NC0026689_Draft Permit_20210713

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ROY COOPER
Governor
ELIZABETH S.BISER ` 4 «.a.o ,
Secretary oircam '
S.DANIEL SMITH NORTH CAROLINA
Director Environmental Quality
July 13, 2021
Town of Denton
Attn: Kenneth Gamble,Town Manager
P.O.Box 306
Denton,NC 27239
Subject: Draft NPDES Permit Renewal
Permit NC0026689
Town of Denton WWTP
Davidson County
Facility Grade III(0.8 MGD)
SIC Code 4952
Dear Applicant:
Enclosed with this letter is a copy of the Draft NPDES permit renewal for the Denton WWTP
(Facility).Please review this draft carefully to ensure a thorough understanding of the requirements
and conditions it contains. There are few changes from the existing permit, including the
following:
• Facility components list on the Supplement to Permit Cover Sheet were adjusted according
to the flow process diagram provided with the permit application renewal.
• Parameter codes were included in the Effluent Limitations and Monitoring Requirements
tables. [See Section A. (1.)].
• Based on NPDES guidance regarding the reduction of monitoring frequencies in NPDES
permits for exceptionally performing facilities,monitoring requirements for total suspended
solids and ammonia have been reduced to twice per week [See Section A. (1)].
• Based on the reasonable potential analysis (RPA) predicting a maximum effluent copper
concentration that is greater than the allowable discharge concentration based on state water
quality standards, limit and monthly monitoring for copper has been added to the permit
[See Section A. (1.)]. To provide an opportunity for the Town to develop a plan to assess
sources of copper to come in compliance with the limit in Section A.(1.),a 3-year schedule
of compliance has been added to the permit [See Special Condition A. (5.) Schedule of
Compliance for copper Limitations].
• Based on Mercury Total Maximum Daily Load(TMDL)evaluation showing annual average
mercury values greater than the Water Quality Based Effluent Limit (WQBEL), 12 ng/L,
biannual monitoring for mercury has been added to the permit [See Section A. (1.)].
• The Division is implementing dissolved metals standards in all permits, per the 2016
revisions to State water quality standards. As such, the NPDES Permitting Unit will need
site-specific effluent hardness data and instream hardness data upstream of the discharge for
each Facility monitoring these metals in order to calculate permit limitations. Effluent
Q North Carolina Department of Environmental Quality I Division of Water Resources
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hardness and instream hardness sampling, upstream of the discharge, have been added to
the permit at a monitoring frequency of quarterly [See A.(1.)].
• Based on the RPA predicting a maximum effluent bis(2-ethylhexyl)phthalate concentration
that is greater than the allowable discharge concentration— based on state water quality
standards, a limit and monthly monitoring requirement for bis(2-ethylhexyl) phthalate has
been added to the permit [See Section A. (1)]. To provide an opportunity for the Town to
develop a plan to assess sources of bis(2-ethylhexyl)phthalate to come in compliance with
the limit in Section A. (1.), a 3-year schedule of compliance has been added to the permit
[See Special Condition A. (6.) Schedule of Compliance for bis(2-ethylhexyl) phthalate
Limitations]. Since the bis(2-ethylhexyl) phthalate limit is below its current Practical
Quantification Limit (PQL) (< 10 µg/L), to show compliance with the limit, the
Division expects non-detects at the current PQL (if the PQL gets updated, the Permittee
must use the method with the updated PQL -the method with the lowest detection level
must be used).
• Instream monitoring requirements were adjusted in the Effluent Limitations and Monitoring
Requirements tables to account for variable monitoring frequencies [See Section A. (1.)].
• The Town of Denton reported total silver at less than detection,with detection levels of <
5.0 µg/L, in the Effluent Pollutant Scans(EPS)and discharge monitoring reports(DMRs).
Based on the RPA,the Town's total silver allowable discharge concentration is 0.06 µg/L.
The DWR's laboratory identifies the target PQL for silver as 1.0 µg/L. 15A NCAC
2B .0505 (e) (4) requires that all test procedures must producdetection and reporting
levels that are below the permit discharge requirements,nd all data generated must be
reported to the approved detection level or lower reporting level of the procedure. If no
approved methods can achieve a detection level below the perndiischarge requirement(or
allowable discharge concentration),the method with the lowest detection level must be
used.
• The Town reported cadmium at less than detection,with detection levels of <2.0 µg/L, in
