NC0001422_Permit (Modification)_19960830

State of North Carolina
` Department of Environment,
Health and Natural Resources • •
Division of Water Quality
MOM
James B. Hunt, Jr., Governor AM Ift
Jonathan B. Howes, Secretary p E H N F1
A. Preston Howard, Jr., P.E., Director
August 30, 1996
Mr.John Camey
L.V. Sutton Steam Electric Plant
801 Sutton Steam Plant Road
Wilmington, North Carolina 28401
Subject: Permit Modification
NPDES Permit NC0001422
CP&L Sutton Steam Electric Plant
New Hanover County
Dear Mr.Carney:
On July 31, 1996,the Division of Water Quality issued NPDES Permit No. NC0001422
to CP&L. The monitoring frequency for total phosphorus and total nitrogen were not changed to
annually even though the cover letter stated they were. This correction has been made. Also,the
duplicate Part III condition referencing reporting of floating materials has been removed with the
remaining conditions relettered accordingly. Please insert the enclosed pages and discard the old
sheets. This correction becomes effective on the effective date of the permit.
All other terns and conditions in the original permit remain unchanged and in full effect.
These modifications are 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 December 6, 1983.
If any parts,measurement frequencies or sampling requirements contained in this
correction 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,Post Office Drawer 11666, Raleigh,North Carolina
27604. Unless such demand is made,this decision shall be final and binding.
If you have any questions concerning this permit,please contact Mr.Greg Nizich at telephone
number 919/733-5083, ext. 541.
Sincerely,
647;d _71� V-d�
-
Preston Howard, Jr., P.E.
cc: Central Files
Wilmington Regional Office,Water Quality Section
Mr. Roosevelt Childress,EPA
VPDES Files#
Facility Assessment Unit
Aquatic Survey&Toxicology Unit
P.O. Box 29535,Raleigh,North Carolina 27626-0535 Telephone [phone] FAX [phone]
An Equal Opportunity Affirmative Action Employer 5010/6 recycled/10%post-consumer paper

A
Y
The measuring points (top of well casing) of all monitoring wells shall be surveyed to
provide the relative elevation of the measuring point for each monitoring well.
The results of the sampling and analyses shall be sent to DWQ - Groundwater Section,
Permits Group,P.O. Box 29578 Raleigh, N.C. 27626-0578 on form GW-59 [Compliance
Monitoring Report Form], in sufficient time that the forms will have been received by the
last day of April.
2. Any additional groundwater quality monitoring,as deemed necessary by the Division,
shall be provided.
3. The COMPLIANCE BOUNDARY for the disposal system is specified by regulations
in 15A NCAC 2L, Groundwater Classifications and Standards. The Compliance
Boundary for the disposal system constructed prior to December 31, 1983 is established
at either(1) 500 feet from the waste disposal area, or(2) at the property boundary,
whichever is closest to the waste disposal area. An exceedance of Groundwater Quality
Standards at or beyond the Compliance Boundary is subject to immediate remediation
action in addition to the penalty provisions applicable under General Statute 143-
215.6A(a)(1).
In accordance with 15A NCAC 2L, a REVIEW BOUNDARY is established around the
disposal systems midway between the Compliance Boundary and the perimeter of the
waste disposal area. Any exceedance of standards at the Review Boundary shall require
remediation action on the part of the permittee.
D.For outfall 001,the permittee shall report all visible discharges of floating materials,
such as an oil sheen,to the Director when submitting DMR's.
E. ACUTE TOXICITY MONITORING (MONTHLY)
The permittee shall conduct acute toxicity tests on a monthly basis using protocols
defined as definitive in E.P.A. Document 600/4-85/013 entitled "The Acute Toxicity of
Effluents to Freshwater and Marine Organisms." The monitoring shall be performed as a
Fathead Minnow(Pimephales promelas) 24 hour static test,using effluent collected as a
grab sample. Effluent samples for self-monitoring purposes must be obtained during
representative effluent discharge below all waste treatment. The test will be performed
once per month in each month in which a discharge occurs.
The parameter code for this test is TAE6C. All toxicity testing results required as part
of this permit condition will be entered on the Effluent Discharge Form(MR-1) for the
month in which it was performed, using the appropriate parameter code. Additionally,
DWQ Form AT-1 (original)is to be sent to the following address:
Attention:
Environmental Sciences Branch
North Carolina Division of
Water Quality
4401 Reedy Creek Road
Raleigh, N.C. 27607
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.

