NC0081426_Renewal Application_20160225

• City of Greensboro
1 J North Carolina
RECEIVED/NCDEQ DWR
February 15, 2016
FEB 2 5 20#6
Ms. Wren Thedford Water Quality
NC DEQ/DWR/NPDES Unit Permitting Section
1617 Mail Service Center
Raleigh, NC 27699-1617
Dear Mrs. Sprinkle:
This letter is to request renewal of an existing NPDES permit. Please find enclosed a completed
permit renewal package for the City of Greensboro's N.L. Mitchell Water Treatment Plant—
NPDES permit, NO. NC0081426. Limitations in sludge handling has been identified and added
to the CIP to mitigate future upgrades improving sanitary and stream discharge.
If you should need any additional information, please contact the Water Supply Manager at
[phone].
Sin ely,
Steven D. Drew
Director of Water Resources
cc: COGWR File
Enclosures
640 P.O. Box 3136 • Greensboro. NC 27402-3136 • www.greenshorn-nc.gov • (336) 373-CITY(2189) • TTY#333-6930

NPDES PERMIT APPLICATION - SHORT FORM C - WTP
For discharges associated with water treatment plants
Mail the complete application to:
N. C. Department of Environment and Natural Resources
Division of Water Quality / NPDES Unit
1617 Mail Service Center, Raleigh, NC 27699-1617
NPDES Permit Number NC0081426
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 Greensboro
Facility Name N.L. Mitchell Water Treatment Plant
Mailing Address PO Box 3136 RECEIVED/NCDEQ/DVVR
City Greensboro FEB 2 5 2016
State / Zip Code North Carolina, 27402-3136
Vtinter 4oslity
Telephone Number [phone]Permitting Section
Fax Number [phone]
e-mail Address Barry.parsons(u;green sboro-nc.gov
2. Location of facility producing discharge:
Check here if same as above ❑
Street Address or State Road 1041 Battleground Avenue
City Greensboro
State / Zip Code North Carolina, 27408
County Guilford
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 Barry Parsons
Mailing Address 1041 Battleground Avenue
City Greensboro
State / Zip Code North Carolina, 27408
Telephone Number [phone]
Fax Number [phone]
4. Ownership Status:
Federal ❑ State ❑ Private ❑ Public
Page 1 of 3 Version 5/2012

NPDES PERMIT APPLICATION - SHORT FORM C - WTP
For discharges associated with water treatment plants
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 (Lake Brandt)
7. Describe the treatment process(es) for the raw water:
The treatment process is coagulation flocculation using ferric sulfate as the primary
coagulant entering sedimentation basins, followed by filters and then disinfected with
sodium hypochlorite. The primary disinfectant is Chlorine and secondary disinfectant is
Chloramines.
8. Describe the wastewater and the treatment process(es) for wastewater generated by the
facility:
Settling and Decanting
9. Number of separate discharge points: 1
Outfall Identification number(s) 001
10. Frequency of discharge: Continuous ® Intermittent ❑
If intermittent:
Days per week discharge occurs: Duration:
11. Plant design potable flow rate 24 MGD
Backwash or reject flow 180,567 MGD
12. Name of receiving stream(s) (Provide a map showing the exact location of each outfall, including
latitude and longitude):
North Buffalo Creek Outfall is at N 36 degrees 04.876', W 079 degrees 48.216'
13. Please list all water treatment additives, including cleaning chemicals or disinfection
treatments, that have the potential to be discharged.
Alum / aluminum sulfate Yes No
Page 2 of 3 Version 5/2012

NPDES PERMIT APPLICATION - SHORT FORM C - WTP
For discharges associated with water treatment plants
Iron sulfate / ferrous sulfate Yes No
Fluoride Yes No
Ammonia nitrogen / Chloramines Yes No
Zinc-orthophosphate or sweetwater CP1236 Yes No
List any other additives below:
Ferric Sulfate, Sodium Hypochlorite, Sodium Hydroxide
Hydrofluoric Acid, Calcium Hydroxide Calcium Thiosulfate - d-chlorination
14. Is this facility located on Indian country? (check one)
Yes El 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. NEW Applicants
Information needed in addition to items 1-15:
y New applicants are highly encouraged 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.
Steven )1. Drew Water Resources Director
Printed .tete of Pe, s Title
—
Sign. .r; of Applic. Date
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 5/2012

