NC0077763_Permit Issuance_20150810

A
r_ A
NCDENR
North Carolina Department of Environment and Natural Resources
Pat McCrory
Governor
Mr. Barry Webb
City Manager
205 N Tenth St
Belmont, NC 28012
Dear Mr. Webb:
Donald R. van der Vaart
Secretary
August 10, 2015
Subject: Issuance of NPDES Permit NCO077763
Belmont WTP
Gaston County
Class PC-1
Division personnel have reviewed and approved your application for renewal of the subject permit.
Accordingly, we are forwarding the attached NPDES discharge permit. This permit is issued pursuant to
the requirements of North Carolina General Statute 143-215.1 and the Memorandum of Agreement between
North Carolina and the U.S. Environmental Protection Agency dated October 15, 2007 (or as subsequently
amended).
This final permit includes no major changes from the draft permit sent to you on June 3,
2015. Please note that the segment of the Catawba River to which your facility discharges is listed as an
impaired waterbody on the North Carolina 303(d) Impaired Waters List. Addressing impaired waters is a
high priority with the Division, and instream data will continue to be evaluated. If there is noncompliance
with permit effluent limits and stream impairment can be attributed to your facility, then mitigative
measures may be required.
If any parts, measurement frequencies or sampling requirements contained in this permit are
unacceptable to you, you have the right to an adjudicatory hearing upon written request within thirty (30)
days following receipt of this letter. This request must be in the form of a written petition, conforming to
Chapter 150B of the North Carolina General Statutes, and filed with the Office of Administrative Hearings
(6714 Mail Service Center, Raleigh, North Carolina 27699-6714). Unless such demand is made, this
decision shall be final and binding.
Please note that this permit is not transferable except after notice to the Division. The Division may
require modification or revocation and reissuance of the permit. This permit does not affect the legal
requirements to obtain any other Federal, State, or Local governmental permit that may be required. If you
have any questions concerning this permit, please contact Charles Weaver at telephone number (919) 807-
6391.
inc ely,
ZX
S. Jay Zimmerman, or
Division of Water Resources
cc: Central Files
Mooresville Regional Office
NPDES Unit
1617 Mail Service Center, Raleigh, North Carolina 27699-1617 512 North Salisbury Street, Raleigh, North Carolina 27604
Phone: [phone] / FAX [phone] / http://podal.ncdenr.org/web/wq
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Permit NCO077763
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES
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
City of Belmont
is hereby authorized to discharge wastewater from a facility located at the
Belmont WTP
301 North Tenth Street
Belmont
Gaston County
to receiving waters designated as the Catawba River in subbasin 03-08-34 of 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 September 1, 2015.
This permit and authorization to discharge shall expire at midnight on July 31, 2020.
Signed this day August 10, 2015
(J�7c
Sesion
Zimmerman, Director
of Water Resources
By Authority of the Environmental Management Commission
Page 1 of 7

Permit NCO077763
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 City of Belmont is hereby authorized to:
1. Continue to operate a conventional water treatment plant (with surface water source
water) with a discharge of wastewaters from filter -backwash wastewater and
sedimentation basins, which are settled in a clarifier prior to discharge The water
treatment plant has a design potable flow rate of 10 MGD and a monthly wastewater
discharge of ca.. 0.075 MGD. This facility is located at the Belmont WTP (205 North
Tenth Street, Belmont) in Gaston County.
2. Discharge from said treatment works at the location specified on the attached map into
the Catawba River, classified WS-IV & B CA waters in the Catawba River Basin.
Page 2 of 7

