NC0081957_Permit (Issuance)_20031230

NPDES DOCUMENT SCANNING COVER SHEET
NPDES Permit:
NC0081957
Narrows Powerhouse
Document Type:
ermit Issuance
Wasteload Allocation
Authorization to Construct (AtC)
Permit Modification
Complete File - Historical
Engineering Alternatives (EAA)
Inspection
Instream Assessment (67b)
Speculative Limits
Environmental Assessment (EA)
Document Date:
December 30, 2003
This document is printed on reuse paper - ignore arty
content on the relirerse side

SSA
NCDENR
Mr. Mark Gross
Alcoa Power Generating, Inc.
P.O. Box 576
Badin, North Carolina 28009
Dear Mr. Gross:
Michael F. Easley
Governor
William G. Ross, Jr., Secretary
North Carolina Department of Environment and Natural Resources
Alan W. Klimek, P.E., Director
Division of Water Quality
December 30, 2003
Subject: Issuance of NPDES Permit NC0081957
Narrows Powerhouse
Stanly County
Division personnel have reviewed and approved your application for renewal of the subject permit.
Accordingly, we are forwarding the attached NPDES discharge 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 U.S. Environmental Protection Agency dated May 9, 1994 (or as subsequently amended).
This final permit includes no major changes from the draft permit sent to you on November 5, 2003.
If any parts, measurement frequencies or sampling requirements contained in this permit are unacceptable to
you, you have the right to an adjudicatory hearing upon written request within thirty (30) days following receipt of
this letter. This request must be in the form of a written petition, conforming to Chapter 150B of the North Carolina
General Statutes, and filed with the Office of Administrative Hearings (6714 Mail Service Center, Raleigh, North
Carolina 27699-6714). Unless such demand is made, this decision shall be final and binding.
Please note that this permit is not transferable except after notice to the Division. The Division may require
modification or revocation and reissuance of the permit. 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, the 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 Dr. Sergei Chernikov at telephone number
[phone], extension 594.
cc: Central Files
Mooresville Regional Office/Water Quality Section
NPDES Unit
N. C. Division of Water Quality / NPDES Unit
1617 Mail Service Center, Raleigh, NC 27699-1617
Internet: h2o.enr.state.nc.us
Sincerely,
ORIGINAL SIGNED BY
SUSAN A. WILSON
Alan W. Klimek, P.E.
Phone: [phone]
fax: [phone]
DENR Customer Service Center 1 800 623-7748

Permit No. NC0081957
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES
DIVISION OF WATER QUALITY
PERMIT
TO DISCHARGE WASTEWATER UNDER THE
NATIONAL POLLUTANT DISCHARGE ELIMINATION 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,
Alcoa Power Generating, Inc.
is hereby authorized to discharge wastewater from a facility located at
Narrows Powerhouse
on NCSR 1704
Stanly County
to receiving waters designated as Yadkin River in the Yadkin -Pee Dee River Basin in accordance with
effluent limitations, monitoring requirements, and other conditions set forth in Parts I, II, III and IV
hereof.
This permit shall become effective February 1, 2004
This permit and authorization to discharge shall expire at midnight on January 31, 2009
Signed this day December 30, 2003
ORIGINAL SIGNED BY
SUSAN A. WILSON
Alan W. Klimek, PE, Director
Division of Water Quality
By Authority of the Environmental Management Commission

Permit No. NC0081957
SUPPLEMENT TO PERMIT COVER SHEET
Alcoa Power Generating, Inc.
is hereby authorized to:
1. Continue to discharge once -through cooling waters from outfalls 001, 002, 005, 006, and 007,
water from a sump drain (Outfall 003) located at Narrows Powerhouse, on NCSR 1704, Stanly County, and
2. Discharge from said treatment works at the location specified on the attached map into the
Yadkin River which is classified as class WS-IV and B waters in the Yadkin -Pee Dee River Basin.

