NC0043176_Permit (Issuance)_20061218

NPDES DOCLINENT SCANNIN. 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:
December 18, 2006
This document is printed on reuse paper - ig u,iean-y
content on the reNrex-se side

‘‘, v Michael F. Easley
/ \ G Governor
CJ)fr William G. Ross, Jr., Secretary
> —I North Carolina Department of Environment and Natural Resources
0 *-C
Alan W. Klimek, P.E., Director
Division of Water Quality
Mr. Ronald Autry, Director of Public Works
City of Dunn
P.O. Box 1065
Dunn, North Carolina, 28335
December 18, 2006
Subject: Issuance of NPDES Permit
Permit No. NC0043176
Dunn WWTP
Harnett County
Dear Mr. Autry:
Division personnel have reviewed and approved your application for 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 ancl the U.S. Environmental Protection
Agency dated May 9, 1994 (or as subsequently amended).
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 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 Teresa Rodriguez at telephone number (919) 733-
5083, extension 553.
Sincerely,
Alan W. Klimek, P.E.
Cc: NPDES Files 4
Fayetteville Regional Office — Surface Water Protection
Aquatic Toxicology Unit
EPA Region 4
Carolina
Wirral!,
North Carolina Division of Water Quality 1617 Mail Service Center Raleigh, NC 27699-1617 Phone [phone] Customer Service
Internet: h2o.enr.state.nc.us 512 N. Salisbury St. Raleigh, NC 27604 FAX [phone]
An Equal Opportunity/Affirmative Action Employer —50% Recycled/10% Post Consumer Paper

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 February 1, 2007.
This permit and authorization to discharge shall expire at midnight on September 30, 2011.
Signed this day December 18, 2006.
c *. Alan W. Klimek, P.E.=Ad
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
• 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.

Latitude: 350 17' 31" N
Longitude: 78° 41' 09" W
Receiving Stream: Cape Fear River Drainage Basin: Cape Fear River
Stream Class: WS-V Sub -Basin: 03-06-15
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 Pennittee as specified below:
. ••
'
" EFFLUENT '
ISCHARGE LIMITATO ' '
' • ' - '
'MONITORING VIRE ,-- .
' - '." — '7. •
,
ca.0AcrEiiiriCs .
- - - . ' ---Average'
_
. Monthly.•
.
,Weekly
.-Average -
. '
Maximum :
. ,
. , es*t4-tit
.., reip#4 :
: Sample _
_ . " _ .
., ,,
, - ' e' c*t_14;1,1
: f: . '''.:•
Flow
3.75 MGD
Continuous
Recording
Influent or Effluent
BOD, 5-day, 20°C
(April 1 — October 31)2
12.0 mg/L
18.0 mg/L
Daily
Composite
Influent and Effluent
BOD, 5-day, 20°C
(November 1 — March 31)2
24.0 mg/L
36.0 mg/L
Daily
Composite
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 0xygen3
Daily
Grab
Effluent
Fecal Coliform
(geometric mean)
200/100m1
400/100m1
Daily
Grab
Effluent
Total Residual Chlorine
' 28 pg/L
Daily
Grab
Effluent
Temperature
,
Daily
Grab
Effluent
Total Phosphorus
Monthly
Composite
Effluent
TKN (mg/L)
Monitor and report
Monthly
Composite
Effluent
NO3-N + NO2-N (mg/L)
Monitor and report
Monthly
Composite
Effluent
Total Nitrogen4
Monthly
Composite
Effluent
Chronic Toxicity5
Quarterly
Composite
Effluent
pH5
Daily
Grab
Effluent
Temperature
See note 7
Grab
Upstream & Downstream
Dissolved 0xygen7
See note 7
Grab
Upstream & Downstream
NOTES:
1.
2.
Upstream = at NC Highway 217. Downstream = approximately 1400 feet below discharge.
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. 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
Special Condition A. (2)).
6. The pH shall not be less than 6.0 standard units nor greater than 9.0 standard units.
7. 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 weeldy (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
Ceriodapbnia 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 Il 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 DII,NR / 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.

