NC0089893_Draft Permit_20200408

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ROY COOPER ofi, '�
y Governor ... ":
MICHAEL S.REGAN
Secretary
S.DANIEL SMITH NORTH CAROLINA
Director Environmental Quality
April 08,2020
Mr. John Shutak
Union County Public Works
500 N. Main Street, Ste 600
Monroe,North Carolina 28112
Subject: Draft NPDES Permit
NC0089893
Yadkin River WTP
Union County
Dear Mr. Shutak:
Enclosed with this letter is a copy of the Draft NPDES permit the proposed Yadkin River Water
Treatment Plant discharge. We have reviewed your application and supplements submitted by
your authorized consultants CDM Smith. The Engineering Alternatives Analysis(EAA)
submitted concludes that discharge to surface waters is the most viable option. After our review
of this document the Division concurs with its conclusion.
Please review this draft carefully to ensure thorough understanding of the requirements and
conditions it contains.
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 latest version is available at
https://bit.ly/2BZ4xxx 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 Union County area, soliciting public comments on this draft permit.
Please provide any written comments you may have to the following: NCDEQ/DWR, NPDES
Permitting Branch, 1617 Mail Service Center, Raleigh, NC 27699-1617 no later than 30 days
after receipt of this draft permit.
Following the 30-day public comment period,the Division will review all pertinent comments
and take appropriate action prior to issuing a final permit. If you have questions concerning this
draft permit, please call me at [phone] or by email at [e-mail].
Sincerely,
��
Lae_
Emily DelDuco, Environmental Specialist
NPDES Complex Permitting Unit
Hardcopy:NPDES Files
Ecopy: Laserfiche
DWR/Mooresville Regional Office/Water Quality/Cory Basinger
DWR/Operator Certification Program/Maureen Kinney
DWR/Aquatic Toxicology Branch
CDM Smith/Kelly Boone
DEQ' 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
NORR CAROL INA
° a!^w^^^— /"� 919.707.9000

NPDES Permit NC0089893
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENTAL QUALITY
DIVISION OF WATER RESOURCES
PERMIT
TO DISCHARGE WASTEWATER UNDER THE
NATIONAL POLLUTANT DISCHARGE EIAWIATION 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
Union County Public Works
is hereby authorized to discharge treated wastewater from a facility known as
Yadkin River Water Treatment Plant (WTP)
3522 New Salem Rd, Unionville
Union County
to receiving waters designated as UT to Richardson Creek, within the Yadkin-Pee Dee 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 2020.
This permit and the authorization to discharge shall expire at midnight on
Signed this day
S.Daniel Smith,Director
Division of Water Resources
By Authority of the Environmental Management Commission
Page 1 of 8

NPDES Permit NC0089893
SUPPLEMENT TO PERMIT COVER SHEET
Union County Public Works
is hereby authorized to:
1. Upon completion of construction and notification to the Division of Water Resources before start-up,
operate a conventional technology water treatment plant [coagulation, flocculation, sedimentation, and
filtration] with discharge of wastewaters from media filter backwash and sedimentation basins with a
design potable flowrate of 13 MGD and a maximum, monthly average wastewater discharge of 0.47
MGD. This facility is located at the Yadkin River Water Treatment Plant (WTP) (3522 New Salem
Road) in Union County,with water and wastewater treatment that includes the following components;
• Rapid mix
• Two (2) flocculation basins(3 mixers each)
• Two (2) sedimentation basins
• Chemical injection vault
• Four(4)GAC filters
• Finished water pump station (2 duty, 1 standby)
• Recycle pump station
• Two (2) HDPE-lined reclamation basins
2. Discharge from said treatment works via Outfall 001 at a location specified on the attached map,
into an Unnamed Tributary to Richardson Creek [Stream Segment 13-17-36-(5);HUC
030401050506], currently a Class C waterbody within Subbasin 03-07-14 of the Yadkin-Pee Dee
River Basin.
Page 2 of 8

