NC0021024_Draft Permit (2nd)_20230816

DocuSign Envelope ID: 1353BB66-E86E-4C69-98F0-4D7107826E34
ROY COOPERa
Governor V - O
ELIZABETH S. BISER y z.�w a2
Secretary r�E�NOF,,.
RICHAM E. ROGERS, JR. NORTH CAROLINA
Director Environmental Quality
August 15, 2023
Mr. Kenneth Griffin, Public Services Director
City of Roxboro
P.O. Box 128
Roxboro, North Carolina 27573
Subject: 2"d Draft NPDES Permit NCO021024
Roxboro WWTP
Person County
Grade IV Biological WPCS
SIC Code 4952
Dear Mr. Griffin:
Enclosed with this letter is a copy of the second draft NPDES permit renewal for your facility.
This draft is being sent for review and public comment in light of reduction of effluent
Conductivity monitoring and removal of the annual Mercury limit, each representing a relaxation
of requirements. Please review this draft carefully to ensure a thorough understanding of the
requirements and conditions it contains. There are several changes from the existing permit,
including the following:
The following changes were made to the first draft permit sent to you on May 22, 2023:
• 1.5 sludge drying beds was added to the facility components list (see Supplement to Cover
Sheet).
• Effluent Conductivity monitoring was reduced from daily to weekly to better match
instream conductivity monitoring.
• A footnote was added to the Effluent Requirements sheet notifying that the Permittee may
request the Division to re-evaluate Total Copper requirements after 24 months of sampling
[See A. (1.), footnote 8].
• Based on re-evaluation of facility Mercury data representing the previous 4.5 years (i.e.,
since November 2018), the annual limit for Mercury and monitoring requirements have
been removed.
For more information regarding decisions made to comments received, please see the attached
Fact Sheet Addendum.
This second draft maintains the following significant changes identified in the letter sent on
May 22, 2023:
• The facility components list has been modified to reflect changes made and are being made
during the facility's upgrade (see Supplement to Cover Sheet).
• As the effective date for the final Ammonia limits has passed, the interim Ammonia limits
have been removed from the permit [See A. (1.)].
D E Q �/ North Carolina Department of Environmental Quality I Division of Water Resources
v 512 North Salisbury Street 1 1611 Mail Service Center I Raleigh, North Carolina 27699-1611
NORTH nt of Em no 919.707.9000
Department M Envlronman�al Duali�

DocuSign Envelope ID: 1353BB66-E86E-4C69-98F0-4D7107826E34
Based on the facility's receiving industrial wastewater, Conductivity monitoring has been
added to the permit [See A. (L)].
• Based on the reasonable potential analysis (RPA) showing reasonable potential to violate
state water quality standards using updated effluent hardness data, Total Copper limits have
been revised [See A. (1.)].
Based on the RPA showing no reasonable potential to violate state water quality standards,
the monitoring requirement for Total Nickel and Total Zinc have been removed from the
permit [See A. (1.)].
• Based on NPDES guidance regarding the reduction of monitoring frequencies in NPDES
permits for exceptionally performing facilities, monitoring requirements for BOD5, TSS,
Ammonia and Fecal Coliform have been maintained at twice per week [See A. (1.)].
Based on review of effluent data and the facility's pretreatment program, Oil & Grease
limits and monitoring requirements have been removed from the permit [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. (4.) Mercury
Minimization Plan has been reworded toward its maintenance.
• 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 final wastewater method in 40 CFR136
method published in the Federal Register [See Special Condition A. (5.) PFAS Monitoring
Requirements].
• Some of the wording has changed in Special Condition A. (2.), Chronic Toxicity Permit
Limit, please review each paragraph carefully.
• Special Condition A. (3.) has been modified to include the specific three years in which
the Effluent Pollutant Scan shall be performed (2025, 2026, and 2027).
• 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.
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. (6.)].
The NPDES standard conditions (Parts II, 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
https://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 Person 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.
D E Q�� North Carolina Department of Environmental Quality I Division of Water Resources
512 North Salisbury Street 1 1611 Mail Service Center I Raleigh, North Carolina 27699-1611
NORTH CAROLINA 919.707.9000
Depanmem of Envlmnmenml Dual

