NC0026271_Draft Permit_20200408

d
ROY COOPER %'' .;
Governor \N
MICHAEL S.REGAN
Secretary *4, t0*
S.DANIEL SMITH NORTH CAROLINA
Director Environmental Quality
April 8,2020
Mr. David Odom
Town of Taylorsville
204 Main Ave Dr SE
Taylorsville,N.C. 28681
Subject: DRAFT NPDES PERMIT NC0026271
Taylorsville WWTP
Grade III Biological WPCS [15A NCAC 08G .0302]
Alexander County
Dear Mr.Odom:
Enclosed with this letter is a copy of the draft permit for your facility. Please review the draft very
carefully to ensure thorough understanding of the conditions and requirements it contains. Your
permit is among several in the Catawba River Basin that the Division has targeted for expedited
renewal.
This draft contains the following changes from the existing permit:
• Regulatory citations for permit requirements have been added throughout the permit.
• The language in section A.(3.)has been updated to be consistent with the finalization
of federal requirements for electronic reporting.
• Review of eDMR data showed no potential for chlorides,zinc, and cyanide to exceed
water quality standards. Monitoring for these parameters has been removed from the
permit.
• Review of data also showed limited potential for copper to exceed water quality
standards. The requirement to monitor for copper will remain in the permit, but
monitoring frequency has been reduced to quarterly.
• Ammonia Nitrogen(NH3-N) Monitoring—In the current permit you monitor 2
times per month for NH3-N and'have and have a summer effluent limit of 18 mg/L
(monthly average) and 35 mg/L (weekly average). Monitoring is required at the
same frequency year round, but there is no current limit during winter months
(November—March). Recent review by Division staff has noted that I5A NCAC
2B .0404(c)requires that winter waste load allocations for oxygen consuming waste
be no less stringent than 2 times the summer waste load limit. To meet this rule
requirement winter limits for NH3-N are being added to the permit.
A review of the monitoring data over the permit cycle indicates that no NH3-N
value has exceeded 10.4 mg/L. In accordance with the rule and results from the
mass balance review, the winter limit can be set by doubling the summer limit.
Based on this, the new winter monthly average limit is 19 mg/L. The Division has
historically set NH3-N limits no higher than 35 mg/L. Winter NH3-N limits for the
permit will be set at 35 mg/L for the weekly average.
DEQ North Carolina Department of Environmental Quality I Division of Water Resources
'J55l2 North Salisbury Street 11617 Mail Service Center I Raleigh,North Carolina 27699-I617
o.wmm.ma=...^dia+\ /` 919.707.9000

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. The latest version is available at https://bit.ly/2BZ4xxx 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 Alexander 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 via email at [[e-mail]] or call 919-707-9125.
Sincceerely,
ijaC2a._
Emily DelDuco
Environmental Specialist II
NPDES Program
cc: NPDES files
ec: Mooresville Regional Office
DWR Public Water Supply-Clinton Cook
Page 2 of 2

Permit NC0026271
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 Taylorsville
is hereby authorized to discharge wastewater from a facility located at
Town of Taylorsville WWTP
344 Minnigan Lane, Taylorsville
Alexander County
to receiving waters designated as Lower Little River in the Catawba 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 March 31, 2025.
Signed this day
S.Daniel Smith, Director
Division of Water Resources
By Authority of the Environmental Management Commission
Page 1 of 7

Permit NC002627I
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.
Town of Taylorsville
is hereby authorized to:
1. continue operating an existing 0.830 MGD wastewater treatment plant located at the
Taylorsville Wastewater Treatment Plant(WWTP)(Taylorsville, Alexander County)utilizing
the following treatment units:
o post-headworks lift station(with appurtenant yard piping)
• dual pumps(2 each 2.5 MGD)
• flow-vortex grit separator(peak 2.5 MGD)
• lime-slurry feed system(pH /alkalinity control)
o flow-splitter box
o dual(2)aeration basins
o dual(2) secondary clarifiers
o dual(2)chlorine contact chambers
o dechlorination
o five(5) each aerobic sludge digesters
o effluent monitoring device and sample port
o effluent piping [- 2.75 stream miles] to the Lower Little River
gxpph//
2. discharge from said treatment works via Outfall 001, at the location specified on the attached
map, into Lower Little River [Stream Segment 11-55-(5.5)],a waterbody currently classified
WS-IV within subbasin 03-08-32 [HUC: 030501011003]of the Catawba River Basin.
Page 2 of 7

