NC0087866_Renewal (Application)_20160331

PIEDMONT TRIAD REGIONAL WATER AUTHORITY
March 30, 2016
Via Hand Delivery
Mr. Wren Thedford i�ECEIVtDiNCIDEDONR
NC DENR/DWR/NPDES Unit MAR 3 I L_"i16
1617 Mail Service Center
Raleigh, NC 27699-1617 water Qijality
Permitting Section
RE: NPDES Permit Renewal
Permit Number NCO087866
Dear Mr. Thedford:
Enclosed please find a copy of our renewal application for NPDES permit number NC0087866.
The renewal package includes original and 2 copies of the NPDES Permit Application—Short
Form C—WTP and our Sludge Management Plan as well as required exhibits. The only
significant change in the facility since our last renewal is that the water treatment plant capacity
has increased from 12 MGD to 14.7 MGD; while we are not currently operating at this high
output capacity when we are it will most likely result in a higher wastewater discharge flow rate.
The permit application has been drafted to indicate the higher rate for the water treatment plant.
In considering our renewal application we would request that you consider the following specific
concerns:
• Our current NPDES permit includes an effluent limitation for manganese that is
scheduled to become effective in March 2019. It is our understanding that manganese is
no longer an enforced water quality discharge constituent for this level of permit and we
therefore request that the effluent limit and compliance deadline be removed with this
permit renewal.
• On the renewal application we have indicated that the facility does use membrane
filtration technology,however; we believe that the membranes in use at our facility
should be considered under the classification for conventional treatment and that in fact
our facility should be eligible for coverage under the General Permit for Greensand and
Conventional Water Treatment Plants. Our facility use low pressure microfiltration
technology, this process does not produce the high concentration waste stream typically
Mailing Address: P.O. Box 1326•Randleman,NC 27317
Physical Address: 7297 Adams Farm Road•Randleman,NC 27317
Telephone: [phone]-Fax: [phone]

associated with membrane filtration that is a concern in wastewater treatment and
discharge. The process does include a chlorine and pH cleaning of the membranes but
neutralization of the cleaning water is performed prior to discharge to the wastewater
system so there are no adverse cleaning agents as is typically associated with membrane
filtration. These membranes perform the same function as dual media filtration; they just
provide a physical barrier against contamination. We would ask that these facts be
considered in our renewal.
• Our current permit includes chronic toxicity monitoring at the 90% effluent concentration
we believe that the 90% effluent concentration is overly restrictive and that it does not
reflect actual conditions. It is our understanding that the 90% concentration requirement
was implemented solely due to the fact that the discharge is to a reservoir. We believe
that the discharge location, relative size of the reservoir and the required continuous
downstream release from the reservoir should be considered in this evaluation. With
consideration of these factors we believe that evidence would show that substantial
dilution of the wastewater effluent does occur and that a lower effluent concentration for
chronic toxicity sampling is justified.
Thank you in advance for considering these concerns as you review our application. Should you
need any additional information on any items or need to discuss the renewal further please give
me a call.
Sincerely,
Gregory T. Flory, P.E.
Executive Director
enc.: NPDES Permit Application
Sludge Management Plan

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 INCO087866
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 Piedmont Triad Regional Water Authority
Facility Name John F. Kime Water Plant
Mailing Address P.O. Box 1326
City Randleman REGEIVcni� ,BWIR
State / Zip Code North Carolina / 27317
Telephone Number [phone]
Fax Number [phone] Water Quality
Permitting Sectian
e-mail Address gflorv(a ptrwa.org
2. Location of facility producing discharge:
Check here if same as above ❑
Street Address or State Road 7297 Adams Farm Road
City Randleman
State / Zip Code North Carolina / 27317
County Randolph
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 Piedmont Triad Regional Water Authority
Mailing Address P.O. Box 1326
City Randleman
State / Zip Code North Carolina / 27317
Telephone Number [phone]
Fax Number [phone]
4. Ownership Status:
Federal ❑ State ❑ Private ❑ Public
Page I of 4 Version 5/2012

