NC0079057_Draft Permit_20231220

DocuSign Envelope ID: E5FFOB90-661D-4908-AECB-67C67C337E25
ROY COOPER
Governor
ELIZABETH S. BISER
Secretary
RICHARD E. ROGERS, JR.
Director
Joshua O'Brien, Director
Town of Manteo
PO Box 246
Manteo, NC 27954-0246
Dear Mr. O'Brien:
NORTH
LINA
Qwaft
December 20, 2023
Subject: Draft NPDES Permit Renewal
Permit NCO079057
Manteo WWTP
Dare County
Grade III Biological WPCS
SIC Code 4952
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 has been revised based on the submitted Process
Narrative and plant flow diagram (See Supplement to Permit Cover Sheet).
• Based on NPDES guidance regarding the reduction of monitoring frequencies in NPDES
permits for exceptionally performing facilities, monitoring requirements for BOD5, Total
Suspended Solids and Enterococci have been maintained at 2/week at 0.6 MGD [See A.
(I.)]. In addition, based on 15A NCAC 02B, .0508, monitoring frequencies for the above
parameters at 1.0 MGD expansion flow have been adjusted to 3/week with a footnote that
the Permittee may request reduction of monitoring frequency if no exceedances have been
reported within six (6) months after expansion [See A. (2.), Footnote 3].
• Based on calculations of site -specific limits for Ammonia in salt waters, Ammonia limits
have been adjusted at both flow tiers. In addition, in accordance with 15A NCAC 02B,
.0508, monitoring for Ammonia has been adjusted to 1/week at both flow tiers [See A. (1.)
and A. (2.)].
• To better identify nitrogen in the effluent, monthly monitoring for NO2+NO3 have been
added to the permit at both the 0.6 and 1.0 MGD flow tiers [See A. (1.) and A. (2.)].
• Based on the reasonable potential analysis (RPA) showing no reasonable potential to
violate state water quality standards, monitoring requirements for Bromoform have been
removed from the permit at both flow tiers [See A. (L) and A. (2.)].
• Based on the reasonable potential analysis (RPA) showing reasonable potential to violate
state water quality standards in High Quality Waters, limits for Total Copper and
Dibromochloromethane have been revised at both flow tiers [See A. (L) and A. (2.)]. In
D E 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
j:a!aor::f
����,F 919.707.9000

DocuSign Envelope ID: E5FFOB90-661 D-4908-AECB-67C67C337E25
addition, limits and monthly monitoring for Total Zinc and Bis(2-ehylhexyl) phthalate have
been added to the permit.
• Based on the RPA predicting a maximum effluent nickel concentration that is greater than
half of the allowable discharge concentration based on state water quality standards,
quarterly monitoring for Total Nickel has been added to the permit at both flow tiers [See
A. (L) and A. (2.)].
• The instream monitoring requirements have been removed from Sections A. (L) and A.
(2.) and placed as a separate condition [See A. (1)].
• Based on the Division of Marine Fisheries prohibiting Shallowbag Bay from shellfish
growing within Shellfish Growing Area H-1 due to fecal coliform concerns, effluent and
instream monitoring, the latter at all five (5) locations, for Fecal Coliform has been added
to the permit at a weekly frequency [See A. (1)].
• Because their limit effective dates have passed, the compliance schedule for Total Copper
and Dibromochloromethane has been removed from the permit.
• To provide an opportunity for the Town to develop a plan to assess sources of total copper
total zinc, dibromochloromethane and bis(2-ethylhexyl) phalate in order to come into
compliance with the limits in Section A. (L), a 5-year compliance schedule has been added
to the permit with an option to conduct a dilution study to produce a dilution factor for use
in site -specific limit development [See Special Condition A. (6.)].
• A special condition to monitor effluent PFAS chemicals 2/year has been added to the
permit, to be effective six (6) months after EPA has a final wastewater method in 40 CFR
136 method published in the Federal Register [See Special Condition A. (7.) PFAS
Monitoring Requirements].
• Some of the wording has changed in Special Condition A. (3.) Acute Toxicity Pass/Fail
Permit Limit; please review each paragraph carefully.
• Some of the wording has changed in Special Condition A. (4.), formerly A. (5.) Effluent
Pollutant Scan; please review each paragraph carefully.
• 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 [See A. (6.)].
• 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 map has been revised to show instream monitoring locations.
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 Dare County area, soliciting public comments on this draft permit. Please
provide any written comments you may have to the following: NCDEQ/DWR, NPDES Permitting
North Carolina Departinent of Enviromnental Quality I Division of Water Resources
E Q�� 512 North Salisbury Street 1 1611 Mail Service Center I Raleigh, North Carolina 27699-1611
H _
AowN� /✓ 919.707.9000