NPDES Permit NC0089893
PART I
A. (1.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS
[15A NCAC 02B.0400 et seq., 02B.0500 et seq.]
(NOT YET CLASSIFIED)
During the period beginning on the effective date of this permit and upon approval of an Authorization to
Construct, and after submittal of the signed Engineering Certificate, and lasting until expiration, the Permittee
is authorized to discharge filter backwash via Outfall 001. Such discharges shall be limited and monitored' by
the Permittee as specified below:
EFFLUENT LIMITS MONITORING REQUIREMENTS 1
CHARACTERISTIC Monthly Daily Measurement Sample Sample
IEDMR CODES] Average Maximum Frequency Type Location
Flow(MGD) 50050 Continuous Recording Effluent
Total Suspended Solids(mg/L) C0530 30.0 mg/L 45.0 mg/L 2/month Grab Effluent
Turbidity(NTU) 00070 Monthly Grab Effluent
Total Residual Chlorine 2(µg/L) 50060 17 µg/L 2 2/month Grab Effluent
Not<6.0 or>9.0
pH(su) 00400 2/month Grab Effluent
standard units
Total Aluminum (mg/L) 01105 Quarterly Grab Effluent
Total Fluoride (mg/L) 00951 Quarterly Grab Effluent
Total Copper3 (µg/L) 01042 Quarterly Grab Effluent
Total Arsenic(µg/L) 01002 Quarterly Grab Effluent
Total Lead3(µg/L) 01050 Quarterly Grab Effluent
Total Zinc3 Quarterly Grab Effluent
Total Phosphorous(TP) (mg/L) C0665 Quarterly Grab Effluent
Total Nitrogen(TN)(mg/L) C0600 Quarterly Grab Effluent
Ammonia Nitrogen Monthly Grab Effluent
b TGP3 Grab Effluent
Chronic WET Testing B Quarterly
Hardness—Total as[CaCO3 or Ca+Mg)]' 00900 Monitor&Report Quarterly Grab Effluent
Hardness—Total as[CaCO3 or Ca+Mg)]° 00900 Monitor&Report Quarterly Grab Upstream
Footnotes:
1. The permittee shall submit discharge monitoring reports electronically using NC DWR's eDMR application system. See Special
Condition A.(4.).
2. The Division shall consider TRC effluent values reported below 50 µg/L to be compliant with the permit.However,the Permittee
shall continue to record and submit all values reported by a North Carolina-certified laboratory method(including field certified),
even if these values fall below 504L.
3. Effluent hardness sampling should be performed in conjunction with testing for hardness dependent metals(copper,lead,zinc)
4. 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
Pennittee 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.
5. Whole Effluent Toxicity(WET)testing-testing of Ceriodaphnia dubia shall be performed as 7-day pass/fail test at 90%effluent
concentration,during January,April,July and October[See A.(2.)].
Page 3 of 8

NPDES Permit NC0089893
Comments:
1.Samples shall be taken at the outfall but prior to mixing with the receiving waters.
2.There shall be no discharge of floating solids or foam in other than trace amounts.
A. (2.) CHRONIC TOXICITY PASS/FAIL MONITORING (QUARTERLY)
[15A NCAC 02B.0200]
The permittee shall conduct quarterly chronic toxicity tests using test procedures outlined in the "North
Carolina Ceriodaphnia Chronic Effluent Bioassay Procedure,"Revised December 2010, or subsequent
versions.
The effluent concentration defined as treatment two in the procedure document is 90%. The testing shall be
performed as a Ceriodaphnia dubia 7-day pass/fail test. 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.
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 TGP3B.
Additionally, DWR Form AT-1 (original) is to be sent to the following address:
Attention: North Carolina Division of Water Resources
Environmental Sciences Section
1621 Mail Service Center
Raleigh,N.C. 27699-1621
Or, results can be sent to the email, [e-mail].
Completed Aquatic Toxicity Test Forms shall be filed with the Environmental 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 and accurate and include all supporting chemical/physical measurements
performed in association with the toxicity tests,as well as all dose/response data. 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.
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.
Page 4 of 8

NPDES Permit NC0089893
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.
If the Permittee monitors any pollutant more frequently than required by this permit, the results of such
monitoring shall be included in the calculation&reporting of the data submitted on the DMR& all AT Forms
submitted.
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.) REPORTING REQUIREMENTS AFTER COMMENCEMENT OF DISCHARGE
In accordance with 40 CFR 122.21(k)(5)(vi), no later than 2 years after the commencement of discharge from
the proposed facility the applicant is required to complete and submit items V and VI of NPDES application
Form 2C. Please note that all data generated must be reported to the approved detection level or lower
reporting level of the procedure. Practical Quantitation Limit levels can be found on the DWR website at:
https://deq.nc.gov/about/divisions/water-resources/water-resources-data/water-sciences-home-
page/microbiology-inorganics-branch/methods-pqls-qa. Two copies of items V and VI of NPDES application
Form 2C shall be submitted to:
Attention: North Carolina Division of Water Resources
Wastewater Branch/NPDES
1617 Mail Service Center
Raleigh,North Carolina 27699-1621
A. (4.) ELECTRONIC REPORTING OF 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.
Page 5 of 8

NPDES Permit NC0089893
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. Until such time that the state's eDMR application
is compliant with EPA's Cross-Media Electronic Reporting Regulation(CROMERR), permittees will be
required to submit all discharge monitoring data to the state electronically using eDMR and will be
required to complete the eDMR submission by printing, signing, and submitting one signed original and a
copy of the computer printed eDMR 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
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 mailing address above. 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 21,2020, 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: http://www2.epa.gov/comliance/final-national-pollutant-discharge-elimination-system-
npdes-e lectronic-report ing-rule.
Page 6 of 8

NPDES Permit NC0089893
Electronic submissions must start by the dates listed in the"Reporting Requirements" section above.
i
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.) (d)l
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."
Page 7 of 8

NPDES Permit NC0089893
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 8 of 8

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Yadkin River Water Treatment Plant
NPDES Permit NC0089893 ,,5.000.000
Receiving Stream:UT to Richardson Creek Stream Class:C
Stream Segment: 13-17-36-(5) Sub-Basin#:03-07-14
River Basin:Yadkin-Pee Dee HUC:030401050506 SCALE 35.0631°N, -80.4417°W
County:Union 1:15,000