NC0020231_Permit (Issuance)_20040914

NPDES DOCUMENT SCANNING COVER SHEET
NC0020231
Louisburg WWTP
NPDES Permit:
Document Type:
Permit Issuance \
Wasteload Allocation
Authorization to Construct (AtC)
Permit Modification
Speculative Limits
201 Facilities
Plan
Instream Assessment (67B)
Environmental Assessment (EA)
Permit
History
Document Date:
September 14, 2004
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Mayor Karl Pernell
Town of Louisburg
110 West Nash Street
Louisburg, North Carolina 27549
Dear Mayor Pernell:
Michael F. Easley, Governor
William G. Ross Jr., Secretary
North Carolina Department of Environment and Natural Resources
Alan W. Klimek, P.E. Director
Division of Water Quality
September 14, 2004
Subject: Issuance of NPDES Permit NC0020231
Louisburg WWIP
Franklin County
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 May 9, 1994 (or as subsequently amended).
This final permit includes the following significant change from the draft permit sent to you on July 21,
2004:
Special Condition A.(4) has been added. This condition requires three mercury samples to be gathered
and analyzed, using EPA Method 1631, no later than October 1, 2005. Mercury data from three effluent
samples were submitted as required with the renewal application; however, these data were not analyzed
using an acceptable method. Please be aware that all effluent samples collected at your facility must be
analyzed using Method 1631. A copy of the letter sent to you on August 12, 2003 explaining this change is
enclosed.
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 Dawn Jeffries at telephone number
[phone], extension 595.
ct
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cc: Central Files
Raleigh Regional Office/Water Quality Section
NPDES Unit
Aquatic Toxicology Unit
EPA, Region 4
Sincerely,
ORIGINAL SIGNED BY
Mark McIntire
Alan W. Klimek, P.E.
NoiihCarolina
Naturally
North Carolina Division of Water Quality 1617 Mail Service Center Raleigh, NC 27699-1617 Phonc [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 Number: NC0020231
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 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,
Town of Louisburg
is hereby authorized to discharge wastewater from a facility located at
Tar River Water Reclamation Facility
NC Hwy 56 East
Franklin County
to receiving waters designated as Tar River in the Tar -Pamlico River Basin in accordance with effluent
limitations, monitoring requirements, and other conditions set forth in Parts I, II, III and 1V hereof.
This permit shall become effective October 1, 2004.
This permit and authorization to discharge shall expire at midnight on September 30, 2009.
Signed this day September 14, 2004.
ORIGINAL SIGNED BY
Mark McIntire
Alan W. Klimek, P.E., Director
Division of Water Quality
By Authority of the Environmental Management Commission

Permit Number: NC002023 1
SUPPLEMENT TO PERMIT COVER SHEET
All previous NPDES Permits issued to this facility, whether for operation or discharge are hereby revoked. As of this
permit 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 included herein.
Town of Louisburg
is hereby authorized to:
1. Continue operation of an existing 1.37 MGD wastewater treatment plant consisting of the following unit
processes:
• Mechanical barscreen
• Aerated grit/grease removal
• Anaerobic selector
• Dual oxidation ditches (BioDeNioPho Process)
• Dual secondary clarifiers
• Three cell tertiary filter
• Ultraviolet disinfection
• Sludge thickener
• Aerobic digester
• Ultrasonic flow meter
The facility is located at the Tar River Water Reclamation Facility, NC Hwy 56 East, southeast of
Louisburg, Franklin County
2. Discharge treated wastewater from said treatment works at the location specified on the attached map
through outfall 001 into the Tar River that is classified WS-V NSW waters in the Tar -Pamlico River Basin.

Facility Information
Latitude:
Longitude:
Quad #:
Stream Class:
Receiving Stream:
Permitted Flow:
36°05'12"
78°17'32"
C25SE
WS-V NSW
Tar River
1.37 MGD
Sub -Basin:
03-03-01
Facility
Location
Location
North
Town of Louisburg
NC002023I
Tar River Water Reclamation Facility

Permit Number: NC0020231
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(s) 001. Such discharges shall be limited and
monitored by the Permittee as specified below:
Effluent Characteristics
Limits
Monitoring Requirements
Monthly
Average
Weekly
Average
Daily
Maximum
Measurement
Frequency
Sample Type
Sample
Location 1
Flow
1.37 MGD
Continuous
Recording
I or E
CBOD, 5-day, 20°C2
(April 1 - October 31)
8.0 mg/L
12.0 mg/L
3/Week
Composite
I, E
CBOD, 5-day, 20°C2
(November 1- March 31)
16.0 mg/L
24.0 mg/L
3/Week
Composite
I, E
Total Suspended Solids2
30.0 mg/L
45.0 mg/L
3/Week
Composite
I, E
NH3-N
(April 1 - October 31)
3.0 mg/L
9.0 mg/1
3/Week
Composite
E
NH3-N
(November 1- March 31)
6.0 mg/L
18.0 mg/1
3/Week
Composite
E
Dissolved Oxyg.en3
3/Week
Grab
E
Fecal Coliform
200/100 ml
400/100 ml
3/Week
Grab
E
Conductivity
3/Week
Grab
E
pH
6.0 - 9.0 standard units
3/Week
Grab
E
Temperature, °C
Daily
Grab
E
Total Nitrogen as N5
Monthly
Composite
E
Total Phosphorus as P5
Monthly
Composite
E
Chronic Toxicity6
Quarterly
Composite
E
Temperature, °C
Variables-
Grab
U, D
Dissolved Oxygen
Variable'
Grab
U, D
Pollutant Analysis$
Annually
Composite
E
Footnotes:
1. Sample Location: E - Effluent, I - Influent, U - Upstream 100 feet from the outfall, D - Downstream of outfall
at NCSR 1001.
2. The monthly average effluent CBOD5 and Total Suspended Solids concentrations shall not exceed 15% of the
respective influent value (85 % removal).
3. The daily average dissolved oxygen effluent concentration shall not be less than 5.0 mg/1.
4. Fecal Coliform shall be calculated using the geometric mean, according to the procedure detailed in Part II.
Section A, Paragraph 9b.
5. See Special Condition A. (3).
6. Chronic Toxicity (Ceriodaphnia) P/F at 13%: March, June, September, and December. See Special Condition
A. (2).
7. Sample collected three times per week during June 1 through September 30 and once per week October 1
through May 31. Upon initiation of stream sampling by the Tar -Pamlico River Basin Association, the instream
monitoring requirements as stated in this permit are waived. Should your membership in the Association be
terminated, you shall notify the Division immediately and the instream monitoring requirements specified in
your permit shall be reinstated.
8. See Special Condition A. (4).
There shall be no discharge of floating solids or visible foam in other than trace amounts.

Permit Number: NC0020231
A. (2). CHRONIC TOXICITY PERMIT LIMIT (QRTRLY)
The effluent discharge shall at no time exhibit observable inhibition of reproduction or significant mortality to
Ceriodaphnia dubia at an effluent concentration of 13%. •
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: North Carolina Division of Water Quality
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.

Permit Number: NC0020231
A. (3). TOTAL NITROGENITOTAL PHOSPHORUS REQUIREMENTS
For Association members: Limits on total phosphorus and total nitrogen have not been included at this time because
the facility is participating in the nonpoint source trading option outlined in the Tar Pamlico NSW Implementation
Strategy Phase II, which was adopted December 8, 1994. If compliance with any element of this strategy, or
subsequent approved revisions to the strategy is not maintained, the Division reserves the right to reopen this permit
to include nutrient limits. If requirements other than those listed in this NPDES permit are adopted as part of a
future revision to the strategy, the Division reserves the right to reopen this permit to include these requirements.
A. (4). MERCURY MONITORING
Within the first year of this permit, permittee will collect three effluent samples, which shall be analyzed for
Mercury using EPA Method 1631 and the results submitted to the Division. The Division reserves the right to re-
open this permit and include additional mercury requirements if these results indicate water quality concerns.