DocuSign Envelope ID: E5FFOB90-661D-4908-AECB-67C67C337E25
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,
Et70cu81pned by:
pu'(N"�
9C952DF8455...
Gary Perlmutter, Environmental Specialist II
NPDES Municipal Permitting Unit
Hardcopy: NPDES Files
eCopy: US EPA Region 4
DWR / Washington Regional Office / Water Quality / David May
DWR / Operator Certification Program / Jeff Talbot
DWR / Aquatic Toxicology Branch / Cindy Moore & Molly Nicholson
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
NONIt-UWVi uJA _
919.707.9000

DocuSign Envelope ID: E5FFOB90-661D-4908-AECB-67C67C337E25
NCO079057
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENTAL QUALITY
DIVISION OF WATER RESOURCES
PERMIT
TO DISCHARGE WASTEWATER UNDER THE
NATIONAL POLLUTANT DISCHARGE ELIIVMATION SYSTEM
Nf 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
Town of Manteo
is hereby authorized to discharge wastewater from a facility located at the
Manteo Wastewater Treatment Plant
710 Bowerstown Road
Manteo
Dare County
to receiving waters designated as the Shallowbag Bay in the Pasquotank 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............ mmm dd, 20yy.
This permit and authorization to discharge shall expire at midnight on December 31, 2028.
Signed this day ................... mmm dd, 20yy.
DRAFT
Michael J. Montebello, NPDES Permitting Branch Chief
Division of Water Resources
By Authority of the Environmental Management Commission
Page 1 of 15

DocuSign Envelope ID: E5FFOB90-661 D-4908-AECB-67C67C337E25
NCO079057
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 issuedpermit 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 Manteo
is hereby authorized to:
Continue to operate and maintain the wastewater treatment works identified on the Cover, an existing 0.6
MGD facility consisting of the following components:
• Micro -strainer
• Grit chamber
• Oxidation ditch
• Two (2) final clarifiers
• Two (2) tertiary filters
• Chlorine (sodium hypoc
• Dechlorination (sodium
• Post aeration
• Force main to outfall
• Aerobic sludge digester
• Sludge holding lagoon
2. After receiving an Authorization to Construct (AtC) from the Division, completing construction, and
submitting an Engineer's Certification, operate a 1.0 MGD wastewater treatment facility.
Discharge from said treatment works at the location specified on the attached map via Outfall 001 into
Shallowbag Bay, classified SC waters in the Pasquotank River Basin and 03010205 RUC.
Page 2 of 15

