NC0079821_Renewal (Application)_20211115

ate,SEAT(
ROY COOPER '
Governor
ELIZABETH S.BISER
Secretary a'^'" }
S.DANIEL SMITH NORTH CAROLINA
Director Environmental Quality
November 15, 2021
City of Winston-Salem
Attn: Courtney L. Driver, Utilities Dir.
PO Box 2511
Winston Salem, NC 27103-6417
Subject: Permit Renewal
Application No. NC0079821
R.A. Thomas WTP
Forsyth County
Dear Applicant:
The Water Quality Permitting Section acknowledges the November 15, 2021 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,
t.
Wren Thedford
Administrative Assistant
Water Quality Permitting Section
ec: WQPS Laserfiche File w/application
DENorth Carolina Department of Environmental Quality I Division of Water Resources
�0.
Q J/ Winston-Salem Regional Office 450 West Hanes M ll Road Suite 300 Winston-Salem.North Carolina 27105
336.776.9800

EPA Identification Number NPDES Permit Number Facility Name Form Approved 03/05/19
N/A NC0079821 R.A Thomas WTP OMB No.2040-0004
U.S.Environmental Protection Agency
FORM Application for NPDES Permit to Discharge Wastewater
2E p
NPDES �� r MANUFACTURING,COMMERCIAL, MINING,AND SILVICULTURAL FACILITIES WHICH
DISCHARGE ONLY NONPROCESS WASTEWATER
SECTION 1.OUTFALL LOCATION(40 CFR 122.21(h)(1))
1.1 Provide information on each of the facilit 's outfalls in the table below.
Outfall
0 Receiving Water Name Latitude
Number Longitude
0 001 Unnamed tributary to -80` 13' 5.406' W
7
0
SECTION 2.DISCHARGE DATE(40 CFR 122.21(h)(2))
2.1 Are you a new or existing discharger?(Check only one response.)
as cu El New discharger ❑✓ Existing discharger 4 SKIP to Section 3.
N o 2.2 Specify your anticipated discharge date:
SECTION 3.WASTE TYPES(40 CFR 122.21(h)(3))
3.1 What types of wastes are currently being discharged if you are an existing discharger or will be discharged if you are a
new discharger?(Check all that apply.)
❑ Sanitary wastes ❑✓ Other nonprocess wastewater(describe/explain
ElRestaurant or cafeteria waste directly below)
Q ❑ Non-contact cooling water WTP process wastewater
I— 3.2 Does the facility use cooling water additives?
❑ Yes ❑✓ No 4 SKIP to Section 4.
3.3 List the cooling water additives used and describe their corn•osition.
Cooling Water Additives Composition of Additives
(list) (if available to you)
SECTION 4.EFFLUENT CHARACTERISTICS(40 CFR 122.21(h)(4))
4.1 Have you completed monitoring for all parameters in the table below at each of your outfalls and attached the results to
this application package?
❑ Yes ❑✓ No;a waiver has been requested from my NPDES permitting authority
(attach waiver request and additional information) 4 SKIP to Section 5.
4.2 Provide data as requested in the table below.1 (See instructions for specifics.)
. Number of Maximum Daily Average Daily Source
Parameter or Pollutant Analyses Discharge Discharge (use codes
'z (if actual data (specify units) (sped units) per
0 reported) Mass Conc. Mass Conc. instructions)
Biochemical oxygen demand(BOD5) Not required
Total suspended solids(TSS) 56 20.0 3.4 2-D
CD
Oil and grease Not required
Ammonia(as N) Waiver
Discharge flow Daily 3.07 MGD 1-Q
pH(report as range) 6.0-7.2 2-D
' Temperature(winter) Not required
Temperature(summer) Not required
1 Sampling shall be conducted according to sufficiently sensitive test procedures(i.e.,methods)approved under 40 CFR 136 for the analysis of pollutants or pollutant
parameters or required under 40 CFR chapter I,subchapter N or 0.See instructions and40 CFR 122.21(e)(3).
EPA Form 3510-2E(revised 3-19) P/b0114 Ad` f'lhdd.GJ for 'G`1.-°n 1 D Page1
.

EPA Identification Number NPDES Permit Number Facility Name Form Approved 03/05/19
N/A NC0079821 R.A Thomas WTP OMB No.2040-0004
4.3 Is fecal coliform believed present,or is sanitary waste discharged(or will it be discharged)?
❑ Yes ❑✓ No-> SKIP to Item 4.5.
4.4 Provide data as requested in the table below., (See instructions for specifics.)
Number of Maximum Daily Average Daily Source
Parameter or Pollutant Analyses Discharge Discharge (Use codes
(if actual data (specify units) (specify units) per
reported) Mass Conc. Mass Conc. Instructions.)
Fecal coliform
0 E.coli
CD
= Enterococci
`0 4.5 Is chlorine used(or will it be used)?
w El Yes El No- SKIP to Item 4.7.
H 4.6 Provide data as requested in the table below., (See instructions for specifics.)
Number of Maximum Daily Average Daily Source
as
Parameter or Pollutant Analyses Discharge Discharge (use codes
- (if actual data (specify units) (sped units) per
reported) Mass Conc. Mass Conc. instructions)
c
Total Residual Chlorine 67 20.0 7.9 2-F
w 4.7 Is non-contact cooling water discharged(or will it be discharged)?
O Yes ❑✓ No 4 SKIP to Section 5.
4.8 Provide data as requested in the table below., (See instructions for specifics.)
Number of Maximum Daily Average Daily Source
Parameter or Pollutant Analyses Discharge Discharge (use codes
(if actual data (specify units) (specify units) per
reported) Mass Conc. Mass Conc. instructions)
Chemical oxygen demand(COD) Not required
Total organic carbon(TOC) Not required
SECTION 5.FLOW(40 CFR 122.21(h)(5))
5.1 Except for stormwater water runoff,leaks,or spills,are any of the discharges you described in Sections 1 and 3 of this
application intermittent or seasonal?
❑ Yes 4 Complete this section. ❑✓ No 4 SKIP to Section 6.
33 5.2 Briefly describe the frequency and duration of flow.
c.
SECTION 6.TREATMENT SYSTEM(40 CFR 122.21(h)(6))
6.1 Briefly describe any treatment system(s)used(or to be used).
E
ySee information provide in EPA Form 1 Section 8 Nature of Business
>+
C
Cl
E
Cl
Cl
H
'Sampling shall be conducted according to sufficiently sensitive test procedures(i.e.,methods)approved under 40 CFR 136 for the analysis of pollutants or pollutant
parameters or required under 40 CFR chapter I,subchapter N or 0.See instructions and 40 CFR 122.21(e)(3).
EPA Form 3510-2E(revised 3-19) Page 2

EPA Identification Number NPDES Permit Number Facility Name Form Approved 03/05/19
N/A NC0079821 R.A Thomas WTP OMB No.2040-0004
SECTION 7.OTHER INFORMATION(40 CFR 122.21(h)(7))
7.1 Use the space below to expand upon any of the above items. Use this space to provide any information you believe the
reviewer should consider in establishing permit limitations.Attach additional sheets as needed.
The R.A.Thomas WTP is a conventional water treatment plant.Analysis such as BOD,COD,TOC,ammonia and
temperature are not required under our current permit(nor have they ever been).
E
8
t
O
SECTION 8.CHECKLIST AND CERTIFICATION STATEMENT(40 CFR 122.22(a)and(d))
8.1 In Column 1 below, mark the sections of Form 2E that you have completed and are submitting with your application.
For each section,specify in Column 2 any attachments that you are enclosing to alert the permitting authority.Note that
not all applicants are required to provide attachments.
Column 1 Column 2
❑✓ Section 1:Outfall Location ❑ w/attachments(e.g., responses for additional outfalls)
❑✓ Section 2:Discharge Date ❑ wl attachments
❑✓ Section 3:Waste Types ❑ wl attachments
❑✓ Section 4:Effluent Characteristics ❑ w/attachments
❑✓ Section 5:Flow ❑ w/attachments
cn
o ❑✓ Section 6:Treatment System ❑ wl attachments
47-cu
❑✓ Section 7:Other Information ❑ w/attachments
cu
�' ❑✓ Section 8:Checklist and Certification Statement ❑ w/attachments
8.2 Certification Statement
1 certify under penalty of law that this document and all attachments were prepared under my direction or supervision in
accordance with a system designed to assure that qualified personnel properly gather and evaluate the information
submitted.Based on my inquiry of the person or persons who manage the system,or those persons directly
responsible for gathering the information,the information submitted is, to the best of my knowledge and belief,true,
accurate,and complete. I am aware that there are significant penalties for submitting false information,including the
possibility of fine and imprisonment for knowing violations.
Name(print or type first and last name) Official title
Courtney L.Driver Utilities Director
ign ture Date signed
1/0 • Olq * ac0,1
EPA Form 3510-2E(revised 3-19) Page 3

