NC0025241_Draft Permit_20250708

Docusign Envelope ID: C9ACB2F8-FB2F4A2S978D•C38AE8261DAP
JOSH STEIN
Gme,o
D. REID WILSON
Sr,rrtae)
RICHARD E. ROGERS, JR.
Dbrrmr
Mr. Todd Taylor, Executive Director
Orange Water and Sewer Authority
400 Jones Ferry Rd
Carrboro, North Carolina 27510
Dear Mr. Taylor:
NORTH CAROL INA
fnrtronmental Quality
July 7, 2025
Subject: Draft NPDES Permit Renewal
Permit NCO025241
Mason Farm WWTP
Orange County
Grade IV Biological WPCS
SIC Code 1952
Enclosed with this letter is a copy of the Draft NPDES permit renewal for your facility. Please
review this draft carefully to ensure thorough understanding of the requirements and conditions it
contains. There are several changes from the existing permit, including the following:
• The facility's system component list was updated per consultation with facility personnel
(see Supplemental to Cover Sheet).
• Based on the reasonable potential analysis (RPA) showing reasonable potential to violate
state water quality standards, Nitrate -Nitrogen (NO3-N) limits have been added to the
permit and the quarterly monitoring requirement has been changed to monthly monitoring
[See A.(1)].
• Based on Mercury TMDL evaluation showing mercury values reported at levels > 1 ng/L
and since the permitted flow is greater than 2 MGD, Special Condition A.(9.) Mercury
Minimization Plan has been added to the permit.
• A special condition to monitor effluent PFAS chemicals quarterly has been added to the
permit, to be effective six (6) months after EPA has a wastewater method in 40 CFR 136
method published in the Federal Register [See Special Condition A.(10.) PFAS
Monitoring Requirements].
• Some of the wording has changed in Special Condition A.(3.), Chronic Toxicity Permit
Limit, please review each paragraph carefully.
• Special Condition A.(4.) has been modified to include the specific three years in which the
Effluent Pollutant Scan shall be performed (2027, 2028, and 2029). In addition, at the end
of the Special Condition, 2n' species Toxicity Testing Requirements for municipal permit
renewals per Federal Regulations [40 CFR 122.210)(5)] have been added.
• A notation was made concerning the Electronic Reporting Rule — NPDES Electronic
Reporting Rule — Phase 2 Extension. EPA extended the Phase 2 deadline to December 21,
2025.
D_E Q� North Carolina Deparanant of Environmental Quality I Division of Water Resources
512 North Salisbury Street 11617 Mail Scmce Center I Raleigh, North Carolina 27699A611
9n rr." 919.707.9000

Docusign Envelope ID. C9ACB2F8-FB2F-4A25-978D-C38AE8261 DAA
Federal regulations require electronic submittal of all discharge monitoring reports
(DMRs) and program reports. The requirement to continue reporting discharge monitoring
data electronically using the NC DWR's Electronic Discharge Monitoring Report (eDMR)
internet application has been added to your NPDES permit [See Special Condition A.(I 1.)].
The topographic map legend has been revised to reflect basin and subbasin updates.
The NPDES standard conditions (Parts 11, III, and IV) that are a part of the permit are not included
in this draft document (cover, map, and Part I). The conditions are the same as in your current
permit except that agency and division names have been updated. The latest version is available at
httos://bit.ly/3k5NFaL and can be viewed online or downloaded as a PDF file.
Concurrent with this notification the Division is publishing a notice in a newspaper having
circulation in the general Orange County area, soliciting public comments on this draft permit.
Please provide any written comments you may have to the following: NCDEQ/DWR, NPDES
Permitting Branch, 1617 Mail Service Center, Raleigh, NC 27699-1617 no later than 30 days after
receipt of this draft permit.
Following the 30-day public comment period, the Division will review all pertinent comments and
take appropriate action prior to issuing a final permit. If you have questions concerning this draft
permit, please call me at [phone] or by email at [e-mail].
