NC0043176_Permit (Issuance)_20120706

NPDES DOCUHENT SCANNIN. COVER SHEET
NPDES Permit:
NC0043176
Dunn WWTP
Document Type:
Permit Issuance s
Wasteload Allocation
Authorization to Construct (AtC)
Permit Modification
Complete File - Historical
Engineering Alternatives (EAA)
Correspondence
Owner Name Change
Instream Assessment (67b)
Speculative Limits
Environmental Assessment (EA)
Document Date:
July 6, 2012
This document is printed on reuse paper - ignore any -
content on the re -sr -ex -se side

ern
F1bENR
North Carolina Department of Environment and Natural Resources
Division of Water Quality
Beverly Eaves Perdue Charles Wakild, P. E. Dee Freeman
Govemor Director Secretary
July 6, 2012
Mr. Dean Gaster, Utilities Director
City of Dunn
P.O. Box 1065
Dunn, North Carolina, 28335
Subject Issuance of NPDES Permit
NC0043176
Dunn WWTP
Harnett County
Facility Class IV
Dear Mr. Gaster:
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 October 15,
2007 (or as subsequently amended).
The following changes have been incorporated into this permit renewal:
• A quarterly monitoring for total mercury was added to the permit based on the results of the statistical
analyses of the effluent data. In addition, the Mercury TMDL reopener condition was added to the
permit to notify you about upcoming.TMDL MDL implementation.
• The description of the treatment system was updated.
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 (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
1617 Mail Service Center, Raleigh, North Carolina 27699-1617
Location: 512 N. Salisbury St Raleigh, North Carolina 27604
Phone: [phone] FAX: [phone]
Internet www.ncwateruual tv.orq
l_ 9ne Cat'OI1T18
7VaturaIIji
An Equal Opportunity 1 Affirmative Action Employer

S
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].
cc: Central Files
NPDES Files
Fayetteville Regional Office / Surface Water Protection Section
Aquatic Toxicology Unit (e-copy)
ESS/Basin Coalition Coordinator (e-copy Carrie Ruhlman and Steve Kroeger)
EPA Region IV (e-copy)

Permit NC0043176
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES
DIVISION OF WATER QUALITY
PERMIT
TO DISCHARGE WAS'IEWA'I'ER 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, the •
City of Dunn
is hereby authorized to discharge wastewater from a facility located at the
Black River WWTP
Susan Tart Road
Harnett 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, II, III and IV hereof.
This permit shall become effective August 1, 2012.
This permit and authorization to discharge shall expire at midnight on September 30, 2016.
Signed this day July 6, 2012.
do* arles Wakild, P.E. Director
Division of Water Quality
By Authority of the Environmental Management Commission

Permit NC0043176
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 exdusive authority
to operate and discharge from this facility arises under the permit conditions, requirements, terms, and provisions
included herein.
The City of Dunn is hereby authorized to:
1. Continue to operate a.3.75 MGD wastewater treatment facility located at the Black River
WWTP on Susan Tart Road near Dunn in Harnett County. The facility includes the
following treatment components:
• Influent pumps
• Equalization tank (3,000,000 gallons)
• Automatic bar screen
• Aerated grit removal
• Influent flow measurement
■ Aeration basins- 4 cells
• Three final clarifiers
■ Chlorination (12% sodium hypochlorite liquid)
■ Dechlorination (sodium bisulfite liquid)
• Dual chlorine contact tanks
• Effluent pumps
• Effluent flow meter
■ Cascade discharge
• Sludge handling including Rotary Drum Thickener, aerobic sludge digester, aerated
sludge holding tank, and sludge drying beds (optional use)
2. Discharge from said treatment works at the location specified on the attached map into
the Cape Fear River, classified WS-V waters in the Cape Fear River Basin.

Receiving Stream: Cape Fear River
Stream Class: WS-V
Latitude: 35° 17' 31"N
Longitude: 78° 41' 09" W
Drainage Basin: Cape Fear River
Sub -Basin: 03-06-15
not to scale
NPDES Permit No. NC0043176
Harnett County