Yadkin, Inc.
NCOO81957
Narrows Pawed

A (1). EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS - Final
Permit No. NC0081957
During the period beginning on the effective date of the permit and lasting until expiration, the Permittee is authorized to discharge once -through cooling water from outfall(s)
serial number 001, 002, 005, 006 and 007. Such discharges shall be limited and monitored by the Permittee as specified below:
EFFLUENT CHARACTERISTICS
DISCHARGE LIMITATIONS
MONITORING REQUIREMENTS
Monthly Average
Weekly Average
Daily Maximum
Effluent Measurement
Frequency
Sample Type
Sample
Location*
Flow (MGD)
Annual
Estimate
E
Temperature'
1
1
Annual
Grab
E
pH2
Annual
Grab
E
NOTES:
* Sample Location: E — Effluent or at the point closest to discharge where a representative sample of the discharge can feasibly be obtained.
1 The temperature of the effluent will be regulated so that the temperature of the receiving stream does not increase by more than 2.8 °C above the natural water
temperature. In no case should the receiving stream temperature exceed 32 °C due to the facility's operation. Temperature of the effluent may be obtained anywhere
downstream of the heat exchanger effluent that is representative of the discharge.
2 The pH of the effluent 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.
The Permittee shall obtain authorization from the Division prior to the use of any chemical additive in the discharge. The permittee shall notify the Director in
writing at least ninety (90) days prior to instituting the use of any additional additive in the discharge, which may be toxic to aquatic life (other than additives
previously approved by the division). Such notification shall include the completion of a Biocide Worksheet Form 101 (if applicable), a copy. of the MSDS for the
additive, and a map indicating the discharge point and receiving stream.
Monitoring results obtained during the calendar year shall be recorded and reported on a Discharge Monitoring Report (DMR) form and postmarked no later than January 30`h
following the completed reporting period. The first DMR is due January 30' 2001. Samples obtained for monitoring purposes may be collected anytime during the calendar
year.
There shall be no discharge of floating solids or visible foam (other than trace amounts) in the effluent, unless ambient river conditions prevent compliance.

A (2). EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS - Final
During the period beginning on the effective date of the permit and lasting until expiration, the Permittee is authorized to discharge from outfall(s) serial number 003 — Sump
Drain. Such discharges shall be limited and monitored by the Permittee as specified below:
Permit No. NC0081957
DISCHARGE LIMITATIONS
MONITORING
Effluent Measurement
Frequency
REQUIREMENTS
Sample Type
Sample
Location*
EFFLUENT CHARACTERISTICS
Monthly Average
Weekly Average
Daily Maximum
Flow
Annual
Estimate
E
Oil and Grease'
15 mg/I
20 mg/I
Annual
Grab
E
pH2 I
Annual
Grab
E
NOTES:
* Sample Locations: E — Effluent or at the point closest to discharge where a representative sample of the discharge can feasibly be obtained.
1 The tailrace shall be visually inspected for oil sheen attributed to facility operations on a weekly basis in conjunction with inspections of the floor sump and rope skimmer.
Confirmation that a visual inspection was conducted shall be recorded in the operating log for the facility and provided to the Division upon request.
2. The pH of the effluent shall not be less than 6.0 standard units or greater than 9.0 standard units, unless ambient river conditions prevent compliance with this range.
See Special Condition A(3) Penstock Sump Drains
Best Management Practices (BMPs) must be employed to ensure that excessive pollutants are not discharged to the surface water of the state. These practices should
include as a minimum, routine maintenance of the rope skimmer type oil/water separator and cleaning accumulated sediment in the bottom of the sump annually.
Chemical wheel pit cleaning is permitted on a monthly basis. When wheel pit cleaning 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 changesolvents, a written request should be made to the Division including the MSDS for the
proposed solvent.
Mechanical cleaning operations, which do not contribute any wastewater to the discharge are not limited by this permit. Non -discharging cleaning operations may be conducted
as often as necessary to ensure safety and proper facility operation.
The Permittee shall obtain authorization from the Division prior to the use of any chemical additive (i.e. biocides) in the discharge. The permittee shall notify the
Director in writing at least ninety (90) days prior to instituting the use of any additional additive in the discharge, which may be toxic to aquatic life (other than
additives previously approved by the division). Such notification shall include the completion of Biocide Worksheet Form 101 (if applicable), a copy of the MSDS for
the additive, and a map indicating the discharge point and receiving stream.
Monitoring results obtained during the calendar year shall be recorded and reported on a Discharge Monitoring Report (DMR) form and postmarked no later than January 3011'
following the completed reporting period. The first DMR is due January 30' 2001. Samples obtained for monitoring purposes may be collected anytime during the calendar
year.
There shall be no discharge of floating solids or visible foam (other than trace amounts) in the effluent, unless ambient river conditions prevent compliance.