Winston-Salem/Forsyth County
4or
LJti 1 ities
Water•Wastewater•Solid Waste
Administration,P.O.Box 2511,Winston-Salem,NC 27102
0:336-727-8000, F:336-727-8432,wsfcutilities.org
October 29, 2021
John Hennessy
North Carolina Department of Environmental Quality RECEIVED
Water Quality Permitting Section—NPDES
1617 Mail Service Center ,\ � 5 2021
ITV 1
Raleigh, NC 27699-1617
NCDEQIDWRINPDES
Dear Mr. Hennessy,
Enclosed please find the City of Winston-Salem's permit renewal package for the R.A.Thomas Water
Treatment Plant's NPDES Permit No. NC0079821.This renewal package includes the EPA NPDES Forms
1, 2E and 2C.
Please note the following regarding the forms.
EPA Form 2C Section 7 Table A.—As a water treatment facility, our NPDES sampling requirement has
never included biochemical oxygen demand (BOD5), chemical oxygen demand (COD), total organic
carbon (TOC)or temperature so "Waiver Requested" for these parameters as there was no other
option.Testing for ammonia is done on a quarterly basis to satisfy our quarterly total nitrogen sampling
requirement but the monthly requirement has been waived because our system uses free chlorine as
opposed to chloramines. "Waiver Requested" was selected for ammonia also to retain our current
sampling requirement.
EPA Form 2E Section 4.2 Data—Data for this section is included with the tables supplied for EPA Form
2C Section 7 supporting data.
Should you have any questions regarding the application for renewal please contact Bill Brewer at(336)
397-7727. 1
cerely, '
Courtney L. ri
Utilities Director
Attachments: EPA Form 1
EPA Form 2C with supporting documentation
EPA Form 2E with supporting documentation
City Council:Mayor Allen Joines;Denise D.Adams,Mayor Pro Tempore,North Ward;Barbara Hanes Burke,Northeast Ward;Robert C.Clark,West Ward;
John C.Larson,South Ward;Jeff Macintosh,Northwest Ward;Kevin Mundy,Southwest Ward;Annette Scippio,East Ward;James Taylor,Jr.,Southeast Ward;
EMMID
City Manager:Lee D.Garrity
County Commissioners:David R.Plyler,Chair;Don Martin,Vice Chair;Fleming El-Amin;Ted Kaplan;Richard V.Linville;Tonya McDaniel;Gloria D.Whisenhunt;
Call 311 or 336-727-8000 County Manager:Dudley Watts,Jr.
Winston-Salem/Forsyth County Utility Commission:Randall S.Tuttle,Chair;L.Wesley Curtis,Jr.,Vice Chair;Harold E.Day;Tom Griffin;Yvonne H.Hines;
[e-mail] Duane Long;Hugh W.Jernigan;Chris Parker;Charles Wilson;Allan Younger

EPA Identification Number NPDES Permit Number Facility Name Form Approved 03/05/19
N/A NC0079821 R.A.Thomas WTP OMB No.2040-0004
Form U.S.Environmental Protection Agency
1 `y EPA Application for NPDES Permit to Discharge Wastewater
NPDES C�/`1 GENERAL INFORMATION
SECTION 1.ACTIVITIES REQUIRING AN NPDES PERMIT(40 CFR 122.21(f)and(f)(1))
1.1 Applicants Not Required to Submit Form 1
Is the facility a new or existing publicly owned Is the facility a new or existing treatment works
1.1.1 1
treatment works? 1. .2 treating domestic sewage?
If yes,STOP. Do NOT complete ❑✓ No If yes,STOP. Do NOT ❑✓ No
Form 1.Complete Form 2A. complete Form 1.Complete
Form 2S.
1.2 Applicants Required to Submit Form 1
w 1.2.1 Is the facility a concentrated animal feeding 1.2.2 Is the facility an existing manufacturing,
operation or a concentrated aquatic animal commercial,mining,or silvicultural facility that is
production facility? currently discharging process wastewater?
oElYes 4 Complete Form 1 ❑✓ No �✓ Yes 4 Complete Form ElNo
a and Form 2B. 1 and Form 2C.
0 1.2.3 Is the facility a new manufacturing,commercial, 1.2.4 Is the facility a new or existing manufacturing,
mining,or silvicultural facility that has not yet commercial,mining,or silvicultural facility that
= commenced to discharge? discharges only nonprocess wastewater?
❑ Yes 4 Complete Form 1 ❑✓ No ❑ Yes 4 Complete Form No
co
and Form 2D. 1 and Form 2E.
°; 1.2.5 Is the facility a new or existing facility whose
discharge is composed entirely of stormwater
a associated with industrial activity or whose
discharge is composed of both stormwater and
non-stormwater?
❑ Yes 4 Complete Form 1 ❑✓ No
and Form 2F
unless exempted by
40 CFR
122.26(b)(14)(x)or
b 15 .
SECTION 2.NAME,MAILING ADDRESS,AND LOCATION(40 CFR 122.21(f)(2))
2.1 Facility Name
R.A.Thomas Water Treatment Plant
2.2 EPA Identification Number
U
o N/A
2.3 Facility Contact
ch-
Name(first and last) Title Phone number
William C Brewer Water Treatment Superintendent [phone]
Email address
[e-mail]
2.4 Facility Mailing Address
Street or P.O.box
P.O.Box 2511
City or town State ZIP code
Winston-Salem NC 27107-9998
EPA Form 3510-1(revised 3-19) Page 1

EPA Identification Number NPDES Permit Number Facility Name Form Approved 03/05/19
N/A NC0079821 R.A.Thomas WTP OMB No.2040-0004
h d 2.5 Facility Location
c Street,route number,or other specific identifier
Q U 1201 S.Martin Luther King,Jr.Drive
rn
c c County name County code(if known)
al Tu. Forsyth
0
E City or town State ZIP code
z Winston-Salem NC 27107
SECTION 3.SIC AND NAICS CODES(40 CFR 122.21(f)(3))
3.1 SIC Code(s) Description(optional)
4941 Conventional Water Treatment Plant
GJ
0
0
U
N
z 3.2 NAICS Code(s) Description(optional)
221310 Conventional Water Treatment Plant
U
ti
SECTION 4.OPERATOR INFORMATION(40 CFR 122.21(f)(4))
4.1 Name of Operator
Donna M Lankford
0 4.2 Is the name you listed in Item 4.1 also the owner?
❑ Yes ❑✓ No
4.3 Operator Status
R ❑ Public—federal ❑ Public—state 0Other public(specify)Municipally Owip
o ❑ Private 0 Other(specify)
4.4 Phone Number of Operator
[phone]
4.5 Operator Address
Street or P.O.Box
(o
E 0 1201 S.Martin Luther King,Jr.Drive
`o $
w City or town State ZIP code
o 0 Winston-Salem NC 27107
m
0_ Email address of operator
[e-mail]
SECTION 5.INDIAN LAND(40 CFR 122.21(f)(5))
R 0 5.1 Is the facility located on Indian Land?
❑ Yes ❑✓ No
EPA Form 3510-1(revised 3-19) Page 2