DocuSign Envelope ID: E5FFOB90-661D-4908-AECB-67C67C337E25
NCO079057
PART I - MONITORING, CONTROLS, AND LIMITATIONS FOR PERMITTED DISCHARGES
A.(1.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS [0.6 MGD]
[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 expansion to 1.0 MGD or
permit expiration, whichever is sooner, the Permittee is authorized to discharge treated municipal
wastewater from Outfall 001. Such discharges shall be limited and monitored l 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
0.6 MGD
Continuous
RecordingInfluent
or
Effluent
BOD, 5-day, 20°C 2 (Apr I - Oct 31) C0310
5.0 mg/L
7.5 mg/L
2/week'
Composite
Influent &
Effluent
BOD, 5-day, 20°C 2 (Nov I - Mar 31) C0310
10.0 mg/L
15.0 mg/I.
2/week'
Composite
Influent &
Effluent
Total Suspended Solids (TSS) 2 C0530
30.0 mg/L
45.0 mg/L
2/week'
Composite
Influent Effluent
Ammonia (NH;-N) (Apr I - Oct 31) C0610
1.4 mg/L
3.4 mg/L
Weekly
Composite
Effluent
Ammonia (NH3-N) (Nov I - Mar 31) C0610
2.5 mg/L
6.2 mg/L
Weekly
Composite
Effluent
Enterococci (geometric mean) 61211
35/100 mL
264/100 mL
2/week'
Grab
Effluent
Fecal Coliform 31616
Monitor and Report
Weekly
Grab
Effluent
Dissolved Oxygen (DO) 00300
Daily Average >_ 6.0 mg/L
Daily
Grab
Effluent
pH 00400
Between 6.8 and 8.5 Standard Units
Daily
Grab
Effluent
Temperature (°C) 00010
Monitor and Report
Daily
Grab
Effluent
Total Residual Chlorine (TRC) 4 50060
1 1 13 µg/L
3/week
Grab
Effluent
Total Nitrogen 3 (mg/L) C0600
Monitor and Report
Weekly
Calculated
Effluent
TKN (mg/L) 00625
Monitor and Report
Weekly
Composite
Effluent
NO3-N+NO2-N (mg/L) 00630
Monitor and Report
Weekly
Composite
Effluent
Total Phosphorus (mg/L) C0665
Monitor and Report
Weekly
Composite
Effluent
Total Copper interim limit 6,7 01042
3.7 µg/L
5.8 µg/L
Monthly
Composite
Effluent
Total Copper final limit 6. 7 01042
1.8 µg/L
2.9 µg/L
Monthly
Composite
Effluent
Total Nickel 6 (µg/L) 01067
Monitor and Report
Quarterly
Composite
Effluent
Total Zinc interim 6-' 01042
Monitor and Report
Monthly
Composite
Effluent
Total Zinc final limit 6, 7 01042
42.8 µg/L
47.6 µg/L
Monthly
Composite
Effluent
Dibromochloromethane
interim limit6, 32105
..
210 µg/
210µg/L
Monthly
Composite
Effluent
Dibromochloromethane 32105
final limit 6,
10.5 µ�
10.5 µg/L
Monthly
Composite
Effluent
Bromodichloromethane 32101
(=Dichlorobromomethane)
Monitor and Report
Monthly
Composite
Effluent
Bis rim 6,ylhexyl) phthalate
interim 39100
Monitor and Report
Monthly
Composite
Effluent
Bis 6hexyl) phthalate
finallimit 39100
limit
0.2 µg/L
0.2 µg/L
Monthly
Composite
Effluent
Total Mercury S (ng/L) COMER
Monitor and Report
1/five years
Grab
Effluent
PFAS various
Monitor and Report
2/year'
Grab
Effluent
Acute Toxicity 10 TGE6C
Monitor and Report
Quarterly
Composite
Effluent
Footnotes on next page.
Page 3 of 15

DocuSign Envelope ID: E5FFOB90-661 D-4908-AECB-67C67C337E25
NCO079057
Footnotes from A. (1.):
1. The Permittee shall submit Discharge Monitoring Reports electronically using NC DWR's eDMR application system.
See Special Condition A. (8.).
2. The monthly average effluent BOD5 and TSS concentrations shall not exceed 15% of the respective influent value (85%
removal).
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 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.
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. Metals monitoring shall coincide with acute toxicity monitoring. Metals sampling shall be reported to the lowest
available target PQL identified by the Division's laboratory or the lower reporting level of the procedure.
7. The Permittee shall achieve compliance with these limitations within five years of the effective date of this permit and
shall follow the Total Copper, Total Zinc, Dibromochloromethane and Bis(2-ethylhexyl) phthalate compliance schedule
detailed in Special Condition A. (6.).
8. Mercury samples shall be analyzed using EPA Method 1631 E.
9. See Special Condition A. (7.).
10. Acute Toxicity (Fathead Minnow) Pass/Fail at 90% effluerrtvith testing in February, May, August, and November. See
Special Condition A. (4.).
(b.) There shall be no discharge of floating solids or visible foam in other than trace amounts.
Page 4 of 15