State of North Carolina
Department of Environment
and Natural Resources
Division of Water Quality
Michael F. Easley, Governor
William G. Ross, Jr., Secretary
Alan W. Klimek, P.E., Director
MEMORANDUM
To:
From:
Subject:
November 7, 2003
Britt Setzer
NC DENR / DEH / Regional Engineer
Mooresville Regional Office
Sergei Chernikov
NPDES Unit
AVA
NCDENR
NORTH CAROLINA DEPARTMENT OF
ENVIRONMENT AND NATURAL RESOURCES
(r� [ VI
NOV 1 9 2003
Review of Draft NPDES Permit NC0081957
Stanly County
Iry
NOV 1 3 2003
.::ES
'FFilc E
WA ck QUALITY SECTION
Please indicate below your agency's position or viewpoint on the draft permit and return this form by
December 8, 2003. If you have any questions on the draft permit, please contact me at the telephone
number or e-mail address listed at the bottom of this page.
❑❑❑❑❑❑❑❑❑❑❑❑❑❑❑❑❑❑❑❑❑❑❑❑❑❑❑❑❑❑❑❑❑❑❑❑❑❑❑❑❑
RESPONSE: (Check one)
Concur with the issuance of this permit provided the facility is operated and maintained properly, the
stated effluent limits are met prior to discharge, and the discharge does not contravene the
designated water quality standards.
Concurs with issuance of the above permit, provided the following conditions are met:
Opposes the issuance of the above permit, based on reasons stated below, or attached:
1617 Mail Service Center, Raleigh, North Carolina 27699-1617 919 733-5083, extension 594 (fax) 919 733-0719
VISIT US ON THE INTERNET @ http://h2o.enr.state.nc.us/NPDES Sergei.Chernikov@ ncmail.net

DENR/DWQ
FACT SHEET FOR NPDES PERMIT DEVELOPMENT
NPDES No. NC0081957
Facility Information
Applicant/Facility Name:
Alcoa Power Generating, Inc. /Narrows Powerhouse
Applicant Address:
PO Box 576, Badin, NC 28009-0576
Facility Address:
On NCSR 1704
Permitted Flow
N/A — Daily Average — 1,903,280 gpd
Type of Waste:
Once -through cooling water.
Facility/Permit Status:
Renewal
County:
Stanly
Miscellaneous
Receiving Stream:
Yadkin River
Regional Office:
Mooresville
Stream Classification:
WS-IV & B CA
USGS Topo Quad:
F 18 NE
303(d) Listed?:
NO
Permit Writer:
Sergei Chernikov
Subbasin:
03-07-08
Date:
November, 2003
Drainage Area (mi2):
Summer 7Q10 (cfs)
Winter 7Q10 (cfs):
Average Flow (cfs):
IWC (%):
Primary SIC Code:
4911
SUMMARY
This facility maintains seven outfalls (001, 002, 003, 004, 005, 006, and 007). The source of wastewater
for outfalls 001,002, 005, 006 and 007 is once through cooling water, outfall 003 is a sump drain
collecting runoff. The old permit stipulates that outfalls 001, 002, 005, 006 and 007 be monitored (with
no limits) for flow, temperature and pH. Stormwater from the area beneath the penstocks is discharged
from outfall 004. Discharge monitoring reports have to be submitted yearly.
Discharge from outfall 004, which collects runoff from the site was found to contain elevated levels of
heavy metals during previous permit cycle. The sediment that had accumulated in the sump was
analyzed and found to contain PCBs in addition to heavy metals. Yadkin, Inc has implemented a
corrective action plan to address the issue of contamination. As a result of the plan, the level of
contamination has been drastically reduced and is no longer a concern. Following implementation of the
corrective action plan, Yadkin, Inc submitted a request for modification of the permit. DWQ approved
the request and removed the special condition for remediation and sampling of Penstock Sump Drains on
May 14, 2003. According to the permit modification, facility is not required to monitor outfall 004. The
stormwater will not be specifically permitted through an outfall, facility may continue operation as is.
The receiving stream (Yadkin River) is classified as WS-IV and B CA waters from Badin dam to a point
0.5 miles upstream of Falls dam. This reach is not listed on the 303(d) list as impaired water. According
to the March 2003 Yadkin -Pee Dee River Basinwide Water Quality management Plan this reach has been
classed as supporting its designated uses.
TOXICITY TESTING:
Current Requirement: N/A
Recommended Requirement: N/A
COMPLIANCE SUMMARY:
DMR reports and corrective action reports have been reviewed. With the available information it was
concluded that this facility has no compliance issues.
INSTREAM MONITORING:
This facility is not required to perform any instream monitoring.
Alcoa Power Gencralin2. Inc. — Nan-owc IIyclroelectric PowcrhouN_ fact Shen
NPDES Itcncw I
Pa.'c I