the EPS and DMRs. Based on the RPA, the Town's cadmium allowable discharge
concentration is 1.08 µg/L.DWR's laboratory identifies the target PQL for cadmium as 0.5
µg/L.As explained above,the method with the lowest detection level must be used.
• The Town reported arsenic at less than detection,with detection levels of < 10.0 µg/L, in
the EPS and DMRs.Based on the RPA,the predicted maximum concentration was>50%
of the allowable concentration, 7.0 µg/L. DWR's laboratory identifies the target PQL for
arsenic as 2.0 µg/L.As explained abovethe method with the lowest detection level must
be used.
• The Town reported lead at less than detection,with detection levels of< 10.0 µg/L, in the
EPS and DMRs.Based on the RPA,the Town's lead allowable discharge concentration is
7.1 µg/L.DWR's laboratory identifies the target PQL for lead as 2.0 µg/L. As explained
above,the method with the lowest detection level must be used.
• The Town reported selenium at less than detection,with detection levels of< 10.0 µg/L, in
the EPS and DMRs. Based on the RPA, the Town's selenium allowable discharge
concentration is 5.0 µg/L.DWR's laboratory identifies the target PQL for selenium as 1.0
µg/L.As explained above,the method with the lowest detection level must be used.
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• Language has been added to update information about upstream and downstream sampling
locations according to the locations provided with the permit application renewal. [See
Section A. (1.)Footnote 2].
• Special Condition A. (3.) includes the specific three years in which the Effluent Pollutant
Scan shall be performed (2023, 2024, and 2025) and includes requirements for proper
completion of annual pollutant scan in the eDMR system.
• 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 Special Condition A.(4.)].
• Federal regulations require electronic submittal of all 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.(4.)].
May 15, 2020, Town's cover letter for renewal application requests monitoring reduction for
BOD5, ammonia nitrogen, fecal coliform, total suspended solids (TSS); removal or reduction of
daily effluent monitoring for temperature; and removal of monitoring for dichlorobromomethane
and bis(2-ethylhexyl)phthalate.
As explained above, frequency monitoring requirements were updated for TSS and ammonia. No
changes are proposed for temperature per 15A NCAC 2B .0500 requirements, and
dichlorobromomethane and bis(2-ethylhexyl)phthalate presented concentrations greater than the
allowable discharge concentration based on state water quality standards; therefore, limits and
h Division added compliance
monthly monitoring are deemed necessary. The D v s><on 3-year schedule to
provide an opportunity for the Town to develop a plan to assess sources of bis(2-ethylhexyl)
phthalate.
The NPDES standard conditions (Parts II, III, and IV), 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 Davidson 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 contact me at(919) 707-9130 or by email at diana.yitbareknancdenr.gov.
Q4 North Department Environmental Qua I Division Re
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Sincerely,
Diana Yi barek, Engineer
NPDES Municipal Permitting Unit
Hardcopy: NPDES Files
Ecopy: Denton WWTP/Troy Branch
US EPA Region 4
DWR/Winston-Salem Regional Office(WSRO)/Lon Snider and Jenny Graznak
DWR/NPDES Pretreatment/Kristen Litzenberger and Jim Gonsiewski
DWR/Ecosystems Branch/Mark Vander Borgh
DWR/Public Water Supply/Eric Hudson
DWR/Aquatic Toxicology Branch/Zach Thomas and Cindy Moore
DWR/Operator Certification Program/Maureen Kinney
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Permit No.NC0026689
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENTAL QUALITY
DIVISION OF WATER RESOURCES
DRAFT PERMIT
TO DISCHARGE WASTEWATER UNDER THE
NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM
In compliance with the provisions of North Carolina General Statute 143-215.1,other lawful standards and
regulations promulgated and adopted by the North Carolina Environmental Management Commission,and the
Federal Water Pollution Control Act,as amended,the
Town of Denton
is hereby authorized to discharge wastewater from a facility located at the
Denton Wastewater Treatment Plant
300 Council Access Road,Denton NC 27239
Davidson County
to receiving waters designated as Lick Creek in the Yadkin Pee Dee River Basin in accordance with
effluent limitations, monitoring requirements, and other conditions set forth in Parts I, II, III, and IV
hereof.
This permit shall become effective Month DD,2021
This permit and authorization to discharge shall expire at midnight on February 28,2026.
Signed this day Month DD,2021.
DRAFT
For S.Daniel Smith,Director
Division of Water Resources
By Authority of the Environmental Management Commission
Page 1 of 11