NPDES PERMIT APPLICATION - SHORT FORM C - WTP
For discharges associated with water treatment plants
S. 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)
Water Treatment Plant source water is the Randleman Regional Reservoir, raw water is drawn
from the reservoir through a raw water pump station location on the Deep River arm of the
reservoir.
7. Describe the treatment process(es) for the raw water:
Raw water is initially treated with potassium permanganate for the oxidation of iron and
manganese. The water is then sent through the rapid mix process where sodium hypochlorite,
ferric sulfate and an anionic polymer are added before the water is delivered to two upflow
clarification units. Sulfuric acid can also be added at the rapid mix for additional pH
optimization as necessary. Initial flocculation and sedimentation occur in the clarification units
before water is sent through the filtration process. The facility has the capability to filter water
using any or all of three different processes including dual media filtration, micro-membrane
filtration and granular activated carbon filtration. Following the filtration process the water is
sent to clearwells where disinfection with sodium hypochlorite occurs, fluoride and an
orthophosphate are also added at this point. Following disinfection in the clearwells, final pH
adjustment occurs with the addition of lime slurry or sodium hydroxide and the chlorine is
converted to chloramines with the addition of aqueous ammonia for final delivery to the
transmission system.
While we have indicated that the facility uses membrane technology, the membranes in use are
low pressure micro filters and they do not produce the high concentrate discharge streams
associated with high pressure membrane systems such as RO and nanofilters. We believe the
micro filters in use at our facility should fall in the same classification as conventional
treatment.
S. Describe the wastewater and the treatment process(es) for wastewater generated by the
facility:
Wastewater from the facility is generated from four main treatment processes, wasting from
coagulation, backwash and maintenance wash waste from the filtration processes, process
wastewater and solids dewatering. The wastewater treatment process consists of an
equalization lagoon, gravity thickener, decant lagoon, discharge flume with flow measurement
and belt filter press for solids dewatering. As necessary pH adjustment can be performed prior
to water entering the decant lagoon, dechlorination can also be performed as necessary at the
discharge flume.
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:
Page 2 of 4 Version 5/2012

NPDES PERMIT APPLICATION - SHORT FORM C - WTP
For discharges associated with water treatment plants
11. Plant design potable flowrate 14.7 MGD
Backwash or reject flow 1.75 MGD
12. Name of receiving stream(s) (Provide a map showing the exact location of each outfall, including
latitude and longitude):
Randleman Lake - Deep River Arm of the reservoir- See attached detail map- Exhibit `A'
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 X No
Fluoride Yes X No
Ammonia nitrogen / Chloramines Yes X No
Zinc-orthophosphate or sweetwater CP1236 Yes No
List any other additives below:
Potassium permanganate, poly phosphate blend (AquaPure 3655), sodium hypochlorite,
polymer
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]. -Attached as
Exhibit `B'
Solids Handling Plan-Attached as Exhibit `C'
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
01 Discharges from Ion Exchange and Reverse Osmosis plants shall be evaluated using a
water quality model.
Page 3 of 4 Version 5,2012

NPDES PERMIT APPLICATION - SHORT FORM C - WTP
For discharges associated with water treatment plants
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.
C -fLc rK4 T Rjru D;re-,7to(-
Printed—harhe of Person Signing Title
Signatttfi�of Applicant J bate
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 4 of 4 Version 5/2012

Exhibit `A'

3/30/2016 Randolph County GIS
Piedmont Triad Regional Water
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**'I•Ni, Disclaimer: This map was compiled•jrom recorded deeds,plats,and other public records Map Scale
�+ and data. Users of this data are hereby notified that the aforementioned public information
s 1 inch=667 feet
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sources should be consulted•for verification ofthe information.Randolph County, its agents 3/30/2016
nn and emphrvees make no warranh,as to the accuracy of the information on this map.
http://gis.randolphcountync.gov/randolphjs/ 1/1

Exhibit `B'

Exhibit `C'