J
f S.
Should test data from either these monitoring requirements or tests performed by the
North Carolina Division of Water Quality indicate that there is a reasonable potential for
water quality standards excursions in 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 retesting(within 30 days of initial
monitoring event). Failure to submit suitable test results will constitute noncompliance
with monitoring requirements.
F. The permittee shall check the diked areas for leaks by a visible inspection and shall
report any seepage detected.
G. The Permittee shall continue to implement a Best Management Practices (BMP) Plan
to control the discharge of oils and the hazardous and toxic substances listed in 40 CFR,
Part 117 and Tables II and III of Appendix D to 40 CFR, Part 122, and shall maintain the
Plan at the plant site and shall be available for inspection by EPA and DWQ personnel.
H. Continued intake screen backwash discharge is permitted without limitations or
monitoring requirements.
I. There shall be no discharge of polychlorinated byphenyl compounds such as those
commonly used for transformer fluid.
J. Biocide Condition
The permittee shall obtain authorization from the Division of Water Quality prior to
utilizing any biocide in the cooling water. The Permittee shall notify the Director in
writing not later than ninety (90) days prior to instituting use of any additional biocide
used in treatment system which may be toxic to aquatic life other than those previously
reported to the Division of Water Quality. Such notification shall include completion of
Biocide Worksheet Form 101 and a map locating the discharge point and receiving
stream. Concentrations of chromium, copper, or zinc added to biocides shall not exceed
applicable water quality standards or action levels in the receiving stream, as determined
by calculations from the Biocide Worksheet Form 101 with Supplemental Metals
Analysis worksheet.
K. Instream monitoring (locations 'U' & 'D' at outfall 00 1) shall be waived upon the
permittee submitting a copy of the signed Cape Fear River monitoring plan agreement
(with UNC-Wilmington)to the Division along with a request to drop instream monitoring
requirements.

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PART III
OTHER REQUIREMENTS
A. Construction
No construction of wastewater treatment facilities or additions thereto shall begin until
Final Plans and Specifications have been submitted to the Division of Water Quality, and
written approval and an Authorization to Construct permit has been issued.
B. Changes in Discharges of Toxic Substances
The permittee shall notify the Permit Issuing Authority as soon as it knows or has reason
to believe:
a. That any activity has occurred or will occur which would result in the discharge, on a
routine or frequent basis, of any toxic pollutant which is not limited in the permit, if
that discharge will exceed the highest of the following "notification levels":
(1) One hundred micrograms per liter(100µg/1);
(2)Two hundred micrograms per liter(200µg/1) for acrolein and acrylonitrile; five
hundred micrograms per liter(500µg/1) for 2.4-dinitrophenol and for 2-methyl-
4.6-dinitrophenol;, and one milligram per liter(1 mg/1) for antimony;
(3)Five (5)times the maximum concentration value reported for that pollutant in the
permit application.
b.. That any activity has occurred or will occur which would result in any discharge, on a
non-routine or infrequent basis, of a toxic pollutant which is not limited in the permit,
if that discharge will exceed the highest of the following "notification levels":
(1)Five hundred micrograms per liter(500 gg/1);
(1)One milligram per liter(1 mg/1) for antimony;
(3)Ten (10)times the maximum concentration value reported for that pollutant in the
permit application.
C. Groundwater Monitoring
The permittee shall, upon written notice from the Director of the Division of Water
Quality, conduct groundwater monitoring as may be required to determine the
compliance of this NPDES permitted facility with the current groundwater Standards.
1. Monitor wells (2C,413, 5C, 6C, 7C, 8, 9, 10, 11 and 12) shall be sampled every March
for the following parameters: Water Levels, pH, Arsenic, Iron, Total Dissolved Solids,
Chlorides and Selenium.
The measurement of water levels must be made prior to sampling for the remaining
parameters. The depth to water in each well shall be measured from the surveyed point
on the top of the casing.