• Permit NC0043176
A. (1) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS
During the period beginning on the effective date of the permit and lasting until expiration, the Permittee is
authorized to discharge treated wastewater from Outfall 001. Such discharges shall be limited and monitored by
the Permittee as specified below:
• •
'
PARAMETER
. ` DISCHARGE LIMITATONS
' 'MONYTO'G REQUIREMENTS "' '
Monthly
' Average'
_.
W ckly,
Average
Daily r
Maxunum
-
,. Measurement
Frequency
. , 'le--
1
. Sample
Type
.: - ..
.� , Sample,Location1
'
ow
3.75 MGD
Continuous
Recording
Influent or Effluent
'BOD, 5-day, 20°C 2
(April 1— October 31)
12.0 mg/L
18.0 mg/L
Daily
Composite
Influent and Effluent
40D, 5-day, 20°C
(November 1— March 31)2
24.0 mg/L
g
36.0 m /L
g
'
DailyComposite
p
Influent and Effluent
Total Suspended Solids2
30.0 mg/L
45.0 mg/L
•
Daily
Composite
Influent and Effluent
,NH3 as N
(April 1— October 31)
2.0 mg/L
6.0 mg/L
Daily
Composite
Effluent
NH3 as N
(November 1— March 31)
4.0 mg/L
12.0 mg/L
Daily
Composite
Effluent
'Dissolved Oxygen
Daily average > 5.0 mg/L
Daily
Grab
Effluent
decal Coliform
(9,eometric mean)
200/100mL
400/100mL
Daily
Grab
Effluent
Total Residual Chlorine3
28 pg1L
Daily
Grab
Effluent
,emperature
Daily
Grab
Effluent
/TotPhosphorus
Monthly
Composite
Effluent
AN (mg/L)
Monitor and report
Monthly
Composite
Effluent
'l 1�03-N + NO2-N (mg/L)
Monitor and report
Monthly
Composite
Effluent
__Total Nitrogen4
Monthly
Composite
Effluent
Chronic Toxicity5
-
Quarterly
Composite
Effluent
-pH6
> 6.0 and < 9.0 standard units
Daily
Grab
Effluent
erature7
See note 7
Grab
Upstream & Downstream
-Dissolved Oxygen?
See note 7
Grab
Upstream & Downstream
Total Mercury8 .
Quarterly
Grab
Effluent
NOTES:
1- Upstream = at NC Highway 217. Downstream = approximately 1400 feet below discharge.
2. • The monthly average effluent BOD and Total Suspended Solids concentrations shall not exceed 15% of the respective
influent value (85% removal).
3. Limit and monitoring requirements apply only if chlorine is added for disinfection. The Division shall consider all effluent
TRC values reported below 50 µg/L to be in compliance with the permit. However, the Permittee shall continue to record
and submit all values reported by a North Carolina certified laboratory (including field certified), even if these values fall
below 50 µg/L.
4. TN = TKN + NO3-N + NO2-N, where TN is Total Nitrogen, TKN is Total Kjeldahl Nitrogen, and NO3-N and NO2-N
are Nitrate and Nitrite Nitrogen, respectively.
5. Chronic Toxicity (Ceriodaphnia) limit at 1% with testing in March, June, September, and December (see A. (2)).
6. Instream monitoring shall be waived as long as the permittee maintains membership in the Middle Cape Fear River Basin
Association (MCFRBA), which conducts comprehensive instream monitoring. If the permittee cancels membership in the
MCFRBA, the facility shall begin collecting the listed instream samples immediately at a • frequency of 3/week (June -
September) and weekly (October -May).
7. Facility shall employ method 1631E for mercury analysis.
There shall be no discharge of floating solids or visible foam in other than trace amounts.

Permit NC0043176
A. (2) CHRONIC TOXICITY PERMIT LIMIT (Quarterly) — OUTFALL 001
The effluent discharge shall at no time exhibit observable inhibition of reproduction or significant mortality to
Ceriodaphnia dubia at an effluent concentration of 1.0%.
The permit holder shall perform at a minimum, quarterly monitoring using test procedures outlined in the "North
Carolina Ceriodapbnia Chronic Effluent Bioassay Procedure," Revised February 1998, or subsequent versions or "North
Carolina Phase II Chronic Whole Effluent Toxicity Test Procedure" (Revised -February 1998) or subsequent versions.
The tests will be performed during the months of March, June, September and December. Effluent sampling for
this testing shall be performed at the NPDES permitted final effluent discharge below all treatment processes.
If the test procedure performed as the first test of any single quarter results in a failure or ChV below the permit limit,
then multiple -concentration testing shall be performed at a minimum, in each of the two following months as
described in "North Carolina Phase II Chronic Whole Effluent Toxicity Test Procedure" (Revised -February 1998) or
subsequent versions.
The chronic value for multiple concentration tests willbe determined using. the geometric mean of the highest
concentration having no detectable impairment of reproduction or survival and the lowest concentration that does
have a detectable impairment of reproduction or survival. The definition of "detectable impairment," collection
methods, exposure regimes, and further statistical methods are specified in the "North Carolina Phase II Chronic
Whole Effluent Toxicity Test Procedure" (Revised -February 1998) or subsequent versions.
All toxicity testing results required as part of this permit condition will be entered on the Effluent Discharge
Monitoring Form (MR-1) for the months in which tests were performed, using the parameter code TGP3B for the
pass/fail results and THP3B for the Chronic Value. Additionally, DWQ Form AT-3 (original) is to be sent to the
following address:
Attention: NC DENR / DWQ / Environmental Sciences Section
1621 Mail Service Center
Raleigh, North Carolina 27699-1621
Completed Aquatic Toxicity Test Forms shall be filed with the Environmental Sciences Section no later than 30 days
after the end of the reporting period for which the report is made.
Test data shall be complete, accurate, include all supporting chemical/physical measurements and all
concentration/response data, and be certified by laboratory supervisor and ORC or approved designate signature.
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 Section at the address cited
above.
Should the permittee fail to monitor during a month in which toxicity monitoring is required, monitoring will be
required during the following month.
Should any test data from this monitoring requirement 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 indude
alternate monitoring requirements or limits.
NOTE: Failure to achieve test conditions as specified in the cited document, such as minimum control organism
survival, minimum control organism reproduction, 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. (3) PERMIT RE -OPENER: MERCURY TMDL IMPLEMENTATION
The Division may re -open the permit to implement the requirements of the Mercury TMDL.

