NC0020231_Permit (Issuance)_20160201

NPDES DOCUMENT SCANNING. COVER SHEET
NPDES Permit:
NC0020231
Tar River WRF
Document Type:iermit
Issuanc
Wasteload Allocation
Authorization to Construct (AtC)
Permit Modification
Complete File - Historical
Engineering Alternatives (EAA)
Report
Instream Assessment (67b)
Speculative Limits
Environmental Assessment (EA)
Document Date:
February 1, 2016
This document is printed oa reuse paper - ignore any
content on the reYer$e side

DONALD R. VAN DER VAART
Secrekrry
D
S. JAY ZIMMERMAN
Direcior
Water Resources
ENVIRONMENTAL QUALITY
February 1, 2016
Mr. John Franklin, Town -Administrator
Town of Louisburg
110 West Nash Street
Louisburg, North Carolina 27549
PAT MCCRORY
Governor
Subject: NPDES Permit Issuance
Permit NC0020231
Tar River Water Reclamation Facility
Franklin County
Class 3 Facility
Dear Mr. Franklin:
Division personnel have reviewed and approved your application for renewal of the subject permit.
Accordingly, we are forwarding the attached NPDES permit. This permit is issued pursuant to the
requirements of North Carolina General Statute 143-215.1 and the Memorandum of Agreement
between North Carolina and the U.S. Environmental Protection Agency dated October 15, 2007 (or
as subsequently amended).
The final permit contains the following changes from your previous permit:
• The requirement to perform three pollutant scans was modified to allow the Town to
perform pollutant scans in 2016 and 2017 since there was a scan performed in late 2015 that
would qualify as one of the three scans required for the next permit application.
• The polymer system was removed from the wastewater treatment plant description in the
Supplement to Cover Sheet as it has been removed from site.
• Sampling for conductivity was removed from the effluent limits and monitoring
requirements. As there are no industrial contributions to the wastewater treatment
conductivity is not a parameter of concern for this facility.
• Sampling frequency for the effluent pollutant scan was modified to three times during the
permit cycle. See Special Condition A. (6). This condition was also modified to add narrative
for four seasonal second species toxicity tests.
• Individual limits for Total Nitrogen and Total Phosphorus were added to the permit
according to the Tar -Pamlico River Basin 2015 Permitting Strategy. Special Conditions A.
(3), A. (4), and A. (5) describe how to calculate nutrient loads and establish how compliance
will be determined. •
• A mercury evaluation was conducted in accordance with the Permitting Guidance developed
for the implementation of the statewide Mercury TMDL to determine the need for a limit
State of North Carolina I Environmental Quality I Water Resources
1617 Mail Service Center 1 Raleigh, North Carolina 27699-1611
919 807 6300

Mr. Franklin
February 1, 2016
and/or a Mercury Minimization Plan (MMP). A limit will not be required but you will be
required to develop a MMP. See Special Condition A. (8).
• A special condition was added to the permit to address the Environmental Protection
Agency's (EPA's) pending requirement for you to provide electronically -submitted
Discharge Monitoring Reports (eDMRs). The Division intends to fully implement the
eDMR program as soon as practicable. See Condition A.(7) in permit. For information on
eDMR, registering for eDMR and obtaining an eDMR user account, please visit the
following web page:
http: / /portal.ncdenr.org/web /wq/admin/bog/ipu/edmr.
For information on EPA's proposed NPDES Electronic Repotting Rule, please visit the
following web site:
http: //www2.epa.gov/compliance/proposed-npdes-electronic-reporting-rule.
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,
confonning 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
Resources or any other Federal, State, or Local governmental permits that may be required.
If you have any questions concerning this permit, please contact Teresa Rodriguez at telephone
number [phone] or at email [e-mail].
ere,, S. Jay Zimmerman, P.G.
Director, Division of Water Resources, NCDEQ
cc: NPDES Files
Central Files
Raleigh Regional Office / Surface Water Protection Section
EPA Region 4 (e-copy)
Ecosystems Branch, Carrie Ruhlman (e-copy)
Aquatic Toxicology Branch, Susan Meadows (e-copy)

NPDES Permit NC0020231
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENTAL QUALITY
DIVISION OF WATER RESOURCES
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 L II, III and IV hereof.
This permit shall become effective March 1, 2016.
This permit and authorization to discharge shall expire at midnight on September 30, 2019.
Signed this day February 1, 2016.
owe
. ay Zimmerman, P.G.
Director, Division of Water Resources
By Authority of the Environmental Management Commission
Page 1 of 12

NPDES Permit NC0020231
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 bar screen
• Aerated grit/grease removal
• Anaerobic selector
• Dual oxidation ditches (BioDeniopho Process)
• Dual secondary clarifiers
• Three cell tertiary filter
• Ultraviolet disinfection
• Cascade aeration
• 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.
Page 2 of 12

NPDES Permit NC0020231
PART I
A. (1) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS [15A NCAC 02B .0400
et seq., 02B .0500 et seq.]
During the period beginning on the effective date of the permit and lasting until expiration, the
Permittee is authorized to discharge treated wastewater from outfall 001. Such discharges shall be
limited and monitored by the Permittee as specified below:
Effluent Characteristics
Limits
Monitoring
MeasuXement
Frequency
Requirements.
-S` >r-..e TTTyp
. ample'
Sample
Location1
Monthly ,
Average
Weekly.:
Average
- Daily._
Maximum
Flow
1.37 MGD
Continuous
Recording
I or E
Total Monthly Flow (MG)
Monitor & Report
Monthly
Recorded or
Calculated
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 (Nov.
1-March31)
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/I
3/Week
Composite
E
NH3-N
(Nov.1 - March 31)
6.0 mg/L
18.0 mg/1
3/Week
Composite
E
Dissolved Oxygen
Daily Average not less than 5.0 mg/L
3/Week
Grab
E
Fecal Coliform
200/100 ml
400/100 ml
3/Week
Grab
E
pH
6.0 -
9.0 standard
units
3/Week
Grab
E
Temperature, °C
Daily
Grab
E
TKN (mg/L)
Monitor
& Report
Weekly
Composite
E
NO3-N + NO2-N (mg/L)
Monitor
& Report
Weekly
Composite •
E
TN (mg/L) 3
Monitor
& Report
Weekly
Composite
E
TN Load4
Monitor
& Report (lb/mo)
(effective
1/1/2016)5
Monthly
Calculated
_
E
Annually
Calculated
E
TP (mg/I)
Monitor
& Report
Weekly
Composite
E
TP Loads
Monitor
3,531 lb/yr
& Report (lb/mo)
(effective 1/1/2016)5
Monthly
Calculated
E
Annually
Calculated
E
Chronic Toxicity6
Quarterly
Composite
E
Temperature, °C
Variable
Grab
U, D
Dissolved Oxygen (mg/1)
Variable
Grab
U,.D
Effluent Pollutant Scan
Monitor and Report
Footnote 8
Footnote 8
E
rootnotes:
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. For a given wastewater sample, 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. TP is Total
Phosphorus.
4. TN or TP Load is the mass quantity of Total Nitrogen or Total Phosphorus discharged in a given period of
time. See Special Condition A.(3) Calculation of TN or TP Loads.
5. Compliance with mass limits shall be determined in accordance with Special Condition A.(4) Annual Limits
for Total Nitrogen or Total Phosphorus.
Page 3 of 12

