NC0046345_Draft Permit_20210511

47
ROY COOPER tb 1j.+/ ..� ),{
Governor „ j"
DIONNE DELLI-GATTI
Secretary
S.DANIEL SMITH NORTH CAROLINA
Director Environmental Quality
May 11, 2021
Chris Phillips, Interim City Manager
City of Reidsville
230 W Morehead Street
Reidsville, NC 27320
Subject: Draft NPDES Permit NC0046345
Reidsville WTP
Grade I Physical Chemical WPCS
Rockingham County
Dear Permittee:
The Division has reviewed your request to renew the subject permit. Please review this draft carefully to
ensure your thorough understanding of the information, conditions, and requirements it contains.
The draft permit includes the following significant changes from the existing permit:
1. Language has been updated in Section A. (1)and Section A. (5)to require electronic submission
of effluent data. Federal regulations require electronic submittal of all discharge monitoring
reports (DMRs).
2. Outfall map has been updated.
3. Language on the Supplement to Permit Cover Sheet has been updated.
4. The components list has been updated on the Supplement to Permit Cover Sheet.
5. Units of measure added in Section A. (1).
6. The facility grade has been added in Section A. (1).
7. Turbidity monitoring frequency has been reduced in Section A. (1)per the current water
treatment plant strategy.
8. Limits have been updated for total copper and monitoring increased to monthly in Section A. (1)
based on a reasonable potential to exceed water quality standards.
9. Limits have been added for total zinc and total fluoride in Section A. (1)and monitoring has
been increased to monthly based on a reasonable potential analysis.
10. A compliance schedule has been added as Section A. (4) for the new total copper,total fluoride,
and total zinc limits in Section A. (1).
11. Monitoring for iron has been removed in Section A. (1) as there is no longer a water quality
standard.
12. Monitoring for total hardness has been added in Section A. (1)per the current water treatment
plant guidance.
13. Updated the footnotes in Section A. (1).
14. Toxicity test in Section A. (2) has been updated due to a history of failed toxicity tests.
D E Q' North Carolina Department of Environmental Quality I Division of Water Resources
512 North Salisbury Street 11617 Mail Service Center I Raleigh,North Carolina 27699-1617
aEV+ +O\r" 919.707.9000

Please note that the practical quantitation limits (PQLs) for Total Copper is 2 µg/L,and the PQL for
Total Zinc is 10 µg/L(per the Inorganic Chemistry Branch of the Division of Water Resources Water
Sciences Section) and monitoring data should be reportable down to these levels. Review of DMR data
indicates parameters are being consistently reported in incorrect units.Limits for water treatment plants
are determined by evaluating DMR data submitted to the Division, along with a dilution factor(if
applicable) and the maximum monthly average flow reported in the previous 3 years at the time the
review is completed.
Please note that the receiving stream is listed as impaired for dissolved oxygen on the North Carolina
2018 303(d) Impaired Waters List.Addressing impaired waters is a high priority with the Division,and
instream data will continue to be evaluated. If there is noncompliance with permitted effluent limits and
stream impairment can be attributed to your facility,then mitigative measures may be required.
The EPA approved NC 2015-2019 Water Quality Standard(WQS)Triennial Review includes new
chronic and acute dissolved metal standards for most metals. Further,the freshwater standards for
several metals are expressed as the dissolved form of the metals,and seven metals have hardness-
dependent equations.As a result,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 hardness and instream hardness sampling, upstream of the
discharge, have been added to the permit at a monitoring frequency of quarterly. See Section A. (1)
Effluent Limitations and Monitoring Requirements.
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.
With this notification,the Division will solicit public comment on this draft permit by publishing a
notice in newspapers having circulation in the general Rockingham County area, per EPA requirements.
Please provide your comments,if any,to me no later than 30 days after receiving 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 the draft, please
contact me at 919-707-3619,or via e-mail [[e-mail]].
Sincerely,
Brianna Young
NPDES Compliance an Expedited Permitting Unit
cc: NPDES Files(Laserfiche)
Winston-Salem Regional Office
Wastewater Operator Certification Group
WSS/Aquatic Toxicology Branch
DWR/Public Water Supply