Permit No.NC0026689
SUPPLEMENT TO PERMIT COVER SHEET
All previous NPDES Permits issued to this facility, whether for operation or discharge, are hereby revoked.As of this permit
issuance, any previously issued permit bearing this number is no longer effective. Therefore, the exclusive authority to
operate and discharge from this facility arises under the permit conditions, requirements, terms, and provisions included
herein.
Town of Denton is hereby authorized to
1. Continue to operate an existing 0.80 MGD wastewater treatment facility consisting of the following
components:
• Bar screen/Heli-Sieve influent screen
• Grit chamber
• Lift station
• Dual oxidation ditches with two mechanical rotors
• Four secondary clarifiers with sludge return
• Dual tertiary filters
• Two sludge digesters
• Sludge drying beds
• Effluent chlorination and dechlorination system
• Post aeration
• Standby generator
2. Discharge treated wastewater into Lick Creek in the Yadkin Pee Dee River Basin,classified as WS IV
waters,through Outfall 001. The outfall location is specified on the attached map.
Page 2 of 11

Permit No.NC0026689
PART I
A. (1.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS (0.80 MGD)
[15A NCAC 02B .0400 et seq., 02B .0500 et seq.] Grade III Biological Water Pollution Control System
[15A NCAC 08G .0302]
a) Beginning on the effective date of the permit and lasting until expiration,the Permittee is authorized to
discharge treated wastewater from Outfall 001. Such discharges shall be limited and monitored' by the
Permittee as specified below:
EFFLUENT LIMITS MONITORING REQUIREMENTS
PARAMETER Parameter Monthly Weekly Daily Measurement Sample Sample
CHARACTERISTICS Code Average Average Maximum Frequency Type Location'
Flow 50050 0.80 MGD Continuous Recording I or E
BOD,5-day,20°C3 C0310 5.0 mg/I 7.5 mg/I 3/Week Composite I and E
(April 1—October 31)
BOD,5-day,20°C3 C0310
(November 1—March 31) 10.0 mg/I 15.0 mg/I 3/Week Composite I and E
Total Suspended Solids3 C0530 30.0 mg/I 45.0 mg/I 21Week Composite I and E
Dissolved Oxygen 00300 Daily Average z 6 mg/I 3/Week Grab E
pH 00400 Between 6.0 and 9.0 S.U. 3/Week Grab E
NH3 as N C0610
(April 1—October 31) 2.0 mg/I 6.0 mg/I 21Week Composite E
as N C0610 4.0 mg/I 12.0 mg/I 21Week Composite E
(November 1—March 31)
Total Residual Chlorine' 50060 17.0 pg/I 3/Week Grab E
Temperature,°C 00010 Monitor and Report Daily Grab E
Conductivity,pmho/cm 00094 Monitor and Report 3/Week Grab E
Fecal Coliform 31616 200/100 ml 400/100 ml 31Week Grab E
Total Nitrogenfi C0600 Monitor and Report Monthly Composite E
(NO2+NO3+TKN),mg/I
Total Phosphorus,mg/I C0665 Monitor and Report Monthly Composite E
Total Coppert3 01042 15.6 pg/I Monthly Composite E
Total Nickel,pg/I 01067 Monitor and Report Quarterly Composite E
Total Cadmium6 pg/I 01027 Monitor and Report Quarterly Composite E
Total Silver'pg/I 01077 Monitor and Report Quarterly Composite E
Total Mercury12 COMER Monitor and Report See Footnote 12 Grab E
Hardness—Total as 00900 Monitor and Report QuarterlyComposite E
[CaCO3]8,mg/I p p
Dichlorobromomethane 32101 1.3 pg/I Monthly Composite E
Bis(2-Ethylhexyl) 39100 0.45pg/I MonthlyComposite E
Phthalate14 p
Dissolved Oxygen,mg/I 00300 Monitor and Report 3/Week Grab9 U and D
Temperature,°C 00010 Monitor and Report 31Week Grab9 U and D
Conductivity,pmho/cm 00094 Monitor and Report 3/eek Grab9 U and D
Hardness—Total as 00900
[CaCO3]8,mg/I Monitor and Report Quarterly Composite U
Chronic Toxicityt0 TGP3B Footnote 10 Quarterly Composite E
Effluent Pollutant Scan11 NC01 Footnote 11 Footnote 11 Footnote E
Footnotes:
1. The Permittee shall submit discharge monitoring reports electronically using NC DWR's eDMR application system. See Special
Condition A.(4).
2. Sample locations: E-effluent, I-influent, U-upstream about 5000 feet from the outfall at Flat Swamp Rd, D-downstream about 1.3
miles from the outfall at the NCSR 1002 crossing near Healing Springs.
3. The monthly average effluent BODS and TSS concentrations shall not exceed 15%of the respective influent value(85%removal).
Page 3 of 11

