NC0065099_Permit (Issuance)_20040630

NPDES DOCYNENT SCANNING COVER SHEET
NC0065099
CPI Southport
NPDES Permit:
Document Type:
Permit Issuance
Wasteload Allocation
Authorization to Construct (AtC)
Permit Modification
Complete File - Historical
Engineering Alternatives (EAA)
Technical Correction
Instream Assessment (67b)
Speculative Limits
Environmental Assessment (EA)
Document Date:
June 30, 2004
This document is printed on reuse paper - ignore any
content on the reirersse aide

Michael F. Easley, Governor
State of North Carolina
William G. Ross, Jr., Secretary
Department of Environment and Natural Resources
Alan W. Klimek P.E., Director
Division of Water Quality
June 30, 2004
Sheryl G. Sawyer
Environment, Health and Safety Manager
Cogentrix Energy, Inc.
P.O. Box 6141
Suffolk, Virginia 23434
Subject: Issuance of NPDES Permit NC0065099
Cogentrix Southport Plant
Brunswick County
Dear Ms. Sawyer:
The Division of Water Quality (the Division) hereby issues this final permit for the subject facility.
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.
Addition to Low Volume Wastes. The Division acknowledges the permittee's request to discharge
additional low -volume wastes described in Cogentrix's letter dated March 24, 2002. Considering the
relatively low volume (less than 5,000 gallons per year), the extreme dilution available (1,700 MGD
available in the BSEP discharge canal), and the relatively low contaminant concentrations, the Division
concurs with the permittee that this discharge poses no threat to waters of the state. This request is
therefore granted. Considering the above, and the absence of significant changes in this facility's
processes, the Division has made only minor changes to your previous permit.
Permit Renewal -- Recommended Chan i es/Additions
Parameter LOutfall
Comments / Renewal Action
TSS
001
Daily Max raised from 50 mg/L to 100 mg/L, per 40 CFR 423
Total Chromium
002
Daily Max lowered to 0.2 mg/L per 40 CFR 423
Total Copper
002
Deleted from the permit — No water -quality based concerns
Total Barium
002
Deleted from the permit — No water -quality based concerns
126 Priority Pollutant
003
Added to final outfall
If any parts, measurement frequencies, or sampling requirements contained in this permit are
unacceptable, you have the right to an adjudicatory hearing upon written request within thirty (30)
days after receiving this letter. Your request must be in the form of a written petition conforming to
Chapter 150B of the North Carolina General Statutes, and must be filed with the office of
Administrative Hearings, 6714 Mail Service Center, Raleigh, North Carolina 27699-6714. Unless
such a demand is made, this permit shall be final and binding.
AV:WA
NCDENR
North Carolina Division of Water Quality 1617 Mail Service Center Raleigh, NC 27699-1617 [phone] Customer Service
1 800 623-7748

Cogentrix Energy, Inc.
Cogentrix Energy — Southport Plant
Issuance of NPDES Permit NC0065099
Page 2
This permit is not transferable except after notifying the Division of Water Quality. The Division may
require modification, or revocation and re -issuance of this permit. Please notice that this permit does
not affect your legal obligation to obtain other permits required by the Division of Water Quality, the
Division of Land Resources, the Coastal Area Management Act, or other federal or local
governments.
If you have questions, or if we can be of further service, please contact Joe Corporon at
[[e-mail]] or call [phone], extension 597.
Respectfully,
ORIGINAL SIGNED BY
Mark McIntire
Alan W. Klimek, P.E.
cc: Central Files
Wilmimiton Regional Office, Water Quality Section
NPDES Unit

Permit NC0065099
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
(NPDES)
In compliance with the provisions 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,
Cogentrix of North Carolina, Inc
is hereby authorized to discharge wastewater from a facility located at the
Cogentrix of North Carolina - Southport Plant
1281 Cogentrix Drive, Southport
Brunswick County
to receiving waters designated as the Atlantic Ocean below the Cape Fear River Basin via Progress
Energy's Brunswick Steam Electric Plant's (BSEP) discharge canal, in accordance with effluent
limitations, monitoring requirements, and other conditions set forth in Parts I, II, III, and IV hereof.
This permit shall become effective August 1, 2004.
This permit and authorization to discharge shall expire at midnight on November 30, 2006.
Signed this day June 30, 2004.
ORIGINAL SIGNED BY
Mark McIntire
Alan W. Klimek, P.E., Director
Division of Water Quality
By Authority of the Environmental Management Commission

Permit NC0065099
SUPPLEMENT TO PERMIT COVER SHEET
All previous NPDES Permits issued to this facility, whether for operation or discharge are
hereby revoked, and as of this 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 described
herein.
Cogentrix of North Carolina, Inc. is hereby authorized to:
1. Continue to operate a wastewater treatment system for coal -pile runoff, sump -water
discharge, and low -volume wastewater (internal Outfall 001); a cooling tower blowdown
system (internal Outfall 002); located at Cogentrix of North Carolina -- Southport Plant,
1281 Cogentrix Drive, Southport, Brunswick County.
2. Combined the effluents (Outfalls 001 and 002) from said treatment works for discharge at
Outfall 003, via Brunswick Steam Electric Plant's discharge canal (at a location
specified on the attached map) into the Atlantic Ocean, a Class SB waterbody below the
mouth of the Cape Fear River Basin.

Lat: 33° 57' 07"
Long: 78° 01' 20"
(flows northwest toward canal,
then southwest)
Cogentrix of North Carolina, Inc.
Southport Plant
Stream Class: SB
Sub -Basin: 03-06-17
Receiving Stream: Atlantic Ocean
4tatr. Grid/Quad: L 26 NE / Southport, NC
Drainage Basin: Cape Fear River Basin
Permitted Flaw: Not limited
Cogentrix of NC
Approximate property
boundary
North
NPDES Pennit No. NC0065099
Brunswick County

