NC0030473_Draft Permit_20221018

•ROY COOPER , j� `
Governor ®E
ELIZABETH S.BISER
Secretary
RICHARD E.ROGERS,JR. NORTH CAROLINA
Director Environmental Quality
October 18,2022
Water Quality Lab and Operations, Inc.
ATTN: Paul Isenhour
P.O. Box 1167
Banner Elk,NC 28604
Subject: Draft NPDES Permit NC0030473
Mill Ridge Development WWTP
Grade II Biological WPCS
Watauga County
Dear Permittee:
The Division has reviewed your request to renew the subject permit. Enclosed with this letter is a copy of the draft
permit for your facility. 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. (2)to require electronic submission of
effluent data. Federal regulations require electronic submittal of all discharge monitoring reports(DMRs).
2. The facility grade has been added in Section A. (1).
3. Instream monitoring for turbidity has been added in Section A. (1)per 15A NCAC 02B.0211 (21).
4. Daily effluent limit for dissolved oxygen has been updated in Section A.(1)to be no less than 6.0 mg/L
per 15A NCAC 02B.0211 (6).
5. An updated outfall map has been included.
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 Watauga County area,per EPA requirements. Please provide your
comments,if any,to me at the address below 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 at siying.chenAncdenr.gov.
Sincerely,
citi CiLkv,
Siying Chen
Environmental Specialist
NPDES Compliance and Expedited Permitting Unit
D E Q North Carolina Department of Enfl„,,,,,---
vironmental Qua I visi
512 North Salisbury Street I1611 Mail Service Center I DiRaleighon of.NorWaterth Carolina Resources 27699.1617
la,O .d a,i.,io W OaM\ /./ 9I9.707.9000

cc: NPDES File[Laserfiche]
NC DEQ Winston-Salem Regional Office[email]
Operator Certification Program[email]
Mill Ridge Property Owners Association—Penny Hodge[[e-mail]]
DE Q� North Carolina Department of Environmental Quality I Division of Water Resources
512 North Salisbury Street 11611 Mail Service Center I Raleigh,North Carolina 27699-1617
o.-.—, i wwr` r 919.707.9000

NPDES Permit NC0030473
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
Mill Ridge Property Owners' Association
is hereby authorized to discharge wastewater from a facility located at the
Mill Ridge Development WWTP
229 Clubhouse Drive
Banner Elk
Watauga County
to receiving waters designated as the Watauga River in the Watauga 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 September 30,2027.
If the permittee intends to continue to discharge at the facility beyond the term of this permit, a
renewal application must be submitted no later than April 3, 2027(180 days before the expiration of
this permit).
Signed this day
Richard E. Rogers,Jr.
Director, Division of Water Resources
By Authority of the Environmental Management Commission
Page 1 of 6

NPDES Permit NC0030473
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.
Mill Ridge Property Owners' Association
is hereby authorized to:
1. continue to operate an existing 0.052 MGD dual-train wastewater treatment system that includes the
following components:
• influent bar screen
• duplex grinder pumps
• flow splitter weir box
• two aeration basins
• dual-hopper bottom clarifiers
• sludge return air lifts
• skimmer return air lifts
• aerated sludge holding basin
• tertiary treatment unit consisting of dual-cell filtration system
• clear well
• filter backwash pumps
• mud well
• ultraviolet disinfection system
• continuous recording flow measuring device
• automatically activated standby power generator
located at the Mill Ridge Development WWTP, 229 Clubhouse Drive, Banner Elk in Watauga
County; and
2. discharge from said treatment works via Outfall 001, at the location specified on the attached map
into the Watauga River [stream index 8-(1)], currently classified B; Tr, HQW waters with Subbasin
04-02-01 [HUC 060101030301] in the Watauga River Basin.
Page 2 of 6

NPDES Permit NC0030473
PART I
A. (1.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS
[15A NCAC 02B .0400 et seq., 02B .0500 et seq.]
Grade WW-2 Water Pollution Control System [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 from outfall 001. Such discharges shall be limited, monitored and reported'
by the Permittee as specified below:
EFFLUENT LIMITS MONITORING REQUIREMENTS,
CHARACTERISTIC Monthly Daily Measurement Sample Sample
[PARAMETER CODES] Average Maximum Frequency Type Location,
Flow(MGD) 50050 0.052 MGD Continuous Recorder I or E
BOD 5-day(20°C)(mg/L) C0310 6.0 mg/L 9.0 mg/L Weekly Composite E
(April
1 —October 31)
BOD,5-day(20°C)(mg/L) C0310 10.0 mg/L 15.0 mg/L Weekly Composite E
(November 1 —March 31)
Total Suspended Solids(mg/L) C0530 10.0 mg/L 15.0 mg/L Weekly Composite E
NH3 as N(mg/L) C0610 3.9 mg/L 19.5 mg/L Weekly Composite E
(April 1 —October 31)
NH3 as N(mg/L) C0610 4.0 mg/L 20.0 mg/L Weekly Composite E
(November 1 —March 31)
Dissolved Oxygen (DO)(mg/L) 00300 Daily average>6.0 mg/L Weekly Grab E
Dissolved Oxygen (DO)(mg/L) 00300 Monitor&Report Weekly Grab U&D
Fecal Coliform(#/100mL)s 31616 200/100 mL 400/100 mL Weekly Grab E
(geometric mean)
Temperature(°C) 00010 Monitor&Report Weekly Grab E, U&D
Total Nitrogen (mg/L) C0600 Monitor&Report Semi-Annually Composite E
(NO2+NO3+TKN)
Total Phosphorus(mg/L) C0665 Monitor&Report Semi-Annually Composite E
pH(su) 00400 Not<6.0 nor>9.0 Weekly Grab E
Standard Units
Turbidity 00070 Monitor&Report Weekly Grab U& D
Footnotes:
1. The Permittee shall submit discharge Monitoring Reports electronically using the Division's eDMR
submittal system [See Section A. (2.)].
2. I= Influent; E= Effluent;U =upstream,at least 100 feet upstream from the outfall; D=downstream,
approximately 0.1 mile downstream from the outfall.
3. Fecal Coliform shall be calculated using the geometric mean,according to the procedure detailed in Part II.
Section A.
Conditions:
• There shall be no discharge of floating solids or visible foam in other than trace amounts.
Page 3 of 6

NPDES Permit NC0030473
A. (2.) ELECTRONIC REPORTING OF MONITORING REPORTS
[NCGS 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)l
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.
Monitoring results obtained during the previous month(s) shall be summarized for each month and
reported via the eDMR system no later than the last calendar day of the month following the
completed reporting period. 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:
Page 4 of 6

NPDES Permit NC0030473
• 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 5/10/22/2015-24954/national-pol lutant-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.)
fsil
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.
Page 5 of 6

NPDES Permit NC0030473
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
submitted. Based on myin ui ofthe person or
properly gather and evaluate the informationu q n7
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.)l
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 6 of 6

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Mill Ridge Development WWTP ' v R
NPDES Permit NC0030473 �"'����gr��>iL`��,
229 Clubhouse Drive, Banner Elk *,� �����/��+�� 1�
receiving Stream: Watauga River Stream Class: B-Trout r ��•�` ,,
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tream Segment: 8-(1) HQW „,,
Facility Location
liver Basin: Watauga Sub-Basin #: 04-02-01 Scale Watauga County la'
:ounty: Watauga HUC: 060101030301 1:24,000 Outfall 001: 36°09'18"N,81°46'24"W
IJSGS Quad:Valle Cruces