NC0043176_Permit (Modification)_20030131

NPDES DOCUMENT :SCANNING COVER SHEET
NPDES Permit:
NC0043176
Dunn WWTP
Document Type:
Permit Issuance
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:
January 31, 2003
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State of North Carolina
Department of Environment
and Natural Resources
Division of Water Quality
Michael F. Easley, Governor
William G. Ross, Jr., Secretary
Alan W. Klimek, P.E., Director
Mr. Joseph Campbell
City of Dunn
Post Office Box 1065
Dunn. North Carolina 28335
January 31, 2003
Subject:
A
i•
NCDENR
Permit Modification Issuance
City of Dunn - Black River WWTP
NPDES Permit No. NC0043176
Harnett County
Dear Mr. Campbell:
Based on an agreement between the State of North Carolina and the Environmental Protection Agency.
this permit is being re -opened to require a weekly average limit for ammonia. After calculating allowable
concentrations and analyzing past ammonia data, the Division has set this limit at three times your
monthly average concentration (not to exceed 35 mg/L).
Enclosed please find the modified permit. This permit modification 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 December 6, 1983.
If any parts, measurement frequencies or sampling requirements contained in this permit modification
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 take notice that this permit is not transferable. Part II. E.4. addresses the requirements to be
followed in case of change in ownership or control of this discharge. This permit does not affect the legal
requirement to obtain other permits which may be required by the Division of Water Quality or permits
required by the Division of Land Resources, Coastal Area Management Act or any other Federal or Local
government permit that may be required.
If you have any questions, comments. or concerns regarding this permit modification, please do not
hesitate to contact Christie Jackson at [phone]. extension 538.
Alan W. Klimek, P.E.
cc: Central Files
NPDES Unit Files
Fayetteville Regional Office
EPA Region IV
1617 Mail Service Center, Raleigh, North Carolina 27699-1617 Telephone [phone] FAX [phone]
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Permit NC0043176
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES
DIVISION OF WATER QUALITY
PERMIT
TO DISCHARGE- WASTEWATER UNDER THE
NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM
In compliance with the provision of North Carolina General Statute 143-215.1, other lawful standards and regulations
promulgated and adopted by the North Carolina Environmental Management Commission, and the Federal Water
Pollution Control Act, as amended, 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 March 1, 2003.
This permit and authorization to discharge shall expire at midnight on September 30, 2006.
Signed this day January 31, 2003.
Alan W. Klimek, P.E. Director
Division of Water Quality
By Authority of the Environmental Management Commission

Permit NC0043176
SUPPLEMENT TO PERMIT COVER SHEET
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
• Mechanical bar screen
• Aerated grit removal
■ Influent flow measurement
■ Aeration basins- 4 cells
■ Three final clarifiers
• Dual gas chlorination and dechlorination
• Dual chlorine contact tanks
• Effluent pumps
• Effluent flow meter
• Cascade discharge
• Sludge handling including DAF sludge 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.

Latitudes
Longitude:
USGS Quad it:
River Basin $
Receiving Stream:
Stream aas::
35' 17 31'
T8'41'09" Nt
F24SW
03-06-13
Cape Fear River
ws-v
City of Dunn
Black River WwTP
Harnett County -
NC0043176

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:
DISCHARGE LIMITATIONS
MONITORING REQUIREMENTS
EFFLUENT
CHARACTERISTICS
Monthly
Average
Weekly
Average
Daily
Maximum
Measurement
Frequency
Sample
Type
Sample Locations
3.75 MGD
Continuous
Recording
Influent or Effluent
_Flow
BOD, 5-day, 200C 2
(April 1— October 31)
12.0 mglL
18.0 mglL
Daily
Composite
Influent and Effluent
BOD, 5-day, 200C 2
(November 1— March 31)2
24.0 mglL
36.0 mg/L
Daily
Composite
Influent and Effluent
Total Suspended Solids2
30.0 mglL
45.0 mglL
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 0xygen3
Daily
Grab
Effluent
Fecal Coliforin
(geometric mean)
200/100m1
400/100mI
Daily
Grab
Effluent
Total Residual Chlorine
28pg/L
Daily
Grab
Effluent
Temperature
Daily
Grab
Effluent
Total Phosphorus
Monthly
Composite
Effluent
Total Nitrogen
(NO2 + NO3 + TKN)
_
Monthly
Composite
Effluent
Chronic Toxicity,
Quarterly
Composite
Effluent
pHs
Daily
Grab
Effluent
Temperature°
31Week1
Grab
Upstream & Downstream
Dissolved Oxygen°
3/Week7
Grab
Upstream & Downstream
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. The daily average dissolved oxygen concentration as measured in the effluent shall not be less than 5.0 mg/L.
4. Chronic Toxicity (Ceriodaphnia) limit at 1% with testing in March, June, September, and December (see Special
Condition A. (2)).
5. The pH shall not be less than 6.0 standard units nor greater than 9.0 standard units.
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 Oune-September) and weekly (October -May).
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 Ceriodaphnia 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 will be 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 Branch
1621 Mail Service Center
Raleigh, North Carolina 27699-1621
Completed Aquatic Toxicity Test Forms shall be filed with the Environmental Sciences Branch no later than 30 days
after the end of the reporting period for which the report is made.
Test data shall be complete, 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 Branch 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 include
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.

