NC0089435_Renewal (Application)_20170201

Water Resources
ENVIRONMENTAL DUALITY
February 02, 2017
Mr. David Boone, Board Chairman
Martin CountyRW&SA
PO Box 668
Williamston, NC 27892
Subject: Permit Renewal
Application No. NC089435
Martin County WTP
Martin County
Dear Mr. Boone:
ROY COOPER
Governor
MICHAEL S. REGAN
Secretary
S. JAY ZIMMERMAN
Director
The Water Quality Permitting Section acknowledges receipt of your permit application and
supporting documentation received on February 1, 2017. The primary reviewer for this renewal a,pplication
is John Hennessy.
The primary reviewer will review your application, and he 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 Mr. Hennessy at 919-807-6377 or [e-mail].
Sincerely,
ZAM 7&## td
Wren Thedford
Wastewater Branch
cc: Central Files
NPDES
Washington 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

MARTIN COUNTY
REGIONAL WATER & SEWER
aul�
Post Office Box 668
Williamston, NC 27892
[phone]
January 27, 2017
Mr. Wren Thedford
NCDENR/DWQ
NPDES Unit
1617 Mail Service Center
Raleigh, NC 27699-1617
RE: MCRWASA WTP Permit Renewal
NPDES Permit #NC0089435
Dear Mr. Thedford,
FEB 01 2017
Water Quality
Permitting Section
Enclosed is the permit renewal application for the Martin County Regional Water and
Sewer Authority (MCRWASA) Water Treatment Facility. The water treatment facility
was commissioned for production on March 7, 2016.
The only change for the permit renewal is the mailing address for MCRWASA.
If you have any questions on this matter, please let me know.
Sincerely,
Martin County Regional Water and Sewer Authority
C )-j'Z: ��
David Bone
Chairman
cc: Ralph Mobley, The Wooten Company
Joe Thaxton, Suez
Chris Myers, T. A. Loving
Cindy Ange, MCRWASA and Martin County

4
NPDES PERMIT APPLICATION - SHORT FORM C - WTP
l For discharges associated with water treatment plants
Mail the complete application to:
N. C. Department of Environment and Natural Resouc����DI�CDEQI®`J�
Division of Water Quality / NPDES Unit SS�c
1617 Mail Service Center, Raleigh, NC 27699-1617 FEB 0 1 2017
NPDES Permit Number NC0089435 WatergiSecti
Permitting Settlors
If you are completing this form in computer use the TAB key or the up - down arrows to moue 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
Martin County Regional Water and Sewer Authority (MCRWASA)
Facility Name
Martin County Water Treatment Plant (WTP)
Mailing Address
PO BOX 668
City
Williamston
State / Zip Code
NC 27892
Telephone Number
[phone]
Fax Number
[phone]
e-mail Address
[e-mail]
1. Location of facility producing discharge:
Check here if same as above ❑
Street Address or State Road 1001 Park Street
City Williamston
State / Zip Code NC /27892
County Martin
2. 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 SUEZ
Mailing Address PO Box 1279
City Clemmons, NC 27012
State / Zip Code NC / 27012
Telephone Number 336-766-0270
Fax Number 336-766-0270
Page 1 of 4 Version 5/2012

