NC0021890_Fact Sheet_20240603

DocuSign Envelope ID: 5A2B2B65-A511-4364-8598-7465FA87C2DA
NCDEQ / DWR / NPDES
EXPEDITED FACT SHEET - NPDES PERMIT RENEWAL
NPDES Permit NCO021890
Catherine Shadwell, Compliance & Expedited Permitting Unit / 919-707-3613 Jan 2024
FACILITY INFORMATION
Applicant/Facility Name
Town of Granite Falls (Randy Smith, Water Resources Director)
Town of Granite Falls Wastewater Treatment Plant
Facility Physical Address
60 Meandering Way Granite Falls, NC 28630
Mailing Address
P.O. Drawer 10 Granite Falls NC 28630
Permitted Flow (MGD)
0.900 MGD
Type of Waste
Municipal Wastewater Discharge, < 1 MGD
Facility Class
WW-3
County
Caldwell
Permit Status
Renewal
Regional Office
ARO
STREAM CHARACTERISTICS
Receiving Stream
Gunpowder Creek
Stream
Classification
WS-IV;CA
Stream Segment
11-55-(4)
Outfall Lat.
350 47' 49.9" N
7Q10 - Summer (cfs)
9.3
Outfall Long.
810 24' 38.2" W
7Q10 - Winter (cfs)
12
Drainage basin
Catawba
30Q2 (cfs)
—
Subbasin
03-08-32
Average Flow (cfs)
44
HUC
030501010803
IWC (%)
13.04% (summer) /
10.41 % (winter)
303(d) List
Not listed.
BASIC INFO FOR EXPEDITED PERMIT RENEWAL
Does permit need Daily Max NH3 limits?
Already present in permit
Does permit need TRC limits/footnote?
Already present in permit
Does permit have toxicity testing?
Yes, quarterly chronic toxicity testing (see notes under
comments on draftpermit)
Does permit have any Special Conditions?
No
Does permit have instream monitoring?
Yes, U&D for Dissolved Oxygen and Temp
New expiration date:
January 31, 2029
Facility Summary
Town of Granite Falls operates a Municipal Wastewater Discharge facility for the municipality which
serves about 5,000 residents. The Granite Falls Wastewater Treatment Plant is a minor facility (flow < 1
MGD) with a design capacity and permitted wastewater discharge of 0.900 MGD. The WWTP was
originally permitted in 1981. This facility utilizes the following treatment components:
• Aerated grit chamber with self cleaning bar screen
• Influent Parshall Flume with Ultrasonic flow meter
• Two (2) each oxidation ditches in parallel
• Two (2) each clarifiers, peripheral in parallel
• Gas chlorination
• Chlorine contact basin
• Dechlorination
• Cascade aeration
• Aerobic sludge digester, and
• Sludge drying beds with polymer feed system
Fact Sheet for Permit Renewal
Jan 2024 - NPDES Permit NCO021890 - Page 1

DocuSign Envelope ID: 5A2B2B65-A511-4364-8598-7465FA87C2DA
Renewal Summary
This renewal contains the following changes:
• Added the facility grade to Section A. (1.).
• Updated the effluent table in Section A. (1.) with updated eDMR parameter codes.
• Updated Section A. (3.) to reflect current federal requirements for Electronic Reporting of
Discharge Monitoring Reports.
• Updated outfall map
• Added winter NH3 limits to be within 2x of summer limits per 02B.0504
• Toxicity testing removed per guidance of the Aquatic Toxicity Branch (See comments below)
Compliance History
Looking back through 2019, Granite Falls Wastewater Treatment Plant has not received any enforcements,
or NOVs in the last 5 years. The most recent inspection (09/02/2020) found the facility to be well
maintained and operated, with no violations of the permit conditions.
Whole Effluent Toxicity (WET) Testing — IF PERMIT HAS TOXICITY TESTING
WET testing is required in this permit as freshwater Chronic [TGP3B] Pass/Fail Quarterly monitoring
with Ceriodaphnia dubia at an effluent concentration of 13%. This facility has passed 12 out of the past
12 toxicity tests. Testing has been removed from this permit since the facility discharges 100% domestic
discharge.