PROPOSED CHANGES:
PROPOSED SCHEDULE FOR PERMIT ISSUANCE:
Draft Permit to Public Notice: November 5, 2003.
Permit Scheduled to Issue: January 1, 2004.
STATE CONTACT:
If you have any questions on any of the above information or on the attached permit, please contact
Sergei Chernikov at [phone] ext. 594.
REGIONAL OFFICE COMMENT: This is a minor permit renewal therefore the regional office
comments will be solicited during the public comment period.
NPDES Recommendation by:
CianntiirP
Regional Office Comments
f'/3v/oy
T1atP
Regional Recommendation by:
Signature
Reviewed and accepted by:
Date
Regional Supervisor:
Signature
Date
NPDES Unit Supervisor:
Signature
Date
-\Ict a 1'o'ter (kncratin,i. Inc. - \arrov.s I I\.tIrir.•I trhow,. Fact Sheet
M1'1)1'S RCrrt:«;rl

PUBLIC NOTICE
STATE OF NORTH CAROLINA
, ENVIRONMENTAL MANAGEMENT
COMMISSION/NPOES UNIT
1817 MAIL SERVICE CENTER
RALEIGH, NC 27699-1617
NOTIFICATION OF INTENT TO ISSUE
WASTEWATER PERMIT
On the basis of thorough staff review and
application of NC General Statute 143.21.
Public law 92.500 and other lawlut
standards and regulations, the North
Carolina Environmental Management
Commission proposes to issue a National
Pollutant Discharge Elimination System
(NPDES) wastewater discharge permit no
the person(s) listed below effective 45
days from the publish date of this notice.
Written comments regarding the proposed
permit will be accepted until 30 days after
the publish date of this notice, All
comments are received prior to that date
are considered in the final determinations
regarding the proposed permit. The
Director of the NC Division or Water
Quality may decide to hold a public
meeting for the proposed permit should
the Division receive a significant degree of
pudic interest
Copies of the draft permit and other
supporting information on file used to
determine 009410ons present in the draft
permit are available upon request and
payment of the coals of reproduction. Mail
comments and/or requests for information
tome NC Division of Water Quality at the
above address or call Ms. Valery
Stephens at [phone], extension
620. Please include the NPDES permit
number (attached) in any communication.
Interested persons may also visit the
Division of Water Quality at 512 N.
Salisbury Street Raleigh. NC 27604-1148
between the hours or BOO a.m. and 6.00
p.m. to review Information on fie.
The City of Albemarle, NC has applied for
renewal of NPDES permit N00075701 for
its Tuckenown Water Treatment Plant in
Stanly County. The facility is permitted to
discharge treated filler backwash from one
mitas into the Yadkin River (Tuckertown
Reservoir) In the Yadkin Pee -Dee River
Basin. Currently, total residual chlorine is
water 00214 1om10d. This discharge may
affect the future a.4ocaticos in this portion
o1 the watershed.