Permit NC0043176
A. (4) EFFLUENT POLLUTANT SCAN
The Permittee shall perform a total of three (3) Effluent Pollutant Scans for all parameters listed below. The analytical
methods shall be in accordance with 40 CFR Part 136 and shall be sufficiently sensitive to determine whether parameters
are present in concentrations greater than applicable standards and criteria. Sampling dates shall represent seasonal
variation. Unless otherwise indicated, metals shall be analyzed as "total recoverable."
Ammonia (as N)
Chlorine (total residual, TRC)
Dissolved oxygen
Nitrate/Nitrite
Kjeldahl nitrogen
Oil and grease
Phosphorus
Total dissolved solids
Hardness
Antimony
Arsenic
Beryllium
Cadmium
Chromium
Copper
Lead
Mercury (EPA Method 1631E)
Nickel
Selenium
Silver
Thallium
Zinc
Cyanide
Total phenolic compounds
Volatile organic compounds:
Acrolein
Acrylonitrile
Benzene
Bromoform
Carbon tetrachloride
Chlorobenzene
Chlorodibromomethane
Chloroethane •
2-chloroethylvinyl ether
Chloroform
Dichlorobromomethane
1,1-dichloroethane
1,2-dichloroethane
Trans-1,2-dichloroethylene
1,1-dichloroethylene
1,2-dichloropropane
1,3-dichloropropylene
Ethylbenzene
Methyl bromide
Methyl chloride
Methylene chloride
1,1,2,2-tetrachloroethane
Tetrachloroethylene
Toluene
1,1,1-trichloroethane
1,1,2-trichloroethane
Trichloroethylene
Vinyl chloride
Acid -extractable .compounds:
P-chloro-m-cresol
2-chlorophenol
2,4-dichlorophenol
2,4-dimethylphenol
4,6-dinitro-o-cresol
2,4-dinitrophenol
2-nitrophenol
4-nitrophenol
Pentachlorophenol
Phenol
2,4,6-trichlorophenol
Base neutral compounds:
Acenaphthene
Acenaphthylene
Anthracene
Benzidine
Benzo(a)anthracene
Benzo(a)pyrene
3,4 benzofluoranthene
Benzo(ghi)perylene
Benzo(k)fluoranthene
Bis (2-chloroethoxy) methane
Bis (2-chloroethyl) ether
Bis (2-chloroisopropyl) ether
Bis (2-ethylhexyl) phthalate
4-bromophenyl phenyl ether
Butyl benzyl phthalate •
2-chloronaphthalene
4-chlorophenyl phenyl ether
Chrysene
Di-n-butyl phthalate
Di-n-octyl phthalate
Dibenzo(a,h)anthracene
1,2-dichlorobenzene
1,3-dichlorobenzene
1,4-dichlorobenzene
3,3-dichlorobenzidine
Diethyl phthalate
Dimethyl phthalate
2,4-dinitrotoluene
2,6-dinitrotoluene
1,2-diphenylhydrazine
Fluoranthene
Fluorene
Hexachlorobenzene
Hexachlorobutadiene
Hexachlorocyclo-pentadiene
Hexachloroethane
Indeno(1,2,3-cd)pyrene
Isophorone
Naphthalene
Nitrobenzene
N-nitrosodi-n-propylamine
N-nitrosodimethylamine
N-nitrosodiphenylamine
Phenanthrene
Pyrene
1,2,4-trichlorobenzene
Reporting. The effluent pollutant scan shall be performed once/year during 2013, 2014, and 2015, and test results
shall be reported to the Division on DWQ Form -A MR PPA1 or in a form approved by the Director by December 31st
of each designated sampling year. The report shall be submitted to the following address: NC DENR / DWQ /
Central Files, 1617 Mail Service Center, Raleigh, North Carolina 27699-1617.

Co 14 c144
Chernikov, Sergei
From: Pamala Myers [[e-mail]]
Sent: Thursday, June 28, 2012 10:47 AM
To: Chernikov, Sergei; Belnick, Tom
Cc: [e-mail]; Mark Nuhfer
Subject: Completion of extended review for City of Dunn WWTP, NC0043176.
Sergei,
After further review of this draft permit and the condition's provided in the document we have completed our extended
review and have no comments.
Subject: No Comment for Draft National Pollutant Discharge Elimination System Permit Review
City of Dunn Wastewater Treatment Plant (NC0043176)
Dear Mr. Poupart:
In accordance with the EPA/NC Memorandum of Agreement, we have completed our review of the draft
National Pollutant Discharge Elimination System (NPDES) permit referenced above and initially received on
April 30, 2012. An extension of review letter was then sent on May 23, 2012. We have concluded our review
and have no comments to the proposed conditions. The EPA requests that we be afforded an additional review
opportunity only if significant changes are made to the draft permit prior to issuance, or if significant objections
to the draft permit are received. Otherwise, please send Region 4 one copy of the final permit when issued with
a signed cover letter. If you have any questions, please call me at [phone] or send me an email at
[e-mail].
Sincerely,
Pamala Myers
404.562.9421
myers. pamala(W epa.gov
Environmental Engineer and Technical Advisor I Pollution Control and Implementation Branch
Water Protection Division I Municipal and Industrial NPDES Section
U.S. EPA, Region 4 161 Forsyth St. SW I Atlanta, GA 30303
1