i
Permit Number: NC0020231
A. (5). POLLUTANT ANALYSIS
The Permittee shall perform an annual Effluent Pollutant Scan for all parameters listed in the
attached table. 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. Samples shall represent seasonal variations. Unless
otherwise indicated, metals shall be analyzed as "total recoverable."
Ammonia (as N) Trans-1,2-dichloroethylene Bis (2-chtoroethyl) ether
Chlorine (total residual, TRC) 1,1-dichloroethylene Bis (2-chloroisopropyl) ether
Dissolved oxygen 1,2-dichloropropane Bis (2-ethylhexyl) phthalate
Nitrate/Nitrite 1,3-dichloropropylene 4-bromophenyl phenyl ether
Kjeldahl nitrogen Ethylbenzene Butyl benzyl phthalate
0i1 and grease Methyl bromide 2-chloronaphthalene
Phosphorus Methyl chloride 4-chlorophenyl phenyl ether
Total dissolved solids Methylene chloride Chrysene
Hardness 1,1,2,2-tetrachloroethane Di-n-butyl phthalate
Antimony Tetrachloroethylene Di-n-oclyl phthalate
Arsenic Toluene Dibenzo(a,h)anthracene
Beryllium 1,1,1-trichloroethane 1,2-dichlorobenzene
Cadmium 1,1,2-trlchloroethane 1,3-dichlorobenzene
Chromium Trichloroethytene 1,4-dichlorobenzene
Copper Vinyl chloride 3,3-dichlorobenzidine
Lead Acid -extractable compounds: Diethyl phthalate
Mercury P-chloro-m-creso Dimethyl phthalate
Nickel 2-chtorophenol 2,4-dinitrotoluene
Selenium 2,4-dichlorophenol 2,6-dinitrotoluene
Silver 2,4-dimethylphenol 1,2-diphenylhydrazine
Thallium 4,6-dinitro-o-cresol Fluoranthene
Zinc 2,4-dinitrophenol Fluorene
Cyanide 2-nitrophenol Hexachlorobenzene
Total phenolic compounds 4-nitrophenol Hexachlorobutadlene
Volatile omanic compounds: Pentachtorophenol Hexachlorocydo-pentadiene
Acrolein Phenol Hexachloroethane
Acrylonitrile 2,4,6-trichlorophenol Indeno(1,2,3-cd)pyrene
Benzene Base -neutral compounds: lsophorone
Bromoform Acenaphthene Naphthalene
Carbon tetrachloride Acenaphthylene Nitrobenzene
Chlorobenzene Anthracene N-nitrosodi-n-propylamine
Chlorodibromomethane Benzidine N-nitrosodimethylamine
Chloroethane Benzo(a)anthracene N-nitrosodiphenylamine
2-chloroethyivinyl ether Benzo(a)pyrene Phenanthrene
Chloroform 3,4 benzofluoranthene Pyrene
Dichlorobromomethane Benzo(ghi)perylene 1,2,4-trichtorobenzene
1,1-dichtoroethane Benzo(k)fluoranthene
1,2-dichloroethane Bis (2-chloroethoxy) methane
Test results shall be reported to the Division in DWQ Form- A MR-PPA1 or in a form approved
by the Director within 90 days of sampling. The report shall be submitted to the following
address:
NC DENR / DWQ / Central Files, 1617 Mail Service Center, Raleigh, North Carolina 27699-
1617.

MEMORANDUM
To:
From:
Subject:
July 21, 2004
Michael Douglas
NC DENR / DEH / Regional Engineer
Raleigh Regional Office
Dawn Jeffries
NPDES Unit
Review of Draft NPDES Permit NC0020231
Tar River Water Reclamation Facility
Michael F. Easley, Govemor
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
Please indicate below your agency's position or viewpoint on the draft permit and return this form by August
27, 2003. If you have any questions on the draft permit, please contact me at telephone number (919) 733-
5083, extension 595 or via e-mail at [e-mail].
RESPONSE: (Check one)
Fr -
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 - TELEPHONE [phone]/FAX [phone]
VISIT US ON THE WEB AT http://h2o.enr.state.nc.us/NPDES

UNITED STATES ENVIRONMENTAL PROTECTION AGENCY
REGION 4
ATLANTA FEDERAL CENTER
61 FORSYTH STREET
ATLANTA, GEORGIA 30303-8960
AUG 0 9 2U04 M
Ms. Dawn Jeffries
North Carolina Department of Environment and
Natural Resources
Division of Water Quality
NPDES Unit
1617 Mail Service Center
Raleigh, NC 27699-1617
SUBJ: Draft NPDES Permit
Louisburg WWTP
Permit No. NC0020231
Dear Ms. Jeffries:
r- f
AUG 1 1 2004 k'�'
QERR - WATER QUALITY
POINI SOURCE BRANCH
In accordance with the EPA/NCDENR MOA, we have completed review of the draft permit
referenced above and have no comments. We request that we be afforded an additional review
opportunity only if significant changes are made to the draft permit prior to issuance or if significant
comments objecting to it are received. Otherwise, please send us one copy of the final permit when
issued.
Sincerely,
Marshall Hyatt, Environmental Scientist
Permits, Grants, and Technical Assistance Branch
Water Management Division
Internet Address (URL) • http://www.epa.gov
Recycled/Recyclable • Printed with Vegetable Oil Based Inks on Recycled Paper (Minimum 30% Postconsumer)

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,ifraTTkY1tI tmt$
PUBLIC NOTICE
STATE OF NORTH CAROLINA
ENVIRONMENTAL
MANAGEMENT
COMMISSION/NPDES UNIT
1617 MAIL SERVICE CENTER
RALEIGH, NC 27699-1617
NOTIFICATION OF INTENTTO
ISSUE A NPDES WASTEWATER
PERMIT
0n the basis of thorough staff
review and application of NC Gen-
eral Statute 143.21, Public law 92-
500 and other lawful standards and
regulations, the North Carolina Envi-
ronmental Management Commis-
sion proposes to issue a National
Pollutant Discharge Elimination Sys-
tem (NPDES) wastewater discharge
permit to the person(s) listed below
effective 45 days from the publish
date of this notice.
The Town of Louisburg, 110 West
Nash Street, Louisburg, North Caro-
lina 27549 has applied for renewal
of NPDES permit NC0020231 for its
Louisburg WWTP in Franklin Coun-
ty. This permitted facility discharges
treated wastewater to the Tar River
in the Tar -Pamlico River Basin. Cur-
rently, CBOD and ammonia nitrogen
are water quality limited. This dis-
charge may affect future allocations
in this portion of the watershed.
Written comments regarding the
proposed permit will be accepted
until 30 days after the publish date
of this notice. All comments re-
ceived prior to that date are consid-
ered in the final 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 receive a signifi-
cant degree of public interest.
Copies of the draft permit and
other supporting information on file
used to determine conditions pres-
ent in the draft permit are available
upon request and payment of the
costs of reproduction. Mail com-
ments and/or requests for informa-
tion to the NC Division of Water
Quality at the above address or call
Ms. Carolyn Bryant at (919) 733-
5083, extension 520. Please include
the NPDES permit number (attach-
ed) in any communication. Interest-
ed persons may also visit the Divi-
sion of Water Quality at 512 N. Sal-
isbury Street, Raleigh, NC 27604-
1148 between the hours of 8:00
a.m. and 5:00 p.m. to review inform•
tion on file.
PO Box 119, 109 S. Bickett Blvd., Louisburg, NC 2754S
Phone: [phone] • Fax [phone]
E-Mail: ads@thefr E-Mail: [e-mail]
AFFIDAVIT
North Carolina —Franklin County.
Donna S. Cunard Ad Manager
of
THE FRANKLIN TIMES, a newspaper published at Louisburg,
Franklin County, N.C., hereby certify that the advertisement of
Public Notice
Notification of Intent to Issue a NPDES Wastewater
Perrnit
a copy of which is hereto attached, appeared in the following
July 24, 04
issues of said publication: 20 •
20 ; 20 ;
20 ; 20
4th August
This the ,.day of
Subscribed and sworn to before me this4th day of
August 04
20
Notary Public.
/
My Commission Expires 20/09
res 20

North Carolina Wildlife Resources Commission
Charles R. Fullwood, Executive Director
MEMORANDUM
TO: Dawn Jefferies, NPDES Unit
Div' ion of Water Quality
S FROM: ShariBryant, ont Region Coordinator
Habitat Conservation Program
DATE: 23 August 2004
L
AUG 2 5 2004 RJ
-t 1Y
1
SUBJECT: Proposed Permit Renewal for the Town of Louisburg, Louisburg WWTP, Franklin
County, NPDES Permit No. NC0020231
Biologists with the North Carolina Wildlife Resources Commission have reviewed the subject
application for impacts to fish and wildlife. Our comments are provided in accordance with provisions of
the Clean Water Act of 1977 (as amended), the Fish and Wildlife Coordination Act (48 Stat. 401, as
amended; 16 U.S.C. 661-667d), and North Carolina General Statutes (G.S. 113-131 et seq.), and the
North Carolina Administrative Code 15A NCAC 10I.0102.
The Town of Louisburg has submitted a request for a permit renewal for its Louisburg WWTP to
discharge municipal wastewater into Tar River in the Tar -Pamlico River Basin. There are records for the
federal species of concern and state endangered yellow lance (Elliptio lanceolata), Atlantic pigtoe
(Fusconaia masoni), and yellow lampmussel (Lampsilis cariosa); the federal species of concern and state
special concern Carolina madtom (Noturus furiosus); the federal species of concern and state significantly
rare Roanoke bass (Ambloplites cavifrons); the state threatened notched rainbow (Villosa constricta); the
state special concern Neuse River waterdog (Necturus lewisi) and the state significantly rare mayfly
(Tortopus puella) in the Tar River. Additionally, there are records for the federal and state endangered
dwarf wedgemussel (Alasmidonta heterodon); the federal species of concern and state endangered yellow
lance (Elliptio lanceolata) and Atlantic pigtoe (Fusconaia masoni); and the state threatened triangle
floater (Alasmidonta undulata), creeper (Strophitus undulatus) and notched rainbow (Villosa constricta)
in Fox Creek which appears to confluence with Tar River near the WWTP discharge.
From the information provided, it appears that ammonia nitrogen is water quality limited. We
have concerns regarding ammonia concentrations. Freshwater mussels are among the most sensitive
aquatic organisms tested for impacts from ammonia, and ammonia may be a significant limiting factor for
unionids (Augspurger et al., 2003). Recent research by Augspurger et al. (2003) found that ammonia
concentrations which may be protective of freshwater mussels range from 0.3 to 1.0 mg/L total ammonia
as N at pH 8. It is unclear whether this WWTP utilizes chlorine systems for disinfection. Chlorine is
acutely toxic to aquatic organisms and forms secondary compounds that are detrimental to aquatic life.
Mailing Address: Division of Inland Fisheries • 1721 Mail Service Center • Raleigh, NC 27699-1721
Telephone: [phone] ext. 281 • Fax: [phone]