Comments on Draft Permit
- Winter NH3 limits should not exceed 2x summer limits per 02B.0504, recommended to update
winter limits to 12.4.
- Toxicity testing is not required since facility is 100% domestic — per Cindy Moore of the
Aquatic Toxicology Branch
Fact Sheet for Permit Renewal
Jan 2024 - NPDES Permit NCO021890 - Page 2

DocuSign Envelope ID: 5A2B2B65-A511-4364-8598-7465FA87C2DA
Public Notice
AFFP
North Carolina
Public Notice North Carolina
Environmental Management
Commission/NPDES Unit
Affidavit of Publication
1617 Mali Service Center
Raleigh, NC 27699-1617
Notice of Intent to Issue a NP-
DES Wastewater Permit
NC0021890 The Town of Gran -
STATE OF NC) SS
ite Falls WWTP The North Car -
COUNTY OF )
0ww
olina Environmental Manage-
ment Commission proposes to
Carolyn Setzer, being duly sworn, says: issue a NPDES wastewater dis-
charge permit to the personas)
That she is Sales of the Lenoir News Topic, a daily listed below. Written comments
newspaper of general circulation, printed and published in regarding the proposed permit
Lenoir, County, NC; that the publication, a copy of which will be accepted 30 days after
is attached hereto, was published in the said newspaper the pl *,)`Ilish date of this notice,
on the following dates: The Director of the NC Division
February 01, 2024 of Water Resources (DWR)
may hold a public hearing
should there be a significant
degree of public interest.
Please mail comments and/or
information requests to DWR at
the above address. Interested
That said newspaper was regularly issued and circulated persons may visit the DWR at
on those dates. 512 N. Salisbury Street,
SIGN : Raleigh, NC 27604 to review
the information on file. Addition-
AA14L — al information on NPDES per -
Sales 0 0 mits and this notice may be
Subscribed to and sworn to me this 1 st day of February f o u n d on o u r w e b s i t e;
2024. https://deq,nc.govlpublic-no-
tices-hearings,or by calling
[phone]. The Town of
Granite Falls [P.O, Drawer 10
Granite Falls, NC 28630] has
Michael C. Lambert Sr., NOTARY Burke, County, NC applied for renewal of permit
NCO021890 for Granite Falls
My commission expires: June 05, 2027,,.00, IlaMQ ��,e WWTP, Caldwell County. This
:��- .••• • •.F�j % permitted facility discharges
piARy '.`s treated domestic wastewater to
«Gunpowder Creek in the
=
Catawba River Basin. Cur-
00006166 70879300
PUB\-\Cj .* rently BOD 5-day, Ammonia
(NT) Wren Thedford '•�� (NH3 as N), dissolved oxygen,
NCD,� EO Division of Water Resources kC COV`,`� fecal coliform and total residual
1617 Mail Service Center chlorine ° o a'``4 chlorine are water -quality lim-
Raleigh, NC 27699 ited. This discharge may affect
future wasteload allocations in
this portion of the receiving
stream.
Feb. 1, 2024

DocuSign Envelope ID: 5A2B2B65-A511-4364-8598-7465FA87C2DA
IWC Calculations
Facility:Town of Granite Falls Wastewater Treatment Plant
Permit No.: NC0021890
Prepared By: Catherine Shadwell
Enter Design Flow (MGD): 0.9 <= Permitted Flow if Different from Design
Enter s7Q10 (cfs): 9.3
Enter w7Q10 (cfs): 12
Total Residual Chlorine (TRC)
Ammonia (Summer)
Daily Maximum Limit (ug/1)
Monthly Average Limit (mg NH3-N/1)
Design Permitted
Design Permitted
s7Q10 (CFS)
9.3
s7Q10 (CFS)
9.3
DESIGN FLOW (MGD)
0.9
DESIGN FLOW (MGD)
0.9 €
DESIGN FLOW (CFS)
1.395
DESIGN FLOW (CFS)
1.395
STREAM STD (UG/L)
17.0
STREAM STD (MG/L)
1.0
Upstream Bkgd (ug/1)
0
Upstream Bkgd (mg/1)
0.22
IWC (%)
13.04
IWC (%)
13.04
Allowable Conc. (ug/1)
130
Allowable Conc. (mg/1)
6.2
Ammonia (Winter)
Monthly Average Limit (mg NH3-N/1)
Design Permitted
Design Permitted
Fecal Coliform
w7Q10 (CFS)
12
Monthly Average Limit:
200/100ml € #VALUE!