NIP
.,-"jA TFs_
UNITED STATES ENVIRONMENTAL PROTECTION AGENCY
'� :CZREGIONREGION 4
o �r� Q ATLANTA FEDERAL CENTER
% P2 61 FORSYTH STREET
'Lrq< PRO1 ATLANTA, GEORGIA 30303-8960
MAY 2 3 2012
Mr. Jeff Poupart
Supervisor, NPDES Unit
North Carolina Department of Environment
and Natural Resources
Division of Water Quality
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
Subject: Notice of 90-Day Extension for Review of draft permit for the
City of Dunn Wastewater Treatment Plant
Permit No. NC0043176
This letter is to notify you that the Environmental Protection Agency will need additional time to
complete its review of the draft National Pollutant Discharge Elimination System (NPDES) permit for
the City of Dunn (Permit No. NC0043176). This draft permit was received in our office on April 30,
2012. In accordance with the North Carolina/EPA Memorandum of Agreement and provided by 40
Code of Federal Regulations § 123.44(a), the EPA may use up to the full 90-day review period from the
date of receipt to review this draft NPDES permit. The EPA Region 4 will make every effort to provide
any comments or objections before July 30, 2012, when the 90-day review period ends.
If you have any questions, please call me or have your staff contact Ms. Pamala Myers at
[phone].
cc: Mr. Dean Gaster
Utilities Director
City of Dunn
Sincerely,
Christopher B. Thomas, Chief
Pollution Control and Implementation Branch
Water Protection Division
�MAY252012
DENR-V,'ATER QUALITY
Internet Address (URL) • http://www.epa.gov
Recycled/Recyclable • Printed with Vegetable Oil Based Inks on Recycled Paper (Minimum 30% Postconsumer)

STATE OF NORTH CAROLINA
COUNTY OF HARNETT
In the Matter of:
Public Notice
Wastewater Permit
4/27,2012
I, Donna Bass, being duly sworn, say: that I am CLASSIFIED CLERK, of
THE DAILY RECORD, a newspaper published in Dunn, Harnett County,
North Carolina, and the attached clipping is a copy of the Notice published
in said newspaper for 1 day(s), as follows:
4/27, 2012
as required by law in the above entitled suit.
This newspaper is qualified for legal advertising in accordance with
G.S. 1-597 & 1-598.
fv.)
Classified Clerk, THE DAILY RECORD
Subscribed and sworn to before me, this
3/ dayof',2012.
(ZCct6 &09
My
, Notary Public

Public Notice
North Carolina Environmental Management Commission/NPDES Unit
1617 Mail Service Center
Raleigh, NC 27699-1617
Notice of Intent to Issue a NPDES Wastewater Permit
The North Carolina Environmental Management Commission proposes to
issue a NPDES wastewater discharge permit to the person(s) listed below.
Written comments regarding the proposed permit will be accepted until 30
days after the publish date of this notice. The Director of the NC Division of
Water Quality (DWQ) may hold a public hearing should there be a signifi-
cant degree of public interest. Please mail comments and/or information
requests to DWQ at the above address. Interested persons may visit the
DWQ at 512 N. Salisbury Street, Raleigh, NC to review information on file.
Additional information on NPDES permits and this notice may be found on
our website: http://portal.ncdenr.org/web/wq/swp/ps/npdes/calendar, or by
calling [phone].
The City of Dunn requested renewal of permit NC0043176 for Dunn WWTP
in Harnett County; this facility discharge is treated municipal wastewater to
Cape Fear River, Cape Fear River Basin.
Harnett County has applied for renewal of NPDES discharge permit
NC0088366 for the South Harnett County Regional WWTP which discharg-
es treated domestic wastewater to Lower Little River in the Cape Fear River
Basin.
4/27, 2012

MEMORANDUM
To:
From:
Subject:
April 25, 2012
Debra Benoy, Regional Engineer
NC DENR / DWR / Public Water Supply Section
Fayetteville Regional Office
Sergei Chernikov, Environmental Engineer II, Complex NPDES Unit,
Division of Water Quality (fax-919-807-6495)
Review of the discharge locations for the following:
Review of Draft NPDES Permit 43176
Dunn WWTP
Harnett County
Please indicate below by May 28, 2012 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:
X_ 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 Winston Cole Date: 4/26/12
cc: file

DENR/DWQ
FACT SHEET T FOR NPDES PERMIT DEVELOPMENT
NPDES No. NC0043176
Facility Information
Applicant/Facility Name:
City of Dunn, Dunn WWTP
Applicant Address:
P.O. Box 1065, Dunn, North Carolina, 28335
Facility Address:
Susan Tart Road, Dunn, NC 28335
Permitted Flow
3.75 MGD
Type of Waste:
Domestic
Facility/Permit Status:
Renewal
County:
Harnett
Miscellaneous
Receiving Stream:
Cape Fear River
Regional Office:
Fayetteville
Stream Classification:
WS-V
USGS Topo Quad:
F24SW
303(d) Listed:
Yes (Hg,
statewide)
Permit Writer:
Sergei Chernikov, Ph.D.
Subbasin:
03-06-15
Date:
April 18, 2012
Stream index:
18-(20.7)
)
Drainage Area (mi2):
3464
Summer 7Q10 (cfs)
586.E
Winter 7Q10 (cfs):
Average Flow (cfs):
3601
IWC (%) © 3.75 MGD:
1
SUMMARY
'The City of Dunn operates a 3.75 MGD facility that serves approximately 9, 263 people, it has a separate
sewer collection system. The facility has no pretreatment program.
COMPLIANCE SUMMARY
Data was reviewed for 2007-2011. The facility received two NOVs during the review period: 07/07/2010 —
flow, 02/07/07 — pH..
Whole Effluent Toxicity - The permit requires quarterly chronic effluent toxicity test (Ceriodaphnia) at
1.0 %. The facility passed all the toxicity tests.
The latest Compliance Evaluation Inspection conducted on 03/02/2011 determined that the facility is in
compliance.
INSTREAM MONITORING
This facility is required to monitor dissolved oxygen and temperature. These monitoring is waved since
they participate in the Cape Fear Basin Association.
PROPOSED CHANGES
• A quarterly monitoring for total mercury was added to the permit based on the results of the statistical
. analyses of the effluent data. In addition, the Mercury TMDL reopener condition was added to the
permit to notify the permittee about upcoming TMDL implementation.
• The description of the treatment system was updated.
PROPOSED SCHEDULE FOR PERMIT ISSUANCE
Draft Permit to Public Notice:
Permit scheduled to issue:
April 25, 2012.
August 24, 2012
Fact Sheet
N I' D!S Renewal NC0043176
Page 1

