NC0038377_Final Permit_20070410

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Mr Larry E. Hatcher, Plant Manager
Progress Energy Carolinas, Inc
Mayo Electric Generating Plant
10660 Boston Road
Roxboro, North Carolina 27574
Dear Mr Hatcher
Michael F Easley
Governor
William G Ross, Jr, Secretary
North Carolina Department of Environment and Natural Resources
April 10, 2007
Alan W Klimek, P E , Director
Division of Water Quality
Subject Issuance of NPDES Pernut
Permit NCO038377
Mayo Electric Generating Plant
Person 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 the following major changes from the draft permit sent to you on
January 31, 2007:
The compliance schedule of 24 months was added for the following parameters Be, Cd, Cr, F,
Pb, Mn, Ba, Tl, and V The issue of Chlorides limit will be addressed when Progress Energy
submits modeling information that was requested by the Division
The Division of Water Quality has reviewed your request to provide an additional 12 months to the
mercury limit compliance schedule This request cannot be granted since Mercury is a parameter of concern
and the FGD system is expected to contribute a significant amount of Mercury to the effluent
The Division has reviewed your request to reduce the monitoring frequency for all parameters for
Outfall 002 and Outfall 009 This request cannot be granted The proposed treatment system is innovative
and has an extremely hmited record for the proposed use Therefore, weekly monitoring is needed to closely
monitor the performance of the system In addition, the new information provided by Progress Energy
indicates that there is some uncertainty in the flow volume from the Ash pond, which makes the need for
collecting more data even more urgent. You may request reduction after 12 months of monitoring is
completed and if the system performs satisfactorily
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
N C Division of Water Quality / NPDES Unit Phone [phone]
1617 Mail Service Center, Raleigh, NC 27699-1617 fax [phone]
Internet h2o enr state nc us DENR Customer Service Center 1 800 623-7748

I
Letter to Mr Hatcher, page2
(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 Sergei Chernikov at telephone number [phone], extension 594.
Sincerely,
Alan W Klimek, P.E.
cc- Central Files
(NPDES-Files _ E
Raleigh Regional Office / Surface Water Protection Section
Aquatic Toxicology Unit
Mr Roosevelt Childress, EPA Region IV
Environmental Sciences Section, Biological Assessment Unit
Shari L Bryant, Piedmont Region Coordinator, North Carolina Wildlife Resources Commission

t -
Permit No NCO038377
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,
Carolina Power and Light d/b/a/ Progress Energy Carolinas, Inc.
is hereby authorized to discharge wastewater from a facility located at the
Mayo Steam Electric Generating Plant
off of US Highway 501
northeast of Roxboro
Person County
to receiving waters designated as the Mayo Reservoir in the Roanoke River Basin in accordance with
effluent limitations, monitoring requirements, and other conditions set forth in Parts I, II, III, and IV
hereof.
The permit shall become effective May 1, 2007.
This permit and the authorization to discharge shall expire at midnight on March 31, 2012
Signed this day April 10, 2007.
n /Alan Klimek, P E , Director
Division of Water Quality
By Authority of the Environmental Management Commission

Permit No. NCO038377
SUPPLEMENT TO PERMIT COVER SHEET
All previous NPDES Permits issued to this facility, whether for operation or discharge are hereby revoked
As of this permit issuance, any previously issued permit bearing this number is no longer effective.
Therefore, the exclusive authority to operate and discharge from this facility arises under the permit
conditions, requirements, terms, and provisions included herein
Carolina Power and Light d/b/a/ Progress Energy Carolinas, Inc.
is hereby authorized to:
1. Continue to operate the following systems located at Mayo Steam Electric
Generating Plant, off of US Highway 501, northeast of Roxboro, Person County:
• Cooling Tower System (Outfall 001). Less than once per year the cooling
towers and circulating water system are drained by gravity and discharged
directly to Mayo Reservoir.
Ash Pond Treatment System (Outfall 002). Outfall 002 discharges directly
to Mayo Reservoir. The ash pond receives ash transport water, coal pile
runoff, stormwater runoff, cooling tower blowdown, and various low volume
wastes such as boiler blowdown, oily waste treatment, wastes/backwash
from the water treatment processes, plant area wash down water, equipment
heat exchanger water, and treated domestic wastewater
Internal Outfall 008. Cooling tower blowdown is directly discharged to the
ash pond. Cooling tower blowdown is usually mixed with ash sluice water
prior to discharge to the ash pond. Cooling tower blowdown is indirectly
discharged to Mayo Reservoir via the ash pond treatment system (Outfall
002).
• Internal Outfall 009. Discharge from the FGD blowdown treatment
system.
• Stormwater Discharge System The facility is permitted to discharge
stormwater to Mayo Reservoir through the following outfalls -
Outfall 004 - Drainage from the outside storage area.
Outfall 005 - Drainage from the industrial area and the
oil/bottled gas storage area.
Outfalls 006a, 006b, 006c, 006d, 006e - Drainage from the
cooling tower(s) chemical feed building structure and the
cooling tower area
2. Discharge from said treatment works and/or outfalls at the locations specified on
the attached maps into Mayo Reservoir, which is classified as WS -V waters in the
Roanoke River Basin.

Permit NCO038377
A. (1 ) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS [001]
During the period beginning on the effective date of the permit and lasting until expiration, the
Permittee is authorized to discharge from Outfall 001 (Cooling Tower System) Monitoring is
required only during discharge events to the Mayo reservoir Such discharges shall be limited and
monitored by the Permittee as specified below
PARAMETER
LIMITS
MONITORING REQUIREMENTS
Monthly Daily
Average Maximum
Measurement Sample Type Sample
Frequency Locationl
Flow
Daily
Pump Logs or similar
readings
Effluent
Free Available Chlonne2
200 pg/L 500 Ng/L
Weekly
Grab
Effluent
Time of Chlorine Addition2
2 hours
Weekly
Logs
Total Chromium3
0 2 mg/L 0 2 mg/L
2 / Month
Grab
Effluent
Total Zinc3
10 mg/L 10 mg/L
2 / Month
Grab
Effluent
Priority Pollutants 3
No Detectable Amount
Annual
Grab
Effluent
H
> 6 0 and < 9 0 standard units
Weekly
Grab
Effluent
Notes:
1 Samples taken in compliance with the monitoring requirements listed above shall consist of cooling
tower effluent prior to its discharge to Mayo Reservoir
2 Monitoring is required only if chlorine -based compounds is added to the system Neither free
available chlorine nor total residual chlorine may be discharged from any single generating unit for
more than two hours per day, unless the Permittee demonstrates to the Division of Water Quality
that discharge for more than two hours is required for macroinvertebrate control The 500 pg/l
limitation is an instantaneous maximum and is to be measured during the chlorine release period
The 200 pg/1 limitation is an average during the chlorine release period Simultaneous multi -unit
chlorination is permitted
3 Limitations and monitoring requirements for the 126 Priority Pollutants (per 40 CFR Part 423,
Appendix A, exclusive of zinc and chromium) apply only if these substances are added by the
permittee for cooling tower maintenance Compliance with the limitations for the 126 priority
pollutants in 40 CFR 423 13 (d)(1) may be determined by engineering calculations which
demonstrate that the regulated pollutants are not detectable in the final discharge by the analytical
methods in 40 CFR Part 136 All primary industries are required to submit a priority pollutant
analysis in accordance with 40 CFR Part 122 with their application for permit renewal
The above listed effluent limitations shall be sampled prior to draining the cooling tower(s), at a
location prior to discharge to Mayo Reservoir
There shall be no discharge of polychlorinated biphenyl compounds such as those commonly used for
transformer fluid

Permit NCO038377
A. (2) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS [008]
During the period beginning on the effective date of the permit and lasting until expiration, the
Permittee is authorized to discharge from Outfall 008 (internal outfall, Cooling Tower System)
Such discharges shall be limited and monitored by the Permittee as specified below
PARAMETER
LIMITS
MONITORING REQUIREMENTS
Monthly Daily
Average Maximum
Measurement
Frequency
Sample Sample
Type Locationl
Flow
Daily
Pump Logs or Effluent
similar readings
Free Available Chlonne2
200 Ng/L 500 Ng/L
Weekly
Grab Effluent
Time of Chlorine Addition2
2 hours
Weekly
Logs
Total Chromium3
0 2 mg/L 0 2 mg/L
2 / Month
Grab Effluent
Total Zinc3
1 0 mg/L 1 0 mg/L
2 / Month
Grab Effluent
Priority Pollutants 3
No Detectable Amount
Annual
Grab Effluent
H
> 6 0 and < 9 0 standard units
Weekly
Grab Effluent
Notes -
1 . Samples taken in compliance with the monitoring requirements listed above shall consist of
cooling tower blowdown after mixing with the fly and bottom ash, but prior to discharging into
the ash pond
2 Monitoring is required only if chlorine -based compound is added to the system Neither free
available chlorine nor total residual chlorine may be discharged from any single generating unit
for more than two hours per day, unless the Permittee demonstrates to the Division of Water
Quality that discharge for more than two hours is required for macroinvertebrate control The
500 pg/l limitation is an instantaneous maximum and is to be measured during the chlorine
release period The 200 µg/l limitation is an average during the chlorine release period
Simultaneous multi -unit chlorination is permitted
3 Limitations and monitoring requirements for the 126 Priority Pollutants (per 40 CFR Part 423,
Appendix A, exclusive of zinc and chromium) apply only if these substances are added by the
permittee for cooling tower maintenance Compliance with the limitations for the 126 priority
pollutants in 40 CFR 423 13 (d)(1) may be determined by engineering calculations which
demonstrate that the regulated pollutants are not detectable in the final discharge by the
analytical methods in 40 CFR Part 136 All primary industries are required to submit a priority
pollutant analysis in accordance with 40 CFR Part 122 with their application for permit
renewal
This outfall is not authorized to discharge directly to the Mayo Reservoir

