NC0020559_Draft Permit_20231012

DocuSign Envelope ID: 18F2lA72-lCD0-416A-857F-63964B3204A5
ROY COOPER
Governor
ELIZABETH S. BISER
Secretary
RICHARD E. ROGERS, JR.
Director
NORTH CAROLINA
Environmental Quality
October 11, 2023
Ms. Clarissa Lipscomb, Director of Water Resources
City of Henderson
PO Box 1434
Henderson, North Carolina 27536-1434
Subject: Draft NPDES Permit Renewal
Permit NCO020559
Henderson WRF
Vance County
Grade IV Biological WPCS
SIC Code 4952
Dear Ms. Lipscomb:
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:
To better identify nitrogen in the effluent, monthly monitoring for TKN and NO2+NO3
have been added to the permit at both the 4.14 and 6.0 MGD flow tiers [See A.(1.) and A.(2.)].
Calendar quarter was specified and defined in the Total Phosphorus footnote for clarity
[See Footnote 4 in A.(1.) and A.(2.)].
Based on the reasonable potential analysis (RPA) showing no reasonable potential to
violate state water quality standards, limits and monitoring requirement for Total Copper and
monitoring requirements for Total Cadmium, Total Selenium and Total Silver have been
removed from the permit at both flow tiers [See A.(1.) and A.(2.)].
Based on the reasonable potential analysis (RPA) showing reasonable potential to violate
state water quality standards, Total Zinc limits have with monthly monitoring have been added
to the permit at both flow tiers [See A.(1.) and A.(2.)].
Based on Mercury TMDL evaluation showing mercury values reported at levels > 1 ng/L
and since the permitted flow is greater than 2 MGD, wording in Special Condition A.(6.)
Mercury Minimization Plan has been revised 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 CFR 136
method published in the Federal Register [See Special Condition A. (7.) PFAS Monitoring
Requirements].
Based on Division instream data of Nutbush Creek showing a likelihood of stream
impairment for Fecal Coliform downstream of the outfall, instream monitoring for Fecal
Coliform has been added to the permit at all locations (U, D1 and D2) at a weekly frequency
[See A.(3.)].
D EQ �� 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
919.707.9000

DocuSign Envelope ID: 18F21A72-1CD0-416A-857F-63964B3204A5
To better identify nutrient patterns and effluent impact on the receiving water nutrient
concentrations, instream monitoring for Ammonia, TKN, NO2+NO3 and Total Phosphorus
have been extended from summer months to year-round at D 1 and D2. In addition, monthly
monitoring for the above parameters have been added at the upstream location, U. Upstream
monitoring shall be grab surface samples [See A.(3.)].
• Some of the wording has changed in Special Condition A. (4.), Chronic Toxicity Permit
Limit, please review each paragraph carefully.
Special Condition A. (5.) has been modified to include the specific three years in which
the Effluent Pollutant Scan shall be performed (2025, 2026, and 2027). In addition, at the end
of the Special Condition, 2°1 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.
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. (8.)].
The map has been revised to show instream monitoring locations.
The NPDES standard conditions (Parts II, I1I, 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 Vance 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,
o«usan.a et:
4��AV
Gary Perlmutter, Environmental Specialist II
NPDES Municipal Permitting Unit
D_E Q North Carolina Department of Environmental Quality 1 Division of Water Resources
512 North Salisbury Street 1 1611 Mail Sen ice Center 1 Raleigh. North Carolina 27699-1611
yM� 919.707.9000

DocuSign Envelope ID: 18F21A72-1CD0-416A-857F-63964B3204A5
Hardcopy: NPDES Files
eCopy: US EPA Region 4
DWR / Raleigh Regional Office / Water Quality / Vanessa Manuel
DWR / Operator Certification Program / Maureen Kinney
DWR / Aquatic Toxicology Branch / Cindy Moore & Molly Nicholson
DWR / Municipal Permitting Unit / Keyes McGee
City of Henderson / Brandon Elliott (ORC)
Virginia DEQ / Piedmont Region / Azra Bilalagic ([e-mail])
Q North Carolina Department of Environmental Quality I Division of Water ResourcesD_ E ;:
512 North Salisbury Street 1 1611 Mail Service Center I Raleigh, North Carolina 27699-1611
NONII (AHULINA 919.707.9000
Oa0r1"ri1 0 FmMmnbl pwNty

