NC0027341_Fact Sheet_20180730

DEQ/ DWR / NPDES
EXPEDITED FACT SHEET - NPDES PERMIT DEVELOPMENT
NPDES Permit NCO027341
Derek Denard, Compliance & Expedited Permitting Unit / 919-807-6307 30Jul2Ol8
Facility Information
Applicant/Facility Name
Tennessee Valley Authority/ Fontana Hydro Plant
Applicant Address
1101 Market Street, BR4A, Chattanooga, TN 37402
Facility Address
Power House Rd (off NC -28), Fontana Dam, NC 28733
Permitted Flow (MGD)
Not limited
Type of Waste
100% industrial; SIC: 4911 Primary: 48
cooling waters and wastewaters associated with Hydroelectric operations
Facility Class
PCNC
County
Graham
Permit Status
Renewal
Regional Office
ARO
Stream Characteristics
Receiving Stream
Little Tennessee River
(Cheoah Lake,
Calderwood Lake)
Stream Classification
Cjr
Stream Segment
2-(167)
Drainage basin
Little Tennessee
Summer 7Q10 (cfs)
—
Subbasin
HUC
04-04-02
060102040401
Winter 7Q10 (cfs)
—
Use Support
2014: 2-(167)a:
Supporting (Cat 2)
30Q2 (cfs)
—
303(d) Listed
Average Flow (cfs)
—
State Grid
F3NW
IWC (%)
—
USGS Topo Quad
Fontana Dam, NC
FACILITY SUNIlVIARY: The Fontana Hydro Plant produces electricity via hydraulic turbine generation.
The facility produces an average of 2,548 megawatt -hours per day of power, with peak power generation at
7,051 megawatt -hours per day.
The plant has three permitted outfalls as follows:
Outfall monthly avg. flow (gpd)
001: station pump flow
from wheel pit leakage and power house floor drains 1,872,000
002: discharge unwatering sump water 4,890,000
003-005: discharge non -contact cooling water 3,900,000
006: discharge lower, intermediate, and upper gallery's leakage 163,000
Total 10,825,000
RENEWAL SUNIlVIARY:
We have made the following updates for the final permit:
1. The facility classification Physical Chemical Not Classified has been added to the effluent page.
2. Footnote 1 for Outfalls 001, 002 and 003 has been updated to the following:
Electronic Reporting of Discharge Monitoring Reports (eDMR):
a. The Permittee shall submit Discharge Monitoring Reports electronically using NC DWR's
eDMR application system. See Condition A. (6).
Fact Sheet
Renewal 2018 -- NPDES Permit NCO027341
Page 1

b. Monitoring results obtained during the previous calendar quarter shall be recorded and reported
in eDMR no later than the 30'h day following the completed reporting period. The first DMR is
due on the 30'h day of the month following the calendar quarter in which the permit was issued.
[Quarterly reporting for this permit is in exception to NPDES standard conditions found in Part
I, A. (6.) and Part II, D. (2.). wherein monthly reporting is indicated.]
3. Footnote 5 for Outfalls 001, 002 & 006 has been updated to read "In lieu of monitoring pH and
O&G".
The Division has made the following updates for permit renewal:
4. The facility map has been updated.
5. Regulatory citations have been added.
6. Electronic reporting of discharge monitoring reports (eDMR) has been added in Section A. (6.).
7. The sample types for Oil & Grease, pH and Temperature have been indicated as grab.
8. A new parameter Free Oil Visual Sheen [51689] has been added to the effluent tables for Outfalls
001, 002 and 006 to record visual inspection of the tailrace. Monitoring for this parameter is at least
once per quarter by estimate. See footnote 3 in the permit for more information.
9. For Outfalls 001, 002 and 006, Footnote 4 has been added as a new requirement: If oil sheen or
visible foam (other than trace amounts) are present, monitoring of the following parameters is
required until presence of oil or foam is abated: pH and O&G.
10. For Outfalls 001, 002 and 006, Footnote 5 has been added indicating that BMPs can be employed in
lieu of monitoring.
11. For Outfalls 003, 004 and 005, semi-annual monitoring has been indicated for Temperature and pH.
12. Special Condition A. (5.) for Use of Biocides has been added.
PARAMETERS OF CONCERN:
For Outfalls 001, 002 & 006:
Footnotes:
Electronic Reporting of Discharge Monitoring Reports (eDMR):
a. The Permittee shall submit Discharge Monitoring Reports electronically using NC DWR's eDMR application
system. See Condition A. (5).
b. Monitoring results obtained during the previous calendar quarter shall be recorded and reported in eDMR no later
than the 30' day following the completed reporting period. The first DMR is due on the 30' day of the month
following the calendar quarter in which the permit was issued. [Quarterly reporting for this permit is in exception
to NPDES standard conditions found in Part I, A. (5.) and Part II, D. (2). wherein monthly reporting is indicated.]
