NC0076775_Permit (Modification)_20000530

NPDES DOCUIIIENT SCANNING COVER SHEET
NPDES Permit:
NC0076775
Falls Powerhouse
Document Type:
Permit Issuance
Wasteload Allocation
Authorization to Construct (AtC)
Permit Modification`s
Complete File - Historical
Engineering Alternatives (EAA)
Staff Report
Instream Assessment (67b)
Speculative Limits
Environmental Assessment (EA)
Document Date:
May 30, 2000
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State of North Carolina
Department of Environment
and Natural Resources
Division of Water Quality
James B. Hunt, Jr., Governor
Bill Holman, Secretary
Kerr T. Stevens, Director
May 30, 2000
Mr. William L. McCaskill
c/o Yadkin, Inc.
P.O. Box 576
Badin, North Carolina 28009
AVA
NCDENR
Subject: NPDES Permit Issuance
Permit No. NC0076775
Falls Powerhouse
Stanly County
Dear Mr. McCaskill:
The Division has modified the permit in accordance with the May 2, 2000, settlement meeting. The
changes include modification of the sampling frequency to require annual monitoring. As discussed at
the meeting samples may be obtained anytime during the calendar year, with the Discharge Monitoring
Report (DMR) due every year on January 30'h for the previous years monitoring.
Attached is the NPDES permit No NC0076775 issued May 30, 2000. 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.
Please take notice that this permit is not transferable. Part II, E.4. addresses the requirements to be
followed in case of change in ownership or control of this discharge. This permit does not affect the legal
requirement 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
government permit that may be required.
If you have any questions concerning this permit, please contact Mr. Michael Myers at telephone number
[phone], extension 508.
Sincerely,
Original Signed By
David A. Goodrich
Kerr T. Stevens
cc: Mooresville Regional Office - Water Quality Section
Central Files
NPDES Files
Point Source Compliance/Enforcement Unit
1617 Mail Service Center, Raleigh, North Carolina 27699-1617 Telephone [phone] FAX [phone]
An Equal Opportunity Affirmative Action Employer Internet: http://h2o.enr.state.nc.us/

Permit No. NC0076775
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,
Yadkin, Inc.
is hereby authorized to discharge wastewater from a facility located at
Falls Powerhouse
at the end of NCSR 1727
souteast of Badin, NC
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 July 1, 2000.
This permit and authorization to discharge shall expire at midnight on January 31, 2004.
Signed this day May 30, 2000.
Original Signed By
David A. Goodrich
Kerr T. Stevens, Director
Division of Water Quality
By Authority of the Environmental Management Commission

Permit No. NC0076775
SUPPLEMENT TO PERMIT COVER SHEET
Yadkin, Inc.
is hereby authorized to:
1. Continue to discharge once -through cooling water from outfalls 001, 002, 003, 004, and 005 and water
from a sump drain (Outfall 007) located at Falls Powerhouse, at the end of NCSR 1727, southeast of
Badin, 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 CA waters in the Yadkin -Pee Dee River Basin.

Facility Information
Latitude:
Longitude:
Quad#:
Stream class:
Receiving Stmanx
Permitted Flow:
35°23'44"
80°04'34"
F18NE
WS-kV and B
Yadkin Inc.
N/A
Sub -Basin:
03-07-08

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:
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
I
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 301h
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
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:
EFFLUENT CHARACTERISTICS
DISCHARGE LIMITATIONS
MONITORING REQUIREMENTS
Monthly Average
Weekly Average
Daily Maximum
Effluent Measurement
Frequency
Sample Type
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. 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.
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 301h
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.