DESIGN FLOW (MGD)
0.9
(If DF >331; Monitor)
DESIGN FLOW (CFS)
1.395
(If DF<331; Limit)
STREAM STD (MG/L)
1.8
Dilution Factor (DF)
7.67 #VALUE!
Upstream Bkgd (mg/1)
0.22
IWC (%)
10.41
Allowable Conc. (mg/1)
15.4
*2B .0404 (c) Applies
Total Residual Chlorine
1. Cap Daily Max limit at 28 ug/I to protect for acute toxicity
Ammonia (as NH3-N)
1. If Allowable Conc > 35 mg/l, Monitor Only
2. Monthly Avg limit x 3 = Weekly Avg limit (Municipals)
3. Monthly Avg limit x 5 = Daily Max limit (Non-Munis)
If the allowable ammonia concentration is > 35 mg/L, no limit shall be imposed
By Policy dischargers < 1 MGD get limits no lower than 2 & 4 due to BAT
* From 2B .0404(c) - Winter Limits can be no less stringent than 2 times the summer limits
Fecal Coliform
1. Monthly Avg limit x 2 = 400/100 ml = Weekly Avg limit (Municipals) = Daily Max limit (Non -Muni)

DocuSign Envelope ID: 5A2B2B65-A511-4364-8598-7465FA87C2DA
STATEo,.�
y T
ROY COOPER -
Governor
ELIZABETH S. BISER
Secretary #`Q_`^°`°'*
RICHARD E. ROGERS, JR. NORTH CAROLINA
Director Environmental Quality
January 17, 2024
MEMORANDUM
To: Kimberly Barnett
NC DEQ / DWR / Public Water Supply
Asheville Regional Office
From: Catherine Shadwell
NPDES Unit
Subject: Review of Draft NPDES Permit NCO021890
Granite Falls Wastewater Treatment Plant
Caldwell County
Please indicate below your agency's position or viewpoint on the draft permit and return this
form by February 17, 2024. If you have any questions on the draft permit, please contact
me at 919-707-3613 or via e-mail [[e-mail]].
RESPONSE: (Check one)
Concur with the issuance of this permit provided the facility is operated and maintained
Fv_1 properly, the stated effluent limits are met prior to discharge, and the discharge does not
contravene the designated water quality standards.
F-1
Concurs with issuance of the above permit, provided the following conditions are met:
F-1
Opposes the issuance of the above permit, based on reasons stated below, or attached:
Signed �a- Date:2024-02-19
North Carolina Department of Environmental Quality Division of Water Resources
512 North Salisbury Street 1617 Mail Service Center Raleigh, North Carolina 27699-1617
CICa1L1UALI111I11
NORTH CAHOLINAD_ E Q�)
oeaanmem 0 u.si

Permit
Facilitv
County
Region Outf,
Date Parameter
DocuSign Envelope ID: 5A2B2B65-A511-4364-8598-7465FA87C2DA
NG,,,,� 1�;,,, I WV.II — --11.E 1 Ul— - —ul1„- 1 U— 'VTP
Caldwell
Asheville 001
3/5/2019 TGP313 - Pass/Fail Static Renewal May Chronic Ceriodaphnia
NC0021890
Town of Granite Falls - Granite Falls WWTP
Caldwell
Asheville 001
3/7/2019 TGP3B - Pass/Fail Static Renewal May Chronic Ceriodaphnia
NC0021890
Town of Granite Falls - Granite Falls WWTP
Caldwell
Asheville 001
6/4/2019 TGP313 - Pass/Fail Static Renewal May Chronic Ceriodaphnia
NC0021890
Town of Granite Falls - Granite Falls WWTP
Caldwell
Asheville 001
6/6/2019 TGP3B - Pass/Fail Static Renewal May Chronic Ceriodaphnia
NC0021890
Town of Granite Falls - Granite Falls WWTP
Caldwell
Asheville 001
9/10/2019 TGP3B - Pass/Fail Static Renewal May Chronic Ceriodaphnia
NC0021890
Town of Granite Falls - Granite Falls WWTP
Caldwell
Asheville 001