Permit No.NC0026689
4. The Division shall consider all effluent total residual chlorine (TRC) values reported below 50 µg/l to be in compliance with the
permit. However, the Pennittee 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,total nitrogen(TN)=TKN+NO3-N+NO2-N,where TKN is total Kjeldahl nitrogen,and NO3-N
and NO2-N are nitrate and nitrite nitrogen,respectively.
6. Total cadmium shall be tested to its lowest reporting level of 0.5 µg/l.
7. Total silver shall be tested to its lowest reporting level of 1.0 µg/l.
8. Effluent Total Hardness sampling shall be performed in conjunction with testing for hardness-dependent metals (cadmium, copper,
lead,nickel,silver,and zinc)and shall all coincide with sampling for chronic toxicity.The Permittee shall sample instream hardness
upstream of the facility's discharge.The sample shall be representative of the hardness in the receiving stream.
9. Instream monitoring shall be conducted three times per week during June,July,August,and September and once per week during the
remaining months of the year. Instream monitoring for DO, temperature, and conductivity is provisionally waived in light of the
Permittee's participation in the Yadkin Pee Dee River Basin Association. Instream monitoring shall be conducted as stated in this
permit should the Permittee end its participation in the Association.
10. Chronic Toxicity(Ceriodaphnia)P/F @ 90%;February,May,August,November;See Special Condition A.(2).
11. The Permittee shall perform three Effluent Pollutant Scans during the term of this permit,See Special Condition A.(3).
12. Mercury sampling must occur twice a year during May and November.
13. Follow the compliance schedule for copper outlined in Special Condition A.(5).
14. Follow the compliance schedule for bis(2-ethylhexyl)phthalate outlined in Special Condition A.(6).
There shall be no discharge of floating solids or foam visible other than trace amounts.
Page 4 of 11

Permit No.NC0026689
A. (2) CHRONIC TOXICITY PERMIT LIMIT(QUARTERLY) [15A NCAC 02B.0200 et seq.]
The effluent discharge shall at no time exhibit observable inhibition of reproduction or significant mortality to
Ceriodaphnia dubia at an effluent concentration of 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 II Chronic Whole Effluent Toxicity Test Procedure" (Revised- December 2010) or
subsequent versions. 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.
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 ll Chronic Whole Effluent Toxicity Test
Procedure"(Revised-December 2010 or subsequent versions).
All toxicity testing results required as part of this permit condition will be entered on the Effluent Discharge
Monitoring Form(MR-1)for the months in which tests were performed,using the parameter code TGP3B for the
pass/fail results and THP3B for the Chronic Value. Additionally,DWR Form AT-3 (original)is to be sent to the
following address:
Attention: North Carolina Division of Water Resources
Water Sciences Section/Aquatic Toxicology Branch
1621 Mail Service Center
Raleigh,NC 27699-1621
Or,results can be sent to the email,ATForms.ATB@a,ncdenr.gov.
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