State of North Carolina
Department of Environment,
• Health and Natural Resources A
• •
Division of Water Quality 119
- - - V
Jaynes B. Hunt, Jr., Governor
Jonathan B. Howes, Secretary p E H N F1
A. Preston Howard, Jr., P.E., Director
July 31, 1996
Mr.John Carney
L.V. Sutton Steam Electric Plant
801 Sutton Steam Plant Road
Wilmington, North Carolina 28401
;subject: Permit Renewal
NPDES Permit NC0001422
CP&L Sutton Steam Electric Plant
New Hanover County
Dear Mr.Carney:
In accordance with your application for discharge permit received on November 2, 1995 we are
forwarding herewith the subject State-NPDES 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 US Environmental Protection Agency dated December 6, 1983.
In response to CP&L's letter of May 6, 1996,regarding the draft permit,the following
modifications/comments are offered:
General-
-Page numbering-Due to the constraints of the computer system used,this option is not
presently possible. However,to simplify your review of Division responses,the page
numbers designated in your letter are referred to herein.
Page 2(S1zpplement to Permit Cover Sheet)-
•The language allowing discharge of ash sluice water from outfall 002 has been added. The
revised water flow schematic has been added to the permit application as well.
•The reference to Part III has been removed.
Page 3(Map)-
-The map provided with your letter has been substituted.
Page 4(Outfall 001)-
•The heading language has been revised to indicate that wastewater from outfalls 002,003
and 004 are components of outfall 001.
•The form and units of the parameters to be monitored have been specified.
P.O.Box 29535,Raleigh,North Carolina 27626-053b i;,lephone 919-733-5083 FAX [phone]
An Equal Opportunity Affirmative Action Employer 50%recycled/10%post-consumer paper

•The limit reference has been corrected to a daily maximum as listed in 40 CFR 432.
•The monitoring frequency for total phosphorus and total nitrogen has been changed to
annually since instream concentrations are typically higher than levels in the cooling pond.
•The footnote regarding instream monitoring and Part III condition have been revised
indicating instream monitoring will be dropped if monitoring through the Cape Fear Coalition
is performed.
•The footnote referring to temperature requirements has been corrected for Class'C'waters.
•The wasteload allocation fact sheet mistakenly cited nitrogen discharges to the river as a
reason for inclusion of a toxicity test at this outfall. DWQ policy requires all industrial
dischargers be given a whole effluent toxicity test. The 24-hour test is now specified rather
than the 48-hour test.
Page 5 (Outfall 002) -
-References to discharges from outfall 003 and stormwater have been included in the header.
•The monitoring requirements for copper and iron have been deleted as requested. The
monitoring requirements for arsenic and selenium have been maintained since these are
pollutants of concern at this outfall and could impact the lake which is used for secondary
recreation. All parameters will continue to be monitored at Outfall 001.
•The footnote referring to various wastewater components has been deleted since they are
now included in the header.
•The pH monitoring requirement has been deleted since pH is limited at Outfall 001.
•The statement referring to floating solids or visible foam has been removed.
Page 6(Outfall 003)-
-The pH monitoring requirement has been deleted since pH is limited at Outfall 001.
•The statement referring to floating solids or visible foam has been removed.
Page 7(Outfall 004)-
-References to discharges from outfall 003 and stormwater have been included in the header.
•The monitoring requirements for copper and iron have been deleted as requested.
Monitoring for arsenic and selenium will remain for the reason cited under outfall 002. These
parameters will continue to be monitored at Outfall 001.
•The footnote referring to wastewater components has been deleted since this was added to
the header.
•The pH monitoring requirement has been deleted since pH is limited at Outfall 001.
•The statement referring to floating solids or visible foam has been removed.