9/12/2019 TGP313 - Pass/Fail Static Renewal May Chronic Ceriodaphnia
NC0021890
Town of Granite Falls - Granite Falls WWTP
Caldwell
Asheville 001
12/9/2019 TGP3B - Pass/Fail Static Renewal May Chronic Ceriodaphnia
NC0021890
Town of Granite Falls - Granite Falls WWTP
Caldwell
Asheville 001
12/12/2019 TGP313 - Pass/Fail Static Renewal May Chronic Ceriodaphnia
NC0021890
Town of Granite Falls - Granite Falls WWTP
Caldwell
Asheville 001
3/3/2020 TGP3B - Pass/Fail Static Renewal May Chronic Ceriodaphnia
NC0021890
Town of Granite Falls - Granite Falls WWTP
Caldwell
Asheville 001
3/5/2020 TGP313 - Pass/Fail Static Renewal May Chronic Ceriodaphnia
NC0021890
Town of Granite Falls - Granite Falls WWTP
Caldwell
Asheville 001
6/2/2020 TGP3B - Pass/Fail Static Renewal May Chronic Ceriodaphnia
NC0021890
Town of Granite Falls - Granite Falls WWTP
Caldwell
Asheville 001
6/4/2020 TGP313 - Pass/Fail Static Renewal May Chronic Ceriodaphnia
NC0021890
Town of Granite Falls - Granite Falls WWTP
Caldwell
Asheville 001
9/1/2020 TGP3B - Pass/Fail Static Renewal May Chronic Ceriodaphnia
NC0021890
Town of Granite Falls - Granite Falls WWTP
Caldwell
Asheville 001
9/3/2020 TGP313 - Pass/Fail Static Renewal May Chronic Ceriodaphnia
NC0021890
Town of Granite Falls - Granite Falls WWTP
Caldwell
Asheville 001
12/15/2020 TGP3B - Pass/Fail Static Renewal May Chronic Ceriodaphnia
NC0021890
Town of Granite Falls - Granite Falls WWTP
Caldwell
Asheville 001
12/17/2020 TGP313 - Pass/Fail Static Renewal May Chronic Ceriodaphnia
NC0021890
Town of Granite Falls - Granite Falls WWTP
Caldwell
Asheville 001
3/9/2021 TGP3B - Pass/Fail Static Renewal May Chronic Ceriodaphnia
NC0021890
Town of Granite Falls - Granite Falls WWTP
Caldwell
Asheville 001
3/11/2021 TGP313 - Pass/Fail Static Renewal May Chronic Ceriodaphnia
NC0021890
Town of Granite Falls - Granite Falls WWTP
Caldwell
Asheville 001
6/8/2021 TGP3B - Pass/Fail Static Renewal May Chronic Ceriodaphnia
NC0021890
Town of Granite Falls - Granite Falls WWTP
Caldwell
Asheville 001
6/10/2021 TGP313 - Pass/Fail Static Renewal May Chronic Ceriodaphnia
NC0021890
Town of Granite Falls - Granite Falls WWTP
Caldwell
Asheville 001
9/14/2021 TGP3B - Pass/Fail Static Renewal May Chronic Ceriodaphnia
NC0021890
Town of Granite Falls - Granite Falls WWTP
Caldwell
Asheville 001
9/16/2021 TGP313 - Pass/Fail Static Renewal May Chronic Ceriodaphnia
NC0021890
Town of Granite Falls - Granite Falls WWTP
Caldwell
Asheville 001
12/7/2021 TGP3B - Pass/Fail Static Renewal May Chronic Ceriodaphnia
NC0021890
Town of Granite Falls - Granite Falls WWTP
Caldwell
Asheville 001
12/9/2021 TGP313 - Pass/Fail Static Renewal May Chronic Ceriodaphnia
NC0021890
Town of Granite Falls - Granite Falls WWTP
Caldwell
Asheville 001
3/8/2022 TGP3B - Pass/Fail Static Renewal May Chronic Ceriodaphnia
NC0021890
Town of Granite Falls - Granite Falls WWTP
Caldwell
Asheville 001
3/10/2022 TGP3B - Pass/Fail Static Renewal May Chronic Ceriodaphnia
NC0021890
Town of Granite Falls - Granite Falls WWTP
Caldwell
Asheville 001
6/7/2022 TGP313 - Pass/Fail Static Renewal May Chronic Ceriodaphnia
NC0021890
Town of Granite Falls - Granite Falls WWTP