Permit NC0046345
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENTAL QUALITY
DIVISION OF WATER RESOURCES
PERMIT
TO DISCHARGE WASTEWATER UNDER THE
NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM
(NPDES)
In compliance with the provisions of North Carolina General Statute 143-215.1,other lawful standards
and regulations promulgated and adopted by the North Carolina Environmental Management
Commission, and the Federal Water Pollution Control Act, as amended,the
City of Reidsville
is hereby authorized to discharge wastewater from a facility located at the
Reidsville WTP
278 Reid Lake Road
Reidsville
Rockingham County
to receiving waters designated as an unnamed tributary to Troublesome Creek in subbasin 03-06-01 in
the Cape Fear 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
This permit and authorization to discharge shall expire at midnight on April 30,2026.
Signed this day
S.Daniel Smith
Director,Division of Water Resources
By Authority of the Environmental Management Commission
Page 1 of 10

Permit NC0046345
SUPPLEMENT TO PERMIT COVER SHEET
All previous NPDES Permits issued to this facility,whether for operation or discharge are hereby
revoked,and as of this 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.
The City of Reidsville
is hereby authorized to:
I. Continue to discharge treated filter backwash wastewater from a conventional water treatment plant.
This water treatment plant currently has a design potable flowrate of 9.0 MGD,with a maximum,
monthly average wastewater discharge of approximately 0.385 MGD. The facility is located at the
Reidsville WTP at 278 Reid Lake Road,Reidsville, in Rockingham County. Water and wastewater
treatment consists of:
• Filtration
• Two(2) 650,000 gallon sludge settling lagoons
• Sludge drying bed
• Dechlorination
• Chemical usage consists of:
o Aluminum sulfate
o Potassium permanganate
o Polymer
o Sulfuric acid
o Caustic soda
o Chlorine
o Fluoride
o Phosphate
o Ammonia
o Calcium thiosulfate
2. Discharge from said treatment works via Outfall 002,at the location specified on the attached map
into an unnamed tributary to Troublesome Creek [Stream Segment: 16-6-(3)],a waterbody currently
classified WS-V;NSW in subbasin 03-06-01 [HUC: 030300020203] in the Cape Fear River Basin.
Page 2 of 10

Permit NC0046345
PART I.
A. (1) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS
[15A NCAC 02B.0400 et seq., 15A NCAC 02B.0500 et seq.]
Grade I Physical Chemical WPCS [I5A NCAC 08G .0302]
Beginning with the effective date of this permit and lasting until expiration, the Permittee is authorized
to discharge treated wastewater from Outfall 002. Such discharges shall be limited and monitored by
the Permittee as specified below:
EFFLUENT LIMITATIONS MONITORING REQUIREMENTS
EFFLUENT CHARACTERISTICS
Parameter Code Monthly Daily Measurement Sample Sample
Average Maximum Frequency Type Location
Flow(MGD) 50050 Monitor&Report Continuous Recording Effluent
Total Suspended Solids C0530 30.0 mg/L 45.0 mg/L Weekly Grab Effluent
pH 00400 >6.0 s.u.and <9.0 s.u. Weekly Grab Effluent
Total Residual Chlorine 2 50060 17 pg/L Weekly Grab Effluent
Turbidity(NTU) 00070 Monitor&Report 2/Month Grab Effluent
Total Aluminum(pg/L) 01105 Monitor& Report Quarterly Grab Effluent
Total Copper 3 00010 9.42 pg/L 12.75 pg/L Monthly Grab Effluent
Total Manganese(pg/L) 01055 Monitor&Report Quarterly Grab Effluent
Total Fluoride 3 00951 1,800 pg/L Monthly Grab Effluent
Total Zinc 3 01092 151.2 pg/L 150,0 pg/L Monthly Grab Effluent
Total Nitrogen(mg/L) C0600 Monitor&Report Quarterly Grab Effluent
(NO2+NO3+TKN)
Total Phosphorus(mg/L) C0665 Monitor&Report Quarterly Grab Effluent
Hardness—Total as a 00900 Monitor&Report Quarterly Grab Effluent
[CaCO3 or(Ca+Mg)] (mg/L)
Hardness—Total as 00900 Monitor&Report Quarterly Grab Upstream
[CaCO3 or(Ca+Mg)]5(mg/L)
Ammonia Nitrogen(mg/L) C0610 Monitor&Report Quarterly Grab Effluent
Whole Effluent Toxicity TGP3B Monitor&Report Quarterly Grab Effluent
Monitoring 6
Footnotes:
1. The permittee shall submit discharge monitoring reports electronically using the NC DWR's eDMR
application system [see Section A.(5)].
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Permit NC0046345
2. The Division shall consider all effluent TRC values reported below 50 µg/1 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.
3. See Section A.(4)for compliance schedule.
4. Effluent hardness sampling should be performed in conjunction with testing for hardness dependent metals
(copper and zinc).
5. The Permittee shall sample instream hardness,upstream of the facility's discharge.The sample shall be
representative of the hardness in the receiving stream.If the Permittee is a member of the Monitoring
Coalition Program,sampling for instream hardness may be waived as long as the Monitoring coalition agrees
to sample hardness at the nearest upstream location,at a minimum frequency of quarterly,and the Permittee
has obtained approval from DWR-NPDES Permitting Unit that the upstream station being monitored by the
Coalition is representative of the receiving stream for this discharge.The Permittee is responsible for
submitting instream hardness test results with its permit renewal application package.If Coalition
membership is cancelled or the Coalition terminates instream hardness sampling at the approved station,the
Permittee will immediately notify the Division and resume sampling for instream hardness,upstream of its
discharge.
6. Chronic Toxicity Limit P/F(Ceriodaphnia dubia)at 90.0%during the months of January,April,July,and
October[see Section A.(2)]. - •.
THERE SHALL BE NO DISCHARGE OF FLOATING SOLIDS OR VISIBLE FOAM IN OTHER
THAN TRACE AMOUNTS.
44F
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Page 4 of 10