DocuSign Envelope ID: E5FFOB90-661D-4908-AECB-67C67C337E25
NCO079057
A.(2.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS [1.0 MGD]
[I SA 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 upon expansion to 1.0 MGD and lasting until permit expiration, the Permittee
is authorized to discharge treated municipal wastewater from Outfall 001. Such discharges shall be limited
and monitored t 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
1.0 MGD
Continuous
Recording
Influent or
Effluent
BOD, 5-day, 20°CZ (Apr 1 - Oct 31) CO310
5.0 mg/L
7.5 mg/1-
3/week3
Composite
Influent &
Effluent
BOD, 5-day, 20°C 2 (Nov 1 - Mar CO310
31)
10.0 mg/L
15.0 mg/L
3/week 3
Composite
Influent &
Effluent
Total Suspended Solids (TSS) 2 CO530
30.0 mg/L
45.0 mg/L
3/week'
Composite
Influent &
Effluent
Ammonia (NH3-N) (Apr I - Oct 31) CO610
1.4 mg/L
1 3.4 mg/L
I
Weekly
Composite
Effluent
Ammonia (NH3-N) (Nov I -Mar 31) CO610
2.5 mg/l,
6.2 mg/L
Weekly
Composite
Effluent
Enterococci (geometric mean) 61211
35/100 mL
264/100 mL
3/week'
Grab
Effluent
Feal Coliform 31616
Monitor and Report
Weekly
Grab
Effluent
Dissolved Oxygen (DO) 00300
Daily Average > 6.0 mg/L
Daily
Grab
Effluent
pH 00400
Between 6.8 and 8.5 Standard Units
Daily
Grab
Effluent
Temperature (°C) 00010
Monitor and Report
Daily
Grab
Effluent
Total Residual Chlorine (TRC) ° d 50060
13 µg/L
3/week
Grab
Effluent
Total Nitrogen s (mg/L) CO600
Monitor and Report
Weekly
Calculated
Effluent
TKN (mg/L) 00625
Monitor and Report
Weekly
Composite
Effluent
NO3-N + NO2-N (mg/L) 00630
Monitor and Report
Weekly
Composite
Effluent
Total Phosphorus (mg/L) CO665
Monitor and Report
Weekly
Composite
Effluent
Total Copper 6 J 01041
1.8 µg/L 1 1 2.9 µg/L
Monthly
Composite
Effluent
Total Nickel 6 (µg/L) 01067
Monitor and Report
Quarterly
Composite
Effluent
Total Zinc 6 01042
42.6 µg/L
47.6 µg/L
Monthly
Composite
Effluent
Dibromochloromethane 32105
10.5 µg/L
10.5 µg/L
Monthly
Composite
Effluent
Bromodichloromethane 32101
(=Dichlorobromomethane)
`Monitor and Report
Monthly
Composite
Effluent
Bis (2-ethylhexyl) phthalate 39100
0.2 µg/L 0.2 µg/L
Monthly
Composite
Effluent
Total Mercury' (ng/L) COMER
Monitor and Report
1/five years
Grab
Effluent
PFAS various
Monitor and Report
2/year a
Grab
Effluent
Acute Toxicity9 TGE6C
Monitor and Report
Quarterly
Composite
Effluent
Effluent Pollutant Scan 10 NCO
Monitor and Report
Footnote 10
Footnote 10
Effluent
Footnotes on the next page.
Page 5 of 15