Permit NC0038377
A. (3) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS
[002 without FGD wastewater]
During the period beginning on the effective date of the permit and lasting until expiration, the
Permittee is authorized to discharge from Outfall 002 (Ash Pond Treatment System) Such
discharges shall be limited and monitored by the Permittee as specified below
PARAMETER
LIMITS
MONITORING REQUIREMENTS
Monthly Daily
Average Maximum
Measurement Sample Sample
Frequency Type Locationl
Flow
Weekly
Pump Logs or
similar readings
Effluent
Oil and Grease
15 0 m /L 20 0 m /L
Monthly
Grab
Effluent
Total Suspended Solids
30 0 m /L 100 0 m /L
Monthly
Grab
Effluent
Total Selenium2
3 8 lbs/day
2 / Month
Grab
Effluent
Acute Toxicit 3
Quarterly
Grab
Effluent
Total Arsenic4
Quarterly
Grab
Effluent
Total Copper
Quarterly
Grab
Effluent
Total Iron
Quarterly
Grab
Effluent
pH
> 6 0 and < 9 0 standard units
2 / Month
Grab
Effluent
Notes:
1 Samples taken in compliance with the monitoring requirements listed above shall be taken prior to
mixing with other waste streams
2 See A. (8).
3 Acute Toxicity (Fathead Minnow 24hr) No significant mortality at 90%, February, May, August, and
November, See A. (7).
4 See A. (13).
After the FGD treatment system is used to treat FGD wastewater, the effluent limits in Conditions A.
(4) and A (5) apply
There shall be no discharge of floating solids or visible foam in other than trace amounts outside an
area five(5) meters from the discharge pipe No chemical metal cleaning waste may be discharged to
the ash pond There shall be no discharge of polychlorinated biphenyl compounds such as those
commonly used for transformer fluid

Permit NCO038377
A. (4) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS
[002 with FGD wastewater]
During the period beginning upon commencement of the FGD treatment system to treat FGD
wastewater and lasting until expiration, the Permittee is authorized to discharge from Outfall 002
(Ash Pond Treatment System) Such discharges shall be limited and monitored by the Permittee as
specified below
PARAMETER
Monthly
Average
LIMITS
Weekly
Average
Daily
Maximum
MONITORING REQUIREMENTS
Measurement Sample Type Sample
Frequency Locationl
Flow
Weekly
Pump Logs
or similar readings
Effluent
Oil and Grease
15 0 m /L
20 0 m /L
Monthly
Grab
Effluent
Total Suspended Solids
30 0 m /L
100 0 m /L
Monthly
Grab
Effluent
Total Selenium
3 8 lbs/day
Weekly
Grab
Effluent
Acute Toxicit 2
Quarterly
Grab
Effluent
Total Mercury3,5
0 012 Ng/L
Weekly
Grab
Effluent
Total Arsenic4
Weekly
Grab
Effluent
Total Ber Ilium5
0 0068 Ng/L
Weekly
Grab
Effluent
Total Cadmium5
2 0 pg/L
Weekly
Grab
Effluent
Total Chlorides
230 m /L
Weekly
Grab
Effluent
Total Chromium5
50 0 pg/L
Weekly
Grab
Effluent
Total Copper
Weekly
Grab
Effluent
Total Fluoride5
18 mg/L
Weekly
Grab
Effluent
Total Lead5
25 0 Ng/L
33 8 Ng/L
Weekly
Grab
Effluent
Total Man anese5
200 0 Ng/L
Weekly
Grab
Effluent
Total Nickel
Weekly
Grab
Effluent
Total Silver
Weekly
Grab
Effluent
Total Zinc
Weekly
Grab
Effluent
Total Barium5
10 mg/L
Weekly
Grab
Effluent
Total Thallium5
0 35 Ng/L
Weekly
Grab
Effluent
Total Vanadium5
24 0 Ng/L
Weekly
Grab
Effluent
Total Iron
Quarterly
Grab
Effluent
H
> 6 0 and < 9 0 standard units
2 / Month
Grab
Effluent
Notes-
1 Samples taken in compliance with the monitoring requirements listed above shall be taken prior to
mixing with other waste streams
2 Acute Toxicity (Fathead Minnow 24 -hr) No significant mortality at 90%, February, May, August,
and November [see A. (7)]
3 The mercury limit will take effect one year after commencement of the FGD system to treat FGD
wastewater
4 See A. (13).
5. The limit becomes applicable 24 months after the commencement of the FGD system
After the FGD treatment system is used to treat FGD wastewater, the effluent limits in Conditions A.
(4) and A (5) apply
Progress Energy shall inform this office as well as the Raleigh Regional Office, via phone call and via
letter, as to when the FGD treatment system will be used to treat FGD wastewater
There shall be no discharge of floating solids or visible foam in other than trace amounts outside an
area five (5) meters from the discharge pipe No chemical metal cleaning waste may be discharged to
the ash pond There shall be no discharge of polychlorinated biphenyl compounds such as those
commonly used for transformer fluid

Permit NCO038377
A. (5) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS [009]
During the period beginning upon commencement of the FGD treatment system to treat FGD wastewater
and lasting until expiration, the Permittee is authorized to discharge from Internal Outfall 009
(treated FGD wet scrubber wastewater) Such discharges shall be limited and monitored by the
Permittee as specified below
PARAMETER
LIMITS MONITORING REQUIREMENTS
Monthly Daily Measurement Sample Sample
Average Maximum Frequency Type Locationl
Flow
Monthly
Instantaneous
E
Total Suspended Solids
Weekly
Grab
E
Total Mercury
Weekly
Grab
E
Total Selenium
Weekly
Grab
E
Total Arsenic
Weekly
Grab
E
Total Beryllium
Weekly
Grab
E
Total Cadmium
Weekly
Grab
E
Total Chlorides
Weekly
Grab
E
Total Chromium
Weekly
Grab
E
Total Copper
Weekly
Grab
E
Total Fluoride
Weekly
Grab
E
Total Lead
Weekly
Grab
E
Total Manganese
Weekly
Grab
E
Total Nickel
Weekly
Grab
E
Total Silver
Weekly
Grab
E
Total Barium
Weekly
Grab
E
Total Thallium
Weekly
Grab
E
Total Vanadium
Weekly
Grab
E
Total Zinc
Weekly
Grab
E
Notes:
1 E — Effluent from the FGD treatment system prior to discharge to the Ash Pond
A. (6) STORMWATER MONITORING REQUIREMENTS/ Qualitative Monitoring
Qualitative monitoring requires a qualitative inspection of each stormwater outfall, regardless of
representative outfall status, for the purpose of evaluating the effectiveness of the Stormwater
Pollution Prevention Plan and assessing new sources of stormwater pollution No analytical tests are
required Qualitative monitoring of stormwater outfalls does not need to be performed during a
representative storm event
Stormwater Discharge Characteristics
Measurement
Fre uenc 1
Sample Location
Color
Semi -Annual
Stormwater Discharge Outfall
Odor
Semi -Annual
Stormwater Discharge Outfall
Clarity
Semi -Annual
Stormwater Discharge Outfall
Floating Solids
Semi -Annual
Stormwater Discharge Outfall
Suspended Solids
Semi -Annual
Stormwater Discharge Outfall
Foam
Semi -Annual
Stormwater Discharge Outfall
Oil Sheen
Semi -Annual
Stormwater Discharge Outfall
Other obvious indicators of stormwater eollution
Semi -Annual
Stormwater Discharge Outfall
Notes:
1. Measurement Frequency Qualitative monitoring will be performed twice per year, once in the
spring (April - June) and once in the fall (September - November)

Permit NCO038377
A. (7) ACUTE TOXICITY PASS/FAIL PERMIT LIMIT (Quarterly)
Outfall 002 (Ash Pond)
The permittee shall conduct acute toxicity tests on a puarlerlu basis using protocols defined in the
North Carolina Procedure Document entitled "Pass/Fail Methodology For Determining Acute Toxicity
In A Single Effluent Concentration" (Revised -July, 1992 or subsequent versions) The monitoring
shall be performed as a Fathead Minnow (Pimephales promelas) 24 hour static test The effluent
concentration at which there may be at no time significant acute mortality is 90% (defined as
treatment two in the procedure document). Effluent samples for self-monitoring purposes must be
obtained during representative effluent discharge below all waste treatment The tests will be
performed during the months of February, May, August and November.
All toxicity testing results required as part of this permit condition will be entered on the Effluent
Discharge Monitoring Form (MR -1) for the month in which it was performed, using the parameter
code TGE6C. Additionally, DWQ Form AT -2 (original) is to be sent to the following address
Attention. North Carolina Division of Water Quality
Environmental Sciences Section
1621 Mail Service Center
Raleigh, North Carolina 27699-1621
Completed Aquatic Toxicity Test Forms shall be filed with the Environmental Sciences Branch no
later than 30 days after the end of the reporting period for which the report is made.
Test data shall be complete and accurate and include all supporting chemical/ physical
measurements performed in association with the toxicity tests, as well as all dose/response data
Total residual chlorine of the effluent toxicity sample must be measured and reported if chlorine is
employed for disinfection of the waste stream
Should there be no discharge of flow from the facility during a month in which toxicity monitoring is
required, the permittee will complete the information located at the top of the aquatic toxicity (AT)
test form indicating the facility name, permit number, pipe number, county, and the month/year of
the report with the notation of "No Flow" in the comment area of the form The report shall be
submitted to the Environmental Sciences Branch at the address cited above.
Should any single quarterly monitoring indicate a failure to meet specified limits, then monthly
monitoring will begin immediately until such time that a single test is passed. Upon passing, this
monthly test requirement will revert to quarterly in the months specified above.
Should the permittee fail to monitor during a month in which toxicity monitoring is required, then
monthly monitoring will begin immediately until such time that a single test is passed Upon passing,
this monthly test requirement will revert to quarterly in the months specified above
Should any test data from either these monitoring requirements or tests performed by the North
Carolina Division of Water Quality indicate potential impacts to the receiving stream, this permit may
be re -opened and modified to include alternate monitoring requirements or limits
NOTE- Failure to achieve test conditions as specified in the cited document, such as minimum
control organism survival and appropriate environmental controls, shall constitute an invalid test
and will require immediate follow-up testing to be completed no later than the last day of the month
following the month of the initial monitoring
A. (8) SELENIUM STUDY
The Permittee shall conduct biological and physical/ chemical studies on selenium and its effect in
the reservoir The results shall be submitted each year by May 1 for the prior calendar year. The
plan of study shall be submitted to the Director of the Division of Water Quality for approval