EPA Identification Number NPDES Permit Number Facility Name Form Approved 03/05/19
N/A NC0079821 R.A.Thomas WTP OMB No.2040-0004
SECTION 11.CHECKLIST AND CERTIFICATION STATEMENT(40 CFR 122.22(a)and(d))
11.1 In Column 1 below,mark the sections of Form 1 that you have completed and are submitting with your application.
For each section,specify in Column 2 any attachments that you are enclosing to alert the permitting authority.Note
that not all applicants are required to provide attachments.
Column 1 Column 2
❑✓ Section 1:Activities Requiring an NPDES Permit ❑ wl attachments
❑✓ Section 2:Name, Mailing Address,and Location El w/attachments
❑✓ Section 3:SIC Codes El w/attachments
❑✓ Section 4:Operator Information ❑ w/attachments
❑✓ Section 5:Indian Land ❑ w/attachments
�. ❑✓ Section 6:Existing Environmental Permits ❑✓ w/attachments
w/topographic
❑✓ Section 7:Map ❑✓ map ❑ w/additional attachments
v7
o ❑✓ Section 8:Nature of Business ❑✓ wl attachments
ea
❑✓ Section 9:Cooling Water Intake Structures ❑ w/attachments
❑✓ Section 10:Variance Requests ❑ w/attachments
❑� Section 11:Checklist and Certification Statement ❑ w/attachments
d 11.2 Certification Statement
U
I certify under penalty of law that this document and all attachments were prepared under my direction or supervision
in accordance with a system designed to assure that qualified personnel properly gather and evaluate the
information submitted.Based on my inquiry of the person or persons who manage the system,or those persons
directly responsible for gathering the information,the information submitted is,to the best of my knowledge and
belief,true,accurate,and complete.I am aware that there are significant penalties for submitting false information,
including the possibility of fine and imprisonment for knowing violations.
Name(print or type first and last name) Official title
Courtney L.Driver Utilities Director
ign ture Date signed
•
10 .„2q. zap.1
EPA Form 3510-1(revised 3-19) Page 4

EPA Identification Number NPDES Permit Number Facility Name Form Approved 03/05/19
N/A NC0079821 R.A.Thomas WTP OMB No.2040-0004
SECTION 6.EXISTING ENVIRONMENTAL PERMITS(40 CFR 122.21(f)(6))
6.1 Existing Environmental Permits(check all that apply and print or type the corresponding permit number for each)
m NPDES(discharges to surface ❑ RCRA(hazardous wastes) ❑ UIC(underground injection of
water) fluids)
o w NC0079821
w a ❑ PSD(air emissions) ❑ Nonattainment program(CM) ❑ NESHAPs(CM)
w ❑ Ocean dumping(MPRSA) ❑ Dredge or fill(CWA Section 404) ❑✓ Other(specify)
WQ0031314
SECTION 7.MAP(40 CFR 122.21(f)(7))
7.1 Have you attached a topographic map containing all required information to this application?(See instructions for
specific requirements.)
❑✓ Yes ❑ No ❑ CAFO—Not Applicable(See requirements in Form 2B.)
SECTION 8.NATURE OF BUSINESS(40 CFR 122.21(f)(8))
8.1 Describe the nature of your business.
The R.A.Thomas WTP is a municipally owned and operated conventional drinking water treatment plant.This plant
uses aluminum sulfate as the primary coagulant,sodium hydroxide for pH adjustment,sodium hypochlorite for
ta
disinfection,fluoride for dental health and zinc orthophosphate to prevent pipe corrosion.The process includes
3 coagulation,flocculation,sedimentation,filtration and the post chemical addition noted above.
co
o See attachedprocess diagram and description for additional detailed information for theproduction of drinking
m g P
water and waste management system of the facility.
m
SECTION 9.COOLING WATER INTAKE STRUCTURES(40 CFR 122.21(f)(9))
9.1 Does your facility use cooling water?
d ❑ Yes ❑✓ No 4 SKIP to Item 10.1.
4-) 2
9.2 Identify the source of cooling water.(Note that facilities that use a cooling water intake structure as described at
a)b 40 CFR 125, Subparts I and J may have additional application requirements at 40 CFR 122.21(r).Consult with your
o d NPDES permitting authority to determine what specific information needs to be submitted and when.)
O Y
;° Not applicable
•
SECTION 10.VARIANCE REQUESTS(40 CFR 122.21(f)(10))
10.1 Do you intend to request or renew one or more of the variances authorized at 40 CFR 122.21(m)?(Check all that
apply.Consult with your NPDES permitting authority to determine what information needs to be submitted and
when.)
a ❑ Fundamentally different factors(CWA ❑ Water quality related effluent limitations(CWA Section
Section 301(n)) 302(b)(2))
R ❑ Non-conventional pollutants(CWA ❑ Thermal discharges(CWA Section 316(a))
Section 301(c)and(g))
❑� Not applicable
EPA Form 3510-1(revised 3-19) Page 3

Section 6: Existing Environmental Permits
NPDES Permit NC0079821
Land Application Permit WQ0031314