Permit NC0065099
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 coal pile runoff and low -volume wastewater from internal Outfall 001. Such discharges
shall be limited and monitored by the Permittee as specified below:
PARAMETER
LIMITS
MONITORING
REQUIREMENTS
Monthly
Average
Daily
Maximum
Measurement
Frequency
Sample
Type
Sample
Locationl
Flow
Continuous
Recorder
Effluent
Total Suspended Solids
30.0 mg/L
100.0 mg/L
2 / Month
Composite
Effluent
Oil and Grease
15.0 mg/L
20.0 mg/L
2 / Month
Grab
Effluent
Notes:
1 The Permittee shall prevent plant site oils, hazardous substances, or toxic substances from combining with site
runoff.
A. (2) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS [002]
During the period beginning on the effective date of the permit and lasting until expiration, the Permittee is
authorized to discharge cooling tower blowdown from internal Outfall 002. Such discharges shall be limited and
monitored by the Permittee as specified below:
PARAMETER
LIMITS
MONITORING
REQUIREMENTS
Monthly
Average
Daily
Maximum
Measurement
Frequency
Sample
Type
Sample
Location
Flow
Weekly
Recorder
Effluent
Free Available Chlorinel
0.2 mg/L
0.5 mg/L
Weekly
Grab
Effluent
Total Chromium
0.2 mg/L
2 / Month
Composite
Effluent
Total Zinc
1.0 mg/L
2 / Month
Composite
Effluent
Notes:
1. Neither free available chlorine (FAC) nor total residual chlorine (TRC) may be discharged from any
single generating unit for more than two hours in any single day. Not more than one unit may
discharge FAC or TRC at any one time unless the permittee can demonstrate to the Division of
Water Quality that units cannot operate at or below this level of chlorination. Limitations for
chlorine are instantaneous average and instantaneous maximum. Monitoring will be required only
during those weeks when chlorination occurs.
2. This permit has Special Conditions concerning the use of biocides in cooling water [see Special
Condition A.(4).]

Permit NC0065099
A. (3) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS [003]
During the period beginning on the effective date of the permit and lasting until expiration, the Permittee is
authorized to discharge from final Outfall 003 (combines flows from Outfall 001 and Outfall 002). Such discharges
shall be limited and monitored by the Permittee as specified below:
PARAMETER
LIMITS
MONITORING
REQUIREMENTS
Measurement
Frequency
Sample
Type
Sample
Location
The 126 Priority Pollutants
(40 CFR Part 423, Appendix A)
Excluding Zinc and Chromium'
No Detectable Amount
Annual
Grab
Effluent
Notes:
1. The Permittee must monitor these parameters only if the permittee adds these materials for cooling tower
maintenance [40CFR 423.13 (d)(1)]. There shall be no detectable amounts of the 126 priority pollutants
(40CFR 423, Appendix A) contained in chemicals added to the cooling towers except for Total Chromium
and Total Zinc (covered under biocide approvals).
Final discharge shall contain no floating solids or foam visible in other than trace amounts.
A. (4) USE OF BIOCIDES - SPECIAL CONDITION
There shall be no chromium, zinc or copper added to the treatment system except as pre -approved additives to
biocidal compounds.
The permittee shall obtain approval from the Division's Aquatic Toxicology Unit prior to the use of any biocide (not
previously approved by the Division) in the effluent discharged under this permit. Approval for use of any biocide not
previously approved should be requested at least 90 days in advance of any planned usage.
Contact the Aquatic Toxicology Unit for detailed instructions on requesting approval of biocides:
NC DENR / DWQ / Aquatic Toxicology Unit
1621 Mail Service Center
Raleigh, North Carolina 27699-1621

NPDES PERMIT
DRAFT / FINAL
TILE CONTENTS:
Lef e:
New Tracking Slip.
O Old Tracking Slip.
Right side:
❑ Streamline Package Sheet
(+„Draft Permit Cover Letter.
Dr Draft Permit
I� acility Map
®' Fact Sheet.
ermit Writer's Notes
E Staff Report from Region
�/iOld Permit
[—gam/Permit Application.
LAY Acknowledgement Letter
❑ Permittee Responses
❑ Waste Load Allocation
Facility Faci ity
CHECK LIS
T el PO
Permit No.
NPDES Permit Writer
(to region, only if stream ' ed)
(add new policy text; . mmarize major c nges to permit)
(order: cover, suppl: ent, map, effluen sheets, special conditions)
(E-Map: include cility Outfalls; U ad D sample locations)
(document per it writer's issues an re -issue logic)
(if not in Fac Sheet -- chronology, strategy, DMR Review, RPA, etc.)
(as appro. ate -- not needed if streamlined)
(Text, Effluent Sheets and Special Conditions)
(New Permit or Renewal; any additional permittee correspondence)
(NPDES Unit written response to Renewal Application)
(to acknowledgement letter, if any)
(reference date; notes if recalculated for current action)
COD. EF.7Dc(
Note: Italics indicate special conditions not always required or applicable.
19' Submitted to / r?f`,M
dr-Peer Review completed by f. "
❑ Public Notice System Update
/Permit Mailed / -Mailed to 5 i W
Lri Regional Office Review completed by
❑ Submitted to
or Peer Review: Date �/ ��� . Admin cutoff /
Date
BIMS Update: Events Limits
(Regional Staff) by Date 6.0
136 �s�LY
for Public Notice on
Date
❑ Additional Review by initiated by
❑ Additional Review completed by
/7z.
: Notice Date ag/_
Date
on: Date
td FINAL to Dave / Susan / Tom for signature on Letter Dated ' \ K
O Additional Review
❑ Additional Review ,�`
❑ Final Files transferred to Server (Permits Folder) /6 UrWr f . BIMS Update: Events vr-
Limits /
Co, 6-C3
elm