Permit NCO038377
A. (9) CRUTCHFIELD BRANCH
There shall be no direct discharge of wastewater from the ash pond to Crutchfield Branch There shall be no
violation of water quality standards in Crutchfield Branch due to any indirect discharge from the ash pond
The Permittee shall monitor the waters cf Crutchfield Branch, 100 yards downstream of the dike, once per
year by grab sample for the following arsenic, copper, and selenium
A. (10) DOMESTIC WASTEWATER TREATMENT PLANT
The domestic wastewater treatment plant shall be properly operated and maintained to ensure treatment of
domestic wastewater to secondary levels
A. (11) STORMWATER POLLUTION PREVENTION PLAN
The permittee shall develop a Stormwater Pollution Prevention Plan, herein after referred to as the
Plan The Plan shall be considered public information in accordance with Part Il, Section E 10 of
this permit The Plan shall include, at a minimum, the following items
a Site Plan- The site plan shall provide a description of the physical facility and the potential
pollutant sources which may be expected to contribute to contamination of regulated
stormwater discharges The site plan shall contain the following
(1) A general location map (USGS quadrangle map, or appropriately drafted equivalent
map), showing the facility's location in relation to transportation routes and surface
waters, and the name of the receiving water(s) to which the stormwater outfall(s)
discharges. If the discharge is to a municipal separate storm sewer system, the name
of the municipality and the ultimate receiving waters, and accurate latitude and
longitude of the point(s) of discharge must be shown
(2) A narrative description of storage practices, loading and unloading activities, outdoor
process areas, dust or particulate generating or control processes, and waste disposal
practices
(3) A site map (or series of maps) drawn to scale with the distance legend indicating
location of industrial activities (including storage of materials, disposal areas, process
areas, and loading and unloading areas), drainage structures, drainage areas for each
outfall and activities occurring in the drainage area, building locations and impervious
surfaces, the percentage of each drainage area that is impervious. For each outfall, a
narrative description of the potential pollutants which could be expected to be present
in the regulated stormwater discharge
(4) A list of significant spills or leaks of pollutants that have occurred at the facility during
the 3 previous years and any corrective actions taken to mitigate spill impacts
(5) Certification that the stormwater outfalls have been evaluated for the presence of non-
stormwater discharges. The certification statement will be signed in accordance with
the requirements found in Part II, Section B.11.
b. Stormwater Management Plan- The stormwater management plan shall contain a narrative
description of the materials management practices employed which control or minimize the
exposure of significant materials to stormwater, including structural and non-structural
measures. The stormwater management plan, at a minimum, shall incorporate the following -
(1) A study addressing the technical and economic feasibility of changing the methods of
operations and/or storage practices to eliminate or reduce exposure of materials and
processes to stormwater. Wherever practicable the permittee should consider covering
storage areas, material handling operations, manufacturing or fueling operations to

Permit NCO038377
prevent materials exposure to stormwater In areas where elimination of exposure is
not practicable, the stormwater management plan shall document the feasibility of
diverting the stormwater runoff away from areas of potential contamination
(2) A schedule to provide secondary containment for bulk storage of liquid materials,
storage of Section 313 of Title III of the Superfund Amendments and Reauthorization
Act (SARA) water priority chemicals, or storage of hazardous materials to prevent leaks
and spills from contaminating stormwater runoff If the secondary containment
devices are connected directly to stormwater conveyance systems, the connection shall
be controlled by manually activated valves or other similar devices [which shall be
secured with a locking mechanism] and any stormwater that accumulates in the
containment area shall be at a minimum visually observed prior to release of the
accumulated stormwater Accumulated stormwater shall be released if found to be
uncontaminated Records documenting the individual making the observation, the
description of the accumulated stormwater and the date and time of the release shall
be kept for a period of five years.
(3) A narrative description of Best Management Practices (BMPs) to be considered such
as, but not limited to, oil and grease separation, debris control, vegetative filter strips,
infiltration and stormwater detention or retention, where necessary The need for
structural BMPs shall be based on the assessment of potential of sources contributing
significant quantities of pollutants to stormwater discharges and data collected
through monitoring of stormwater discharges
(4) Inspection schedules of stormwater conveyances and controls and measures to be
taken to limit or prevent erosion associated with the stormwater systems
C. Spill Prevention and Response Plan. The Spill Prevention and Response Plan shall
incorporate a risk assessment of potential pollutant sources based on a materials inventory of
the facility. Facility personnel (or team) responsible for implementing the plan shall be
identified in the plan A responsible person shall be on-site at all times during facility
operations that have the potential to contaminate stormwater runoff through spills or
exposure of materials associated with the facility operations
d Preventative Maintenance and Good Housekeeping Program A preventative maintenance
program shall be developed The program shall document schedules of inspections and
maintenance activities of stormwater control systems, plant equipment and systems
Inspection of material handling areas and regular cleaning schedules of these areas shall be
incorporated into the program
e Training schedules shall be developed and training provided at a minimum on an annual
basis on proper spill response and cleanup procedures and preventative maintenance
activities for all personnel involved in any of the facility's operations that have the potential to
contaminate stormwater runoff Facility personnel (or team) responsible for implementing the
training shall be identified in the plan
f The Stormwater Pollution Prevention Plan
the overall coordination, development,
Responsibilities for all components of
assignments provided.
shall identify a specific position(s) responsible for
implementation, and revision to the Plan.
the Plan shall be documented and position(s)
g Plan Amendment The permittee shall amend the Plan whenever there is a change in design,
construction, operation, or maintenance which has a significant effect on the potential for the
discharge of pollutants via a point source to surface waters. The Stormwater Pollution
Prevention Plan shall be reviewed and updated on an annual basis.
The director may notify the permittee when the Plan does not meet one or more of the
minimum requirements of the permit Within 30 days of such notice, the permittee shall
submit a time schedule to the Director for modifying the Plan to meet minimum requirements
The permittee shall provide certification in writing (in accordance with Part III, Standard
Conditions, Section B 11 ) to the Director that the changes have been made

Permit NCO038377
h Facility Inspections. Inspections of the facility and all stormwater systems shall occur at a
minimum on a semiannual schedule, once in the fall (September - November) and once during
the spring (April - June) The inspection and any subsequent maintenance activities
performed shall be documented, recording date and time of inspection, individual(s) making
the inspection and a narrative description of the facility's stormwater control systems, plant
equipment and systems. Records of these inspections shall be incorporated into the
Stormwater Pollution Prevention Plan.
Visual monitoring as required in A(4) Stormwater Monitoring Requirements/ Qualitative
Monitoring shall be performed in addition to facility inspections
Implementation Implementation of the Plan shall include documentation of all monitoring,
measurements, inspections, maintenance activities and training provided to employees,
including the log of the sampling data. Activities taken to implement BMPs associated with
the industrial activities, including vehicle maintenance activities, must also be recorded All
required documentation shall be kept on-site for a period of five years and made available to
the Director or his authorized representative immediately upon request.
A. (12) STORMWATER MINIMUM MONITORING AND REPORTING REQUIREMENTS
Minimum monitoring and reporting requirements are as follows unless otherwise approved in writing
by the Director of the Division of Water Quality•
a If a facility has multiple discharge locations with substantially identical stormwater
discharges that are required to be sampled, the permittee may petition the Director for
representative outfall status If it is established that the stormwater discharges are
substantially identical and the permittee is granted representative outfall status, then
sampling requirements may be performed at a reduced number of outfalls.
b Visual monitoring for color, odor, solids, foam, outfall staining, visible sheens and dry weather
flow shall be performed at all stormwater discharge outfall locations All visual monitoring
shall be documented and records maintained with the Stormwater Pollution Prevention Plan
The initial visual monitoring event shall be performed during the Spring of 2006.
C. For purposes of the stormwater sampling required in this permit, all samples shall be
collected from a discharge resulting from a representative storm event (See definitions in Part
II, Section A). Failure to monitor storm events in accordance with the specified frequency
shall constitute a violation of this permit If the stormwater runoff is controlled by a
detention pond, the following sampling requirements shall apply
(1) If the detention pond detains the runoff generated by one inch of rainfall for 24 hours,
visual observations for color, foam, outfall staining, visible sheens and dry weather
flow are required, but analytical sampling shall not be required
(2) If the detention pond discharges only in response to a storm event exceeding a 25 -
year, 24-hour storm, the pond shall be considered a non -discharging stormwater
control system and not subject to NPDES requirements, unless the discharge causes a
violation of water quality standards
d. Samples analyzed in accordance with the terms of this permit shall be submitted on forms
approved by the Director no later than January 31 for the previous year in which sampling
was required to be performed
Analytical results from sampling during the final year of the permit term shall be submitted
with the permit renewal applicat-on.
This permit regulates stormwater discharges associated with industrial activity. Non-
stormwater discharges which shall be allowed in the stormwater conveyance system are:

Permit NCO038377
(1) All other discharges that are authorized by an NPDES permit
(2) Foundation drains, air -conditioner condensate without added chemicals, springs,
waterline and fire hydrant, water from footing drains, flows from riparian habits and
wetlands, fire -fighting training and fire system testing, wash down water without
added chemicals
(3) Discharges resulting from fire -fighting.
g If the storm event monitored and reported in accordance with this permit coincides with a
non-stormwater discharge, the permittee shall separately monitor and report all parameters
as required under the non-stormwater portion of this permit and provide this information
with the stormwater discharge monitoring report.
No analytical monitoring is required by the permit
A. (13) FISH TISSUE SAMPLING
Progress Energy shall conduct fish tissue sampling for Arsenic on an annual basis The fish tissue
sampling plan shall be approved by the Division's Environmental Sciences Section prior to
commencement of sampling

w Progress Ener
9 9Y
File 12520 B-1
Sergei Chernikov
NC Division of Water Quality
1617 Mail Service Center
Raleigh, NC 27699-1617
EC EHE
1
111q F E B 2 8 2007
DcNR - WATER QUALITY F E B 2 S 2007
°�'1NT CDUPCF V,,\rICH
Subject: Carolina Power & Light Company d/b/a Progress Energy Carolina, Inc.
Mavo Electric Generating Plant
NPDES Permit No NCO038377
Comments on Draft Permit
Dear Dr. Chernikov:
Enclosed are our comments on the subject draft NPDES permit. We appreciate the
opportunity to comment.
If you have any questions please contact Steve Cahoon at [phone].
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 for submitting false information,
including the possibility of fines and imprisonment for knowing violations
Sincerely,
�a
Larry E. Hatcher
Plant Manager
Mayo Electric Generating Plant
Progress Energy Carolinas, Inc
Mayo Steam Plant
10660 Boston Road
Roxboro, NC 27574

Mayo Electric Generating Plant
Draft NPDES Permit Comments
PART
Section A(4). — Effluent Limitations And Monitoring Requirements
Progress Energy (PE) requests that the monitoring frequency be reduced to bi-
weekly for all parameters with weekly monitoring required. Bi -weekly
monitoring will be sufficient to demonstrate the performance of treatment
facilities without being overly burdensome given the number of additional
parameters being analyzed with the addition of the FGD blowdown.
PE requests that the limits for Total Beryllium, Total Cadmium, Total Chloride,
Total Chromium, Total Fluoride, Total Lead, Total Manganese, Total Barium,
Total Thallium, and Total Vanadium become effective two years after
commencement of the FGD system to treat FGD wastewater.
• PE also requests an additional one year compliance period for mercury
Progress Energy understands that the DWQ believes these limitations fall under the
purview of 40 CFR § 122.47(a)(2), which states the following: The first NPDES permit
issued to a new source or a new discharger shall contain a schedule of compliance only
when necessary to allow a reasonable opportunity to attain compliance with requirements
issued or revised after commencement of construction but less than three years before
commencement of the relevant discharge.
Progress Energy believes that the above referenced CFR section does not apply to the
situation at hand and a schedule of compliance is allowable. The rationale for this belief
follows.
Section 122.47(A)(2) Is Not Applicable To Mayo Regardless Of New Source Or New
Discharger Classification
§ 122.47(a)(2) provides an allowance for the following situation -
An owner or operator is constructing an industrial facility that will generate a
wastewater discharge;

• He is issued his first [original] permit that contains applicable standards of
performance';
• He commences construction of the facility including wastewater treatment for
compliance with the standards of performance contained in the first permit,
The applicable industrial categorical standards of performance are "issued or
revised" within three years before the "commencement of the relevant
discharge."
Considering these events, the allowance in §122.47(a)(2) recognizes two issues, 1) an
owner or operator should not be penalized if, during construction of the industrial facility,
the minimum standards of performance are modified thereby presenting the owner with a
moving target for compliance, and 2) the owner cannot start and stop the construction of
his facility for a period of eight years for example, and still not be subject to performance
standards that have been revised in year five of his construction timeline. Taking this
concept a step further, once the discharge commences the facility becomes an existing
source and is subject to subsequent standards of performance and their associated
promulgated schedules of compliance.
This allowance under §122.47(a)(2) is applicable to an industrial facility in total that is
under construction for the first time (1 e. new source or new dischargers) and must
comply with categorical standards of performance. This is not the situation at the Mayo
facility. The Mayo facility has been in existence for over 20 years. § 122.47(a)(2) would
be applicable should Mayo install a totally new, independent generation unit and
associated structures at the site
Definition of New Source Is Not Applicable
The FGD wastewater stream is not anew source in regard to §122.47 In general a new
source is an industry that is subject to categorical standards of performance and that is
beginning its operation and associated discharges.2
Specifically a new source is defined in 40 CFR 122.2 as any building, structure, facility,
or installation from which there is or may be a "discharge of pollutants," the construction
of which commenced after promulgation of standards of performance under Section 306
of the CWA which are applicable to such source, or after proposal of standards of
performance in accordance with Section 306 of [the] CWA which are applicable to such
source, but only 1f the standards are promulgated in accordance with Section 306 within
120 days of their proposal.
1 Standards of Performance are the technology-based effluent limitations applicable to new sources under
§306 of the CWA. Refer to definition of New Source at 40 CFR§ 122 2
2 § 122.29 (b)(2) states A source meeting the requirements of paragraphs (b)(1) (i), (u), or (ill) of this
section is a new source only if a new source performance standard is independently applicable to it If there
is no such independently applicable standard, the source is a new discharger.

40 CFR § 122 29 serves to expand on the definition of new source and new dischargers.
§ 122 29(a)(5) defines facilities or equipment as " buildings, structures, process or
production equipment or machinery which form a permanent part of the new source and
which will be used in its operation, if these facilities or equipment are of such value as to
represent a substantial commitment to construct." Clearly the definition focuses on the
industrial process (i.e. generation of electricity using a steam cycle fueled by coal) rather
than any certain stream of wastewater (i.e FGD wastewater stream).
Furthermore, § 122.29(b) lists the criteria for new source determination If the activity
meets one of the following three criteria it can be considered a new source.
1) It is constructed at a site at which no other source is located; or
2) It totally replaces the process or production equipment that causes the discharge
of pollutants at an existing source; or
3) Its processes are substantially independent of an existing source at the same site.
Addressing each criterion respectively:
1) The Mayo facility is an existing source and therefore has a source located at the
same site as the FGD wastewater stream. Therefore the FGD wastewater stream
does not meet this criterion.
2) The FGD wastewater stream is dust that, a wastewater component of pollution
control at the existing process or production site. It certainly does not totally
replace the electricity generation process at the site. Therefore the FGD
wastewater stream does not meet this criterion
3) Again the FGD wastewater stream is dust that, a wastewater component of
pollution control at the existing process or production site. It is integrally tied
into the processes at the site and in not independent (it would not exist were it not
for the ongoing processes). Therefore the FGD wastewater stream does not meet
this criterion.
Finally at the NC Codified Regulation 15A 2B § 0407(b) it is stated that a modification to
an existing source will be considered a new source if the alteration is of such magnitude
to, in effect, create a new facility. Since the creation of the FGD wastewater stream and
treatment thereof certainly cannot be considered to "create a new facility," it should not
be considered a new source
Conclusively the FGD wastewater stream is not a new source by definition.
Definition of New Discharger
Referring back to § 122.29 (b)(2) if an industrial process meets the above criteria (which
the Mayo FGD wastewater stream does not) but does not have an applicable categorical
performance standard then it is a new discharger As outlined above the FGD wastewater
stream does not meet the applicable critena and cannot be a new discharger.

Schedule of Compliance
The situation with the new limitations for the Mayo FGD wastewater stream does not
constitute new source or new discharger issues but does involve the requirements of new
water quality based effluent limitations.
Both 40 CFR §122 47 and NC Codified Regulation 15A 2H §.0112(b)(2) allow a permit
to contain a schedule of compliance for achieving compliance with water quality based
limitations among other items. For water quality based limitations there are no statutory
deadlines like there are with technology based performance standards. Therefore a
reasonable amount of time can be allowed
Progress Energy requests the DWQ use its latitude and allow a 2 year compliance period
for the above referenced parameters. The compliance period is warranted because the
effluent limitations are relatively numerous and very stringent and the wastewater
treatment system being installed (Bioreactor) is a relatively new, innovative technology.
Because of the stringent limits that will be applied to the discharge in the future, and the
new technology used to treat to those low limits, Progress Energy believes it is
reasonable to be granted time to allow the wastewater treatment system to acclimate, to
evaluate the status of maintaining the lake as a water supply source which drives some of
the limits, and to evaluate cost effective compliance alternatives if necessary in the
future
Construction Sequence
Progress Energy received the final NPDES permit, which included the scrubber
modification in September of 2006 The company has been busily working on a
construction schedule for the FGD wastewater treatment system since receiving the final
permit. Progress Energy expects to submit an Authorization to Construct for the waste
water treatment system in March/Apnl of 2007, to begin its construction in the
August/September 2007 timeframe. The FGD waste water treatment system is scheduled
to be in service in the May 2009 timeframe to comply with the Clean Smokestacks Act.
Section A.(5) — Effluent Limitations and Monitoring Requirements
PE requests that the monitoring frequency be reduced to bi-weekly for all
parameters with weekly monitoring required. Bi -weekly monitoring will be
sufficient to demonstrate the performance of treatment facilities without being
overly burdensome given the number of additional parameters being analyzed
with the addition of the FGD blowdown.