DocuSign Envelope ID: 18F21A72-1CD0-416A-857F-63964B3204A5
Permit NCO020559
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENTAL QUALITY
DIVISION OF WATER RESOURCES
PERMIT
TO DISCHARGE WASTEWATER UNDER THE
NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM
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 Henderson
is hereby authorized to discharge wastewater from a facility located at the
Henderson Water Reclamation Facility
1646 W Andrews Avenue
Henderson
Vance County
to receiving waters designated as the Nutbush 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.
This permit shall become effective Month 1, 20xx.
This permit and authorization to discharge shall expire at midnight on March 31, 2028.
Signed this day Month xx, 20xx
DRAFT
for Richard E. Rogers, Jr., Director
Division of Water Resources
By Authority of the Environmental Management Commission
Page 1 of 13

DocuSign Envelope ID: 18F21A72-1CD0-416A-857F-63964B3204A5
Permit NCO020559
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 Henderson
is hereby authorized to:
1. Continue to operate and maintain the wastewater treatment works identified on the Cover, an existing 4.14
MGD facility consisting of the following components:
• Bar screen and grit chamber
• Biological nutrient removal system — 4 anaerobic basins, 2 anoxic zones, 2 oxidation ditches with 4
aerators (100 HP)
• Final clarifiers
• Tertiary filters
• Post aeration
• UV disinfection with sodium hypochlorite backup
• Aerobic digester
• Sludge holding tank
• Two (2) waste activated sludge pumps
• Screw thickener
• Screw thickener discharge pump
Located at the Henderson Water Reclamation Facility, 1646 West Andrews Avenue in Henderson, Vance
County, and
2. after receiving an Authorization to Construct from the Division of Water Resources, followed by submittal of
an Engineer's Certification once construction has been completed, construct and operate wastewater treatment
facilities with an ultimate capacity of 6.0 MGD, and
3. discharge from said treatment works at the location specified on the attached map via Outfall 001 into Nutbush
Creek, classified C waters in the Roanoke River Basin and 03030102 HUC.
Page 2 of 13

DocuSign Envelope ID: 18F2lA72-lCDO-416A-857F-63964B3204A5
Permit NCO020559
PART I
A.(L) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS (4.14 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 6.0 MGD or
permit expiration, whichever is sooner, 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
EFFLUENT LIMITS
MONITORING REQUIREMENTS
Parameter Code
Monthly
Weekly
Daily
Measurement
Sample
Sample
Average
Average
Maximum
Frequency
Type
Location
Flow 50050
4.14 MGD
Continuous
Recordin g
Influent or
Effluent
BOD5 (20°C) 2 C0310
6.0 mg/L
9.0 mg/L
Daily
Composite
Influent &
(Apr 1 - Oct 31)
Effluent
BOD5 (20°C) 2 C0310
12.0 mg/L
18.0 mg/L
Daily
Composite
Influent &
(Nov 1 - Mar 31)
Effluent
Total Suspended Solids (TSS) 2 C0530
30.0 mg/L
45.0 mg/L
Daily
Composite
Influent &
Effluent
Ammonia (NH3 as N) C0610
3.0 mg/L
9.0 mg/L
Daily
Composite
Effluent
(Apr i - Oct 31)
Ammonia (NH3 as N) C0610
6.0 mg/L
18.0 mg/L
Daily
Composite
Effluent
(Nov 1 -Mar 31)
Fecal Coliform 31616
(geometric mean)
200/100 mL
400/100 mL
Daily
Grab
Effluent
Total Residual Chlorine (TRC) 3 50060
17 µg/L
Daily
Grab
Effluent
Dissolved Oxygen (DO) 00300
Daily Average 2: 6.0 mg/L
Daily
Grab
Effluent
pH 00400
Between 6.0 and 9.0 Standard Units
Daily
Grab
Effluent
Temperature (°C) 00010
Monitor and Report
Daily
Grab
Effluent
Conductivity (µmhos/cm) 00094
Monitor and Report
Daily
Grab
Effluent
Total Phosphorus ° C0665
1.0 mg/L (Quarterly Average)
Weekly
Composite
Effluent
(Apr 1 — Sep 30)
Total Phosphorus ° C0665
(Oct 1 —Mar 31)
1.5 mg/L (Quarterly Average)
Weekly
Composite
Effluent
TKN (mg/L) 00625
Monitor and Report
Monthly
Composite
Effluent
NO3-N + NO2-N (mg/L) 00630
Monitor and Report
Monthly
Composite
Effluent
Total Nitrogen 5 (mg/L) C0600
Monitor and Report
Monthly
Calculated
Effluent
Total Hardness (as CaCO3) 6 00900
Monitor and Report
Quarterly
Composite
Effluent
(mg/L)
Total Zinc 01092
238 µg/L
238 µg/L
Monthly
Composite
Effluent
PFAS (ng/L) various
Footnote 7
Quarterly
Grab
Effluent
Chronic Toxicity s TGP3B
Monitor and Report
Quarterly
Composite
Effluent
Effluent Pollutant Scans NCO]
Monitor and Report
Footnote 9
Footnote 9
Effluent
Footnotes on next page.
Page 3 of 13