PUBLIC NOTICE OF FINAL
STATE OF NORTH CAROLINA
ENVIRONMENTAL
MANAGEMENT
COMMISSION/NPDES UNIT
1617 MAIL SERVICE CENTER
RALEIGH, NC 27699-1617
NOTIFICATION OF INTENT
TO ISSUE A NPDES
WASTEWATER PERMIT
On the basis of thorough staff
review and application of NC
General Statute 143.21, Public law
92-500 and other lawful standards
and regulations, the North Carolina
Environmental Management
Commission proposes to issue a
National Pollutant Discharge
Elimination System (NPDES)
wastewater discharge permit to the
person(s) listed below effective 45
days from the publish date of this
notice.
COGENTRIX ENERGY, INC., has
applied for renewal of the NPDES
permit (NC0065099) for its
Southport cogeneration facility in
Brunswick County. This facility
operates two permitted outfalls, 001
and 002, both discharging to the
Atlantic Ocean, class SB waters in
the Cape Fear River Basin. No
parameters are water quality limited
at this time, however the discharge
may impact future allocation of the
resource.
Written comments regarding the
proposed permit will be accepted
until 30 days after the publish date of
this notice. All comments received
prior to that date are considered in
the final determinations regarding
the proposed permit. The Director of
the NC Division of Water Quality
may decide to hold a public meeting
for the proposed permit should the
Division receive a significant degree
of public interest.
Copies of the draft permit and
other supporting information on rile
used to determine conditions present
in the draft permit are available
upon request and payment of the
costs of reproduction. Mail
comments and/or requests for
information to the NC Division of
Water Quality at the above address
or call Ms. Valery Stephens at 919-
733-5083, extension 520. 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.
(5-5c)
. •
BRUNSWICK COUNTY
NORTH CAROLINA
AFFIDAVIT OF PUBLICA
Cif
II
J UN 3 2004
LOIT
Before the undersigned, a Notary Public of said County and State,
duly commissioned, qualified and authorized by law to administer
oaths, personally appeared MARISA BUNDRICK, who, being first
duly sworn, deposes and says that she is the employee authorized to
make this affidavit , of The State Port Pilot Inc., engaged in the pub-
lication of a newspaper known as THE STATE PORT PILOT, pub-
lished, issued and entered as periodicals mail in the City of
Southport, in said County and State; that the notice or other legal
advertisement, a true copy of which is attached hereto, was pub-
lished in THE STATE PORT/ PILOT on the following dates:
and that said newspaper in which said notice, paper, document or
legal advertisement was published was, at the time of each and every
such publication, a newspaper meeting all of the requirements and
qualifications of Section 1-597 of the General Statutes of North
Carolina and was a qualified newspaper within the meaning of
Section 1-597 of the General Statutes of North Carolina.
This the Cr i_ day of 7 , 20C.
i )'7(&' k) mi t (o
(Signature of person making affidavit)
Sworn to and subscribed before me this et day of
,206q.
Notary Public
My commission expires: April 27, 2006.

AFFIDAVIT OF PUBLICATION
STATE OF NORTH CAROLINA
COUNTY OF NEW HANOVER
PUBLIC NOTICE
STATE OF
NORTH CAROLINA
ENVIRONMENTAL
MANAGEMENT
COMMISSION/NPDES UNIT
1617 MAIL SERVICE
CENTER
RALEIGH, NC 27699-1617
NOTIFICATION OF INTENT
TO ISSUE A NPDES
WASTEWATER PERMIT
On the basis of thorough
staff review and applica-
tion of NC General Stat-
ute 143.21, Public law 92-
500 and other lawful
standards and regula-
tions, the North Carolina
Environmental Manage-
ment Commission pro-
poses to issue a National
Pollutant Disch4rge
Elimination System
(NPDES) wastewater dis-
charge permit to the per-
. son(s) listed below effec-
tive\ 45 days from the
publish date of this no-
tice.
publ
This
Written comments re-
garding the proposed
permit will be accepted
until 30 days after the
publish date of this no-
tice. All comments re-
ceived prior to that date
are considered in the fi-
nal determinations re-
garding the proposed
permit. The Director of
the NC Division of Water
Quality may decide to
hold a public meeting for
the proposed permit
should the Division re-
ceive a significant degree
of public interest.
Copies of the draft permit
and other supporting in-
formation on file used to
determine conditions
present in the draft per-
mit are available upon
request and payment of
the costs of reproduction.
Mail comments and/or
requests for information
to the NC Division of Wa-
ter Quality at the above
address or call Ms. Valery
Stephens at (919) 733-
5083, extension 520.
Please include the NPDES
permit number (attached)
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.
Cogentrix Energy, Inc. has
applied for a renewal of
the NPDES permit
(NC0065099) for its
Southport cogeneration
facility in Brunslvick
County. This facility oper-
ates two permitted out -
falls, 001 and 002, both
discharging to the Atlan-
tic Ocean; class SB wa-
ters in the Cape Fear
River Basin. No parame-
ters are water quality lim-
ited at this time, however
this discharge may im-
pact future allocation of
the resource.
Wilmington Northside
WWTP, NPDES Permit
NC0023965, has applied
for renewal and expan-
sion of its permitted dis-
charge to the Cape Fear
River within the Cape
Fear River Basin. The fol-
lowing parameters are
water quality limited:
80D5, TSS, ammonia ni-
trogen (NH3 as N). fecal
Before the undersigned, a Notary Public of Said County and State,
DIANE P. KEENAN
Who, being duly sworn or affirmed, according to the law, says that'he/she is
CLASSIFIED ADVERTISING MANAGER
of THE WILMINGTON STAR -NEWS, INC., a corporation organized and doing business under
the Laws of the State of North Carolina, and publishing a newspaper known as WILMINGTON
MORNING STAR & SUNDAY STAR -NEWS in the City of Wilmington
PUBLIC NOTICE STATE OF NORTH CAROLINA ENVIRONMENTAL MANAGEMENT
COMMISSION/NPDES UNIT 1617 MAIL SERVICE CENTER RALEIGH, NC 27699-1617
NOTIFICATION OF INTENT TO ISSUE A NPDES WASTEWATER PERMIT On the basis
of thorough staff review and application of
was inserted in the aforesaid newspaper in space, and on dates as follows:
5/11x
year aforesaid. ea•'
•
J.
e 4
And at the time of such publication Wilmington Star -News was a newspaper meeting all the
requirements and qualifications prescribed by Sec. No. 1-597 G.S. of N.C.
je0e.Li Li,trx.taA,„
Title: CLASSIFIED ADVER. MGR
worn or affirmed to, andscrid before me this day of
, A.D
In Tjtimony Whereof, I have hereunto set my hand and affixed my);1, the day and
,
Jublic
My commission expires
fi
foregoing affidavit with the advertisement thereto annexed it is adjudged by tho°�id
operly made, and that the summons has been duly and legally served on the defenc�a>if( "%
Clerk of Superior Court

