NC0081671_Renewal Application_20160321

City of Greensboro
k_ .4 North Carolina
Addendum
Sludge Management Plan
The City of Greensboro's Lake Townsend Water Treatment Plan is a conventional surface water
treatment facility permitted to treat (filter) 30 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 21 MGD.
All filter backwash and sedimentation wastewater from the facility flows to a settling lagoon on
the plant site. Filter backwash flow is intermittent based on plant treatment rate and raw water
quality conditions. Sedimentation wastewater flow is relatively constant with automated
equipment removing dilute sludge (approximately 1% solids)to maintain full sedimentation
basin volume.
As wastewater flows through the settling lagoon,solids removed during the treatment process
(consisting of primarily of Ferric Sulfate precipitate and the captured turbidity causing materials
from the untreated raw water) settle to the bottom of the lagoon leaving a clear supernatant
which meets the NPDFS permit requirements.
Sludge solids generated from the treatment process average approximately 1,100 dry tons per
year. At 12 to 15 month intervals, the city contracts with a private sludge management firm,
currently Tervita Corporation, to dredge and dewater the solids from the lagoon. The most
recent cleaning began in August 2015 and was completed in October 2015.
P.O. Box 3136 • Greensboro.NC 27102-3136 • www.greensboro-nc.gov • (336)373-CITY(2489) • TTY#333-6930

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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 NC0081671
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 Lake Townsend Water Treatment Plant
Mailing Address PO Box 3136
City Greensboro
State /-"Zip Code North Carolina, 27402-3136
Telephone Number [phone] RECEIVEDINCDE( JDVVR
Fax Number [phone] MAR 21 2016
e-mail Address Barry.parson «,greensboro-nc.gov Water Quality
Permitting Section
2. Location of facility producing discharge:
Check here if same as above 0
Street Address or State Road 6268 Bryan Park Road
City Browns Summit
State / Zip Code North Carolina 27214-9755
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 0 Private 0 Public Ej
Page 1 of 3 Version 5/2012

r City of Greensboro 004
. North Carolina
February 15, 2016
Ms. Wren Thedford
NC DEQ/DWR/NPDES Unit
1617 Mail Service Center
Raleigh,NC 27699-1617
Dear Mrs. Sprinkle:
This letter is to request renewal and consideration for coverage under NCG590000 general
permit. We have reviewed conditions set forth in the NCG90000 general permit and would like
to be considered for coverage. We understand that we arc required to comply with whole
effluent toxicity annual testing with a"pass"limitation.
Please find enclosed a completed permit renewal package for the City of Greensboro's Lake
Townsend Water Treatment Plant—NPDES permit, NO. NC0081671. 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].
Since!,iy,
Steven II. Drew
Director of Water Resources
cc: COGWR File
Enclosures
0 P.0. Box 3136 • Greensboro, NC 27402-3136 • www.greensboro-nc.gov • (336)373-CITY(2489) • TTY#333-6930

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 0 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:
✓ New applicants are highly encouraged to contact a permit coordinator with the
NCDENR Customer Service Center.
Was the Customer Service Center contacted? 0 Yes ❑ No
Y Analyses of source water collected
- Engineering Alternative Analysis
i 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 rew Water Resources Director
Printed n of Pe► .n �;,ni g Title
- n - iy,
4.
,kk___/
Signature Applicant 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 3of3
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)
El 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 Townsend)
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
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 flowrate 30 MGD
Backwash or reject flow 772,600 MGD
12. Name of receiving stream(s) (Provide a map showing the exact location of each outfall, including
latitude and longitude):
Reedy Fork Creek Outfall is at N 36 degrees 11.430', W 079 degrees 43.855'
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

PAT MCCRORY
't a i;ori-rnur
DONALD R. VAN DER VAART
S. JAY ZIMMERMAN
Water Resources
ENVIRONMENTAL QUALITY
March 22, 2016
Steven D. Drew
City of Greensboro
PO Box 3136
Greensboro,NC 27402-3136
Subject: Acknowledgement of Permit Renewal
Application No.NC008.1671
Lake Townsend WTP
Guilford County
Dear Permittee:
The Water Quality Permitting Section has received your permit renewal application on March 22,
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 Tom
Belnick at 919-807-6390 or [e-mail].
Sincerely,
W recti Tke Voro(/
Wren Thedford
Wastewater Branch
cc: Central Files
NPDES
Winston-Salem Regional Office
State of North Carolina I Environmental Quality I Water Resources
1617 Mail Service Center Raleigh,North Carolina 27699-1617
919-807-6300