Permit NCO077763
Part I
A. (1) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS
[15A NCAC 02B.0400 et seq., 15A NCAC 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 from outfall 001. Such discharges shall be limited and
monitored' by the Permittee as specified below:
PARAMETER'
LIMIT S
MONITORING REQUIREMENTS
[PCS Code].
Monthly
Daily
Measurement
Sample Type
Sample
Averse
Maximum
Frequency
Location
Flow
50050
2/ Month
Instantaneous2
Effluent
Total Suspended Solids
00530
30.0 mg/L
45.0 mg/L
2/ Month
Grab
Effluent
Turbidity
00070
Month' y
Grab
U & D 3
Total Copper
01042
Quarterly
Grab
Effluent
Total Zinc
01092
Quarter' y
Grab 4
Effluent
Total Manganese
01055
Quarter' y
Grab 4
Effluent
Total Fluoride
[00951
Quarterly
Grab 4
Effluent
Total Residual Chlorine (TRC)4
[50060]
28 µg/L
2/ Month
Grab 5
Effluent
Effluent Toxicity 6
[Whole
[TGP3B]
Quarterly
Grab
Effluent
Footnotes.
1. No later than 270 days from the effective date of this permit, the permittee shall begin submitting
discharge monitoring reports electronically using the Division's eDMR system [see A. (3)] .
2. The duration of discharge flow must be reported.
3. Upstream is at least 100 feet upstream of the outfall. Downstream is at least 100 feet below the outfall.
4. Parameter should be sampled in conjunction with quarterly Toxicity testing.
5. Limit and monitoring apply only if chlorine or chlorine derivatives are used for disinfection. The
Division shall consider all effluent TRC values reported < 50 µg/L to be in compliance with the permit.
However, the Permittee shall record and submit all values reported by a North Carolina certified
laboratory (including field certified), even if these values fall below 50 µg/L.
6. Whole Effluent Toxicity (Ceriodaphnia dubia) at 0.33% with testing in March, June, September, and
December [see A. (2)].
All samples must be collected from a typical discharge event.
There shall be no discharge of floating solids or visible foam in other than trace amounts.
Page 3 of 7

Permit NCO077763
A. (2) CHRONIC TOXICITY MONITORING (Quarterly)
[15A NCAC 02B.0500 et seq.]
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 0.33%. The
testing shall be performed as a Ceriodaphnia dubia 7-day pass/fail test. The tests will be
performed during the months of March, June, September, and December. 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 on the Effluent
Discharge Monitoring Form (MR-1) 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: NC DENR / DWR
Water Sciences Section/Aquatic Toxicology Branch
1623 Mail Service Center
Raleigh, NC 27699-1623
Completed Aquatic Toxicity Test Forms shall be filed with the Water 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 Water 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.
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
Page 4 of 7

Permit NCO077763
testing to be completed no later than the last day of the month following the month of the initial
monitoring.
Page 5 of 7

Permit NCO077763
A. (3) ELECTRONIC REPORTING OF DISCHARGE MONITORING REPORTS
[NCGS 14M15.1 (b)]
Proposed federal regulations require electronic submittal of all discharge monitoring reports
(DMRs) and specify that, if a state does not establish a system to receive such submittals, then
permittees must submit DMRs electronically to the Environmental Protection Agency (EPA). The
Division anticipates that these regulations will be adopted and is beginning implementation.
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 (Suuersedes Section D. (2.) and Section E. (5.) (a)1
Beginning no later than 270 days from the effective date of this permit, the permittee shall
begin reporting 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 DENR / Division of Water Resources / Information Processing Unit
ATTENTION: Central Files / eDMR
1617 Mail Service Center
Raleigh, NC 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.
Requests for temporary waivers from the NPDES electronic reporting requirements 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 using eDMR. Temporary
waivers shall be valid for twelve (12) months and shall thereupon expire. At such time, DMRs
shall be submitted electronically to the Division unless the permittee re -applies for and is
granted a new temporary waiver by the Division.
Page 6 of 7

Permit NCO077763
Information on eDMR and application for a temporary waiver from the NPDES electronic
reporting requirements is found on the following web page:
http://portal. ncdenr.ory/web/wq/admin/bog/ipu/edmr
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.
2. Signatory Re uirements [Supplements Section B. 11. b and su ersedes Section B.
11. d
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://Dortal.ncdenr.ory/web/wq/admin/bog/ipu/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."
3. Records Retention [Supplements Section D. (6.)]
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

NCO077763 - BeLmont WTP Facility ti
Location
Latitude: 35'14'27' Longitude: 8lOU59"
USGS Quad: Belmont, N.C. Subbasin: 03-08-34
Stream Class: WS-IV & B CA Gaston County
Receiving Stream: Catawba River A I ;;il Gaston
not to scale