DENR / DWQ / NPDES Unit
FACT SHEET FOR NPDES DRAFT PERMIT
NPDES Permit NC0065099
INTRODUCTION
Cogentrix of North Carolina, Southport Plant (herein called Cogentrix Southport or the permittee)
requires a National Pollutant Discharge Elimination System (NPDES) permit to discharge treated
wastewater to the surface waters of the state. The permittee's 5-year NPDES permit for their Southport
Plant expired July 31, 2002 and they have requested renewal from the Division of Water Quality (the
Division). This Fact Sheet summarizes background information and rationale used by the Division's
NPDES Unit to determine permit limits and monitoring conditions.
FACILITY REVIEW
Facility Description. Cogentrix Southport (Table 1) is a coal-fired, power -generating facility designed to
produce 2,640 megawatts -hours per day. This facility utilizes cooling tower technology and currently
monitors discharge at three outfalls; two internal outfalls (001 and 002) with a discharge line combining
and transporting all treated wastes to a final discharge (Outfall 003). Technically, final Outfall 003 is also
an internal outfall in that it flows to the Brunswick Steam Electric Plant's (BSEP) discharge canal (not
waters of the state) and thence to the Atlantic Ocean. The Permittee monitors wastes generated as coal -
pile runoff, low -volume wastewater, and cooling -tower blowdown covered by federal technology -based
guidelines.
Table 1.
Cogentrix of NC — Southport Plant
acili Information .•
Applicant/Facility Name
Cogentrix of North Carolina / Cogentrix of NC — Southport Plant
Applicant Address
P.O. Box 1153, Roxboro, North Carolina
Facility Address
1281 Cogentrix Drove, Southport, NC 28461
Permitted Flow (cfs)
Not limited
Type of Waste
Industrial process wastewater, Primary SIC Code 4931
Wastewater Codes: Primary 15, 16. Main Treatment Unit Code 515 x 6
Facility Grade/Permit Status
Grade I, Physical — Chemical / Renewal
Related Permits
—
Drainage Basin / County
Cape Fear River Basin / Brunswick County
Miscellaneous
Receiving Stream
Atlantic Ocean
Regional Office
Wilmington
Stream Classification
SB
State Grid /
USGS Topo Quad
L 26 NE/
Southport, NC
303(d) Listed?
Not listed
Permit Writer
Joe R. Corporon
Subbasin
03-06-17
Date:
01 Apr04
Drainage Area (sq. mi.)
Controlled — BSEP canal
.T: -� '
` 1 ' ,
13.d �.�rW� � j�L � : t
, ;�� a.:;. -�---- ° �. ;�.
j"-
-Iii .;+ , x .
Lat. 33° 57' 07" Long. 78° 01' 20"
Summer 7Q10 (cfs)
Ocean Discharge
Winter 7Q10 (cfs)
Q
Ocean Discharge''
30Q2 (cfs)
Ocean Discharge''
Average Flow (cfs)
Ocean Discharge
IWC (%)
Ocean Discharge
'hcct
R..nc\ka! l'i?i.;S Pc•;roil NC0065099
t� t

CORRESPONDENCE AND RECORDS
Verifying Existing Stream Conditions. This facility discharges to the Atlantic Ocean, a Class SB
waterbody downstream of the Cape Fear River Basin. This area is not listed as "impaired" [not listed on
the DWQ 303(d) list].
Effluent Monitoring and Data Review. This permit does not require instream monitoring.
Total Residual Chlorine (TRC). Because this facility discharges to BSEP's discharge canal (not
waters of the state) and because the BSEP's final outfall is monitored for TRC prior to discharging to
the Atlantic Ocean, this permit does not require TRC monitoring.
Waste Load Allocation (WLA). Cogentrix Southport records date from 1985. The Division prepared the
last WLA for Outfalls 001, 002, and 003 in 1996 and developed effluent limits and monitoring
requirements considering applicable federal criteria and effluent canal discharge. The Division views
these limits and monitoring requirements appropriate for renewal except as modified herein (see Renewal
Approach Summary).
Whole Effluent Toxicity (WET) Test. Because this facility discharges to the Atlantic Ocean via
Brunswick Steam Electric Plant's (BSEP) discharge canal (not waters of the state), WET testing is not
required.
Renewal Application and Staff Report. The permittee submitted a renewal application six months prior
to expiration but the Division returned it because of an inappropriate application and insufficient
background data. Division accepted corrections on June 4, 2001. Field Inspector, Steve West, of the
Wilmington Regional Office (WiRO) submitted a Staff Report on September 21, 2001. WiRO found the
facility in compliance with the permit, in good operating condition, and recommended that the NPDES
Unit renew the permit in accordance with the Basin Plan.
RENEWAL APPROACH
The Division judges previous permit limits and monitoring requirements to be appropriate for renewal
considering recent data supplied by the permittee indicating no significant changes in operations except as
noted herein. Current limits and monitoring are based on the application of the Steam Electric Power
Generating Point Source Category (40CFR 423). Under these federal guidelines, the Division considered
the following technology -based regulations applicable to this facility (Tables 2 through 6):
Table 2.
Product
MW Produced
Effluent Guidelines Reference
Electricity (coal-fired steam
electric generating unit).
> 55
megawatt -hours
40 CFR Part 423 - Steam Electric Power
Generating Point Source Category
[)raft Permit iku,_ [a;..
Renewal -- NI)1!1:.S �iitiT;;009
.fin

Table 3.
Internal Outfall 001 -- Coal Pile Runoff, and Low -Volume Wastewater*
Effluent
Parameters
Monthly
Average
Daily Maximum
Applicable
Regulations
TSS
30.0 mg/1
100.0 mg/1
40 CFR.423.12 (b)(3) BPT
Oil and Grease
15.0 mg/I
20.0 mg/1
40 CFR.423.12 (b)(3) BPT
* Low Volume Wastes consist of drains from the demineralizer, boiler blowdown, and
miscellaneous plant sumps.
Additional Intermittent Waste Stream for Pipe Maintenance. In addition to requirements for cooling
tower blowdown at Outfall 002 (Table 4), the permittee has requested permission to discharge intermittent
iron residuals from pipe cleaning maintenance at a volume less than 5,000 gallons per year (see attached
laboratory report). Based on these analyses, the low relative waste volume, and the extreme dilution of this
waste by the canal waters (1,700 MGD), the Division has no objection to this discharge, but will transfer
pH and 126 Priority Pollutants monitoring requirements to Cogentrix's final outfall (see Final Outfall 003).
Table 4.
Internal Outfall 002 -- Cooling Tower Blowdown.
Effluent
= -- Parameters
Monthly
Avera 0..
Daily
Maximum
Applicable
Regulations
Free Available Chlorine
0.2 mg/1
0.5 mg/I
40 CFR 423.13 (d)(1) BAT
Total Chromium
0.2 mg/1
0.2 mg/I
40 CFR 423.13 (d)(1) BAT
Total Zinc
1.0 mg/1
1.0 mg/I
40 CFR 423.13 (d)(1) BAT
126 Priority Pollutants
(applied at Outfall 003)
No Detectable Amount
40 CFR 423.13 (d)(1) BAT
40 CFR 423.13 (d)(2) BAT
40 CFR 423.13 (d)(3) BAT
Final Outfall 003 -- Effluent Canal Not "Waters of the State." There is no need for water -quality -
based permit limits more stringent than technology -based limits because the permittee discharges to the
BSEP discharge canal (not waters of the state) with a final discharge to the Atlantic Ocean. A Reasonable
Potential Analysis was therefore not required to establish pollutants of concern.
RENEWAL SUMMARY
Permit Renewal -- Recommended Changes/Additions
I Parameter
I Outfall
Comments / Renewal Action
TSS j
001
Daily Max raised from 50 mg/L to 100 mg/L, per 40 CFR 423
Total Chromium
002
Daily Max lowered to 0.2 mg/L per 40 CFR 423
Total Copper
002
Deleted from the permit — No water -quality based concerns
Total Barium
002
Deleted from the permit — No water -quality based concerns
126 Priority Pollutant
003
Added to final outfall
Dr:dfl I1:init1adShc.,
NP1)i'S \('0065t ) .