NPDES PERMIT APPLICATION - SHORT FORM C - WTP
For discharges associated with water treatment plants
3. Ownership Status:
Federal ❑ State ❑ Private ❑ Public
4. 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 is withdrawn from the Roanoke River a surface water source and transferred to an 11
million gallon basin located at the water treatment facility.
7. Describe the treatment process(es) for the raw water:
The raw water is initially pumped from the Roanoke River and where sodium permanganate (NaMn04) is
added for pre -oxidation to a raw water reservoir for storage. The water is then sent to a low lift pump station
where sodium permanganate (NaMn04) can be added for pre -oxidation again if needed. Afterward, water is
pumped to a chemical feed vault where Powdered Activated Carbon (for TOC removal), caustic (for pH
adjustment), and alum (for coagulation) are added to the water. The water is then sent to a Super Pulsator
Clarifier for clarification where polymer can be added for enhanced clarification. Prior to filtration chlorine
and caustic can also be fed for disinfection and pH/ Alkalinity adjustments, respectively. The water is then
filtered and flows to the chlorine contact tank for disinfection. Afterward, a corrosion inhibitor is added
before the water flows to a 300,000 gallon ground storage tank. The water is then pumped to a 400,000
gallon elevated storage tank from where it enters the distribution system. The waste sludge generated from
the super pulsator clarifiers or overflow is discharge to the sludge storage tank for gravity thickening and
decanting operations. The wastewater generated from filter backwash/filter to waste/sampling operations is
discharged to filter backwash storage tank for equalization, solids settling and decanting operations. The
gravity thickened sludge from both the sludge storage tank and filter backwash storage tank will be
periodically disposed of by land application. The decanted water from the sludge holding tank and the filter
backwash storage tank will be de -chlorinated and discharged to the Unnamed Tributary to Sweetwater Creek
in Roanoke River Basin.
S. Describe the wastewater and the treatment process(es) for wastewater generated by the
facility:
The waste generated at the water treatment plant will include: (1) waste sludge from super pulsator clarifier,
(2) wastewater from filter backwash, filter to waste and sampling operations, and (3) waste from sanitary
facilities. (1) The waste sludge generated from the super pulsator sludge blown downs and overflow is
discharged to 529,300 gallon capacity sludge storage tank for gravity thickening and decanting operations.
(2) The wastewater generated from filter backwash, filter to waste, and sampling operations is discharged to
529,300 gallon capacity filter backwash storage tank for equalization, solids settling and decanting
operations. (3) The wastewater generated from the sanitary facilities at the water treatment plant will be
discharged to the Town of Williamston sewer system. The gravity thickened sludge from both the sludge
storage and filter backwash storage tanks is periodically disposed of by land application, using a private
contractor engaged in disposal of residuals by land application. The decants from the sludge storage tank and
the filter backwash storage tank is de -chlorinated and discharged to the Unnamed Tributary to Sweetwater
Creek in Roanoke River Basin:
9. Number of separate discharge points: 1
Page 2 of 4 Version 5/2012

NPDES PERMIT APPLICATION - SHORT FORM C - WTP
For discharges associated with water treatment plants
Outfall Identification number(s) 001
10. Frequency of discharge: Continuous ❑ Intermittent
If intermittent:
Days per week discharge occurs: 7 Duration: Variable
11. Plant design potable flowrate 2 MGD
Backwash or reject flow 0.7 MGD
12. Name of receiving stream(s): ATTACHMENT II
Outfall Location: 35°50'53.0667"N -77'02'39.2514"W
(Provide a map showing the exact location of each outfall, including latitude and longitude):
Discharging from said treatment works, at the location specified on the attached map, into an unnamed
tributary of Sweetwater Creek [Stream segment 23-50], a waterbody currently classified C waters
within Sub basin 03-02-09 of the Roanoke River Basin.
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
No X
Ammonia nitrogen / Chloramines
Yes X
No
Zinc -orthophosphate or sweetwater CP1236
Yes
No X
List any other additives below:
Sodium Permanganate ( NaMn04)
Powdered Activated Carbon (PAC)
Sodium Hydroxide (NaOH)
Polymer
Bleach (Chlorine).
Phosphoric Acid (SLI -PHOS 36)
14. Is this facility located on Indian country? (check one)
Yes ❑ No
15. Additional Information: ATTACHMENT III
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].
Page 3 of 4 Version 5/2012

