NC0076775_Permit (Modification)_20040123

NPDES DOCUMENT :SCANNING COVER :SHEET
NPDES Permit:
NC0076775
Falls Powerhouse
Document Type:
Permit Issuance
Wasteload Allocation
Authorization to Construct (AtC)
Permit Modification
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Complete File - Historical
Engineering Alternatives (EAA)
Staff Report
Instream Assessment (67b)
Speculative Limits
Environmental Assessment (EA)
Document Date:
January 23, 2004
Thus document is printed on reuse paper - ignore any
content on the reizerse side

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
January 23, 2004
Mr. Mark Gross
Alcoa Power Generating, Inc.
P.O. Box 576
Badin, North Carolina 28009
Dear 1vir. Gross:
AtrA
NCDENR
NORTH CAROLINA DEPARTMENT OF
ENVIRONMENT AND NATURAL RESOURCES
Subject: Modifications to NPDES Permits
Permits: NC0081957
NC0076775
NC0081949
NC0081931
Based on your comments dated December 17, 2003, the Division of Water Quality has modified the Alcoa Power
Generating, Inc. permits. Unfortunately, your comments were submitted after the 30-day comment period and we
were unable to make corrections in the final permits, so they are being made with this modification.
The reference to Special Condition A(3) Penstock Sump Drains has been removed from Permit NC0081957, and
the date for submitting the first DMR has been changed to January 30, 2005 in the following permits: NC0076775,
NC0081957, NC0081949, NC0081931.
Please find enclosed the revised permit pages. The revised pages should be inserted into your permit. The old pages
may then be discarded. All other terms and conditions contained in the original permits remain unchanged and in
full effect. This permit modification is issued under the requirements of North Carolina General Statutes 143-215.1
and the Memorandum of Agreement between North Carolina and the U.S. Environmental Protection Agency.
If any parts, measurement frequencies or sampling requirements contained in this permit modification 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.
If you have any questions concerning this permit modification, contact Sergei Chernikov at the telephone
number 919-733-5083, extension 594.
cc: NPDES Unit
Mooresville Regional Office / Water Quality Section
Central Files
Sincerely,
6.64,„
Alan W. Klimek, P.E.
1617 Mail Service Center, Raleigh, North Carolina 27699-1617 919 733-5083 (fax) 919 733-0719
An Equal Opportunity Affirmative Action Employer http:/1h2o.enr.state.nc.us/NPDES

A (1). EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS - Final
Permit No. NC0076775
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, 003, 004, and 005. Such discharges shall be limited and monitored by•the•Permittee as specified below:
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Location*
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Flow (MGD)•
Annual
Estimate
E
Temperature'
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1.
Annual
Grab
1
pH2
2
2
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 30th
following the completed reporting period. The first DMR is due January 30' 2005. 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
Permit No. NC0076775
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 007 — Sump
Drain. Such discharges shall be limited and monitored by the Permittee as specified below:
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EffluentMeasurement
Frequency :
ple Typ
Sample
Location
Flow
-
Annual
Estimate
E
Oil and Grease'
15 mg/1
20 mg/1
Annual
Grab
E
pH2
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. There is no limit for effluent pH, however annual monitoring shall be required. •
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 change solvents, 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 30th
following the completed reporting period. The first DMR is due January 30' 2005. 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.