DocuSign Envelope ID: E5FFOB90-661 D-4908-AECB-67C67C337E25
NCO079057
Footnotes from A. (2.):
1. The Permittee shall submit Discharge Monitoring Reports electronically using NC DWR's eDMR application system.
See Special Condition A. (8.).
2. The monthly average effluent BOD5 and TSS concentrations shall not exceed 15% of the respective influent value (85%
removal).
3. The Permittee may request reduced monitoring if no exceedences have occurred within 6 months after expansion.
4. The facility shall monitor TRC when using chlorination for disinfection. 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.
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. Metals monitoring shall coincide with acute toxicity monitoring. Metals sampling shall be reported to the lowest
available target PQL identified by the Division's laboratory or the lower reporting level of the procedure.
7. Mercury samples shall be analyzed using EPA Method 1631E.
8. See Special Condition A.(7.).
9. Acute Toxicity (Fathead Minnow) Pass/Fail at 90% effluent with testing in February, May, August, and November. See
Special Condition A.(4.).
10. The Permittee shall perform effluent pollution scans during the first three years after expansion to 1.0 MGD. See Special
Condition A.(5.).
(b.) There shall be no discharge of floating solids or visible foam in other than trace amounts.
A.(3.) INSTREAM MONITORING REQUIREMENTS [15A NCAC 02B .0200 et seq.]
Beginning on the effective date of this permit and lasting until the expiration date, the Permittee shall perform
instream sampling upstream and downstream of Outfall 001 as specified below:
PARAMETER
Parameter Code
SAMPLE
TYPE'
MONITORING
FREQUENCY
SAMPLE
LOCATION
Temperature (°C)
2MO10
Grab
Weekly
Footnote 2
Dissolved Oxygen (DO) (mg/L)
1M300
Grab
Weekly
Footnote 2
Salinity (%o)
2M480
Grab
Weekly
Footnote 2
pH (SU)
2M400
Grab
Weekly
Footnote 2
Fecal Coliform (#/100mL)
61211
Grab'
Weekly
Footnote 2
Footnotes:
1. All instream monitoring samples shall be instantaneous samples at one -foot intervals vertically throughout the water
column.
2. Instream sampling locations are as follows: 1) at the mouth of Douglas Creek, 2) near the mouth of Scarboro Creek, 3)
in Shallowbag Bay approximately 800 feet northeast of Sandy Point, 4) in Shallowbag Bay approximately 0.4 miles
southeast of Ballast Point, and 5) in Roanoke sound approximately 200 feet outside of Shallowbag Bay.
3. Fecal Coliform samples shall be grab at the surface.
Page 6 of 15

DocuSign Envelope ID: E5FFOB90-661D-4908-AECB-67C67C337E25
NCO079057
A.(4.) ACUTE TOXICITY PASS/FAIL PERMIT LIMIT (QUARTERLY)
[15A NCAC 02B .0200, .0500 et seq]
The Permittee shall conduct acute toxicity tests on a quarterly basis using protocols defined in the North Carolina
Procedure Document entitled "Pass/Fail Methodology for Determining Acute Toxicity In A Single Effluent
Concentration" (Revised -December 2010, or subsequent versions). The monitoring shall be performed as a
Fathead Minnow (Pimephales promelas) 24-hour static test. The effluent concentration at which there may be at
no time significant acute mortality is 90% (defined as treatment two in the procedure document). The tests will
be performed during the months of February, May, August, and November. 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.
Should any single quarterly monitoring indicate a failure to meet specified limits, then monthly monitoring
will begin immediately until such time that a single test is passed. Upon passing, this monthly test
requirement will revert to quarterly in the months specified above.
All toxicity testing results required as part of this permit condition will be entered electronically using the
Division's eDMR system for the month in which it was performed, using the parameter code TGE6C.
Additionally, DWR Form AT-2 (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
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 any month, 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, then monthly
monitoring will begin immediately. Upon submission of a valid test, this monthly test requirement will revert to
quarterly in the months specified above.
Should any test data from either these monitoring requirements 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.
Page 7 of 15