Sample locations: E — Effluent
Free Oil Visual Sheen:
a. The tailrace shall be visually inspected for oil sheens at least once a quarter at this hydroelectric facility.
Fact Sheet
Renewal 2018 -- NPDES NCO027341
Page 2
LIMITS
MONITORING REQUIREMENTS
1
EFFLUENT CHARACTERISTICS
Sample
[parameter codes]
MonthlyDaily
Measurement
Sample
2
Average
Maximum
Frequency
Type
Location
Flow (MGD)
50050
Monitor & Report a
Quarterly
Estimate
E
Free Oil Visual Sheen (yes=1 no=0) 3'4
51689
Monitor & Report
Quarterly
Estimate
E
pH (su) 4,5,6
00400
Monitor & Report 6, b
Footnotes 4, 5
Grab c
E
Oil & Grease (O&G) (mg/L) 4'S
00556
15 mg/L d
20 mg/L d
Footnotes 4, 5
Grab c
E
Footnotes:
Electronic Reporting of Discharge Monitoring Reports (eDMR):
a. The Permittee shall submit Discharge Monitoring Reports electronically using NC DWR's eDMR application
system. See Condition A. (5).
b. Monitoring results obtained during the previous calendar quarter shall be recorded and reported in eDMR no later
than the 30' day following the completed reporting period. The first DMR is due on the 30' day of the month
following the calendar quarter in which the permit was issued. [Quarterly reporting for this permit is in exception
to NPDES standard conditions found in Part I, A. (5.) and Part II, D. (2). wherein monthly reporting is indicated.]
Sample locations: E — Effluent
Free Oil Visual Sheen:
a. The tailrace shall be visually inspected for oil sheens at least once a quarter at this hydroelectric facility.
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Renewal 2018 -- NPDES NCO027341
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b. Chemical wheel pit cleaning is permitted on a monthly basis. When cleaning of the wheel pit occurs, the tailrace
shall be inspected visually for foam and oil. Cleaning shall be conducted only with pre -approved solvents. Should
the Permittee wish to change cleaning solvents, a written request should be made to the Division including the
MSDS for the proposed solvent. See Use of Biocides — Special Condition A. (4.).
c. Free Oil Visual Sheen shall be reported by entry of the one of the following codes into eDMR:
Yes = 1 (Oil Sheen Visible)
No = 0 (Oil Sheen Not Visible).
If oil sheen or visible foam (other than trace amounts) are present, monitoring of the following parameters is required
until presence of oil or foam is abated: pH and O&G.
Best Management Practices (BMPs) f: In lieu of monitoring pH and O&G, BMPs must be employed to ensure that
excessive pollutants are not discharged to the surface waters of the State. These practices should include, as a
minimum, changing oil absorbent pads quarterly and cleaning accumulated sediment in the bottom of the sump
routinely. When these activities occur confirmation that BMPs have been followed shall be clearly noted in the
comments section of eDMR.
The pH shall not be less than 6.0 standard units nor greater than 9.0 standard units unless ambient river conditions
prevent compliance with this range.
Conditions:
• This permit does not limit mechanical cleaning operations, which do not contribute any wastewater to the discharge.
Non -discharging cleaning operations may be conducted as often as necessary to ensure safety and proper facility
operation.
• There shall be no discharge of floating solids or visible foam (other than trace amounts) in the effluent.
• All samples collected should be form a representative discharge event, a measurable discharge event that results in an
actual discharge from the permitted discharge outfall.
Permitting Notes:
a. Flow is not limited.
b. 15A NCAC 02B .0211 (14) pH: shall be normal for the waters in the area, which range between 6.0 and 9.0
except that swamp waters may have a pH as low as 4.3 if it is the result of natural conditions;
c. Grab sampling is required by 15A NCAC 02B .0505 (c)(3)(C).
d. Technology based limits for Oil & Grease.
e. 15A NCAC 02B .0211 (12) Oils, deleterious substances, colored, or other wastes: only such amounts as
shall not render the waters injurious to public health, secondary recreation, or to aquatic life and wildlife, or
adversely affect the palatability of fish, aesthetic quality, or impair the waters for any designated uses. For
the purpose of implementing this Rule, oils, deleterious substances, colored, or other wastes shall include
substances that cause a film or sheen upon or discoloration of the surface of the water or adjoining
shorelines pursuant to 40 CFR 110.3(a) -(b) which are hereby incorporated by reference including any
subsequent amendments and additions. This material is available, free of charge, at: http://www.ecfr.gov/
£ The following is information from the EPA webpage Learn About Effluent Guidelines
(https://www.epa.gov/eg/leam-about-effluent-guidelines):
"BMPs: Best Management Practices are defined as a permit condition used in place of, or in
conjunction with effluent limitations, to prevent or control the discharge of pollutants. BMPs may
include a schedule of activities, prohibition of practices, maintenance procedure, or other management
practice. Sections 304(e), 308(a), 402(a), and 501(a) of the CWA authorize EPA to prescribe BMPs as
part of Effluent Guidelines and Standards or as part of a permit.