Intake Structure
(flows Southwest)
Cogentrix of North Carolina, Inc.
Southport Plant
Stream Class: SB State Grid/Quad: L 26 NE / Southport, NC
Sub -Basin: 03-06-17 Drainage Basin: Cape Fear River Basin
Receiving Stream: Atlantic Ocean Permitted Flow: Not limited
Cogentrix of NC
Approximate property
boundary
Facility
Location
not to scale
North
NPDES Permit No. NC0065099
Brunswick County

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3 Unit 1 Ash System Vacuum
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5 Rail Car Coal Unloading Hopper
6 Coal pile Stockout Chute
7 Coal. Stockout Pile
8 Coal Stprage Pile
9 Unit 1 Cooling Tower
10 Emergency Diesel Fire Pump
11 Unit 1 Boiler Baghcuse (A,B,C)
12 Emergency Coal Reclaim System Hopper
13 Emergency Oil Trap (Oil/Water Separator)
14 Plant Waste Water Basin
15 Unit 2 Stack
15 Unit 2 Asih Silo
17 Unit 2 Ash System Vacuum Pumps
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. DMR VIOLATIONS for:
Permit: nc0065099 :` DMRs' Between
1 2000 ; and 1
Parameter Names FLOW, BOD,.TS.S, NH;
eglon: %;
Report Date: 09/03/03 Page: 1 of 1
Violation Category limit Violations CG&L REPORT
PERMIT: FACILITY: COUNTY: REGION:
DMR OUTFALL LOCATION PARAMETER
VIOLATION UNIT OF CALCULATED
DATE FREQUENCY MEASURE LIMIT VALUE VIOLATION TYPE VIOLATION ACTION
12/31/69

Municipal Water
Supply
1,928,500
2,000
391,400
1,537,100
Sanitary
to POTW
Demineralizcr
309,300
Consumptive Loss
281,100
46,400
35,750
Boilers
Miscellaneous
Plant Sumps
28,200>
46,400>
Rainfall
49,700
Evaporation
1¼1,380,100
Cooling Tower
157,000
Coal Pile
Runoff
Low Volume
Waste Basin
160 050
NPDES Discharge to
to CP&L Canal >
317,050
Note: All units are in gallons per day.
Actual average monthly discharge for 1996 - 2001 was 186,000 gallons per day.
Cogentrix of North Carolina, Inc. - Southport Plant
Design Water Balance

RE: Status of NC0065099 Renewal
Subject: RE: Status of NC0065099 Renewal
Date: Fri, 28 Mar 2003 12:58:49 -0500
From: "Sawyer, Cheryl" <[e-mail]>
To: "'Jackie Nowell' <[e-mail]>
The septic tank has a drainage field -there is no offsite discharge (other
than the normal type septic field drainage). I will arrange for the
priority pollutant analyses on the combined effluent (Outfall 003). Have a
good weekend. Cheryl Sawyer
1 of 1 3/28/03 1:24 PM

Re: Status of NC0065099 Renewal
Subject: Re: Status of NC0065099 Renewal
Date: Fri, 28 Mar 2003 12:22:21 -0500
From: Jackie Nowell <[e-mail]>
Organization: NC DENR DWQ
To: "Sawyer, Cheryl" <[e-mail]>
Hello Ms. Sawyer, thank you for your quick response. I will fax the
applications to you. An updated priority pollutant analysis is required, so if
that could be submitted it would be greatly appreciated. It could be additional
information or an amendment to the 2001 application. Also, in regards to the
sanitary waste to the septic tank, is that effluent discharged to the WWTP or
discarded in another manner?
Thanks again, Jackie Nowell
"Sawyer, Cheryl" wrote:
> hrs. Nowell, if it would not be too much of an inconvenience, could you fax
> me copies of both applications so I can see what has been submitted and get
> it right. Johnny Hester is no longer with Cogentrix, and Terry Baker is no
> longer at SP.
> 1. We do not discharge sanitary waste to the POTW-we have a septic tank.
> I'll verify the employee numbers.
> 2. I am almost one hundred percent certain that we do not have any
> priority pollutant analyses within your three year window -if some are
> required, let me know and I'll get them done asap (like next week at least
> for getting them taken). As for PP tests, we normally use the allowed caveat
> for cooling tower chemicals (ie. nothing in added chemicals therefore
> nothing out by federal regs). 3. Chromium is not a normal constituent
> in our waste and most analyses that I have seen are at the detection limit.
> The only chromium problem we have had at this facility was due to the use of
> a cleaner that actually destroyed some of our stainless steel equipment
> . That particular waste stream was not added to our discharge though -it was
> hauled off by an approved vendor. We have cleared up those issues with the
> Waste folks a few years ago..
> Thank you for following up on this. I know we are operating on the old
> permit, but the new plant manager is very diligent in these matters and is
> uncomfortable with an expired permit. I'll get you the information
> requested asap. Have a nice weekend.
> Cheryl Sawyer
1 of 1 7/29/03 5:58 PM