Permit No.NC0026689
A. (3)EFFLUENT POLLUTANT SCAN (Municipal POTWs) [G.S. 143-215.1(b)]
a) 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: 2023, 2024, and 2025. Analytical
methods shall be in accordance with 40 CFR Part 136 and shall be sufficiently sensitive to determine
whether parameters are present in concentrations greater than applicable standards and criteria. Samples
should be collected with one quarterly toxicity test each year and must represent seasonal variation [i.e.,
do not sample in the same quarter every year]. Unless otherwise indicated, metals shall be analyzed as
"total recoverable."
Ammonia(as N) C0610 1,2-dichloroethane 32103 Bis(2-chloroethoxy)methane 34278
Chlorine(total residual,TRC 50060 Trans-1,2-dichloroethylene 34546 Bis(2-chloroethyl)ether 34273
Dissolved oxygen 00300 1,1-dichloroethylene 34501 Bis(2-chloroisopropyl)ether 34283
Nitrate 00620 1,2-dichloropropane 34541 Bis(2-ethylhexyl)phthalate 39100
Nitrite 00615 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 01034 Trichloroethylene 39180 I,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-creso 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 39702
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 34526 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 34551
1,1-dichloroethane 34496 Benzo(k)fluoranthene 34242
b) Reporting. Test results shall be reported electronically via eDMR or on DWR Form—DMR-PPA-1 (or
on a form approved by the Director)by December 31st of each designated sampling year.
Page 6of11

Permit No.NC0026689
c) The Permittee must at least report completion of the test in the eDMR system by entering"1"or"Y"for
parameter code NC01 - Annual Pollutant Scan. If utilizing the DWR Form submit to the following
address:
NC DEQ/DWR/NPDES 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
d) Additional Toxicity Testing Requirements for Municipal Permit Renewal. Please note that
Municipal facilities that are subject to the Effluent Pollutant Scan requirements listed above are also
subject to additional toxicity testing requirements specified in Federal Regulation 40 CFR 122.21(j)(5).
The US EPA requires four (4) toxicity tests for a test organism other than the test species currently
required in this permit. The multiple species tests should be conducted either quarterly for a 12-month
period prior to submittal of the permit renewal application,or four tests performed at least annually in the
four-and one-half year period prior to the application. These tests shall be performed for acute or chronic
toxicity,whichever is specified in this permit. The multiple species toxicity test results shall be filed with
the Aquatic Toxicology Branch at the following address:
North Carolina Division of Water Resources
Water Sciences Section/Aquatic Toxicology Branch
1621 Mail Service Center
Raleigh,North Carolina 27699-1621
Or,results can be sent to the email,[e-mail].
Contact the Division's Aquatic Toxicology Branch at 919-743-8401 for guidance on conducting the
additional toxicity tests and reporting requirements. Results should also be summarized in Part E
(Toxicity Testing Data) of EPA Municipal Application Form 2A, when submitting the permit renewal
application to the NPDES Permitting Unit.
A.(4) ELECTRONIC REPORTING OF MONITORING REPORTS [G.S. 143-215.1(b)]
Federal regulations require electronic submittal of all discharge monitoring reports(DMRs)and program reports.
The final NPDES Electronic Reporting Rule was adopted and became effective on December 21,2015.
NOTE: This special condition supplements or supersedes the following sections within Part II of this permit
(Standard Conditions for NPDES Permits):
• Section B.(11.) Signatory Requirements
• Section D.(2.) Reporting
• Section D.(6.) Records Retention
" • Section E.(5.) Monitoring Reports
1. Reporting Requirements (Supersedes Section D.(2.)and Section E.(5.)(all
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
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
Page 7 of 11