PUBLIC NOTICE
North Carolina
Environmental
Management
Commission /
NPDES Unit
1617 Mail Service
Center
Raleigh, NC
27699-1617
Notice of Intent
to Issue a
NPDES
Wastewater
Permit
The North Carolina Envi
water discharge permit to
the pTools'
listed below.
Written comments regard-
ing the proposed permit
of
Of
should there be a signin-
cant degree of public inter-
est. Please mail comments
and/or information re-
quests to DWR at the
above address. Interested
persons may visit the DWR
at 512 N. Salisbury Street,
Raleigh, NC to review in-
formation on file. Additional
information on NPDES
permits and this notice
may be found on our
website: htto'//oortal.
ncclamr.org/wate1w,310viii
o4nodes/c lendar, or by
calling [phone].
City of Belmont requested
renewal of NPDES permit
NC0077763/Belmont
WTP/Gaston County. Fa-
cility discharges to the Ca-
tawba River/Catawba
River Basin. Currently, to-
tal residual chlorine is
water quality limited.
1 C-June 5, 2015
AFFIDAVIT OF INSERTION OF ADVERTISMENT
The Gaston Gazette
Gastonia, N.C.
Gaston County
The Gaston Gazette does certify that the advertisement for:
NPDES Wastewater Permit, NC0077763/Belmont WTP/Gaston County
Measuring 7.35 inches appeared in The Gaston Gazette, a newspaper published in
Gaston County, Gastonia, N.C., in issue(s):
06/05/2015.
Name of Account: NCDENR/DWQ/NPDES
Order Number: 54564043
Ad Number: 54664271
Text GS564043 to 56654 Sworn to, and subscribed before me this 5 th day of June, 2015.
NOTARY
PUBS/C
Lisa A. Cjle, Notary Public
My Commission Expires April 25, 2017

NCDENR
North Carolina Department of Environment and Natural Resources
Pat McCrory, Governor
June 3, 2015
MEMORANDUM
To: Dr. Keri B. Cantrell
NC DENR / DWR / Public Water Supply
Mooresville Regional Office
From: Charles H. Weaver, Jr.
NPDES Unit
Subject: Review of Draft NPDES Permit NCO077763
Belmont WTP
Gaston County
Donald R. van der Vaart, Secretary
Please indicate below your agency's position or viewpoint on the draft permit and return this
form by July 6, 2015. If you have any questions on the draft permit, please contact me at
the telephone number or e-mail address listed at the bottom of this page.
RESPONSE: (Check one)
ElConcur with the issuance of this permit provided the facility is operated and maintained
properly, the stated effluent limits are met prior to discharge, and the discharge does not
contravene the designated water quality standards.
Concurs with issuance of the above permit, provided the following conditions are met:
PWS Section acknowledees that this is a renewal to an existine Dermit, and that the Belmont WTP has not
actively discharged their backwash water since connecting to the local WWTP. This permit is serving as a
"backup" measure. Should discharging become active again, we request procedures be enacted so as not to
directly impact the raw water intake located in the immediate vicinity.
❑ Opposes the issuance of the above permit, based on reasons stated below, or attached:
Sianed ��� Date:6/3/2015
1617 Mail Servioe Center, Raleigh, North Carolina 27699-1617 919 807-6391 (fax) 919 807-6489
VISIT US ON THE INTERNE!@HTTP://PORTAL.NCDENR.ORGIWEB/WD chadesmeaver@ ncdenr.gov
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Catawba River Basin
2014 AU Number: AU Name: AU Length Area: AU Uniis: Classification:
AU Description:
11-(75) CATAWBA RIVER (Lake Norman below elevation 76 31,331.6 FW Acres WS-IV,B;CA
From Lyle Creek to Cowan's Ford Dam
tCategory:
ACS:
Parameter Of Interest:
Collection Year:
303(d) yr:
i
EC
PCB Fish Tissue Advisory (Advisory, FC, NC)
2012
2014
11-(117) CATAWBA RIVER (Lake Wylie below elevation 570) 375.3 FW Acres WS-IV;CA
From Mountain Island Dam to Interstate Highway 85 Bridge at Belmont
2Category:
ACS:
Parameter Of Interest:
Collection Year:
303(d) yr:
i
EC
PCB Fish Tissue Advisory (Advisory, FC, NC)
2012
2014
11-(122) CATAWBA RIVER (Lake Wylie below elevation 570) 601.1 FW Acres WS-IV,B;CA
From 1-85 bridge to the upstream side of Paw Creek Arm of Lake Wylie, Catawba River
ICategory:
ACS:
Parameter Of Interest:
Collection Year:
303(d) yr:
i
EC
PCB Fish Tissue Advisory (Advisory, FC, NC)
2012
2014
11-(114) CATAWBA RIVER (Mountain Island Lake below elev 1,937.1 FW Acres WS-IV,B;CA
From Water Intake at River Bend Steam Station to Mountain Island Dam (Town of Mount Holly water supply intake)
2Category:
ACS:
Parameter Of Interest:
Collection Year:
303(d) yr:
i
EC
PCB Fish Tissue Advisory (Advisory, FC, NC)
2012
2014
11-135a Crowders Creek 1.9 FW Miles C
From source to SR 1118
ICategory:
ACS:
Parameter Of Interest:
Collection Year:
303(d) yr:
i
EC
Benthos Fair (Nar, AL, FW)
2002
1998
i
EC
Fish Community Poor (Nar, AL, FW)
2004
1998
11-135f Crowders Creek 1.4 FW Miles C
From State Route 321 to State Route 2424
IRCategory:
ACS:
Parameter Of Interest:
Collection Year:
303(d) yr:
5
EC
Benthos Fair (Nar, AL, FW)
1989
2000
11-135c Crowders Creek 3.3 FW Miles C
From State Route 1122 to State Route 1131
IRCategory:
ACS:
Parameter Of Interest:
Collection Year:
303(d) yr:
5
EC
Fish Community Poor (Nar, AL, FW)
2004
1998
11-135e Crowders Creek 1.5 FW Miles C
From State Route 1108 To NC 321
IRCategory:
ACS:
Parameter Of Interest:
Collection Year:
303(d) yr:
5
EC
Benthos Fair (Nar, AL, FW)
1989
2000
2014 NC 303(d) List -Category 5 Final December 19, 2014 Page 22 of 149