file:///Untitled
Hello Ms. Sawyer, thank you for contacting me and I apologize for the delay. I have pulled out the
Cogentrix file and did a preliminary review. We received two copies of the application however they
were different in that varying information was on each one. One was signed by Johnny Hester on May
30th 2001, while the other was unsigned, with Terry Baker's name printed above. there was also
different information in regards to: 1) the maximum number of employees on any given shift, 2) gallons
per operating day of cooling water and process water. One application gave actual numbers for flow
while the other application indicated that separate flow was not available. 3) one indicated that <2000
GPD went to a municipal sewer and the other indicated that <2000 GPD went to a septic tank and 4) the
substances present in the effluent is different on both applications. Please advise as to which of these
applications is accurate for the Cogentrix renewal.
In addition, two water balance diagrams that were submitted do not balance. There is a discrepancy on
the various flows and this needs to be discussed, with an accurate diagram submitted. For example, the
amount of flow coming from the municipal water supply does not balance with the total flow going to
the sanitary, the demineralizer, and the cooling towers. After that, the flows coming from the
demineralizer do not balance. Also, with the March 2002 request for an additional waste stream to be
considered, a diagram should be submitted that would illustrate where this waste stream would be
generated, amount of flow to be generated, and how it would fit into the water balance.
Finally, the priority pollutant data that was submitted is nine years old. If a more recent pollutant data
scan has been done, Cogentrix should submit that as additional information with the application.
I realize that this is a lot of information and please feel free to call me if any further clarification is
needed. (919-733-5083 ext. 512) I attempted to call the numbers listed in your email and did not
receive any answer or voice mail at either number. In fact the cell number did not ring at.
"Sawyer, Cheryl" wrote:
Thank you for your help. I am just trying to follow up on some of the
changes that we had requested (no pH on an internal outfall and some
different language on the prohibition of metal cleaning wastes in an
internal outfall) and to see where this permit is in the re -permitting
process. Please feel free to contact via email or phone [phone] or
7557 434 5931 cell). Have a good weekend. Cheryl Sawyer
312 ? (63
A-2°L
fivil 64- cm'th
2
1 of 1 3/27/03 10:20 AM

Re: [F•wd: Question regarding Permit No. NC0065099]
Subject: Re: [Fwd: Question regarding Permit No. NC0065099]
Date: Tue, 08 Oct 2002 09:57:57 -0400
From: Dave Goodrich <[e-mail]>
To: Bill Reid <[e-mail]>
CC: Bradley Bennett <[e-mail]>, Jackie Nowell <[e-mail]>
Hi, Bill. This is ours. I'll ask Jackie to handle. Hope all is well with you.
Bill Reid wrote:
Bradley/Dave G. - Not sure if this is SW or WW, or both? Hope things are going well. Maybe see you
Wed. or Thur. at the WQ/EMC meetings.
Bill
Dave D. - You may want to set up a return message to folks sending me emails at the ncmail address,
that I no longer work here and/or terminate the address.
Original Message
Subject: Question regarding Permit No. NC0065099
Date: Mon, 7 Oct 2002 15:32:37 -0400
From: "Neff, Rick" <[e-mail]>
To: "'[e-mail]'" <[e-mail]>
Dear Mr. Reid:
Cogentrix of North Carolina's Southport cogeneration plant has an NPDES
permit that includes coal pile runoff into the low volume wastewater system
(for treatment and NPDES monitoring prior to discharge). We are currently
considering burning wood as a supplemental fuel at this facility and under
this plan, the wood would be stored in the existing coal pile area. The
type of wood under consideration includes wood chips and waste chip -board
and/or particle -board. No CCA or creosote treated wood would be used. Our
question is: would the NPDES permit for this facility need to be modified to
store wood (in addition to coal) in the existing coal pile?
Thank you for your attention in this matter,
Rick.
C. Richard Neff, P.E.
Manager, Environmental Affairs
Cogentrix Energy, Inc.
9405 Arrowpoint Boulevard
Charlotte, NC 28273-8110
Phone: [phone]
Facsimile: [phone]
Mobile: [phone]
e-mail: [e-mail]
1 of 1 10/8/02 11:21 AM

Cogentrix
March 24, 2002
Ms. Jackie Nowell
NC DENR
Water Quality — Point Source Branch
1617 Mail Service Center
Raleigh, NC 27699-1617
{Eod
APR - 5 2002
DENR - WATER QUALITY
POINT SOURCE BRANCH
Re: NPDES Permit No. NC0065099
Cogentrix of North Carolina, Inc. — Southport Plant (Brunswick County, NC)
NPDES Permit Renewal
Dear Ms. Nowell:
The NPDES permit renewal application (Short Form C) has been previously submitted
for the above referenced facility, and is currently in the queue for re -issuance in the near
future. Based on our recent conversations with Mr. Steve West of the Wilmington Office
though, we would like to request that an additional waste stream be considered for
inclusion in the description of the flows entering the Low Volume Waste basin outfall,
Outfall 001.
Due to our contractual inability to passivate the iron surfaces of the facility piping
(because of FDA steam use), this facility experiences considerably more iron corrosion
problems than most steam electric plants. Many electric generation facilities routinely
clean the process piping on an annual, or more frequent, basis, but due to the excellence
of our water systems and our maintenance programs, our facility does not. Some metal
cleaning operations, specifically those that use chemical chelating solvents for cleaning
boiler piping, require that the waste stream be further treated due to hazardous or toxic
components, and as such are rightfully banned from discharge in an NPDES-permitted
outfall. We will not and are not contemplating the discharge of this type of waste stream
through the NPDES outfalls.
However not all cleaning operations require the use of a chemical cleaner and do not
result in the generation of a hazardous or toxic waste stream. This is the type of discharge
for which we wish to gain discharge approval. This waste stream will be generated on an
infrequent basis and consists of waste water generated from the non -chemical cleaning
(mechanical cleaning) of process piping. The total volume of the flow is estimated to be
less than 5,000 gallons per year.
Originally when Mr. West was approached a few weeks ago about discharging this water,
we anticipated considerably more flow than what we do now. However because we were
unable to obtain permission to discharge this rust -laden water, the plant devised a water

reuse/reclamation skid that collects the water via gravity drain, settles it in a settling tank
(-1000 gallons), and allows the overflow into another smaller storage tank (— 300
gallons) to be used as the makeup to the pressure washer -like cleaning apparatus. [The
waste water from the current cleaning operation is being hauled off and treated by a
contractor, A & D Environmental Services, Inc.]
This waste stream consists of iron oxides, occluded dirt and other assorted debris in the
case of condenser cleaning (cooling tower/service water process equipment). I am
including the toxicity characteristic leaching procedure (TCLP) analyses that we had
done on the original waste stream from the cleaning operation that has been previously
submitted to Mr. West at the Wilmington office.
Hopefully, this waste stream can be included as an infrequent component in Outfall 001
without having a major impact, i.e. increase, on the number and frequency of analytes
required to be tested for the permit. Currently Outfall 001 has a total suspended solids,
(TSS), testing requirements and limitations which would seem to parallel the
contaminants that could be expected from this operation, and Oil and Grease testing
requirements which would not be expected from this type of operation. We would/could
tailor the permit -required testing on Outfall 001 to coincide with the discharge of this
waste water if this waste stream is permitted to be an infrequent component of the outfall.
Please contact either me or Mr. Johnny Hester (910-739-9641) if you have any questions
or comments regarding this request.
Sincerely,
CheryVG. Sawyer
Manager, Environment, Health and Safety
Attachment
cc. Steve Miller, Plant Manager
Erik Hufham, Operations Manager
Johnny Hester
Rick Neff, Corporate
EHS File: 1.1.2