Page 2
23 August 2004
Town of Louisburg - Louisburg WWTP
NPDES No. NC0020231
We recommend that the following conditions be incorporated into the permit to reduce impacts to
fish and wildlife resources and in particular to listed species.
1. If -the plant utilizes chlorine systems, we suggest that the chlorine systems be replaced by
ultraviolet light or ozone systems. Lout 5±..)14 rs des (.0/ ✓
2. We recommend a reevaluation 4fammonia limits based on the research discussed above and
readjusting the limits. Please contact Tom Augspurger with the U.S. Fish and Wildlife Service at
[phone] for additional information. ; s qs la,0 as . gl H `1-4-w-i .S Sfi' d tso' -
3. If not already in place, we suggest the installation of a stand-by power system.
Thank you for the opportunity to provide input during the planning stages for this project. If we
can be of further assistance, please contact our office at [phone].
Literature cited
Augspurger, T., A. E. Keller, M. C. Black, W. G. Cope, and F. J. Dwyer. 2003. Derivation of water
quality guidance for protection of freshwater mussels (Unionidae) from ammonia exposure.
Environmental Toxicology and Chemistry 22(11):2569-2575.
cc: Tom Augspurger, USFWS Raleigh
E-mail: Sarah McRae, NHP
Angie Rodgers, WRC

Louisburg NC002023 1
Subject: Louisburg NC0020231
Date: Thu, 26 Aug 2004 08:49:27 -0400
From: Barry Herzberg <[e-mail]>
To: "Jeffries, Dawn " <[e-mail]>
Dawn:
Confirming our conversation, please revise the Louisburg permit to
include "Mechanical Barscreen" in the equipment list. This equipment is
part of the plant description provided by the Town in their renewal package.
Thanks, and it was good talking to you.
Barry
1 of 1 8/26/2004 8:51 AM

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Draft Permit reviews (3)
Subject: Draft Permit reviews (3)
Date: Mon, 30 Aug 2004 14:14:38 -0400
From: John Giorgino <[e-mail]>
To: Dawn Jeffries <[e-mail]>
Hi Dawn, I have reviewed the following Draft Permits:
NC0023337 (Scotland Neck WWTP)- no comments.
NC0020231 (Louisburg WWTP)- no comments
NC0049514 (Pilkington) - no comments.
Thank you for forwarding them to me.
-John
John Giorgino
Environmental Biologist
North Carolina Division of Water Quality
Aquatic Toxicology Unit
Mailing Address:
1621 MSC
Raleigh, NC 27699-1621
Office: 919 733-2136
Fax: [phone]
Email: John.Giorgino®ncmail.net
Web Page: http://www.esb.enr.state.nc.us
I of 1 8/30/2004 2:20 PM

Louisburg, NC0020231
Subject: Louisburg, NC0020231
Date: Fri, 06 Aug 2004 09:53:44 -0400
From: Dawn Jeffries <[e-mail]>
Organization: NC DENR DWQ
To: [e-mail]
Marshall,
Thanks for the comments. It took a few phone calls to work through,
partly because closer scrutiny of the PPAs revealed another problem.
The 3/16 submission was not complete. The end result was that the March
10 and the May 11 PPAs were correct. The March 16 was not and the
consultant could not really explain it. The facility conducted another
PPA in July and will foward the results when they receive them.
Regarding your comments:
1. I have explained to the consultant that the 3 Hg samples were not
analyzed by the acceptable method, and must be resampled within the
first year of the permit. This will be included as a special condition.
2. Part D of the application is not adequately completed as far as
detection limits, but since the detection limits are indicated on the
PPA reports, I informed the consultant that in the future he should be
sure to transfer all the information properly to the application.
3. Fecal coliform instream monitoring Division Policy memo is attached.
4. Oil and grease monitoring is no longer required to be conducted
monthly (since this is not a typical requirement for a 100% domestic
wastewater municipal permit), but the annual requirement to monitor for
it in the PPA has not been altered. That should fulfill the requirement
in Form 2A. FaGk skwt-
5. Footnote 2 on effluent page has been corrected.
6. Footnote 3 on the ammonia parameter has been corrected.
7. Total Nitrogen and Total Phosphorus have been changed to Total
Nitrogen as N and Total Phosphorus as P.
8. The reference in the fact sheet to a Hg reopener should have been to
a nutrient reopener special condition (Special Condition A.(3.)). This
has been corrected.
Thanks,
Dawn Jeffries
r
fecal and conductivity monitoring.doc
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1 of 1 8/6/2004 9:54 AM

Tar Pam permitting
Subject: Tar Pam permitting
Date: Thu, 05 Aug 2004 09:11:25 -0400
From: Teresa Rodriguez <[e-mail]>
To: "DENR.NPDES.DWQ" <[e-mail]>
Please insert the following language in the instream monitroing footnotes for the permits listed
below if they have instream monitoring:
"Upon initiation of stream sampling by the Tar -Pamlico River Basin Association, the instream
monitoring requirements as stated in this permit are waived. Should your membership in the
Association be terminated, you shall notify the Division immediately and the instream
monitoring requirements specified in your permit shall be reinstated."
List of facilities participating in the Tar -Pamlico Basin Association:
NC0001627 National Spinning
NC0020061 Town of Spring Hope
NC0020231 Town of Louisburg
NC0020435 Town of Pinetops
NC0020605 Town of Tarboro
NC0020648 City of Washington
NC0020834 Town of Warrenton
NC0023337 Town of Scotland Neck-
NC0023931 Greenville Utilities Commission
NC0025054 City of Oxford
NC0025402 Town of Enfield
NC0026042 Town of Robersonville
NC0026492 Town of Belhaven
NC0030317 City of Rocky Mount
NC0042269 Town of Bunn
NC0069311 Franklin County
1 of 1 8/6/2004 10:19 AM

comments on NC0020231, Town of Louisburg
•
Subject: comments on NC0020231, Town of Louisburg
Date: Wed, 04 Aug 2004 08:41:16 -0400
From: [e-mail]
To: [e-mail]
CC: [e-mail]
3
hope these are useful. Marshall
/ The permit application is dated April 2004. The Hg data reported in
and the subsequent 2 samplings used a detection method of 0.2 ug/1
and Method 245.1. As of September 2003, all Hg data submitted to NC are
supposed to use Method 1631. Will you add a monitoring -t- en �oitdCilt^
requi.r' _that at least 3 samples for HQ using Method 1631 be submitted
within the first year of the permit to make up for this deficiency? V(r f7-(-fv ik /etk��o
The Detection limits fo all non-metal data in Part D of the permit
pplication arr missing Reporting the detection limits when a given y[ T
sample is non -detect is a mandatory requirement of Form 2A. Can you
obtain this info from the Town? In the future, the application should
not be considered complete w/o such info.
3. If the City only treats domestic waste, I don't understand why fecal
coliform illstream monitoring is being discontinued. Pls explain. 4..PinCQ k-v1
4. The fact sheet
discontinued. Pls
and should require
Part A.1:
indicates oil and grease monitoring is being h�u"{CC��p1.t-l4
know that F.rm 2A .nd Part A. of the permit require m,t
that oil and grease monitoring be conducted. tpyt `
a w+"4 P - no .tftec( of mo•..t
5. Footnote 2, "total suspended residue" should be "total suspended
solids". — COn reck
6. Both ammonia parameters have a footnote 3. Because that refers to
DO, footnote 3 for ammonia should be deleted. .
7. Recommend that total nitrogen be expressed
phosphorus as "as P.
as "as N" and total v3i„g
8. The fact sheet mentions a Hg reopener, but I did not see one in the
permit. What is it supposed to say?
rC o 2Qinui4 9 'Con 1, 13
r nu-fr 11
066
7H
1 of 1 8/4/2004 8:58 AM