22 (Part II E.9.) -
•This revision will be considered when the boilerplate language is revised.
Pages 23-26 (Part III) -
•Section B,Groundwater Monitoring, has been combined with site-specific groundwater
monitoring requirements listed in Section F. These requirements are now listed in Section C.
•Section D,Continually Evaluate Language,has been eliminated.
• Section E,Toxicity has been revised as previously discussed under"Page 4"responses.
The parameter code has been changed accordingly. The sample type has been corrected to
read"grab". Language has been added requiring testing at least once per month in each month
in which a discharge occurs since discharge is infrequent. The language regarding re-opening
of the permit has been modified,however the word "decisively" has been omitted. The
language regarding retesting has not been modified. The intent is to prevent facilities from
submitting invalid tests repeatedly. CP&L's interpretation of a retest being considered
suitable is valid.
•Section F.1. -The GW-59 form specified in this condition contains instructions intended to
allow flexibility for analysis of various parameters. The proposed language is not applicable
nor in compliance with policy on metals analyses. A copy of DWQ policy is attached.
• Section F.1. -The paragraph listing the submittal date has been revised.
•Section F.3. -The language on compliance and review boundaries as listed in the regulations
is sufficiently precise that references in this condition have not been modified.
•Section F.4. -This was inadvertently included and has been removed.
Page 25(Part III) -
•Section I-This condition regarding discharge of any registered product has been deleted.
Page 26(Part III)-
-9 Section N-The instream monitoring language has been revised as previously discussed.
If any parts,measurement frequencies or sampling requirements contained in this permit are
unacceptable to you,you have the right to an adjudicative 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, Post Office Drawer 27447,Raleigh,North Carolina 27611 -7447.
Unless such demand is made,this decision shall be final and binding.
Please take notice this permit is not transferable. Part H,EA. addresses the requirements to be
followed in case of change in ownership or control of this discharge.
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,Coastal Area
Management Act or any other Federal or Local governmental permit that may be required.

• r .
If you have any questions concerning this permit, please contact Mr. Greg Nizich at telephone
number 919/733-5083, ext. 541.
Sincerely,
Original Signed BY
Coleen H. Sullins
A. Preston Howard, Jr., P.E.
Attachment
cc: Central Files
Mr. Roosevelt Childress, EPA
Wilmington Regional Office,Water Quality Section
Facility Assessment Unit
Aquatic Survey &Toxicology Unit
Technical Assistance &Certification Group
spits and Engineering Unit

Permit No. NC0001422
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENT, HEALTH, 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 Company
is hereby authorized to discharge wastewater from a facility located at
Sutton Steam Electric Plant
US Highway 421
north of Wilmington
New Hanover County
to receiving waters designated as the Cape Fear River in the Cape Fear River Basin
in accordance with effluent limitations,monitoring requirements,and other conditions set forth in
Parts I, 11,III and IV hereof.
This permit shall become effective September 1, 1996
This permit and authorization to discharge shall expire at midnight on June 30,2001
Signed this day July 31, 1996
Original Signed BY
Coleen H. Sullins
A.Preston Howard,Jr.,P.E.,Director
Division of Water Quality
By Authority of the Environmental Management Commission

Permit No.NC0001422
SUPPLEMENT TO PERMIT COVER SHEET
Carolina Power and Light Company
is hereby authorized to:
1. Continue to discharge cooling pond blowdown,recirculated cooling water,non-
contact cooling water,and treated wastewater from internal outfalls 002,003 and 004
(outfall 001); coal pile runoff, low volume wastes,ash sluice water,and stormwater
runoff(outfall 002); chemical metal cleaning waste(outfall 003);and ash sluice water,
coal pile runoff,low volume wastes,and stormwater runoff(outfall 004)at a facility
located at Sutton Steam Electric Plant, US Highway 421,north of Wilmington,New
Hanover County,and
2. Discharge from said treatment works at the location specified on the attached map
into the Cape Fear River which is classified Class "C-Swamp"waters in the Cape Fear
River Basin.