January 31, 2007
MEMORANDUM
To: Michael Douglass, Regional Engineer
NC DENR / DEH / Public Water Supply Section
Raleigh Regional Office
From. Sergei Cherenkov, Environmental Engineer II, NPDES-West,
Division of Water Quality (fax -919-733-0719)
Subject Review of the discharge locations for the following
Mayo Steam Electric Generating Plant
NC0038377
Person County
Please indicate below by March 1, 2007 your agency's position or viewpoint on the facility
listed above We cannot issue the permit without your concurrence. Please return this form
at your earliest convenience.
RESPONSE
[i This agency has reviewed the draft permit and determined that the proposed
discharge will not be sufficiently close to any existing or known proposed
public water supply intake so as to create an adverse effect on water quality.
We 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
Signed ' 1 1,- - Date- 2-111C
cc: file

STATE OF NORTH CAROLINA,
PERSON COUNTY
PRINTER'S AFFIDAVIT
Vickie F Carver, being duly sworn,
PUBLIC NOTICE
deposes and says That she is Office Manager of
STATE OF NORTH CAROLINA
ENVIRONMENTAL MANAGEMENT
COMMISSIONMPDES UNIT
The Courier -Times, with Its principle P lace of business
1617 MAIL SERVICE CENTER
RALEIGH, NC 27699.1617
' NOTIFICATION OF INTENT
TO ISSUE A NPDES
located in the city of Roxboro, County of Person, State
WASTEWATER PERMIT
On the basis of thorough staff
review and application of NC General
of North Carolina, that the foregoing or attached
Statute 143.21, Publiclaw92-500 and
otherlawful standards and regulations,
the North Carolina Environmental
newspaper notice was published in The Courier -Times,
Management Commission proposes
to issue a National Pollutant Discharge
Elimination , System (NPDES)
once a week for I successive weeks, beginning with
wastewater- discharge permit to the
person(s) listed below effective 45
�( d '^
y-� L C)�
days from the_ publish dale of this
notice
its issue of l ay of 20
Progress Energy; 10660 Boston
4h da of
and ending with its issue of y
Road, Roxboro,NC27574hasapplied
for renewal of as NPDES discharge
permit for Mayo Electric Generating
p� `7
►J t� 'L 2tT that The Courter -Times, is
Plant (number NC003&377)
discharging to the Mayo Reservoir in
the Roanoke River Basin This facility
operates twoouffalls,001(recirculated
the sole owner and publisher of said newspaper,
Pash
coolinguicer),0 ter, cooling lower
sluice water, cooling lower
blowdown, coal pile runoff, FGD
The Courier- T a
blowdown, etc ) Currently total
selenium, oil and grease, and TSS
11
are water quaility limited This
!
discharge may affect future discharges
�(Affiant)
in this portion of the Roanoke River
Basin
Written comments regarding the
proposed permit will be accepted until
Sworn to and subscribed before me,
30 days after the publish date of this
notice All comments received prior to
�4
that date are considered in the final
ons regarding the
t the< da��
y of�20QI
proposed permit The iirectr of the
NC Division of Water Quality may
Public)
decide to hold a public meeting for the
should the Division
(1Votary
proposed permit
cc,, 7
receive a significant degree of public
interest
My commission expires theq day of�l 20 ` " ►
`�
Copies of the draft permit and
other supporting information on file
used to determine conditions present
tom_,
in the draft permit are available upon
request and payment of the costs of
i J
(Publication Fee $)
reproduction Mad comments and/or
requests for information to the NC
Division of Water Quality at the above
(Notarial Seal)
address or call the Point Source
Branch at [phone], extension
520or363 Please include the NPDES
permit number 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 of 8 00 a m
and 5 00 p m to review information
on file
Feb 7

DEN'R/DWQ
FACT SHEET FOR, NPDES PE'RMI,T DEVELOPMENT
NPDES No, NC0038377, Progress Energy Carolinas, Inc
Mayo Steam Electric Generating Plant
SUMMARY
The Mayo Electric Generating Plant is a coal-fired electric generating plant with one
uzzit rated at a maximum dependable capacity of 745 mw- Water for plant uses is
withdrawn from the Mayo Reservoir as required to make up evaporative losses from
the cooling tower, boiler water and drinking water needs This facility is subject to
EPA effluent guideline limits per 40 CFR 423- Steam Electric Power Generating Point
Source Category. The facility is not subject to the 316(b) Phase II regulations since it
is a closed cycle cooling system and has a design flow of less than 50 MGD
The permit was modified in 2006 to include blowdown from Flue Gas Desulfurization
(FGD) system The FGD is essentially a scrubber system to remove SOx by mixing
flue gas with a limestone slurry Outfall 009 was established to monitor the FGD
blowdown.
The facility operates the following outfalls'
• Outfall 001 - Cooling tower system, This system is drained for ;maintenance
approx,imately once a year to the reservoir The discharge is monitored and
reported on the DMRs
• Outfall 002 - Ash pond treatment system (including low volume waste, ash
sluice water, cooling tower blowdown, coal pile runoff, FGD blowdown, etc)
Facility Information
Applicant/ Facility Name
Progress `Energy Carolinas/ Mayo ,Steam Electric Generating Plant
Applicant Address
10660 Boston Road, Roxboro, NC 27573
Facility Address
(same)
Permitted Flow
Not limited
Type of Waste.
99 8 % Industrial,, 0 2% - domestic
Facility/Permit Status
Existing
County
Person
Miscellaneous
Receiving Stream
Mao Reservoir
Regional Office
RRO
Stream Classification
CJS -V
Quad
A2.3SW
303(d) Listed
No
Permit Writer
Sergei Chernikov
Subbaszn
030205
'Roanoke
Date
January 25, 2,007
Drainage Area mit
Lake
` -
V s
6
Summer 7Q 10 cfs
30Q2 (cfs)
Average Flow cfs
IWC (%)
100610
(assumed, no
modeling info
Primary SIC Code
SUMMARY
The Mayo Electric Generating Plant is a coal-fired electric generating plant with one
uzzit rated at a maximum dependable capacity of 745 mw- Water for plant uses is
withdrawn from the Mayo Reservoir as required to make up evaporative losses from
the cooling tower, boiler water and drinking water needs This facility is subject to
EPA effluent guideline limits per 40 CFR 423- Steam Electric Power Generating Point
Source Category. The facility is not subject to the 316(b) Phase II regulations since it
is a closed cycle cooling system and has a design flow of less than 50 MGD
The permit was modified in 2006 to include blowdown from Flue Gas Desulfurization
(FGD) system The FGD is essentially a scrubber system to remove SOx by mixing
flue gas with a limestone slurry Outfall 009 was established to monitor the FGD
blowdown.
The facility operates the following outfalls'
• Outfall 001 - Cooling tower system, This system is drained for ;maintenance
approx,imately once a year to the reservoir The discharge is monitored and
reported on the DMRs
• Outfall 002 - Ash pond treatment system (including low volume waste, ash
sluice water, cooling tower blowdown, coal pile runoff, FGD blowdown, etc)

NPDES PERMIT FACT SHEET
Page 2
Progress- Mayo
NPDES No. NCO038377
Cooling tower blowdown is usually mixed with bottom and fly ash prior to
discharging into the ash pond.
Outfall 008 (internal) - Cooling tower blowdown is directly discharged to the
ash pond. Cooling tower blowdown is usually mixed with ash sluice water prior
to discharge to the ash pond. Cooling tower blowdown is indirectly discharged
to Mayo Reservoir via the ash pond treatment system (Outfall 002).
Outfall 009 (internal) - FGD blowdown.
Outfalls 004, 005, and 006a: b, c, d, e - stormwater outfalls.
TOXICITY TESTING:
Current Requirement: Acute P/F at 90%, February, May, August, November.
Proposed Requirement: Acute P/ F at 90%, February, May, August, November.
The facility has passed all chronic toxicity tests during the previous 4.5 years.
COMPLIANCE SUMMARY: BASED ON THE PREVIOUS 5 YEARS
There are no outstanding and/or chronic compliance problems related to the NPDES
permit. A compliance evaluation inspection conducted on 03/31/05 found that
facility is in compliance. The only Notice of Violation that was issued during previous
5 years was for TRC (10/ 13/2003). Letter from Environmental Sciences Branch (ESS)
that was issued (05/09/2005) concurred with the latest report from Progress that
chemical and biological characteristics of Mayo reservoir are similar to prior years.
Letter from ESS (05/30/2006) concurred with the 2005 Environmental Monitoring
Report prepared by Progress Ene_ gy that operational effects of the plant (on Mayo
Reservoir) continue to be minimal.
PROPOSED CHANGES
No changes are proposed.
PROPOSED SCHEDULE FOR PERMIT ISSUANCE
Draft Permit to Public Notice: 1/31/07 (est.)
Permit Scheduled to Issue: 3/30/07 (est.)
STATE CONTACT
If you have any questions on any of the above information or on the attached permit,
please contact Sergei Chernikov at [phone], extension 594.
CHANGES IN THE FINAL PERMIT:
The compliance schedule of 24 months was added for the following parameters: Be, Cd, Cr,
F, Pb, Mn, Ba, T1, Hg and V.

REASONABLE POTENTIAL ANALYSIS
Mayo Steam Electric Plant
< NCO038377
Time Period 2001-2005
Qw (MGD)
7.3
7Q10S (cfs)
0
7Q10W (cfs)
0
30Q2 (cfs)
0
Avg Stream Flow, QA (cfs)
0
Rec'uing Stream Mayo reservoir
WWl-P Class < WWrP Class >
IWC (%) @ 7Q10S
100
@ 7Q10W
100
@ 30Q2
100
@ QA
100
Stream Class C
PQL
Outfall 001
Ow = 7.3 MGD
*Legend
C = Carcinogenic
NC = Non -carcinogenic
A =Aesthetic
"Freshwater Discharge
38377 -RPA -2005, rpa
1/25/2007
STANDARDS &
PARAMETER
TYPE
CRITERIA (2)
PQL
Units
REASONABLE POTENTIAL RESULTS
RECOMMENDED ACTION
(1)
NCWQS/ %FAV/
Chronic Acute
n #Det MaxPredCw AllowahleCw
Arsenic
NC
50
ug/L
17 17
5346
Acute N/A
�� fr,
................
_/ t
Chronic 50
Acute 56
, a
L�- �j
Selenium
NC
50 56
ug/L
37 37
152
/ (J
_ _ _
Chronic 50
C" /r
*Legend
C = Carcinogenic
NC = Non -carcinogenic
A =Aesthetic
"Freshwater Discharge
38377 -RPA -2005, rpa
1/25/2007

