERATOR AIR & _ UNIT 2 0 �_ -
BEARING COOLING WATER -------------­-­-- > 004
_•_,_,_,_• ------ 1.30 MGD
---------._.--•-•-> 005
DRAFT TUBE 2.01 MGD 002
UNWATERING OPERATIONS 2.88 MGD
(NOTE 4)
FLOOR DRAINS I
UNITS 1-3
STATION 0.72 MGD 001>�
SUMP 1 152 MGD €
.......................�............................
UNITS1-3 .......................
WHEEL PIT LEAKAGE
POTABLE WATER SANITARY SEWAGESEPTIC SUBSURFACE
(EST. MAX. 125 GPD) 30 DRAINS ."".""'
TANK DISPOSAL FIELD
SYMBOLS:
RAW RIVER WATER, POTABLE WATER, RAIN WATER, OR GROUND WATER
NON -CONTACT COOLING WATER
......•••••• OTHER WASTEWATER
O MOTOR -DRIVEN PUMP
0 EDUCTOR
O PRECIPITATION
NOTES:
Common
header
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. NCO027341
3. THE SANITARY WASTE FLOW IS AN ESTIMATED MAXIMIMUM. GRAHAM COUNTY, NC
4. UNWATERING OPERATIONS (OUTFALL 002) OCCUR APPROXIMATELY FEBRUARY 2017
ONCE EVERY TWO YEARS PER UNIT.