The Stanly News & Press
P.O. Box 488
Albemarle NC 28002
[phone]
STARTDATE CLASS
02100838-000
NCDENR/DWQ/NPDES
1617 MAIL SERVICE CENTER
RALEIGH NC 27699-1617
AFFIDAVIT OF INSERTION
DATE: 11/14/03
DESCRIPTION DEC 1 1 213.20RDS its C1-13
1 /1 1 /2003 355 PUBLIC NOTICE STATE OF
NORTH CAROUNA, STANLY COUNTY
AFFIDAVIT OF PUBLICATION
Before the undersigned, a Notary Public of said
County and State, duly commissioned, qualified,
and authorized by law to administer oaths,
personally appeared: Peggy M. Dennis, who being
first duly sworn, deposes and says: that he is
Business Manager of a newspaper known as THE
STANLY NEWS AND PRESS, published, issued, and
entered as second class mail in the City of
Albemarle, in said County and State; that he is
authorized to make this affidavit and sworn
notice or other legal advertisement, a true copy of
which is attached hereto, was published in THE
STANLY NEWS AND PRESS on the dates specified on
the copy attached and that the said newspaper in
which such notice, paper, document or legal
advertisement was published was, at the time of
each and every such publication, a newspaper
meeting all of the requirements and qualifications of
Section 1-597 of the General Statures of North
Carolina and was a qualified newspaper within the
meaning of Section 1-597 of the General Statures
of North Carolina.
Pegg e nis
Business Manager
e
Sworn to and subscribed to before me this
14th day of November, 200
Odap
She Ty Nand; Notary Public
My commission expires April 01, 2006
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 revew 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
(NPOES) wastewater discharge permit to
the persons) listed below eeedive 45
days from the publish date of this nabce.
Written comments regarding the proposed
permit wdl be accepted until 30 bays after
the publish date of this notice. All
comments are received prior to ghat date
are considered in the final determinations
regarding the proposed permit. The
Director of the NC Division of Water
Quality may decide to hold a public
meeting for the piop0sed permit should
Me Owisgn redewe a significant degree of
public Merest
Copies of the draft permit and uthel
supporting information on file used R
determine Conditions present in the drat
permit are available upon request anc
payment of the costs of reproduction. Mai
comments and/or requests for informaaor
to the NC DMSIon of Water Quality at the
above address or call Ms. Valery
Stephens at [phone], extension
520. Please include the NPOES permil
number (attached) in any communication.
Interested persons may also wall the
Division of Water Quality at 512 N.
Salisbury Street. Raleigh. NC 27604-1148
between the hours of 8:00 a.m. and 5.00
pm. to review information on Ne.
The City of Albemarle, NC has applied for
renewal of NPOES permit NC0075701 for
Its Tockertown Water Treatment Plant in
Stanly County. The facility is permitted to
discharge healed filter backwash from one
oulfa0 into the Yadkin River (T0006 lows
Reservoir) in the Yadkin Pee -Dee River
Basin. Currently, total residual Chlorine is
water quality limited. This discharge may
affect the future allocations in this portion
of the watershed
The Alcoa Power Generating, Inc. (P.O.
Box 576. Badin, NC 28009) has applied
for renewal of NPDES permit NC 0081957
for the Narrows Powerhouse in Stanly
County. This permitted Malty discharges
once.through cooling water and sump
drain water to the Yadkin River in the
Yadkin Pee -Dee River Basin. Currently oil
and grease are water quality limited. This
discharge may arced Mute allocations in
this portion of the Yadkin Pee -Dee River
Basin
The Alcoa Power Generating. Inc. (P.O.
Boa 576, Bach. NC 28009) has applied
for renewal of NPDES permit NC 0081949
for the Tuckenown Powerhouse n Slant,/
County. This permmed facility discharges
once•Inrough cooling water and sump
drain water to the Yadkin Rwer in the Yad-
kin Pee -Dee River Basin. Currently oil and
grease are water quality limited. This dis-
charge may affect future allocations in this
portion of the Yadkin Pee -Dee River Ba-
sin
Trio Alcoa Power Generating. Inc (P.O.
Box 576. Bedm. NC 28009) has applied
. tar renewal of NPDES permit NC0076775
far the Falls Powerhouse in Slanly Coun-
ty. This permitted facility dlachargea once -
through cooling water and sump drain Wa•
ter to the Yadkin River in the Yadkin Pea -
Dee River Basin. Currently oil and grease
are water quality binned This discharge
may affect future allocation in this portion
of the Yadkin Pee -Dee River Basin
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