NC0022730_Draft Permit_20180627

.4
ROY COOPER
(governor
MICHAEL S. REGAN
Secretary
M LINDA CULPEPPER
Water Resources bila un l)u c trn
ENVIRONMENTAL QUALITY
June 27, 2018
Mr. Robert Heaton
Public Utilities Director
403 Beech Mountain Parkway
Beech Mountain, North Carolina 28604
Subject: Draft NPDES Permit NC00222730
Grassy Gap Creek WWTP
Class WW-2
Watauga County
Dear Mr. Heaton:
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:
D Section A. (3)has been added to require electronic submission of effluent data. Federal regulations
require electronic submittal of all discharge monitoring reports(DMRs).
➢ Parameter Codes have been added to the effluent table.
➢ Regulatory citations have been added to Section A.
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 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 the telephone number or e-mail address listed at the bottom of this page.
Sincerely,
l� 1 �� �t L
Charles H.Weaver
NPDES Program
cc: NPDES Unit
1617 Mail Service Center,Raleigh,North Carolina 27699-1617 512 North Salisbury Street,Raleigh,North Carolina 27604
Phone: [phone]/FAX [phone]/Internet:www.ncwaterquality.org
[e-mail]
An Equal Opportunity/Affirmative Action Employer—50%Recycled/10%Post Consumer Paper

• "` Permit NC0022730
Class WW-2
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENTAL QUALITY
DIVISION OF WATER RESOURCES
PERMIT
TO DISCHARGE WASTEWATER UNDER THE
NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM
In compliance with the provision 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 Beech Mountain
is hereby authorized to discharge wastewater from a facility located at the
Grassy Gap Creek WWTP
204 Grassy Gap Creek Road
Beech Mountain
Watauga County
to receivingwaters designated as GrassyGapCreek in the Watauga River Basin in
g g
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, 2022.
Signed this day
Linda Culpepper, Interim Director
Division of Water Resources
By Authority of the Environmental Management Commission
Page 1 of 6

Permit NC002273V
Class WW-2
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.
The Town of Beech Mountain
is hereby authorized to:
1. Continue operation of an existing 0.08 MGD wastewater treatment system that
includes the following components;
• Influent bar screen
• Flow equalization
• Dual-path aeration basins and clarifiers
• Chlorine disinfection
• Dechlorination equipment
This facility is located at the Grassy Gap Creek WWTP (204 Grassy Gap Creek
Road, Beech Mountain) in Watauga County.
2. Discharge from said treatment works via outfall 002 at the location specified on
the attached map into Grassy Gap Creek (Stream Index 8-20-3-(2.5)), a waterbody
currently classified C-Trout waters in the Watauga River Basin.
Page 2 of 6

• Permit NC0022730
Class WW-2
PART I
A. (1) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS
[15A NCAC 02B .0400 et seq., 02B .0500 et seq.]
During the period beginning on the effective date of this permit and lasting until expiration,
the Permittee is authorized to discharge via Outfall 002. Such discharges shall be limited
and monitored' by the Permittee as specified below:
PARAMETER LIMITS MONITORING REQUIREMENTS
[PCS Code] Monthly Weekly Daily Measurement Sample
Average Average Maximum Frequency Type Sample Location
Flow 0.08 MGD Continuous Recording Influent or Effluent
[50050]
BOD, 5-day(20°C)2 30.0 mg/L 45.0 mg/L Weekly Composite Influent&Effluent
[00310]
Total Suspended Solids2 30.0 mg/L 45.0 mg/L Weekly Composite Influent&Effluent
[00530]
as N [00610] 11.0 mg/L 33.0 mg/L Weekly Composite Effluent
(April 1 —October 31)
as N [00610] Monitor and Report[mg/L] Weekly Composite Effluent
(November 1 —March 30)
Fecal Coliform [31616] 200/100 mL 400/100 mL Weekly Grab Effluent
(geometric mean)
Total Residual Chlorine3 28 pg/L 2/Week Grab Effluent
[50060]
Temperature(0C) Daily Grab Effluent
[00010]
Total Mercury' Monitor and Report[ng/L] 1/Permit Grab Effluent
[COMER]
Total Nitrogen [00600] Monitor and Report[mg/L] Semi-Annually Composite Effluent
(NO2+NO3+TKN)
Total Phosphorus Monitor and Report[mg/L1 Semi-Annually Composite Effluent
[00665]
pH
>6.0 and<9.0 standard units Weekly Grab Effluent
[0
[00400]
Notes:
1. The permittee shall submit discharge monitoring reports electronically using the
Division's eDMR system [see A. (3)].
2. The monthly average BODS and Total Suspended Solids concentrations shall not exceed
15% of the respective influent value (85% removal).
3. 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 pg/L.
4. Total mercury must be sampled once during the permit cycle [see A. (2)].
There shall be no discharge of floating solids or visible foam in other than trace amounts.
Page 3 of 6

Permit NC002273S
Class WW-2
A. (2) EFFLUENT MERCURY ANALYSIS
[G.S. 143-215.66]
The Permittee shall provide one effluent mercury analysis, using EPA method 1631E,
in conjunction with the next permit renewal application. The anaylsis should be
taken within 12 months prior to the application date. Any additional effluent
mercury measurements conducted from the effective date of this permit and up to the
application date shall also be submitted with the renewal application.
If the result of the mercury analysis is not provided with the application, the
application may be returned as incomplete and the Permittee considered non-
compliant.
A. (3) 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 [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. 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
Page 4 of 6

• Permit NC0022730
Class WW-2
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/compliance/final-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
Page 5 of 6

Permit NC0022730
Class WW-2
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:
https://deq.nc.gov/about/divisions/water-resources/edmr
4. Signatory Requirements [Supplements 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."
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 6 of 6

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NC0022730 - Grassy Gap Creek WWTP Facility
Latitude: 36° 13'02" N USGS Quad: Elk Park,N - Location
Longitude: 81°54'25" W
Receiving Stream Buckeye Creek
Stream Class: C-Trout Sub-Basin: 04-02-01 Noah_,g Watauga County
•Jv(�1j 1L, Map not to scale