NPDES Permit NC0020231 '
6. Chronic Toxicity (Ceriodaphnia) at 13%: March, June, September, and December. See Special Condition A (2)
Chronic Toxicity Permit Limit.
7. Samples collected three times per week during June 1 through September 30 and once per week October 1
through May 31. Instream monitoring requirements are waived as long as the Permittee maintains
membership in the Tar -Pamlico Basin Association. If Permittee ceases membership, then all instream
monitoring requirements specified in this permit are immediately reinstated.
8. See Special Condition A. (6) Pollutant Analysis.
There shall be no discharge of floating solids or visible foam in other than trace amounts.
A. (2) CHRONIC TOXICITY PERMIT LIMIT (QUARTERLY) [15A NCAC 02B .0200 et seq.] •
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 December 2010, or
subsequent versions or "North Carolina Phase II Chronic Whole Effluent Toxicity Test Procedure"
(Revised- December 2010) or subsequent versions. The tests will be performed during the months of
March, June, September, and December. These months signify the first month of each three-month
toxicity testing quarter assigned to the facility. Effluent sampling for this testing must be obtained
during representative effluent discharge and 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 -December 2010) 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, DWR Form AT-3
(original) is to be sent to the following address:
Attention: North Carolina Division of Water Resources
Water Sciences Section/Aquatic Toxicology Branch
1623 Mail Service Center
Raleigh, North Carolina 27699-1623
Completed Aquatic Toxicity Test Forms shall be filed with the Water 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
Page 4 of 12

NPDES Permit NC0020231
(b.)
report with the notation of "No Flow" in the comment area of the form. The report shall be submitted to
the Water 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. Assessment of toxicity compliance is based on
the toxicity testing quarter, which is the three month time interval that begins on the first day of the
month in which toxicity testing is required by this permit and continues until the final day of the third
month.
Should any test data from this monitoring requirement or tests performed by the North Carolina
Division of Water Resources 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.
A. (3) CALCULATION OF TOTAL NITROGEN AND TOTAL PHOSPHORUS LOADS [G.S. 143-
215.1 (b)]
(a.) The Permittee shall calculate monthly and annual TN Loads as follows:
(i.)
(b.)
Monthly TN (or TP) Load (lb/mo) = TN (or TP) x TMF x 8.34
where:
TN or TP = the average Total Nitrogen or Total Phosphorus concentration
(mg/L) of the composite samples collected during the
month
TMF = the Total Monthly Flow of wastewater discharged during the
month (MG/mo)
8.34 = conversion factor, from (mg/L x MG) to pounds
(ii.) Annual TN (or TP) Load (lb/yr) = Sum of the 12 Monthly TN (or TP) Loads for the
calendar year
The Permittee shall report monthly Total Nitrogen and Total Phosphorus results (mg/L and
lb/mo) in the appropriate discharge monitoring report for each month and shall report each
calendar year's results (lb/yr) with the December report for that year.
A. (4) ANNUAL LIMITS FOR TOTAL NITROGEN OR TOTAL PHOSPHORUS [G.S. 143-
215.1(b)1
(a.) Total Nitrogen (TN) and Total Phosphorus (TP) allocations and load limits for NPDES dischargers
in the Tar -Pamlico River basin are annual limits and apply on a calendar year basis.
For any given calendar year, the Permittee shall be in compliance with the annual TN (or TP) Load
limit in this Permit if:
(i.) the Permittee's annual TN (or TP) Load is less than or equal to the effective limit, or
(ii.) the Permittee is a Co-Permittee Member of a compliance association.
Page 5 of 12

NPDES Permit NC0020231
(c.) If the Permittee is not a co-permittee member of a compliance association and the Permittee's
cumulative annual TN (or TP) discharge exceeds the effective TN (or TP) Load limit in this permit
at any point during the calendar year, the Permittee is in violation of its TN (or TP) Load limit for
the remainder of the calendar year, and each day of continuing violation shall constitute a separate
violation. Compliance with annual limits shall be determined separately for each calendar year,
and an exceedance in one year does not carry forward to subsequent years.
(d.) The TN (or TP) Load limit in this Permit (if any) may be modified as the result of allowable
changes in the Permittee's allocations.
(I.)
Allowable changes include those resulting from purchase of TN (or TP) allocation from an
authorized mitigation banker, the Ecosystem Enhancement Program, or other source allowed
under applicable regulations; purchase, sale, trade, or lease of allocation between the
Permittee and other dischargers; and other transactions approved by the Division and
consistent with the Tar -Pamlico River Basin Association Agreement, as revised.
The Permittee may request a modification of the TN (or TP) Load limit in this Permit to
reflect allowable changes in its allocation(s). Upon receipt of timely and proper application,
the Division will modify the permit as appropriate and in accordance with state and federal
program requirements.
(iii.) Changes in TN (or TP) limits become effective on January 1 of the year following permit
modification. The Division must receive application no later than August 31 for changes
proposed for the following calendar year.
(iv.) Application shall be sent to:
NCDWR / Wastewater Permits Branch
Attn: Tar -Pamlico River Basin Coordinator
1617 Mail Service Center
Raleigh, NC 27699-1617
(e.) If the Permittee is a member and co-permittee of an approved compliance association on January 1
of a given year, its TN and TP discharges during that year are governed by that association's group
NPDES permit and the limits therein.
(i.)
(f.)
The Permittee shall be considered a Co-Permittee Member for any given calendar year in
which it is identified as such in Appendix A of the association's group NPDES permit.
Association roster(s) and members' TN and TP allocations will be updated annually and in
accordance with state and federal program requirements.
(iii.) If the Permittee intends to join or leave a compliance association, the Division must be
notified of the proposed action in accordance with the procedures defined in the association's
NPDES permit.
(A) Upon receipt of timely and proper notification, the Division will modify the permit as
appropriate and in accordance with state and federal program requirements.
(B) Membership changes in a compliance association become effective on January 1 of the
year following modification of the association's permit.
The TN and TP monitoring and reporting requirements in this Permit remain in effect throughout
the term of the Permit and are not affected by the Permittee's membership in a compliance
association.
Page 6 of 12