Section 7: Map
Topographic Map of R.A. Thomas WTP and Surrounding Area

UNITED STATES
,. DEPARTMENT OF THE INTERIOR a WINSTON-SALEM EAST QUADRANGLE
STATE OF NORTH CAROLINA NORTH CAROLINA
GEOLOGICAL SURVEY HIGHWAY AND PUBLIC WORKS COMMISSION 7.5 MINUTE SERIES(TOPOGRAPHIC)
e`'&MIS~ PLarWr qe vl 1 ' _ _ eR:;w 7 ` IS n Ia.oaao rELr / 80.07.30..N.Y.-E. I w
36.07.30 .ie y 4 -. A • -r•, •��— �- -- - _ - 1' �- -7--" --- .,... �;1 " —• -�--.3ero7•ao..
M ,r a,' r -- 1-- — aRE, / p�
y y to if6 �h '�.. n "' ' �.a„ ‘ ,;i{I
4 r" „l;�tdJ id IAA r �....,. _ e . }Park Terrace 7i�;•r . .•Y • • �
gt 1 .� ri i , o,Nrl.a t}t=ul:.• yu ya 0;u j IM.L L w Myer, _
C�'' •, 1i.yg5 ^yWo-• FLar.�y y r y.a a)' P IT'.E R N. E 13t H V I L 1, E
y .4, •P, �C I J ! F�, 1.
l� IT R - v
MN yrA .. _
•
II 111V i" . I `i ` '� r'`Fqw,. ) - -
4.•f• /° ' I
- .z0000
91/I� l a . �., / / .. ivito H
Aug.
I `8�uo1: [l, i, r 1 Net Sra so: a� — _
h lit r3O. PI
a 9 l w s..a:.r y a14 .E• • ye;),
iC yy lL n - - E '.eag,a '.es • ..:.LL Bow Y - 1.- :•ter• 1t' A:. 4- ,,. fi •s'�. I It ' .Sch . •y• '' 1
;1 letkir
w
iry
ilia, •
• ■ � \a �0 L •• a4P � ' •� . ` � ,� . IRlI1i•
-.vile, . � Y I (
m.* ,,r-, �..,-. ' A • • \, . .
•
• .• , • 4 )1. i 110•41, .„4; A i 0'.4 II,
py� �.
.. ‘' .! r,' :-. ..! . '',!., . !. . a ,L,. .--,,,..f.,,,1 2. -zglio . .,,,,... 13
�. }J y y
i1 Ilk
•
•
lir
a 'ialy$_ A it1'i•Al •�I�.' o-�••f Y ) , ••°5>• • ..x,;:°-•-s: .. ,,,,,• -•• . r ^ .I
. �a� `>b ir• r 011 Is- '{�, ,, L •.k.. :F aw `7 r �tryy>` .tom It ? >Ar� ,
, VO-•
i C A�t ien�d ,�5.-...i..- ' 'i #. 'e � f ;I , '[•Wean,, I 'li v5 '!` t t a.,f \) (�.,,Y"�iR ! +u
gig , •. 'M®Lrn�4Mo�.a� a re / .7 a! •�`\ :1 •
i- Ii �E 2 �t.,�w'.�q� ���•�.�.��,�. t>. {16e. f:a e'gm : '!_ x., 'rh�. :•v �•,, _1 �`,r , r `
• 'tea ►���P �17IR• .� t �f I \ `,
�P s.. i K'h .,�gsw•,XII �� Y 'ID• �„Cr `. J x, -` .q`� �j/ •\ •�S •'1 y`��'I /:'
I I ail `, r\ .1, I QI. ���-- '''. r• N ¢ j"
y,": IlkRL �;y.t 1
•lea YI III ,
4 4 if 4 -'1 H s/' 0 '''"--' ' '' .-
p ,_ 1 / ,,•t• ,•t1 ,. . , IL,4,,, ,d,.. iii.''N' ` '. ., fir `.._•Z-,.., 1. `
1 1 I I �� • u�P. •� �' l• I f;)M fit. an i�:' �\`` r
y 1 414 ` 1 +I; l ,
IL
Y •.1. ,i -:,Les,Sada ir ,... '.-;�•;•
.,�•� PN i I \ \.• .. �KjIIj / ' - 1 �, _ O ax ee� �� `6Y
I !. a 3F� - t' � •1�+ M � •.jam... o€
, ,r4t-::- -,_i-;.,,,,,,,tv:,,,,itt',.f::..._,--:.peet),:.,i,' _ am-Mt:_,,,,_.:.:':
'?7 P
Y` I
,,��11�-
�f i� �r •f `tom •
.i :.'"P' •\ `\\\I`, �l I'--, ,Air A Free
\: 1
' _•i ±.�.• .31udd9 .1 ' Ix. "; •
`, ` j11 '!lam r'� `I;! 1�, • r,l ., ,/ I
•
.M :( Z.A.. 'n '¢� ate' '! % p 1111 ( �� � i'��0
>w/I •.' c -0',1• •i _ jri--- �-�' i —''. • "'a' AV Ma 4 -riff'''. INI 4,'S' ft �,�'�
NO� �Lr, '1t - Nr r N.+17, V.I.
,` i • I 1 r. ,. p 1$]Ll�f - 'I `— `�� •I
.,
.• '� t �, 1 '.. s ,I ILl, '� .A'^, t �tiS�T�T'S 4
'./ 1 {" v .� 6 \\ ail , I
•
e6{[[ L aft 1 - • N 1 ii,
[•r, 01-��;kk " N' � yl,
IcP•. e ;' -- - -° _1 .. _ • . ,.,-• , ,.,•., Tory+, '4r y �� 1 .?1', '•?i! .•.. I
d
•
cos ---,e_
u ,
++ �Jt •S
T \CIt
I �I t ' O \ \pt 1 1y 11{I / `` •. C. A �;�\1 ``''�- _•I 'd, t, A.
f 44FK -,T• t D w A 1,'1:1,,1H , ►J-�'I,.y 1 r •
j"�`Z '. �t
, ,, , i, • e 4i1,-,.. . 34,,„,e1/4,-....„„,,,,, .
..,„,.
,,' ,- Ciiii4'vie.
I.
,,'_ .,.., . ter,...70,,446\4,-- ".-.....”-..,,lik,.. )' IIP,.,rgis\ - ,x). ‘44svir.4:::' ' ..-- ' ' —I '4:' ''.....r: '!
,-- 1,4; 154- ' ( ,,,i(s, ,
1
1
1
1
„, ...__,._. , ,... __,.., t .,_ ...
..„ ..:
36.00�. "+ L F ..__-�`aek - ct - yEF J' L _- --/ C;M1, �:7id¢LI �, (� NA ••,,, .4•21 otiek `fiCf/. �•:
80.15' V TNR {, . • m Ir. 1730" i,. .... "w •N MY NI •• •• r.:.7. "f 30”
80.0730"
Mapped,edited,and published by the Geological Survey ,L 91...4 A.
Control by USGS,USC&GS,and North Carolina Geodetic Survey SCALE 1.2a OOD ROAD CLASSIFICATION
e I p .=r,---- ,------��w" Hew?duty Light duty Culture and drainage in pert corroded from b.-l:- - _. - "• gn --
sere photographs ,I c� IOW __ --_—L �,u' Madium.dutye " Unimproved dirt �s'`s
p graphs I. 19d8 I "'
Topography by plsne table methods 1949-1950 II { - ,tfe D6DG C U S Route (7,State Route
.tx..-.a-.a ...:.:
Polyconic projection 1977 North American datum aR4'' -v H �-- i Historical Flt•
1000 fool arid bated on North Caroline coadinote system
" ' 'w�: Topographic DlrldoN 1a',ICAI,;
Red lint indicates are.m Rnwh nnIt I CONTOUR INTERVAL IO EEET
Iaodrna buildings be shown Horde IS ROeS SG LEVEL 5
IOOOmeta unLe,.,l Transverse Merc.mr gnd tit,.. WINSTON-SALEM EAST.N.C. 19�5
:one I7 shown in blue ncL�A,r'oA,r nrn•e,s•LLI HAS ,P COMPLIES Wall RATIONAL M,P ACCURACY StAHrARCS N3fi00--W8007.5/7 5 ,-„-1 TJT cn
FOR SALE WI U.S.GEOLOGICAL SURVEY,WASHINGTON.D.C.20242 1950 "•�-�' -. '''III
A MAMA DESCRIBING TOPOGRAPHIC MAPS AHD SYMBOLS IS AVNLAaLE OH REQUEST ���,-t /��c\I n��,/
AM..•»S II SW-SERIES VS•x �(' II''vt^J 1�ILf✓r)\'lll/
.11 nn1¢lii

— ..,„ - (rt
iieivs
ii ,, 1 �,:, _ O utfa 11001NI
_,..,, rsoilik- - ,...:.-.....-,..,_ ......,==:__,
N PDES N 0079821
„a
l:.:'-
-# ,' i ,
,cti- tolin=il
R.A. Thomas WTP w
k t ' "i r §fig .°*L r- ," ' ,
1p
. , .... . , D
itiii
x
r
J
' \:
, „
H-.:---":1!7......--,...---19411,," ';:1-
. 0 tr ' \ 0i, # 1#+plP;�' w to ° • ` y j �..et.e." \ fi, 0 I,'[ \ ----%:' ,
;A': pia ,� 1 i 1 9 R N. R #
1 �� ` .. fir (
,.—-s i e a i *.# el(
,Ke..�.,aa. ...a t r .d' I�. _
ti
ta, . 4100,.., : -.0.,. -:-1„,:c ! , i
i,� VI% I ' ' ' ,. ' \ " ^ i
a
q7 ,
e I ' 'II* I II 's, No. a, '-• - N
MAs„s,‘ i #1...' '#i t , 4 # '' #, 1 ,„, „,
',,,,— , ,4„,4 , .,0..i, . r.,..— _, )1, 1, 1 #1000"askr,4 ep.ilm. .,:‘ s
I. ,,,. 411 1 4 :(1(1: ,,!Li„,-_,.:'I/ ''''N'It. '' I I ' \..s.t. '......,,s I*, I i ,„. r 7
1 ler"#-'.-- #"ts.
g' lei
'' 1 S t ,,,,, ,1.6,1., ,,s*,, A. ''' ''. ° It
� .�1 Y A ',A.: 'p NA : - -
1

Section 8: Nature of Business
R.A. Thomas WTP Process Diagram
R.A. Thomas WTP Process Description

