NC0086011_Renewal Application_20181220

yy 4
�V � Nry
yP �11 55(( /lam
•
T�n i�
�l�ry.We4R v6M'U.�<�
ROY COOPER NORTH CAROLINA
Gases rear Environmental Quality
MICHAEL S_REGAN
Secretary
LINDA CULPEPPER
Interim Director
January 08, 2019
William C. Brewer
City of Winston-Salem
2799 Griffith Rd
Winston Salem, NC 27103-6417
Subject: Permit Renewal
Application No. NC0086011
Neilson WTP
Forsyth County
Dear Applicant:
The Water Quality Permitting Section acknowledges the December 20, 2018 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:
https://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,
Afifit Gte&
Wren Thedford
r Administrative Assistant
Water Quality Permitting Section
cc: Central Files w/application
ec: WQPS Laserfiche File Q-#)
North Carolina Department of Environmental Quality I Division of Water Resources
1617 Mail Service Center I Raleigh,North Carolina 27699-1617
919-807-6300

inston-Salem•Forsyth County Pat W.Swann Water Treatment Plant
`C /County UtilitiesCity of Winston-Salem T 336 727 8000
2800 River Ridge Road F 336 946 2574
Pfafflown, NC 27040 www cityofws org
Mr. Wren Thedford
NC Department of Environmental Quality—Division of Water Resources
NPDES Unit
1617 Mail Service Center
Raleigh,NC 27699-1617 RECEIVED/DENR DWR
Re: Renewal Notice DEC 2 0 2018
NPDES Permit#NC0086011
R.W.Neilson WTP Water Resources
Forsyth County P�rrnitting Section
Dear Mr.Thedford,
The City of Winston-Salem formally requests renewal of NPDES Permit#NC0086011 at our
R.W.Neilson Water Treatment Plant. As requested and required this letter serves as notification
of our intention to renew this permit.
The Neilson Plant is currently operating under a discharge waiver as requested by David
Saunders on October 11, 2011 (letter attached). The City of Winston-Salem has contracted with
Black&Veatch International to design a major upgrade of this facility which is currently at 90%
completion. It is anticipated this project will be bid in March of 2019 and the construction phase
will last approximately 36 months. As part of the design,the facility will have an equalization
basin and clarifier added to process water for discharge through our permitted outfall. Prior to
any discharge my staff will notify the Winston-Salem regional office and upon discharge will
commence sampling for the discharge as stipulated to ensure compliance with the permit.
Should you have any questions regarding this matter please do not hesitate to call me at(336)
945-1179.
Sincerely,
li,/✓Lr�"-a / // �//7
William C.Brewer Date
Water Treatment Superintendent
City Council:Mayor Allen Jollies,Vivian H Burke,Mayor Pro Tempore,Northeast Ward,Denise D Adams,North Ward,Dan Besse,Southwest Ward,Robert C Clark,
West Ward,John C Larson,South Ward,Jeff Macintosh,Northwest Ward,Annette Scippio,East Ward,James Taylor,Jr,Southeast Ward,City Manager Lee D Gamty
County Commissioners:David R Plyler,Chairman,Don Martin,Vice Chair,Fleming El-Amin,Ted Kaplan,Richard V Linville,Tonya McDaniel,Glona D Whisenhunt,
Call 311 or 336-727-8000 County Manager Dudley Watts,Jr
[e-mail] City/County Utility Commission:Randall S Tuttle,Chairman,L Wesley Curtis,Jr,Vice Chair,Harold E Day,Tom Griffin,Yvonne H Hines,Duane Long,Hugh W
Jernigan,Chris Parker,James Ruffin,Donald R Stewart,Allan Younger