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DENR/DWQ
FACT SHEET FOR NPDES PERMIT DEVELOPMENT
NPDES No. NC0020231
Facility Information
Applicant/Facility Name:
Town of Louisburg
Applicant Address:
110 West Nash Street
Facility Address:
NC Hwy 56 East
Permitted Flow
1.37 MGD
Type of Waste:
Domestic
Facility/Permit Status:
Renewal
County:
Franklin
Miscellaneous
Receiving Stream:
Stream Classification:
303(d) Listed?:
Tar River
WS-V NSW
No
Regional Office:
USGS Topo Quad:
Permit Writer:
Raleigh
C25SE
Dawn Jeffries
Subbasin:
03-03-01
Date:
June 22, 2004
Drainage Area (mi2):
437
Summer 7Q10 (cfs)
14
Winter 7Q 10 (cfs):
Average Flow (cfs):
460
IWC (%):
13
Primary SIC Code:
4952
SUMMARY
The Louisburg WWTP is located on North Carolina Highway 56 East, south of Louisburg in Franklin
County. The facility has a permitted flow of 1.37 MGD, which discharges through one outfall (001).
The treatment plant is equipped with the following unit processes: aerated grit/grease removal, anaerobic
selector, dual oxidation ditches (BioDeNioPho Process), dual secondary classifiers, 3 cell tertiary filters.
UV disinfection, sludge thickener, aerobic digester and ultrasonic flow meter.
The facility discharges into the Tar River in the Tar -Pamlico River Basin. At the point of discharge the
Tar River is classified as WS-V NSW waters.
The Town of Louisburg has had no compliance problems over the past four years and according to the
staff and compliance inspection reports appears to be well maintained and operated.
At the last permit renewal (April 2000), a limit for lead was added due to data indicating reasonable
potential to exceed water quality standards. In September 2000. a modification was issued at the request
of the permit holder that eliminated the limit and reduced monitoring due to data indicating no
reasonable potential to exceed the standard.
The facility treats 100% domestic waste and has no significant industrial users. It accepts domestic waste
(but no process waste) from Cal -Maine Food, Inc. and Murphy House Package Plant.
DMR Data Review
DMR data (monthly averages) from Jan 2002 through April 2004 were reviewed and are
summarized in Table 1.
Max
Min
Flow Temp DO SOD TSS Fecal NH,-N TN TP
(MGD) (°C) (mg/L) (mg/L) (mg/L) (#/100 mL) (mg/L) (mg/L) (mg/L)
1.00
0.52
27.6
10.7
11.2
6.8
3.5
<2.0
8.1
1.1
11.3
1.0
1.95
O.18
5.99
1.21
0.51
0.08
Table 1. NC0020231 Conventional Data (May 2002-May 2004)
I 0 is ui i_uui.hur>. NC:002023I. Iact Shut
NI'I)I:S l'crntit Reno,. al
I', ec 1

TOXICITY TESTING:
Current Requirement: Quarterly Chronic Toxicity (Ceriodaphnia) P/F at 13%.
Recommended Requirement: Quarterly Chronic Toxicity (Ceriodaphnia) P/F at 13%.
COMPLIANCE SUMMARY:
A review of the files from 2002-2004 shows that the facility had no compliance problems. Compliance
Evaluation Inspections in August 2002 and October 2003 indicated no problems. All toxicity tests
conducted since 2000 have been passed.
INSTREAM MONITORING:
Currently, the facility is required to monitor fecal coliform, dissolved oxygen, temperature, and
conductivity, upstream and downstream of the outfall three times per week during June, July, August and
September and once per week during the rest of the year. The upstream location is 100 feet upstream of
the outfall and the downstream location is at NCSR 1001. Since the facility treats only domestic waste,
instream monitoring for fecal coliform and conductivity will be removed per Division policy.
PERMITTING STRATEGY:
Waste Load Allocation (WLA)
The Division prepared the last WLA in 1991. The previous and current effluent limits were based on
guidelines and water quality standards. The Division has judged previous parameters and limits to be
appropriate for renewal with some exceptions. Changes to toxicant monitoring are discussed in the
Reasonable Potential Analysis section. Weekly average ammonia limits based on a 3:1 ratio with the
monthly average will be implemented in this permit. This is a new statewide policy that resulted from
EPA requirements. The resulting summer weekly average limit will be 9.0 mg/L and the winter limit
will be 18.0 mg/L. In addition, an annual pollutant scan will be added such that the Permittee can collect
the necessary data required by EPA Form 2A throughout the permit term. This condition is now
standard on all major municipal permits in North Carolina. Lastly, the monitoring of oil and grease was
included in past permits for this facility due to industries contributing small amounts of process
wastewater. The facility now treats only domestic waste, so the/oil and grease monitoring requirement is
no longer necessary and will be removed with this renewal. ` °
S O f1 ct Grease "►• ust sfii CL&AFel #1- . a-4-Thai
P4
Reasonable Potential Analysis (RPA)
The Division conducted EPA -recommended analyses to determine the reasonable potential for toxicants
to be discharged by this facility, based on DMR data from April 2002-April 2004. Calculations included
lead, which was listed in the previous permit. Results suggest no reasonable potential for the facility to
discharge lead in amounts that would violate water quality standards. All recorded values for the last
two years have been Less than detection level. Therefore, the NPDES permit renewal for this facility
contains no monitoring requirements for lead.
PROPOSED CHANGES:
In keeping with Division policies, the following will be incorporated into the permit:
• Addition of weekly average ammonia limits (both summer and winter)
• Addition of Annual pollutant scan
• Removal of monitoring requirement for lead
• Removal of monitoring requirements for oil and grease
• Removal of instream monitoring requirements for fecal coliform and conductivity
• -Re-open
110-{-f i zy
Town oI1_ouisbur<,. \( i)()2O231 tact
N!'I)L S P.1nnut

PROPOSED SCHEDULE FOR PERMIT ISSUANCE:
Draft Permit to Public Notice: July 21, 2004
Permit Scheduled to Issue: September 13, 2004
STATE CONTACT:
If you have any questions on any of the above information or on the attached permit, please contact
Dawn Jeffries at [phone] ext. 595.
NAME: DATE:
REGIONAL OFFICE COMMENT:
NAME: DATE:
SUPERVISOR: DATE:
•fown of Louisburg. \('O)'(�? f (ac, Sheet
NPI) S`PeRnit ;!
Page

REASONABLE POTENTIAL ANALYSIS
Louisburg WWTP
NC0020231
Time Period 06/02 - 06/04
Ow (MGD) 1.37
7010S (cfs) 14
7010W (cfs) 48
3002 (cfs) 0
Avg. Stream Flow. QA (cfs) 460
Rec'ving Stream Tar River
WWTP Class III
IWC (%) @ 7010S 13.17
@ 7010W 4.2365
3002 N/A
@ QA 0.4595
Stream Class WS-V NSW
Outfall 001
Qw=1.37MGD
PARAMETER
TYPE
(1)
STANDARDS &
CRITERIA (2)
P0L
Units
REASONABLE POTENTIAL RESULTS
RECOMMENDED ACTION
NC WOS / 34FAV/
Chronic Acute
n 0 OeL Max Prat Cw Allowable Cw
Lead
NC
25 N 33.8
ug/L
25 0
2.9
Acute: 34
_ _ _ _ _ _ _ _ _
Chronic: 190
No sources, no pretreatment program.
All values LTD, No_Reasonable Potential. Remove _ _ _ _
monitoring requirement from permit.-
• Legend:
C = Carcinogenic
NC = Non -carcinogenic
A = Aesthetic
" Freshwater Discharge
rpa.xls, rpa
6/28/2004

REASONABLE POTENTIAL ANALYSIS
Lead
Date Data BDL=1/2DL Results
1 Apr '04 < 5 2.5 Std Dev. 0.2769
2 Mar '04 < 5 2.5 Mean 2.4200
3 Feb'04 < 3 1.5 C.V. 0.1144
4 Jan '04 < 5 2.5 n 25
5 Dec'03 < 5 2.5
6 Nov '03 < 5 2.5 Mult Factor = 1.1700
7 Oct '03 < 5 2.5 Max. Value 2.5 ug/L
8 Sep '03 < 5 2.5 Max. Pred Cw 2.9 ug/L
9 Aug'03 < 5 2.5
10 Jul '03 < 5 2.5
11 Jun'03 < 5 2.5
12 May '03 < 5 2.5
13 Apr'03 < 5 2.5
14 Mar'03 < 5 2.5
15 Feb '03 < 5 2.5
16 Jan'03 < 5 2.5
17 Dec'02 < 5 2.5
18 Nov '02 < 5 2.5
19 Oct'02 < 5 2.5
20 Sep '02 < 5 2.5
21 Aug '02 < 5 2.5
22 Jul '02 < 5 2.5
23 Jun'02 < 5 2.5
24 May'02 < 3 1.5
25 Apr'02 < 5 2.5
26
27 r"?
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
199
200
•
rpa.xls, data
6/28/2004