R.A. Thomas Water Treatment Plant
Water System Facility ID = TP1
Production Capacity = 18.0 MGD
City of Winston-Salem
NPDES ID# = NC0079821
Potassium
Permanganate 10.0 MGD 12.0 MGD
mL k Billion SaIe Lake 1 0 B Ilion
Yadln River via Neilson WTP
\Gal ► Common Header /
\lon Raw Water Reservoir \Raw Water Reserviors
Alum ► //
Caustic ►t 18.0 MGD
Chlorine ►
•
Coagulation (2)1.76 MG Residuals Lagoons
V
11 Flocculation
Residuals Residuals Pump Station
(3)200 GPM Pumps
•
Sedimentation Basins
O
Chlorine ► a
L
V cc
Polymer
Filtration
Backwash and Washwater
Filter to Waste
► EQ Basin
Chlorine ► 0.55 MG
Fluoride 18.0 MGD
Zinc OrthoPhosphate ►
Caustic ►
♦ (4)-1.12 MGD Pumps ►
Max Flow=4.5 MGD
1.5 MG Clearwell
Washwater
•
Clarifier
1.5 MG Clearwell 4.5 MGD •
Discharge Outfall 001
Entry Point-EP1 ► 24.0 MGD
•
Distribution
System \

R.A. Thomas Water Treatment Plant
Water System Facility ID = TP1
Production Capacity = 18.0 MGD
City of Winston-Salem
NPDES ID# = NC0079821
Description of source water(s): The sources for the R.A. Thomas WTP are Idol's Dam (via the Neilson WTP
raw water reservoirs) on the Yadkin River located approximately 11 miles west of the plant and Salem Lake
located approximately 4 miles east of the plant. The R.A. Thomas WTP can treat either source independently
or a combination of the two sources.
Description of the treatment process: Raw water is pumped from the Yadkin River to the raw water
reservoirs located at the R.W. Neilson WTP and then flows by gravity to the R.A. Thomas WTP. Water from an
intake at Salem Lake flows by gravity to the R.A. Thomas Plant. The plant can treat either source
independently or a combination of both sources in the desired proportion as determined by the plant operators
based on raw water quality. The plant uses conventional treatment of coagulation with aluminum sulfate,
flocculation, sedimentation, filtration followed by the post filter chemical treatment. Sodium hypochlorite is
added prior to filtration for disinfection. After filtration additional sodium hypochlorite is added to maintain
disinfection and sodium hydroxide, fluoride, and zinc orthophosphate are added to complete the treatment
process.
Description of the wastewater and the treatment process(es) for wastewater generated by the R.A.
Thomas WTP:
The R.A. Thomas WTP utilizes the following equipment:
• One (1) poly-blend unit for wash water polymer(not currently in use)
• Two (2) metering pumps for sodium bisulfite feed
• Two (2) tanks [400-gallon for sodium bisulfite]
• One (1) equalization basin [0.55 MG for wash water retention]
• Four(4) EQ wash water pumps [1.12 MGD each for pumping wash water to clarifier]
• One (1) wash water clarifier[0.40 MG for wash water treatment]
• Three (3) residual station waste pumps [0.20 MGD each for pumping basin residuals
to residual lagoons for drying]
• Two (2) residuals lagoons [1.76 MG's each]
• One (1) flume flow meter[final discharge]
Heavy solids from the plant's sedimentation basins are sent directly to the residual pumping
station that has three residuals pumps. The residuals pumps pump the heavy solids to one of
the two residuals lagoons. One lagoon is kept in service while the other is out of service
being dried. Wash water from our filter backwashes is sent to an equalization basin. From the
equalization basin the wash water is then pumped to the clarifier. When in use, wash water
polymer is injected into the line between the wash water equalization basin and the clarifier to
facilitate settling of the solids (this system is currently not being used and will likely remain
out of service). Residuals from the clarifier are sent to the residual pumps station and then
pumped to the residual lagoon in service. The primary method of drying of solids is settling.
Sodium bisulfite is added at the discharge of the equalization basin for dechlorination of our
effluent. See attached schematic for additional information.

EPA Identification Number NPDES Permit Number Facility Name Form Approved 03/05/19
N/A NC0079821 R.A.Thomas WTP OMB No.2040-0004
Form U.S.Environmental Protection Agency
2C "EPA Application for NPDES Permit to Discharge Wastewater
NPDES EXISTING MANUFACTURING,COMMERCIAL, MINING,AND SILVICULTURE OPERATIONS
SECTION 1.OUTFALL LOCATION(40 CFR 122.21(g)(1))
1.1 Provide information on each of the facility's outfalls in the table below.
o Outfall Receiving Water Name Latitude Longitude
Number
001 Unnamed tributary to Sal 36° 5' 13.1 e i' N -80° 13' 5.40d W
cci
O
SECTION 2.LINE DRAWING(40 CFR 122.21(g)(2))
a, 2.1 Have you attached a line drawing to this application that shows the water flow through your facility with a water
c .3 balance?(See instructions for drawing requirements.See Exhibit 2C-1 at end of instructions for example.)
J co
o ❑✓ Yes ❑ No
SECTION 3.AVERAGE FLOWS AND TREATMENT(40 CFR 122.21(g)(3))
3.1 For each outfall identified under Item 1.1, provide average flow and treatment information.Add additional sheets if
necessary.
**Outfall Number** 001
Operations Contributing to Flow
Operation Average Flow
(4)Coagulation 0.0 mgd
(5)Flocculation 0.o mgd
is
(6)Sedimentation 0.0 mgd
co
f° (7)Filtration 0.236 mgd
LL Treatment Units
Description Code from Final Disposal of Solid or
(include size,flow rate through each treatment unit, Table 2C-1 Liquid Wastes Other Than
retention time,etc.) by Discharge
(4)Coagulation(see attached Design Memo) 2-D Landfill
(5)Flocculation(see attached Design Memo) 1-G Landfill
(6)Sedimentation(see attached Design Memo) 1-U Landfill
(7)Filtration(see attached Design Memo) 1-Q Landfill
EPA Form 3510-2C(Revised 3-19) Page 1

EPA Identification Number NPDES Permit Number Facility Name Form Approved 03/05/19
N/A NC0079821 R.A.Thomas WTP OMB No.2040-0004
3.1 **Outfall Number** 001
cont. Operations Contributing to Flow
Operation Average Flow
(7-11)Post Filter Operations 6.62 mgd
(7,12-16)Washwater EQ Basin 0.255 mgd
mgd
mgd
Treatment Units
Description Code from Final Disposal of Solid or
(include size,flow rate through each treatment unit, Table 2C-1 Liquid Wastes Other Than
retention time,etc.) by Discharge
0 Disinfection(see attached Design Memo) 2-F N/A
Dechlorination(see attached Design Memo) 2-E Landfill
0
U
c
E
d
H
**Outfall Number**
co
Operations Contributing to Flow
Operation Average Flow
mgd
a' mgd
mgd
mgd
Treatment Units
Description Code from Final Disposal of Solid or
(include size,flow rate through each treatment unit, Table 2C-1 Liquid Wastes Other Than
retention time,etc.) by Discharge
3.2 Are you applying for an NPDES permit to operate a privately owned treatment works?
E� w� ❑ Yes ❑✓ No 4 SKIP to Section 4.
un= 3.3 Have you attached a list that identifies each user of the treatment works?
❑ Yes ❑ No
EPA Form 3510-2C(Revised 3-19) Page 2

EPA Identification Number NPDES Permit Number Facility Name Form Approved 03/05/19
N/A NC0079821 R.A.Thomas WTP OMB No.2040-0004
SECTION 4.INTERMITTENT FLOWS(40 CFR 122.21(g)(4))
4.1 Except for storm runoff,leaks,or spills,are any discharges described in Sections 1 and 3 intermittent or seasonal?
❑ Yes ❑✓ No 4 SKIP to Section 5.
4.2 Provide information on intermittent or seasonal flows for each applicable outfall.Attach additional pages,if necessary.
Outfall Operation Frequency Flow Rate
Number (list) Average Average Long-Term Maximum Duration
Days/Week Months/Year Average Daily
days/week months/year mgd mgd days
days/week months/year mgd mgd days
LL
days/week months/year mgd mgd days
days/week months/year mgd mgd days
a)
days/week months/year mgd mgd days
days/week months/year mgd mgd days
days/week months/year mgd mgd days
days/week months/year mgd mgd days
days/week months/year mgd mgd days
SECTION 5.PRODUCTION(40 CFR 122.21(g)(5))
5.1 Do any effluent limitation guidelines(ELGs)promulgated by EPA under Section 304 of the CWA apply to your facility?
❑ Yes ❑✓ No 4 SKIP to Section 6.
5.2 Provide the following information on applicable ELGs.
ELG Category ELG Subcategory Regulatory Citation
a
a
5.3 Are any of the applicable ELGs expressed in terms of production(or other measure of operation)?
0 Yes ❑✓ No 4 SKIP to Section 6.
O
.4 Provide an actual measure of dailyproduction expressed in terms and units of applicable P ELGs.
Outfall Unit of
c Number Operation,Product,or Material Quantity per Day Measure
O
'a
O
a.
EPA Form 3510-2C(Revised 3-19) Page 3