NPDES Permit NC0020231
(b.)
A. (5) NUTRIENT ALLOCATIONS [G.S. 143-215.1(b)]
(a.) Total Nitrogen (TN) and Total Phosphorus (TP) allocations represent the maximum TN and TP
loads that a discharger or group of dischargers is potentially allowed under the Tar -Pamlico
nutrient management strategy. Allocations are not enforceable limits but are the basis for TN and
TP limits established in individual or group NPDES permits.
The allocations originally assigned to the Tar -Pamlico Basin Association members total 889,274
lb/yr (404,274 kg/yr) TN and 160,372 lb/yr (73,060 kg/yr) TP. These group allocations have been
divided among the members in proportion to the maximum permitted flow in each member's
permit; that is,
Individual Allocation (TP or TN) —
Individual Permitted Flow (MGD)
Total Permitted Flow, TPBA (MGD)
x Group Allocation, TPBA (TN or TP)
For the purposes of this distribution, individual permitted flows for the Association members are
those in effect as of July 2014 and result in a Total Permitted Flow of 62.495 MGD.
(c.) The following table lists, for information purposes only, the TN and TP allocations assigned to,
acquired by, or transferred to the Permittee in accordance with the Tar -Pamlico River Basin Phase
IV Agreement. Applicable TN or TP limits are established in the Effluent Limitations conditions of
this permit or in the NPDES permit of a compliance association of which the Permittee is a Co-
Permittee Member.
ALLOCATION TYPE .
SOURCE
DATE
ALLOCATION AMOUNT (+)
•
STATUS
.`Ib/yr)
(kglyr)
Total Nitrogen
Tar -Pamlico River
Basin Phase IV
Agreement
7/9/2015
19,538
8,862
Active
Total Phosphorus
Tar -Pamlico River
Basin Phase IV
Agreement
7/9/2015
3,531
1,601
Active
1. Any addition, deletion, or modification of the listed allocation(s) (other than to correct
typographical errors) or any change from Reserve to Active status of any of the listed allocations
shall be considered a major modification of this permit and shall be subject to the public review
process afforded such modifications under state and federal rules.
Page 7 of 12

NPDES Permit NC0020231
A. (6) EFFLUENT POLLUTANT SCAN [G.S.143-215.1(b)]
The Permittee shall perform a total of three (3) Effluent Pollutant Scans for all parameters listed below.
One scan must be performed in each of the following years: 2016 and 2017. 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 should be collected with
one quarterly toxicity test each year, and must represent seasonal variation [i.e., do not sample in the same
quarter every year]. Unless otherwise indicated, metals shall be analyzed as "total recoverable."
Ammonia (as N)
Chlorine (total residual, TRC)
Dissolved oxygen
Nitrate/Nitrite
Kjeldahl nitrogen
Oil and grease
Phosphorus
Total dissolved solids
Hardness
Antimony
Arsenic
Beryllium
Cadmium
Chromium
Copper
Lead
Mercury (EPA Method 1631E)
Nickel
Selenium
Silver
Thallium
Zinc
Cyanide
Total phenolic compounds
Volatile organic compounds:
Acrolein
Acrylonitrile
Benzene
Bromoform
Carbon tetrachloride
Chlorobenzene
Chlorodibromomethane
Chloroethane
2-chloroethylvinyl ether
Chloroform
Dichlorobromomethane
1,1-dichloroethane
1,2-dichloroethane
Trans-1,2-dichloroethylene
1,1-dichloroethylene
1,2-dichloropropane
1,3-dichloropropylene
Ethylbenzene
Methyl bromide
Methyl chloride
Methylene chloride
1,1,2,2-tetrachloroethane
Tetrachloroethylene
Toluene
1,1,1-trichloroethane
1,1,2-trichloroethane
Trichloroethylene
Vinyl chloride
Acid -extractable compounds:
P-chloro-m-cresol
2-chlorophenol
2,4-dichlorophenol
2,4-dimethylphenol
4,6-dinitro-o-cresol
2,4-dinitrophenol
2-nitrophenol
4-nitrophenol
Pentachlorophenol
Phenol
2,4,6-trichlorophenol
Base -neutral compounds:
Acenaphthene
Acenaphthylene
Anthracene
Benzidine
Benzo(a)anthracene
Benzo(a)pyrene
3,4 benzofluoranthene
Benzo(ghi)perylene
Benzo(k)fluoranthene
Bis (2-chloroethoxy) methane
Bis (2-chloroethyl) ether
Bis (2-chloroisopropyl) ether
Bis (2-ethylhexyl) phthalate
4-bromophenyl phenyl ether
Butyl benzyl phthalate
2-chloronaphthalene
4-chlorophenyl phenyl ether
Chrysene
Di-n-butyl phthalate
Di-n-octyl phthalate
Dibenzo(a,h)anthracene
1,2-dichlorobenzene
1,3-dichlorobenzene
1,4-dichlorobenzene
3,3-dichlorobenzidine
Diethyl phthalate
Dimethyl phthalate
2,4-dinitrotoluene
2,6-dinitrotoluene
1,2-diphenylhydrazine
Fluoranthene
Fluorene
Hexachlorobenzene
Hexachlorobutadiene
Hexachlorocyclo-pentadiene
Hexachloroethane
Indeno (1,2,3-cd) pyrene
Isophorone
Naphthalene
Nitrobenzene
N-nitrosodi-n-propylamine
N-nitrosodimethylamine
N-nitrosodiphenylaxnine
Phenanthrene
Pyrene
1,2,4-trichlorobenzene
Page 8 of 12

NPDES Permit NC0020231
Reporting. Test results shall be reported on DWQ Form A MR-PPA1 (or in a form approved by the
Director) by December 31st of each designated sampling year. The report shall be submitted to the
following address: NC DENR/ DWR/ Central Files, 1617 Mail Service Center, Raleigh, North
Carolina 27699-1617.
Additional Toxicity Testing Requirements for Municipal Permit Renewal. Please note that Municipal
facilities that are subject to the Effluent Pollutant Scan requirements listed above are also subject to
additional toxicity testing requirements specified in Federal Regulation 40 CFR 122.210)(5). The US EPA
requires four (4) toxicity tests for a test organism other than the test species currently required in this
permit. The multiple species tests should be conducted either quarterly for a 12-month period prior to
submittal of the permit renewal application, or four tests performed at least annually in the four and one
half year period prior to the application: These tests shall be performed for acute or chronic toxicity,
whichever is specified in this permit. The multiple species toxicity test results shall be filed with the
Aquatic Toxicology Branch at the following address:
North Carolina Division of Water Resources
Water Sciences Section/Aquatic Toxicology Branch
1623 Mail Service Center
Raleigh, North Carolina 27699-1623
Contact the Division's Aquatic Toxicology Branch at 919-743-8401 for guidance on conducting the
additional toxicity tests and reporting requirements. Results should also be summarized in Part E
(Toxicity Testing Data) of EPA Municipal Application Form 2A, when submitting the permit renewal
application to the NPDES Permitting Unit.
A. (7) ELECTRONIC REPORTING OF DISCHARGE MONITORING REPORTS [G.S. 143-215.1(b)]
Proposed federal regulations require electronic submittal of all discharge monitoring reports (DMRs)
and specify that, if a state does not establish a system to receive such submittals, then permittees must
submit DMRs electronically to the Environmental Protection Agency (EPA). The Division anticipates
that these regulations will be adopted and is beginning implementation in late 2013.
NOTE: This special condition supplements or supersedes the following sections within Part II of this
permit (Standard Conditions for NPDES Permits):
• Section B. (11.)
• Section D. (2.)
• Section D. (6.)
• Section E. (5.)
Signatory Requirements
Reporting
Records Retention
Monitoring Reports
1. Reporting [Supersedes Section D. (2.) and Section E. (5.) (a)1
Beginning no later than 270 days from the effective date of this permit, the permittee shall begin
reporting discharge monitoring data electronically using the NC DWR's Electronic Discharge
Monitoring Report (eDMR) internet application.
Monitoring results obtained during the previous month(s) shall be summarized for each month and
submitted electronically using eDMR. The eDMR system allows permitted facilities to enter
monitoring data and submit DMRs electronically using the internet. Until such time that the state's
eDMR application is compliant with EPA's Cross -Media Electronic Reporting Regulation
Page 9 of 12