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Whole Effluent Toxicity Testing Self -Monitoring Summary
FACILITY REQUIREMENT
June 15, 2004
YEAR JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC
Linville Resorts, Inc. chr lira: 7%: ifcxp to 0.15 chr lim 10% 2000 - -• -- - -- -
NC0039446/0111 Bcgin:12/1/20011 Frequency: Q Jan Apr Jul Oct + NonConlp:Singlc 2001 Pass Pass Pass Pass
County: Avery Region: ARO Subbasin: CTB30 2002 Pass Pass - Pass - Pass
PF: 0.10 Special 2003 Pass - Pass - - Pass -- - Pass
7QI0: 2.1 1WC(%) 10.0 Ord,: 2004 Pass -- -- Pass
Lithium Carp chr lira: 78%:pf 0.7 chr lira 80%;pf 0.8 ehr lim 82%;pf 0.9 chr 1i Y 2000 >100 >100 - - >100 - -- >100
NC0005177/001 Begin: I I/1/2003 Frequency: Q Jan Apr Jul Oct + NanComp:Single 2001 >100 >100 - H >100 - >100
County: Gaston Region: MRO Subbasin: CT1037 2002 >100 >100 - H H H H
PF: 0.615 Special 2003 88.3 >100 44.2 57 >100 88.3
7Q10: 0.27 IWC(%) 78 Order 2004 88.3 >100
>100
Livingstone Coating Corporation chr tiro: 90%
NC0086002/0U1 Begin3/I@004 Frequency: Q Jan Apt Jul Oct
County: Mecklenburg Region: MRO Subbasin: CT634
PF: 0.0216 Special
7010: 0.0 RVC(%) 101) Order:
+ NonCotnp:Single
2000 Pass -- Pass - Pass - Pass
2001 Pass Pass - Pass - Pass
2002 Pass -- Pass - - Pass Pass
2003 Pass - -- Pass - Pass Pass
2004 NR Pass Pass
Louis Dreyfus Energy Corp. 24 hr LC50 ac mobil epis tlhd (grab)
NC0021971/11119 Begin 9/1/211111 Frequency: A
County: Mecklenburg Region: MRO Subbasin: CTI334
PF: VAR Sprain'
7Q10: 0.0 IWC(%) 100 Order:
NonComp:
2000 __ - - >100
2001 -- >100
2002 - >100
2003 - -
2004 -
>100
Louisburg WWTP chr lim: 13% 2000 - - Pass - Pass Pass --- Pass
NC0020231/00I Begin-5/1/2000 Frequency: Q Mar Jun Scp Dec + NonComp:Singlc 2001 - - Pass Pass Pass --- Pass
County: Franklin Region: RRO Subbasin: TARO) 2002 - Pass - - Pass - Pass - Pass
PF: 1.37 Special 2003 - - pass -- - Pass Pass Pass
7Q10: 14.0 IWC(%) 13 (miff: 2004 - - Pass,>26
Lowell WWTP chr lira: 0.74%
NC0025861/I1111 Bcgin.3/l/2002 Frcqucncy: Q Feb May Aug Nov
County: Gaston Region: MRO Subbasin:CT636
IT: 0.6 Special
7Q10: 124.0 IWC(%) 0,74 (kdcr:
+ NonComp:Singlc
2000 - >100
2001 --- >100
2002 -- >100
2003 -_ Pass
Pass
Pass
>100
Late
Fail
Pass
>100
>3.0
>100
>100
>3.0.Pass --
Pass
NR/>100
8.8
Pass
Pass
>100
Lucent Technologies, Inc. chr lira: 90%
NCIII180853/00 I Begin.9/1/1999 Frequency: Q Mar Jun Scp Dcc
County: Forsyth Region: WSRO Subbasin: YAD114
PI': 0.302 Special
7010: 0.05 IWC(%) 90 Order:
` NanComp:Single
- Pass -- --- Pass Pass -- -- Pass.Pass
2001 -•• Pass --- Pass Pass -- -- Pass
2002 -- Pass --- Pass Pass Pass
2003 __ Pass -- --- Pass -•• Pass --- Pass
2004 -- Pass
Lumberton WWTP chr lim: 21% Y 2000 - Pass --- •-- Pass -•- Pass --- --- Pass
NC0024571/00I Begin.I/1/2001 Frequency: Q Feb May Aug Nov + NonComp:Singlc 2001 -- Pass - -- Pass --- Pass --- --- Pass
County: Robeson Region: FRO Subbasin: LUM51 2002 -- Pass -- Pass •- •- Pass Pass
PF: 20 Special 2003 - Pass - Pass Pass -- Pass
7010: 120 IWC(%) 21 Ord.': 2004 -- Pass,>42 - Pass
Magellan Selma Terminal 24hr LC50 ac monk epic Rhd
NC1052311/00I Begin:3/1/2004 Frequency: A
County: Johnston Region: RRO Subbasin: NEU02
PF: -• Special
7Q 10: 0.0 IWC(%) 100.0 Order:
NonComp:
2000 - >100
2001 - >100
2002 -- >100
2003 __ >100
2004 - 18.2
Maggie Valley WWTP chr lim: 6 %
NC0056561/001 13cgin:4/I/2002 Frequency.. Q Jan Apr Jul Oct
County: Haywood Region: ARO Subbasin: FRB05
PE: 1.0 Sp Biel
7QI 0: 23.0 1WC(%) 6.3 Order:
+ NonCamp:Singlc
2000 Pass - Pass - Pass - Pass
2001 Pass - Pass - Pass - -- Pass
2002 NR/Pass Pass - Pass - Pass
2003 pas, Pass - Pass - Pass
2004 Pass •- Pass
Maiden WWTP chr lim: 11%
NC0039594/00I Begin:1/1/2(I0I Frequency: Q Jan Apr Jul Oct
Counly: Catawba Region: MRO Subbasin: CTB35
PF: 1.0 Spcial
7Q10: 12.0 IWC(%) I I
• NonComp: Single
2000 Pass - Pass - Pass Pass -
2001 Pass.Pass - Pass Pass - - Pass -
2002 Pass -- Pass - -- Pass Pass
2003 Pass •- Pass - Pass Fail >44 >44
2004 Pass Pass
Mauteo WSVTP 24hr p/fac lim: 90% 2000 - Pass Pass Pass Pass
NC0079057/001 BeginI/1/2004 Frcqucncy:Q P/F + Feb May Aug Nov + NonCotnp:Single 2001 -- Pass Pass -- Pass - - Pass
County: Dare Region: WARO Subbasin: PAS51 2002 - Pass Pass Pass.Pass - - NR/Pass
PF: 0.6 Special 2003 - Pass Pass - Pass - Pass
7Q10:TIDAL IWC(%)NA Order: 2004 - Pass
Y Pre 2000 Data Available
LEGEND:
PERM = Permit Requirement LET = Administrative Letter - Target Frequency =Monitoring frequency: Q- Quancriyt 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 (efs) += quarterly monitoring increases to monthly upon failure or NR Months that testing must occur - es. Jan, Apr, Jul, Oct NonComp = Current Compliance Requirement
1'F= Permitted flow (MGD) IWC%= Instream waste concentration P/F= Pass/Fail test AC=Acute CHR=Chronic
Data Notation: f • Fathead tvlinnow: • - Ceriudaphnia sp.: my - Mysid shrimp: ChV - Chronic value: P - Mortality of slated percentage at highest concentration: at - Performed by DWQ Aquatic Tox Deli: bt - Bad test
Reporting Notation: -•- = Data not required: NR - Not reported Facility Activity Status: 1 - Inactive. N • Newly Issucd(To construct): H - Active but not discharging; 1-More data available for month in question; = ORC signature needed
26