STATE CONTACT
If you have any questions on any of the above information or on the attached permit, please contact
Sergei Chernikov at [phone] or sergei.chernikov©ncdenr.gov.
REGIONAL OFFICE COMMENTS
NAME: DATE:
Fact Sheet
NPDE S Renewal NC004 176
Pane 2
4

Whole Effluent Toxicity Testing Self -Monitoring Summary
FACILITY REQUIREMENT
YEAR JAN FEB MAR APR MAY
April 17, 2012
AUG SEP OCT NOV DEC
Duke Power -McGuire 00S chr lint: 1.4% Ceri7dPF 2008 — Pass
NC0024392/005 Begin:4/1/2010 Frequency: Q Feb May Aug Nov + NonComp:Single 2009 — Pass
County: Mecklenburg Region: MRO Subbasin: CTB33 2010 — Pass
PF: 0.754 Special 2011 — Pass
7Q10: 80.0 IWC(%) 1.4 Order: 2012 — Pass
Pau — — Pass — — Pass
— — Pass — — Pass — — Pass -
- — Pass — — Pass — — Pass -
- — Pass — — H — — H Pass
Duke Power -River Bend 002 chr lim: 10%
NC0004961/002 Begin-3/1/2011 Frcqucncy: Q Jan Apr Jul Oct
County: Gaston Region: MRO Subbasin: CTB33
PF: NA Spacial
7Q10: 80.0 IWC(%) 10.36 Order:
Ceri7dPF
+ NonComp:Single
tit 2008 Pass — — Invabd,Pass —
2009 Pass — — Pass —
2010 Pass — — Pass —
2011 Pass — — Pass —
2012 Pass
Pass
Pass
Pass
Pan
Pass
Pass
Pass
Pass
Dunrr/BlackrivcrWWTP chi lim: I%
NC0043176/001 Begin 2/1/2007 Frequency: Q Mar Jun Sep Dec
County: Haman Region: FRO Subbasin: CPF07
PF: 3.75 Special
7QI0 586.6 IWC(%) 1.0 Omer:
Ceri7dPF 2008 — — Pass — — Pass — — Pass — — Pass
+ NonComp:Single 2009 — — Pass — — Pass — — Pass — — Pass
2010 — — Pass.>2.0(P) — — Pass >2.0(P) — — Pass,>2.0(P) — — Pasa >2.0(P)
2011 — — Pass — — Pass — — Pass — — Pass
2012 — —
Dupont - Fayetteville Works chr lint: 3.3%
NC0003573/001 Begin 3/1/2012 Frequency: Q Feb May Aug Nov
County: Bladen Region: FRO Subbasin: CPF16
PF: 17 Special
7Q10: 791.0 IWC(%) 3.3 Order:
Ceri7dPF 2008 — Pass — — Pass — — Pass — — Pass
+ NonComp:Single 2009 — Pass — — Pass — — Pass — — Pass
2010 — Pass — — Pass — — Pass — — Pass
2011 — Pass — — Pass — — Pass — — Pass
2012 — Fail
Durham County Triangle WWTP chi lim: 90%
NC0026051/001 Begin:12/1/2011 Frequency: Q Feb May Aug Nov
County: Durham Region: RRO Subbasin: CPF05
PF: 12.0 Spacial
7Q10: 0.0 IWC(%) 100 Order:
Ceri7dPF tF 2003
+ NonComp:Single 2009 --
2010
2011 —
2012 82.16
Pass — — Pass —
Invalid — — Pass —
Pass — — Pass>100(P) >100(P)
Pass — — Pass —
Pass(s)
>100(P)
Pass —
Pass —
Pass>100(P) —
Pass —
Pass
Pass
Pass
Fail
>100
Durham-Northsidc WWTP chr lim: 90•/.
NC0023841/001 Begin 6/1/2008 Frequency: Q Jan Apr Jul Oct
County: Durham Region: RRO Subbasin: NEU01
PF: 20.0 special
7Q10: 0.075 IWC(%) 99.5 Order
Ccri7dPF V 2003 Pass — — Pass — — Pass — Pass
+ NonComp:Single 2009 Pass — — Pass — — Pass.Pass — — Pass
2010 Pass — — Pau — — Pass — — Pass
2011 Pass — — Pass — — Pass — — Pass
2012 Pass —
Dynapar Corp/004 (comb 01,02,03) Ac P/F Lim: 90% Fthd
NC0001121/004 Begin:12/1/2006 Frequency: Q Mar Jun Sep Dec
County: Bladen Region: FRO Subbasin: CPF16
PF: NA Special
7Q10: 812.5 IWC(%) NA Order
Fthd24PF 2008 — — Pass — — Fail Pass — Pass — — Pass
+ NonComp:Single 2009 — — Pass -- — Pass — — Pass — — Pass
2010 — — Pass -- — Pass — — Pass — — Pass
2011 — — Pass -- — Fail.Pass — — Pass — — Pass
2012 — —
DYNEA USA Inc. cltr lim: 0.39%
NC0000892/001 Begin-8/I/2007 Frequency: Q + Feb May Aug Nov
County: Chatham Region: RRO Subbasin: CPF07
PF: 0.10 Special
7Q10: 40.0 IWC(%) 0.39 Order:
Ceri7dPF 2008 — Pass — — Pass — — Pass — — Pass
NonComp:Single 2009 — Invald — — Pass — — Pass — — Pass
2010 — Pass — — Pass — — Pass — — Pass
2011 — Pass — — Pass — — Pass — — Pass
2012 — Pass
E-flex, LLC WWTP CHR LIM: 1.6%; 2.0•/. (rij 1.0 MGD Ceri7dPF 2008 H H H H H H H H H H H H
NC0004120/001 Begin:2/1/2004 Frequency: Q Mar Jun Sep Dec + NonComp:SINGLE 2009 — — H — — H — — H — — H
County: Cleveland Region: MRO Subbasin: BRD04 2010 » — H — — H — — — — —
PF: 0.78 spacial 2011 — — H — — H — — H — — H
7Q10: 76 IWC(%) 2.4 Order: 2012 — —
Enron Corp/001 24hr LC50 ac monit epis fthd
NC0003379/00I Begin 4/1/2008 Frequency: A
County: Person Region: RRO Subbasin: NEU01
PF: 0.022 special
7Q10: 0.0 IWC(%) 100.0 Order
Fthd24Ac 2008 — — — —
NonComp: 2009 — — — — >100 --
2010 — — — — — >100
2011 — — — — — >100
2012 — —
EBDC, Davidson LLC-Mil1 Pisgah Forest pf lim: 21%
NC0000078/001 Begin-9/1/2007 Frequency: Q Jan Apr Jul Oct
County: Transylvania Region: ARO Subbasin: FRBOI
PF: 13.0 Special
7Q10: 154 IWC(%) 21 Order:
Ceri7dPF 2008 Pass — — H — — H — — H
+ NonComp:Single 2009 Pass — — Pass — — H — — Pass
2010 Pass — — Pau — — H — — H
2011 Pass — — Pass — — Pass — — Pass
2012 Pass —
P Pre 2008 Data Available
LEGEND: -
PERM = Permit Requirement LET = Administrative Letter - Target Frequency = Monitoring frequency: Q- Quarterly; M- Monthly; BM- Bimonthly; SA- Semiannually; A- Annually; OWD- Only when discharging; D- Discontinued monitoring requirement
Begin = First month required 7Q10 = Receiving stream low flow criterion (cfs) += quarterly monitoring increases to monthly upon failure or NR Months that testing must occur - ex. Jan, Apr, Jul, Oct NonComp = Current Compliance Requirement
PF = Permitted flow (MGD) IWC/. = Instream waste concentration P/F = Pass/Fail test AC = Acuto CHR = Chronic
Data Notation: f - Fathead Minnow; • - Ceriodaphnia sp.; my - Mysid shrimp; ChV - Chronic value; P - Mortality of stated percentage at highest concentration; at - Performed by DWQ Aquatic Tox Unit; bt - Bad test
Reporting Notation: — = Data not required; NR - Not reported Facility Activity Status: I - Inactive, N - Newly Issued(To construct); H - Active but not discharging; f -More data available for month in question; = ORC signature needed
19