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V
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Old Ash Pond
Discharge
4.
.- - Intake Cartel
Plant Sits
: Cooling Pont!
Discharge Spillway
4 Sutton Steam
Electric Plant
NORTH CAROLINA .

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PART III
OTHER REQUIREMENTS
A. Construction
No construction of wastewater treatment facilities or additions thereto shall begin until
Final Plans and Specifications have been submitted to the Division of Water Quality, and
written approval and an Authorization to Construct permit has been issued.
B. Changes in Discharge of Toxic Substances
The permittee shall notify the Permit Issuing Authority as soon as it knows or has reason
to believe:
a. That any activity has occurred or will occur which would result in the discharge, on a
routine or frequent basis,of any toxic pollutant which is not limited in the permit, if
that discharge will exceed the highest of the following "notification levels":
(1)One hundred micrograms per liter(100 gg/l);
(2)Two hundred micrograms per liter(200µg/1) for acrolein and acrylonitrile; five
hundred micrograms per liter(500µg/1) for 2.4-dinitrophenol and for 2-methyl-
4.6-dinitrophenol;, and one milligram per liter(1 mg/1)for antimony;
(3)Five (5)times the maximum concentration value reported for that pollutant in-the
permit application.
b.. That any activity has occurred or will occur which would result in any discharge, on a
non-routine or infrequent basis, of a toxic pollutant which is not limited in the permit,
if that discharge will exceed the highest of the following "notification levels":
(1)Five hundred micrograms per liter(500µg/1);
(1)One milligram per liter(1 mg/1)for antimony;
(3) Ten (10)times the maximum concentration value reported for that pollutant in the
permit application.
C. Groundwater Monitoring
The permittee shall, upon written notice from the Director of the Division of Water
Quality, conduct groundwater monitoring as may be required to determine the
compliance of this NPDES permitted facility with the current groundwater Standards.
1. Monitor wells (2C,4B, 5C, 6C, 7C, 8, 9, 10, 11 and 12) shall be sampled every March
for the following parameters: Water Levels,pH, Arsenic, Iron, Total Dissolved Solids,
Chlorides and Selenium.
The measurement of water levels must be made prior to sampling for the remaining
parameters. The depth to water in each well shall be measured from the surveyed point
on the top of the casing.

