NCG500591_Permit (Issuance)_20010119

State of North Carolina
Department of Environment
and Natural Resources
Division of Water Quality
Michael F. Easley, Governor
Sherri Evans -Stanton, Acting Secretary
Kerr T. Stevens, Director
January 19, 2001
Mr. Barry Amey, Manager — Hydroelectric Operations
Carolina Power and Light
P.O. Box 1551
Raleigh, NC 27602
Dear Mr. Arney:
AVA
NCDENR
NORTH CAROLINA DEPARTMENT OF
ENVIRONMENT AND NATURAL RESOURCES
Subject: General Permit No. NCG500000
Marshall Hydroelectric Plant
COC NCG500591
Madison County
In accordance with your application for a discharge permit received on August 9, 2000 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.
Upon issuance of this new Certificate of Coverage your existing permit, NC0027545, is
rescinded simultaneously.
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 Water Quality. The Division of Water Quality 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 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 Aisha Lau at telephone number
[phone] ext. 578.
Sincerely,
MNN Rfewn
Po +;
Kerr 6teverry
cc: Asheville Regional Office
Central Files
Stormwater and General Permits Unit Files
Point Source Compliance — Mr. Robert Farmer
Budget — Ms. Fran McPherson
1617 Mail Service Center, Raleigh, NC 27699-1617 Telephone [phone] FAX [phone]
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. NCG500591
TO DISCHARGE NON -CONTACT COOLING WATER, COOLING TOWER AND BOILER SLOWDOWN,
CONDENSATE AND SIMILAR WASTEWATERS UNDER THE
NATIONAL POLLUTANT DISCHARGE ELINIINATION 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,
Carolina Power and Light Company
is hereby authorized to discharge water associated with hydroelectic operations from a facility located at
Marshall Hydroelectic Plant
40 N. Bear Creek Road
Marshall
Madison County
to receiving waters designated as the French Broad River, a class C stream in the French Broad 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 January 19, 2001.
This Certificate of Coverage shall remain in effect for the duration of the General Permit.
Signed this day January 19, 2001.
ORIINALVONMPI
Kerr T. Stevens, Director
Division of Water Quality
By Authority of the Environmental Management Commission

Copyright (C) 1997, Maptech, Inc.

Markers
Name: NCG500591 Marshall Hydroelectric Plant
Short Name: 500591
Coordinates: 035° 47' 33.1" N, 082° 42' 36.7" W
Comment: County: Madison, Map #: D8SW, Subbasin: 040304, Receiving Stream: French
Broad River, Class: C

CP&L
Carolina Power & Light Company
PO Box 1551
411 Fayetteville Street Mall
Raleigh NC 27602
JUL 2 5 103
DENR-WATER QUALITY
POINT SOURCE BRANCH
Mr. David Goodrich
North Carolina Department of Environment and Natural Resources
Division of Water Quality
1617 Mail Service Center
Raleigh, NC 27699-1617
Subject: Marshall Hydroelectric Facility
NPDES Permit No. NC0027545
Conversion of Individual to General Permit
Dear Mr. Goodrich:
Carolina Power and Light Company's Marshall Hydroelectric Plant currently discharges
wastewater in accordance with an individual NPDES permit (NC0027545). CP&L is
interested in modifying Marshall Plant such that it is similar in its operation as the other
hydroelectric plants owned by CP&L. These hydroelectric plants — Blewett, Tillery, and
Walters — are covered under general permit NGC500000. To allow Marshall Plant to be
eligible for general permit NGC500000, CP&L would modify the plant to reroute all
potentially contaminated wastewater to the sumps of the plant. The discharge of the
sumps would be routed to the internal side of the intake screens for both units. An
oil/water detector would be installed in the sump to secure the discharge in the event of
an oil spill. The current oil/water separator will be removed from service. In the event of
an oil spill, the oily waste will be pumped to holding tanks to await disposal by
appropriate means. In a meeting with Tom Belnick of your office it was stated that an
ATC for the proposed modifications would not be needed.
A Notice of Intent (NOI) has been enclosed for the general permit NCG500000. CP&L
formerly requests that the individual NPDES permit (NC0027545) be rescinded after the
Marshall Plant is covered under the general permit.
Flow schematics of the existing and proposed piping flow are attached to the NOI.
Please contact Louise England at [phone] with any questions.
I certify, under penalty of law, that this document and all attachments were
prepared under my direction or supervision in accordance with a system
designed to assure that qualified personnel properly gather and evaluate the
information submitted. Based on my inquiry of the person or persons who
manage the system, or those persons directly responsible for gathering the
information, the information submitted is, to the best of my knowledge and belief,
true, accurate, and complete. I am aware that there are significant penalties

2
submitting false information, including the possibility of fines and imprisonment
for knowing violations.
Sincerely,
Barry
Manager — Hydroelectric Operations
Enclosures
c: Asheville Regional Office - DWQ
Brenda Brickhouse
Maxie Gardner
Dean Shults
Louise England