City of Dunn
NC0043176
Qw (MGD) =
I Q I OS (cfs) =
7QIOS (cfs) =
7Q1OW (cfs) =
30Q2 (cfs)
Avg. Stream Flow, QA (cfs) =
Receiving Stream:
REASONABLE POTENTIAL ANALYSIS
3.75
472.92
586.60
NO 7Q10w DATA
NO 30Q2 DATA
3601.00
Cape Fear River
WWTP/WTP Class: IV
IWC ® 1Q1OS = 1.21%
IWC ® 7QIOS = 0.98%
IWC @ 7Q1OW = N/A
IWC @ 30Q2 = N/A
IWC@QA= 0.16%
Stream Class: WS-V
Outfall 00'1
Qw = 3.75 MGD
CHRONIC TEST CONCENTRATION = 0.98%
PARAMETER
TYPE
(1)
STANDARDS & CRITERIA (2)
a
enREASONABLE
2
POTENTIAL RESULTS
RECOMMENDED ACTION
NC WQS /
Chronic
Applied
Standard
'/2 FAV /
Acute
n # Det. Max Pred Allowable Cw
Cw
Mercury
NC
12
FW(7Q1Os)
0.5
ng/L
3 3
Note: n < 9
I.,imited data set
1 1,294.9
Default C.V.
Acute: NO WQS
_ _________ _ __
Chronic: 1,224.5
No value > Allowable Cw
nolimit
_ __
_ ____________ _
Page 1 of 1
43176-RPA-2011.xlsm, rpa
4/18/2012

REASONABLE POTS I a SAL ANALYSTS
Mercury
Date Data
BDL=112DL Results
230 230 Std Dev. 17.3205
200 200 Mean 210.0000
200 200 C.V. (default) 0.6000
n 3
SPEClAL-
Values" WITH
"COPY"
Mult Factor = 5.63
Max. Value 230.0 ng/L
Max. Pred Cw 1294.9 ng/L
43176-RPA-2011.xlsm, data
- 4 - 4/18/2012

