NC0075965_Draft Permit_20210511

ROY COOPER 4 -4?-
Governor i� ,`'
DIONNE DELLI-GATTI
Secretary
S.DANIEL SMITH NORTH CAROLINA
Director Environmental Quality
May 11, 2021
Theresa Coletta, Mayor
Town of Burnsville
PO Box 97
Burnsville, NC 28714-0097
Subject: Draft NPDES Permit NC0075965
Burnsville WTP
Grade I Physical Chemical WPCS
Yancey County
Dear Mayor Coletta:
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. (3)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. The facility grade has been added in Section A. (1).
6. Monitoring for duration of discharge has been added in Section A. (1)per the current water
treatment plant guidance.
7. Monitoring for turbidity has been added in Section A. (1)per the current water treatment plant
guidance.
8. Limit for total residual chlorine has been updated in Section A. (1)per the waste load allocation.
9. Limits have been added for total copper and total zinc in Section A. (1)based on a reasonable
potential to exceed water quality standards. A compliance schedule has been added as Section A.
(3).
10. potential analysis.
11. Monitoring for total iron and total manganese have 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 language in Section A. (2)has been updated.
Q— North Carolina Department of Environmental Quality I Division of Water Resources
'og 512 North Salisbury Street 1 1617 Mail Service Center I Raleigh,North Carolina 27699-1617
Noah+CAROUNAD—�
Nerlowt el Enykyorronsi m\ /'' 919.707.9000

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 Yancey 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)
Asheville Regional Office
Wastewater Operator Certification Group
WSS/Aquatic Toxicology Branch

Permit NC0075965
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
Town of Burnsville
is hereby authorized to discharge treated wastewater from a facility known as
Burnsville Water Treatment Plant(WTP)
690 Reservoir Road
Burnsville
Yancey County
to receiving waters designated as an unnamed tributary to Little Crabtree Creek in the French Broad
River Basin, in accordance with effluent limitations, monitoring requirements,and other applicable
conditions set forth in Parts I, II, III, and IV hereof.
The permit shall become effective
This permit and the authorization to discharge shall expire at midnight on February 28,2026.
Signed this day
S.Daniel Smith
Director, Division of Water Resources
By Authority of the Environmental Management Commission
Page 1 of 9

Permit NC0075965
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 described herein.
The Town of Burnsville
is hereby authorized to:
1. Continue to operate a conventional water treatment plant with discharge of wastewaters from
media filter backwash and sedimentation basins. This facility has a design potable flowrate of
1.0 MGD and a maximum, monthly average wastewater discharge of 0.26 MGD.This facility is
located at the Burnsville Water Treatment Plant, 690 Reservoir Road in Burnsville in Yancey
County. Water and wastewater treatment consists of:
• Flash mixer
• Flocculation
• Sedimentation
• Filtration
• 250,000 gallon clearwell
• 2 million gallon storage tank
• Sand filter tank(for chlorine and solids removal from wastewater before discharge)
• Chemical usage consists of:
o Chlorine
o Polyaluminum chloride
o Sodium bicarbonate
o Orthopolyphsophate
2. Discharge from said treatment works via Outfall 001 at a location specified on the attached map,
into an unnamed tributary to Little Crabtree Creek [Stream Segment: 7-2-52-33], a waterbody
currently classified C;Trout waterbody in subbasin 04-03-06 [HUC: 060101080202] of the
French Broad River Basin.
Page 2 of 9

Permit NC0075965
PART I
A. (1) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS
[15A NCAC 02B .0400 et seq., 02B .0500 seq.]
Grade I Physical Chemical WPCS [15A NCAC 08G .0302]
During the period beginning on the effective date of this permit and lasting until expiration, the
Permittee is authorized to discharge filter backwash via Outfall 001. Such discharges shall be
limited, monitored and reported' by the Permittee as specified below:
LIMITS MONITORING REQUIREMENTS
EFFLUENT CHARACTERISTIC
Parameter Codes Monthly Daily Measurement Sample Sample
Average Maximum Frequency Type Location
Flow(MGD) 50050 2/Month Instantaneous Effluent
Duration of Discharge(Hours) 81381 2/Month Instantaneous Effluent
Total Suspended Solids C0530 30.0 mg/L 45.0 mg/L 2/Month Grab Effluent
pH 00400 Not<6.0 s.u.or>9.0 s.u. 2/Month Grab Effluent
Total Residual Chlorine 2 50060 20 pg/L 2/Month Grab Effluent
Effluent
Turbidity(NTU)3 00070 2/Month Grab Upstream
Downstream
Total Copper 4 01042 9.25 pg/L 12.03 pg/L Monthly Grab Effluent
Total Zinc 4 148.7 pg/L 144.4 pg/L Monthly Grab Effluent
Hardness—Total ass 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)]6(mg/L)
Acute Toxicity Monitoring 7 TGA3B Quarterly Grab Effluent
Footnotes:
1. The permittee shall submit discharge monitoring reports electronically using the NC DWR's eDMR
application system[see Section A.(4)].
2. The Division shall consider all effluent TRC 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..
3. Effluent turbidity shall not exceed 10 NTUs or cause the natural background turbidity to be increased. If
the effluent exceeds 10 NTUs the Permittee shall take an upstream and downstream measurement of
turbidity and demonstrate that the natural background turbidity,measured upstream of the discharge,is
not increased.All samples(upstream,downstream,and effluent)shall be taken within the same 24-hour
period.NTU—Nephelometric Turbidity Unit.
4. See Section A. (3)for compliance schedule.
5. Effluent hardness sampling should be performed in conjunction with testing for hardness dependent
metals(copper).
6. 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
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Permit NC0075965
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.
7. Acute Toxicity Pass/Fail 48 hour static test(Ceriodaphnia dubia)at 90%effluent during the months of
January,April,July,and October[see Section A. (2)].
All samples collected should be of a representative discharge.
There shall be no discharge of floating solids or foam visible in other than trace amounts.
Page 4 of 9