The Alcoa Power Generating, Inc. (P.0
Box 578. 8340. NC 28009) has applied
for renewal of NPDES permit NC 0081957
for the Narrows Powerhouse a Stanly
County This permitted facility d0diarees
once -through cooling water and sump
drain water to the Yadkin River in the
Yadkin Pee -Dee Rover Basin. Currently oil
and grease are water quality limited. TNs
discharge may affect future allocations in
this portion of the Yadkin Pee -Dee River
Basin.
The Alcoa Power Generating, Inc. (P.O.
Box 578. Bailin, NC 28008) has applied
for renewal of NPDES permit NC 0081949
for the Tuckenown Powerhouse in Stanly
County. This permitted facility discharges
once -through coaling water and sump
drain wafer to the Yadkin River in the Yad-
kin Pea -Doe River Basin Currently oil and
grease are water quality limited. This dis-
charge may affect future allocations In this
portion of the Yadkin Pee•Oee River Ba-
ath.
Tne Alcoa Power Generating, Inc (P.O.
Box 578, Berlin, NC 28009) has applied
for renewal of NPDES permit NC0878775
for the Fans Powerhouse h Stanty Coun-
ty. This permitted facility discharges once -
through cooling water and sump drain wa-
ter to the Yadkin River in the Yadkin Pee-
060 River Basin. Cumen0y ell and grease
aro water quality limited. This discharge
may affect future allocation in this portion
of the Yadkin Pee -Dee Rivet Basin.
rIS C IEO tl E
NOV 1 2 2003
DENR-WATER QUALITY
POINT SOURCE BRANCH
r Advertising
Receipt
The Stanly News & Press
P.O. Box 488
Albemarle, NC 28002
Phone: [phone]
Fax: [phone]
ATTN: VALERY STEPHENS
NCDENR/DWO/NPDES
ATTN: VALERY STEPHENS
1617 MAIL SERVICE CENTER
RALEIGH, NC 27699-1617
Ad taker: A03 Salesperson:
Cust#: 02100838-000
Ad#: 02507002
Phone: [phone]
Date: 11/10/03
Classification: 355
Description
Start
Stop
Ins.
Cost/Day
Surcharges
Total
01 Stanly News & Press
Allldavit
Payment Reference:
11/11/03
11/11/03 1 136.76
PUBLIC NOTICE
STATE OF NORTH CAROLINA
ENVIRONMENTAL MANAGEMENT COMMISSION/NPDES UNIT
1617 MAIL SERVICE CENTER
RALEIGH, NC 27699-1617
NOTIFICATION OF INTENT TO ISSUE WASTEWATER PERMIT
On the basis of thorough staff review and application of NC General Statute 143.21, Public
law 92-500 and other lawful standards and regulations, the North Carolina
Environmental Management Commission proposes to Issue a National Pollutant Discharge
Elimination System (NPDES) wastewater discharge permit to the person(s) listed below
effective 45 days from the publish date of this notice.
Written comments regarding the proposed permit wit be accepted until 30 days after the
publish date of this notice. All comments are received prior to that date are considered
in the final determinations regarding the proposed permit. The Director of the NC
136.76
2.00
Total: 138.76
Tax: 0.00
Net: 138.76
Prepaid: 0.00
Total Due
138.76
NOV 1 2 2003