BMP regulations:
• Direct dischargers: 40 CFR 122.2, 40 CFR 122.44(k)
• Indirect dischargers: 40 CFR 403.3(e)
CWA section 304(e) authorizes EPA to include BMPs in Effluent Guidelines for certain toxic or
hazardous pollutants for the purpose of controlling "plant site runoff, spillage or leaks, sludge or waste
disposal, and drainage from raw material storage." CWA section 402(a)(1) and 40 CFR 122.44(k) also
provide for BMPs to control or abate the discharge of pollutants when numeric limitations and
standards are infeasible."
Fact Sheet
Renewal 2018 -- NPDES NCO027341
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For Outfall 003, 004 & 005:
EFFLUENT CHARACTERISTICS
[parameter codes]
LIMITS
MONITORING REQUIREMENTS
1
Monthly
Average
Daily
Maximum
Measurement
Frequency
Sample
Type
Sample
2
Location
Flow (MGD)
50050
Monitor & Report 9
Semi-annually
Estimate
E
Temperate (°C) 3
00010
Monitor & Report 3, h
Semi-annually
Grab'
E
pH (su) 4
00400
Monitor & Report 4,
Semi-annually
Grab'
E
Footnotes:
1. Electronic Reporting of Discharge Monitoring Reports (eDMR):
a. The Permittee shall submit Discharge Monitoring Reports electronically using NC DWR's eDMR application
system. See Condition A. (5.).
c. Monitoring results obtained during the previous calendar quarter shall be recorded and reported in eDMR no later
than the 30' day following the completed reporting period. The first DMR is due on the 30' day of the month
following the calendar quarter in which the permit was issued. [Quarterly reporting for this permit is in exception
to NPDES standard conditions found in Part I, A. (5.) and Part II, D. (2.). wherein monthly reporting is indicated.]
2. Sample locations: E - Effluent
3. The temperature of the effluent will be regulated so that the temperature of the receiving stream does not increase
more than 2.8°C above the natural water temperature. Receiving water temperature shall not exceed a maximum of
29°C due to the facility's operation. h
4. The pH shall not be less than 6.0 standard units nor greater than 9.0 standard units unless ambient river conditions
prevent compliance with this range.
Conditions:
• All non -contact cooling water sample locations shall provide representative samples of the discharge and require
sampling prior to discharge commingling with any other waters or substances, such as stormwater or surface water to
enable characterization of a pollutant of concern.
• There shall be no discharge of floating solids or visible foam (other than trace amounts) in the effluent.
• All samples collected should be form a representative discharge event, a measurable discharge event that results in an
actual discharge from the permitted discharge outfall.
Permitting Notes:
g. Flow is not limited.
h. 15A NCAC 02B .0211 (18) Temperature: not to exceed 2.8 degrees C (5.04 degrees F) above the
natural water temperature, and in no case to exceed 29 degrees C (84.2 degrees F) for mountain and
upper piedmont waters and 32 degrees C (89.6 degrees F) for lower piedmont and coastal plain Waters;
the temperature for trout waters shall not be increased by more than 0.5 degrees C (0.9 degrees F) due
to the discharge of heated liquids, but in no case to exceed 20 degrees C (68 degrees F).
i. Grab sampling is required by 15A NCAC 02B .0505 (c)(3)(C).
j. 15A NCAC 02B .0211 (14) pH: shall be normal for the waters in the area, which range between 6.0
and 9.0 except that swamp waters may have a pH as low as 4.3 if it is the result of natural conditions.
COMPLIANCE HISTORY: No compliance issues noticed with the past five (5) years.
DATA SUMMARY: SeD2013-F62018
Parameter =
Outfall =
Max Win
jAveragelCount
UoM
850050 - Flow, in conduit or thna treatment plant
001
0.72 0.721 0.7201 18
mgd
002
0.41 0.41 0.410 10
mgd
003
1.3 1.300 15
mgd
004
-1.3
1.3 1.3 1.300 16
mgd
005
_
1.3 1.3 1.300 16
mgd
006
0.091 0.091 0.091 18
mgd
Fact Sheet
Renewal 2018 -- NPDES NCO027341
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