Caldwell
Asheville 001
6/9/2022 TGP3B - Pass/Fail Static Renewal May Chronic Ceriodaphnia
NC0021890
Town of Granite Falls - Granite Falls WWTP
Caldwell
Asheville 001
9/13/2022 TGP3B - Pass/Fail Static Renewal May Chronic Ceriodaphnia
NC0021890
Town of Granite Falls - Granite Falls WWTP
Caldwell
Asheville 001
9/15/2022 TGP3B - Pass/Fail Static Renewal May Chronic Ceriodaphnia
NC0021890
Town of Granite Falls - Granite Falls WWTP
Caldwell
Asheville 001
12/6/2022 TGP3B - Pass/Fail Static Renewal May Chronic Ceriodaphnia
NC0021890
Town of Granite Falls - Granite Falls WWTP
Caldwell
Asheville 001
12/8/2022 TGP3B - Pass/Fail Static Renewal May Chronic Ceriodaphnia
NC0021890
Town of Granite Falls - Granite Falls WWTP
Caldwell
Asheville 001
3/7/2023 TGP3B - Pass/Fail Static Renewal May Chronic Ceriodaphnia
NC0021890
Town of Granite Falls - Granite Falls WWTP
Caldwell
Asheville 001
3/9/2023 TGP3B - Pass/Fail Static Renewal May Chronic Ceriodaphnia
NC0021890
Town of Granite Falls - Granite Falls WWTP
Caldwell
Asheville 001
6/6/2023 TGP3B - Pass/Fail Static Renewal May Chronic Ceriodaphnia
NC0021890
Town of Granite Falls - Granite Falls WWTP
Caldwell
Asheville 001
6/8/2023 TGP3B - Pass/Fail Static Renewal May Chronic Ceriodaphnia
NC0021890
Town of Granite Falls - Granite Falls WWTP
Caldwell
Asheville 001
9/12/2023 TGP3B - Pass/Fail Static Renewal May Chronic Ceriodaphnia
NC0021890
Town of Granite Falls - Granite Falls WWTP
Caldwell
Asheville 001
9/14/2023 TGP3B - Pass/Fail Static Renewal May Chronic Ceriodaphnia

Param Class
Sample
UoM
Value
Location
Subbasin
DocuSign Envelope ID: 5A2B2B65-A511-4364-8598-7465FA87C2DA BIG
03-08-32
Na��IIQII
I
"111 IL
Biological
Composite
pass/fail
1
Effluent
03-08-32
Biological
Composite
pass/fail
1
Effluent
03-08-32
Biological
Composite
pass/fail
1
Effluent
03-08-32
Biological
Composite
pass/fail
1
Effluent
03-08-32
Biological
Composite
pass/fail
1
Effluent
03-08-32
Biological
Composite
pass/fail
1
Effluent
03-08-32
Biological
Composite
pass/fail
1
Effluent
03-08-32
Biological
Composite
pass/fail
1
Effluent
03-08-32
Biological
Composite
pass/fail
1
Effluent
03-08-32
Biological
Composite
pass/fail
1
Effluent
03-08-32
Biological
Composite
pass/fail
1
Effluent
03-08-32
Biological
Composite
pass/fail
1
Effluent
03-08-32
Biological
Composite
pass/fail
1
Effluent
03-08-32
Biological
Composite
pass/fail
1
Effluent
03-08-32
Biological
Composite
pass/fail
1
Effluent
03-08-32
Biological
Composite
pass/fail
1
Effluent
03-08-32
Biological
Composite
pass/fail
1
Effluent
03-08-32
Biological
Composite
pass/fail
1
Effluent
03-08-32
Biological
Composite
pass/fail
1
Effluent
03-08-32
Biological
Composite
pass/fail
1
Effluent
03-08-32
Biological
Composite
pass/fail
1
Effluent
03-08-32
Biological
Composite
pass/fail
1
Effluent
03-08-32
Biological
Composite
pass/fail
1
Effluent
03-08-32
Biological
Composite
pass/fail
1
Effluent
03-08-32
Biological
Composite
pass/fail
1
Effluent
03-08-32
Biological
Composite
pass/fail
1
Effluent
03-08-32
Biological
Composite
pass/fail
1
Effluent
03-08-32
Biological
Composite
pass/fail
1
Effluent
03-08-32
Biological
Composite
pass/fail
1