To: Permits and Engineering Unit
Water Quality Section
Attention: Charles Weaver
SOC Priority Project: No
Date: October 9, 2003
NPDES STAFF REPORT AND RECOMMENDATIONS
County: Stanly
NPDES Permit No.: NC0081957
MRO No.: 03-77 I
PART I- GENERAL INFORMATION L 1 OCT 1 3 2003
1. Facility and address: Narrows Powerhouse
Alcoa Power Generating, Inc.
Post Office Box 576
Badin, N.C. 28009
GE??R - WATER ov,LiTy
2. Date of investigation: May 22, 2003
3. Report prepared by: Michael L. Parker, Environmental Engineer II
4. Person contacted and telephone number: Mr. Larry McCaskill, [phone]
5. Directions to site: From the junction of SR 1704 and SR 1719 (Falls Road) in the Town of
Badin, travel northeast on SR 1704 to the end of the road. The Narrows Powerhouse is located
at the end of SR 1704.
6. Discharge point(s), list for all discharge points: -
Latitude: 35 ° 25' 09"
Longitude: 80° 05' 32"
Attach a USGS map extract and indicate treatment plant site and discharge point on map.
USGS Quad No.: F 18 NE
7. Size (land available for expansion and upgrading): There is little, if any, area available for
the construction of wastewater treatment facilities, if necessary.
8. Topography (relationship to flood plain included): The powerhouse is located on the main
segment of the Yadkin River; however, the hydroelectric generation facilities are not subject
to flooding.

Page Two
9. Location of nearest dwelling: The nearest dwelling is at least one mile from the powerhouse
site.
10. Receiving stream or affected surface waters: Yadkin River
a. Classification: WS-III and B
b. River basin and subbasin no.: Yadkin 03-07-08
c. Describe receiving stream features and pertinent downstream uses: The Yadkin River
is used for primary and secondary recreation and electricity generation. There are no
known water intakes for a distance of several miles below this powerhouse.
PART II - DESCRIPTION OF DISCHARGE AND TREATMENT WORKS
1. a. Volume of wastewater in MGD:
Outfalls 001, 005, 006, & 007:
Outfalls 002:
Outfall 003:
Outfall 004:
0.432 MGD*
0.0432 MGD
0.020160 MGD
0.0006 MGD
* Intermittent based on electricity needs and power production.
b. Types and quantities of wastewater:
Outfall 001, 005, 006, & 007:
Outfall 002:
Outfall 003
Outfall 004:
Unit's 1, 2, 3, & 4 generator cooling water.
Unit's 2 & 3 thrust bearing cooling water.
Turbine wheelpits and floor drains, inspection
sump, draft tube leakage, powerhouse sump.
Penstock leakage.
c. Prevalent toxic constituents in wastewater: None. There are no biocides added to the
cooling water at this facility.
2. Production rates (industrial discharges only) in Pounds: N/A
3. Description of industrial process (for industries only) and applicable CFR Part and Subpart:
N/A
4. Type of treatment (specify whether proposed or existing): There are no existing treatment
facilities for the proposed outfalls. For domestic wastewater disposal, employees must either
return to ALCOA's plant or use a portable toilet, which is provided.

Page Three
5. Sludge handling and disposal scheme: Sludge generation (outside of debris collected in some
of the floor drain sumps) is not expected from any outfall.
6. Treatment plant classification: N/A
7. SIC Code(s): 4911 Wastewater Code(s): 48 MTU Code(s): N/A
PART III - OTHER PERTINENT INFORMATION
1. Is this facility being constructed with Construction Grants Funds (municipals only)? Public
monies were not used in the construction of this facility.
2. Special monitoring requests: None at this time.
3. Additional effluent limits requests: None at this time.
4. Air Quality and/or Groundwater concerns or hazardous materials utilized at this facility that
may impact water quality, air quality or groundwater? No AQ or GW concerns nor are
hazardous materials utilized at this facility.
PART IV - EVALUATION AND RECOMMENDATIONS
The applicant, Alcoa Power Generation, Inc. (formally Yadkin, Inc.), a subsidiary of
ALCOA), operates a powerhouse (dam) on the Yadkin River known as Narrows Powerhouse, which
until about six months ago generated hydroelectric power that was used in ALCOA's aluminum
manufacturing process. Due to poor economic conditions and the depressed global aluminum market,
ALCOA has since curtailed all manufacturing operations, and the dams are now only used to produce
hydroelectric power that is sold to local electric utility companies. There have been no changes to this
facility with regards to the existing outfalls or the permit since the permit was last issued.
It should be noted that Alcoa has sealed off the area around the sump located along the east
foundation of the hydroelectric generation building. This sump receives stormwater that collects
along the building's foundation and pumps the water into the process water stream that feeds Narrows
Generator Unit No. 4, and ultimately outfall 004. In the past, stormwater used to come into contact
with the penstocks that serve the dam with water for electricity generation. Through the years, routine
maintenance of the penstocks included painting, which up until the past 2-3 decades involved the use
of lead -based paint. Over time, this paint flaked off, and was carried to the sumps during storm
events. In past analysis of this water, elevated levels of lead were found both in the sump water and
the sludges that had settled into the bottom of the sumps. In addition to the existence of lead, trace
amounts of PCBs and other constituents were also found in the sludges. Given the age of the dam,
many of the constituents found in the sump were used in paints and other products available in the
early 1900s. Alcoa eventually removed the sludges and water in the sump for disposal in a hazardous
waste landfill.