Mar 21 02 11:09a
p.1
CLIENT: Cogentrix of North Carolina, Inc.
ATTN: Erik Hufham
ADDRESS: P.O. Box 10836
CITY: Southport, NC 28461
PHONE: [phone]
FAX. [phone]
SPECIAL NOTES:
SAMPLE ID: UNIT 2 CONDENSER
SAMPLE NO 02-03933
SAMPLE RECEIPT
DATE: 3/19/02 TIME: 0835
GRAB COLLECTION
DATE: 3/I6/02 TIME: 1? ^^
COLLECTED BY: CLIENT
PICK UP BY: UPS
NUMBER OF CONTAINER
GOOD CONDITION G
North Carolina Certificatio
�REE)D
Parameter
Toxicity Characteristics
Arsenic
Barium
Cadmium
Chromium
Lead
Mercury
Selenium
Silver
EPA
HW Method
No. Number
Leaching Procedure
D004 6010B
D005 601013
D006 6010E
D007 6010B
D008 6010B
D009 7470A
D0I0 6010B
D011 6010E
JRA
QL (mg/L)
0.002
0.005
0.0005
0.001
0.005
0.0002
0.005
0.001
Regulatory
level
(mg/L) Result (mg/L) Analyst/Date/Time
5 < 0.002
100 0.039
< 0.0005
5 0.001
5 < 0.005
0.2 < 0.0002
1 < 0.005
5 < 0.001
NOTE: JRA Quantification Level is the concentration of the lowest calibration standard above zero with a reliable signal.
Reproduction of this report is not permitted, except in full, without written approval from James R Recc & Associates.
FPE 3/20/02 1417
FPE 3/20/02 1417
FPE 3/20/02 1417
FPE 3/20/02 141?
FPE 3/20/02 1417
TLG 3/19/02 1452
FPE 3/20/02 1417
FPE 3/20/02 1417
RESPECTFULLY SUBMITTED
Elaine Claiborne
Laboratory Director
21-Mar-02
James R. Reed & Associates •11864 Canon Blvd., Ste 103. Newport News, VA 23606 • [phone] •Fax: [phone]
Page 1 of 1

Cogentrix
Cogentrix Environmental
Health & Safety
Ms. Valery Stephens
NC DENR
Water Quality — Point Source Branch
1617 Mail Service Center
Raleigh, NC 27699-1617
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MAY 3 0 2001
DEER i`1 :! :i CJ!!LiiY
Re: NPDES Permit No. NC0065099
Cogentrix of North Carolina, Inc. — Southport Plant (Brunswick County, NC)
NPDES Permit Renewal
Dear Ms. Stephens:
The NPDES permit for the above referenced facility expires on November 30, 2001 and
with this letter and attached Short Form C Application, Cogentrix of North Carolina
requests that the permit be renewed. Per our discussions with Ms. Jackie Nowell, we
were informed that the Short Form C application was the proper form to use for the
Southport Plant because the facility discharge is less than one million gallons per day.
The attached application package contains the following:
1. Three copies (one original signature and two copies) of the Short Form C
Application;
2. A facility location map;
3. A plant water balance diagram;
4. A copy of the sludge management plan; and
5. A copy of historic priority pollutant analytical data. Please note that the facility
has no monitoring requirements for the 126 priority pollutants and has
certification for it's chemical supplier that the water treatment chemicals do not
contain priority pollutants.
Please contact either me or Mr. Johnny Hester if you have any questions or comments
regarding this application package.
Sincerely,
C. Richard Neff, P.E.
Manager, Environmental Affairs
pc: Terry Baker (Southport Plant Manager)
Johnny Hester
Cheryl Sawyer
G:Dev/Admin/Neff/NPDES Cover Letter

SOC PRIORITY PROJECT: NO
To: Permits and Engineering Unit
Water Quality Section
Attention: Jackie Nowell
Date: 9/17/01
NPDES STAFF REPORT AND RECOMMENDATION
County: Brunswick
Permit No. NC0065099
PART I - GENERAL INFORMATION
Facility and Address:
Facility: Cogentrix of North Carolina, Inc. -Southport Plant
1281 Cogentrix Drive
Southport, NC 28461
Mailing: P.O. Box 10836
Southport, NC 28461
2. Date of Investigation: 9/1 1 /01
3. Report Prepared by: Steve West
4. Persons Contacted and Telephone Number:
Johnny Hester, Director of Environment, Health and Safety [phone]
Eric Hufham, ORC [phone]
Steve Weber, operator [phone]
5. Directions to Site: From Wilmington, take Highway 74/76 west and exit at
Highway 133 in Leland. Follow 133 south toward Southport for approximately
20 miles and turn left on Jabbertown Rd in Southport. Travel one mile and
turn left on E. Moore Street. Plant entrance is 1 mile on the left.
6. Discharge Point(s), List for all discharge points:
Latitude: 33° 56' 58" Longitude: 78° 01' 20"
U.S.G.S. Quad No: 5351 I NE U.S.G.S. Quad Name: Southport, NC
7. Site size and expansion area consistent with application ? N/A
8. Topography (relationship to flood plain included): The site is flat and ranges from
25 to 30 feet above msl. The site is not within the 100 year flood plain.

9. Location of nearest dwelling: There are several dwellings just outside the plant
perimeter.
10. Receiving stream or affected surface waters: Atlantic Ocean via CP&L Effluent
Channel.
a. Classification: Class "SB" waters
b. River Basin and Subbasin No.: 030617
c. Describe receiving stream features and pertinent downstream uses:
CP&L cooling water effluent canal to Atlantic Ocean
PART II - DESCRIPTION OF DISCHARGE AND TREATMENT WORKS
1. a. Volume of wastewater to be permitted: No limit recommended
b. What is the current permitted flow limit? No limit
c. Actual treatment capacity of the current facility? The facility does not have
a design treatment capacity.
d. Date(s) 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: Low volume waste passes through two
parallel settling basins. Cooling tower blowdown mixes with the basin
effluent and the final pH is adjusted prior to discharge.
f. Please provide a description of proposed wastewater treatment facilities:
No changes planned.
g. Possible toxic impacts to surface waters: Minimal amounts of chlorine,
chromium, copper, mercury, and zinc have been detected in the effluent.
h. Pretreatment Program (POTWs only): N/A
2. Residuals handling and utilization/disposal scheme:
Solids settled in the settling basins are periodically removed. It was discovered
during the site visit that residuals are occasionally disposed of through S&B
Maintenance, permit no. WQ0000783. A review of this permit file found that
S&B is not permitted to remove residuals from this facility. The permittee has
been instructed not to use S&B for future disposal.
3. Treatment plant classification: Class II Physical/Chemical

