NC0082139_Renewal Application_20190221

STI1ROY COOPER (retT,‘„,,,,„...
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Governorsv, .
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MICHAEL S.REGAN .;� , .4
Serrcrory �cR'
LINDA CULPEPPER NORTH CAROLINA
Din far Environmental Quality
February 21, 2019
Randall Emory, PE
Greenville Utilities Commission
PO Box 1847 I
Greenville, NC 27835-1847
Subject: Permit Renewal
Application No. NC0082139
Greenville WTP
Pitt County
Dear Applicant:
The Water Quality Permitting Section acknowledges the February 19, 2019 receipt of your permit renewal application and
supporting documentation. Your application will be assigned to a permit writer within the Section's NPDES WW permitting
branch. 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. The
permit writer will contact you if additional information is required to complete your permit renewal. Please respond in a
timely manner to requests for additional information necessary to allow a complete review of the application and renewal
of the permit.
Information regarding the status of your renewal application can be found online using the Department of Environmental
Quality's Environmental Application Tracker at:
hops://deq.nc.gov/permits-regulations/permit-guidance/environmental-application-tracker
If you have any additional questions about the permit, please contact the primary reviewer of the application using the
links available within the Application Tracker.
Sincerely,
..,1R.44-°(?A.CAti A
Wren Thedford
Administrative Assistant
Water Quality Permitting Section
ec: WQPS Laserfiche File w/application
DE a�A North Caroi na Department of Environments!Quality I Dn s,on of Water Resources
Washir�ton Regional Dffbe 1948 Wash ngton Square Ma 1 I Washington, North Carolina 27889
„� � 252-948-6481

Greenville
Utilities
RECEIvFD/Q
February 13, 2019 NR/DW
FED r 9 2019 R
Water 1-ortnittm- ources
NC DENR, Division of Water Qualityg section
Point Source Branch
1617 Mail Service Center
Raleigh,NC 27699-1617
RE: Renewal Application of NPDES Permit NC0082139
Greenville Utilities Commission, Pitt County
By way of this submittal the Greenville Utilities Commission is requesting renewal of the
subject permit.
Enclosed please find an original and (2) copies of the NPDES permit application
(short form C-WTP), a schematic of flow through the facility and the sludge management
plan for this facility.
If you have any questions or need additional information,please contact Julius Patrick at
[phone].
Sincerely,
- Zrit"
Randall D. Emory, P.E.
Director of Water Resources
RDE/le
Enclosures
cc: Mr. Anthony C. Cannon, General Manager/CEO
Mr. David W. Springer, P.E.,Assistant Director of Water Resources
Mr. D. Anthony Whitehead, Water Quality Manager
Mr. Julius E. Patrick, Superintendent, Water Treatment Plant
PO Box 1847
Greenville,NC 27835
www.guc.com
Your Local
Advantage

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 NC0082139
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 Greenville Utilities Commission
Facility Name Greenville Water Treatment Plant
Mailing Address 801 Mumford Road
City Greenville
State / Zip Code NC/27835
Telephone Number [phone]
Fax Number [phone]
e-mail Address [e-mail]
2. Location of facility producing discharge:
Check here if same as above ❑
Street Address or State Road 1721 Waterway Road
City Greenville
State / Zip Code NC/27834
County Pitt
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 Greenville Utilities Commission
Mailing Address PO Box 1847
City Greenville
State / Zip Code NC/27835-1847
Telephone Number [phone]
Fax Number [phone]
4. Ownership Status:
Federal El State ❑ Private El Public El
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
7. Describe the treatment process(es) for the raw water:
Coagulation, Flocculation, Sedimentation, Ozonation, Filtration
8. Describe the wastewater and the treatment process(es) for wastewater generated by the
facility:
The waste water consists of sedimentation basin residuals/alum sludge, filter backwash,
continuous analyzer discharge, continuous sample tap discharge and storm water. Treatment
consists of settling from the inlet to the discharge which is a distance of about 2500 ft. over a
surface area of 23 acres.
9. Number of separate discharge points: 001
Outfall Identification number(s)
10. Frequency of discharge: Continuous ® Intermittent ❑
If intermittent:
Days per week discharge occurs: Duration:
11. Plant design potable flowrate 22.5 MGD
Backwash or reject flow .673 MGD
12. Name of receiving stream(s) (Provide a map showing the exact location of each outfall, including
latitude and longitude):
Tar 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 El No
Iron sulfate / ferrous sulfate Yes No ❑x
Page 2 of 3 Version 5/2012