NCDENR
North Carolina Department of Environment and Natural Resources
Division of Water Quality
Beverly Eaves Perdue Coleen H. Sullins Dee Freeman
Governor Director Secretary
April 11, 2011
MEMORANDUM
TO:
Dina Sprinkle
NPDES Unit, Point Source Branch
FROM: Mark Brantley, Environmental Chemist e
Fayetteville Regional Office
THROUGH: Belinda Henson, Regional Supervisor ryQiG�•
Surface Water Protection Section
Fayetteville Regional Office
SUBJECT: Major NPDES Permit Renewal
Black River WWTP
NPDES Permit NC0043176
Harnett County
Attached is the staff report and recommendations of the Fayetteville Regional Office concerning the subject
major NPDES permit renewal.
Also attached are copies of the most recent inspection report dated March 2, 2006, a list of monitoring
report violations from BIMS for 2009 and 2010, parameter averages from BIMS for 2009 through January
2011 as well as a facility rating sheet.
If you have any questions or require further information, please contact our office.
Attachments
cc: Central Files
Location: 225 Green Street. Suite 714. Fayetteville. North Carolina 28301
Phone: [phone] FAX: [phone] Customer Service: 1-877-623-6748
Internet: www.ncwaterouality.orq
An Equal Opportunity Employer
No thCarolina
Naturally

SOC PRIORITY PROJECT: YES_ NO X
If Yes, SOC No.
To: NPDES Unit, Point Source Branch
Surface Water Protection Section
Attention: Dina Sprinkle
Date: April 7, 2011
NPDES STAFF REPORT AND RECOMMENDATION
COUNTY: Harnett
Permit No. NC 0043176
PART I - GENERAL INFORMATION
1. Facility and Address: City of Dunn Black River WWTP
PO Box 1065
Dunn, NC 28335
2. Date of Investigation: March 2, 2011
3. Report Prepared by: Mark Brantley, Environmental Chemist
4. Persons Contacted and Telephone Number:
Mrs. Donrie Dukes, ORC
910-892-2935
5. Directions to Site: Treatment facility is located at the end of a dirt road off the south side of NCSR 1844
(Susan Tart Road), opposite from Dunn Memorial Hospital
6. Discharge Point(s), List for all discharge points:
Latitude: 35° 17' 45" Longitude: 78° 38' 18"
Attach a U.S.G.S. map extract and indicate treatment facility site and discharge point on map.
U.S.G.S. Quad No. F-24-SW U.S.G.S. Quad Name: Erwin, NC
7. Site: Land available for expansion and upgrading: YES
8. Topography and relationship to flood plain: Basically flat with some gently sloping areas.
9. Location of nearest dwelling: Approximately 500 feet from entrance gate
10. Receiving stream or affected surface waters: Cape Fear River
a. Classification: Class WS-V
b. River Basin and Subbasin No.: Cape Fear River Basin 03 - 06 - 13
c. Describe receiving stream features and pertinent downstream uses:
The main stem of the Cape Fear River at this point is used primarily for fish and wildlife
propagation, fishing and boating. The City of Fayetteville has a water intake approximately 20
miles downstream. Access to this stretch of the river is limited.

PART II - DESCRIPTION OF WASTES AND TREATMENT WORKS
1. a. Volume of wastewater to be permitted: 3.75 MGD (ultimate design capacity)
b. What is the current permitted capacity of the wastewater treatment facility? 3.75 MGD
c. Actual treatment capacity of the current facility (current design capacity). 3.75 MGD
d. Date(s) and construction activities allowed by previous Authorizations to Construct issued in the previous
two (2) years. The ATC 043176A01 was issued on April 30, 2010 for converting gas chlorination/de-
chlorination to a liquid chlorination/de-chlorination system. An ATC permit 043176A02 was issued on
March 26, 2010 for plant upgrades.
e. Please provide a description of existing or substantially constructed wastewater treatment facilities:
Since the issuance of the last NPDES permit for this facility the following changes have occurred:
Changes to the head works
• Replacement of existing influent pump station which consisted of three screw pumps with a new
influent pump station consisting of two T-10 and two T-12 Gorman Rupp pumps.
• Replacement of existing automatic bar screen and grit removal units with new automatic bar
screen grit removal units.
• Construction of a new pump station consisting of two T-10 Gorman Rupp pumps and a three
million gallon equalization tank.
Changes to bio-solids handling equipment
• Replacement of three blowers and aeration system in existing sludge digester
• Replacement of existing Diffused Air Flotation unit with a new Rotary Drum Thickener for
sludge thickening
Changes to dual chlorine contact basin
• Process change from gas chlorine to 12% sodium hypochlorite liquid for disinfection of effluent.
• Process change from gas sulfur dioxide to sodium bisulfite liquid for de -chlorination of effluent.
In addition to the changes listed above the BRWWTP continues to operate a coarse bubble activated
sludge aeration basin with four cells, three final clarifiers (60 feet in diameter), dual chlorine contact basin
(as described above), an effluent pump station with three vertical turbine pumps and river cascade
discharge. Sludge handling facilities include aerobic digester (150,000 gallon capacity), a secondary
aerobic digester/sludge holding tank (500,000 gallon capacity) and the rotary drum thickener as described
above.
f. Please provide a description of proposed wastewater treatment facilities: NA
g. Possible toxic impacts to surface waters: NA
h. Pretreatment Program (POTWs only):
In development Approved
Should be required Not needed X

