NCG590038_Application_20211015

City of Asheville
Water Production
3374 North Fork Left Fork Rd
Black Mountain, NC 28711
Office: 828-669-8569
Fax: [phone]
September 30, 2021
Mr John Hennessy
NC DEQ/ DWR/NPDES
1617 Mail Service Center
Raleigh, NC 27699-1617
Mr Hennessey,
The City of Asheville has reviewed the Division of Water Resources General Permit
NCG590000 for greensand and conventional type water treatment plants and requests that the
discharge from the North Fork WTP be covered under this new general permit. The City
understands that the Division will rescind the individual NPDES permit for the North Fork WTP —
NC0035807 when the Certificate of Coverage for the General Permit NCG590000 is issued to
the City for the WTP.
Sincerely,
Leslie P. Carreiro
Water Production Division Manager
City of Asheville, NC
The City of Asheville is committed to delivering an excellent quality of service to enhance your quality of life.

NPDES PERMIT APPLICATION - SHORT FORM C - WTP
For water treatment plants that desire coverage under General Permit NCG590000
Mail the complete application to:
N. C. Department of Environmental Quality
Division of Water Resources / NPDES program
1617 Mail Service Center, Raleigh, NC 27699-1617
Existing NPDES Permit Number
NC0035807
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
Facility Name
Mailing Address
City
State / Zip Code
Telephone Number
Fax Number
e-mail Address
City of Asheville
North Fork Water Treatment Plant
3374 North Fork Left Fork Road
Black Mountain
NC, 28711
[phone]
(828271-6102)
[e-mail]
2. Location of facility producing discharge:
Check here if same as above El
Street Address or State Road
City
State / Zip Code
County
3374 North Fork Left Fork Road
Black Mountain
NC, 28711
Buncombe
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
Mailing Address
City
State / Zip Code
Telephone Number
Fax Number
4. Ownership Status:
Federal
■
City of Asheville
3374 North Fork Left Fork Road
Black Mountain
NC, 28711
[phone]
[phone]
State ■ Private
■
Public El
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NPDES PERMIT APPLICATION - SHORT FORM C - WTP
For water treatment plants that desire coverage under General Permit NCG590000
5. Type of treatment plant:
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)
Surface Water
7. Describe the treatment process(es) for the raw water:
• Pre -chlorination: Sodium Hypochlorite
• Coagulation/Flocculation: Aluminum Sulfate and flocculation basin.
• Filtration: 6 dual media filters providing filtration and removal of flocc and
sediments.
• Disinfection: Sodium Hypochlorite is added to provide post chlorination residual. CT
is met in the 5 million gallon, baffled clearwell.
• Sodium Bicarbonate, Hydrofluorsilicic Acid, Zinc Orthophosphate and Caustic Soda
are added as water enters the City of Asheville distribution system.
8. Describe the wastewater and the treatment process(es) for wastewater generated by the
facility:
• Wastewater from the North Fork WTP consists of backwash water containing removed
sediments from filtration and the backwash process. This water also contains
residual chlorine and aluminum sulfate from pre -chlorination and
coagulation/flocculation processes. Additional water is added from storm drainage
into lagoon #2.
• Treatment of wastewater is accomplished by tiered wastewater system made up of
three lagoons #1(182,000 gallon capacity), where primary settling occurs. Water
flows from lagoon #1 through an effluent structure to lagoon #2 (978,000 gallon
capacity), where further settling occurs. Water flows from lagoon #2 through an
effluent structure to lagoon #3 (3 million gallon capacity). Influent water flows
through lagoon #3 and is discharged through the effluent structure and then enters
the receiving body of water.
9. Number of separate discharge points: 1
Outfall Identification number(s) 001
10. Frequency of discharge:
Continuous ►l Intermittent
If intermittent:
Days per week discharge occurs: Duration:
11. Plant design potable flowrate 31 MGD
Backwash or reject flow 0.0 - 0.624 MGD
■
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NPDES PERMIT APPLICATION - SHORT FORM C - WTP
For water treatment plants that desire coverage under General Permit NCG590000
12. Name of receiving stream(s) (Provide a map showing the exact location of each outfall, including
latitude and longitude):
North Fork of the Swannanoa 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
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:
Sodium Bicarbonate
Caustic Soda
Sodium Hypochlorite
14. Is this facility located on Indian country? (check one)
Yes ■ No
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. 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.
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of Person Signing Title
Signature of Applicant jefiDate
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.)
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North Fork WTP Sludge Handling Plan for 2021
North Fork Water Treatment Plant
City of Asheville Water Resources Department
NPDES Permit NC0035807
Prepared For: NCDENR/DWQ/NPDES Unit
Prepared BY: Bill Hart, Supervisor, North Fork Water Treatment Plant
Date: September 23, 2021
Currently solids are removed from North Fork WTP lagoons #1 and #2 on an annual basis. The
City of Asheville's Water Resources Department/Water Production Division contracts sludge
removal through a contractor that specializes in removal of solids in a sludge form that are
agitated and pumped into a holding tank to increase solids content. These solids are mixed with
a polymer and processed through a belt filter press to form a dry cake solid that can be
transported to the Buncombe County Sanitary Landfill for disposal.
In 2021, BioNomic Services Inc., removed 67.77 dry tons from lagoons #1 and #2 during a 39
day period.
Signature:
Date:
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