DocuSign Envelope ID: 18F21A72-1CD0-416A-857F-63964B3204A5
Permit NCO020559
Footnotes (from previous page):
1. The Permittee shall submit Discharge Monitoring Reports electronically using NC DWR's eDMR application [see A.(8.)].
2. The monthly average effluent BOD5 and TSS concentrations shall not exceed 15% of the respective influent value (85%
removal).
3. 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.
4. Total Phosphorus compliance shall be based upon a quarterly average of weekly samples, reported each calendar quarter
(summer: June, September; winter: December, _ h).
5. For a given wastewater sample, TN = TKN 3-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. Effluent hardness should be performed in conjunction with testing for hardness -dependent metals (cadmium, copper, lead,
nickel, silver, and zinc).
7. See Special Condition A.(7.).
8. Chronic Toxicity (Ceriodaphnia dubia) P/F at 90% with testing in January, April, July and October. See Special Condition
A.(4.).
9. The permittee shall perform three effluent pollution scans during the term of this permit. See Special Condition A.(5.).
b. There shall be no discharge of floating solids or visible foam in other than trace amounts.
A.(2.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS (6.0 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 upon expansion to 6.0 MGD and lasting until permit expiration, the Permittee is
authorized to discharge treated municipal and industrial wastewater from Outfall 001. Such discharges shall
be limited and monitored 1 by the Permittee as specified below:
PARAMETER
EFFLUENT LIMITS
MONITORING REQUIREMENTS
Parameter Code
Monthly
Weekly
Daih
Measurement
Sample
Sample
Average
Average
Maximum
Frequency
Type
Location
Flow 50050
6.0 MGD
Continuous
Recordin g
Influent or
Effluent
BOD5 (20°C) 2 C0310
(Apr 1 - Oct 31)
5.0 mg/L
7.5 mg/L
Daily
Composite
Influent &
Effluent
BOD5 (20°C) 2 C0310
10.0 mg/L
15.0 mg/L
Daily
Composite
Influent &
Effluent
(Nov 1 - Mar 31)
Total Suspended Solids (TSS) 2 C0530
30.0 mg/L
45.0 mg/L
Daily
Composite
Influent &
Effluent
Ammonia (NI-b as N) C0610
1.0 mg/L
3.0 mg/L
Daily
Composite
Effluent
(Apr 1 - Oct 31)
Ammonia (Nfb as N) C0610
2.0 mg/L
6.0 mg/L
Daily
Composite
Effluent
(Nov 1 - Mar 31)
Fecal Coliform 31616
200/100 mL
400/100 mL
Daily
Grab
Effluent
(geometric mean)
Total Residual Chlorine (TRC) 3 50060
17 µg/L
Daily
Grab
Effluent
Dissolved Oxygen (DO) 00300
Daily Average >_ 6.0 mg/L
Daily
Grab
Effluent
Page 4 of 13