REASONABLE POTENTIAL ANALYSIS
38377 -RPA -2005, data
- 1 1/25/2007
Arsenic
Date
Data
BDL=1/2DL
Results
1
640
640
Std Dev
414365
2
193 0
193 0
Mean
591176
3
1050
1050
C V
07009
4
680
680
n
17
5
80
80
6
r 13 0'
130
Mult Factor =
27700
7
350
350
Max Value
193 0 ug/L
8
310
310
Max Pred Cw
534 6 ug/L
9
420
420
10
600
600
11
660
660
12
450
450
13
450
450
14
560
560
15
620
620
16
410
410
17
710
710
18'
19
20
21
22
(
23
24
25
LLi4'
26
27
28
29, ,
30
31
32
33
34,
35
36
37
38
,
�
39 '
40
41
42
43
44
45
46
47`
48,
49,
51
52
53'
54,
55
56
57 ,
58
59,
60
199
200
38377 -RPA -2005, data
- 1 1/25/2007

g'n�' Progress Energy
9Y
File: 12520 B-1
Mr. Gil Vmzam, PE
North Carolina Department of Environment and Natural Resources
Division of Water Quality
1617 Mail Service Center
Raleigh, NC 27699-1617
Subject: CP&L d/b/a Progress Energy Carolinas, Inc.
Mayo Electric Generating Plant
NPDES Permit No. NCO038377
Re -issuance Application
Dear Mr. Vmzani:
SEP 2 5 2006
flD'ECEoVE
S E P 8 20V UO 6W
DENR - WATER QUALITY
SURFACE WATER PROTECTION SECTION
The current NPDES permit for Mayo Electric Generating Plant located in Person County expires
on March 31, 2007. Progress Energy hereby requests that the NPDES permit for the facility be
reissued. Enclosed are EPA Application Form 1 — General Information, EPA Application Form
2C — Wastewater Discharge Information, and EPA Application Form 2F — Stormwater
Discharges Associated with Industrial Activity, all in triplicate.
If there are any questions regarding the enclosed information, please contact Steve Cahoon at
[phone].
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 qual f ed 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 for submitting false information,
including the possibility offines and imprisonment for knowing violations
Sincerely,
#
La E. Hatcher- Manager
Mayo Electric Generating Plant
Attachments
Progress Energy Carolinas, Inc
Mayo Steam Plant
10660 Boston Road
Roxboro, NC 27574

0 1 2 3
I i
Kilometers
0 1
2
Out
OC
r
r
r
r
' Ash
r
r Pond
i
i
' C
r — PIS
r Si
r
r
Outfall
001
r
r
r
i SFZ1512 , .
t'
i
i
i
i
i
r
i
'r
r
.�
Public
E— boat
7 ramp r
r
r
i
i
r
i
r
Enclosure 1 – Item XI
Carolina Power and Light Company
Mayo Electric Generating Plant
Person County, N C
Page 2 of 2 September 2006

16 Ouffail 002
11 Cooling Towers 10 Mayo Reservoir
Outfall 001
14 1
14
2 IF
Misc Equipment Heat
— Intake Structun
Exchangers
18 Alternate
13
Outfall 008
Condensers Fire
Ash Sluice Protection
Water
12
Stormwater
3
—� Raw Water
Treatment
5 6
4
Potable &
Sanitary
Water Storage I I Sewage
treatment
Boder & Turbine Condensate Ion Exchange Oily Waste
Storage Treatment
9
7
Ash Pond
19 15 17
Secondary Containment
FGD Blowdown Coal Pile For anhydrous ammonia
Runoff tanks
Misc low
Volume

Progress Energy Carolinas, Inc.
Mayo Electric Generating Plant
National Pollutant Discharge Elimination System Permit Number NC0038377
Attachment 2
Form 2C - Item II -A Flows, Sources of Pollution, and Treatment Technologies
Stream
Estimated Average Flow
Comments
1
14 MGD
Make up water from Mayo Reservoir
2
13 7 MGD
Cooling Tower make up Maximum
rate is 23 7 MGD
3
0 36 MGD
Raw Water treatment
4
0 002 MGD
Sewage treatment plant
5
0 00175 MGD
Raw water treatment backwash
6
0 36 MGD
Treated water to water storage
7
300 GPM (Max rate)
Oily waste (infrequent) to ash pond
8
1 5 MGD
Low volume waste to ash pond
9
0 05 MGD at start up
Boder blowdown to ash pond
10
2 MG/event 1/yr.
Cooling Tower basin drain to Mayo
Reservoir
11
9 MGD
Evaporation from Cooling Tower
12
5 MGD
Ash Transport
13
Variable as needed
(blowdown)
Intermittent blowdown of circulating
water from heat exchangers
14
8 5 MGD (recirculating flow)
Heat exchanger (primary route)
15
0 0135 MGD (annual daily
average)
Coal pile Runoff
16
7 3 MGD
Ash Pond discharge to Mayo
Reservoir
17
Variable as needed
Secondary containment for anhydrous
ammonia tanks
18
2 1 MGD During Cooling
Tower out of service
Heat exchanger (secondary route)
19
0 253 MGD
FGD Blowdown

Progress Energy Carolinas, Inc.
Mayo Electric Generating Plant
National Pollutant Discharge Elimination System,Permit Number NCO038377
Attachment 3
Form 2C - Item II -B Flows, Sources of Pollution, and Treatment Technologies
The Mayo Electric Generating Plant is a coal-fired electric generating plant with one unit rated at a
maximum dependable capacity of 745 mw. The plant is located in Person County, North Carolina and
uses No 2 fuel oil for start up and stabilization of the boder flame Water is withdrawn from the Mayo
Reservoir as required to make up evaporative losses from the cooling tower, boiler water and drinking
water needs Makeup pumping rates from the reservoir are highly variable depending upon natural
weather conditions, generation load, plant operations, and evaporative loss
Chemical constituents contained in the discharges from this facility will, in part, be representative of the
naturally occurring chemical quality of the intake water The discharges will also have chemical
constituents of such quality and quantity associated with similar discharges for fossil generating facilities
of this size, type, and in this geographical location Either all or part of the elements enumerated in the
Periodic Table, either singularly or in any combination, may from time to time be contained in this
discharge. More detailed descriptions of the individual discharges described below.
OUTFALL 001 - COOLING TOWER SYSTEM
Approximately once per year the cooling tower basin and circulating water system is drained by gravity
(the majority of the water drains to the ash pond) approximately 2 MG is drained to the reservoir to
dewater the system for maintenance That discharge is monitored and reported to the state through the
monthly Discharge Monitoring Report (DMR).
OUTFALL 002 — ASH POND TREATMENT SYSTEM
The ash pond receives ash transport water, coal pile runoff, storm water, cooling tower blowdown,
and various low volume wastes such as boder blowdown, oily waste treatment, wastes/backwash
water from water treatment processes, plant area wash down water, and equipment heat
exchanger water The sewage treatment plant also discharges to the ash pond The ash pond
provides treatment by sedimentation, oxidation, neutralization, equalization, and adsorption A
standpipe allows for overflow release to a small secondary -settling basin for release into Mayo
Reservoir Due to alga blooms, the pH of ash pond discharge canal is adjusted at the standpipe
as needed
Ash Transport Water — Water for sluicing fly ash and bottom ash to the ash pond is withdrawn
from the closed circulating water system. Some fly ash is handled dry by a pneumatic system and
is transported off site The water in the closed circulating water system is treated with a
dispersant for protection of the cooling tower fill
Coal Pile Runoff — The coal pile runoff is routed to the ash pond. Flow volumes are related to
rainfall frequency and intensity The annual daily average flow presented previously is based on a
coal pile area of 5 acres, an annual average rainfall of 44 inches and a runoff coefficient of 1 0
Cooling Tower Blowdown — Normally, ash transport water withdrawal from the closed circulating
water system is sufficient to control total dissolved solids (TDS) in the cooling water During
periods of maintenance, some molybdate waste from the closed cooling water system is routed to
the ash pond Also during periods of maintenance, the cooling tower basin is drained to the
reservoir

Progress Energy Carolinas, Inc.
Mayo Electric Generating Plant
National Pollutant Discharge Elimination System Permit Number NC0038377
Low Volume Wastes
Oily Wastes — Drains containing oily wastes or water are routed to the oily waste basin.
The discharge from the oily waste basin is routed through the oil—water separator where
the oil is removed and contained The treated water is then discharged to the ash pond
The fuel oil storage tank is in a containment area with a valved drain The drain is routed
to the oily waste basin
Boiler Blowdown — Boiler make-up water is withdrawn from the lake, treated by various
processes and stored in tanks until needed. The boiler water is treated with ammonia
continuously when the boilers are in service. Sodium hydroxide is used when needed
during abnormal conditions Boiler blowdown is routed to the ash pond via the low-
volume waste conveyance.
Water Treatment Wastes — Water is withdrawn from the lake and is treated by
clarification sand filtration, carbon filtration, and demineralization Various wastes such
as filter backwash, and spent regeneration chemicals such as sulfuric acid and sodium
hydroxide are routed to the ash pond via the low volume waste conveyance
Miscellaneous — Other miscellaneous sources such as wash down water, water from
various plant drains, secondary containment drains, laundry activity and temporary hand
washing stations are routed to the ash pond via the low volume waste conveyance
Miscellaneous equipment heat exchanger water can be routed to the ash pond via the
alternate cooling tower blowdown line if needed The air preheaters are water washed
infrequently Then the air preheaters wastewater is discharged to the ash pond.
Sewage Treatment Plant (STP) — Sanitary wastes are treated on-site by an extended
aeration treatment plant The plant is designed for 0 0125 MGD and consists of a screen,
comminuter, surge tank, aeration tank, clarifier, chlorine contact chamber, and a sludge
holding tank Flow from the system is dependent upon fluctuating demand due to
variations in the number of personnel on site When needed, residuals are disposed of
off-site by a licensed contract disposal firm. The STP is routed to the ash pond via the
alternate cooling tower blowdown line
Flue Gas Desulfurization Blowdown — The Flue Gas Desulfurization (FGD) system directs
flue gas into an absorber where a limestone (calcium carbonate) slurry is sprayed Sulfur
dioxide in the flue gas reacts with the limestone slurry to produce calcium sulfate
(gypsum) This system reclaims any unreacted limestone slurry to be reused in the
absorber A small blowdown stream is used to maintain the chloride concentration in the
reaction tank The blowdown stream will be discharged to a gypsum settling pond where
suspended solids will be reduced prior to entering a bioreactor. The bioreactor utilizes
microbes to reduce soluble contaminants to insoluble forms that then precipitate from
solution The treated wastewater will enter the ash pond secondary settling pond prior to
outfall 002
Storm water from Limestone and Gypsum Piles — Storm water that falls on the limestone
and gypsum storage piles will be directed to the ash pond
ASH SLUICE WATER
Fly ash and bottom ash is hydraulically conveyed by an ash sluice pipeline to the ash pond.
Water for the transport of ash is withdrawn from the closed circulating water system Some fly
ash is handled dry by a pneumatic system and transported off site The water in the closed
2