AU# indicates that the assessment is smaller than the DWQ index segment. No letter indicates
that the assessment unit and the DWQ index segment are the same.
1.5.1 Cedar Creek [AU# 28-29-(2)b]
Current Status and 2004 Recommendations
The benthic bioclassification of lower Cedar Creek (12.15 miles) has been Good -Fair at site B-5
since 1990. The fish community bioclassification at site F-4 improved to Excellent in 2002. The
upper segment of Cedar Creek [AU# 28-29-(2)al receives a discharge from the Franklin WWTP
which had three WET test failures during the assessment period. This segment (6.18 miles) is
currently Not Rated. DWQ will work with Franklin WWTP to monitor and reduce the frequency
of WET test fails. Cedar Creek also crosses the rapidly growing area of NC 401 between
Raleigh and Louisburg. Water quality should be considered during planning and development
activities in this watershed.
1.5.2 Hatchers Run (Devin Lake) [AU# 28-11-3-(1)]
Current Status and 2004 Recommendations
Hatchers Run (Devin Lake) is a 98.9-acre impoundment west of Oxford that was a water supply
until 1993. During lake monitoring in 2002, the reservoir was stratified with hypoxic conditions
three meters from the surface. Chemical monitoring and observed green water color suggested
that algal blooms were occurring although the chlorophyll a criterion was not exceeded. Nutrient
levels were greater than observed in 1997, and copper was higher than the action level. Water
quality in Hatchers Run should be considered during land development activities, and BMPs
should be implemented on all land use activities to reduce the potential for algal blooms.
1.5.3 Tar River [AU# 28-(24.7)a]
Current Status and 2004 Recommendations
This 20.3-mile segment of the Tar River is currently Supporting because of Good -Fair and Good
bioclassifications at sites B-3 and B-4, respectively. The change in bioclassification at site B-3
(from Good in 1997) is likely related to the drought of 1998 to 2002 and does not indicate any
real changes in water quality. Water quality standards were not exceeded at sites A-3 and A-4.
DWQ will continue to monitor this segment of the Tar River. This area is experiencing growth
from the Neuse River basin to the south. Louisburg received a $252,000 CWMTF grant to
acquire 50 acres to add to the existing greenway system at Joyner Town Park. Louisburg has
also been offered a $2,295,500 grant through DWQ Construction Grants and Loans for
rehabilitation of the existing WWTP and a wastewater reuse project.
1.5.4 Billys Creek [AU# 28-20]
Current Status and 2004 Recommendations
The current use support rating of Billys Creek is No Data. Billys Creek has never been
monitored by DWQ; however, NCWRP has a planned project in this local watershed. This is
one of 27 local watersheds in the Tar -Pamlico River basin that has been identified by NCWRP as
an area with the greatest need and opportunity for stream and wetland restoration efforts. This
Section B: Chapter / - Tar -Pamlico River Subbasin 03-03-01 96

LOUISBURG
• MMMMM I= NM NM NM INN INS MINN MI
April 29, 2004
Mr. Dave Goodrich
NPDES Unit
Division of Water Quality
1617 Mail Service Center
Raleigh, NC 27699-1617
Re: NPDES Renewal Application
Water Reclamation Facility
Town of Louisburg, North Carolina
NC 0020231
Dear Mr. Goodrich:
Please find enclosed three (3) copies of the NPDES Renewal Application Form 2A for
the Town of Louisburg's Water Reclamation Facility. A check in the amount of
$2,865.00 has been included for the application fee. The Towns current NPDES Permit
is scheduled to expire on September 30, 2004. At your earliest convenience, please
review these documents for approval.
The application contains the results of one (1) set of the expanded effluent test data ant
the second species toxicity tests. The remaining three (3) samplings are scheduled
approximately a month apart. The results of these tests will be forwarded to you upon
receipt.
Town of Louisburg, 110 W. Nash St., Louisburg, N.C. 27549 • [phone] • FAX [phone]

If there are any questions or if additional information is needed, please do not hesitatefto
contact Mr. Jimmy Ellington, Superintendent, Water Reclamation Facility, Town o
Louisburg at [phone] or Mr. Steve Scruggs, P.E., Peirson & Whitman Architects
and Engineers, P.A. at [phone]
Sincerely,
Karl Pennell, Mayor
Enclosures:
Cc: Steve Scruggs, P.E., Peirson & Whitman

NPDES RENEWAL APPLICATION
WATER RECLAMATION FACILITIES
TOWN OF LOUISBURG
NC 0020231
May 2004
PEIRSON & WHITMAN ACHITECTS AND ENGINEERS, P. A. 1. 4
5510 Munford Road Raleigh, North Carolina 27612
SIXTY YEARS

!OUTLL No. 1 r
® 2902 D•Lorm.. 2.0 TopoQuads ®. Data copyright of cont.nt owner.
www.d.lormf.com

n
SLUDGE DISPOSAL FARM
TOWN OFtLOUISB.URG
=1�
DELORME
® 2002 Del.orme. 3-D TopoQueda ee. Date copyright of content owner.
www.delorrne. corn
e.o

PLANT INFLUENT
ADF=0.675 MGO
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C 3
LL
ccx
2a
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a
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19 J
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0.717 MGO
X 3
MAIN PUMP
STATION
SLUGDE
HOLDING TANK
FOR LAND
APPLICATION
BY-PASS
ANOXIC/MIXING BASIN
1
BAR SCREENS. fl'.oMGo/a.925 I D
GRIT & GREASE
REMOVAL
310 kW STAND-BY
GENERATOR WITH
1600 AMP ATS
SLUDGE
i...._ , ___ 1-1
r--- -I t
NE
DRYING BED W I
0 0
il—
EXIST. SAND '—Ill
I
F---{ORYING BED 1::: '—I c
1 EXIST. SAND
DRYING BED J
EXIST. SAND
PLANT
EFFLUENT
0.675 MGD CASCADE
AERATION
0.208 M&0
4,
o s,,,
j •o F
+Ne
Jl AF9wo
�'
THICKENER
BACKWASH WATER
60 GPM t
in] ®
ALUM STORAGE &
FEED PUMP
CAUSTIC SODA &
FEED PUMP
0.675 MGD
ULTRAVIOLET
DISINFECTION
FLOW SCHEMATIC
LOUISBURG WWTP
0.462 MGD
-wet
0.675 MGD
METERING
FLUME
0.925 MGD/0.0 MGD
ROTOR
(TYP . )
0.462 MGD
65' DIA.
SECONDARY
CLARIFIERS &
RETURN SLUDGE
PUMP STATION
0.358 MGD
TERTIARY
FILTERS
Owg No. 1816R1001
4/26/04 11: 37

WASTEWATER TREATMENT NARRATIVE
TOWN OF LOUISBURG
NPDES No. 0020231
The Town of Louisburg's 1.3755 MGD wastewater treatment plant biologically
removes total nitrogen and phosphorous by way of the Bio-Denipho process. The
treatment process includes pretreatment, biological secondary treatment, tertiary
filtration, disinfection, aerobic sludge digestion and sludge holding. Provided
below is a brief description of the treatment facilities.
1. Influent Pumps:
The three (3) non -clog influent pumps exist at the main lift station and are
equipped with variable frequency drives. The pumps were sized to meet
the maximum flow rate with one (1) unit out of service and designed to
provide a continuous flow to the treatment processes. Two (2) pumps
have a flow range of 1,000 to 2,000 gpm at a maximum head of 85 feet
and have 50-horsepower motors. The third pump has a flow range of
500 to 1,000 gpm at a maximum head of 60 feet and has a 25-horsepower
motor. The influent pumps pump to the bar screen units.
2. Bar Screen:
The bar screen facilities consist of one (1) mechanically cleaned bar
screen in one (1) channel and a manually cleaned bar rack in a bypass
channel. Each screen has a bar spacing of 3/8" and was designed for an
average flow of 1.5 MGD and a peak flow of 3.0 MGD. This mechanical
screen automatically discharges the screenings onto a conveyor, which
discharges into a dumpster. The screenings are disposed of at the County
Landfill.
3. Aerated Grit and Grease Removal:
An aerated grit and grease removal basin is located downstream of the bar
screen. The raw sewage contains grease that needs to be removed in order
for proper operation of the ultraviolet disinfection system and to meet the
speculative effluent limit of 30 mg/1. Grit washing was provided to
remove organics, and the washed grit will be discharged into a dumpster
or suitable container by way of a conveyor. A traveling skimmer is used
to remove the grease and dump it into a covered hopper. A bypass pipe
around the unit was installed. The basin was designed for an average flow
of 1.5 MGD and a peak flow of 3.0 MGD.
NPDES Application Louisburg's Wastewater Treatment Plant Page-1 of 4
Peirson & Whitman Architects and Engineers, P.A. Project No. 1816 May 2004

4. Bio-Denipho Process:
From the primary treatment processes, the wastewater flows to an
anaerobic tank, which is divided into three (3) chambers in series. For
mixing the returned sludge with the incoming sewage and in order to
avoid settling of sludge, each chamber is furnished with a mixer. In the
anaerobic tank, the phosphorous accumulating bacteria are prepared for
phosphorous accumulation under aerobic conditions in the oxidation
ditches. After the anaerobic tank, the wastewater flows to the distribution
chamber and further to the oxidation ditches in an alternating mode of
operation. The ditches operate in accordance with the principles of the
Bio-Denipho process with a very high degree of nitrogen, phosphorous,
and BOD removal. The process consists of two (2) ditches built together
as one (1) unit, so that the water is allowed to flow freely between them.
Mixers ensure that the wastewater is fully mixed, even when the rotors are
stopped. From the oxidation ditches, the water is led to the clarifier(s).
Return activated sludge (RAS) is pumped from the center of the
clarifier(s) back to the distribution chamber. The waste activated sludge
(WAS) is pumped to proposed aerobic sludge digester for further
treatment.
5. Return and Waste Sludge Pumps:
A return sludge pump station is used to recycle the sludge to the anaerobic
basin at the head of the oxidation ditches. Two (2) pumps were installed
in one common pump station. One pump is rated at 300 to 800 gpm and
has a 15 hp motor. The second pump is rated at 1,200 to 1,600 gpm and
has a 50 hp motor.
A 7.5-hp pump rated at 300 gpm is used to waste sludge to the aerobic
digester.
6. Clarifiers:
The floc formed in the denitrification process is settled out in two (2)
65' diameter clarifiers. Each clarifier has a 14' side water depth.
7. Chemical Storage and Feeding Equipment:
For a backup phosphorous removal system, the effluent would be treated
with alum just prior to the deep bed tertiary filters. Dual chemical feed
pumps are provided to feed liquid alum when necessary. The chemical
pumps and alum storage drums are housed in the caustic feed pump
building. This equipment would be used in case of a plant upset and to
date has been used.
NPDES Application Louisburg's Wastewater Treatment Plant Page-2 of 4
Peirson & Whitman Architects and Engineers, P.A. Project No. 1816 May 2004