DocuSign Envelope ID: 18F21A72-1CD0-416A-857F-63964B3204A5
Permit NCO020559
pH 00400
Between 6.0 and 9.0 Standard Units
Daily
Grab
Effluent
Temperature (°C) 00010
Monitor and Report
Daily
Grab
Effluent
Conductivity (µmhos/cm) 00094
Monitor and Report
Daily
Grab
Effluent
Total Phosphorus ° C0665
0.5 mg/L (Quarterly Average)
Weekly
Composite
Effluent
TKN (mg/L) 00625
Monitor and Report
Monthly
Composite
Effluent
NO3-N + NO2-N (mg/L) 00630
Monitor and Report
Monthly
Composite
Effluent
Total Nitrogen 5 (mg/L) C0600
Monitor and Report
Monthly
Calculated
Effluent
Total Hardness (as CaCO3)' 00900
(mg/L)
Monitor and Report
Quarterly
Composite
Effluent
Total Zinc 01092
235 µg/L
235 µg/L
Monthly
Composite
Effluent
PFAS (ng/L) various
Footnote 7
Quarterly
Grab
Effluent
Chronic Toxicity $ TGP3B
Monitor and Report
Quarterly
Composite
Effluent
Effluent Pollutant Scan 9 NCO]
Monitor and Report
Footnote 9
Footnote 9
Effluent
Footnotes:
1. The Permittee shall submit Discharge Monitoring Reports electronically using NC DWR's eDMR application [See A.(8.)].
2. The monthly average effluent BOD5 and TSS concentrations shall not exceed 15% of the respective influent value (85%
removal).
3. 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.
4. Total Phosphorus compliance shall be based upon a quarterly average of weekly samples, reported every calendar quarter
(March, June, September, December).
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. Effluent hardness should be performed in conjunction with testing for hardness -dependent metals (cadmium, copper, lead,
nickel, silver, and zinc).
7. See Special Condition A.(7.).
8. Chronic Toxicity (Ceriodaphnia dubia) P/F at 90% with testing in January, April, July and October. See Special Condition
A.(4.).
9. The permittee shall perform three effluent pollution scans during the term of this permit. See Special Condition A.(5.).
b. There shall be no discharge of floating solids or visible foam in other than trace amounts.
Page 5 of 13

DocuSign Envelope ID: 18F21A72-1CD0-416A-857F-63964B3204A5
Permit NCO020559
A.(3.) INSTREAM MONITORING REQUIREMENTS [15A NCAC 02B .0200 et seq.]
a. 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
MEASUREMENT
FREQUENCY
SAMPLE TYPE
SAMPLE
LOCATION !
Total Hardness (as CaCO3) (mg/L) 2 00900
Quarterly
Grab
U
Dissolved Oxygen (DO) (mg/L) 00300
Weekly
Grab
U, D1, D2
Temperature (°C) 00010
Weekly
Grab
U, D1, D2
Conductivity (µmhos/cm) 00094
Weekly
Grab
U, Dl, D2
Fecal Coliform (cfu/100 mL) 31616
Weekly
Grab
U, 131, D2
Dissolved Oxygen (DO) (mg/L) 00300
Monthly
Profile 3
D1, D2
Temperature (°C) 00010
Monthly
Profile
131, D2
Secchi Depth (m) NA
Monthly
Composite 4
U, DI, D2
NO3-N +NO2-N (mg/L) 00630
Monthly
Composite 4
U, DI, D2
Ammonia (NH3 as N) (mg/L) C0610
Monthly
Composite 4
U, 131, D2
TKN (mg/L) 00625
Monthly
I Composite 4
1 U, D1, D2
Total Phosphorus (mg/L) C0665
Monthly
Composite 4
U, 131, D2
Chlorophyll -a 32230
Monthly
Composite 4
DI, D2
Footnotes:
1. U = upstream at NC Highway 39. DI = downstream at the power lines. D2 = downstream immediately above the
confluence of Indian Creek and Crooked Creek.
2. The Permittee shall sample instream hardness upstream of the facility's discharge. The sample shall be representative of
the hardness in the stream.
3. Profiles should be taken at one (1) meter intervals.
4. Composites shall be collected as spatial composites throughout the photic zone (i.e., 2x the Secchi depth.) at downstream
sites only.
b. As per 15A NCAC 213.0505(c)(4), stream sampling may be discontinued at such time as flow conditions in the
receiving waters or extreme weather conditions will result in a substantial risk of injury or death to persons
collecting samples. In such cases, on each day that sampling is discontinued, written justification for the
discontinuance shall be specified in the monitoring report for the month in which the event occurred. This
provision shall be strictly construed and may not be utilized to avoid the requirements of 15A NCAC 2B.0500
when performance of these requirements is attainable. When there is discontinuance pursuant to this provision,
stream sampling shall be resumed at the first opportunity after the risk period has ceased.
A.(4.) CHRONIC TOXICITY PERMIT LIMIT (QUARTERLY)
[15A NCAC 02B .0200, .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% at 4.14 and 6.0 MGD.
The permit holder shall perform at a minimum, quarterly monitoring using test procedures outlined in the "North
Carolina Ceriodaphnia Chronic Effluent Bioassay Procedure," (Revised December 2010, or subsequent versions)
or "North Carolina Phase II Chronic Whole Effluent Toxicity Test Procedure" (Revised December 2010, or
Page 6 of 13