Winston-Salem>Forsyth County
'City/County
Utilities October 18,2011
Water•Sewer a Solid Waste Disposal
Utilities Mr.Charles H.Weaver
Administration
NC DENR—Division of Water Quality
NPDES Section
City oFWinston-Salem 1617 Mail Service Center
P.O.Box 2511
Winston-Salem,NC 27102 Raleigh,NC 27699-1617
City Link 336.727.8000
Fax [phone] Re: Neilson WTP NPDES
wwwciryofvr.org
Permit#NC0086011
Dear Mr.Weaver,
The City of Winston-Salem requests a waiver from submitting Daily Monitoring Reports
for the Neilson Water Treatment Plant NPDES Permit#NC0086011 until such time that
this facility upgrades its waste system. We would like to keep this permit active, however,
we currently recycle all wastewater at this facility and do not discharge at this time.
Should you have any questions regarding this matter please do not hesitate to call me at
[phone].
Sincerely,
401.11°F
illeAm /
Dam . Sa nders
Director of t' ' es
Cc: Ron Boone,NCDENR-Division of Water Quality
Ron Hargrove,Deputy Director of Utilities
Bill Brewer,Water Treatment Superintendent
Rodney Darr,Neilson Water Plant ORC
C i t y Li n i c City Counall Mayor Men Jokes;Vivian H.Burke,Mayor Pro Tempore,Northeast Ward;Denise D.Adams,North Ward;Dan Besse,Southwest Ward,Robert C.Clark,War Wand,
p Molly Leight,South Ward;Wanda Merschel,Northwest Ward;Derwin I.Montgomery,Est Ward.James Taylor,Jr,Southeast Ward,City Manager:Lee D.Garrity
��f your lints to citU services)1
7�7�OOQ Forsyth County Commissioners;Richard V.Linville,Chairman;Debra Conrad,Vice Chair.Walter Marshall;David R.Plyler,Gloria D.W hisenhunt•,Bill Whirehearr,Everette
eityilnh@eityofws org Witherspoon,County Manager.Dudley Warn.Jr.
>request service a report s prou%m City/County Utility Commission David Neil,Chairman;James E.Lowe,Vice Chairman;Tuyoko-my-Beaty;Harold It.Holmes;Charles D.Jewell,ll;Janeen Lahk;Paul S.McGill;
>nabs a suggestion Al H.Seymour;Stephen M.Shelton;J.Hill Stockton;Randall S.Tuttle

NPDES PERMIT APPLICATION - SHORT FORM C - WTP
For discharges associated with water treatment plants
Mail the complete application to:
NCDEQ / DWR / NPDES
1617 Mail Service Center, Raleigh, NC 27699-1617
NPDES Permit Number NC0086011
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 Bill Brewer c/o City of Winston-Salem/Forsyth County Utility
Commission
Facility Name Neilson Water Treatment Plant
Mailing Address P.O. Box 2511
City Winston-Salem
State / Zip Code NC / 27040
Telephone Number [phone]
Fax Number [phone]
e-mail Address [e-mail]
2. Location of facility producing discharge:
Check here if same as above 0
Street Address or State Road 5725 Frye Bridge Road
City Clemmons
State / Zip Code NC / 27012
County Forsyth
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 City of Winston-Salem Division of Public Works-Utilities
Neilson WTP
Mailing Address 5725 Frye Bridge Road
City Clemmons
State / Zip Code NC / 27012
Telephone Number [phone]
Fax Number [phone]
4. Ownership Status:
Federal ❑ State 0 Private 0 Public El
Page 1 of 4 Version 6/2017

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)
The source for this facility is a low head dam and intake on the Yadkin River located at Idol's
Dam approximately 4 miles west of the plant.
7. Describe the treatment process(es) for the raw water:
Raw water from the Yadkin River is pumped to two raw water reservoirs (15 MG each for a total
of 30 MG of raw water storage). The raw water then flows by gravity into a 48.0 MG
conventional water treatment plant. Coagulation is achieved using aluminum sulfate followed
by flocculation, sedimentation and filtration. Sodium hypochlorite is added to the settled water
prior to filtration for disinfection. After filtration sodium hypochlorite is again added for
disinfection and to maintain chlorine residual. Zinc orthophosphate, hydrofluorosilicic acid and
caustic soda are added after filtration.
8. Describe the wastewater and the treatment process(es) for wastewater generated by the
facility:
Three (3) waste station pumps [6.48 MGD each for pumping back wash water to head
of water plant treatment process]
Two (2) lagoon decant pumps [0.58 MGD each for pumping lagoon decant to waste
station]
Three (3) residuals lagoons [-2.1 MG's each]
Neilson's sedimentation basins are currently cleaned manually and the solids are sent straight
to one of three residuals lagoons. Water is decanted off the top of the lagoon in service and is
pumped to the waste station via one of two 0.58 MGD waste pumps. All filter back wash water
at the Neilson Plant is currently recycled back to the head of the water plant treatment process
via a waste pump station that contains three 4,500 MGD pumps. Due to this the NPDES
discharge point is currently inactive. Neilson is plant is currently at 90% design review of an
upgrade that will be bid in March 2019. This upgrade will include the addition of an
equalization basin and clarifier for treating process residuals for land application. When the
upgrade is completed the plant will no longer recycle water but will start to use the permitted
discharge point. This is anticipated to begin sometime in 2020 or 2021.
9. Number of separate discharge points: 1 Outfall Identification number(s) Outfall 001
10. Frequency of discharge: Continuous ® Intermittent ❑
If intermittent:
Days per week discharge occurs: Duration:
11. Plant design potable flowrate 48.0 MGD
Page 2 of 4 Version 6/2017