Permit NC0043176
A. (3) EFFLUENT POLLUTANT SCAN
The permittee shall perform an annual Effluent Pollutant Scan for all parameters listed in the table below (in accordance
with 40 CFR Part 136). The annual effluent pollutant scan samples shall represent seasonal (summer, winter, fall, spring)
variations over the 5-year permit cycle. Unless otherwise indicated, metals shall be analyzed as "total recoverable."
Additionally, the method detection level and the minimum level shall be the most sensitive as provided by the
appropriate analytical procedure.
Ammonia (as N)
Chlorine (total residual, TRC)
Dissolved oxygen
Nitrate/Nitrite
Total Kjeldahl nitrogen
Oil and grease
Total Phosphorus
Total dissolved solids
Hardness
Antimony
Arsenic
Beryllium
Cadmium
Chromium
Copper
Lead
Mercury
Nickel
Selenium
Silver
Thallium
Zinc
Cyanide
Total phenolic compounds
VolntilP oraanic compounds:
Acrolein
Acrylonitrile
Benzene
Bromoform
Carbon tetrachloride
Chlorobenzene
Chlorodibromomethane
Chlomethane
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-propylarnine
N-nitrosodimethylamine
N-nitrosodiphenylarnine
Phenanthrene
Pyrene
1,2,4-trichlorobenzene
Test results shall be reported to the Division in DWQ Form- DMR-PPA1 or in a form approved by the Director,
within 90 days of sampling. A copy of the report shall be submitted to Central Files to the following address: Division
of Water Quality, Water Quality Section, 1617 Mail Service Center, Raleigh, North Carolina 27699-1617.

Dunn & Erwin
Subject: Dunn & Erwin
From: John Giorgino <[e-mail]>
Date: Mon, 18 Dec 2006 14:46:07 -0500
To: Teresa Rodriguez <[e-mail]>
Teresa, no comments on NC0064521 & NC0043176. Since Kevin left the unit, I play catch-up every month.
- John
Teresa Rodriguez wrote:
John, I can't recall if I received your comments on this permit, I recently cleaned up my emails and may
have deleted it. It was sent to public notice on October 25, 2006.
Teresa
J- ohn Giorgino
Environmental Biologist
North Carolina Division of Water Quality
Environmental Sciences Section
Aquatic Toxicology Unit
Mailing Address:
1621 MSC
Raleigh, NC 27699-1621
Office: 919 733-2136
Fax: [phone]
1 of 1 12/18/2006 3:00 PM

DENR/DWQ
FACT SHEET FOR NPDES PERMIT DEVELOPMENT
NPDES No. N00043176
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:
No
Permit Writer:
Teresa Rodriguez
Subbasin:
03-06-15
Date:
October 5, 2006
Stream index:
18-(20.7)
--- -- -
- q.,4.•144iiig_i.w'g,
- -•:, •V''r ''''4
• ,
_
Drainage Area (mi2):
3464
Summer 7Q10 (cfs)
586.6
Winter 7Q10 (cfs):
Average Flow (cfs):
3601
IWC (°/0) @ 3.75 MGD:
1
SUMMARY
The City of Dunn submitted a permit renewal request on April 3, 2006. There have been no major
changes to the facility from the previous permit renewal. They operate a 3.75 MGD facility consisting of
three influent screw pumps, one suction lift pump, mechanical bar screen, aerated grit removal, influent
flow meter, activated sludge aeration basin, three clarifiers, dual chlorine contact basin, dechlorination
system, effluent pumps and cascade aerator.
BASINW IDE PLAN
All waters in this sub -basin are impaired on an evaluated basis in the fish consumption category.
COMPLIANCE SUMMARY
- Data was reviewed for 2004-2006. The facility received four NOVs in 2004, two weekly average total
residual chlorine violations in December 2004, one average monthly flow violation in September 2004 and
a pH violation in December 2004. All other parameters were within permit limits for the period examined.
Average values for monitoring parameters were as follows:
PARAMETER
BOD
TSS
TN
TP
NH3N
Flow
AVERAGE 04-06
3.7 mg/L
7.3 mg/L
4.6 mg/L
1.4 mg/L
0.1 mg/L
2.2156 MGD
Whole Effluent Toxicity - The permit requires quarterly chronic effluent toxicity test (Ceriodaphnia) at
1.0 %. The facility passed all the toxicity tests.
Priority Pollutant Analysis — The city submitted results of three pollutant analyses. No parameter was
detected above the allowable concentration.
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
• Weekly average ammonia limits of 6 mg/L during the summer and 12 mg/L during
the winter. All permits with monthly average limits will receive weekly average limits
as required in federal regulations.
• Reporting of nitrogen species (TKN and NO3-N + NO2-N) - The Division is
implementing nutrient monitoring strategy on all Cape Fear permits to gather data
necessary for future modeling efforts.
Fact Sheet
NPDES Renewal NC0043 176
Page 1