DocuSign Envelope ID: 18F21A72-1CD0-416A-857F-63964B3204A5
Permit NCO020559
subsequent versions). The tests will be performed during the months of January, April, July and October. 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 11 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 THP311; 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
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 7 of 13

DocuSign Envelope ID: 18F21A72-lCD0-416A-857F-63964B3204A5
Permit NCO020559
A.(5.) 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. For
the 6.0 MGD flow tier, the Permittee shall perform three effluent pollutant scans in the three following years
after expansion occurs. 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.(4.) CHRONIC TOXICITY PERMIT LIMIT (QUARTERLY)], 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-trichloroethane
34511
1,3-dichlorobenzene
34566
Chromium
C0034
Trichloroethylene
39180
1,44chlorobenzene
34571
Copper
01042
Vinyl chloride
39175
3,34chlorobenzidine
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
Voladle 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 8 of 13

DocuSign Envelope ID. 18F21A72-1CD0-416A-857F-63964B3204A5
Permit NC0020559
(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 NCO1 - 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.nc.gov/Forms/NPDES_WW-EDMR-Supplemental-Form
(c.) 2°a-Species Toxicity Testing and Reporting.
(i.) In addition to the quarterly toxicity tests required in Condition A.(4.) CHRONIC TOXICITY PERMIT
LIMIT (QUARTERLY), 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 2°d species test shall coincide with the quarterly samples collected for [CHRONIC
TOXICITY PERMIT LIMIT (QUARTERLY)]; 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 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 9 of 13

DocuSign Envelope ID: 18F21A72-1CD0-416A-857F-63964B3204A5
Permit NCO020559
A.(6.) 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.(7.) 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 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. Reyortin¢ 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
Page 10 of 13

DocuSign Envelope ID: 18F21A72-1CD0-416A-857F-63964B3204A5
Permit NC0020559
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 (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 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:
hiips://www.federaire ig•'ster.gov/documents/2015/10/22/2015-24954/national-pollutant-discharge-elimination-
s sty em-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
Page 11 of 13

DocuSign Envelope ID: 18F21A72-1CD0-416A-857F-63964B3204A5
Permit NC0020559
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:
hM://deg.nc.p-ov/about/divisions/water-resources/edmr
4. Signatory Repuirements [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. (I I.)(a) or by a duly authorized representative of that person as described in Part II, Section B. (I 1.)(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:
ho://deg.nc.pov/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 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.)1
The Permittee shall retain records of all Discharge Monitoring Reports, including eDMR submissions. These
records or copies shall be maintained for a period of at least 3 years from the date of the report. This period
may be extended by request of the Director at any time [40 CFR 122.41 ].
Page 12 of 13

DocuSign Envelope ID: 18F21A72-1CD0-416A-857F-63964B3204A5
City of Henderson
Henderson Water Reclamation Facility
USGS T000 Quad: Henderson, NC Latitude: 36" 21' 01" N
Recelving Stream: Nutbush Creek Longitude: 78° 24' 40" W
Drainagt Basin: Roanoke Sub -Basin: 03-02-06
Stream Class: C 8-Digit HUC: 03010102
Permit NCO020559
Facility
Location AAW
(map not to scale)
F--;PDES Permit NC0020559
jV Vance County
Page 13 of 13