Effluent
03-08-32
Biological
Composite
pass/fail
1
Effluent
03-08-32
Biological
Composite
pass/fail
1
Effluent
03-08-32
Biological
Composite
pass/fail
1
Effluent
03-08-32
Biological
Composite
pass/fail
1
Effluent
03-08-32
Biological
Composite
pass/fail
1
Effluent
03-08-32
Biological
Composite
pass/fail
1
Effluent
03-08-32
Biological
Composite
pass/fail
1
Effluent
03-08-32
Biological
Composite
pass/fail
1
Effluent
03-08-32

DocuSign Envelope ID: 5A2B2B65-A511-4364-8598-7465FA87C2DA
ROY COOPER
Governor
ELIZABETH S. BISER
Secretary
RICHARD E. ROGERS, JR.
Director
Town of Granite Falls
Attn: Randy Smith, Water Resources Director
P.O. Drawer 10
Granite Falls, NC 28630
Dear Permittee,
NORTH CAROLINA
Environmental Quality
1 /23/2024
Subject: Draft NPDES Permit NCO021890
Town of Granite Falls Wastewater Treatment Plant
Grade III Biological WPCS
Caldwell County
The Division has reviewed your request to renew the subject permit. Please review this draft carefully to ensure a
thorough understanding of the information, conditions, and requirements it contains.
The draft permit includes the following significant changes from the existing permit:
• Section A. (2.) has been updated to require electronic submission of
effluent data reports (DMRs). Federal regulations require electronic
submittal of all discharge monitoring.
Per 02B.0504, winter NH3 limits were updated to be no greater than 2x the
summer limits, new winter NH3 limits will go into effect January 1, 2029.
An updated outfall map has been included.
Toxicity Test requirement was removed since Facility is 100%
domestic.
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 Caldwell 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
[phone] or via e-mail at kate.shadwellgdeq.nc. og_v.
Sincerely,
r
Catherine Shadwell
NPDES Compliance and Expedited Permitting
cc: NPDES File [Laserfiche]
Asheville Regional Office [Laserfiche]
rolo �'1 North Carolina Department of Environmental Quality I Division of Water Resources
,,, r - R E512 North Salisbury Street 1 1617 Mail Service Center I Raleigh, North Carolina 27699-1617
NORTH CAROL NA
�,�,M��w,�����iq�,�� �►f 919.707.9000

DocuSign Envelope ID: 5A2B2B65-A511-4364-8598-7465FA87C2DA
Permit NCO021890
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENTAL QUALITY
DIVISION OF WATER RESOURCES
190101101101
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 Contr ct, as amended,
Town of Granite
is hereby authorized to discharge wastew from a facility located at the
Granite Falls Wastewater Treatment Plant
60 derinj4&ay
anite 1
Cal j0Yl Coginty
to receiving waters desil
effluent limitations, mot
hereof.
This permit shall becom
.n the Catawba River Basin in accordance with
;onditions set forth in Parts I, II, III and IV
This permit and authorization to discharge shall expire at midnight on January 31, 2029.
Signed this day
John E. Hennessy, Section Chief Regional Operations
Division of Water Resources
By Authority of the Environmental Management Commission
Page 1 of 6

DocuSign Envelope ID: 5A2B2B65-A511-4364-8598-7465FA87C2DA
Permit NCO021890
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.