Permit NC0075965
A. (2) ACUTE TOXICITY PASS/FAIL MONITORING (QUARTERLY)
[15A NCAC 02B .0500 et seq.]
The permittee shall conduct acute toxicity tests on a quarterly basis using protocols defined in the
North Carolina Procedure Document entitled"Pass/Fail Methodology For Determining Acute
Toxicity In A Single Effluent Concentration"(Revised December 2010, or subsequent versions).
The monitoring shall be performed as a Ceriodaphnia dubia 48-hour static test.The effluent
concentration at which there may be at no time significant acute mortality is 90 % (defined as
treatment two in the procedure document).Effluent samples for self-monitoring purposes must be
obtained during representative effluent discharge below all waste treatment. 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.
All toxicity testing results required as part of this permit condition will be entered electronically
using the Division's eDMR system for the month in which it was performed, using the parameter
code TGA3B.Additionally,DWR Form AT-2 (original) is to be sent to the following address:
North Carolina Division of Water Resources
Water Sciences Section/Aquatic Toxicology Branch
1621 Mail Service Center
Raleigh,NC 27699-1621
Or,results can be sent to the email,ATForms.ATBna,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,then
monthly monitoring will begin immediately. Upon submission of a valid test,this monthly test
requirement will revert to quarterly in the months specified above.
Should any test data from either these monitoring requirements or tests performed by the North
Carolina Division of Water Resources indicate potential impacts to the receiving stream,this permit
may be re-opened and modified to include alternate monitoring requirements or limits.
Should it be determined by the North Carolina Division of Water Resources that the facility's
discharge frequency and duration enable chronic sampling according to either the North Carolina
Ceriodaphnia Chronic Whole Effluent Toxicity Procedure or to Section 8.3, in Methods EPA-821-
R-02-013,the permit may be re-opened and modified to include chronic toxicity tests.
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Permit NC0075965
NOTE: Failure to achieve test conditions as specified in the cited document, such as minimum
control organism survival and appropriate environmental controls, shall constitute an invalid test
and will require immediate follow-up testing to be completed no later than the last day of the month
following the month of the initial monitoring.
A. (3) 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 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 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.
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 Asheville Regional Office
1617 Mail Service Center 2090 U.S. 70 Highway
Raleigh,NC 27699-1617 Swannanoa,NC 28778
A. (4) ELECTRONIC REPORTING - DISCHARGE 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
Page 6 of 9

Permit NC0075965
1. Reporting Requirements [Supersedes Section D. (2.) and Section E. (5.) (a)I
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
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
Page 7 of 9

Permit NC0075965
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-pollutant-
discharge-elimination-system-npdes-electronic-reporting-rule
Electronic submissions must start by the dates listed in the"Reporting Requirements"section
above.
3. How to Request a Waiver from Electronic Reporting
The permittee may seek a temporary electronic reporting waiver from the Division. To obtain
an electronic reporting waiver, a permittee must first submit an electronic reporting waiver
request to the Division. Requests for temporary electronic reporting waivers must be submitted
in writing to the Division for written approval at least sixty(60)days prior to the date the
facility would be required under this permit to begin submitting monitoring data and reports.
The duration of a temporary waiver shall not exceed 5 years and shall thereupon expire. At
such time,monitoring data and reports shall be submitted electronically to the Division unless
the permittee re-applies for and is granted a new temporary electronic reporting waiver by the
Division. Approved electronic reporting waivers are not transferrable. Only permittees with an
approved reporting waiver request may submit monitoring data and reports on paper to the
Division for the period that the approved reporting waiver request is effective.
Information on eDMR and the application for a temporary electronic reporting waiver are found
on the following web page:
http://deq.nc.gov/about/divisions/water-resources/edmr
4. Signatory Requirements [Supplements Section B. (11.) (b) and Supersedes Section B. (11.)
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 certifi,, 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,
Page 8 of 9

Permit NC0075965
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 9 of 9

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NPDES Permit NC0075965 A aerikt lrON �*IRWat ,��„f��
Facility Location j
Receiving Stream:UT to Little Crabtree Creek scale not shown W;��
Stream Segment:7-2-52-33 Stream Class:C;Tr ION
River Basin:French Broad Sub-Basin#:04-03-06 SCALE
USGS Quad:Burnsville
County:Yancey HUC:060101080202 1:24,000 35.91028°,-82.29083°