Sincerely,
[Docu6pMe by:
6ar11 Ptrint�e.►^
Gary Perlmutter, Environmental Specialist II
NPDES Municipal Permitting Unit
Hardcopy: NPDES Files
eCopy: US EPA Region 4
DWR / Raleigh Regional Office / Water Quality / Vanessa Manuel
DWR / Operator Certification Program / Jeff Talbot & Renee V. Thompson
DWR / Ecosystems Branch / David A. Hill
DWR / Aquatic Toxicology Branch / Cindy Moore & Molly Nicholson
DWR / Public Water Supply / Tresha Price
OWASA / Wil Lawson
D_E Q�� North Carolina Depv�m entofEnviruoenW Quality I Division of Water Resources
512 North Salisbury Street 1 1617 NWI Service Center I Raleigh, North Carolina 276994611

Docusign Envelope ID: C9ACB2F8-FB2F4A25-978D-C38AE8261DAA
Permit NCO025241
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENTAL QUALITY
DIVISION OF WATER RESOURCES
PERMIT
TO DISCHARGE WASTEWATER UNDER THE
NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM
(NPDES)
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, the
Orange Water and Sewer Authority
is hereby authorized to discharge wastewater from a facility located at the
Mason Farm WWTP
170 Old Mason Farm Road
Chapel Hill, North Carolina
Orange County
to receiving waters designated as the Morgan Creek in the Cape Fear River Basin in accordance with the
effluent limitations, monitoring requirements, and other applicable conditions set forth in Parts I, II, III,
and IV hereof.
This permit shall become effective Month 1, 20yy.
This permit and authorization to discharge shall expire at midnight on July 31, 2030.
Signed this day Month xx, 20yy.
DRAFT
Karen Preston, Municipal Permitting Unit Supervisor
Division of Water Resources
Page 1 of 15

Docusign Envelope ID: C9ACB2F8-FB2F-4A25-978D-C38AE8261DAA
Permit NC0025241
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 effective date, 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.
Orange Water and Sewer Authority
is hereby authorized to:
1. Continue to operate and maintain the Mason Farm WWTP, an'existing 14.5 MGD facility consisting
of the following components: j
Influent screen
Grit removal
Primary clarifiers
Aerobic/anoxic basins
Secondary clarifiers
UV disinfection system
Primary sludge fermenter
Anaerobic digesters
2.
Page 2 of 15
:d on the attached map via Outfall 001 into
Fear River Basin and 03030002 HUC.

Docusign Envelope ID: C9ACB2F8-FB2F-4A25-978D-C38AE8261DAA
Permit NCO025241
PART
A.(1.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS [14.5 MGD]
[I5A NCAC 02B .0400 et seq., 15A NCACO2B .0500 et seq.]
Grade IV Biological Water Pollution Control System [15A NCAC 08G .03021
(a.) During the period beginning on the effective date of the permit and lasting until expiration, the
Permittee is authorized to discharge treated municipal from Outfall 001. Such discharges shall be
limited and monitored' by the Permittee as specified below:
PARAMETER
Parmnerer Code
EFFLUENT LIMITS
MONITORING REQUIREMENTS
Monthly
Average
Weekly
Average
Daily
Maximum
Measurement
Frequency
Sample
Type
Sample
Location
Flow 50050
14.5 MGD
1-1'\
Continuous
Recording
Influent or Effluent
Total Monthly Flow (MG) 82120
Monitorand`Report
Monthly
Calculated
Effluent
CBOD, 5-day, 20°C a C0310
(Apr 1 - Oct 31)
4.0 mg/L
/.0 mg/L
/
\ \
\
2/week'
Composite
Influent &
Effluent
CBOD, 5-day, 20°C2
(Nov 1 - Mar 31) C0310
8.0 mg/L
\2.` g/L
^
\ r
\ e\
Composite
Influent &
Effluent
Total Suspended Solids (TSS)z C0530
/30.mg/L
45.0'n�g/Iti/
/
2/week)
Composite
Influent &
Effluent
NHr as N (Apr 1 - Oct 31) C0610
\LQ.T /L,
3.0 mg/L\
2/week;
Composite
Effluent
NHr as N (Nov 1 - Mar 31) C0610
2:0 ini/Is
\6.0 mg/L
\
2/week
Composite
Effluent
Fecal Coliform
(geometric mean) �16/6
\
200(10\mi,
400 ODrt`
\
\\
2/week'
Grab
Effluent
PH 00460\
Between�6.0 and,9.0 Standard
Unfts\/\\\
Daily
Grab
Effluent