FACT SHEET FOR EXPEDITED PERMIT RENEWALS
This form must be completed by Permit Writers for all expedited permits which do not require
full Fact Sheets. Expedited permits are generally simple 100% domestics (e.g., schools, mobile
home parks, etc) that can be administratively renewed with minor changes, but can include
facilities with more complex issues (Special Conditions, 303(d) listed water, toxicity testing,
instream monitoring, compliance concerns).
Basic Information for Expedited Permit Renewals
Permit Writer/Date
Charles H. Weaver 6/2/2015
Permit Number
NC0077763
Facility Name
Belmont WTP
Basin Name/Sub-basin number
03-08-34
Receiving Stream
Catawba River
Stream Classification in Permit
WS-1V & B CA
Does permit need Daily Max NH3 limits?
N / A
Does permit need TRC limits/lan e?
No — already resent
Does permit have toxicity testing?
Yes
Does permit have Special Conditions?
No
Does permit have instleanl monitoring?
No
Is the stream impaired (on 303(d) list)?
For whatparameter?
Yes. Stream segment has fish tissue advisory
for PCBs.
Any obvious compliance concerns?
No. Facility has not discharged since 2012.
Permittee is maintaining permit as a backup
measure; backwash currently discharged to
Belmont WWTP collections stem..
Any permit modifications since lastpermit?
None.
New expiration date
7/31/2020
Comments on Draft Permit
➢ Added regulatory citations
➢ Added eDMR requirements
➢ Added parameter codes to effluent
age
Most Commonly Used Expedited Language:
• 303(d) langaaee for Draft/Final Cover Letters: "Please note that the receiving stream
is listed as an impaired waterbody on the North Carolina 303(d) Impaired Waters List.
Addressing impaired waters is a high priority with the Division, and instream data will
continue to be evaluated. If there is noncompliance with permitted effluent limits and
stream impairment can be attributed to your facility, then mitigative measures may be
required".
TRC language for Compliance Level for Cover Letters/Effluent Sheet Footnote:
"The facility shall report all effluent TRC values reported by a NC certified laboratory
including field certified. However, effluent values < 50 µg/L will be treated as zero for
compliance purposes."
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4 PAY Pue<<c%
m
C.ARa�
January 20, 2015
NCDENR
Division of Water Resources
NPDES Unit
1617 Mail Service Center
Raleigh. NC 27699-1617
Citv of Belmont Public Works
Utilities- Water Treatment Plant
205 North Tenth Street ' PO Box 431 - Belmont, NC 28012
r'vw�r_<-iivo'hci-no
Telephone [phone] ' Fax [phone]
RECEIVEDlDENR1DWR
RE: Renewal of NPDES Permit# N00077763 .JAN 2 6 2015
Water Quality
Permitting Sectior
NPDES Unit:
This letter is to inform you of the City of Belmont's desire to renew NPDES Permit NC0077763.
As of June 13, 2012, the City of Belmont has changed the status of NC0077763 to inactive
status. The City would like continue to operate the permit in inactive status. We will continue to
send discharge to the waste water plant. Settled sludge continues to be handled under land
application permit WQ0019504.
The application renewal and supporting documents are attached. We understand that we are still
responsible for the annual permit fee.
Please do not hesitate to contact us if you have any questions or concerns.
Sincerely.
Barry Webb
City Manager. Permittee
Cc: Chuck Flowers. Utility Director
Joe Roy, ORC Belmont Water Plant