1
UNITED STATES ENVIRONMENTAL PROTECTION AGENCY
REGION 4
ATLANTA FEDERAL CENTER
61 FORSYTH STREET
ATLANTA, GEORGIA 30303-8960
November 26, 2002
Ms. Christie Jackson
NPDES Unit
Division of Water Quality
North Carolina Department of Environment
and Natural Resources
1617 Mail Service Center
Raleigh, NC 27699-1617
G00? - 330
SUBJ: Review of NPDES Permit Modifications
Weekly Average Ammonia Limits
Dear Ms. Jackson:
In accordance with the EPA/NCDENR MOA, we have completed our review of the draft
permit modifications to include weekly average ammonia limits. The permits that were reviewed
and have no comment are listed below.
Facility
City of Gastonia WWTP
City of Graham WWTP
City of Fayetteville/Cross Creek WWTP
City of High Point/East Side WWTP
OWASA/Mason Farm WWTP
City of Asheboro WWTP
Town of Siler City WWTP
Johnston County Regional WWTP
City of Hickory/Henry Fork WWTP
City of Dunn/Black River WWTP
Town of Robbins WWTP
Town of Holly Springs WWTP
NPDES Permit No.
NC0020184
NC0021211
NC0023957
NC0024210
NC0025241
NC0026123
NC0026441
NC0030716
NC0040797
NC0043176
NC0062855
NC0063096
Two draft permit modifications, Fuquay-Varina/Kenneth Creek WWTP (NC0028118) and
the City of Burlington/South Burlington WWTP (NC0023876) are not correct. The Fuquay-
Varina draft modification does not have the weekly average limit for the summer months in the
table and the Burlington draft modification does not have the summer and winter weekly average
limits in the table. This no comment letter is conditional for these two permits until the
appropriate corrections are made.
Internet Address (URL) • http:l/www.epa.gov
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2
We request that we be afforded an additional review opportunity only if significant
changes are made to the draft permit modification prior to issuance, or if additional significant
comments to this modification are received. Otherwise, please send us one copy of the final
permit modification when issued. If you have any questions, please feel free to contact me at
[phone] or at [e-mail].
Sin4erely,
Madoiyn S. Dominy
NPDES & Biosolids Section
Permits, Grants and Technical Assistance Branch
Water Management Division

Jan•22. 2003 4:26PM
Nov 12 12;31 2002 User: Melody Tart; Title: 6126-
STATE OF NORTH CAROLINA
COUNTY OF HARNETT
Irs the matter of:
Ref ad #: 81643 WASTEWATER PERMIT
i, Suzanne Godwin, being duly swon, say: that I az
CLASSIFIED ADVERTISING CLERK of THE DAILY RECORD,
a newspaper published at Dtnn, Earnett County, Nort
and that the attached clipping is a copy of the Not
Published said newspaper for 1 days, as follows;
11/11/2002
as requirac1 by law in the above entitled suit.
This newspaper is qualified for legal advertising
in accordance with G.S. 1-597 and 1-598.
Classit:ie d�erci:
Subscribed and sworn to before me,
this 12th day of November, 2002
littf_ • w
I4y commission xpizes
Notary Public
Fu5LclNo.0366 P. 2
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 Pt RMIT.:
On the basis of thorough staff review and application of NC General Stt lute
143.21 Public law 92.500 and other lawful standards and regulations, he
North Carolina Environmental Management commission proposes 10 issue
a National Pollutant Discharge Elimination System (NPDES) wastewater
discharge permit to the peraon(s) listed betow effective 45 days from the
publish data of this notice.
NPDES Permit Number NC0043176, DUNN, WWTP, SUSAN TART ROAD,
DUNN, NC 28334 has applied for a modification for a facility located in
Harnett County discharging wastewater into CAPE FEAR RIVER in the
Cape Fear River Basin. Currently SOD, NH3 AND TRC are water quality.
limited. This discharge may.affect future allocations In this portion of the -
receiving stream.
Written comments regarding the proposed permit will be accepted until 30
days after tho publish date of ibis donee. All comments received prier to that
date are considered in the final determinations regarding the proposed I
permit. The Direetr of the NC Division of Water Quality may decide to hold:
a public meeting for a proposed permit should the Division receive a signif-
icant degree of publicsrrest.
Copies of the draft permit and other supporting information on file used to
determine conditions present In the draft permit are available upon request
and payment of the costs ofreproduction. Mail comments and/or requests
for. Information to the NC Division of Water Quality at the above address or
call Ms. Valery Stephens at [phone], extension 5201 Please Include
the NPDES permit number(attached) in any communication. Interested
persona may also visit the Division of Water Quality at 512 N. Salisbury
Street, Raleigh, NC 27604-11 d8 between the hours of &00 a . end 5:00
p.m. to review information on file,
11/11, 2002

State of North Carolina
Department of Environment
and Natural Resources
Division of Water Quality
Michael F. Easley, Governor
William G. Ross, Jr., Secretary
Alan W. Klimek, P.E., Director
MEMORANDUM
To:
From:
Subject:
November 1, 2002
Debra Benoy
NC DENR / DEH / Regional Engineer
Fayetteville Regional Office
Christie Jackson
NPDES Unit
Review of Draft NPDES Permit NC0043176
City of Dunn — Black River WWTP
Harnett County
A7rA
NCDENR
NORTH CAROLINA DEPARTMENT OF
ENVIRONMENT AND NATURAL RESOURCES
Please indicate below your agency's position or viewpoint on the draft permit and return this form by
November 29, 2002. If you have any questions on the draft permit, please contact me at the telephone
number or e-mail address listed at the bottom of this page.
wwww,Vw Vwww/wwwwwwVVwwVVvVwww Vw VwA/wwwwVVVVww vvVvVw
RESPONSE: (Check one)
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:
1617 Mail Service Center, Raleigh, North Carolina 27699-1617 919 733-5083, extension 538 (tax) 919 733-0719
VISIT US ON THE INTERNET @ http://h2o.enr.state.nc.us/NPDES Christie.Jackson@ ncmail.net