NPDES Permit NC0020231
(CROMERR), permittees will be required to submit all discharge monitoring data to the state
electronically using eDMR and will be required to complete the eDMR submission by printing,
signing, and submitting one signed original and a copy of the computer printed eDMR to the
following address:
NC DENR / DWR / Information Processing Unit
ATTENTION: Central Files / eDMR
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
If a permittee is unable to use the eDMR system due to a demonstrated hardship or due to the
facility being physically located in an area where less than.10 percent of the households have
broadband access, then a temporary waiver from the NPDES electronic reporting requirements may
be granted and discharge monitoring data may be submitted on paper DMR forms (MR 1,1.1, 2, 3)
or alternative forms approved by the Director. Duplicate signed copies shall be submitted to the
mailing address above.
Requests for temporary waivers from the NPDES electronic reporting requirements must be
submitted in writing to the Division for written approval at least sixty (60) days prior to the date the
facility would be required under this permit to begin using eDMR. Temporary waivers shall be
valid for twelve (12) months and shall thereupon expire. At such time, DMRs shall be submitted
electronically to the Division unless the permittee re -applies for and is granted a new temporary
waiver by the Division.
Information on eDMR and application for a temporary waiver from the NPDES electronic reporting
requirements is found on the following web page:
http:/ /portal.ncdenr.org/web/wq/admin/bog/ipu/edmr
Regardless of the submission method, the first DMR is due on the last day of the month following
the issuance of the permit or in the case of a new facility, on the last day of the month following the
commencement of discharge.
2. Signatory Requirements [Supplements Section B. (11.) (b) and supersedes Section B. (11.) (d)1
All eDMRs submitted to the permit issuing authority shall be signed by a person described in Part II,
Section B. (11.)(a) or by a duly authorized representative of that person as described in Part II,
Section B. (11.)(b). A person, and not a position, must be delegated signatory authority for eDMR
reporting purposes.
For eDMR submissions, the person signing and submitting the DMR must obtain an eDMR user
account and login credentials to access the eDMR system. For more information on North Carolina's
eDMR system, registering for eDMR and obtaining an eDMR user account, please visit the following
web page:
http: / / portal.ncdenr.org/web/ wq/ admin/bog/ ipu/ edmr
Certification. Any person submitting an electronic DMR using the state's eDMR system shall make
the following certification [40 CFR 122.22]. NO OTHER STATEMENTS OF CERTIFICATION WILL
BE ACCEPTED:
Page 10 of 12

NPDES Permit NC0020231
"I certijii, under penalty of law, that this document and all attachments were prepared under my direction or
supervision in accordance with a system designed to assure that qualified personnel properly gather and
evaluate the information submitted. Based on my inquiry of the person or persons who manage the system, or
those persons directly responsible for gathering the information, the information submitted is, to the best of my
knowledge and belief true, accurate, and complete. I am aware that there are significant penalties for
submitting false information, including the possibility of fines and imprisonment for knowing violations."
3. Records Retention [Supplements Section D. (6.)1
The permittee shall retain records of all Discharge Monitoring Reports, including eDMR
submissions. These records or copies shall be maintained for a period of at least 3 years from the
date of the report. This period may be extended by request of the Director at any time [40 CFR
122.41].
A. (8) MERCURY MINIMIZATION PLAN
The permittee shall develop and implement a mercury minimization plan during this permit term. The
MMP shall be developed within 180 days of the NPDES Permit Effective Date, and shall be available for
inspection on -site. A sample MMP was developed through a stakeholder review process and has been
placed on the Division website for guidance (http://portal.ncdenr.org/web/wq/swp/ps/npdes, under
Model Mercury Minimization Plan). The MMP should place emphasis on identification of mercury
contributors and goals for reduction. Results shall be summarized and submitted with the next permit
renewal.
Performance of the Mercury Minimization Plan will meet the requirements of the TMDL (Total
Maximum Daily Load) for mercury approved by USEPA on October 12, 2012, unless and until a
Waste Load Allocation specific to this facility is developed and this NPDES permit is amended to
require further actions to address the Waste Load Allocation.
Page 11 of 12

1NrIJnD 1-erIlut INLUULUL31
Latitude: 36°05'12"
Longitude: 78°17'32"
Quad #: C25SE
Receiving Stream: Tar River
Outfall 001
Town of Louisburg - Tar River Water Reclamation Facility
Franklin County
Sub -Basin: 03-03-01
8-Digit HUC: 03020101
Permitted Flow: 1.37 MGD
Stream Class: WS-V NSW
N
Facility Location (not to scale)
raddiggt
NPDES Permit No. NC0020231
Page 12 of 12

AFFIDAVIT OF PUBLICATION
PN sfzft'5
STATE OF NORTH CAROLINA
COUNTY OF WAKE
Ad Number
0001900534
Advertiser Name: DEPARTMENT OF WATER RESOURCES
Address: attn Wren Thedford
1617 MAIL SERVICE CENTER PROTECTION SECTION/ POINT
RALEIGH, NC 276991617
Before the undersigned, a Notary Public of Wake
County North Carolina, duly commissioned and
authorized to administer oaths, affirmations, etc.,
personally appeared R. C. Brooks, who being duly
sworn or affirmed, according to law, doth depose
and say that he or she is Accounts Receivable
Specialist of The News & Observer Publishing
Company a corporation organized and doing
business under the Laws of the State of North
Carolina, and publishing a newspaper known as
The News & Observer, in the City of Raleigh, Wake
County and State aforesaid, the said newspaper in
which such notice, paper, document, or legal
advertisement was published was, at the time of
each and every such publication, a newspaper
meeting all of the requirements and qualifications
of Section 1-597 of the General Statutes of North
Carolina and was a qualified newspaper within the
meaning of Section 1-597 of the General Statutes
of North Carolina, and that as such he or she
makes this affidavit; and is familiar with the books,
files and business of said corporation and by
reference to the files of said publication the
attached advertisement for DEPARTMENT OF
WATER RESOURCES was inserted in the
aforesaid newspaper on dates as follows:
08/13/2015
R. C. Brooks, Accounts Receivable Specialist
Wake County, North Carolina
PublicNotice,_
eitenDEUnaceolinaEvaranPS
71a SeNriceCter •i
Wastewater Permit
The North Caroling Environnnental
iMscneasemD .Eomiso}rcerte
ppeermlt
to the person(s)• listed -beloopW.
Written
raper twills b�cepted tun�}il, pro-
posed after the publish ofthis•totlge..
The �irecto of the NC{F3�vlst Water
Rosduirces• -r(DWR) - rr�t ty hof a nftblfe
hearftg should there, be a.sfgniflciant• de-
$r8e'af�ptlblIc.1nitterest.► .lease all ciom
me�tts,,,anVor f_ a la ; : uos s, .tag
pDWR gat''th& above dress ifterestdd'
IsbuY S xt, 'Raleigh,NNNC o� revi tt fl= l
formatlon,.on file. Additional info
tion on IIPDES permits aqn�d .this notice.,
may be fau 'o our w lte-
nttpp•//ppoorrt�ainchdenr.o ebFwgfsw
es/carendar,on bV calling (919)..807-
The Town of Louisburg
,has:a lied -for
fwalWwliND a�imCoutyT
permitted: facility discharges treated
w _ r id the. Tar River. in the. Tar-
Pat-Mico Riker Basin. This dMscharS.e&
mat+ caredMute allocations in this por-
tion of theTar River.
Sworn to and subscribed before me
This 13th day of August, 2015
My Commission Expir
Notary Signature