Dissolved Oxygen (DO) ( f 00300
DailY'Average'L 6.0 mg/L
Daily
Grab
Effluent
Temperature (°C) \ 00010 N
Monitor and Report
Daily
Grab
Effluent
Conductivity (pmhos/cm) \00094/
L Monitor and Report
Daily
Grab
Effluent
Total Residual�Chlorine (TRC)° \50060
\ \
18 µg/L
Daily
Grab
Effluent
Nitrate as N (NO3-N)— 01042 (
10.4 agtL
\ \%
M & R
Monthly
Composite
Effluent
TKN (ing/L)' \ 00615\
\� Monitor)and Report
Weekly
Composite
Effluent
NOrN- NOrN (mg/L) \ ,00630
Monitor and Report
Weekly
Composite
Effluent
TotalNitrogen,(N' (mg/L) `C0600
�\ \ Monitor and Report
Weekly
Calculated
Effluent
TN Load 6' QM600
\ QY600`
Monitor and Report (lb/month)
409,448 lb/yr
Monthly
Annually
Calculated
Effluent
Total Phosphorus (FP) (mg/L) C0665
Monitor and Report
Weekly
Composite
Effluent
�- &665J
TP Load sa \ IQY665
Monitor and Report (lb/month)
134,375 Ib/yr
Monthly
Annually
Calculated
Effluent
PFAS (ng/L) \v_ar'ious
Monitor and Report
Footnote 8
Grab
Effluent
Chronic Toxicity v TGP3B
Monitor and Report
Quarterly
Composite
Effluent
Effluent Pollutant Scan ro NCO!
Monitor and Report
Footnote 10
Footnote 10
1 Effluent
Footnotes:
I. The Petmittee shall submit Discharge Monitoring Reports electronically using NC DWR's eDMR application
system. See Special Condition A.(I1.).
2. The monthly average effluent CBODs and TSS concentrations shall not exceed 15% of the respective influent
value (85% removal).
Footnotes continue on the next page.
Page 3 of 15

Dowsign Envelope ID: C9ACB2F8-FB2F-4A25-978D-C38AE8261DAA
Permit NC0025241
Footnotes continued from A.f 1.) Effluent Limitations and Monitorine Requirements:
3. Twice per week sampling must occur on any two non-consecutive days during the calendar week.
4. The facility shall monitor TRC when using chlorination for disinfection. The Division shall consider all effluent
TRC values reported below 50 µg/L to be in compliance with the permit. However, the Permittee shall continue
to record and submit all values reported by a North Carolina certified laboratory (including field certified), even
if these values fall below 50 µg/L.
5. 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.
6. TN Load and TP Load are the mass loads of TN and TP discharged by the Permittee in a period of time. See
Special Condition A.(7.).
7. Compliance with these limits shall be determined in accordance with Special Condition A.(6.), Annual Limits for
Total Nitrogen and Total Phosphorus.
8. See Special Condition A.(10.).
9. Chronic Toxicity (Ceriodaphnia dubia) at 90%with testing in February, May, August and November. See Special
Condition A.(3.). �% \ , .
10. The Permittee shall perform three effluent pollution scans during the tetmof, this permit. See Special Condition
A.(4.). / \ \'\,
There shall be no discharge of floating solids or visible -foam in other than trace amounts.
A.(2.) INSTREAM MONITORING REQUII2EMENTS� \
[I SA NCAC 02B:OSg.]\\
Sample Location r
Measurement Frequency
Parameters 2.3
Sample Type
1 I 1
Octo\rZMay
\ \
\ Weekly \\
Temperature
Dissolved Oxygen (DO)
/1JP1/��
Conductivity
Fecal Coliform
June - Septemb6
�� 3/week%
( DNI
\ \
tit
Total Phosphorous
DI12�
\` \'�`
PO4
June-Sepp\>�r
- Once every 2 weeks
NH3
�\
Total Kjendahl Nitrogen
Grab
NOx
`1
Temperature
Dissolved Oxygen (DO)
DN3
DN4
Apnl-October
v /
Monthly 4
Conductivity
Fecal Coliforrn
Secchi depth
Chlorophyl -a
Footnotes:
1. Sample locations:
UPI — Upstream location at Morgan Creek at the bridge at the plant entrance
DNI —Downstream location #I at Morgan Creek at the cement ford downstream ofoutfall
DN2 — Downstream location 42 at Morgan Creek at the Farrington Road bridge
DN3 — Downstream location # 3 at Morgan Creek at the mouth of Morgan Creek
DN4 - Downstream Location # 4 at Jordan Lake at the old railroad grade
Footnotes continue on next page.