NPDES PERMIT APPLICATION - SHORT FORM C - WTP
For discharges associated with water treatment plants
Solids Handling Plan - ATTACHMENT I
The sludge that is generated is pumped off to a truck loading facility 1 to 2 times per year
and is properly disposed of in a land application process. Granville farms is contracted to
handle this material and use their land application permit (WQ0035595) for proper
disposal.
16. NEW Applicants
Information needed in addition to items I-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.
David Bone Board Chairman
Pr' e ame of Pers Signing Title
Lqz
SiRnatu of Ap licant 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 4 of 4 Version 5/2012

ATTACHMENT I
SLUDGE MANAGEMENT PLAN
Martin County Regional Water and Sewer Authority
NPDES Permit NCO089435
There is one 529,300 gallon capacity filter backwash waste/filter to waste/sampling waste storage
tank and one 529,300 gallon capacity sludge storage tank, sludge loading pump station and decant
water pump station.
The wastes generated at the water treatment plant containing solids will include: (1) waste sludge
from the super pulsator clarifiers, (2) wastewater from the filter backwash, filter to waste, and
sampling operations, and (3) waste from the sanitary facilities at the water treatment plant..The waste
sludge generated from the super pulsator clarifiers will be discharged to the 529,300 gallon capacity
sludge storage tank for gravity thickening and decanting operations. The waste generated from the
filter backwash/filter to waste/sampling operations will be discharged to the 529,300 gallon capacity
filter backwash storage tank for equalization, solids settling and decanting operations. The total
estimated quantity of waste sludge from the super pulsator clarifiers and the filter backwash
operations is approximately 1,100 lbs/day, dry weight basis. The gravity thickened sludge (> 2.0
percent solids) from both the sludge storage and filter backwash storage tanks will be periodically
disposed of by land application at permitted sites, using a private contractor engaged in disposal of
residuals by land application. The MCRWASA will comply with all the requirements included in
residual permit for land application of the water plant residual. Granville Farms is using
(WQ0035595) permit to apply the residuals at this time.
The wastewater generated from sanitary facilities at the water treatment plant will be discharged to
the Town of Williamston sewer system.
h) CB &,r4 G

ATTACHMENT II
TOPOGRAGPHIC MAP

8" IS R
r I R.i f
T fBUTA
SWEE
EK rC
f
SLUDGE--/,-J
R ki*)TANK�,-
�
FILTEO
ST006GE T
W
1 1.0 0 TRE
PLAN
U1 -ST PU
N
0 -
N%
Martin County Regional
Water And Sewer Authority
Water Disposal to
Tributary of TTDecant
THE WOOTEN COMPANY
R,[,',h NC PEO] -1113
Sweetwater 0 500' 10DO'
Creek
I- �mm�rq� mm� 0

m
ATTACHMENT III
SCHEMATIC

� :i,
RAW vW.cp
A
ung ;,-SAWIth,
tri
a0o.cl�o DID
RUMF
2,10= CPO MAX. jt n
CPO Nuu� N". T R I's
LOX V 2 LIM
V1 MAX.
6a4�ia7 9TA7*4
.01 sc
�At
Olt, W., i
L�
W.W, GALL-
ELjc-IoD
Gpo
Rs, rx,.sTz!4 CRUX
2 LIZ
CAL*W wpu V.x
320, MO
�D MAY-
fA<Zalts,
Schematic Flow Diagram
...... ..... ..jj.
�cw UFT. . . . ..................... . . .......... ----- ........................
1;mvitz
A P"IL TM ��ARr,E(j 4CAErms"M 1,111,11 VARCII
,z ivt -,E WWA�l
ffL v
3 2C
TF3' h.
'Ton 2a`5 VACUI
m. -ERS tAuNy
UL 274-0 �W,
'z z W
10, I'll
ddd CpArc 1=
50.00 EL—k7
-0,0
4�.W 11P, ft E'),V i - I'll,
AC 1
001 CL410 Wr vL-V1,r7 C EL 7A aS 1 ZL.Zo
not CL-nAz
Ut
iNLET R.-
F3
%
16' 7.4
9W :R P-= EL -V.0 !01
Cp
MCRWASA WATER TREATMENT PLANT
HYDRAULIC PROFILE