AT&
bENR
North Carolina Department of Environment and Natural Resources
Division of Water Resources
Pat McCrory
Govemor
MEMORANDUM
To:
From:
August 12, 2015
Allen Hardy
NC DENR / DWR / Regional Engineer
Raleigh Regional Office
Teresa Rodriguez
919-807-6387
NPDES Unit
Subject: Review of Draft NPDES Permit NC0020231
Louisburg WWTP
Franklin County
Donald R. van der Vaart
Secretary
Please indicate below your agency's position or viewpoint on the draft permit and return this form by September 12,
2015. If you have any questions on the draft permit, please feel free to contact me at the telephone number shown
above.
RESPONSE: (Check one)
Signed
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:
W MLA,
Date:
1601 Mail Service Center, Raleigh, North Carolina 27699-1601
Phone: [phone] Internet: www.ncdenr.gov
An Equal opportunity l Affirmative Action Employer —Made In part by recycled paper

ievneo T fo 2O1S
DENR/DWR
FACT SHEET FOR NPDES PERMIT DEVELOPMENT
NPDES No. NC0020231
Facility Information
Applicant/Facility Name:
Town of Louisburg/Tar River Water Reclamation Facility
Applicant Address:
110 West Nash Street, Louisburg, NC 27549
Facility Address:
NC Hwy 56 East, Louisburg, NC 27549
Permitted Flow
1.37 MGD
Type of Waste:
Domestic
Facility/Permit Status:
Class IV/Renewal
County:
Franklin
Miscellaneous
Receiving Stream:
Tar River
303(d) Listed?:
No
Stream Classification:
WS-V NSW
Subbasin:
03-03-01
Drainage Area (mi2):
437
USGS Topo Quad:
C25SE
Summer 7Q10 (cfs)
14
Regional Office:
Raleigh
Winter 7Q10 (cfs):
30.5
Permit Writer:
Teresa Rodriguez
Average Flow (cfs):
460
Date:
8/7/2015
IWC (%):
13
Summary:
The Town of Louisburg operates the Tar River Water Reclamation Facility (WRF) with a current
permitted flow of 1.37 MGD. The permit was issued on February 17, 2010 and expired on
September 30, 2014. Louisburg submitted an application for renewal on April 1, 2014. Louisburg
does not have pretreatment program.
The Louisburg WRF consist of influent pumps, bar screen, grit removal, Dual oxidation ditches
(BioDeniopho Process), return and waste sludge pumps, two clarifiers, two tertiary filters, UV
disinfection system, cascade aeration, sludge digester and sludge holding tank.
Receiving Stream:
This facility discharges to the Tar River in the Tar -Pamlico River Basin, classified WS-W, NSW
waters, HUC 03020101. This section of the Tar River is not listed as impaired in the NC 2014
303(d) list.
DMR Data Review:
Compliance
There were no violations of permit limits or conditions during this permit cycle.
DMR data were reviewed for the period of May 2010 to May 2015. Data are summarized in Table 1.

Fact Sheet
NC002023 1
Table 1. Data Summa
Parameter
. Units
Average
Max
Min
Flow
MGD
0.601
2.188
0.115
BOD summer
mg/1
2.1
8.3
< 2
BOD winter
mg/1
2.1
7.9
< 2
NH3N summer
mg/1
0.19
3.48
0.02
NH3N winter
mg/1
0.25
4.1
0.03
TSS
mg/1
5.7
18.8
< 5
SU
7.0
7.8
6.3
_pH
Temperature
°C
19
30
8
DO
mg/1
8.4
11.4
5.2
Conductivity
umhos/cm
390
567
175
TN
mg/1
2.45
8.76
0.84
TP
mg/1
0.24
7.31
0.03
Fecal Coliform
#/100 ml
17.4
400
< 1
Mercury Evaluation
A mercury evaluation was conducted in accordance with the Permitting Guidance developed for the
implementation of the statewide Mercury TMDL to determine the need for a limit and/or Mercury
Minimization Plan (MMP). Based on dilution the water quality based effluent limitation (WQBEL)
for mercury is 91 ng/1. The technology based effluent limit (TBEL) is 47 ng/1. Only three samples
were collected during the past five years for the Priority Pollutant Analysis (PPA). None of the
samples exceeded the WQBEL or the TBEL. The facility had detections above 1 ng/1 over the past
five years, therefore a Mercury Minimization Plan will be required in the permit. A condition will be
added to the permit describing the requirements for the MMP. No limit will be required; mercury
data will be collected as per PPA requirement in the permit. gim e Ii
4��t % jC
Reasonable Potential Analysis 1
The existing permit does not require metal monitoring therefore there is no data to perform
reasonable potential analysis.
Instream Monitoring:
The permit requires instream monitoring at one upstream location and two downstream locations.
The permittee is a member of the Tar -Pamlico River Basin Association therefore instream
monitoring is waived. The Tar -Pamlico Association monitors two stations in this section of the Tar
River, one upstream and one downstream. The upstream station is located on the Tar River at
US401. The data for the upstream station shows one sample for DO and one sample for pH lower
than the water quality standards. The downstream station is located in the Tar River at Ferrels
Bridge Road near Bunn. This station is below Cedar Creek and the discharge from Franklin County.
Data for the downstream station shows 8 out of 116 DO samples less than 5 mg/1 (average 7.5
mg/1, minimum value 4 mg/1), 5 samples out of 116 pH less than 6 S.U. (average 6.9 S.U., minimum
value 5.2 S.U.) and 3 out of 81 turbidity samples higher than 25 NTU (average 20 NTU, maximum
100 NTU). These values represent less than 10% samples below the standards.
Priority Pollutant Analysis:
The application includes the results of three priority pollutant analyses. No priority pollutants were
detected. /� I J} < Wjej"?
l /Mi
Page 2 of 5