Page Four
Alcoa then hired a contractor that came in and sealed off the area around the penstocks, which
eliminated any potential for further SW contamination.
Pending a final review and approval by the NPDES Unit, it is recommended that the NPDES
permit be renewed as requested.
6eia e / p v—
Signature of Repo reparer Date
Water Quality ional Supervisor
h:Idsr\dsr031narrows.dsr
/0 9' 4..?
Date

FACT SHEET FOR EXPEDITED RENEWAL
Permit Number
N Goo 8/ 9S 7
Facility Name
Micro (A -I o w.cr 0
Reviewer
/4 DA'j
Basin/Sub-basin
OJo boa,
Receiving Stream
Ya A/eiHIs
the stream impaired (listed on 303(d))?
No
Is stream monitoring required?
No
Do they need NH3 limit(s)?
No
Do they need TRC limit(s)?
/10
Do they have whole -effluent toxicity testing?
ivo
Are there special conditions?
NQ
Any obvious compliance concerns?
No
Existing Expiration Date
/ /? / 6 f-
Proposed Expiration Date
//�//61
Miscellaneous Comments:
Circle one:
DO NOT EXPEDITE
If expedited, is this a simpler permit or a more difficult one?
ckc,(_,
/74

PERMIT APPLICATION - SHORT FORM C
\g or commercial facilities with a discharge <1 MGD (or WTPs)
. C. Department of Environment and Natural Resources
Division of Water
r, -PO �1617 Mail Service Cent r, Raleigh, NC 27699-1617
� PGA
) Mot1h Carolina NPDES Permit Number NC00 81957
Please print or type
bplicant and facility producing discharge
A. Name Alcoa Power Generating, Inc - Narrows Powerhouse
B. Mailing address of applicant:
Street address P.O. Box 576
City Badin
State N. C.
Telephone Number
Fax Number
e-mail address
C. Location of facility:
Contact Person Mark J. Gross
( 704) 422-5774
( 704 )422-5776
County Stanly
Zip Code 28009
[e-mail]
Street Narrows Dam Road
City Badin County Stanly
State N.C. Zip Code 28009
Telephone Number [phone]
2. Standard Industrial Classification (SIC) code(s): 4911
3. Number of employees: 4
4. Principal product(s) produced: Electricity
Principal raw material(s) consumed: N/A
5. Principal process(es): Hydroelectric Generation
6. Amount of principal product produced (or raw material consumed)
(List specific amounts consumed and/or units of production)
Product Produced or Raw Material Consumed
(AVERAGE)
Product Produced or Raw Material Consumed
(PEAK)
per Day
1390 MW
2592 MW
per Month
42,286 MW
78,840 MW
per Year
507,435 MW
946,080 MW
7. Check here if discharge occurs all year X or
Circle the month(s) in which discharge occurs:
January February March April
May June July August September October November December
Don.. 1 ..f O
Vn.rinn i 1 /9/1/1A