DocuSign Envelope ID: 1353BB66-E86E-4C69-98F0-4D7107826E34
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,
DocuSigned1by:
�.•-1'^
N IMI[A N
9FBBBC952DF8455...
Gary Perlmutter, Environmental Specialist II
NPDES Municipal Permitting Unit
Hardcopy: NPDES Files
e-Copy: US EPA Region 4
DWR / Raleigh Regional Office / Water Quality / Scott Vinson, Vanessa Manuel
DWR / Operator Certification Program / Maureen Kinney
DWR / Aquatic Toxicology Branch / Cindy Moore & Molly Nicholson
DWR / Municipal Permitting Unit / Keyes McGee
City of Roxboro / Derek Clayton (ORC)
Virginia DEQ / Mark Bushing ([e-mail])
D E Q�� North Carolina Department of Environmental Quality I Division of Water Resources
512 North Salisbury Street 1 1611 Mail Service Center I Raleigh, North Carolina 27699-1611
NORTH CAROLINA 919.707.9000
Depanmem of Envlmnmenml Dual

DocuSign Envelope ID: 1353BB66-E86E-4C69-98F0-4D7107826E34
Roxboro WWTP Fact Sheet Addendum NCO021024
Comments to the draft permit NC0021024, which was public noticed for 30-day comment period on
5/25/2023, were provided by the City of Roxboro with several requests. No comments were received from
any other party. Individual comments by the City and Division responses (in blue) are provided below.
1. Change in Permittee Contact
a. Mr. Kenneth Griffin is the new City Public Services Director. Response: requires
completion of Permit Name/Ownership form, received on 8/15/2023; updated contact
noted; will address in future letters.
2. Supplement to Permit Cover Sheet (page 2 of 11)
a. Add 1.5 sludge drying beds (sludge dewatering facility utilized one of these beds and the
two new aerobic digestors used % of the other). Response: added as requested.
3. PFAS Monitoring
a. The City requests to be notified when the USEPA publishes 40 CFR part 136 Final PFAS
Method for wastewater in the Federal Register in order to meet delayed monitoring
requirement. Response: comment noted.
4. Conductivity
a. The City requests reduction of monitoring frequency to weekly based on slight increase
in downstream concentrations Response: monitoring frequency reduced to weekly as
requested to better match instream monitoring frequency.
5. Ammonia
a. The City requests to reinstate and extend the compliance schedule through March 2024.
Response: Ammonia data were evaluated from 12/1/2022, when the compliance
schedule ended, through May 2023 and found no exceedences of either the monthly
average or weekly average limits, demonstrating compliance (see figure below).
Effluent Ammonia
W k Avg ■ Mo Avg WA Limit — — MA Limit
6.0
5.0
4.0
J
n� 3.0 -
2.0
1.0 ■00 7 —
■
0.0
61�'
IN
Based on this review, extension of the compliance schedule is not needed and will not be
reinstated.
b. The City objects to the proposed Ammonia limits and propose alternate limits be
developed based on EPA's 2013 criteria with stream -specific pH and temperature data,
set at the upper 75th percentile values. Response: a recalculation was made for site -
specific ammonia limit development using available effluent and upstream data and

DocuSign Envelope ID: 1353BB66-E86E-4C69-98F0-4D7107826E34
Roxboro WWTP
Fact Sheet Addendum
NCO021024
applying default values where data are not available. Available data were obtained from
submitted DMRs from August 2018 — February 2023. For those parameters where data
are available, the 90th percentile was used, following recommendations in the EPA
Technical Support Document (EPA 1991, page 18) to provide adequate protection against
chronic toxicity stream impacts. The resulting inputs are as follows:
Parameter Summer Winter
Effluent Temperature, °C (90th percentile) 25.2 16.6
Effluent pH, SU (90th percentile) 7.3 7.1
Upstream Temperature, °C (90th percentile) 24.07 13.7
Upstream pH, SU (default) 6.8 7.5
Upstream Ammonia, mg/L (default) 1.16 2.25
Calculating these inputs with the facility design flow of 5.0 MGD and the receiving stream
flows of 7Q10 = 0.0 cfs summer and winter, and applying a 2.5 X multiplier to the chronic
allowable concentration (i.e., monthly average) to obtain an acute allowable
concentration (i.e., weekly average) resulted in the following ammonia limits:
Monthly Average
Weekly Average
Summer
1.2
2.9
Winter
2.3
5.6
which are comparable to the current limits:
Monthly Average
Weekly Average
Summer
1.0
3.0
Winter
1.8
5.4
Furthermore, as stated in the response to Comment 5 above, the facility is consistently
meeting compliance with the current limits. Because the differences between the site -
specific and current limits are negligible and the facility's ability to comply with current
limits, no changes were made to the ammonia limits.
6. Copper
a. The City requests that the RPA be run using effluent data beginning 1/1/2021 as older
data resulted in the proposed limits. Response: Considering the data are valid and there
is a decrease in concentrations beginning 1/1/2022, a footnote will be added to the
permit effluent requirements sheet stating that the Permittee may request a re-
evaluation of copper limits after 24 months of sampling for potential monitoring
frequency from monthly to quarterly.
7. Mercury
a. The City requests removal of the annual limit as it is based on a single high value of 51.9
ng/L in 2018, which was previously determined to be an anomaly and thus considered
invalid. Response: The mercury datum in question is found to be over 4.5 yrs old. The
evaluation was rerun using data not older than 4.5 yrs (i.e., from 11/30/2018 to present),
resulting in no limits required. The limit identified in the draft fact sheet was not added
to the permit; therefore, no changes are made to the permit.