Progress Energy Carolinas, Inc.
Mayo Electric Generating Plant
National Pollutant Discharge Elimination System Permit Number NC0038377
circulating system is treated with a dispersant (acrylic acid polymer) and water based non -
oxidizing agent for protection of the cooling tower fill
ASH MANAGEMENT AND RECLAMATION
From time to time fly and bottom ash in the ash pond may be stacked or relocated within the diked
boundary of the ash pond system. As this pond management activity does not alter the chemical
character of the pond contents, no change in the nature of the discharge to the ash pond is
anticipated
In the event a practicable market becomes available, Progress Energy may exercise the option of
reclaiming ash from the ash pond system In consideration of the scope of such an operation, no
additional discharges are expected to result from ash reclamation efforts.
HERBICIDE AND PESTICIDE USAGE IN THE TREATMENT SYSTEM POND
Herbicides may be used as needed to control nuisance aquatic vegetation These herbicides are
applied by licensed applicators, or persons under the immediate supervision of a licensed
applicator, in accordance with the manufacturer's instructions.
Pesticides may be used as needed to perform biological assessments. These Pesticides are
applied by licensed applicators, or persons under the immediate supervision of a licensed
applicator, in accordance with the manufacturer's instructions
STORMWATER RUNOFF
Outfall 004 — Drainaae from Outside Storaae Area
Outfall 004 is located on the northeast side of the plant site and drains to the reservoir, using
catch basins, storm sewer and vegetative conveyance The industrial activity drained to this
outfall is primarily the facility's outside storage area including a loading dock Materials that are
not weather sensitive are stored in this area These include empty lubricant drums, structural
steel, pipes, and some large equipment parts Virtually the entire area is loose gravel, except for
the concrete unloading dock There is a storage shed in the back of the outside storage area
This shed contains any chemicals or ods that would be stored in the area The hazardous waste
central storage area is located in this same shed Sometimes during construction projects, a
portion of the outside storage area is utilized for material storage which could consist of additional
structural steel. Due to mobile equipment utilization there is a potential for petroleum release
Outfall 005 — Drainaae from Industrial Area — Main
Outfall 005 is located on the northeast side of the facility and is the end point of the plant's primary
storm sewer system that drains the "power house block" of the plant using catch basins, storm
sewer and vegetative conveyance Including the area around the boilers and turbine buildings
(both are open, no roof or walls), precipitators, and the roofs of the machine shops, administrative
buildings, warehouse, parking lot, and miscellaneous support facilities, such as the water supply
treatment, ash storage silo, SCR and transformers Also draining to this outfall through sewers is
the grassed area intended for Unit 2 at some time in the future The grassed Unit 2 area is
sometimes utilized for fabrication of structural steel for construction / maintenance projects This
area consists of gravel and grass areas For outfall 005 the potential pollutants could be coal,
coal ash, sediment, and the chemical make-up of the rain water Due to mobile equipment
utilization there is a potential for petroleum release
3

Progress Energy Carolinas, Inc.
Mayo Electric Generating Plant
National Pollutant Discharge Elimination System Permit Number NC0038377
Outfall 006a, b, c, d, e, - Cooling Tower Area
Outfall 006 is located at the eastern end of the site and drains the area around the cooling towers,
including the roof of the chemical feed budding and associated roads and parking areas using
catch basins, storm sewer and vegetative conveyance In the cooling tower area, there are five
separate outfalls These outfalls involve catch basins and storm sewers that drain to swales and
then to reservoir. The cooling tower itself has a basin for re -circulating cooling water and
therefore, does not directly contribute to storm water runoff For this outfall the potential pollutants
could include sediment, mist from the cooling tower and chemical make-up of the rainwater. A
malfunction of the cooling tower basin level and / or the cooling tower make-up system could
result in a potential release of cooling tower water Due mobile equipment utilization there is a
potential for petroleum release On rare occasions herbicides are used for ground maintenance at
the cooling towers
4

Progress Energy Carolinas, Inc.
Mayo Electric Generating Plant
National Pollutant Discharge Elimination System Permit Number NC0038377
Outfall 006a, b, c, d, e, - Cooling Tower Area
Outfall 006 is located at the eastern end of the site and drains the area around the cooling towers,
including the roof of the chemical feed building and associated roads and parking areas using
catch basins, storm sewer and vegetative conveyance In the cooling tower area, there are five
separate outfalls These outfalls involve catch basins and storm sewers that drain to swales and
then to reservoir The cooling tower itself has a basin for re -circulating cooling water and
therefore, does not directly contribute to storm water runoff For this outfall the potential pollutants
could include sediment, mist from the cooling tower and chemical make-up of the rainwater A
malfunction of the cooling tower basin level and / or the cooling tower make-up system could
result in a potential release of cooling tower water Due mobile equipment utilization there is a
potential for petroleum release On rare occasions herbicides are used for ground maintenance at
the cooling towers
4

Progress Energy Carolinas, Inc.
Mayo Electric Generating Plant
National Pollutant Discharge Elimination System Permit Number NCO038377
Form 2C — Item VI — Potential Discharges Not Covered By Analysis
Chemical
Estimated Average
Frequency
Purpose
Annual Usage
Aluminum sulfate
1,000 gals.
Continuous
Improve clarifier
floc
Polymer
50 lbs.
Continuous
Improve clarifier
floc
Sulfuric acid 93%
79,000 lbs.
As required
Demineralizer
regeneration
Sodium hydroxide
170,000 lbs.
As required
Demineralizer
regeneration
Sodium molybdate
1,100 lbs.
As required
Corrosion control
Aqua ammonia
25,000 lbs.
Continuous
Boiler water
pH control
Sodium bicarbonate
1,300 lbs.
As required
Sewage plant
H control
Sodium
100 gals.
Continuous
Potable water
hypochlonte
disinfectant
Polyphosphate
55 gals
Continuous
Corrosion control
15 % Sodium
100 gals.
Continuous
pH control
hydroxide
Potable water
Water based non-
7,000 lbs.
As required
Biofouling control
oxidizing agent
Cooling tower
Silicone based
3,900 lbs.
As required
Defoamer treatment
defoamer
Cooling tower
Dispersant (acrylic
17,000 lbs
As required
Biofoulmg control
acid polymer)
Cooling tower
Anhydrous
450,000 gals
As required
Air pollution
Ammonia
treatment system
Sulfuric acid
50,000 lbs.
As required
pH control in ash
pond
Sanunl Chlorine
100 lbs
Continuous
Sewage plant
Tablets
effluent treatment
Limestone (Calcium
270,400 tons
Continuous
Flue Gas
Carbonate)
Desulfuization

Mayo Plant
North Carolina
Attachment 5 - Form 2F - Item III - Map
Carolina Power & Light Company
Mayo Electric Generating Plant
Person County
Page 1 of 3
+4

Mayo Plant Outfalls
36'32' 02.989'N
7dSV 26.848'W
Ashpond Outfa11002 �+
W vl
3d31' S0.324'N
76'53' 43.776"W
Ash Pond Influent MVV/
36°31' 45.498"N
78°53' 20.697'W
Outfall 004
j6 4
Building
o Outfalls.
/A\ / Road.
38'31' 39 549'N
76'52' 65 505"W
78r53' 16 841-W
��Outfall 006C kie
7952'56 595'W
Outfall 005
11(K
3fi 31' 28.919"N
36 31'28.162'N
8"52' S5.735'W
3d31' 36.042'N
Cooling Tower Drain
Outfall 006E J(
7e53'07 .236"W
36°31' 34 538"N
Outfall 006A
7e63' 01.792'W
Outfall 006B
VV
Adminstration
Building
cooling
Towers
3631' 30 396-N
76'52' 65 505"W
36°31' 29.160'N
��Outfall 006C kie
7952'56 595'W
Outfall 006D
3fi 31' 28.919"N
36 31'28.162'N
8"52' S5.735'W
78'52' S7 022"W
Cooling Tower Drain
Outfall 006E J(
Outfall 001 vvw
500 0 500 1000 Meters

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MATERIAL HANDLING{
Four areas of coal handling were evaluated for their potential to create dust or particles. Also the
methods of controlling the dust were evaluated to ensure they were satisfactory in maintaining
dust control The areas evaluated were the coal car dumper, transfer boom, conveyor belt system
and coal pile.
The primary method of coal car unloading is the coal car dumper. The coal car dumper is
equipped with a dust suppression system that is used to minimize the generation of dust during
coal car unloading. Water spray nozzles are positioned such that as the coal car is dumped into
the transfer pit, the spray suppresses any dust that could be created due to the unloading activity.
Different conditions such as wind, rain and coal condition dictate the need for the dust
suppression system Whenever the operators believe the system is needed, it will be used to
prevent the creation of a dust that could enter the storm water system.
Another operation where there is the potential to create dust is the transfer of coal from the
conveyor belts to the coal pile. In order to minimize dust and on as need basis, the boom is
raised or lowered.
The conveyor belt system has been evaluated for the potential to create dust. The possibility of
the conveyor belt system to create dust or come in contact with storm water has been reduced
because the system is covered. Efforts are made to ensure the conveyor belts stay covered.
The coal pile is known as a "live pile". This is because of the way the coal is fed or reclaimed to
the unit/boilers. Coal is pulled from the bottom of the pile, therefore reducing the possibility of
dust. Storm water that comes in contact with the coal pile is routed to an NPDES discharge point
002 (via the ash pond)
SWP3 Material Handling.doc revision 3 June 2005
DPP