For pH control, caustic soda could be used. A 2,000-gallon tank with
concrete containment exists for storage of the chemical.
A 10' x 12' prefabricated building houses the feed pumps.
8. Tertiary Filters:
Deep bed tertiary filters are used to remove BOD containing suspended
solids and to remove phosphorous and total nitrogen when necessary. If
and when alum is added to the sewage containing phosphate, a metal
phosphate would be formed. This metal phosphate would have poor
settling characteristics, but can be readily removed by filtration.
The filters have a total filter area of 300 SF and have a filtration rate of
3.47 gpm/SF. The filters are of the continuous cleaning/backwashing type
requiring only an air compressor and consist of three (3) separate cells.
Each cell is separated by a concrete wall that allows for one (1) cell to be
out of service and drained for maintenance or repair while the other
two (2) cells remain in service. With one (1) cell out of service, the
filtration rate would be 5.21 gpm/SF.
9. Disinfection:
The effluent leaving the plant is disinfected by way of a ultraviolet (UV)
system. The UV system consists of UV lamps being placed in a concrete
channel through which the plant effluent passes. The system is flow paced
to achieve energy efficiency and longer lamp life. A UV transmission of
65 percent was used for sizing the system. Grease in the wastewater will
be the major cause of frequent cleaning of the UV lamps; however, most
of the grease is removed upstream by the aerated grit and grease basin and
the tertiary filters.
10. Post Aeration:
The plant effluent must have a minimum dissolved oxygen concentration
of 5 mg/1 when it enters into the Tar River. Cascade aeration is used and
has no moving parts or operating cost.
11. Metering and Sampling:
The effluent from the wastewater plant is metered using a Parshall flume
having a throat width of 9 inches. With this throat, the flume will be able
to meter a flow as low as 40 gpm and as high as 5.75 MGD.
The effluent is sampled by using a refrigerated composite sampler located
at the head of the cascade aeration basin.
NPDES Application Louisburg's Wastewater Treatment Plant Page-3 of 4
Peirson & Whitman Architects and Engineers, P.A. Project No. 1816 May 2004

s
(411
12. Sludge Digester:
An aerobic sludge digester having a capacity of 656,000-gallons is used to
treat the wasted sludge from the treatment process. One (1)
25-horsepower submersible mixers in conjunction with three (3)
30.2-horsepower submersible aerators are used to treat the sludge.
13. Sludge Holding Tank:
The stabilized sludge that is produced in the digester is disposed of by
land application. The digested sludge is stored in a concrete tank having a
volume of 656,000-gallons. One (1) 30-horsepower floating mixers in
conjunction with three (3) 15-horsepower submersible aerators are used
periodically to keep the sludge mixed and aerobic. The sludge holding
tank and operate as the digester when maintenance is required of on the
digester.
14. Stand-by Generator:
A 310 kilowatt stand-by generator exists along with a 1,600 Amp
automatic transfer switch. The generator can run the influent pumps and
other selected pieces of equipment through out the plant.
NPDES Application Louisburg's Wastewater Treatment Plant Page-4 of 4
Peirson & Whitman Architects and Engineers, P.A. Project No. 1816 May 2004

INFLOW AND INFILTRATION ANALYSIS
TOWN OF LOUISBURG
MONTH
WATER SOLD
(gpd)
ESTIMATED
WATER TO
WASTEWATER
SYSTEM (9pd)
WASTEWATER
TREATED
(gpd)
ESTIMATED
INFLOW AND
INFILTRATION
(9Pd)
PERCENT111(%):
June, 2002
0.47
0.40
0.52
0.12
23
July
0.39
0.33
0.57
0.24
42
August
0.45
0.38
0.82
0.44
53
September
0.49
0.41
0.63
0.22
34
October
0.38
0.32
0.73
0.41
56
November
0.37
0.32
0.70
0.38
54
December
0.34
0.29
0.75
0.46
61
January 2003
0.34
0.29
0.64
0.35
55
February
0.43
0.36
0.72
0.36
50
March
0.304
0.258
0.997
0.739
74
April, 2003
0.348
0.296
0.996
0.700
70
Averages
0.36
0.30
0.67
0.37
48
NPDES Application Louisburg's Wastewater Treatment Plant
Page-1 of 1
& Whitman Architects and Engineers, P.A. Project No. 1816
May 2004

NPDES PERMIT
PROJECT:
PEIRSON & WHITMAN A&E
5510 MUNFORD ROAD
RALEIGH, NC 27612
PROJECT NO.: 1816
TOWN OF LOUISBURG ~
WWTP NPDES RENEWAL
ACTIVITY:
FLOW DATA
I
MARCH, 2001
APRIL
MAY
JUNE
JULY
AUGUST
SEPTEMBER
OCTOBER
NOVEMBER
DECEMBER
JANUARY, 2002
FEBRUARY
AVERAGE
MARCH
APRIL
MAY
JUNE
JULY
AUGUST
SEPTEMBER
OCTOBER
NOVEMBER
DECEMBER
JANUARY, 2003
FEBRUARY
AVERAGE
MARCH, 2003
APRIL
MAY
JUNE
JULY
AUGUST
SEPTEMBER
OCTOBER
NOVEMBER
DECEMBER
JANUARY, 2004
FEBRUARY
AVERAGE
AVERAGE
(mgd)
0.907
0.856
0.679
0.618
0.66
0.675
0.696
0.665
0.682
0.646
0.706
0.662
0.704
0.687
0.649
0.57
0.521
0.572
0.815
0.63
0.732
0.697
0.751
0.638
0.723
0.665
0.997
0.996
0.654
0.592
0.569
0.576
0.596
0.567
0.564
0.598
0.552
0.624
0.657
MAX
(mgd)
1.906
1.847
0.802
1.194
1.134
0.92
0.892
0.84
0.806
0.954
1.144
1.191
1.568
1.05
0.74
0.643
1.273
2.645
1.601
1.42
1.292
1.354
1.164
1.281
2.649
2.913
1.279
0.94
0.747
0.798
1.082
0.937
0.914
0.987
0.653
0.849
Feb-04
2/1/2004
2/2/2004
2/3/2004
2/4/2004
2/5/2004
2/6/2004
2/7/2004
2/8/2004
2/9/2004
2/10/2004
2/11/2004
2/12/2004
2/13/2004
2/14/2004
2/15/2004
2/16/2004
2/17/2004
2/18/2004
2/19/2004
2/20/2004
2/21/2004
2/22/2004
2/23/2004
2/24/2004
2/25/2004
2/26/2004
2/27/2004
2/28/2004
2/29/2004
0.526
0.591
0.751
0.625
0.624
0.849
0.799
0.526
0.594
0.638
0.604
0.688
0.604
0.593
0.667
0.597
0.66
0.629
0.647
0.637
0.581
0.56
0.662
0.596
0.513
0.591
0.642
0.582
0.513
AVG.
ww
0.624
WWTP Qs 2001-2004
WWTP FLOWS.xls
Page 1 of 1 3/11/2004

NPDES PERMIT
PROJECT:
TOWN OF LOUISBURG
WWTP NPDES RENEWAL
ACTIVITY: EFFLUENT DATA
PEIRSON & WHITMAN A&E
5510 MUNFORD ROAD
RALEIGH, NC 27612
PROJECT NO.: 1816
FEBRUARY, 2003
MARCH
APRIL
MAY
JUNE
JULY
AUGUST
SEPTEMBER
OCTOBER
NOVEMBER
DECEMBER
JANUARY, 2004
AVERAGE MAX
(mgd) (mgd)
Ph
Max
Ph
Min
Temp
Max
Temp
Min
Temp
Average
0.723 1.281 7.03 6.60 13 8 10.75
0.997 2.649 7.39 6.67 18 10 14
0.996 2.913 7.25 6.37 21 12 16.91
0.654 1.279 7.21 6.75 24 18 20.38
0.592 0.94 7.33 6.72 28.000 20 23.91
0.569 0.747 7.33 6.58 28 24 26.09
0.576 0.798 7.48 4.12 28 25 26.62
0.596 1.082 7.01 6.60 28 22 24.5
0.567 0.937 8.05 6.67 22 17 19.61
0.564 0.914 7.72 7.47 22 14 17.94
0.598 0.987 7.54 6.64 16 10 12.28
0.552 0.653 7.66 6.55 18 7 10.95
AVERAGE 0.665 7.417 6.478
TEMPERATURE (WINTER) Temp Temp Temp
Max Min Average
JANUARY, 2003 18 7 10.952
FEBRUARY, 2003 13 8 10.75
MARCH, 2003 18 10 14
AVERAGE 16.33 8.33 11.90
TEMPERATURE (SUMMER) Temp Temp Temp
Max Min Average
JULY, 2003 28 24 26.09
AUGUST 28 25 26.62
SEPTEMBER 28 22 24.5
AVERAGE 28.00 23.67 25.74
EFFLUENT DATA 2003
1816 " NTP DATA.xls
1 of 3
/11/2004