DocuSign Envelope ID: E5FFOB90-661 D-4908-AECB-67C67C337E25
NCO079057
NOTE: Failure to achieve test conditions as specified in the cited document, such as minimum control organism
survival 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.
0
Page 8 of 15

DocuSign Envelope ID: E5FFOB90-661 D-4908-AECB-67C67C337E25
NCO079057
A.(5.) ADDITIONAL MONITORING REQUIREMENTS FOR PERMIT RENEWAL (only upon
expansion to 1.0 MGD) [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 first three years after expansion to 1.0
MGD. 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.) ACUTE
TOXICITY PASS/FAIL 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-chloronaphdWene
34581
Phosphorus
C0665
Methyl chloride i
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 t
34010
Dibenzo(a h)anthracene
34556
Beryllium
01012
1, 1, 1 -trichloroethane
34506
1,2-dichlorobenzene
34536
Cadmium
01027
1,1,2-trichloroethane
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 comwounds:
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
Thalli
01059
4,6-dinitro-o-cresol
34657
Fluoranthenc
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 orranie comwounds:
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 eomnounds:
Isophorone
34408
Bromofonn
32109
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 9 of 15

DocuSign Envelope ID: E5FFOB90-661D-4908-AECB-67C67C337E25
NC0079057
(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 "I" 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.) 2nd-Species Toxicity Testing and Reporting.
(i.) In addition to the quarterly toxicity tests required in Condition A.(3.) Acute Toxicity Pass/Fail 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 2nd 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 Acute
Toxicity Pass/Fail 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 2nd 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 2nd 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 10 of 15

DocuSign Envelope ID: E5FFOB90-661D-4908-AECB-67C67C337E25
NCO079057
A.(6.) SCHEDULE OF COMPLIANCE FOR TOTAL COPPER, TOTAL ZINC,
DIBROMOCHLOROMETHANE, AND BIS(2-ETHYLHEXYL) PHTHALATE LIMITS (5-YR)
[NCGS 143-215.5 (b)]
This compliance schedule includes the option for pursuing a dilution study for developing site -specific limitations
and compliance with the limits for Total Copper, Total Zinc, Dibromochloromethane and Bis(2-ethylhexyl)
phthalate.
(a.) If the Permittee wishes to pursue a dilution study to develop site -specific limitations for the above
pollutants, then within six (6) months of the permit effective date, the Permittee shall submit to the Division
of Water Resources a dilution study plan for approval. The Plan shall include a proposed modeling approach
and justification for the use of the selected model (CORMIX or equivalent), a proposed sampling protocol,
and a timeline for completion of the study.
(i.) Within eighteen (18) months of the dilution study plan approval by the Division, the Permittee shall
submit to the Division a report summarizing the results of the dilution study.
(A) A final model report shall be submitted to the Division within 90 days of completion of the
study. The report shall include a summary of all data collected, model assumptions, model
setup, model input and model results. If the dilution study results in site -specific limits for the
Total Copper, Total Zinc, Dibromochloromethane, and Bis(2-ethylhexyl) phthalate that the
Permittee wishes to have in the perm it, the Permittee shall submit to the Division a major permit
modification request to include the dilution factor -derived limits.
(B) The dilution factor determined by the CORMIX model (or equivalent) will be used by the
Division to develop site -specific limits for the above pollutants as well as for the chronic
effluent test concentration once the model is reviewed and approved by the Division.
(ii.) The final Total Copper, Total Zinc, Dibromochloromethane, and Bis(2-ethylhexyl) phthalate limits
based on dilution factor -derived limits, if approved, will be placed into effect upon the major permit
modification effective date and all remaining schedule items will be removed.
(b.) If the Permittee does not submit a dilution study plan within six (6) months of the permit effective date,
then the Permittee shall follow the Compliance Schedule outlined below (replacing the schedule in section
A.6.a. above) and substitute the dates for one through five years from the permit effective date:
(i.) Within one (1) year of the permit effective date, the Permittee shall submit to the Division a
Corrective Action Plan (CAP) for Division approval, summarizing the strategy or actions to be taken
to achieve compliance with the Total Copper, Total Zinc, Dichromobromomethane and Bis(2-
ethylhexyl) phthalate limitations listed in Section A. (1.). This plan will include specific dates for
completion or implementation of each action.
(ii.) Within two (2) years of the permit effective date, the Permittee shall submit to the Division a
summary of actions taken towards achieving compliance with the Total Copper, Total Zinc,
Dichromobromomethane and Bis(2-ethylhexyl) phthalate limitations specified in Section A. (1.).
(iii.) Within three (3) years of the permit effective date, the Permittee shall submit to the Division a
summary of actions taken towards achieving compliance with the Total Copper, Total Zinc,
Dichromobromomethane and Bis(2-ethylhexyl) phthalate limitations specified in Section A. (1.).
(iv.) Within four (4) years of the permit effective date, the Permittee shall submit to the Division a
summary of actions taken towards achieving compliance with the Total Copper, Total Zinc, Br
Dichromobromomethane and Bis(2-ethylhexyl) phthalate limitations specified in Section A. (L).
(v.) Within five (5) years of the permit effective date, Permittee shall achieve compliance with Total
Copper, Total Zinc, Dichromobromomethane and Bis(2-ethylhexyl) phthalate limitations specified
in Section A. (I.).
Page 11 of 15