The measuring points(top of well casing)of all monitoring wells shall be surveyed to
provide the relative elevation of the measuring point for each monitoring well.
The results of the sampling and analyses shall be sent to DWQ-Groundwater Section ,
Permits Group,P.O. Box 29578 Raleigh,N.C. 27626-0578 on form GW-59 [Compliance
Monitoring Report Form], in sufficient time that the forms will have been received by the
last day of April.
2. Any additional groundwater quality monitoring, as deemed necessary by the Division,
shall be provided.
3. The COMPLIANCE BOUNDARY for the disposal system is specified by regulations
in 15A NCAC 2L,Groundwater Classifications and Standards. The Compliance
Boundary for the disposal system constructed prior to December 31, 1983 is established
at either(1) 500 feet from the waste disposal area, or(2)at the property boundary,
whichever is closest to the waste disposal area. An exceedance of Groundwater Quality
Standards at or beyond the Compliance Boundary is subject to immediate remediation
action in addition to the penalty provisions applicable under General Statute 143-
215.6A(a)(1).
In accordance with 15A NCAC 2L, a REVIEW BOUNDARY is established around the
disposal systems midway between the Compliance Boundary and the perimeter of the
waste disposal area. Any exceedance of standards at the Review Boundary shall require
remediation action on the part of the permittee.
D.The permittee shall report all visible discharges of floating materials, such as an oil
sheen,to the Director when submitting DMR's.
E. ACUTE TOXICITY MONITORING (MONIU
The permittee shall conduct acute toxicity tests on a monthly basis using protocols
defined as definitive in E.P.A. Document 600/4-85/013 entitled "The Acute Toxicity of
Effluents to Freshwater and Marine Organisms. The monitoring shall be performed as a
Fathead Minnow (Pimephales promelas) 24 hoar static test, using effluent collected as a
grab sample. Effluent samples for self-monitoring purposes must be obtained during
representative effluent discharge below all waste treatment. The test will be performed
once per month in each month in which a discharge occurs.
The parameter code for this test is TAE6C. All toxicity testing results required as part
of this permit condition will be entered on the Effluent Discharge Form(MR-1) for the
month in which it was performed, using the appropriate parameter code. Additionally,
DWQ Form AT-1 (original)is to be sent to the following address:
Attention:
Environmental Sciences Branch
North Carolina Division of
Water Quality
4401 Reedy Creek Road
Raleigh, N.C. 27607
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 test data from either these monitoring requirements or tests performed by the
North Carolina Division of Water Quality indicate that there is a reasonable potential for
water quality standards excursions in 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 retesting(within 30 days of initial
monitoring event). Failure to submit suitable test results will constitute noncompliance
with monitoring requirements.
F. The permittee shall report all visible discharges of floating materials, such as an oil
sheen,to the Director when submitting DMRs.
G. The permittee shall check the diked areas for leaks by a visible inspection and shall
report any seepage detected.
H. The Permittee shall continue to implement a Best Management Practices (BMP)Plan
to control the discharge of oils and the hazardous and toxic substances listed in 40 CFR,
Part 117 and Tables II and III of Appendix D to 40 CFR, Part 122, and shall maintain the
Plan at the plant site and shall be available for inspection by EPA and DWQ personnel.
I. Continued intake screen backwash discharge is permitted without limitations or
monitoring requirements.
J. There shall be no discharge of polychlorinated byphenyl compounds such as those
commonly used for transformer fluid.
K. Biocide Condition
The permittee shall obtain authorization from the Division of Water Quality prior to
utilizing any biocide in the cooling water. The Permittee shall notify the Director in
writing not later than ninety (90) days prior to instituting use of any additional biocide
used in treatment system which may be toxic to aquatic life other than those previously
reported to the Division of Water Quality. Such notification shall include completion of
Biocide Worksheet Form 101 and a map locating the discharge point and receiving
stream. Concentrations of chromium, copper, or zinc added to biocides shall not exceed
applicable water quality standards or action levels in the receiving stream, as determined
by calculations from the Biocide Worksheet Form 101 with Supplemental Metals
Analysis worksheet.
L. Instream monitoring(locations'U' &'D'at outfall 001) shall be waived upon the
permittee submitting a copy of the signed Cape Fear River monitoring plan agreement
(with UNC-Wilmington)to the Division along with a request to drop instream monitoring
requirements.