Page 4 of 15

Docusign Envelope ID: C9ACB2F8-FB2F-4A25-978D-C38AE8261DAA
Permit NC0025241
Footnotes continued from A.(2.) Instream Monitoring Reouirements
2. Sampling for Temperature and DO at the surface and one -meter intervals to a depth equal to the Secchi depth. If
the Secchi depth is less than 1.0 meters, sample at 0.5-meter intervals.
3. Instream sampling (Upstream and Downstream monitoring) is waived for all parameters as long as the Permittee
retains membership in the Upper Cape Fear River Basin Association (UCFRBA), which is conducting a
coordinated instream monitoring effort. If the Permittee's membership in the UCFRBA is terminated, the Permittee
must immediately notify the Division in writing, and the instream monitoring requirements specified in this permit
shall be reinstated immediately.
4. Monthly sampling at DN3 and DN4 should be separated at least two weeks within the appropriate month.
A.(3.) CHRONIC TOXICITY PERMIT LIMIT (QUA
[15A NCAC 02B .0200] [15A NCAC 02B .0500 et
The effluent discharge shall at no time exhibit observable it
to Ceriodaphuia dubia at an effluent concentration of,90°i
The permit holder shall perform at a minimum, auar
"North Carolina Ceriodaphnia Chronic Efflueni\1
subsequent versions) or "North Carolina Phase II
(Revised December 2010, or subsequent versions).
February, May, August, and Novet 1ber.­These 1
toxicity testing quarter assigned to the facility. Efflu
representative effluent discharge and shall be p rfoor,
below all treatment processes. ,
If the test procedure I
the permit limit, then,
two following months
Procedure" (Revised -
All
for the pass/fail results
be sent to the followinf
North
Or, results can be sent to the
or significant mortality
monitoring using test procedures outlined in the
say Procedure," (Revised December 2010, or
Dnic Whol6,Effluent Toxicity Test Procedure"
tests,will,b�e performed Nduring the months of
hs,signify the first month of'each three-month
ampling for this testing must be obtained during
at the NI DES permitted final effluent discharge
first test of any'single quarter rbsults in a failure or ChV below
tration testing shall be performed at a minimum, in each of the
North Carolina Phase II Chronic Whole Effluent Toxicity Test
osubsequent ersians).
Irt ofthissppermit condition will be entered electronically using the
in which tests were performed, using the parameter code TGP3B
he.Chronic Value. Additionally, DWR Form AT-3 (original) is to
Division of Water Resources
Section/Aquatic Toxicology Branch
ice Center
599-1621
[e-mail].
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.
Page 5 of 15

Docusign Envelope ID: C9ACB2F8-FB2F4A25-978D-C38AE8261DAA
Permit NC0025241
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 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 limiis� \
NOTE: Failure to achieve test conditions as specified n th�\esr cite\ ument, 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'.