DocuSign Envelope ID: E5FFOB90-661D-4908-AECB-67C67C337E25
NCO079057
Upon approval of the Corrective Action Plan (CAP) by the Division, the report, actions, and implementation
dates become an enforceable part of this permit. Any modifications to the schedule shall be requested to the
Division at least ninety (90) days before the deadline. Modifications to the schedule more than four months will
be subject to public notice.
Annual summaries and the CAP shall include the owner's name, NPDES permit number, and a Permittee contact
person and shall be submitted to:
NCDEQ / Division of Water Resources
NPDES Permitting
1617 Mail Service Center
Raleigh, NC 27699-1617
NCDEQ / Division of Water Resources
Washington Regional Office
943 Washington Square Mall
Washington, NC 27889
A.(7.) PFAS MONITORING REQUIREMENT [NCGS 143-215.1(b.)]
This reporting requirement for the per- and polyfluoroalkyI 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 2/year
frequency.
Find the current parameters listed under Table 1 of the 4'h 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.(8.) 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.
Page 12 of 15

DocuSign Envelope ID: E5FFOB90-661D-4908-AECB-67C67C337E25
NCO079057
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.
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 (C WA) 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 EPNs NPDES Electronic Reporting Rule is found at:
https://www. federalregister.gov/documentsl2O l 5/ l 0/22/2015-24954/national-pollutant-discharge-
elimination-system-npdes-electronic-reporting-rule
Electronic submissions must start by the dates listed in the "Reporting Requirements" section above.
Page 13 of 15

DocuSign Envelope ID: E5FFOB90-661 D-4908-AECB-67C67C337E25
NCO079057
3. How to Request a Waiver from Electronic Reportin¢
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 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/edm r
4. Signatory Requirements (Supplements Section B. (11.) (b) and Supersedes Section B. (11.) (d)]
All eDMRs submitted to the permit issuing authority shall be signed by a person described in Part II, Section
B. (I1.)(a) or by a duly authorized representative of that person as described in Part II, Section B. (I I.)(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 certify, under penalty of taw, 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. "
Page 14 of 15

DocuSign Envelope ID: E5FFOB90-661D-4908-AECB-67C67C337E25
NCO079057
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 15 of 15