DocuSign Envelope ID: 1353BB66-E86E-4C69-98F0-4D7107826E34
Roxboro WWTP Fact Sheet Addendum NC0021024
8. Instream Monitoring
a. The City requests removal of instream monitoring for DO, Temperature and Conductivity.
Response: instream monitoring requirements for the above parameters are based on rule
15A NCAC 02B .0508, and thus will remain in the permit.
9. Chronic Toxicity
a. The City requests removal of Chronic Toxicity monitoring, based on all tests passing.
Response: chronic toxicity is a necessary screening tool of water quality, and is required
by rule 15A NCAC 02B .0508; it will remain in the permit.
Based on the removal of the Mercury annual limit, which represents a relaxion in permit requirements,
the permit will be sent to a second Public Notice, during which the Permittee may submit additional
comments.

DocuSign Envelope ID: 1353BB66-E86E-4C69-98F0-4D7107826E34
Permit NCO021024
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENTAL QUALITY
DIVISION OF WATER RESOURCES
PERMIT
TO DISCHARGE WASTEWATER UNDER THE
NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM
N( PDES)
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
City of Roxboro
is hereby authorized to discharge wastewater from a facility located at the
Roxboro Wastewater Treatment Plant
902 Cavel-Chub Road
Roxboro, NC
Person County
to receiving waters designated as the Marlowe Creek in the Roanoke River Basin in accordance with the
effluent limitations, monitoring requirements, and other applicable conditions set forth in Parts I, II, III, and
IV hereof.
I
IRM
This permit shall become effective Montrh dd, 20yy.
This permit and authorization to discharge shall expire at midnight on ................................. May 31, 2028.
Signed this day Month dd, 20yy.
DRAFT
for Richard E. Rogers, Jr., Director
Division of Water Resources
By Authority of the Environmental Management
Commission
Page 1 of 11

DocuSign Envelope ID: 1353BB66-E86E-4C69-98F0-4D7107826E34
Permit NCO021024
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.
City of Roxboro
is hereby authorized to:
1. Continue to operate and maintain the wastewater treatment works identified on the Cover, an existing
5.0 MGD facility consisting of the following components:
• One (1) septic tank unloading facility
• Two (2) bar screens
• Two (2) grit removal devices
• Two (2) aeration basins (3 MG each)
• Three (3) secondary clarifiers
• One (1) disinfection system (sodium hypochlorite) with two (2) contact chambers
• One (1) calcium thiosulfate dechlorination system
• Four (4) aerobic digesters
• Sludge dewatering facility
• 1.5 sludge drying beds (the sludge dewatering facility utilized one of these beds and the two new
aerobic digestors used'/2 of another)
2. Upon receipt of an Engineers Certificate of completion for an authorized system upgrade, operate the
above facility with the following component changes:
• One (1) new 2.4 MG multiple ring oxidation ditch, replacing the two (2) 3.0 MG aeration basins
above
• One (1) 3.0 MG EQ Basin and two (2) 1.3 MG EQ Basins, repurposed from the two aeration basins
above
3. Discharge from said treatment works at the location specified on the attached map via Outfall 001 into
the Marlowe Creek, classified C waters in the Roanoke River Basin and 03010104 HUC.
Page 2 of 11