NPDES PERMIT
PROJECT:
TOWN OF LOUISBURG
WWTP NPDES RENEWAL
ACTIVITY: EFFLUENT DATA
PEIRSON & WHITMAN A&E
5510 MUNFORD ROAD
RALEIGH, NC 27612
PROJECT NO.: 1816
FEBRUARY, 2003
MARCH
APRIL
MAY
JUNE
JULY
AUGUST
SEPTEMBER
OCTOBER
NOVEMBER
DECEMBER
JANUARY, 2004
AVERAGE
CBOD5 CBOD5 TSR TSR FECAL FECAL
AVG MAX AVG MAX AVG MAX
3.27 5 8.0 14 2.4 60
4.16 5.7 8.1 21 11.9 300
2 2 1.9 3.1 1.3 34
2.7 10.5 1.7 2.3 1.3 4
2 2 2.3 5.1 2.2 10
2 2 1.6 2.4 2.4 21
2 2 1.8 2.8 6.1 41
2 2 1.4 2.4 2.3 55
2 2 1.5 2 2.4 130
2 2.6 1.5 3.3 1 1
2 2 3.5 19 1 1
2.3 6 1.9 3 1 1
2.4 2.9 2.9
EFFLUENT DATA 2003
1816 "VTP DATA.xls Pa(IP 2 of 3 (1/2004

NPDES PERMIT
PROJECT:
TOWN OF LOUISBURG
WWTP NPDES RENEWAL
ACTIVITY:
EFFLUENT DATA
PEIRSON & WHITMAN A&E
5510 MUNFORD ROAD
RALEIGH, NC 27612
PROJECT NO.: 1816
FEBRUARY, 2003
MARCH
APRIL
MAY
JUNE
JULY
AUGUST
SEPTEMBER
OCTOBER
NOVEMBER
DECEMBER
JANUARY, 2004
AVERAGE
Ammonia Ammonia
AVG MAX
0.515 0.81
0.362 0.62
0.2 0.23
0.23 0.34
0.27 0.53
0.19 0.23
0.18 0.25
0.18 0.22
0.19 0.28
0.18 0.2
0.21 0.32
0.26 0.61
0.2
DO DO TKN TKN O&G O&G P P
AVG MAX AVG MAX AVG MAX AVG MAX
6.78 7.6 2.64 2.93 5 5 0.26 0.31
7.2 8.3 2.4 3.1 5 5 0.31 0.39
7.51 8.6 1.9 2.3 6.6 6.9 0.14 0.17
7.3 8.2 1.45 1.51 5 5 0.28 0.65
7.1 7.5 1.4 1.5 5 5 0.14 0.25
6.8 7.5 1.5 1.6 5 5 0.22 0.32
7 8 1.4 1.4 5 5 0.51 0.88
7.1 8 1.5 1.5 5 5 0.44 0.72
8.1 9.5 1.8 2.2 5 5 0.13 0.18
8.9 9.5 1.4 1.4 7.6 7.6 0.14 0.15
9.8 10.5 1.5 1.6 6.7 6.7 0.11 0.15
10.2 12.8 1.1 1.3 7.1 7.1 0.09 0.12
7.8 1.7 5.7 0.23
EFFLUENT DATA 2003
1816 " NTP DATA.xls Pa . 3 of 3 (11/2004

r 8-2o-92 THU 1 r: 1 Z KRUGER H. CAROL I NA R. 02
Kruger
Louisburg, NC Design calculations
Design basis
Plow ADF 1.5 MGD
peak flow 3.0 MGD
BOD s 320 mg/I
TSS s 350 mg/I
NH4-N s 25 mg/1
TN s 40 mg/1
TP s 6 mg/1
Temperature min/max 10/15°C
Effluent requirements (effluent filter)
Tempz15°C Tempa10°C
BOD (mg/1) 11 22
TSS (mg/I) 30 30
NH4-N mg/I 3 6
TN me 4 8
TP mg/1 2 2
pH 6-9 6.9
Loadings ADF
BOD 4003 lbs/d
TSS 4379 lbs/d
TN 500 lbs/d
TP 75 lbs/d
Miscellaneous requirements
State rule 24 HRT at ADF
Volume oxidation ditches: 1.SMG
Design MLSSIMLVSS: 4000/3000 mg/1
F:M 4003/(1.5 x 4000 x 8.34) =- 0.08 g BOD/g SS x d
Sludge yield at F:M = 0.08, temp : 10°C : 0.75 g SS/g BOD,
Sludge production: 1.5 x 8.34 (320-10) x 75 = 2909 lbs SS/day
G\PROPS\LOVIS\CALcs1,DOC 1

D E B— 2 o— 9 2 T H U 1 Z: 1 4 K R U G E R N. CiA R O L I N A
Kruger
Sludge age - oxidation ditch 1.5 x 8.34 x 4000 = 17 days
2909
Nitrogen balance (temp z 10°C)
Nitrogen in WAS: 0.06 x 2909 = 175 lbs N/d (= 13.9 mg/I)
Ammonia in effluent 1.5 x 834 x 0.5 = 6 lbs N/d
NO= effluent: 1.5 x 834 x 4 = 50 lbs N/d
N to denitrify: Nam= - NwAs - NET
= 500-175-(6+50) = 269 lbs N/d
Rate of denitrification at 10°C: 1.5 x 104 lbs NO./lbs VSS x h
DN volume:
269 = 299,128 gal
1.5x 10ax3000x24x8x34
DN volume out of total volume:
�.S x 106 gal = 20.0%
0.299 x 106 gal
Oxic volume 1.5 x 106 x 299,128 = 1,200,872 gal
OxicSRT 17days x12_= 14 days
1.5
Necessary sludge age nitrification 10 ° C > 14 days
c rRoPsjI ouIs\CAl.Cswoc 2

'PE$--20-92 THU 1 3: 1 S KRUGER N. CAROL I NA
6
.r
P . 0 4
Kruger
Aerobic F:M 4003/(1.200 x 4000 x 8.34) = 0.1
Endogenous factor at F:Mo. = 0.08
Substrate factor 0.5
Oxygen calculation (AOR)
ADF Peak
hour
Endogenous respiration
0.08 x 1.200 x 8.34 x 4000 3261 136
Substrate respiration
0.55 x 1.5 x 8.34 (320-10) 1939 89
Nitrification
4.6 x 8.34 x 1.5 (40-13.9-0 5) 1473 61
Oxygen credit (denitrification)
2.86 x 8.34 x 1.5 x (40-13.9-0.5-4) + 773 - 32
Total 5900 254
* Peak hour loading calculated as (3/1.5) x FD x 1/24 where dilution factor FD at F:M —0.08 = 0.55
▪ =Aga (px10.07-1)1.01905.10)xa
faC SOR 11.27
With f = 0.95 and a = 0.9 thus yields
▪ =1.33
faC
thus if SOR/AOR = 1.33 then
SOR = = 1.33 x 5900 lbs Odd 7847 lbs 02/d
SOR = 1.33 x 254 lbs 02/h 3381bs 02/hour
Operating time —80%
Minimum installed capacity 338/0.8 = 422 lbs Oalhour
1 x 9M maxi brush aerator capacity at optimum lbs 02/kWh (8.4" subm.) 4.3 lbs 021h/ft
Therefore 9m Maxi 424/(9 x 3.28 x 4.3) = 3.3, 4 x 9m Maxi Rotors
MPRorsWoU1S CALc WOC 3

,FEB--20-92 THU 1 Zs : 1 5 ICRUGER H . CAROL I NA
41ks1
Kruger
Installed capacity 4 x 9 x 3.281 x 4.3 = 508 lbs 02/h/ft
At max submergence 4 x 9 x 3.881 x 5.6 an 661 lbs 02/h/ft
with 4 x pm Maxi Krtiger brush aerator
Phosphorous removal
Hydraulic retention time 1.5 h inci RAS at ADF
1.5x 1.5x 1.7x 1/24 = 159,400gal
with 70% recycle flow
Estimated P-content similar wastewater composition and temperature 4% P/DS
PwAS = 29091bs SS/d x 0.04 = 116 lbs/d
Thus PQm=ent «2 mg/l
Minimum allowable P content WAS to ensure Peff s 2 = 1.3%
Q\PROPsv.ouIs\cALCs1.Doc 4