EPA Identification Number NPDES Permit Number Facility Name Form Approved 03/05/19
N/A NC0079821 R.A.Thomas WTP OMB No.2040-0004
SECTION 6.IMPROVEMENTS(40 CFR 122.21(g)(6))
6.1 Are you presently required by any federal,state,or local authority to meet an implementation schedule for constructing,
upgrading,or operating wastewater treatment equipment or practices or any other environmental programs that could
affect the discharges described in this application?
❑ Yes ❑✓ No 4 SKIP to Item 6.3.
6.2 Briefly identify each applicable project in the table below.
to
Affected Final Compliance Dates
Brief Identification and Description of Outfalls Source(s)of
Project (list outfall Discharge Required Projected
number)
a
-a
a)
Q
6.3 Have you attached sheets describing any additional water pollution control programs(or other environmental projects
that may affect your discharges)that you now have underway or planned?(optional item)
❑ Yes ❑ No ✓❑ Not applicable
SECTION 7.EFFLUENT AND INTAKE CHARACTERISTICS(40 CFR 122.21(g)(7))
See the instructions to determine the pollutants and parameters you are required to monitor and,in turn,the tables you must
complete. Not all applicants need to complete each table.
Table A.Conventional and Non-Conventional Pollutants
7.1 Are you requesting a waiver from your NPDES permitting authority for one or more of the Table A pollutants for any of
your outfalls?
❑✓ Yes ❑ No 4 SKIP to Item 7.3.
7.2 If yes,indicate the applicable outfalls below.Attach waiver request and other required information to the application.
Outfall Number 001 Outfall Number Outfall Number
7.3 Have you completed monitoring for all Table A pollutants at each of your outfalls for which a waiver has not been
requested and attached the results to this application package?
cu
El Yes ❑✓ No;a waiver has been requested from my NPDES
permitting authority for all pollutants at all outfalls.
Table B.Toxic Metals,Cyanide,Total Phenols,and Organic Toxic Pollutants
- 7.4 Do any of the facility's processes that contribute wastewater fall into one or more of the primary industry categories
listed in Exhibit 2C-3?(See end of instructions for exhibit.)
a El Yes ❑✓ No 4 SKIP to Item 7.8.
a) 7.5 Have you checked"Testing Required"for all toxic metals,cyanide,and total phenols in Section 1 of Table B?
w ❑ Yes ❑✓ No
7.6 List the applicable primary industry categories and check the boxes indicating the required GC/MS fraction(s)identified
in Exhibit 2C-3.
Primary Industry Category Required GC/MS Fraction(s)
(Check applicable boxes.)
❑Volatile 0 Acid 0 Base/Neutral 0 Pesticide
❑Volatile 0 Acid 0 Base/Neutral 0 Pesticide
0 Volatile 0 Acid 0 Base/Neutral 0 Pesticide
EPA Form 3510-2C(Revised 3-19) Page 4

EPA Identification Number NPDES Permit Number Facility Name Form Approved 03/05/19
N/A NC0079821 R.A.Thomas WTP OMB No.2040-0004
7.7 Have you checked"Testing Required"for all required pollutants in Sections 2 through 5 of Table B for each of the
GC/MS fractions checked in Item 7.6?
❑ Yes ❑✓ No
7.8 Have you checked"Believed Present"or"Believed Absent"for all pollutants listed in Sections 1 through 5 of Table B
where testing is not required?
❑✓ Yes ❑ No
7.9 Have you provided(1)quantitative data for those Section 1,Table B,pollutants for which you have indicated testing is
required or(2)quantitative data or other required information for those Section 1,Table B,pollutants that you have
indicated are"Believed Present"in your discharge?
❑✓ Yes ❑ No
7.10 Does the applicant qualify for a small business exemption under the criteria specified in the instructions?
❑ Yes 4 Note that you qualify at the top of Table B, ❑ No
0 then SKIP to Item 7.12.
c 7.11 Have you provided(1)quantitative data for those Sections 2 through 5,Table B,pollutants for which you have
determined testing is required or(2)quantitative data or an explanation for those Sections 2 through 5,Table B,
pollutants you have indicated are"Believed Present"in your discharge?
w
✓❑ Yes ❑ No
}; Table C.Certain Conventional and Non-Conventional Pollutants
7.12 Have you indicated whether pollutants are"Believed Present"or"Believed Absent"for all pollutants listed on Table C
for all outfalls?
✓❑ Yes ❑ No
0 7.13 Have you completed Table C by providing(1)quantitative data for those pollutants that are limited either directly or
indirectly in an ELG and/or(2)quantitative data or an explanation for those pollutants for which you have indicated
"Believed Present"?
0 Yes ❑✓ No
w Table D.Certain Hazardous Substances and Asbestos
7.14 Have you indicated whether pollutants are"Believed Present"or"Believed Absent"for all pollutants listed in Table D for
all outfalls?
✓❑ Yes ❑ No
7.15 Have you completed Table D by(1)describing the reasons the applicable pollutants are expected to be discharged
and(2)by providing quantitative data,if available?
❑✓ Yes ❑ No
Table E.2,3,7,8-Tetrachlorodibenzo-p-Dioxin(2,3,7,8-TCDD)
7.16 Does the facility use or manufacture one or more of the 2,3,7,8-TCDD congeners listed in the instructions,or do you
know or have reason to believe that TCDD is or may be present in the effluent?
❑ Yes 4 Complete Table E. ❑✓ No 4 SKIP to Section 8.
7.17 Have you completed Table E by reporting qualitative data for TCDD?
❑ Yes ❑ No
SECTION 8.USED OR MANUFACTURED TOXICS(40 CFR 122.21(g)(9))
8.1 Is any pollutant listed in Table B a substance or a component of a substance used or manufactured at your facility as
an intermediate or final product or byproduct?
❑✓ Yes ❑ No 4 SKIP to Section 9.
u, 8.2 List the pollutants below.
Fo 1. Zinc(from zinc orthophosphate) 4. 7.
0
0 2. 5. 8.
N
3. 6. 9.
EPA Form 3510-2C(Revised 3-19) Page 5

EPA Identification Number NPDES Permit Number Facility Name Form Approved 03/05/19
N/A NC0079821 R.A.Thomas WTP OMB No.2040-0004
SECTION 9.BIOLOGICAL TOXICITY TESTS(40 CFR 122.21(g)(11))
9.1 Do you have any knowledge or reason to believe that any biological test for acute or chronic toxicity has been made
within the last three years on(1)any of your discharges or(2)on a receiving water in relation to your discharge?
�, ❑✓ Yes ❑ No 4 SKIP to Section 10.
9.2 Identify the tests and theiraurposes below.
Test(s) Purpose of Test(s) Submitted to NPDES Date Submitted
o Permitting Authority?
Chronic Wet Testing Required monitoring ✓❑ Yes ❑ No 08/03/2021
U_
'm ❑ Yes ❑ No
❑ Yes ❑ No
SECTION 10.CONTRACT ANALYSES(40 CFR 122.21(g)(12))
10.1 Were any of the analyses reported in Section 7 performed by a contract laboratory or consulting firm?
❑✓ Yes ❑ No 4 SKIP to Section 11.
10.2 Provide information for each contract laboratory or consulting firm below.
Laboratory Number 1 Laboratory Number 2 Laboratory Number 3
Name of laboratory/firm Environment One(Lab#581) Meritech Inc.(Lab#027) R.A.Thomas WTP
Laboratory(Lab#5128)
Laboratory address 114 Oakmont Drive 642 Tamco Road 1201 S.Martin Luther King,
Greenville,NC 27858 Reidsville,NC 27320 Jr.Drive
Winston-Salem,NC 27107
0 Phone number
[phone] [phone] [phone]
Pollutant(s)analyzed
Total suspended residue, Quarterly Chronic WET Testing pH and total residual
turbidity,ammonia,TKN, chlorine
NO2/NO3 as N,total
phosphorus,fluoride,total
hardness,aluminum,copper,
zinc,total nitrogen
SECTION 11.ADDITIONAL INFORMATION(40 CFR 122.21(g)(13))
11.1 Has the NPDES permitting authority requested additional information?
o ❑✓ Yes ElNo 4 SKIP to Section 12.
11.2 List the information requested and attach it to this application.
`0
c 1 Total Hardness(see attached permit renewal letter) 4
0
2. 5.
3. 6.
EPA Form 3510-2C(Revised 3-19) Page 6