SOC PRIORITY PROJECT: No
To: Permits and Engineering Unit
Water Quality Section
Attention: Greg Nizich
(Review Engineer)
Date: February 2, 1996
NPDES STAFF REPORT AND RECOMMENDATION
County: New Hanover
Permit No. NC0001422
PART I - GENERAL INFORMATION
1. Facility and Address: Carolina Power and Light Company
L.V. Sutton Stream Electric Plant
801 Sutton Steam Plant Road
Wilmington, North Carolina 28401
2. Date of Investigation: January 23, 1996
3. Report Prepared by: Jim Bushardt
4. Persons Contacted and Telephone Number: Ricky Miller
(919) 546-7185
5. Directions to Site: The site is located on US Hwy 421 North,
approximately 3.5 miles north of Wilmington.
6 . Discharge Point(s) :
Latitude: 34°16 '56" Longitude: 77059122"
U.S.G.S. Quad No: J27SW U.S.G.S. Quad Name: Castle Hayne, NC
7. Site size and expansion area consistent with application ?
Yes
8. Topography: The terrain is relatively flat and elevated to an
average of 20 feet MSL.
9 . Location of nearest dwelling: The closest dwelling is located
greater than 1/2 mile from the treatment facility.

10. Receiving stream or affected surface waters: Cape Fear River
a. Classification: Class "C swamp" waters
_ b. River Basin and Subbasin No. : 03 06 17
C. Describe receiving stream features and pertinent
downstream uses: High velocity, high flow river
usable for secondary recreation.
PART II - DESCRIPTION OF DISCHARGE AND TREATMENT WORKS
1. Pertinent Information:
a. Volume of wastewater to be permitted: 250 MGD
The facility's last discharge activity was in February
1995 . CP&L estimated that discharge events (cooling pond
blowdown) will be a couple of times per year.
b. What is the current permitted capacity of the wastewater
treatment facility? Not defined
C. Actual treatment capacity of the current facility
(current design capacity) ? 34,000 gpm as limited by
effluent pumps .
d. Dates and construction activities allowed by previous
Authorizations to Construct issued in the previous two
years: None
e. Please provide a description of existing or substantially
constructed wastewater treatment facilities: All waste
streams are ultimately discharged to the facility's 6900
ac-ft cooling pond prior to river discharge. Treatment
processes include sedimentation, neutralization,
evaporation, precipitation and oxidation.
Oily wastes flow in series to a gravity oil/water
separator, a concrete lined retention basin, an ash pond,
and to the cooling pond.
Low volume wastes flow in series to a concrete lined
retention basin, an ash pond, and the cooling pond.
Chemical metal cleaning wastes flow in series to an ash
pond and the cooling pond.
Intake structure screen wash flows to the cooling pond.
Coal pile and tank farm stormwater flows in series to an
ash pond and cooling pond.
Ash sluice flows in series to an ash pond and cooling
pond.
Service water heat exchanger flows to the cooling pond.
Yard drains flow to either the concrete lined retention
basin, ash pond, cooling pond, or go directly to the
cooling pond.

f. Please provide a description of proposed wastewater
treatment facilities: Nothing new is proposed.
g. Possible toxic impacts to surface waters: None
h. Pretreatment Program: Not a POTW
+ 2. Residuals handling and utilization/disposal scheme: The
product separated within the oil/water separator is burned.
Fly and bottom ash are permitted for reuse. No other
wastewater treatment residual is disposed.
i 3. Treatment plant classification: Class II
4 . SIC Code: 4911
Wastewater Codes: Primary: 14
Secondary: 16, 22, 68, 37, 69, 70, 73
Main Treatment Unit Code: 30206
PART III - OTHER PERTINENT INFORMATION
1. Is this facility being constructed with Construction Grant
Funds or are any public monies involved? No
2 . Special monitoring or limitations (including toxicity)
requests : CP&L is participating with the CFR Technical
Committee's monitoring plan per Part III, Condition N of the
current permit. DEM approval of the plan is forthcoming, but
the program is scheduled to begin in February 1996 . According
to James Merritt .of UNCW, CP&L will be required to sign a
river monitoring agreement with the program administrator
(UNCW) within the near future, and the company has provided
funding. The Division has indicated that once CP&L has begun
to participate in the monitoring program, instream monitoring,
currently defined within the permit, can be waived. It is
recommended that the in-stream monitoring requirements be
waived upon CP&L submitting a copy of the signed river
monitoring plan agreement (with UNCW) to DEM with a request
for dropping the in-stream monitoring activities. Part III,
Condition N should be modified accordingly.
3. Important SOC, JOC or Compliance Schedule dates : None
4 . Alternative Analysis Evaluation: Has the facility evaluated
all of the non-discharge options available? Please provide
regional perspective for each option evaluated. Alternative
analysis is not practical with a 250 MGD flow.
5. Other Special Items: The cooling pond dikes were visually
evaluated for dam safety concerns. The internal sloped sides
are constructed of concrete or rip-rap. No excessive erosion
of outer slopes or obvious structural anomalies could be
noticed. The ash ponds dikes were not evaluated because if
failures occurred that produced discharges, the flow would be
contained within the cooling pond.