Page 6 of 15

Docusign Envelope ID: C9ACB2F8-FB2F-4A25-978D-C38AE82610AA
Permit NC0025241
A.(4.) ADDITIONAL MONITORING REQUIREMENTS FOR PERMIT RENEWAL
[G.S. 143-215.1(b)]
(a.) Effluent Pollutant Scans. 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: 2027,
2028, and 2029. 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. Each annual sample shall coincide with one quarterly toxicity test
each year [see Condition A.(3.) Chronic Toxicity Permit Limit], and each must be collected in a
different calendar quarter to 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) C0610 Trans-1,2-dichloroethylene 34�5546 Bis (2-chloroethyl) ether 34273
Chlorine (total residual, TRC) 50060 1,1-dichloroethylene 34501 Bis (2-chloroisopropyl) ether 34283
Dissolved oxygen 00300 1,2-dichloropropme C0541 Bis (2tthythexyl) phthalate C0100
Nitrate I Nitrite 00630 1,3-dichloropropylene 77163 4-bromophenyl phenyl ether 34636
Kjeldahl nitrogen 00625 Ethylbenzene 34371 \Butyl benzyl phthalate 34291
Oil and grease 00556 Methyl bromide 34413\2-chloronaphthalene 34581
Phosphorus C0665 Methyl chloride 34418 4-chlorophenyl phenyl ether 34641
Total dissolved solids 70295 Methylene chloride /34423 Chryse, 34320
Hardness 00900 1,1,2,2-tetmchloroeWone \34511
81549 Di-n-butylphibalate 39110
Antimony 01097 7euachloroethylene34475 Di-n-octyl pirthalate 34596
Arsenic 01002 Toluene�\34010 Dbenw(ah)antbmcene 34556
Beryllium 01012 L1 -.c oroethane3,45506 1,2-dichlorobenzene 34536
Cadmium 01027 l,L i hloroethan 1,34chlorobenzene 34566
Chromium C003.4 Trichloroet�h' lene \> 39180� 1,4-dichlorobemene 34571
Copper 01042 \Vinyl chl0 We / 39175 3,3-dichlorobenzidine 34631
Lead �OIOS�AcId-earoclable compounds Diethyl phthalate 34336
Mercury (Method 1631E) COhfER \I PcWaro-m-cresol 34452 Dimethyl phthalate 34341
Nickel 01067 / 2, lorophenol 34586 2,4-dinitrotoluene 34611
1
Selenium 0 \47 /,4=dichlBrophrnol 34601 2,6-dinitrotoluene C0626
Silver 01077\ C 2,4-d�methylphenol 34606 1,2-diphenyllrydmzine 34346
Thallium 01059 \ *4;6-dinitroo-eresoJ 34657 Fluoranthene C0376
Zinc 01092 \\2,4- initrophenol 34616 Fluorene 34381
Cyanide 00720 2-ni phenol 34591 Hexachlorobenzene C0700
Total phenolic compounds 3273Q 4-mtrophenol 34646 Hexachlorobutadirne C0702
Volatile oreanle compounds: \/1I Pentachlorophenol 39032 Hexachlorocyclo-pentadiene 34386
Acrolein 34210 Phenol 34694 Hexachloroethane 34396
Acrylonitnle 34215 2,4,6-trichlorophmol 34621 1ndeno(1,2,3-cd)pyrene 34403
Beniene 4030 .Base -neutral compounds. Isophorone 34408
Bromoform 32104 Acenaphthene 34205 Naphthalene 34696
Carbon tetrachloride 32102 Acenaphthylene 34200 Nitrobenzene 34447
Chlorobemcne 34301 Anthracene CO220 N-nitrosodi-n-propylamine 34428
Chlorodibromomethane 34306 Benzidine 39120 N-nitrosodimethylamine 34438
Chloroethane 85811 Benzv(a)anthracene C0526 N-nitrosodiphenylamine 34433
2-ehloroethyl vinyl ether 34576 Benzo(a)pyrene 34247 Phenanthrene 34461
Chloroform 32106 3,4 benzoBuomnthrne 34230 Pyrene 34469
Dicldorobromomethane 32101 Benzo(ghi)perylene 34521 1,2,4-trichlorobenzene C0551
l,l-dichloroethme 34496 Beaw(k)tluomnthene 34242
1,2-dichloroethme 32103 Bis (2-chloroethoxy) methane 34278
Page 7 of 15

Docusign Envelope ID: C9ACB2F8-FB2F-4A25-978D-C3aAE8261DAA
Permit NC0025241
(b.) Effluent Scan Reporting. Test results shall be reported electronically via eDMR by December 31 st
of each designated sampling year, except that, subject to prior written approval by the Director, results
can be reported on DWR Form DMR-PPA-1 or other form approved by the Director. The Permittee
must at least report completion of the test in the eDMR system by entering "1" or "Y" for parameter
code NCO - Annual Pollutant Scan. If written reports are approved, the report shall be submitted to
the following address:
North Carolina Division of Water Resources
Central Files
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
Or the form may be uploaded at:
https://edoes.deq.nc.gov/Forms/NPDES—WW-EDMR-Supplemental-Form
(c.) 2"d Species Toxicity Testing and Reporting.
(d.) In addition to the quarterly toxicity tests required in Condition A.(3.) Chronic Toxicity Permit Limit,
the Permittee shall perform and report the results of four (4) toxicity tests using the same test methods
using a second species of test organism suitable to the tests being conducted.