FOR AGENCY USE ONLY
ATA
NCDENR
NORTH GROW. DEPARTMENT or
ENVIRONMENT AND NANRAL RESOURCES
Division of Water Quality / Water Quality Section
National Pollutant Discharge Elimination System
NCG500000
Date Received
Year
Month
Day
Certificate of Coverage
NICIGI 1 1 1 1 1
check #
Amount
Permit Assigned to
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 Carolina Power & Light Company
Owner Name Barry Arney. Manager — Hydroelectric Operations
Street Address P.O. Box 1551. 411 Fayetteville Street Mall
City Raleigh State NC ZIP Code 27602
Telephone No. 919 546-3791 Fax: [phone]
* Address to which all permit correspondence will be mailed
2) Location of facility producing discharge:
Facility Name Marshall Hydroelectric Plant
Facility Contact Brenda Brickhouse
Street Address 40 N. Bear Creek Road
City Marshall State NC ZIP Code 28753
County Madison
Telephone No. 828 486-5965 ext. 2111 Fax: [phone]
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). 25/70 North. Left onto State Rd
1138 (Sweetwater Rd). Cross the river & turn left onto State Rd. 1114. Turn left at yellow gates.
(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 :
D New or Proposed
■ Modification
Please describe the modification: Rerouting of wastewater. removal of oiVwater separator (see
D Renewal attachment 2)
Please specify existing permit number and original issue date:
5) Does this facility have any other NPDES permits?
D No
® Yes
If yes, list the permit numbers for all current NPDES permits for this facility: The current NPDES
Permit is an individual permit (NC0027545).
6) What is the nature of the business applying for this permit? Hydroelectric power generation with
water turbines
Page 1 of 4
SWU-212-062199

NCG500000 N.O.I.
7) Description of Discharge:
a) Is the discharge directly to the receiving water? • 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 points (ditches, pipes, channels, etc. that convey wastewater from the
property): 1
c) What type of wastewater is discharged? Indicate which discharge points, if more than one.
❑ Non -contact cooling water Discharge point(s) #:
❑ Boiler Blowdown Discharge point(s) #:
❑ Cooling Tower Blowdown Discharge point(s) #:
❑ Condensate Discharge point(s) #:
M Other _ Discharge point(s) #: 1
(Please describe "Other") Turbine water. process water from sumps and drains
d) Volume of discharge per each discharge point (in GPD):
#1: 1,616,000.000 #2: #3: #4
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):
Turbine water and process water from sumps and drains
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.:
® 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.)? 0 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. 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
SWU-212-062199

NCG500000 N.O.I.
11) Discharge Frequency:
a) The discharge is: ® Continuous 0 Intermittent 0 Seasonal
i) If the discharge is intermittent, describe when the discharge will occur:
ii) If seasonal check the month(s) the discharge occurs: 0 Jan. 0 Feb. 0 Mar. 0 Apr.
0 May 0 Jun. 0 Jul. 0 Aug. 0 Sept. 0 Oct. 0 Nov. 0 Dec.
b) How many days per week is there a discharge? 7 days/week
c) Please check the days discharge occurs:
® Sat. ® Sun. ® Mon. I Tue. ® Wed. II Thu. ® Fri.
12) Pollutants:
Please list any known pollutants that are present in the discharge, per each separate discharge point (if
applicable, use separate sheet): See attachment 1
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). French Broad River
b) Stream Classification: C
14) Alternatives to Direct Discharge: NA
Address the feasibility of implementing each of the following non -discharge alternatives
a) Connection to a Regional Sewer Collection System
- b) Subsurface disposal (including nitrification field, infiltration gallery, injection wells, etc.)
c) Spray irrigation
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 retumed 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
SWU-212-062199

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: Barry L. Arney
Title: Manager — Hydroelectric Operations
(Signatures pph (Date Signed)
North Carolina General Statute 143-215.6 b (i) 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 $80.00 made payable to:
NCDENR
Mail three (3) copies of the entire package to:
Stormwater and General 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:
❑ Check for $80 made payable to NCDENR
❑ 3 copies of county map or USGS quad sheet with location of facility clearly marked on map
❑ 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.
❑ Thorough responses to items 1-7 on this application
❑ 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
SWU-212-062199

Carolina Power & Light Company
Marshall Hydroelectric Plant
Attachment 1
The only substances that the Marshall Plant may add to the discharge are (1) trace
amounts of metal from normal corrosion and erosion of the piping and equipment
through which the water passes and (2) traces of oil and grease from the equipment
that comes in contact with the water.
1

Forebay
Area 1
Oil/Water
Separator
Over/under
weir
Upper Packing
Leakoff
UNIT 1
Lower Bearing
Tailrace
Area
Draft Tube
Drain Pump
Draft Tube
Extensions
Inactive North
Filter
Tank Drain
Upper Packing
Leakoff
UNIT 2
Lower Bearing
Filter
Sump Pumps
♦ Switchyard Area
Catch
basin
Bearing Water Supply
Settling Tank
Penstock
B-Bearing
Water Pump
A -Bearing
Water Pump
Filter
Penstock
Emergency
Bearing Water
Reservoir Tank
Legend
H Valve normally closed
Attachment 2 Page 1 of 2
Carolina Power & Light Company
Marshall Hydroelectic Plant
NPDES Permit No. NC0027545
Madison County, NC
Existing Water Flow Schematic
Unit 1 Unit 2

Upper Packing
Leakoff
UNIT 1
Lower Bearing
♦
Tailrace 4—
Area
Draft Tube
Drain Pump
Forebay 1—
Area
4--
Over/under Catch
weir basin
Temporary Commercial
Waste Oil Disposal
Holding
11
Inactive North
Filter
Tank Drain
Draft Tube
Extensions Unit 1
Unit 2
Upper Packing
Leakoff
UNIT 2
Lower Bearing
Filter
F
Oil Detector/Alarm
Sump Pumps
Switchyard Area
Bearing Water Supply
Settling Tank
B-Bearing
Water Pump
Penstock
A -Bearing
Water Pump
1
94 1
Filter
Penstock
Emergency Bearing
Water Reservoir Tank
Legend
Val Valve normally open
NValve normally closed
Attachment 2 Page 2 of 2
Carolina Power & Light Company
Marshall Hydroelectic Plant
NPDES Permit No. NC0027545
Proposed Water Flow Schematic
NOTE: Green indicates modifications

Attachment 3
Carolina Power & Light Company
Marshall Hydroelectric Plant
NPDES Permit No. NC0027545
Site Plan