Permit NC0026271
Part I
A. (1.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS
[NCAC 02B.0400 et seq., 02B.0500 et seq.]
Grade III Biological 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 treated wastewater from Outfall 001. Such discharges shall be
limited, monitored and reported' by the Permittee as specified below:
EFFLUENT CHARACTERISTICS LIMITS MONITORING REQUIREMENTS
[eDMR Codes] Monthly Weekly Daily Measurement Sample Sample
Average Average Max Frequency Type Location
Flow 50050 0.830 MGD Continuous RecordingInfluent or
Effluent
Influent&
BOD,5-day,20°C 2 C0310 30.0 mg/L 45.0 mg/L 3/Week Composite Effluent
Total Suspended Solids 2 C0530 30.0 mg/L 45.0 mg/L 3/Week Composite Influent&
Effluent
NH3-N(Summer 3) C0610 9.5 mg/L 28.5 mg/L 3/Week Composite Effluent
NH3-N(Winter 3) C0610 19 mg/L 35 mg/L Weekly Composite Effluent
Fecal Cofrform 31616 200/100 ml 400/100 ml 3/Week Grab Effluent
Temperature 00010 3/Week Grab Effluent
pH 00400 Not<6.0 or>9.0 standard Units 3/Week Grab Effluent
Conductivity 00094 3/Week Grab Effluent
Total Residual Chlorine 4 50060 28 pig/4 3/Week Grab Effluent
Copper 01042 Quarterly Composite Effluent
Total Nitrogen C0600 Quarterly Composite Effluent
(NO2-N+NO3-N+TKN)
Total Phosphorus C0665 Quarterly Composite Effluent
Chronic Toxicity 5 TGP38 Quarterly Composite Effluent
Footnotes:
1. The Permittee shall submit discharge Monitoring Reports electronically using NCDWR's eDMR submittal system[See Section A.
(3•)1•
2. The monthly average effluent BOD5 and Total Suspended Residue concentrations shall not exceed 15%of the
respective influent value(i.e.85%removal required).
3. Summer=April 1 through October 31;Winter=November 1 through March 31.
4. The Division shall deem compliant all effluent TRC values reported below 501..ig/L.However,the Permittee shall
continue to record and submit all levels detected by a North Carolina-certified test methods(including field certified),
even if these values fall below 50µg/L.
5. Chronic Toxicity(Ceriodaphnia)at 8.2%:January,April,July,&October [see Section A.(2.)].
Condition: The Permittee shall discharge no floating solids or foam.
Page 3 of 7

Permit NC0026271
A. (2.) CHRONIC TOXICITY(QUARTERLY)—LIMITED
[G.S. 143-215.1(b)]
The effluent discharge shall at no time exhibit observable inhibition of reproduction or significant
mortality to Ceriodaphnia dubia at an effluent concentration of 8.2%.
The permit holder shall perform at a minimum, quarterly monitoring using test procedures outlined in
the"North Carolina Ceriodaphnia Chronic Effluent Bioassay Procedure,"Revised February 1998, or
subsequent versions or"North Carolina Phase II Chronic Whole Effluent Toxicity Test Procedure"
(Revised-February 1998)or subsequent versions. The tests will be performed during the months of
January,April,July and October.. Effluent sampling for this testing shall be performed at the
NPDES permitted fmal 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-February 1998)or subsequent versions.
The chronic value for multiple concentration tests will be determined using the geometric mean of the
highest concentration having no detectable impairment of reproduction or survival and the lowest
concentration that does have a detectable impairment of reproduction or survival. The defmition of
"detectable impairment,"collection methods, exposure regimes, and further statistical methods are
specified in the"North Carolina Phase II Chronic Whole Effluent Toxicity Test Procedure"(Revised-
February 1998)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,North Carolina 27699-1621
Completed Aquatic Toxicity Test Forms shall be filed with the Water Sciences Section/Aquatic
Toxicology Branch 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 Environmental Sciences Section at the address cited above.
Page 4 of 7

Permit NC0026271
Should the Permittee fail to monitor during a month in which toxicity monitoring is required,
monitoring will be required during the following 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.) 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
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
Raleigh, North Carolina 27699-1617
See "How to Request a Waiver from Electronic Reporting" section below.
Page 5 of 7

Permit NC0026271
Regardless of the submission method, the first DMR is due on the last dayof the month followingthe
g
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, 2020,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-
pollutant-discharge-elimination-system-npdes-electronic-reporting-ru le
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/edi>>r
Page 6 of 7

Permit NC0026271
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 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. (6.11
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 7 of 7

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Town of Taylorsville Alf"
Taylorsville WWTP Location
State Grid: D14NW USGS Quad: Taylorsville,NC not to scale
Receiving Stream: Lower Little River Stream Class: WS-IV
Drainage Basin: Catawba River Basin Segment Number: 11-69-(5.5)
Latitude: 35°52'45"N Sub-Basin: 03-08-32 NPDES Permit NC0026271
Longitude: 81°12'16"W HUC: 03050101 North
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Alexander County