NPDES PERMIT APPLICATION - SHORT FORM C - WTP
For discharges associated with water treatment plants
Fluoride Yes ❑x No
Ammonia nitrogen / Chloramines Yes 0 No
Zinc-orthophosphate or sweetwater CP1236 Yes No Di
List any other additives below:
Sodium Permanganate, Powered Activated Carbon, Copper Sulfate, Sodium Hydroxide, Chlorine
DPD Reagents: (Acidic Salts, Ozone Reagents: (Malonic Acid), Potassium Acid Malonate, Ortho Phosphate,
Polyacrylamide, Sodium Hypochlorite, Ammonium Hydroxide, Calcium Thiosulfate
14. Is this facility located on Indian country? (check one)
Yes ❑ 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 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.
Randall D. Emory, P.E. Director of Water Resources
Printed name of Pe son Signing Title
..-X,....-y-z X_z....---ee 0 Z Z_7/j/i
Signature of Applicant Date
North Carolina General Statute 143-215.6(b)(2) provi hat: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

Greenville
Utilities Greenville Utilities Commission WTP Residuals Handling Plan
Greenville Utilities Commission (GUC) existing residuals comprise of sedimentation
basin blowdown, filter backwash, and filter to waste. The residuals waste streams are all
directed to a manhole. Stormwater is also conveyed to this manhole. A 30-inch manhole
with reinforced concrete pipe runs west from the manhole into another manhole where
additional stormwater is tied in. A 36-inch reinforced concrete pipe runs west from this
manhole into an outfall at the residual lagoon. During a 10-year storm an estimated
7,400 gpm of stormwater is diverted to this pipeline, which is approximately half the
flowrate of the maximum instantaneous residual stream. The residuals lagoon is
approximately 23 acres with a depth of 14 feet from the lagoon invert to grade. With an
operating depth of 11 ft., the lagoon has a corresponding volume capacity of
approximately 350,000 cubic yards at 2.25:1 slope
GUC contracted with Hazen to conduct Preliminary Engineering Report (PER) in 2017.
The final report was produced in May 2018. The PER estimates that the lagoon has
210,000 cubic yards of solids or 60 percent full. Existing residuals management
practices, solid production estimates and evaluation of future residual management
alternatives were also included in the PER. The four residual management alternatives
were:
1. Alternative 1-Use existing lagoon-continue to direct all residuals streams to the
existing lagoon.
2. Alternative 2- Construct a new lagoon-direct all residuals streams to a new
lagoon.
3. Alternative 3- Solids Thickening and Dewatering- Direct sedimentation and future
blowdown to thickening and dewatering and continue to direct filter backwash
and filter to waste to the existing lagoon.
4. Alternative 4-Solids Thickening and Dewatering and Backwash Clarification- -
ro Box 1'47 Direct sedimentation and future blowdown to thickening and dewatering and
(;reern tile,NC 27835clarification for filter backwash and filter to waste.
WW\'.f;lll., Ill
Your Local
Advantage

The PER recommended that GUC select Alternate 1-continue to send all residuals
stream to existing lagoon. Also, a recommendation that GUC staff annually dredge new
solids that are collected to maintain the current lagoon functionality and capacity. GUC
had previously established a residual lagoon improvement capital project prior to the
PER. In December 2018, GUC proceeded with a request for bids for sludge removal
from the residual lagoon. A contract was awarded January 31, 2019 for removal of
approximately two times the annual average sludge production. GUC long term plan is
to remove twice the annual average solid production annually to restore additional
capacity in the current lagoon and future WTP expansion.

GREENVILLE UTILITIES WATER TREATMENT PLANT PROCESS DIAGRAM .
RAW WATER •
RAW WATER BYPASS
PUMP STATION ♦ *ACTIVATED
CARBON ALUM
T �:
POLYMER �
A '
CAUSTIC
R 63 MG RAW WATER i ; � RAPID
R ` ♦ ' IMPOUNDMENT ♦ MIXER
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V OZONE
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STORAGE STORAGE B T
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*CHEMICALS ARE FED ONLY AS NEEDED **FED ONLY DURING FILTER BACKWASH FINISHED WATER PUMP STATION

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Greenville Utilities Commission Facility
Greenville Water Treatment Plant Location ^,r-11L,rv`,� �S IJ�avt
1721 Waterway Road,Greenville NC 27835 Scale 1:24,000 °4 "�
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Receiving Stream: Tar River Stream Class: C;NSW
Stream Segment: 28-(94) Sub-Basin: 03-03-05
Drainage Basin: Tar-Pamlico HUC: 03020103 NPDES Permit NC0082139
Latitude: 35°38'04" Longitude: 77°23'55" North
State Grid/USGS Ouad: E29NW/Greenville NW,NC Pitt County
1