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City of Greensboro
North Carolina
Addendum
Sludge Management Plan
The City of Greensboro's Mitchell Water Treatment Plan is a conventional surface water
treatment facility permitted to treat(filter) 24 million gallons of water per day (MGD). The
water produced by the facility meets all applicable State and Federal standards. The current
average daily production at the facility is 14 MGD.
All filter backwash wastewater from the facility flows to a settling basin on the plant site. Filter
backwash flow is intermittent based on plant treatment rate and raw water quality conditions.
The wasterwater-settling basin allows for gravity settling of captured solids and is equipped with
four floating decanters, which removes fine solids prior to discharge. As filter backwash flows
through the settling basin, solids removed during the treatment process (consisting primarily of
Ferric Sulfate precipitate and the captured turbidity causing materials from the untreated raw
water) settle to the bottom of the basin leaving a clear supernatant which meets the NPDES
permit requirements.
Sludge solids generated from the treatment process are drawn off the settling basin bottom on a
daily basis and discharged directly to the City's North Buffalo/Metro system of wastewater
reclamation plants via sanitary sewer. At the wastewater reclamation plant, sludge solids from
the water plant are blended with other wastewater solids and then thickened, dewatered, and
incinerated.
640 P.O. Box 3136 • Greensboro. NC 27.102-3136 • www. ;reensboro-ncgm • (336) 373-CITY(2.189) • TTY#333-6930

City of Greensboro
North Carolina Office of the City Manager
March 6, 2015 Certified Mail 7003 1680 0001 0765 9814
Return Receipt Requested
•
Mr. Jeff Poupart
North Carolina Department of Environment and Natural Resources
Division of Water Resources (DWR) RECEIVED/NGDE(�DWR
5
1617 Mail Service Center
Raleigh, NC 27699-1617 FEB 201
Subject: Delegation of Signatory Authority Water •
Quality
NPDES Program Signatory Authority Permitting Section
Pretreatment Program Signatory Authority
City of Greensboro,North Carolina
Guilford County
Dear Mr. Poupart,
In response to the State of North Carolina (and Environmental Protection Agency)requirements
to submit Delegation of Signatory Authority for the National Pollutant Discharge Elimination
System (NPDES) Program and Pretreatment Program, the City of Greensboro hereby submits the
following Delegation of Signatory Authority. The signatory delegations listed herein will be
effective immediately and will remain in effect until further notice. The Previous City of
Greensboro Signatory Delegation document►ras submitted in February 2007.
NPDES Signatory Authority
Water Reclamation Facilities
Signatory Authority for all NPDES Program documents for NPDES Permit NC0024325 (North
Buffalo POTW) and NPDES Permit NC0047384(T. Z. Osborne POTW) including but not
limited to: NPDES Permit Applications, Discharge Monitoring Reports,Annual POTW Reports,
and Annual Sludge Reports, is hereby delegated to the Water Resources Director, and if
necessary, further delegated to the Water Resources Deputy Director and the Water Reclamation
Manager. In addition, Signatory Authority for the Annual Sludge Report is further delegated to
the Operator In Responsible Charge (ORC)of the T. Z. Osborne Publicly Owned Treatment
Works(POTW).
PO Box 3136 Greensboro, NC 27402-3136 www.greensboro-nc.rov 336.373-CITY(2489) TTY#333.6930
G40
•