(e.) The 2"d species toxicity tests shall be conducted either:
(A) Once per quarter in a single 12-month period (four samples); if this option is chosen, the
sample for each 2nd species test shall coincide with the quarterly samples collected for
A.(3.) Chronic Toxicity Permit Limit; or
(B) Once per 12-month period in the four -and one-half year period prior to the scheduled
application for permit renewal (four.samples); if this option is chosen,three of the
samples for the 2"d species test shall coincide with those for the annual effluent scans and
the coincident quarterly toxicity test, and each of the four annual samples shall be
collected in a different calendar quarter in order to represent seasonal variation.
(f.) The results of the toxicity tests shall be submitted to the following address:
North Carolina Division of Water Resources
Water Sciences Section/Aquatic Toxicology Branch
1621 Mail Service Center
Raleigh, North Carolina 27699-1621
Or, results can be sent,to the email, [e-mail].
(g.) Results of the 2°d. species tests shall also be summarized in Part E (Toxicity Testing Data) of EPA
Municipal Application Form 2A when submitting the permit renewal application to the NPDES
Wastewater Program.
The Permittee may contact the Division's Aquatic Toxicology Branch at 919-743-8401 for
guidance on conducting the additional toxicity tests and reporting of the results.
Page 8 of 15

Docusign Envelope ID: C9AC82F8-FB2F-4A25-978D-C38AE8261DAA
Permit NCO025241
A.(5.) NUTRIENT ALLOCATIONS
[15A NCAC 02B .02701
(a.) The following table lists the Total Nitrogen (TN) and Total Phosphorus (TP) allocations assigned to,
acquired by, or transferred to the Permittee in accordance with the Jordan Lake nutrient management
rule (T15A NCAC 02B .0270) and the status of each as of permit issuance. The allocations in this
table are not enforceable limits nor do they supersede any TN or TP limit established elsewhere in
this permit or in the NPDES permit of a compliance association of which the Permittee is a Co-
Permittee Member.
Total Nitrogen Allocation ^
ALLOCATION
SOURCE
DATE
ALLOCATION
AMOUNT (')
STATUS
Delivered Ib/ r
Discharge b/ r
TYPE
Assigned by Rule
^
Base
(T15A NCAC 02B
8/11/09
(84//,656
134,375
Active
.0270)
TOTAI/
r/ 84,656
\134,,375
Active
Footnote: \ \
1. Nitrogen Transport Factor = 63% \\\\\\\)
Total _Phosohorus Allocation'
ALLOCATION
SOURCE
DATE
ALLOCATION
AMOUNT ")
STATUS
Delivered Iti(r
Discharge Ib
TYPE
-
Base
Assigned by Rule
(T15ANCAC 02B
10099
4,789 \
10,188
Active
i0270)\
1
TOTAL`
//4,789�
V 10,188
Active
(b.)
Footnote:
1. Phosphorus
permit and shall`be subject+to the
Id federal rules
Page 9 of 15
ation(s) (other than to correct typographical
ms shall be considered a major modification
process afforded such modifications under

Docusign Envelope ID: C9ACB2F8-FB2F-4A25-978D-C38AE8261DAA
Permit NC0025241
A.(6.) ANNUAL LIMITS FOR TOTAL NITROGEN OR TOTAL PHOSPHORUS
[15A NCAC 02B .02701
(a.) Total Nitrogen (TN) and Total Phosphorus (TP) allocations and load limits for NPDES dischargers
in the Jordan Lake watershed are annual limits and apply on a calendar year basis.
(b.) 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.
(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 remaining days of that year, and each day of such continuing violation shall constitute a separate
violation. ` •�
(d.) The TN (or TP) Load limit in this Permit 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 ProgtarLor other source allowed
under applicable regulations; purchase; sale,.trade, or lease of allocation between the Permittee
and other dischargers; regionalization; and•other transactions approved•by the Division.
(ii.) The Permittee may request amodification of th\ (orTP) Load limit in thisTermit to reflect
allowable changes in its allocahon(s�,
(A) Upon receipt of timely�and'Rr pea pplicatio \ the Division will modify the permit as
appropriate and in accordance with state and federal,program requirements.