• Annual Effluent Pollutant Scan — All major municipal permits are required to do the
annual pollutant scan to collect data required for permit renewal.
PROPOSED SCHEDULE FOR PERMIT ISSUANCE
Draft Permit to Public Notice: October 25, 2006
Permit scheduled to issue: December 18, 2006
STATE CONTACT
If you have any questions on any of the above information or on the attached permit, please contact
Teresa Rodriguez [phone] ext. 553.
NAME:
REGIONAL OFFICE COMMENTS
DATE:
NAME: DATE:
Fact Sheet
NPDES Renewal NC00-13176
Page 2

THE DAJ:A, RECORD
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AO 118620 First caken by suzy 10/27/2006 0:2 16
Lasc changed by suay 10/2//2006 0912
19191 133-5083 AcccI 10768 Given by CAROLYN BRYANT
14CDENR Start 10/30/2006 Stop 10/30/2006
ATTN VALEREY STEPHENS Transient Bill Expir.
1617 MA:,L SERVICE CENTER Class 901 LECAL NOTICES
RALEIcH. MC 2/699 Index: WASTEWATER PERMIT
Subset'? N Cols 2 Linea 46 Inches 5.64 Words 355 Box? N
Mail Info: Type mail Schad Copes Sunday Commenc
Tear D L 1 N off 134010 mailed 8/18/06
Aftld L L. 1 Wascewater Permit
PUb R6144 Base -Charge Addl-Charge Total-C(1st Ins Start Brop SMTWTFS
1 LEGAL 92.92 0 no 91.q2 1 10/30/2006 10/30/2006 0103010
6 LeGAL 2./5 0.00 2 75 1 10/30/2006 10/30/2006 0104)610
TOTAL AD COST 95 1'7
PUBLIC NOTICE
STATE OF NORTH CAFIOLINA
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 stanclards end 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.
City of Dunn. NPDES permit NC0043176, has applied for renewal of its permit
discharging to the Cape Fear River in the Cape Fear River Basin. BOD.
ammonia and total residual chlorine are water quality limited parameters
This discharge may OW future allocations in the receiving stream
Harnett County Department of Public utilities has applied for renewai of the
Erwin's WWTP, NPDES permit NC0064521, dischArging to the Cape Fear
River in the Cape Fear River Basin Total residual chlorine is water quality
limited This discharge may affect future allocations to the receiving stream
Written comments iegarding the proposed permit will be accepted until 30
days alter the publish date of this notice. Alt cornments received prior to that
date are considered in the final determinations regarding the proposed
permit The Director of the NC Division ol Water Quality may decide to hold
a public meeting 10f the proposed permit should the Division receive a sig-
nificant degree of public interest
Copies 0 the draft permit and other supporting inforniation on tile used to de-
termine conditions present in the draft permit are available upon request and
payment of the costs ot reproduction. Mail comments and/or requests for
information to the NC Division of Water Quality at the above address or call
Ms. Carolyn Bryant [phone] extension 363 or Ms. Frances Cando -
!aria [phone], extension 520 at the Point Source Branch Please
include the NPDES permit number (attached) in any communication Inter-
ested persons may also vislt in° Division of Water Quality at 512 N
Salisbury Street, Raieign, NC 27604.1148 between the hours 01 8.00 ELM.
and 5 00 p M. to review information on Itle.
10/30, 2006
E d VC:OI LON 'flied