•
•
Page 2-Signatory Authority Delegation Letter from Jim Westmoreland to NC-DWR
March 6, 2015
Drinking Water Facilities
Signatory Authority for all NPDES Program documents for NPDES Permit NC0081426
(Mitchell Water Plant)and NPDES Permit NC0081671 (Lake Townsend Water Plant)including
but not limited to:NPDES Permit Applications and Discharge Monitoring Reports, is hereby
delegated to the Water Resources Director, and if necessary, further delegated to the Deputy
Water Resources Director and Water Supply Manager.
Pretreatment Program Signatory Authority
Article I, Section 2 of the City of Greensboro Sewer Use and Pretreatment Ordinance states:
"Except as otherwise provided herein, the Director and the Industrial Waste Section of the
Water Resources Department shall administer, implement and enforce the provisions of this
ordinance. Any powers granted to or duties imposed upon the City Manager, Water Resources
Director, Water Reclamation Manager, or Laboratory/Industrial Waste Section Supervisor may
be delegated to other City personnel. "
Signatory Authority for all Pretreatment Program documents for NPDES Permit NC0024325
(North Buffalo POTW) and NPDES Permit NC0047384(T. Z. Osborne POTW)including but
not limited to: Pretreatment Annual Report, Headworks Analysis Submittal, Industrial Waste
Survey Submittal, Long Term Monitoring Plan Submittal, Significant Industrial User Permits,
Enforcement Response Plan Submittal,Notices of Violation/Other Enforcement Actions, is
hereby delegated to the Water Resources Director and further delegated to the Deputy Water
Resources Director, Water Reclamation Manager, Laboratory/Industrial Waste Section
Supervisor and Pretreatment Coordinator. Specific Enforcement Action signatory delegation
will be in accordance with the most current DWR approved Enforcement Response Plan on file.
Wastewater Laboratory Certification Signatory Authority
Signatory Authority for all Laboratory Certification documents for the T. Z. Osborne Wastewater
Laboratory (EPA Lab Ill #01090, NC WW Lab Certificate#65)is hereby delegated to the Water
Resources Director and further delegated to the Deputy Water Resources Director, Water
Reclamation Manager, Laboratory/Industrial Waste Section Supervisor,and Laboratory
Coordinator.
If you have any questions, please contact Steve Drew at 336-373-7893.
Sincerely,
kJim estmoreland, P. E.
City Manager !'
PO Box 3136 Greensboro,NC 27402-3136 www.greensboro-nc.gov =336-373-CITY(2489) TTY#333-6930

Page 3-Signatory Authority Delegation Letter from Jim Westmoreland to NC-DWR
March 6, 2015
cc: Steve Drew,Water Resources Director
Michael Borchers, Water Resources Deputy Director •
Elijah Williams, Water Reclamation Manager
Barry Parsons, Water Supply Manager
Martie Groome, Laboratory and Industrial Waste Section Supervisor
Frank Skee, Pretreatment Coordinator
Alicia Goots, Laboratory Coordinator
Lori W. Cooper, T. Z. Osborne ORC
Deborah Gore, DWR Pretreatment, Emergency Response and Collection System Unit
Corey Basinger, DWR Winston-Salem Regional Office Supervisor
••
•
•
•
j'.
is
PO Box 3136• Greensboro, NC 27402-3136 www.greensboro-nc.gov 336-373-CITY(2489) TTY#333-6930
fI
1

4y-4 PAT MCCRORY
F, r;urr,ru»
DONALD R. VAN DER VAART
S. JAY ZIMMERMAN
Water Resources /,,
ivc for
ENVIRONMENTAL QUALITY
February 26, 2016
Mr. Steven D. Drew
City of Greensboro
PO Box 3136
Greensboro,NC 27402-3136
Subject: Acknowledgement of Permit Renewal
Application No. NC0081426
N.L. Mitchell WTP
Guilford County
Dear Permittee:
The Water Quality Permitting Section has received your permit renewal application on February 25,
2016. A member of the NPDES Unit will review your application. They will contact you if additional
information is required to complete your permit renewal. Per G.S. 150B-3 your current permit does not
expire until permit decision on the application is made. Continuation of the current permit is contingent on
timely and sufficient application for renewal of the current permit. Please respond in a timely manner to
requests for additional information necessary to complete the permit application.
If you have any additional questions concerning renewal of the subject permit, please contact Torn
Belnick at 919-807-6390 or [e-mail].
Sincerely,
W rem Th-e o( -CrirO'
Wren Thedford
Wastewater Branch
cc: Central Files
NPDES
Winston-Salem Regional Office
State of North Carolina Environmental Quality(Water Resources
1617 Mail Service Center Raleigh,North Carolina 27699-1617
919-807-6300