Town of Granite Falls
is hereby authorized to:
Continue to operate an existing 0.900 MGD wastewater treatment facility that includes the following
components:
• Aerated grit chamber with self-cleaning bar
• Influent Parshall Flume with Ultrasonic flow
• Two (2) each oxidation ditches in parallel
• Two (2) each clarifiers, peripheral in par
• Gas chlorination
• Chlorine contact basin
• Dechlorination
• Cascade aeration
• Aerobic sludge digester,
• Sludge drying beds wig
The facility is located at the Granite
Granite Falls) in Caldwell County.
Nor,
Wastewater Treatment Plant (60 Meandering Way,
2. Discharge from said treatment works via Outfall 001, at the location specified on the attached
map, into Gunpowder Creek, a waterbody currently classified WS-IV;CA [Stream Index: 11-55-
(4)] within subbasin 03-08-32 [HUC: 030501010803] of the Catawba River Basin.
Page 2 of 6

DocuSign Envelope ID: 5A2B2B65-A511-4364-8598-7465FA87C2DA
Permit NCO021890
PART I.
A. (1.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS
[15A NCAC 02B .0400 et seq., 02B .0500 et seq.]
Grade III Biological 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 and monitored' by the Permittee as
specified below:
Limits
Monitoring Requirements
Monthly
Weekly
Daily
Measureme
Sample
Sample
PARAMETERS
eDMR Code
Average
Average
Maximum
nt
Type
Location2
Frequency
Flow MGD
50050
0.900 MGD
Continuous
RecordingInfluent
or
Effluent
BOD, 200 C3
C0310
25.0 mg/L
37.5 mg/L
3/Week
Composite
Influent and
April 1-October 31
Effluent
BOD, 200 C3
C0310
30.0 mg/L
45.0 mg/L
3/Week
Composite
Influent and
November 1-March 31
Effluent
Total Suspended Solids3
C0530
30.0 mg/L
45.0 mg/
3/Week
Composite
Influent and
Effluent
NH3 as N
C0610
6.2 mg/L
18.6 mg/
3/week
Composite
Effluent
April 1 to October 31
NH3 as N
November 1 to March 31
C0610
15.4 mg/L
35.0 mg/L
3/week
Composite
Effluent
NH3 as N6
C0610
12.4 mg/L
35.0 mg/L
3/week
Composite
Effluent
November 1 to March 31
Fecal Coliform
31616
200/100 mL
400/100 mL
3/week
Grab
Effluent
(geometric mean
Dissolved Oxygen
00300
Not < 5.0 mg/L
3/week
Grab
Effluent
Dissolved Oxygen'
00300
Monitor and Report
Variables
Grab
Upstream &
Downstream
Total Residual Chlorine4
50060
28 pIg/L
3/Week
Grab
Effluent
TRC
pH
00400
> 6.0 and < 9.0 Standard Units
3/week
Grab
Effluent
Temperature °C
00010
Monitor and Report
3/week
Grab
Effluent
Temperature °C'
00010
Monitor and Report
Variables
Grab
Upstream &
Downstream
Conductivity
00094
Monitor and Report
3/Week
Grab
Effluent
Total Nitrogen
NO2+NO3+TKN
C0600
Monitor and Report
Quarterly
Composite
Effluent
Total Phosphorus
C0665
Monitor and Report
Quarterly
Composite
Effluent
Fnntnntec
1. The Permittee shall submit discharge monitoring reports electronically using the NC DWR's eDMR
system [see A. (2.)].
2. Sample locations: Upstream: approximately 50 feet above the discharge point, Downstream: approximately 500 feet
below the outfall.
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DocuSign Envelope ID: 5A2B2B65-A511-4364-8598-7465FA87C2DA
Permit NCO021890
3. The monthly average effluent BOD5 and Total Suspended Solids concentrations shall not exceed 15 percent of the
respective monthly average influent value (i.e., 85% removal required).
4. The facility shall monitor TRC when using chlorination for disinfection. The Division shall consider all effluent total
residual chlorine values reported below 50 µg/1 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.
5. Stream samples shall be collected 3/Week during summer months (June thru September) and 1/Week during the rest of
the year.
