NC0081931_technical correction_20040123

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
A7rA
NCDENR
NORTH CAROLINA DEPARTMENT OF
ENVIRONMENT AND NATURAL RESOURCES
Subject: Modifications to NPDES Permits
Permits: NC0081957
NC0076775
NC0081949
NC0081931
Dear Mr. Gross:
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.
PIease 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,
7
lan 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://h2o.enr.state.nc.us/NPDES

A (1). EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS - FINAL
Permit No. NC0081931
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 and 003. Such discharges shall be limited and monitored by the Permittee as specified below:
EFFLUENT CHARACTERISTICS
Flow (MGD)
Temperature'
pH2
Monthly
Average
1
DISCHARGE LIMITATIONS MONITORING REQUIREMENTS
Weekly Average
Effluent Measurement
Daily Maximum Frequency
1
Sample
.Type •
Sample
Location*
NOTES:
*
Annual
Annual
Annual
Estimate
Sample Location: E — Effluent or at the point closest to discharge where a representative sample of the discharge can feasibly be obtained.
Grab
Grab
E
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 priorto 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.