Belmont Water Plant Flow Through Schematic
Filters
I Chlorine I
3.0 MGD I1.9 MGD
Chemical Injection Point
Catawba River
0.075 MGD
Raw Water Pump House
Floccuation Basins
Sedimentation Basins To Waste Water Plant
Filters Clarifier
Clearwells
Finished Water Pump House
Flow from Filter Back Wash or Basin Cleanout
Clarifier
Sludge Pumped Out and Land Applied
Decant from Clarifier
'Flow Rates are typical for when process is in
operation, but may vary according to demand.
Aluminum
Chlorine
Caustic
4.9
To Land Application Site
Used when Permit
NC0077763 Is active
5.2 MGD
�a_IYa\k�
'ry CPP�
City of Belmont Water Plant (2015)
KMnO,
4.9 MGD

o PUBLIC
-1 Utilmes- Water Treatment Plant
Solids Handling Plan for the City of Belmont WTP
The wastewater from the Belmont WTP is allowed to settle in the clarifier for a minimum of two hours.
A valve is opened after proper settling time to allow the supernatant to be discharged. Settled sludge is
pumped out as needed (usually once a year). Sludge is land applied via permit WQ0019504.
The solids are settled out in the Sludge Thickener. All operators have access to the City of Belmont
Water Treatment Plant Operation & Maintenance Manual, which provides an explanation of the Sludge
Thickener and its operation in section 4.2. The description is attached to this plan as well.

CITY OF BELMONT WATER TREATMENT PLANT
CHAPTER 4 - WASTE HANDLING FACILITIES
4.2 SLUDGE THICKENER
4.2.1 Objectives and Desion Basis
The objectives of the Sludge Thickener are to collect the sludge ;lows from the Sedimentation
Basins. to separate the solids and ws;;er, and to ccncentrate the sclids for pumping to the
Centrifuge t7uildinu. Or
•r: L... ,:�..:.5 for c��'.� --
Typically, sludge thickeners will concentrate the influent solids by two to seven times. For
example, an influent solids concentration of four percent could be thickened to a concentration
between about 8 percent and 28 percenT. Solids and water separate by gravity and the solids are
allowed to accumulate in the sludge thickener. Once the thickener is full, the solids can be
pumped out to be land applied, or pumped to the Centrifuge.
4.2.2 Equipment Description
A. SLUDGE THICKENER
Construction:
��ncrete
Diameter: -
61 feet
Depth (maximum):
16 feet
Capacity:
349:400 gaidons
Surface Area:
2,920 ftz
Slud a Scraper
Manufacturer: Envirex
Type: H-60LT
Collector speed: 6.13 feettminute
Motor for Reducer
Motor Manufacturer:
Baldor
Model:
IM-3546T-5
Horsepower:
1.5
Minutes per revolution:
31.25
Speed:
1730 rpm
Voltage:
208
Amperage:
5.6
1. Eguipment Characteristics
The Sludge Thickener is located east of, the CiearAells next to the Centrifuge Building. The
thickener is used to collect sludge flcws from the Sattling Basins and drain water from the
City of Belmont 4.2

City of Belmont Public Works
U6lmes- Water Treatmeu Plant.
205 North Tenth Street ' Po Box 431 - Belmont. NC 2807 2
runr.rtvOEy_elmocz o_-
'I tieohone 704-823-2625 ' Fzx 70-82-5-4208
June 13, 2012
Mr. Robert Sledge, Environmental Specialist
Division of Water Quality
1617 Mail Service Center.
Raleigh, NC 27699-1617
RE: Change of NPDES Permit# NC0077763 to inactive states
Dear Mr. Sledge:
This letter is to inform you of the City- of Belmont's desire to c ar._e NPDES PeIFITMI \C00; 7763
to an inactive status as of July t , 2012. We would like to divert Me waste water from _he Wate-
Treatment Plant to the Belmont Waste Water Plant for treaanent.
The Water Plant's waste water can be diverted by installing 2 plugs in the lines feeding our
thickener. The waste water then rlows through the collection system to the Bel_rnont �L rite at
Plant. Alternatively, waste water can be pumped from the thickener directly into the collection
system if needed. Pilot tests have shown no negative impacts on the Belmont Waste Water
Plant's process or effluent.
We understand that we are still responsible for the annual pe^Tit fee.
Sincerely,
Barry ebb
City Manager, Permittee
Cc: Wes Bell, Environmental Specialist, Mooresviiie Reglonal on -Ice
Chuck Flowers, Utility Director
Sandra Craft, ORC Belmont Waste Water Plan-,
Joe Roy, ORC Belmont Water Plant