EPA Identification Number NPDES Permit Number Facility Name Form Approved 03/05/19
N/A NC0079821 R.A.Thomas WTP OMB No.2040-0004
SECTION 12.CHECKLIST AND CERTIFICATION STATEMENT(40 CFR 122.22(a)and(d))
12.1 In Column 1 below,mark the sections of Form 2C that you have completed and are submitting with your application.
For each section,specify in Column 2 any attachments that you are enclosing to alert the permitting authority.Note
that not all applicants are required to complete all sections or provide attachments.
Column 1 Column 2
❑✓ Section 1:Outfall Location ❑ w/attachments
❑✓ Section 2:Line Drawing ✓❑ w/line drawing ❑ w/additional attachments
im Section 3:Average Flows and w/list of each user of
Treatment 0wl attachments El privately owned treatment
works
❑✓ Section 4: Intermittent Flows ❑ w/attachments
❑✓ Section 5: Production ❑ w/attachments
w/optional additional
❑✓ Section 6: Improvements ❑ w/attachments ❑ sheets describing any
additional pollution control
plans
❑✓ w/request for a waiver and ❑ w/explanation for identical
supporting information outfalls
w
❑
w/small business exemption request El w/other attachments
CU
co ❑✓ Section 7: Effluent and Intake 0w/Table A 0
c
Characteristics w/Table B
0
.0 0w/Table C El w/Table D
0 w/Table E ❑ w/analytical results as an
0 attachment
c ✓❑ Section 8:Used or Manufactured ❑ wl attachments
in Toxics
❑ Section 9: Biological Toxicity Elw/attachments
Tests
U
❑✓ Section 10:Contract Analyses ❑ wl attachments
❑✓ Section 11:Additional Information ❑✓ w/attachments
❑✓ Section 12:Checklist and ❑✓ w/attachments
Certification Statement
12.2 Certification Statement
I certify under penalty of law that this document and all attachments were prepared under my direction or supervision in
accordance with a system designed to assure that qualified personnel properly gather and evaluate the information
submitted. Based on my inquiry of the person or persons who manage the system,or those persons directly
responsible for gathering the information,the information submitted is,to the best of my knowledge and belief,true,
accurate,and complete. I am aware that there are significant penalties for submitting false information,including the
possibility of fine and imprisonment for knowing violations.
Name(print or type first and last name) Official title
Courtney L.Driver Utilities Director
ig ature • Date signed
19.114(
1 OA - 00-21
EPA Form 3510-2C(Revised 3-19) Page 7

This page intentionally left blank.

Section 2: Line Drawing
R.A. Thomas WTP Line Drawing with
Water Balance Table

R.A. Thomas Water Treatment Plant
Water System Facility ID = TP1
Production Capacity = 18.0 MGD
City of Winston-Salem
NPDES ID# = NC0079821
Potassium
Permanganate Design Flow=10.0 MGD Design Flow=12.0 MGD
6.—)Salem Lake—1.0 Billior I i (3)Common Header i ( (2)Yadin River via Neilson
►
Gallon Raw Water Reservoirs \WTP Raw Water Reservio7
// Alum ► \\
Caustic ►4 Design Flow=18.0 MGD
Chlorine ► (15)Two 1.76 MG Residuals
Lagoons
Water Balance Table ♦ Land Application Permit
U WQ0031314
Raw Water (4)Coagulation Avg.Sludge Production
(1-3)Avg.Flow=6.77 MGD =150 Dry Tons/Year
Plant Pre-Filter Processes V A
(4-6)Avg.Flow=6.47 MGD
(5) Flocculation
Plant Filtered Flow (14) Residuals Pump
(7)Avg.Flow=6.62 MGD Station
•
Plant Pumped Flow to POE Three 200 GPM Pumps
(8-11)Avg.Flow=6.66 MGD (6)Sedimentation Residuals t
Basins
Backwash&Filter-To-Waste _
(12)Avg.Flow=0.255 MGD
Chlorine 0-
Residuals System • Bisulfite
(12-16)Avg.Flow=0.236 MGD is Polymer Backwash and
discharged through Outfall 001. (7) Filtration Filter to Waste
Design Flow=4.5 (12)
Approx.150 DT's of residuals are ♦ MGD Washwater vi
produced each year that are EQ Basin z
73
hauled to Hanes Mill Road Landfill Chlorine ►
0.55 MG a,
Fluoride Design Flow=18.0 MGD cc
Zinc OrthoPhosphate ►
Caustic ►
• (4)-1.12 MGD Pumps ►
Design Flow=4.5 MGD
(8) 1.5 MG I.
Clearwell
(-- (13)
Washwater
• Clarifier
(9) 1.5 MG
Clearwell Avg Flow=0.236 MGD-*
♦ (16) NPDES NC0079821
Discharge Outfall 001
(10) Finished
Water Pump t Design Flow=24.0 MGD
Station
Entry Point-EP1 ►
V
(1) Distribution
System i

Section 3: Average Flows and Treatment
R.A. Thomas WTP Design
Memorandum

BLACK&VEATCH INTERNATIONAL COMPANY
CIVIL DESIGN MEMORANDUM
Winston-Salem/Forsyth County Utility Commission B&V Project 145730
Winston-Salem,North Carolina First Issue: December 15, 2006
R.A. Thomas Water Treatment Plant Improvements Latest Revision: July 17,2007
A. GENERAL
The existing 24 mgd water treatment plant including the North and South treatment
trains, filter building,chemical building, finished water pumping station, clearwells and
other related miscellaneous structures will be demolished and replaced with a new water
treatment facility. The new treatment facility will have a design treatment capacity of 18
mgd with no plans for future capacity expansion onsite and an ultimate hydraulic capacity
of 150%of the design treatment capacity. The water treatment plant will be designed for
rapid mix, flocculation, sedimentation, filtration, and disinfection of the water from the
Yadkin River and/or Salem Lake prior to delivery to the distribution system.
The new plant will be located on the existing R.A. Thomas water treatment plant site,
1201 South Martin Luther King Jr. Boulevard, Winston-Salem,North Carolina 27103.
The plant will be equipped with two 9.0 mgd trains, each consisting of one rapid mix,
flocculation and sedimentation basins and two filters. The filtered water will be stored in
two 1.5 mg reservoirs on the plant site. Finished water will be pumped to the distribution
system with onsite connections to the existing distribution system mains.
The plant will be designed for operating at minimum flows of 6.0 mgd during low
demand periods. The design minimum flows through a single train will be 3.0 mgd. The
average plant flow is 10 mgd. The maximum hydraulic capacity of each basin train will
be 200 percent of design capacity. The maximum hydraulic capacity of the remaining
facilities will be 150 percent of design capacity. Provisions will be made to remove a 9.0
mgd train from service while operating the other train.
A process flow schematic(Figure I-1) for the raw water storage and treatment facilities, a
process flow schematic (Figure I-2) for the finished water,wash water, and residuals
handling facilities, a hydraulic profile(Figure I-3)for the treatment facilities, a hydraulic
profile(Figure I-4) for the wash water facilities, and a general site layout(Figure I-5) are
attached.
The plant will be designed to accommodate potential treatment facilities if future
conditions dictate. Potential facilities include ozone feed facilities following the
sedimentation basins and ultraviolet disinfection following filtration. Chlorine dioxide
storage and feed facilities will be considered in the future as an alternative to ozone.
1. Geotechnical Data. Preliminary geotechnical investigations are tentatively
scheduled for April 2007.
I-1