,
\111 A
—
436
Michael F. Easley, Governor
April 26, 2006
MEMORANDUM
TO: Francis Candelaria
NPDES Unit, Point Source Branch
FROM: Michael Lawyer, Environmental Technician
Fayetteville Regional Office
THROUGH: Belinda Henson, Regional Supervisor
Surface Water Protection Section
Fayetteville Regional Office
SUBJECT: Major NPDES Permit Renewal
Black River WWTP
NPDES Permit NC0043176
Harnett County
William G. Ross Jr., Secretary
North Carolina Department of Environment and Natural Resources
Alan W. Klimek, P.E., Director
..._._. Division ofWater QuaIit
1)'.3D
LL
1 ill
MAY - 1 2006
-tarvoicol q64vacr7o
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 2004 and 2005, parameter averages from BIMS for 2004, 2005 and January
and February 2006 as well as a facility rating sheet.
If you have any questions or require further information, please contact our office.
Attachments (5)
cc: Central Files
N°4thCarolina
Naturally
North Carolina Division of Water Quality 225 Green Street — Suite 714 Fayetteville, NC 28301-5043 Phone [phone] Customer Service
Internet: www.ncwaterquality.org FAX [phone]
An Equal Opportunity/Affirmative Action Employer —50% Recycled/10% Post Consumer Paper

•
. ,
SOC PRIORITY PROJECT: YES_ NO X
If Yes, SOC No.
To: NPDES Unit, Point Source Branch
Surface Water Protection Section
Attention: Francis Candelaria
Date: April 26, 2005
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: February 21, 2006
3. Report Prepared by: Michael Lawyer, Environmental Technician
4. Persons Contacted and Telephone Number:
Mr. Bobby Burnette, 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: 350 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. NA
e. Please provide a description of existing or substantially constructed wastewater treatment facilities:
The existing 3.75 MGD wastewater treatment facility consists of: three influent screw pumps
rated at 1.75 MGD each and one suction lift pump rated at 5.25 MGD, a mechanical bar screen,
an aerated grit removal and 250 GPM grit washer system, influent flow meter- 12" throat Parshall
flume with pressure transducer, flow divider box which feeds a coarse bubble activated sludge
aeration basin with four cells, three final clarifiers- 60' diameter, dual chlorine contact basin-40
minutes detention time at 3.75 MGD, dechlorination system, effluent pumps -three vertical turbine
pumps and river cascade discharge. Sludge handling facilities include aerobic digestor-150,000
gallon capacity, secondary aerobic digester/sludge holding tank-500,000 gallon capacity, a
dissolved air flotation (DAF) sludge thickener and six gravity sludge drying beds (no longer
utilized).
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: ABS Biosolids
Telephone: [phone]
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.
Siature of Report reparer
Regional Supervisor, Surface Water Protection Section
Date

CITY OF DUNN
POST OFFICE BOX 1065 • DUNN • NORTH CAROLINA 28335 • [phone]
Mayor
J. Dal Snipes
Mayor Pro Tem
Donnie Olds
Council Members
Buddy Maness
Bryan Galbreath
Billy Tart
Billy R. Godwin, Jr.
Joey Tart
North Carolina Department of Environment
and Natural Resources
Division of Environmental Management
P.O. Box 29535
Raleigh, NC 27626-0535
Dear Mr. Weaver:
March 29, 2006
Re: City of Dunn
Renewal of NPDES
Permits N00078955 and
NC0043176
City Manager
Michael Uskiewicz
The City of Dunn is hereby requesting renewal of NPDES Permit Numbers NC0078955 and
NC0043176. These permits expire September 30, 2006. Enclosed please find three (3) copies of
NPDES permit renewal applications for both the wastewater and water treatment plants.
In the event that you should have quesflons or need additional information, please do not hesitate to
give me a call.
•
C: File
Sincerely,
CITY OF DUNN
Ronald D. Autry
Assistant City Manager/Public Works Director

ATTACHMENT — LAND APPLICATION INFORMATION
Location: Farm of Al Rinne Field 1
Number of Acres: 16.2
Annual average daily volume applied to site: 700 GPD
Location: Farm of Al Rinne Field 2
Number of Acres: 36.4
Annual average daily volume applied to site: 1,800 GPD
Location: Farm of Donnie Barefoot Field 3
Number of Acres: 21.3
Annual average daily volume applied to site: 350 GPD
Location: Farm of Donnie Barefoot Field 7
Number of Acres: 22.9
Annual average daily volume applied to site: 1,380 GPD
Total Number of Acres: 96.8
Total Average Daily Volume Applied in 2005: 4,230 GPD
Note: City of Dunn Land Application Program 2005 Annual Report available upon request.
Davis -Martin -Powell & Associates Updated 3/24/2006
E3835

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