Fact Sheet
NC0020231
Aquatic Toxicity Testing:
Permit requires chronic toxicity, ceriodapbnia dubia, 13%. The facility consistently passed all the
toxicity tests. Doi all z"ify, /rid af»o ?zo xo
Nutrient Controls:
History of Nutrient Management Strategy for Point Sources
On September 12, 1989, the Environmental Managements Commission classified the Tar -Pamlico
River Basin as Nutrient Sensitive Waters (NSW). On February 13, 1992, the Commission approved
a revised NSW Implementation Strategy that established the framework for a nutrient reduction
trading program between point and nonpoint sources of pollution. The Strategy also established
certain conditions to be met by an association of dischargers known as the Tar -Pamlico Basin
Association (the Association). Those conditions are defined in the Tar -Pamlico Nutrient Sensitive
Waters Implementation Strategy (the "Agreement"). Information on the evolution of the program
and past and present versions of the Agreement are available at
http:/ /portal.ncdenr.org/web /wq/ps /nps /tarpampointsource.
Addition of Nutrient Limits
In 2009, the U.S. EPA Region 4 offices raised concerns that, although the Agreement set collective
nutrient caps for the members of the Tar -Pamlico Basin Association, the members' NPDES permits
lacked nutrient limits and, as a result, EPA had no means to enforce nutrient controls should it
become necessary. As part of the 2009 permit renewals, the Division added the group caps for
nitrogen and phosphorus, along with related special conditions, to the permits of the fifteen TPBA
member facilities. The Division could not add individual N and P limits at that time, because no
basis existed at the time for dividing the available wasteload allocations among the members.
Instead, the Division agreed to work with the Association to determine an appropriate distribution
and to then add individual N and P limits to the permits as part of the 2014 renewals.
With the consent of the Association, the group caps are distributed among the members in
proportion to their 2014 maximum permitted flows, as follows:
Table 2. TPBA Members and Nutrient Allocations/ Limits
Permit
Owner
Facility
TN Load
(lb/yt)
TP Load
(lb/yr)
NC0030317
City of Rocky Mount
Tar River Regional WWTP
299,491
54,124
NC0023931
Greenville Utilities Commission
GUC WWTP
249,576
45,103
NC0020605
Town of Tarboro
Tarboro WWTP
71,307
12,887
NC0025054
City of Oxford
Oxford WWTP
49,915
9,021
NC0020648
City of Washington
Washington WWTP
52,054
9,407
NC0069311
Franklin County
Franklin County WWTP
42,784
7,732
NC0020834
Town of Warrenton
Warrenton WWTP
28,523
5,155
NC0026042
Town of Robersonville
Robersonville WWTP
25,671
4,639
NC0020231
Town of Louisburg
Louisburg WRF
19,538
3,531
NC0026492
Town of Belhaven
Belhaven WWTP
14,261
2,577
NC0025402
Town of Enfield
Enfield WWTP
14,261
2,577
NC0023337
Town of Scotland Neck
Scotland Neck WWTP
9,626
1,740
NC0020061
Town of Spring Hope
Spring Hope WWTP
5,705
1,031
NC0042269
Town of Bunn
Bunn WWTP
4,278
773
NC0020435
Town of Pinetops
Pinetops WWTP
4,278
773
Page3of5

Fact Sheet
NC0020231
Given the size and characteristics of the river basin, transport losses were judged to be somewhat
uniform across the basin and were not considered in these calculations. Thus, nutrient limits equal
the nutrient allocations for each facility, unlike in other nutrient management strategies in the state.
The draft permit includes new conditions designed to meet the Division's 2009 commitment. The
group caps and related conditions have been deleted and replaced with individual N and P limits and
a new set of related special conditions.
The nutrient limits are annual mass limits and become effective January 1, 2016. Each members'
limits are equivalent to approximately 4.7 mg/L TN and 0.85 mg/L TP for the member's full
permitted flow.
The special conditions document the N and P allocations assigned to the facility and provide for
consistent calculation of nutrient loads by all members. They also establish how compliance with the
N and P limits will be determined if the Association members apply for and obtain a group NPDES
permit to control their nutrient discharges collectively. The members have indicated they plan to
apply for such a permit, and the Division initiated discussions with the members on that approach in
2012.
LIMITS AND MONITORING REQUIREMENTS:
Current conditions, as well as the basis for the limits are summarized in Table 3.
Table 3. Current Conditions and Proposed Changes
Parameters
Affected.
Pert Condition
Channge from
Previous. Permit
..:
Basis for Condition/Cha � e•
Flow
. _ �_..
MA 1.37 MGD
No changes
. _= .
T15A 2B .0505
CBOD5
Summer:
MA 8 mg/1
WA 12 mg/1
Winter:
MA 16 mg/1
WA 24 mg/1
No changes
Based on protection of DO standard
NH3-N
Summer:
MA 3 mg/1
WA 9 mg/1
Winter:
MA 6 mg/1
WA 18 mg/1
No changes
Based protection of DO standard
TSS
WA 45 mg/1
MA 30 mg/1
No changes
Secondary treatment standards/40
CFR 133 / T15A 2B .0406
Fecal coliform
WA 400 /100m1
MA 200 %100m1
No changes
State WQ standards, T15A 2B .0200
DO
> 5 mg/1
No changes
State WQ standards, T15A 2B .0200
pH
6 — 9 SU
No changes
State WQ standards, T15A 2B .0200
Total Nitrogen
Total Phosphorus
19,538 lb/yr
3,531 lb/yr
New limits
2015 permitting strategy (See Nutrient
Controls section above)
Conductivity
Monitor
3/week
Eliminate monitoring
The town doesn't have any industrial
dischargers, not required to sample
for conductivity.
Priority Pollutant
Analysis
Annual
Three times during
permit cycle
40 CFR 122
1. MGD — Million gallons per day
MA - Monthly Average
WA — Weekly Average
DM — Daily Max
Page 4 of 5

Fact Sheet
NC0020231
ADDITIONAL CHANGES TO PERMIT:
1. A special condition vas added with requirements for a Mercury Minimization Plan.
2. The permit includes a special condition with new requirements for electronic reporting of
DMRs.
Proposed Schedule for Permit Issuance:
Draft Permit to Public Notice: August 12, 2015
Permit Scheduled to Issue: October 15, 2015
State Contact:
If you have any questions on any of the above information or on the attached permit, please contact
Teresa Rodriguez at [phone].
Name:
Date: `//0//,j
Page 5 of 5