DocuSign Envelope ID: 1353BB66-E86E-4C69-98FO-4D7107826E34
Permit NCO021024
PART
A.(L) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS
[15A NCAC 02B .0400 et seq., 15A NCACO2B .0500 et seq.]
Grade IV Biological Water Pollution Control System [15A NCAC 08G .0302]
(a.) During the period beginning on the effective date of the permit and lasting until expiration, the
Permittee is authorized to discharge treated municipal and industrial wastewater from Outfall 001.
Such discharges shall be limited and monitored' by the Permittee as specified below:
PARAMETER
Parameter Code
EFFLUENT LIMITS
MONITORING REQUIREMENTS
Monthly
Average
Weekly
Average
Daily
Maximum
Measurement
Frequency
Sample
Type
Sample
Location'
Flow 50050
5.0 MGD
Continuous
Recording
I or E
BOD, 5-day, 20°C 3 C0310
(Apr 1 - Oct 31)
16.0 mg/L
24.0 mg/L
2/week 4
Composite
I and E
BOD, 5-day, 200C 3
(Nov 1 - Mar 31) C0310
20.0 mg/L
30.0 mg/L
2/week a
Composite
I and E
Total Suspended Solids3 C0530
30.0 mg/L
45.0 mg/L
2/week4
Composite
I and E
NH3 as N C0610
(Apr 1 - Oct 31)
1.0 mg/L
3.0 mg/L
2/week 4
Composite
E
NH3 as N
(Nov 1 - Mar 31) C0610
1.8 mg/L
5.4 mg/L
2/week4
Composite
E
Fecal Coliform 31616
(geometric mean)
200/100 mL
400/100 mL
2/week4
Grab
E
Total Residual Chlorine 5 50060
1
17 µg/L
Daily
Grab
E
Dissolved Oxygen 00300
Daily Average > 5.0 mg/L
Daily
Grab
E
Temperature, °C 00010
Monitor and Report
Daily
Grab
E
pH 00400
Between 6.0 and 9.0 Standard Units
Daily
Grab
E
Conductivity, µmhos/cm 00094
Monitor and Report
Weekly
Grab
E
TKN, mg/L 00625
Monitor and Report
Monthly
Composite
E
NO3-N + NO2-N, mg/L 00630
Monitor and Report
Monthly
Composite
E
Total Nitrogen 6, mg/L C0600
Monitor and Report
Monthly
Calculated
E
Total Phosphorus, mg/L C0665
Monitor and Report
Monthly
Composite
E
Total Hardness (as CaCO3) 7, 00900
mg/L
Monitor and Report
Quarterly
Composite
E
Total Copper 8 01042
13.7 µg/L 19.2 µg/L
Monthly
Composite
E
PFAS, ng/L various
Footnote 9
Quarterly
Grab
E
Chronic Toxicity 10 TGP3B
Monitor and Report
Quarterly
Composite
E
Effluent Pollutant Scan NCO]
Monitor and Report
Footnote 11
Footnote 11
E
Dissolved Oxygen, mg/L 00300
Monitor and Report
Variable'
Grab
U and D
Temperature, °C 00010
Monitor and Report
Variable'
Grab
U and D
Conductivity, µmhos/cm 00094
Monitor and Report
Variable'
Grab
U and D
Footnotes:
The permittee shall submit Discharge Monitoring Reports electronically using NC DWR's eDMR application
system. See Special Condition A.(6.).
Sample locations: I = Influent; E = Effluent; U = Upstream at NC 1351 (Gavel Chub Lake Road); D = Downstream
at NC 1322 (Edwin Robertson Road). Upstream and downstream samples shall be grab samples collected 3/week
during June, July, August, and September and 1/week during the remainder of the year.
The monthly average effluent BOD5 and Total Suspended Solids concentrations shall not exceed 15% of the
respective influent value (85% removal).
Page 3 of 11