(B) Changes in TN (or TP) limits become effective on January 1 of the year following permit
modification The Division must receiye application no later than August 31 for changes
(iii.) Any
(e.) If the'Permittee is a membec.and co-permittee of an approved compliance association on January 1
of a given year, its TN andNTP\discharges during that year are governed by that association's group
NPDES permit and the limits therein.
(i.) The Pennittee shall be considered a Co-Permittee Member for any given calendar year in which
it is identified as sucli in Appendix A of the association's group NPDES permit.
(ii.) Association roster) 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.
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Dowsign Envelope ID: C9ACB2F8-FB2F-4A25-978D-C38AE8261 DAA
Permit NCO025241
A.(7.) CALCULATION AND REPORTING OF TOTAL NITROGEN AND TOTAL
PHOSPHORUS LOADS
[15A NCAC 02B .0270]
(a.) The Permittee shall calculate and report monthly and annual TN and TP Loads as follows:
(i.) 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
TNT = the Total Monthly Flow of wastewater discharged during the
month (MG/mo)
8.34 = conversion factor, from (mom x MG) to pounds
i
(ii.) ii. Annual TN (or TP) Load (Ib/yr) = Sum o Zhe ,12 Monthly TN (or TP) Loads for the
calendar year \ \\\
(b.) 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 sha\r\ rt each calendar year's
results (lb/yr) with the December report fortthat,.year.
A.(8.) NUTRIENT MONITORING
[G.S. 143-215.1(b)]
Pursuant to N.C. General Statutes Section
North Carolina Arlin
02H.0I14(a), and Par
permit to require sup]
support water quality
monitoring plan devel
A.(9.) MERCURY MINIMIZ
[G.S. 1`43 215.1 (b)] \
The Permittee shall develop and
shall be developed within 180 d;
A sample MMP was developed
website for guidance (hups: //dei
and
215. 1 and the implemenfing rules found in Title 15A of the
ipter 02HspecificcalyN5�A NCAC 02H.0112(b)(1) and
1N13� of this Permit, the Director of DWQ may reopen this
ring of the discha ge.-The additional monitoring will be to
the Cape Fear River Basin, and shall be consistent with a
ion and affected stakeholders.
:nt a mercury minimization plan during this permit term. The MMP
permit effective date and shall be available for inspection on -site.
a stakeholder review process and has been placed on the Division
20130801). The MMP should lice 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.
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Domslgn Envelope ID: C9ACB2F8-FB2F-4A25-978D-C38AE8261DAA
Permit NC0025241
A.(10.) PFAS MONITORING REQUIREMENT
[G.S. 143-215. 1 (b.)]
This reporting requirement for the per- and polyfluoroalkyl substances (PFAS) parameters listed under
Table 1 of EPA Method 1633, Revision A (1633A) takes effect the first full calendar quarter following six
(6) months after EPA publishes the method under 40 CFR Part 136 in the Federal Register. Monitoring
will be at a quarterly frequency.
Find the current parameters listed under Table I of Method 1633A Analysis of Per- and Polyfluoroalkyl
Substances (PFAS) in Aqueous, Solid, Biosolids, and Tissue Samples by LC-MS/MS (EPA, December
2024) at: /
https://www.epa.gov/system/files/documents/2024 -2024-508-
compliant.pdf
A.(11.) ELECTRONIC REPORTING - DISCHARGE MONITORING REPORTS
[G.S. 143-215.1 (b)] �\ �
Federal regulations require electronic submittal of all discharge monitoring reports (DMRs) and program
reports. The final NPDES Electronic Reporting.Rule was adopted and became effective on December 21,
2015. \ �� �.
NOTE: This special
(Standard Conditior
• Section B. (11
• Section D. (2.)
1. Reportihe Requirements [Supersedes.Section D. (2.) and Section
The permittee shall report'discharge monitoring data electronically
Dischargonitoring Report�(eDMR) lntem e Met application.
within Part II ofthis permit
NC DWR's Electronic
Monitoring results obtained during the previous month(s) shall be summarized for each month and
submitted monthly electronically/using eDMR The eDMR system allows permitted facilities to enter
monitoring data and submit DMRs electronically using the Internet. The eDMR system may be
accessed at: https://deq.ne.gov/about/divisions/water-resources/edmr.