NPDES PERMIT APPLICATION - SHORT FORM C
For manufacturing or commercial facilities with a discharge <1 MGD (or WTPs)
Days per week discharge occurs: Seven (7)
NOTE: If the facility has separate discharge points (outfalls) or multiple industrial processes, include a schematic
diagram of wastewater flow at the facility.
8. Types of wastewater discharged to surface waters only (check as applicable).
Discharge per operating day
Flow
(GALLONS PER OPERATING DAY)
Volume treated before discharging
(PERCENT)
Sanitary - daily average
NA
Cooling water, etc. - daily average
1,903,280
0
Process water - daily average
20,160
100
Maximum per operating day for
total discharge (all types)
1,923,440
1
9. If any of the types of wastewater identified in item 8 (either treated or untreated) are discharged to places
other than surface waters, record the amount(s) discharged below:
A. Municipal sewer system NA qpd
B. Underground well NA gpd
C. Septic tank 300 qpd
D. Evaporation lagoon or pond NA gpd
E. Other, specify
pd
10. Number of separate discharge points: 7
11. Name of receiving stream(s): Yadkin River
12. Does your discharge contain or is it possible for your discharge to contain one or more of the following
substances added as a result of your operations, activities, or processes? Circle all that apply:
aluminum ammonia
copper cyanide
phenols selenium
beryllium cadmium
mercury nickel
chlorine (residual)
oil and grease
None of the above
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.
M rtC :. ( /?9
Printed name of ; erson S'g j ing
TitletO
(S v3
Signature of cant to
North Carolina Gene : ' atute 143-215.6B (i) provides that: Any person who knowingly makes any false statement representation, or certification in any application, record,
report, plan, or other ument 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
Dana of
1/orcina _11/9M1A

$.
NARROWS POWERHOUSE
NPDES PERMIT NO. NC 0004308
Narrows
Unit One
Scroll Case
Yadkin River
Outfall # 004
Penstock Leakage &
Strormwater 600 Gal/Day
Narrows
Unit Two
Scroll Case
Narrows
Unit Three
Scroll Case
1
Narrows
Unit Four
Scroll Case
Narrows
Unit Four
Scroll Case
Unit One
Units 1,2,3 & 4
Unit Two
Units 1,2,3,& 4
Generator
Thrust Bearing
Generator
Turbine Wheelpits,
Cooling Water
Cooling Water
Cooling Water
and floor drains
432,000 Gal/Day
172,400 Gal/Day
432,000 Gal/Day
2,880 Gal/Day
:1,
Unit Three
Unit Four
Unit Four
Generator
Generator
Generator
Cooling Water
Cooling Water
Discharge
432,000 Gal/Day
432,000 Gal/Day
Inspection
Sump
i
Powerhouse
Sum
Outfall # 001
Outfall # 002
Outfall # 006
Outfall # 003
Into Yadkin
Into Yadkin
Into Yadkin
Into Yadkin
River
River
River
River
Unit One Generator
Discharge/24 Hrs.
1,379,894,400 gals.
Unit Two Generator
Discharge/24 Hrs.
1,357,257,600 gals.
Outfall 003 consists of two separate discharges from a common sump
All Units Draft
Tube Leakage
17.280 Q{iI/Dav
Outfa 1 # 005
Outfall # 007
Outfa I #004
Into Yadkin
Into Yadkin
Into Yadkin
River
River
River
Unit Three Generator
Discharge/24 Hrs.
1,583,452,800 gals.
Unit Four Generator
Discharge/24 Hrs.
1,357,257,600 gals.

TerraServer Image Courtesy of the USGS
Page 1 of 1
Send To Printer Back To TerraServer Change to 11x17 Print Size Show Grid Lines Change to Landscape
MUSGS 14 km NE of Albemarle, North Carolina, United States 01 Jul 1974
}
J1
(62
lr
i
inamal-1I rU w_.i ■ _, / jif( G��
0'
�4Km
'2Mi
Image courtesy of the U.S. Geological Survey
© 2003 Microsoft Corporation. All rights reserved. Terms of Use
http://terraserver-usa.com/printimage. aspx?T=2& S=1 5&X=91&Y=612&Z=17&W=2&P... 07/22/2003