Rodriguez, Teresa
From: Mike Acquesta <[e-mail]>
Sent: Friday, August 07, 2015 12:05 PM
To: Rodriguez, Teresa
Subject: Re: Louisburg NPDES permit
You are correct. We decided not to pursue the capacity increase to 1.5 mgd. We agreed to leave the plant
capacity at its current flow rate.
Mike Acquesta
On Friday, August 7, 2015, Rodriguez, Teresa <Teresa.Rodriguez(a7ncdenr.gov> wrote:
Mike, I have the draft permit almost ready to go out to public notice but I wanted to verify one issue before
sending it out. The permit application included a request to increase the flow to 1.5 MGD. If I remember
correctly we discussed this in a meeting we had late last year and the final decision was not to pursue it for now
since it will require an Engineering Alternative Analysis and an Authorization to Operate. Please verify that this
is correct.
Thanks,
Teresa
Teresa. Rodri,�uer�
NPDES Co-m*4 . Per tr tti.410- U vu.t
NCDENR/Dwids4.o v o f Water ReSouu-ceik
T. 919-807-6387 F. 919-807-6489
E-naadl.correspondenceito- arid-fronvthisaddress may be/ subject to -the.
NortIvCa.roiina.PulrliaRecorc1 Law c & may ls, di4closed,to- thivdiparties:
Michael S. Acquesta
Sent from Gmail Mobile
i

UTSBURG
■����-MEM---INMMI=I Ma-
I----WMMIBMMN----_■
April 1, 2014
Mr. Tom Belnick, Supervisor
NC Department of Environment and Natural Resources
NPDES Permit Unit
1617 Mail Service Center
Raleigh, NC 27699-1617
Re: NPDES Permit Renewal Application
Town of Louisburg Water Reclamation Facility
NPDES Permit No. NC0020231
Dear Mr. Belnick:
RECEI\/EDIDENR/DWR
APR - 3 2014
Water Resources
Permitting Section
Please find herewith one (1) complete copy of the Louisburg Water Reclamation Facility
NPDES Permit Renewal Application. If any additional information is needed during your
review, please let me know right away and the Town will provide it.
Please note that the Town of Louisburg employed the services of our Consulting Engineer, Dr.
Michael S. Acquesta, PE, for the preparation of the Permit Renewal Application. Doctor
Acquesta was one of the original design engineers for the plant in the early 1990's. He
understands all of the details about the original plant design and is very qualified to prepare the
NPDES Permit Renewal Application. He is available to provide additional information to you
during your review. Please accept this as formal authorization for you to contact him directly for
additional information, as well. He can be contacted at [phone] Mobile, [phone]
Office, or macquesta(a),mesco.com.
Also, please note that the Louisburg Water Reclamation Facility was originally designed at a
capacity of 1.50 MGD. The funding agency of the design and construction (NCDENR
Construction Grants and Loans at that time) would only allow the plant to be permitted at 1.37
MGD. However, the funding agency did allow the plant to be built at the capacity of 1.50 MGD.
The original plant design notes from the Town's Engineer are included with the NPDES Permit
Renewal Application. Please accept this as the Town of Louisburg's formal request that the
renewed NPDES Permit be issued at the 1.50 MGD capacity. If you need additional
documentation, please contact the Town or our Engineer noted above.
Thank you for your service to the Town of Louisburg.
Sincerely,
Karl T. Pernell, Mayor
Town of Louisburg, 110 W. Nash St., Louisburg, N.C. 27549 • [phone] • FAX [phone]

Town of Louisburg
Water Reclamation Faciltiy
Biosolids Management Plan
NPDES No. — NC0020231
Biosolids generated by the Town of Louisburg's Water Reclamation Facility can be disposed of
by way of three different methods. During a typical week waste activated biosolids are
removed and gravity thickened to approximately 3% from the plant on two separate occasions.
Once thickened, biosolids are moved to one of two 650,000 gallon aerobic digesters for
storage, processing and analysis. Approximately 2,000,000 gallons of thickened processed
biosolids are transported and disposed of annually. The disposal methods are as follows:
Method One (Primary Method): Biosolids are land applied on approximately 60 acres in
Franklin County. The land owner is Carmen Parkhurst. This land application activity is
permitted under permit no. WQ0005981 held by the Town of Louisburg which is effective until
January 31, 2018. There are six fields on the property on which biosolids can be applied. The
fields are used to grow fescue hay crops. The permit allows a maximum of 180 dry tons that
can be applied to this application site annually. The Town contracts Granville Farms Inc. to
transport and apply thickened processed biosolids to this site. Tanker trucks are used to
transport the 3% thickened processed biosolids from the plant digesters to the permitted site.
Terra Gators are used to surface apply biosolids based on calculated loading rates. All
equipment used is furnished by Granville Farms Inc.
Method Two (Primary / Secondary Method): Biosolids are land applied on Granville Farms Inc.
land under permit no. WQ0000838. The Town utilizes Granville Farms Inc. land in conjunction
with the Towns permitted land on most every hauling event. Granville Farms Inc. is contracted
to transport and apply thickened processed biosolids from the Town regardless of which of the
above mentioned permitted sites are utilized. Tanker trucks are used to transport the 3%
thickened processed biosolids from the plant digesters to the permitted site and or sites. Terra
Gators are used to surface apply biosolids based on calculated loading rates. All equipment
used is furnished by Granville Farms Inc.
Method Three (Emergency Method): This method of biosolids disposal is utilized only in times
when wet weather conditions prevent land application. Biosolids are dewatered and
composted by McGill Environmental Systems. McGill owns and operates a composting facility
that reportedly produces a Class A compost product. McGill furnishes and operates or allows
Town Wastewater Operators to operate large roll off dewatering containers used to dewater
biosolid to approximately 14% caked solids. Once dewatered, McGill transports the dewatering
containers with the 14% caked solids to their composting process site to be processed into a
Class A compost. At this point the compost is the property of McGill Environmental Systems
and is disposed of using company methods.
Revised: March 19, 2014

INFLOW AND INFILTRATION ANALYSIS
TOWN OF LOUISBURG, NORTH CAROLINA
NPDES PERMIT NO. 0020281
MARCH 2014
2013
MONTH
WATER
SOLD
(GPD)
ESTIMATED
WATER TO
SEWER
(85% Of Water
Sold)
(GPD)
WASTEWATER
TREATED
(GPD)
ESTIMATED
INFLOW AND
INFILTRATION
(GPD)
PERCENT I/1
(%)
JAN
280,929
238,790
620,000
381,210
61.49%
FEB
356,586
303,098
656,071
352,974
53.80%
MAR
302,184
256,856
623,871
367,015
58.83%
APR
313,093
266,129
624,000
357,871
57.35%
MAY
313,823
266,749
60%032
342,283
56.20%
JUNE
366,373
311,417
753,000
441,583
58.64%
JULY
287,897
244,712
690,000
445,288
64.53%
AUG
337,752
287,089
610,000
322,911
52.94%
SEPT
378,647
321,850
630,000
308,150
48.91%
OCT
330,484
280,911
573,419
292,508
51.01%
NOV
365,053
310,295
581,000
270,705
46.59%
DEC
332,706
282,800
610,000
327,200
53.64%
Averages
330,461
280,891
631,700
350,808
55.53%