NPDES PERMIT APPLICATION - SHORT FORM C - WTP
For discharges associated with water treatment plants
William C. Brewer Water Treatment Superintendent
Printed name of Person Signing Title
Signature of 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 4 of 4 Version 6/2017

NPDES PERMIT APPLICATION - SHORT FORM C - WTP
For discharges associated with water treatment plants
Backwash or reject flow 48.0 MGD
12. Name of receiving stream(s) (Provide a map showing the exact location of each outfall, including
latitude and longitude):
•
Unnamed tributary to Muddy Creek
13. Please list all water treatment additives, including cleaning chemicals or disinfection
treatments, that have the potential to be discharged.
Alum / aluminum sulfate Yes 4 No
Iron sulfate / ferrous sulfate Yes No 4
Fluoride Yes i No
Ammonia nitrogen / Chloramines Yes No 4
nc-orthophos ha - •r sweetwater CP1236 Yes ) No
List any other additives below:
50% Sodium hydroxide, powdered activated carbon and sodium hypochlorite.
New facility design uses same chemicals as current plant with the addition of calcium thiosulfate
used as a dechlorinating agent.
Fluorosilicic acid is used as fluoridating agent.
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 strongly recommended 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.
Page 3 of 4 Version 6/2017

Spills and Noncompliance Notification:
1. The Winston-Salem Regional Office,telephone number(336) 771-5000, will be notified
within 24 hours or the next working day following the occurrence or first knowledge of
the occurrence of any of the following:
i. Any occurrence with the distribution program which results in the land application of
significant amounts of wastes which are abnormal in quantity or characteristic.
ii. Any.failure of the distribution program resulting in a release of materials to receiving
waters.
iii. Any process unit failure, due to known or unknown reasons, that render the facility
incapable of adequate residual treatment.
2. Persons reporting such occurrences by telephone shall also file a written report in letter
form within(5) days following first knowledge of the occurrence. This report must
outline the actions taken or proposed to be taken to ensure that the problem does not recur.
3. Emergency Contacts: Neilson Water Treatment Plant [phone]
Gabriel Sparks,Plant Supervisor [phone] (M)
Bill Brewer, Water Treatment Supt. [phone] (M)
Winston-Salem/Forsyth County [phone]
Utility Administration
DEQ Regional Office [phone]
General Emergency 911
HazMat
Neilson Water Treatment Plant
Solids Handling Plan
Revised 12/01/2018
5

viii.If the slope of the land is greater than 10 percent when the bulk residuals are surface
applied, and if the slope of the land is greater than 18 percent when bulk residuals are
injected or incorporated.
ix. If pH maintained in the soil and residuals mixture is greater than 6.0.
x. If the land does not have an established vegetative cover.
xi. If the vertical separation of the seasonal high water table and the depth of the
residuals application is less than one foot.
xii. If the vertical separation of the depth to bedrock and the depth of residuals application
is less than one foot.
xiii.Application exceeds agronomic rates.
xiv. For residuals treatment and storage facilities,the following minimum setbacks shall
be adhered to:
Description of Setback Minimum Setback
(feet)
Habitable residence or place of public assembly under separate ownership or
not to be maintained as part of the project site 100
Property lines 50
Private or public water supply 100
Surface waters(streams,-intermittent and perennial,perennial water bodies,
_and wetlands) 50
Wells with exception to monitoring wells 100
2. When land applying bulk residuals to application site,the following minimum setbacks
are maintained at all times:
Setback By Type of Residual(feet)
Description of Setback I Liquid Cake
Private or public water supply 100 100
Surface waters(streams-intermittent and perennial,
perennial water bodies,and wetlands) 100 25
Surface water diversions(ephemeral streams,
waterways,ditches) 25 0
Groundwater lowering ditches(where bottom of
The ditch intersects SHWT) 25 0
Subsurface groundwater lowering system
Wells with exception to monitoring wells 100 100
Bedrock outcrops 25 0
3. Specific bulk residuals land application area boundaries are clearly marked on each land
application site prior to and during a residuals land application event.
Neilson Water Treatment Plant
Solids Handling Plan
Revised 12/01/2018
4