DocuSign Envelope ID: 1353BB66-E86E-4C69-98F0-4D7107826E34
Permit NCO021024
Footnotes (continued
4. Twice per week sampling must occur on any two non-consecutive days during the calendar week.
5. The Division shall consider all effluent total residual chlorine 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.
6. 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.
7. Effluent hardness sampling should be performed in conjunction with testing for hardness dependent metals (e.g.,
copper).
8. After a 24-month sampling period, the Permittee may request the Division to conduct a review of submitted data
for re -assessment of Total Copper monitoring from monthly to quarterly.
9. See Special Condition A.(5.).
10. Chronic Toxicity (Ceriodaphnia dubia) P/F at 90% with testing in March, June, September, and December. See
Special Condition A.(2.).
11. The Permittee shall perform three effluent pollution scans during the term of this permit. See Special Condition
A.(3.).
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, 15A NCAC 02B .0500 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 90%.
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 I1 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 electronically using the
Division's eDMR system for the months in which tests were performed, using the parameter code TGP3B
for the pass/fail results and THP313 for the Chronic Value. Additionally, DWR Form AT-3 (original) is to
be sent to the following address:
North Carolina Division of Water Resources
Water Sciences Section/Aquatic Toxicology Branch
1621 Mail Service Center
Raleigh, NC 27699-1621
Page 4 of 11

DocuSign Envelope ID: 1353BB66-E86E-4C69-98F0-4D7107826E34
Permit NC0021024
Or, results can be sent to the email, [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.
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 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.
Page 5 of 11

DocuSign Envelope ID: 1353BB66-E86E-4C69-98F0-4D7107826E34
Permit NCO021024
A.(3.) ADDITIONAL MONITORING REQUIREMENTS FOR PERMIT RENEWAL
[NCGS 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: 2025,
2026, and 2027. 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.(2.) 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
34546
Bis (2-chloroethyl) ether
34273
Chlorine (total residual, TRC)
50060
1, 1 -dichloroethylene
34501
Bis (2-chloroisopropyl) ether
34283
Dissolved oxygen
00300
1,2-dichloropropane
C0541
Bis (2-ethylhexyl) phthalate
C0100
Nitrate / Nitrite
00630
1,3-dichloropropylene
77163
4-bromophenyl phenyl ether
34636
Kjeldahl nitrogen
00625
Ethylbenzene
34371
Butyl benzyl phthalate
34292
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
Chrysene
34320
Hardness
00900
1,1,2,2-tetrachloroethane
81549
Di-n-butyl phthalate
39110
Antimony
01097
Tetrachloroethylene
34475
Di-n-octyl phthalate
34596
Arsenic
01002
Toluene
34010
Dibenzo(a,h)anthracene
34556
Beryllium
01012
1, 1, 1 -trichloroethane
34506
1,2-dichlorobenzene
34536
Cadmium
01027
1, 1,2-tri chloroethane
34511
1,3-dichlorobenzene
34566
Chromium
C0034
Trichloroethylene
39180
1,4-dichlorobenzene
34571
Copper
01042
Vinyl chloride
39175
3,3-dichlorobenzidine
34631
Lead
01051
Acid -extractable compounds:
Diethyl phthalate
34336
Mercury (Method 1631E)
COMER
P-chloro-m-cresol
34452
Dimethyl phthalate
34341
Nickel
01067
2-chlorophenol
34586
2,4-dinitrotoluene
34611
Selenium
01147
2,4-dichlorophenol
34601
2,6-dinitrotoluene
C0626
Silver
01077
2,4-dimethylphenol
34606
1,2-diphenylhydrazine
34346
Thallium
01059
4,6-dinitro-o-cresol
34657
Fluoranthene
C0376
Zinc
01092
2,4-dinitrophenol
34616
Fluorene
34381
Cyanide
00720
2-nitrophenol
34591
Hexachlorobenzene
C0700
Total phenolic compounds
32730
4-nitrophenol
34646
Hexachlorobutadiene
C0702
Volatile organic compounds:
Pentachlorophenol
39032
Hexachlorocyclo-pentadiene
34386
Acrolein
34210
Phenol
34694
Hexachloroethane
34396
Acrylonitrile
34215
2,4,6-trichlorophenol
34621
Indeno(1,2,3-cd)pyrene
34403
Benzene
34030
Base -neutral compounds:
Isophorone
34408
Bromoform
32104
Acenaphthene
34205
Naphthalene
34696
Carbon tetrachloride
32102
Acenaphthylene
34200
Nitrobenzene
34447
Chlorobenzene
34301
Anthracene
CO220
N-nitrosodi-n-propylamine
34428
Chlorodibromomethane
34306
Benzidine
39120
N-nitrosodimethylamine
34438
Chloroethane
85811
Benzo(a)anthracene
C0526
N-nitrosodiphenylamine
34433
2-chloroethyl vinyl ether
34576
Benzo(a)pyrene
34247
Phenanthrene
34461
Chloroform
32106
3,4 benzofluoranthene
34230
Pyrene
34469
Dichlorobromomethane
32101
Benzo(ghi)perylene
34521
1,2,4-trichlorobenzene
C0551
1, 1 -dichloroethane
34496
Benzo(k)fluoranthene
34242
1,2-dichloroethane
32103
Bis (2-chloroethoxy) methane
34278
Page 6 of 11