Potassium Permanganate Sodium Hypochlorite
Ferric Sulfate Fluoride
pH Adjustment pH Adjustment
Sodium Hypochlorite Polymer Sodium Hypochlorite Corrosion Inhibitor
Raw Water Raw Water Dual Media Microfiltration 2-3 MG
- —� Flash Mix -- - - Clarifier ---- --- - -- --- --- - GAC Filters
Intake 16.35 MGD Pump Station 16.35 MGD 16.35 MGD 16.2 MGD Filtration 15.6 MGD Membranes 14.85 MGD 14.7 MGD Clearwells
14.7 MGD Sodium Hypochlorite
F---— ---— -----
0.15 MGD 0.6 MGD 0.75 MGD 0.15 MGD Ammonia
Sludge Blowdown — _ pH Adjustment
Backwash Finished Pump
Station
10.51 MGD 4.19 MGD
Decant North System South System
---------- --- -- -> Sludge Equalization
Thickener _- -__ _sludge _ Lagoon
Decant
— - - Decant Lagoon
pH Adjustment
Polymer Randleman Lake
1.75 MGD Effluent Outfall 001
Chamber/Meter
Plant water Belt Press
0.1 MG Dechlorination
E Press Decant
- -- Sludge Storage Landfill/Land
Application
Drain
JFK Water Treatment Plant Process Flow Schematic

G'Y►
PIEDMONT TRIAD REGIONAL WATER AUTHORITY
John F Kime Water Treatment Plant
Solids Management Plan
March 2016
Prepared by: Gregory Flory
Y Y�
Signature
Mailing Address: P.O. Box 1326•Randleman,NC 27317
Physical Address: 7297 Adams Farm Road•Randleman, NC 27317
Telephone: [phone]• Fax: [phone]

Process
Solids from the John F Kime Water Treatment Facility are primarily generated
through the coagulation and flocculation process and as a by-product of the
filtration process in the form of backwash water. Solids from the coagulation and
flocculation process are delivered directly to the gravity thickener. Solids from the
filtration process are delivered to the equalization lagoon where they can be
transferred to the gravity thickener either through a single 12-inch floor drain and
pump station or using a mechanical dredge.
The gravity thickener allows solids to slowly thicken over time before removal for
further dewatering by a 2.2 meter Charter tower belt filter press. Overflow from
the thickener can either be directed back to the equalization lagoon where it can
overflow into the decant lagoon or it can be sent directly to the decant lagoon.
Thickened sludge is drawn off the bottom of the thickener through a dual pump lift
station and sent to the belt press where it is treated with polymer and dewatered to
a 20 to 25% sludge cake. Dewatered sludge is stored in a contained concrete
storage area with runoff directed back to the sludge thickener.
Sampling
Process control sampling of the sludge is performed prior to and after dewatering
on the sludge press. Thickened sludge from the gravity thickener is sampled once
per week for solids consistency to ensure appropriate application to the belt press.
Sludge from the belt press is analyzed at least on a twice weekly basis to determine
the percent sludge cake with a goal of obtaining at least a 20% sludge cake. This
analysis is performed in-house by PTRWA personnel.
Annually PTRWA collects a TCLP sample of the sludge for compliance with
landfill disposal requirements. TCLP analysis is performed by a contract
laboratory.
Land application sampling is the responsibility of Synagro Technologies under the
contractual agreement with PTRWA. Synagro collects all samples required for
meeting their land application permit requirements and submits these samples
directly with their annual sampling report of compliance.

Solids Handling
Disposal of dewatered sludge is currently managed through land application under
contract with Synagro Technologies, Inc. Synagro is responsible for handling all
land application permitting, land application sampling and transporting. In the
event of adverse weather conditions restricting land application PTRWA maintains
approval to dispose of dewatered sludge at the Uhwarrie Environmental Landfill in
Mount Gilead, North Carolina. When it is necessary to dispose of sludge in the
landfill PTRWA either contracts hauling with Lemons Backhoe and Loader
Service or handles hauling directly using our own personnel and equipment.

w PAT MCCRORY
DONALD R. VAN DER VAART
" Secretary-
S. JAY ZIMMERMAN
Water Resources
ENVIRONMENTAL QUALITY Director
March 31, 2016
Gregory T.Flory,Executive Director
Piedmont Triad Regional Water Authority
PO Box 1326
Randleman,NC 27317
Subject: Acknowledgement of Permit Renewal
Application No.NCO087866
John F.Kime WTP
Randolph County
Dear Permittee:
The Water Quality Permitting Section has received your permit renewal application on March 30,
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(re,vv TkZot f o rad
Wren Thedford
Wastewater Branch
cc: Central Files
NPD1S
Winston-Salem Regional Office
State of North Carolina I Environmental Quality I Water Resources
1617 Mail Service Center I Raleigh,North Carolina 27699-1617
919-807-6300