NC0077763_Renewal Application_20150126

�.� PUBIj0A. City of Belmont Public Works
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Utilities-Water Treatment Plant
205 North Tenth Street' PO Box 431 * Belmont,NC 28012
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Telephone [phone] " Fax [phone]
January 20. 2015
NCDENR
Division of Water Resources
NPDES Unit
1617 Mail Service Center RECEIVEDIDENRlDWR
Raleigh,NC 27699-1617 JAN 2 6 2015
RE: Renewal of NPDES Permit#NC0077763 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,
(L_- (‘
Barry ebb
City Manager, Permittee
Cc: Chuck Flowers, Utility Director
Joe Roy, ORC Belmont Water Plant

NPDES PERMIT APPLICATION - SHORT FORM C - WTP
For discharges associated with water treatment plants
Mail the complete application to:
N. C. DENR / Division of Water Resources / NPDES Unit
1617 Mail Service Center, Raleigh, NC 27699-1617
NPDES Permit Number NC0077763
If you are completing this form in computer use the TAB key or the up - down arrows to move from one
field to the next. To check the boxes, click your mouse on top of the box. Otherwise,please print or type.
1. Contact Information:
Owner Name City of Belmont
Facility Name Belmont WTP
Mailing Address PO BOX 431
City Belmont RECEIVEDIDENWDWR
State / Zip Code NC
JAN 26 20Irl
Telephone Number [phone]
Fax Number [phone] Water audit_Ctln
Pertnming S
e-mail Address [e-mail]
2. Location of facility producing discharge:
Check here if same as above ❑
Street Address or State Road 205 North 10th St.
City Belmont
State / Zip Code NC
County Gaston
3. Operator Information:
Name of the firm, consultant or other entity that operates the facility. (Note that this is not referring to the
Operator in Responsible Charge or ORC)
Name Belmont WTP
Mailing Address PO BOX 431
City Belmont
State / Zip Code NC
Telephone Number [phone]
Fax Number [phone]
4. Ownership Status:
Federal ❑ State ❑ Private ❑ Public El
5. Type of treatment plant:
Page 1 of 3 Version 3/2014

NPDES PERMIT APPLICATION - SHORT FORM C - WTP
For discharges associated with water treatment plants
® Conventional (Includes coagulation, flocculation, and sedimentation, usually followed by
filtration and disinfection)
❑ Ion Exchange (Sodium Cycle Cationic ion exchange)
❑ Green Sand Filter (No sodium recharge)
❑ Membrane Technology (RO, nanofiltration)
Check here if the treatment process also uses a water softener ❑
6. Description of source water(s) (i.e. groundwater, surface water)
Catawba River
7. Describe the treatment process(es) for the raw water:
Raw water is treated with an initial dose of potassium permanganate. Alum is added. This
water enters the flocculators, and the majority of the dirt falls out in the sedimentation
basins. Water is then chlorinated before it goes through the dual media filters. Fluoride,
caustic, metaphosphate, and chlorine are dosed at the appropriate levels. Water receives
proper contact time in the clearwells before it is sent out to the distribution system.
8. Describe the wastewater and the treatment process(es) for wastewater generated by the
facility:
For active operations: Filter backwash water is allowed to settle in clarifier for a minimum
of two hours. A valve is opened after proper settling time to allow the decant to be
discharged. Settled sludge is pumped out as needed (usually once per year). Sludge is land
applied via permit WQ0019504.
Our NPDES permit is currently inactive. We send filter backwash directly to the Belmont
waste water plant. Basin water/ sludge is sent to clarifier, allowed to settle for two hours,
and the decant is pumped to the Belmont waste water plant. Settled sludge is pumped out
as needed (usually once per year). Sludge is land applied via permit WQ0019504.
9. Number of separate discharge points: one (1) Outfall Identification number(s) 001
10. Frequency of discharge: Continuous ❑ Intermittent
If intermittent:
Days per week discharge occurs: 7 Duration: Twice daily when permit is active
11. Plant design potable flowrate 10 MGD
Backwash or reject flow 0.75 MGD
12. Name of receiving stream(s)(Provide a map showing the exact location of each outfall, including
latitude and longitude):
Catawba River
13. Please list all water treatment additives, including cleaning chemicals or disinfection
treatments, that have the potential to be discharged.
Alum / aluminum sulfate Yes x No
Page 2 of 3 Version 3/2014

NPDES PERMIT APPLICATION - SHORT FORM C - WTP
For discharges associated with water treatment plants
Iron sulfate / ferrous sulfate Yes No x
Fluoride Yes x No
Ammonia nitrogen / Chloramines Yes No x
Zinc-orthophosphate or sweetwater CP1236 Yes x No
List any other additives below:
Chlorine gas
Caustic soda
Potassium permanganate
14. Is this facility located on Indian country? (check one)
Yes 0 No El
15. Additional Information:
• Provide a schematic of flow through the facility, include flow volumes at all points in
the water treatment process. The plan should show the point[s] of addition for
chemicals and all discharges routed to an outfall [including stormwater].
• Solids Handling Plan
16. NEW Applicants
Information needed in addition to items 1-15:
• New applicants are strongly recommended to contact a permit coordinator with the
NCDENR Customer Service Center.
Was the Customer Service Center contacted? ❑ Yes ❑ No
• Analyses of source water collected
• Engineering Alternative Analysis
• Discharges from Ion Exchange and Reverse Osmosis plants shall be evaluated using a
water quality model.
17. Applicant Certification
I certify that I am familiar with the information contained in the application and that to the
best of my knowledge and belief such information is true, complete, and accurate.
Barry Webb City Manager
Printed n. 66 - of Person igning Title ,
/ 240/Sign'''. • Applicant D to
North Carolina General Statute 143-215.6(b)(2)provides that:Any person who knowingly makes any false statement representation,or certification in any application,
record,report,plan,or other document files or required to be maintained under Article 21 or regulations of the Environmental Management Commission implementing that
Article,or who falsifies,tampers with,or knowingly renders inaccurate any recording or monitoring device or method required to be operated or maintained under Article 21
or regulations of the Environmental Management Commission implementing that Article,shall be guilty of a misdemeanor punishable by a fine not to exceed$25,000,or by
imprisonment not to exceed six months,or by both. (18 U.S.C.Section 1001 provides a punishment by a fine of not more than$25,000 or imprisonment not more than 5
years,or both,for a similar offense.)
Page 3 of 3 Version 3/2014