6. New winter ammonia limits put in place per 02B.0504 will go into effect January 1, 2029.
THERE SHALL BE NO DISCHARGE OF FLOATING SOLIDS OR
VISIBLE FOAM IN OTHER THAN TRACE AMOUNTS
A.(2.) ELECTRONIC REPORTING - DISCHARGE M
[G.S. 143-215.1 (b)]
Federal regulations require electronic submittal of all disc
The final NPDES Electronic Reporting Rule was adopted
NOTE: This special condition supplements or supersedes the fvii
(Standard Conditions for NPDES Permits):
• Section B. (11.) Signatory Require t
• Section D. (2.) Report' g%
• Section D. (6.) Re ords Retention
• Section E. (5.) Monitoring Reports
G REPORTS
) and program reports.
)er 21, 2015.
sections within Part II of this permit
The permittee shall re discharge nit'ig data electronically using the NC DWR's Electronic
Discharge Monitoring TWrt (eDMR tercet application.
Monitoring results obtained during t e previous month(s) shall be summarized for each month and submitted
monthly electronically using eD . 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:Hdeq.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
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DocuSign Envelope ID: 5A2B2B65-A511-4364-8598-7465FA87C2DA
Permit NC0021890
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:
• Sewer Overflow/Bypass Event Reports; and
• Pretreatment Program Annual Reports; and
• Clean Water Act (CWA) Section 316(b) Annual Reports.
The permittee may seek an electronic reporting waiver from the Divi ' (see "How to Request a Waiver
from Electronic Reporting" section below).
a. Electronic Submissions
In accordance with 40 CFR 122.41(1)(9), the permittee 6web
the snit cipient at the time of each
electronic submission. The permittee should use the Eresources to identify the initial recipient
for the electronic submission.
Initial recipient of electronic NPDES information NPDE lated facilities means the entity (EPA or
the state authorized by EPA to implement the NPDES program) t t is the designated entity for receiving
electronic NPDES data [see 40 CFR 127 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 &A how to access and use the appropriate electronic
reporting tool will be available as well. ipformation on EPA's NPDES Electronic Reporting Rule is found at:
https://www.federalregist 2015/10/22/2015-24954/national-pollutant-discharge-elimination-
system-npdes-electrons at -tin
Electronic submissions tart by4 dates listed in the "Reporting Requirements" section above.
b. 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:
Page 5 of 6

DocuSign Envelope ID: 5A2B2B65-A511-4364-8598-7465FA87C2DA
Permit NC0021890
http://deq.nc.gov/about/divisions/water-resources/edmr
c. 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 Il, Section
B. (11.)(a) or by a duly authorized representative of that person as described in Part 11, 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' j eDMR system shall make the
following certification [40 CFR 122.22]. NO OTHER STATEMENT CERTIFICATION WILL BE
ACCEPTED:
"I certify, under penalty of law, that this document and all at ments w repared under my direction or
supervision in accordance with a system designed to assur at qualified p nel properly gather and
evaluate the information submitted. Based on my inquir4 of the p n or persons who manage the system, or
those persons directly responsible for gathering the informatio e information submitted is, to the best of
my knowledge and belief, true, accurate, and complete. I am re that there are significant penalties for
submitting false information, including thepossibility offines prisonment for knowing violations. "
d. Records Retention [Supplements Section D. (5.uo"ftp
The permittee shall retain records
records or copies shall be maintaii
may be extended by request of the
Dis
a period of
Pr at any tii
toring Reports, including eDMR submissions. These
.east 3 years from the date of the report. This period
[40 CFR 122.41].
Page 6 of 6

DocuSign Envelope ID: 5A2B2B65-A511-4364-8598-7465FA87C2DA
0
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Hickory Blvd
(US Hwy 321)
��� � l �-� � • . � Gunpowder Creek `� ��• �"� "
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S. Main street
Town of Granite Falls
Granite Falls WWTP
Receiving Stream: Gunpowder Creek Stream Class: WS-IV; CA
Draninage Basin: Catawba River Basin Segment Number: 11-55-(4)
Latitude: 350 47' 50" N Sub -Basin: 03-08-32
Longitude: 810 24' 38" W HUC: 030501010803
. fit• %�/ �:—
Meandering Way
Outfa11001
(flows S)
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16
North11 NPDES Permit NC0021890
Caldwell County