DocuSign Envelope ID: 1353BB66-E86E-4C69-98F0-4D7107826E34
Permit NC0021024
(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 1 - 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://edocs.deq.ne.gov/Forms/NPDES_WW-EDMR-
Supplemental-Form
(c.) 2"d-Species Toxicity Testing and Reporting.
(i.) In addition to the quarterly toxicity tests required in Condition A. (2.) 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.
(ii.) 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
Condition A. (2.) 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.
(iii.) 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].
(iv.) 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 7 of 11

DocuSign Envelope ID: 1353BB66-E86E-4C69-98F0-4D7107826E34
Permit NCO021024
A. (4.) MERCURY MINIMIZATION PLAN (MMP) [NCGS 143-215.1 (b)]
The Permittee shall maintain and continue to implement the Mercury Minimization Plan (MMP) developed
in the previous permit term. The MMP shall continue to be available for inspection on -site. 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 MMP 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.
A. (5.) PFAS MONITORING REQUIREMENT [NCGS 143-215.1(b)]
This reporting requirement for the per- and polyfluoroalkyl substances (PFAS) parameters listed under
Table 1 of the Final Method 1633 takes effect the first full calendar quarter following six (6) months after
EPA publishes a 40 CFR part 136 Final PFAS Method for wastewater in the Federal Register. Monitoring
will be at a quarterly frequency.
Find the current parameters listed under Table 1 of the 3rd Draft Method 1633 Analysis of Per- and
Polyfluoroalkyl Substances (PFAS) in Aqueous, Solid, Biosolids, and Tissue Samples by LC-MS/MS at:
https://www.epa.gov/system/files/documents/2022-
12/3rd%20Draft%20Method%201633%20December%202022%2012-20-22 508.pdf
A.(6.) ELECTRONIC REPORTING - DISCHARGE MONITORING REPORTS
[NCGS 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 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 Requirements [Supersedes Section D. (2.) and Section E. (5.) (a)1
The permittee shall report 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 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.nc.gov/about/divisions/water-resources/edmr.
Page 8 of 11

DocuSign Envelope ID: 1353BB66-E86E-4C69-98F0-4D7107826E34
Permit NC0021024
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:
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 Permittee must identify the initial recipient at the time of
each electronic submission. The permittee should use the EPXs 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 EPXs NPDES Electronic Reporting
Rule is found at: https://www.federalregister.gov/documents/2015/10/22/2015-24954/national-
pollutant-discharge-elimination-system-npdes-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 Reporting
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
Page 9 of 11

DocuSign Envelope ID: 1353BB66-E86E-4C69-98F0-4D7107826E34
Permit NC0021024
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
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. 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. (I 1.)(a) or by a duly authorized representative of that person as described in Part II, Section
B. (I1.)(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://deq.nc.gov/about/divisions/water-resources/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:
"I cert� 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. "
5. Records Retention [Supplements Section D. (6.)]
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 ].
Page 10 of 11

DocuSign Envelope ID: 1353BB66-E86E-4C69-98F0-4D7107826E34
Permit NCO021024
coR
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City of Roxboro
Facility
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Location
Latitude: 36' 26 41" N State Grid/Quad: B 23 -\ZV / Roxboro
not to scale
Loo¢itude: 78' 58' 47" R' Permitted Flmr-: 5.013GD
Receis-ioe Stream: \Iarlon-e Creek Drain age Basin: Roanoke River Basin
Stream Class: C 8-DizitIICC: 03010104
]�J NPDES
North orth
Permit NCO021024
Person County
Page 11 of 11