• 1
PART IV - EVALUATION AND RECOMMENDATIONS
This report is being prepared based upon a permit renewal
request by the Permittee. The CP&L Sutton Steam Electric Plant is
located a few miles up-river from downtown Wilmington. It is a coal
fired power generation facility consisting of three units with a
total capability of 613 MWe. The facility releases cooling pond
water to the Cape Fear River upon occasion at a daily rate of
approximately 250 MGD. The purpose of the occasional discharge
activities is to control pollutant concentrations or water level
within the impoundment to acceptable operational levels. The
previous release was performed in February 1995 at a rate of 268.9
MGD. The majority of DMR history indicates that discharges are
nonroutine. Monitoring is not required in the absence of discharge
activities . Therefore, the information database is limited. The
February 1995 discharge event resulted in permit compliance for all
limited parameters (effluent and in-stream) . The results of the
acute toxicity test performed during the discharge event indicated
an LC 50 of greater than 99%. In addition, the priority pollutant
concentrations were below detection or desirably low.
There is a total of four outfalls at this facility in
accordance with requirements defined within 40 CFR, Part 423 .
Outfall 001 is recirculated cooling pond water, screen wash water
and yard drains (including stormwater) that is discharged to the
Cape Fear River. Outfall 002 consists of coal pile runoff, low
volume wastes, and contributions from Outfall 003 that discharge to
the Old Ash Pond. Outfall 003 consists of chemical metal cleaning
wastes that discharge to the New and Old Ash Ponds . Outfall 004
consists of ash sluice and contributions from Outfall 003 that
discharge to the New Ash Pond. All outfalls ultimately discharge to
the river via Outfall 001.
Representatives of CP&L indicated during the site inspection
that there are no additional requests pertaining to permit
modification. The permit appears to fulfill the requirements of 40
CFR, Part 423 pertaining to effluent guidelines for power
generation facilities. However, this is a primary industry per 40
CFR, Part 122, and there does not appear to be an APAM requirement
within the permit's monitoring requirements for Outfall 001. CP&L
did submit a priority pollutant analysis for a 1992 discharge event
and as mentioned above, pollutant concentrations were low or below
detection levels . There is no record within Regional Office Files
that pertain to the APAM testing at the Sutton Plant. In the
absence of permit history or prior agreement documentation, the
Wilmington Office defers actions pertaining APAM monitoring
requirements to the Permits & Engineering Group.
Carolina Power & Light Company is required to evaluate storage
capacity within the ash ponds for BPT and BAT operational limits.
The results indicate that both ash ponds have sufficient volume for
combined storage of storm flows, maximum 24 hour plant flows, and
solids accumulations .

It is recommended that NPDES Permit No. NC0001422 be prepared
and placed at public notice. If no significant adverse public
comment is received, it is recommended that the permit be reissued
to Carolina Power & Light Company - L.V. Sutton Steam Electric
Plant in accordance with the basinwide permitting strategy.
2 9�
nature of report preparer Dalte
[fig L
Water Quality Regional Supervisor Date
ENCLOSURE
cc: Wilmington Office Files
Central Files
Technical Support Branch
JB:SUTTON. 196