Permit No.NC0026689
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 mailing 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.
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.
NPDES Electronic Reporting Rule — Phase 2 Extension. EPA extended the Phase 2 deadline to December 21,
2025.The current compliance date,effective January 4,2021,was extended as a final regulation change published
in the November 2,2020 Federal Register.
Starting on December 21, 2025, the Permittee must electronically report the following compliance monitoring
data and reports,when applicable:
• Sewer Overflow/Bypass Event Reports;
• 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
https://www.federalregister.gov/documents/20 1 5/1 0/22/20 1 5-24954/national-pollutant-discharge-elimi nation-
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 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
Page 8 of 11

Permit No.NC0026689
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)l
All eDMRs submitted to the permit issuing authority shall be signed by a person described in Part II, Section B.
(11.Xa)or by a duly authorized representative of that person as described in Part II,Section B.(11.)(b). A person,
and not a position,must be delegated signatory authority for eDMR reporting purposes.
For eDMR submissions, the person signing and submitting the DMR must obtain an eDMR user account and
login credentials to access the eDMR system. For more information on North Carolina's eDMR system,
registering for eDMR,and obtaining an eDMR user account,please visit the following web page:
http://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 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. (6J1
The Permittee shall retain records of all Discharge Monitoring Reports, including eDMR submissions. These
records or copies shall be maintained for a period of at least 3 years from the date of the report. This period may
be extended by request of the Director at any time[40 CFR 122.41].
A.(5) COMPLIANCE SCHEDULE FOR COPPER LIMITATIONS (OUTFALL 001) G.S. 143-
215.1(b)]
1. one year from the effective date of the permit, on Month day, 2022, the Permittee shall submit to the
Division of Water Resources a Corrective Action Plan summarizing the actions or strategy to be taken to
achieve compliance with the copper limits at outfall 001. Specific dates for completion or
implementation of each action shall be included.
2. Within two years from the effective date of the permit, on Month day, 2022,the Permittee shall identify
sources of the pollutant and evaluate source reduction alternatives. The Permittee shall submit a report to
the Division summarizing actions taken in accordance with the Corrective Action Plan.
3. Within three years from the effective date of the permit,on Month day,2022,the Permittee shall achieve
compliance with copper limits specified in Section A.(1).
Page 9of11

Permit No.NC0026689
Upon approval of the Corrective Action Plan by the Division,the report and actions 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 in excess of four months will be subject to public notice.
A. (6) COMPLIANCE SCHEDULE FOR BIS (2-ETHYLHEXYL) PHTHALATE
LIMITATIONS(OUTFALL 001) [G.S. 143-215.1(b)]
1. Within one year from the effective date of the permit,on Month day,2022,the Permittee shall submit to
the Division of Water Resources a Corrective Action Plan summarizing the actions or strategy to be taken
to achieve compliance with the bis (2-ethylhexyl) phthalate limits at outfall 001. Specific dates for
completion or implementation of each action shall be included.
2. Within two years from the effective date of the permit, on Month day,2022,the Permittee shall identify
sources of the pollutant and evaluate source reduction alternatives. The Permittee shall submit a report to
the Division summarizing actions taken in accordance with the Corrective Action Plan.
3. Within three years from the effective date of the permit,on Month day,2022,the Permittee shall achieve
compliance with bis(2-ethylhexyl)phthalate limits specified in Section A.(1).
Upon approval of the Corrective Action Plan by the Division,the report and actions 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 in excess of four months will be subject to public notice.
Page 10 of 11

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Denton WWTP- NC0026689 ✓►' Facility „,
Town of Denton -Davidson County
Location
Receiving Stream:Lick Creek Stream Class:WS-IV (not to scale)
Drainage Basin:Yadkin Pee-Dee River Stream Segment: 12-126-(3)
Permitted Flow:0.8 MGD Subbasin: 03-07-08
Outfall 001: 35°37'27.0" N,80°09'17.0" W USGS Quad: High Rock Latitude:35°37'15.4"N Longitude:80°07'36.4"W