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 following address:
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Docusign Envelope ID: C9ACB2FB-FB2F-4A25-978D-C38AE8261DAA
Permit NC0025241
NC DEQ / Division of Water Resources / Water Quality Permitting Section
ATTENTION: Central Files
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
See "How to Request a Waiver from Electronic Reporting" section below
Monitoring results obtained during the previous month(s) shall be summarized for each month and
reported via the eDMR system no later than the last calendar day of the month following the completed
reporting period. 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.
Starting on December 21, 2025, the permittee must electronically report the following compliance
monitoring data and reports, when applicable:
• Sewer Overflow/Bypass Event Reports; and
• Pretreatment Program Annual Reports; and
• Clean Water Act (CWA) Section 316(b) Annual Reports.
The permittee may seek an electronic reporting waiver from the Division (see "How to Request a
Waiver from Electronic Reporting" section below).
2. Electronic Submissions
In accordance with 40 CFR 122.41(1)(9), the permince must identify the initial recipient at the time of
each electronic submission. The Permittee should use EPA's website resources to identify the initial
recipient for the electronic submission.
Initial recipient of electronic NPDES information from NPDES-regulated facilities means the entity
(EPA or the state authorized by EPA to implement the NPDES program) that is the designated entity
for receiving electronic NPDES data [see 40 CFR 127.2(b)].
EPA plans to establish a website that will also link to the appropriate electronic reporting tool for each
type of electronic submission and for each state. Instructions on how to access and use the appropriate
electronic reporting tool will be available as well. Information on EPA's NPDES Electronic Reporting
Rule is found at: https://www.federalregister.gov/documents/2015/10/22/2015-24954/national-
pollutant-d ischarge-elimination-system-np des -electronic -reporting -rule
Electronic submissions must start by the dates listed in the "Reporting Requirements" section above.
3. How to Request a Waiver from Electronic Reportine
The Permittee may seek a temporary electronic reporting waiver from the Division. To obtain an
electronic reporting waiver, a permittee must first submit an electronic reporting waiver request to the
Division. Requests for temporary electronic reporting waivers 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 submitting monitoring data and reports. The duration of a temporary waiver
shall not exceed 5 years and shall thereupon expire. At such time, monitoring data and reports shall be
submitted electronically to the Division unless the Permittee re -applies for and is granted a new
temporary electronic reporting waiver by the Division. Approved electronic reporting waivers are not
transferrable. Only permittees with an approved reporting waiver request may submit monitoring data
Page 13 of 15

Dowsign Envelope ID: C9ACB2F8-FB2F4A2&978D-C3aAE8261DAA
Permit NC0025241
and reports on paper to the Division for the period that the approved reporting waiver request is
effective.
Information on eDMR and the application for a temporary electronic reporting waiver are found on the
following web page:
http://deq.nc.gov/about/divisions/water-resources/edmr
4. Sienatory Requirements [Supplements Section B. (11.) (b) and Supersedes Section B. (11.) (d)l
All eDMRs submitted to the permit issuing authority shall be signed by a person described in Part II,
Section B. (I 1.)(a) or by a duly authorized representative of that.person as described in Part II, Section
B. (1 l.)(b). A person, and not a position, must be delegated
,Signatory authority for eDMR reporting
purposes. /
6A
For eDMR submissions, the person signing and submitting th`e DMR must obtain an eDMR user
account and login credentials to access the eDMR•syst`em. For more information on North Carolina's
eDMR system, registering for eDMR and obtain ing,an eDMR user account, please visit the following
web page:
http://deq.nc.gov/about/
Certification. Any person submitting an electronic DMR'using the state's eDMR system shall make the
following certification [40 CFR 122.22].NO�OTHER STATE ITS OF CERTIFICATION WILL
BE ACCEPTED:
"I certify, under penalty of line, thatthis�document'and`all,atiachnients were prepared under my
i . i i' .
direction or supervrs:on in accordance with a, system desrg`d�o assure that qualified personnel
properly gather and \ valuate lhe,infonnation submitted. Based on my inquiry of the person or persons
who manage the system r those persons directly responsible for gathering the information, the
information -submitted is; to�the-best ofmy know}edge and belief, true, accurate, and complete. I am
aware,tha! therere are.signtfcant penalties jor•submrtting false information, including the possibility of
The perinitiee shall retain records of all -Discharge Monitoring Reports, including eDMR submissions.
These records or copies sha&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 122.4 1].
Page 14 of 15