4. SIC Code(s): 4931, 4911
Wastewater Code(s) Primary: 15 Secondary: 16
Main Treatment Unit Code: 525X6
PART III - OTHER PERTINENT INFORMATION
1. Is this facility being constructed with Construction Grant Funds or are any public
monies (municipals only) involved? No
2. Special monitoring or limitations (including toxicity) requests: It is unclear why
this facility is required to sample at three different locations. The "outfalls"
identified in the permit are not true outfalls. Nos. 001 and 002 combine to form r
003 before discharging into the CP&L discharge canal. The site visit confirmed
that the 003 location is accessible to sampling equipment, and that the
sampling location is representative of the entire discharge entering the receiving
canal. Both the low volume waste and cooling tower discharge on a daily basis
and are combined at outfall 003. It is recommended that monitoring
requirements and limitations for 001 and 002 be combined at 003. Since the
cooling tower blowdown is not continuous, it is recommended the permit
require that samples be collected only on days when cooling water is being
discharged.
3. Important SOC, JOC or Compliance Schedule dates: None
4. Alternative Analysis Evaluation: Not performed. The existing discharge
option appears to be the most environmentally and economically -sensible
option for disposal.
5. Other Special Items: None
PART IV - EVALUATION AND RECOMMENDATIONS
Cogentrix Energy operates the Southport cogeneration facility
(electricity/steam), producing a peak output of 2640 MW-h electricity and sells
steam to the adjacent Archer Daniels Midland Company. Wastestreams and
average flow rates are as follows:
Boiler blowdown — 30,900 gpd
Miscellaneous plant sumps — 46,400 gpd
Intake water demineralizer backwash (anion/cation exchange, carbon) — 33,000
Coal pile runoff — variable
Cooling tower blowdown — 53,000 gpd

All streams except the cooling tower blowdown are routed to two parallel
rectangular settling basins. Typically only one basin is used at a time and the
other is kept empty for emergency situations. Basin discharge and cooling
tower blowdown are combined, and the pH is adjusted prior to the final
discharge pump station.
There have been no permit limit violations over the past year. The pH
occasionally skirts the upper limit of 8.5.
It is recommended the permit be reissued to Cogentrix Energy in accordance
with the CFR Basinwide plan.
Signature of Report Preparer
)l7 ibt
Date
Water Quality Regional Supervisor Date
cc: WiRO NPDES Pending Permit File
Central Files
, `Z CC I

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Cogenttix of Werth Carolina, Inc. - Southport Plant
Design Water Balance
Co
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46.490),
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317,050
/kit= Allatoib am in pesos per day.
Acton' =mg: toottily &Wants for 1996 3001 was 116.600 gallant per day.

Cogentrix of North Carolina, Inc.
Southport Plant
SLUDGE MANAGEMENT PLAN
I. Introduction
The Sludge Management Plan has been developed by the Environment, Health
and Safety office to provide guidance to the operating facilities for meeting the
regulatory requirements governing proper handling and disposal of wastewater
treatment sludges i.e. low volume waste basin sludges. This plan was initially
addressed in the Company's Best Management Practices — 1987 (BMP). This revised
plan is to be used as a starting point for the handling and disposal practices for all
sludges generated on site with specific modifications as required.
II. Waste Treatment Basin Operation Guidelines
A. The sludge depth in the waste basins is to be periodically monitored to
ensure reasonable waste detention times and no suspended solids carry
over in the final effluent.
B. The frequency of sludge disposal is determined on an 'as needed' basis, or
by regulatory requirement or directive.
C. The need for sludge disposal is determined by the Plant Manager with the
assistance of the operator in responsible charge (ORC) and/or the EHS
staff.
III. Procedure for Handling and Disposal of Waste Basin Sludge
A. Cleaning of Waste Basins
i. Once the determination has been made to clean the waste
basins, only one basin is to be cleaned at a time to ensure
proper control of process wastewater and any rainfall.
ii. The waste basin to be cleaned is isolated i.e. the influent waste
streams are diverted from the influent channel into the other
basin. A portable pump is to be used to pump the supernatant
from the isolated basin to the one 'in service'.
iii. The sludge in the isolated waste basin may be allowed
temporarily to dry in place to aid in handling as needed.
iv. The sludge can be transferred to the final dewatering area by
front-end loader, or a vacuum truck, or by pump. Sludge
transfer is to be accomplished with particular attention paid to
prevent sludge from contaminating plant grounds.

Cogentrix of North Carolina, Inc.
Southport Plant
SLUDGE MANAGEMENT PLAN
I. Introduction
The Sludge Management Plan has been developed by the Environment, Health
and Safety office to provide guidance to the operating facilities for meeting the
regulatory requirements governing proper handling and disposal of wastewater
treatment sludges i.e. low volume waste basin sludges. This plan was initially
addressed in the Company's Best Management Practices — 1987 (BMP). This revised
plan is to be used as a starting point for the handling and disposal practices for all
sludges generated on site with specific modifications as required.
II. Waste Treatment Basin Operation Guidelines
A. The sludge depth in the waste basins is to be periodically monitored to
ensure reasonable waste detention times and no suspended solids carry
over in the final effluent.
B. The frequency of sludge disposal is determined on an 'as needed' basis, or
by regulatory requirement or directive.
C. The need for sludge disposal is determined by the Plant Manager with the
assistance of the operator in responsible charge (ORC) and/or the EHS
staff.
III. Procedure for Handling and Disposal of Waste Basin Sludge
A. Cleaning of Waste Basins
i. Once the determination has been made to clean the waste
basins, only one basin is to be cleaned at a time to ensure
proper control of process wastewater and any rainfall.
ii. The waste basin to be cleaned is isolated i.e. the influent waste
streams are diverted from the influent channel into the other
basin. A portable pump is to be used to pump the supernatant
from the isolated basin to the one 'in service'.
iii. The sludge in the isolated waste basin may be allowed
temporarily to dry in place to aid in handling as needed.
iv. The sludge can be transferred to the final dewatering area by
front-end loader, or a vacuum truck, or by pump. Sludge
transfer is to be accomplished with particular attention paid to
prevent sludge from contaminating plant grounds.