2. Residuals handling and utilization/disposal scheme:
a. If residuals are being land applied, please specify DWQ Permit No.
Permit Number WQ0006101
Residual Contractor: Synagro
Telephone:
b. Residuals stabilization: PSRP X PFRP Other
c. Landfill: NA
d. Other disposal/utilization scheme (specify): NA
3. Treatment plant classification (attach completed rating sheet): Grade IV
4. SIC Code(s): 4952
Primary 01 Secondary 23
Main Treatment Unit Code: 05003
PART III - OTHER PERTINENT INFORMATION
1. Is this facility being constructed with Construction Grant Funds or are any public monies involved
(municipals only)? NA
2. Special monitoring or limitations (including toxicity) requests:
No special monitoring requested. Monitoring and limits should be in keeping with basinwide strategy.
3. Important SOC, JOC, or Compliance Schedule Dates (please attach): N/A
Date
Submission of Plans and Specifications N/A
Begin Construction N/A
Complete Construction N/A
4. Alternative Analysis Evaluation: Has the facility evaluated all of the nondischarge options available? Please
provide regional perspective for each option evaluated.
Spray Irrigation: NA
Connection to Regional Sewer System: NA
Subsurface: NA
Other disposal options: NA
5. Other Special Items: None

PART IV - EVALUATION AND RECOMMENDATIONS
According to some of the data and information provided in the renewal application, the City of Dunn has reduced
some of their inflow and infiltration through sewer rehabilitation projects. They are also looking into the
possibility of flow equalization facilities at the treatment plant and expanding the capacity of their Eastside
pumping system. It is the recommendation of the Fayetteville Regional Office that the subject application for
permit renewal be processed in keeping with basinwide strategy.
Auk pd-te,14,7;-/,
Signature of Report,Preparer
lifin;det) 1910420eryp
Regional Supervisor, Surface Water Protection Section
Date

D....--A1111-..- north carolina
uN
city of dunn
UTILITIES DEPARTMENT
POST OFFICE BOX 1065 • DUNN, NORTH CAROLINA 28335
[phone] • FAX [phone]
www.dunn-nc.org
March 18, 2011
Mrs. Dina Sprinkle
NC DENR / DWQ / NPDES
1617 Mail Service Center
Raleigh, NC 27699-1617
Mayor
Oscar N. Harris
Mayor Pro Tem
N. Carrell
Robinson
Council Members
Buddy Maness
Bryan Galbreath
Billy Tart
Chuck Tumage
Joey Tart
City Manager
Ronald D. Autry
Re: 2011 City of Dunn Black River WWTP NPDES Permit # NC0043176 Application for Renewal
Dear Mrs. Sprinkle,
The City of Dunn is requesting renewal of its NPDES permit #NC0043176 for the continued operation of the
Black River WWTP located at 580 J.W. Edwards Lane off of Susan Tart Road. Enclosed you will find the
application package required for renewal of municipal NPDES permits.
Changes at the Black River WWTP since issuance of the last NPDES permit include:
• Process change from gas chlorine to 12 % sodium hypochlorite liquid for disinfection of effluent
• Process change from gas sulfur dioxide to sodium bisulfite liquid for de -chlorination of effluent
• Replacement of existing influent pump station which consisted of three (3) screw pumps with a new
influent pump station consisting of two (2) T-10 and two (2) T-12 Gorman Rupp pumps
• Replacement of existing automatic bar screen and grit removal units with new automatic bar screen and grit
removal units
• Replacement of three (3) blowers and aeration system in existing sludge digester
• Replacement of existing Diffused Air Flotation unit with a new Rotary Drum Thickener for sludge
thickening
• Construction of a new pump station consisting of two (2) T-10 Gorman Rupp pumps and a three (3) million
gallon equalization tank
Sincerely,
Dean Gaster
Utilities Director
litre comm ..,• matters

,L,L,L.,.,„LL,
Ffli uNN
eitY r dtinn
SOLIDS HANDLING PLAN
The City of Dunn has a service contract with Synagro for the land application of
liquid biosolids from its Wastewater Treatment Facility (NPDES permit # NC0043176)
and Water Treatment Facility (NPDES permit # NC0078955). The biosolids are applied
to any of twenty-one (21) permitted (WQ permit # WQ0006101) application fields
located in the counties of Harnett, Sampson, and Cumberland, North Carolina.
Total number of dry tons applied:
2008 — 300.34
WWTP —151.48
WTP — 148.86
2009 — 388.51
WWTP — 242.09
WTP — 146.42
2010 — 460.21
WWTP — 229.82
WTP — 230.39
Total numbers of fields utilized for land application during the year:
2008 - 6
2009 - 8
2010-6
Total number of acres utilized for land application during the year:
2008 — 105.6
2009 —109.6
2010 — 184.8

INFLUENT
PUMP STA.
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DAVIS-MARTIN-POWELL & ASSOCIATES, INC.
dmENGINEERING . LAND PLAW1NG . SURVEYINGP
6415 OLD PLANK ROAD
HIGH POINT. NORTH CAROLINA 27265
GRAPHIC SCALE
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1" = 60 FEET
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CITY OF DUNN, NORTH CAROLINA
BLACK RIVER WWTP
SITE PLAN

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CITY OF DUNN, NORTH CAROLINA
BLACK RIVER WASTEWATER PLANT
LOCATION MAP
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HARNETT COUNTY, NORTH CAROLINA
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Harnett County GIS
305 W Cornelius Harnett Blvd, Suite 100
Lillington NC 27546
Phone: [phone] WWW.HARNETT.ORG
Any use of thls map shall be at the sole risk of the user of thls mapAlthough, all effort has been taken
to insure accuracy in the data presented, Hamett County makes nowarranty, expressed orimpliied,as
to the accuracy of this infomia1tion represented herein. Any user of this product shall hold harmless
Hamett County, its elected officials, employees and agents from and against any claim, damage, loss,
action, cause of action. or liability arising from the use of this GIS product
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