7. Proper records are maintained tracking all residuals activities. These records include the
source,volume, analysis, and recipient of the residuals.
8. Three copies,per application event, of all required monitoring and reporting requirements
are submitted annually before March 1,to NC DENR-DWQ.
Performance Standards:
1. The pollutant concentrations in any residuals that are land applied to any land application
site shall not exceed the following Ceiling and Monthly Average Concentrations (i.e.
dry weight basis):
Monthly Average Ceiling Concentration
Parameter Concentration (milligrams per kilogram)
(milligrams per kilogram)
Arsenic 41 75
Cadmium 39 85
Copper 1,500 4,300
Lead 300 840
Mercury 17 57
Molybdenum n/a 75
Nickel 420 420
Selenium 100 100
Zinc 2,800 7,500
2. If residuals are sold or given away, one of the Class A pathogen requirements in 15A
NCAC 02T .1106(b)must be met. Aerobic digestion is used to satisfy this requirement.
Application Requirements:
1. Bulk residuals are not applied under the following conditions:
i. If the residuals are likely to adversely affect a threatened or endangered species.
ii. If the application causes prolonged nuisance conditions.
iii. If the land fails to assimilate the bulk residuals or the application causes the
contravention of surface water or groundwater standards.
iv. If the land is flooded, frozen, or snow-covered or is otherwise in a condition such that
runoff of the residuals would occur.
v. During a precipitation event or within 24 hours following a rainfall event of 0.5
inches or greater in a 24-hour period.
vi. Within the 100-year flood elevation, unless the bulk residuals are injected or
incorporated within a 24-hour period following the residuals application event.
vii. During a precipitation event or within 24 hours following a rainfall event of 0.5
inches or greater in a 24-hour period.
Neilson Water Treatment Plant
Solids Handling Plan
Revised 12/01/2018
3

8. Once the sludge has dried, it is spread on the application site and a grass cover is planted
to stabilize the area.
Monitoring and Reporting Requirements:
1. Residuals generated by each source-generating facility must be analyzed to demonstrate
that they are non-hazardous. Sampling will be conducted by Rodney Darr, Sr. Water
Treatment Plant Supervisor, once per hauling event as described below.
2. An analysis is required for each residuals land application event.
3. Analyses made according to monitoring and reporting requirements must be certified for
the required parameter(s).
4. Corrosivity, ignitability, reactivity, and a Toxicity Characteristics Procedure analysis are
required with each residuals application event. The TCLP analysis includes the following
parameters (i.e.,note the regulatory level in milligrams per liter in parentheses):
Arsenic(5.0) 1,4-Dichlorobenzene(7.5) Nitrobenzene(2.0)
Barium(100.0) 1,2-Dichloroethane(0.5) Pentachlorophenol(100.0)
Benzene(0.5) 1,1-Dichloroethylene(0.7) Pyridine(5.0)
Cadmium(1.0) 2,4-Dinintrotolulene(0.13) Selenium(1.0)
Carbon tetrachloride(0.5) Endrin(0.02) Silver(5.0)
Chlordane(0.03) Hexachlorobenzene(0.13) Tetrachloroethylene(0.7)
Chlorobenzene(100.0) Heptachlor(and its hydroxide)(0.008) Toxaphene(0.5)
Chloroform(6.0) Hexachloro-1,3-butadiene(0.5) Trichloroethylene(0.5)
Chromium(5.0) Hexachloroethane(3.0) 2,4,5-Trichlorophenol(400.0)
m-Cresol(200.0) Lead(5.0) 2,4,6-Trichlorophenol(2.0)
o-Cresol(200.0) Lindane(0.4) 2,4,5-TP(Silvex)(1.0)
p-Cresol(200.0) Mercury(0.2) Vinyl chloride(0.2)
Cresol(200.0) Methoxychlor(10.0)
2,4-D(10.0) Methyl ethyl ketone(200.0)
5. Analyses of the following parameters are also required with each application event:
Aluminum Magnesium pH
Ammonia-Nitrogen Mercury Plant Available Nitrogen
Arsenic Molybdenum (by calculation)
Cadmium Nickel Selenium
Calcium Nitrate-Nitrite Nitrogen Sodium
Copper Phosphorous %Total Solids
Lead Potassium TKN
Zinc
6. Data to verify pathogen reduction and vector attraction reduction of the residuals is
maintained on file for five years. The required data is specific to the stabilization process
utilized, and is also sufficient to demonstrate clear compliance with the Class A pathogen
requirements and restrictions noted in 15A NCAC 02T .1106 (a) and (b) and vector
attraction reduction requirements in 15A NCAC 02T .1107 (a).
Neilson Water Treatment Plant
Solids Handling Plan
Revised 12/01/2018
2