Outfalls
Narrative Description
Outfall 004 — Drainage from Outside Storage
Y
This outfall is located on the northeast side of the plant site and drains to the reservoir, using
catch basins and storm sewer. The industrial activity drained to this outfall is primarily the
facility's outside storage area including a loading dock Materials that are not weather sensitive
are stored in this area. These include empty lubricant drums, structural steel, pipes, and some
large equipment pants. Virtually the entire area is loose gravel, except for the concrete unloading
dock. There is a small storage shed in the back of the outside storage area. This shed contains
any chemicals or oils that would be stored in the area. The hazardous waste central storage area
is located in this same shed. During the SCR construction project, a portion of the outside
storage area is being dedicated for a laydown area for material storage which consists of
structural steel. Due to mobile equipment, on-site there is a potential for petroleum release.
Outfall 005 — Drainage from Industrial Area
The outfall is located on the northeast side of the facility and is the end point of the plant's
primary storm sewer system that drains the "power house block" of the plant Including the area
around the boilers and turbine buildings (both are open, no roof or walls), precipitators, and the
roofs of the machine shops, administrative buildings, warehouse, parking lot, and miscellaneous
support facilities, such as the water supply treatment, ash storage silo, and transformers. Also
draining to this outfall through sewers is the grassed area intended for Unit 2 at some time in the
future. During some construction projects, the Unit 2 area 1s occasionally utilized as structural
steel and fabrication area. This area consists of gravel and grass areas. For outfall 005 the
potential pollutants could be coal, coal ash, sediment, and the chemical make-up of the rain
water Due to mobile equipment, on-site there is a potential for petroleum release.
Outfall 006a, b, c, d, e — Cooling Tower Area
Outfall 006 is located at the eastern end of the site and drains the area around the cooling towers,
including the roof of the chemical feed building and associated roads and parking areas In the
cooling tower area, there are five separate outfalls All these outfalls involve catch basins and
storm sewers that drain to swales and then to the reservoir The cooling tower itself has a basin
for re -circulating cooling water and therefore, does not directly contnbute-to storm water runoff
.For this outfall the potential pollutants could include sediment, mist from the cooling tower and
the chemical make-up of the rainwater. A malfunction of the cooling fower basin level and / or
5WP3 Outfalls doe revision 4 June 2005
DFP

Memo to file: 12520 R June 4, 2003
12576
Non-Stormwater flow in Stormwater Outfall 005
During dry periods, Stormwater Outfall 005 has a discharge that is non-stormwater related.
During the time period of July — August 1996 an extensive investigation was conducted to try
and resolve where any water might be coming from. This investigation included walking lines
and catch basins loo1ji ng -for any flow into the drainage system, conducting visual observations
dunng non -normal work hours, and reviewing drawings of both stormwater and non-stormwater
drainage systems. In addition, dye was placed in nearby non-stormwater drainage systems to
ensure no cross -connections existed. Samples of the water flowing from Outfall 005 during dry
periods were collected and analyzed for pH, chlorine, appearance, odor and biocides. None of
the analyses indicated any industrial water present. It was observed that the flow would almost
stop after we had long period of no rainfall and the flow would increase if we had recent rainfall.
The last catch basin before the outfall was observed not to have any flow entenng it, however, at
the final outfall there would be a small amount of water. After several hours of researching the
source of the water it was decided that it must be groundwater intrusion at a point between the
catch basin and the outfall.
During a site visit by Bradley Bennett, Supervisor of DWQ's Stormwater and General Permits
Unit, and accompanied by Joanie Cooke (ESS), these investigations were discussed. He stated
that this was not unusual and appeared not to be concerned. Mr. Bennett was informed that we
document on the Preventative Maintenance Visual Monitoring Worksheet that we suspect
groundwater as the source from this outfall (during non -storm periods). He appeared to be okay
with the statement.
Dulcne Phillips/��d 3

Progress Energy Carolinas, Inc.
Mayo Electric Generating Plant
National Pollutant Discharge Elimination System Permit Number NCO038377
Attachment 9
E-mail Documentation Allowing Sampling Results From 2005 Permit
Renewal Application to be used in the 2006 Permit Renewal Application

Page 1 of 2
From: Sergei Chernikov (sergei chernikov@ncmail net]
Sent: Thursday, April 06, 2006 8 55 AM
To: Cahoon, Steve
Subject: Re: FW, Mayo NPDES Permit Renewal
Steve,
I have discussed this issue with Susan and we have decided that you can use those samples for permit
renewal.
Sergei
Cahoon, Steve wrote.
Sergei,
I don't think I ever received an e-mail reply from you for the question below (email is based on a
phone call we had the afternoon of Feb 27, 2006) Please reply and contact me if you have any
further questions
Thanks!
Steve Cahoon
Progress Energy Service Company - Environmental Services Section
Supply and CCO (Carolinas/Georgia)
Vnet: 770-7457
Bell- [phone]
Mail Code PEB4
steve Cahoon@pgnmail coin
-----original Message ----
From: Cahoon, Steve
Sent: Monday, February 27, 2006 3.54 PM
To: 'sergei chemiK9,&ncmai net'
Subject: Mayo NPDES Permit Renewal
Sergei,
As you are aware Progress Energy submitted an NPDES Permit Renewal application for its Mayo
Electric Generating Plant on July 29, 2005 The new permit became effective on January 1, 2006
and expires on March 31, 2007 A new permit application package must be submitted 180 days
prior to the March 31, 2007 expiration date The sampling event for our current NPDES permit was
conducted on April 1, 2005 for the wastewater and June 2, 2005 for the storm water
Progress Energy requests permission from the NPDES Unit to allow the Mayo Plant to use the data
collected from the above referenced sampling events for our upcoming NPDES permit renewal
package, that package must be submitted to the NPDES Unit by approximately October 3, 2006
Thank you for your consideration If you have any questions please contact me
9/18/200&

Page 2 of 2
Steve Cahoon
Progress Energy Service Company - Environmental Services Section
Supply and CCO (Carolinas/Georgia)
Vnet 770-7457
Bell- [phone]
Mail Code PEB4
steve.cahoon(a-pgnmail. com
Sergei Chernikov, Ph.D.
Environmental Engineer
NPDES Unit
1617 Mail Service Center
Raleigh, NC 27699-1617
phone: [phone] ext. 594
fax: [phone]
9/18/2006

�� Progress Energy
December 1, 2008
Mr. Gil Vinzani, Supervisor, Eastern NPDES Program
Division of Water Quality
North Carolina Department of Environment and Natural Resources
1617 Mail Service Center
Raleigh, NC 27699-1617
Subject: Carolina Power & Light Company dba Progress Energy Carolinas, Inc.
Asheville Steam Electric Plant NPDES Permit Number NC0000396
Cape Fear Steam Electric Plant NPDES Permit Number NC0003433
Lee Steam Electric Plant NPDES Permit Number NC0003417 _
Mayo Steam -Electric Plant NPDES Permit Number NC0038377
Roxboro Steam Electric Plant NPDES Permit Number NC0003425
Sutton Steam Electric Plant NPDES Permit Number NC0001422
Weatherspoon Steam Electric Plant NPDES Permit Number NC0005363
NPDES Permit Application Amendment
Dear Mr. Vinzani:
Progress Energy Carolinas, Inc. (PEC) proposes to amend the NPDES Permit application for the
subject facilities to add three additional freeze conditioning agents.
These facilities expect to receive shipments of coal treated with freeze conditioning agents
during the winter months (November 15 through March 15). Freeze conditioning agents, needed
depending upon expected weather conditions during transport to ensure coal does not freeze in
railcars, will be applied at an approximate rate of 2 pints per ton of coal. The product names
used by the various coal mines which supply fuel to Progress Energy Carolinas power plants
could include one or more of the additional following products (MSDSs enclosed):
Product Name Primary Composition
FreeFlow SR -300 30-50% glycerin
Flomin ST -944 SRA > 50% diethylene glycol mixture and polymer/surfactant blend
Bio -Pro 55 55% glycerin
Coal pile runoff at each of these facilities flows to a treatment system (e.g., ash pond, cooling
pond, settling basin). However, since there is a slight potential that these chemicals could be
present in the wastewater that is ultimately discharged via a permitted outfall, PEC requests that
these products be appended to the NPDES permit application. Note that toxicity testing is a
permit requirement at each power plant outfall which contains the coal pile runoff waste stream.

Mr. Gil Vinzani, NPDES Unit
December 1, 2008
Page Two
Progress Energy Carolinas, Inc., appreciates the continued cooperation demonstrated by the
Division of Water Quality staff in responding to its permitting needs. If you have any questions
or comments regarding this information, please contact Robin Bryson at [phone].
1 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 1 am aware that there are significant penalties for
submitting false information, including the possibility offines and imprisonment for knowing violations
Sincerely,
Mr. Charles M. Gates
Vice President—Power Generation Carolinas
Progress Energy Carolinas, Inc.
CMG/rb
Enclosures
c: Robin Bryson
bc: Leigh Barr
Larry Baxley
Steve Cahoon
Fred Holt
Shannon Langley
Ricky Miller
Billy Milam
Laurie Moorhead
Dulcie Phillips
Kent Tyndall
P. (). 13ox l5, -5l
NC 276021
r