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e:351427" NC0077763
..., , Facility
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Longitude-81'00'59-
Location
Quld# G14.NE (-It- ''.- Iii •I \N.-I-7-)
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: I Stmana°nee.WS-11-.B.C.N.
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Subbasin 30834 .
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SCALE :24000
I 1 7; II
1 1 Receiving Strpant.Catawba River North
_

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its:74
Belmont Water Plant Flow Through Schematic C720,ity of elmontWater Plant(2015)
•
•
V • A
Filters .
A
Caustic
Chlorine Chlorine
Fluoride
Metaphosphate
1.9 MGD
3.0 MGD Aluminum Sulfate
FWP
Chlorine
y Caustic
A
Chemical Injection Point
Catawba River 0.075 MGD 5 2 MGD To Distribution System
Raw Water Pump House
Floccuation Basins
Sedimentation Basins To Waste Water Plant 4.9 MGD
Filters Clarifier
Clearwells
KMnO4
Finished Water Pump House \
Flow from Filter Back Wash or Basin Cleanout To Land Application Site
Clarifier A
Sludge Pumped Out and Land Applied •
Decant from Clarifier RWP
Used when Permit
*Flow Rates are typical for when process is in NC0077763 is active
operation, but may vary according to demand J 4.9 MGD
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205 North Tenth Street' PO Box 431 ' Belmont,NC 28012
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Telephone [phone] ' Fax [phone]
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 Design Basis
The objectives of the Sludge Thickener are to collect the sludge flows from the Sedimentation
Basins. to separate the solids and water, and to concentrate the solids for pumping to the
Centrifuge Building, or pumped.out to trucks for land application.
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 Eauipment Description
•
A. SLUDGE THICKENER
Construction: concrete
Diameter: 61 feet
Depth (maximum): 16 feet
Capacity: 349,400 gallons
Surface Area: 2,920 ft2
Sludge Scraper
Manufacturer: Envirex
Type: H-60LT
Collector speed: 6.13 feet/minute
Motor for Reducer
Motor Manufacturer: Baldor
Model: M3546T-5
Horsepower: 1.5
Minutes per revolution: 31.25
Speed: 1730 rpm
Voltage: 208
Amperage: 5.6
1. gouipment Characteristics
The Sludge Thickener is located east of the Clearwells next to the Centrifuge Building. The
thickener is used to collect sludge flows from the Settling Basins and drain water from the
City of Belmont 1 4.2

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City of Belmont Public Works
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205 North Tenth Street ' PO Box 431 ' Belmont,NC 28012
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=CA Telephone [phone] * Fax [phone]
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 status
Dear Mr. Sledge:
This letter is to inform you of the City of Belmont's desire to change NPDES PermitNC0077763
to an inactive status as of July 1, 2012. We would like to divert the waste water from the Water
Treatment Plant to the Belmont Waste Water Plant for treatment.
The Water Plant's waste water can be diverted by installing 2 plugs in the lines feeding our
thickener. The waste water then flows through the collection system to the Belmont Waste Water
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 permit fee.
Sincerely,
41' ‘L..P....././2
Barry l ebb
City Manager, Permittee
Cc: Wes Bell, Environmental Specialist, Mooresville Regional Office
Chuck Flowers, Utility Director
Sandra Craft, ORC Belmont Waste Water Plant
Joe Roy, ORC Belmont Water Plant

AVA
NCDENR
North Carolina Department of Environment and Natural Resources
Pat McCrory Donald R.van der Vaart
Governor Secretary
January 27,2015
Barry Webb,City Manager
Belmont WTP
PO Box 431
Belmont,NC 28012-0431
Subject: Acknowledgement of Permit Renewal
Permit NC0077763
Gaston County
Dear Mr. Webb:
The NPDES Unit received your permit renewal application on January 26, 2015. A member of the
NPDES Unit will review your application. They will contact you if additional information is required to
complete your permit renewal. You should expect to receive a draft permit approximately 30-45 days
before your existing permit expires.
If you have any additional questions concerning renewal of the subject permit, please contact Charles
Weaver(919) 807-6391.
Sincerely,
•
Wire vv Tl Ldbford
Wren Thedford
Wastewater Branch
cc: Central Files
Mooresville Regional Office
NPDES Unit
1617 Mail Service Center,Raleigh,North Carolina 27699-1617
Location:512 N.Salisbury St Raleigh,North Carolina 27604
Phone:[phone] Fax:[phone]/Customer Service:1-877-623-6748
Internet::www.ncwater.orq
An Equal OpportunityWAtfirrnative Action Employer