R.W. Neilson Water Treatment Plant
Solids Handling Plan
The Neilson Water Treatment Plant is a 48 MGD water treatment facility. Solids are
generated by manual sludge removal from sedimentation basins, backwashing filters, and
filter-to-waste after filter backwashes are completed. Solids produced from filter backwashes
and filter-to-waste is routed to a waste pump station and is then pumped to the head of the
' water treatment process. Solids removed from the sedimentation basins are routed directly to
one of three residual lagoons.
Permits and Classifications:
1. The discharge from the residuals lagoons is authorized by NPDES Permit NC0086011.
The classification for the discharge is Grade 1 Physical/Chemical.
Operation:
1. The system consists of a waste station with (3)Fairbanks Morse single stage pumps rated
at 6.48 MGD each, (2)Fairbanks Morse basin sludge pumps rated at 1.0 MGD each, (2)
lagoon pumps rated at 0.65 MGD each and (3)residuals lagoons (3 lagoons at -2.0 MG).
Each residuals lagoon consists of an oval earthen lagoon with clay bottom.
2. Routine inspections of equipment will be conducted by Rodney Darr, Sr. Utility Plant
Supervisor,to ensure proper operation of equipment. Any equipment not functioning
properly will be reported through the water division's asset management program,
MAXIMO,to the appropriate support group for repair/replacement.
3. Backwash and filter-to-waste water from the plant process flows to the waste station and
then is pumped by the waste station pumps to raw water reservoir#2 at the head of the
plant treatment process.
4. All sedimentation basin and hopper blow downs are pumped by the basin sludge pumps
directly to one of three residuals lagoons.
5. The solids stream enters on one end of each lagoon and the decant is pumped from the
opposite end by the lagoon pumps to the waste station where it is returned to the head of
the treatment process.
6. Residuals lagoons are rotated with one cleaned and ready for use, one in service and one
drying at all times.
7. Residuals are removed from the lagoons and hauled to an application site which consists
of—31 acres on Cooper Road (about 1.0 mile from the Neilson WTP)by a private
contractor.
Neilson Water Treatment Plant
Solids Handling Plan
Revised 12/01/2018
1

R.W Neilson Water Treatment Plant
Water System Facility ID=TP2
Production Capacity=48.0 MGD
City of Winston-Salem I Yadln River)
NPDES#=NC0086011
100aMOD
1 Idol's Raw Water Pump Station
•
Raw Water Reservoir Raw Water Reservoir outtall 001
15 0 MG 15 0 MG 1 I (Currently Inactive)
A
48 0 MOD ► 4 20 0 MOD
Chlonne ►
Caustic Soda/Lime ► 48 0 MOD I►
Alum ♦
Coagulation
Waste Pump Station
(3)4,500 GPM Pumps 4
Flocculation 1 18 MOD —►
20MOD
Lagoon
(3)Residuals Decant
Sedimentation Basins �► Lagoons —+ (2)400 —
GPM
Chlonne _ Pumps
Filtration Filter Backwash
Filter to Waste
Caustic Soda/Lime ► 48 0 tern
Fluonde ►4 48 0 MOD
Chlonne -- ►
Ortho-phosphate - ►
{
10MG 10MG
Clearwell Clearwell
{ {
1.0 MG 1 0 MG
Clearwell Clearwell Entry Point-EP2
Distribution
System J