BY-PASS
ANOXIC/MIXING BASIN
PLANT INFLUENT
ADF O. 606 MGD a• -
DRAINAGE FROM
w
1-
J
w
0.606 MGD
X 3
MAIN PUMP
STATION
SLUGDE
HOLDING TANK
FOR LAND
APPLICATION
EXIST. SAND
DRYING BED
EXIST. SAND
DRYING BED
EXIST. SAND
DRYING BED
PLANT
Liam
EFFLUENT
z 0.606 MGD
� f'I GRIT
BAR SCREENS.
GRIT & GREASE
REMOVAL
310 kW STAND-BY
GENERATOR WITH
1600 AMP ATS
SLUDGE
L__J
r 0.814 MGD
0.208 MGD
THICKENER
BACKWASHATER
60 GPM
T Tf T
f.
CASCADE
AERATION
I
ALUM STORAGE &
FEED PUMP
iI i
HOlI
0.303
MGD
0.814 MGD
CAUSTIC SODA &
FEED PUMP
FLOW SCHEMATIC AND WATER BALANCE
LOUISBURG V WTP
NTS
UV UV UV
0.606 MGD
ULTRAVIOLET
DISINFECTION
0.606 MGD
METERING
FLUME
a
0
z
v
.11
Tam ROTOR
(TYP.)
65' DIA.
SECONDARY
CLARIFIERS &
RETURN SLUDGE
PUMP STATION
0.303 MGD
TERTIARY
FILTERS
EARTH TECH AECOM
701 CORPORATE CENTER DRIVE, SUITE 475, RALEIGH, NC 27607
919-854-6200 919-854-6259 (fax)
NPDES PERMIT RENEWAL
LOUISBURG, NC
PROJECT NO. 110881
Arc. ainoru nnnn

TREATMENT NARRATIVE
WATER RECLAMATION FACILITY
TOWN OF LOUISBURG
NPDES No. 0020231
The Town of Louisburg's 1.500 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, cascade aeration, 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 two channels —one channel filled with a
manually cleaned bar screen and the second channel filled with a mechani-
cally cleaned bar screen. Each screen has an average flow capacity of 1.50
MGD and a peak flow capacity of 3.0 MGD. The mechanical bar screen
has a bar spacing of 3/8". The mechanical screen automatically discharges
the screenings onto a screw conveyor, which then discharges into a dump-
ster. The hand raked screenings, when needed, are deposited into a drain
basin and then shoveled into the dumpster. The screenings are disposed of
at the Franklin 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.
Page 1 of 5

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 fiilly 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.
The original basin mixers were replaced in 2009. The old mixers had ma-
jor seal problems. The new mixers have three (3) blades, each 29.5" in
diameter and constructed of polyurethane. The submersible motors are
15.4 Hp each. The new mixers have proven to more completely mix the
contents of the oxidation ditches with less horsepower.
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.
Page 2 of 5

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.
Covers were added in 2009 over the effluent channel of each clarifier. The
covers consist of aluminum plates hinged to the clarifier walls to allow
raising of each cover for inspection purposes. The covers have helpd sig-
nificantly in keeping the build-up of algae under control in the effluent
channels
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 arc housed in the caustic feed pump
building. This equipment would be used in case of a plant upset and to
date has been used.
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.
S. Tertiary Filters:
Deep bed tertiary filters are used to remove BCD 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
Page 3 of 5

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. The cascade aerator is 5'-0" wide,
has seven steps with a total elevation drop of 7'-9". Each step has a trcad
width of 18" and a riser height of 12" An 18-inch ductile iron effluent
pipe is provided at the bottom of the aerator.
11. Metering and Sampling:
The influent is sampled by using a refrigerated composite sampler located
at the head of the bar screens. Construction is under way to replace the
existing sampler with a new refrigerated composite sampler. The new
sampler should be installed by September 2009.
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. Construction is under way to
replace the existing sampler with a new refrigerated composite sampler.
The new sampler should be installed by September 2009.
12. Sludge Digester:
An aerobic sludge digester with a capacity of 650,000 gallons is used to
treat the wasted sludge from the treatment process. One 25 Hp mixer in
conjunction with two aspirators and the digester recycle pumps are used
to aerobically digest the sludge.
13. Sludge Holding Tank:
The stabilized sludge that is produced in the digester is disposed of by
land application. The sludge holding tank is a mirror of the digester such
that it can also be used tp digester the sludge. The holding tank has a ca-
pacity of 650,000 gallons. One floating mixer in conjunction with two
aspirators are used to re -aerate the sludge and keep it mixed. The holding
Page 4 of 5

toit
Tank may be used as the digester when additional digestion time is needed or
when maintenance is being performed on the first digester.
14. Sludge Dewatering System:
Polymer is added to the sludge holding tank in order to thicken the sludge
before it is hauled away. Polymer is added to a mixing tank and then feed
into the holding tank. The existing mixer mixes the polymer and sludge
together. The mixture is allowed to settle before it is pumped into the
tanker truck. The sludge is thickened to approximately 3% before it is
hauled and land applied.
15. 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.
16. Septage Receiving Station:
A septage receiving station was added in 2009 at the influent pump sta-
tion. The station has a capacity of 400 gpm, a bar spacing of 1/4 inch, a
flow meter, a keypad security access system, and an invoicing system.
The screened effluent is discharged into the influent pump station wetwell.
The screenings are washed, compacted and discharged into a dumpster.
The screenings are disposed at the Franklin County Landfill.
Page 5 of 5

PLANT INFLUENT
ADF=0.606 MGD
DRAINAGE FROM DRYING
0.606 MGD
X 3
MAIN PUMP
STATION
SLUGDE
HOLDING TANK
FOR LAND
APPLICATION
- EXIST. SAND
DRYING BED
EXIST. SAND
DRYING BED
GRIT
BY—PASS
ANOXIC/MIXING BASIN
a
BAR SCREENS, I 0.814 MGD
GRIT & GREASE
REMOVAL
310 kW STAND—BY
GENERATOR WITH
1600 AMP ATS
SLUDGE
nal
L
SLUGDE
DIGESTER
wl
Sp
0
0.208 MGD
THICKENER
4-
BACKWASH WATER
60 GPM
ALUM STORAGE &
FEED PUMP
a NolivaIXO
0.407 MGD
0.303
MGD
0.814 MGD
CAUSTIC SODA &
FEED PUMP
PLANT
Eng
EFFLUENT
0.606 MGD CASCADE
AERATION
FLOW SCHEMATIC AND WATER BALANCE
LOUISBURG VWVfP
NTS
UV
UV
UV
0.606 MGD
ULTRAVIOLET
DISINFECTION
0.606 MGD
METERING
FLUME
----,;\)
a NOIldaIXO
0.407 MGD
{
ROTOR
(TYP. )
65' DIA.
SECONDARY
CLARIFIERS &
RETURN SLUDGE
PUMP STATION
0.303 MGD
TERTIARY
FILTERS
EARTH TECH AECOM
701 CORPORATE CENTER DRIVE, SUITE 475, RALEIGH, NC 27607
919-854-6200 919-854-6259 (fax)
NPDES PERMIT RENEWAL
LOUISBURG, NC
PROJECT NO. 110881
DATE: MARCH 2009
FILE NAME: 110881_FlowSchem.dgn

Louisburg Water
Reclamation Facility
Excerpt of Louisburg USGS Quad Sheet