Permit NC0046345
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
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 II Chronic Whole
Effluent Toxicity Test Procedure"(Revised-December 2010,or subsequent versions).
All toxicity testing results required as part of this permit condition will be entered 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:
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.
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Permit NC0046345
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.
A. (3) PERMIT RE-OPENER: WHOLE EFFLUENT TOXICITY
[G.S. 143-215.1(b)]
Whole Effluent Toxicity monitoring results indicating aquatic toxicity may result in the Division of
Water Resources re-opening this permit or requesting by letter that further action be taken. Additional
metals testing, a toxicity identification evaluation, a toxicity reduction evaluation, and/or an assessment
of discharge treatment alternatives may be requested.
A.(4) SCHEDULE OF COMPLIANCE(OUTFALL 001)
[G.S. 143-215.1(b)]
1. Within one year from the effective date of the permit 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 Total Copper,Total Fluoride,and Total Zinc 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 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 submit a report to the Division summarizing
actions taken in accordance with the Corrective Action Plan.
4. Within four years from the effective date of the permit submit a report to the Division summarizing
actions taken in accordance with the Corrective Action Plan.
5. Achieve compliance with Total Copper, Total Fluoride, and Total Zinc limits specified in Section A.
(1)within five years of the permit effective date.
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.
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Permit NC0046345
The Corrective Action Plan and reports shall include the owner's name, NPDES permit number and
Permittee contact person, and shall be submitted to:
(1)NCDEQ/Division of Water Resources (2)NCDEQ/Division of Water Resources
NPDES Compliance and Expedited Permitting Winston-Salem Regional Office
1617 Mail Service Center 450 West Hanes Mill Road, Suite 300
Raleigh,NC 27699-1617 Winston-Salem,NC 27105
A.(5) ELECTRONIC REPORTING-DISCHARGE MONITORING REPORTS
P.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.)(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 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
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Permit NC0046345
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.
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/2015/10/22/2015-
24954/national-pol lutant-discharge-el imination-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
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Permit NC0046345
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/edmr
4. Sisnatory Requirements FSunnlements Section B. (11.) (b) and Supersedes Section B. (11.) (d)1
All eDMRs submitted to the permit issuing authority shall be signed by a person described in Part II,
Section B. (11.)(a)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."
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Permit NC0046345
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
122.411
Page 10 of 10

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