BLACK&VEATCH INTERNATIONAL COMPANY
CIVIL DESIGN MEMORANDUM
Winston-Salem/Forsyth County Utility Commission B&V Project 145730
Winston-Salem,North Carolina First Issue: December 15, 2006
R.A. Thomas Water Treatment Plant Improvements Latest Revision: July 17,2007
2. Flood Zones. Base flood elevations and flood hazard factors have been
determined for this site. The National Flood Insurance Program has
approximated the 100-year flood zones (Flood Zone AE) at the site. The
northern areas of the site along Salem Creek have been designated as Flood
Zone AE.
The 100-year flood elevation at the site is 768.00 feet.
B. CONSTRUCTION SEQUENCE
Future water demand projections and hydraulic modeling of the water distribution system
were conducted by Hazen and Sawyer in May 2007. The results of the hydraulic
modeling and demand projections confirmed that there is sufficient capacity in the
remaining water treatment and storage facilities owned by the Winston-Salem/Forsyth
County Utility Commission to reliably meet the future demands in the distribution system
with the Thomas WTP offline throughout the construction duration of the new treatment
facility. Therefore,the existing water treatment plant will be taken offline and will be
demolished in its entirety in order to build the new treatment facilities. No phased
construction sequencing will be required.
C. RAW WATER QUALITY
The R.A. Thomas WTP has the ability to receive and treat raw water from the Yadkin
River and/or Salem Lake.
The following table indicates the range of values for raw water quality parameters from
both raw water sources.
I-2

BLACK&VEATCH INTERNATIONAL COMPANY
CIVIL DESIGN MEMORANDUM
Winston-Salem/Forsyth County Utility Commission B&V Project 145730
Winston-Salem,North Carolina First Issue: December 15, 2006
R.A. Thomas Water Treatment Plant Improvements Latest Revision: July 17,2007
Summary of Raw Water Quality Data
(January 2001 —October 2006)
Yadkin River Salem Lake
Constituents Minimum Maximum Minimum Maximum
Turbidity,NTU 1.7 546.5 1.2 154.6
pH, units 5.6 7.8 6.2 7.4
Temperature, °C 4.8 31.0 6.4 29.4
Alkalinity, mg/L as CaCO3 13.0 38.0 13.0 45.0
Total Iron, mg/L 0.13 5.82 0.03 2.64
Total Manganese, mg/L 0.011 1.060 0.008 0.393
Hardness, mg/L 10 44 12 38
D. RAW WATER STORAGE RESERVOIRS
Raw water storage will remain unchanged. Existing raw water storage for the plant
consists of two 15 mg reservoirs located at the R.W.Neilson WTP. These reservoirs
serve as shared raw water storage from the Yadkin River for both the R.W.Neilson WTP
and the R.A. Thomas WTP. No offsite raw water storage exists for the Salem Lake raw
water source. Raw water from the raw water reservoirs at the R.W.Neilson WTP and
Salem Lake flows by gravity to the basin and filter complex. Existing booster pumps at
the R.W.Neilson WTP can be utilized for additional raw water supply capacity. Gravity
and pumped flow rates will be controlled by new rate control valves located in a new raw
water rate control structure on the plant site.
1. Raw Water Supply Flowmeters.
A flowmeter will be provided on each of the Salem Lake and Yadkin River
raw water pipelines to measure raw water flow and provide for control of
raw water flow rate from each raw water source.
Raw Water Source
Salem Lake Yadkin River
Type Magnetic Magnetic
Number of Units 1 1
Size, inches 30 20
I-3

BLACK& VEATCH INTERNATIONAL COMPANY
CIVIL DESIGN MEMORANDUM
Winston-Salem/Forsyth County Utility Commission B&V Project 145730
Winston-Salem,North Carolina First Issue: December 15, 2006
R.A. Thomas Water Treatment Plant Improvements Latest Revision: July 17,2007
Flow Measurement Range, each mgd 3.0— 16.21 3.0— 16.41'2
'Maximum flow rates calculated using a Hazen-Williams C-value of 100. Actual maximum
flow rates may be higher depending on the condition and age of the existing raw water
transmission pipelines.
2Both booster pumps operating.
Control: The signal from each flowmeter will be used by the rate control
valves for control of flow from each raw water source and
transmitted to the Y
plant control system for indication and
totalization.
A nozzle will be provided on each raw water pipeline to allow an insert
probe magnetic flowmeter to be installed as backup to the raw water
flowmeters.
2. Raw Water Supply Rate Control Valves. Rate control valves on the Yadkin
River and Salem Lake raw water pipelines will be provided to control flow
rate.
Raw Water Source
Salem Lake Yadkin River
Type Butterfly Butterfly
Number of Units 2 2
Size, inches 30 20
Actuator type Electric Electric
Control: Each valve will be capable of local manual control. When both
sources valve selector switches are in the REMOTE position,
both valves will be automatically modulated to match a supply
source flow rate set point(one for the Yadkin River and one for
Salem Lake)entered at the PCS workstation computers. When
the valves are in COMPUTER MANUAL at the PCS
workstation computers, the valves will maintain a manual valve
position setpoint
E. BASIN AND FILTER COMPLEX
The existing north and south treatment trains will be demolished and replaced with a new
basin and filter complex. The new basin and filter complex will consist of two 9-mgd
treatment trains. The layout of the foundation, pipe gallery floor,and filter gallery floor
I-4

BLACK&VEATCH INTERNATIONAL COMPANY
CIVIL DESIGN MEMORANDUM
Winston-Salem/Forsyth County Utility Commission B&V Project 145730
Winston-Salem,North Carolina First Issue: December 15, 2006
R.A. Thomas Water Treatment Plant Improvements Latest Revision: July 17,2007
levels of the basin and filter complex are shown on Figures I-7 through I-12. Sections
through the complex are shown on Figure I-13.
1. Plant Influent Flowmeters. A flowmeter will be provided in the influent line
to each treatment train to measure raw water flow and provide for control of
raw water flow rate to each of the treatment trains.
Type Magnetic
Number of Units 2
Size, inches 20
Flow Measurement Range, each mgd 3— 18
Control: The signal from each flowmeter will be used by the rate control
valve for control of flow to each train and transmitted to the
plant control system for indication and totalization.
A nozzle will be provided on each treatment train influent line to allow an
insert probe magnetic flowmeter to be installed as backup to the plant
influent flowmeters.
2. Plant t Influent Rate Control Valves. A rate control valve will be provided in
the influent line to each treatment train to control the flow rate.
Type Butterfly
Number of Units 2
Size, inches 20
Actuator type Electric
Control: Each valve will be capable of local manual control. When a
train's valve selector switch is in the REMOTE position, each
valve will be automatically modulated to match an operator
entered percentage (0-100%)of the total of the supply source
flow rate setpoints. When the valves are in COMPUTER
MANUAL at the PCS workstation computers, the valves will
maintain a manual valve position setpoint.
1-5

BLACK&VEATCH COMPANY
INTERNATIONAL Y
O CO N
CIVIL DESIGN MEMORANDUM
Winston-Salem/Forsyth County Utility Commission B&V Project 145730
Winston-Salem,North Carolina First Issue: December 15, 2006
R.A. Thomas Water Treatment Plant Improvements Latest Revision: July 17,2007
3. Rapid Mix Basins. One two-stage rapid mix basin will be provided in each
treatment train.
Number of trains 2
Number of basins, each train 1
Number of chambers in series, each basin 2
Size of each chamber
Width, ft 6
Length, ft 6
Total depth, ft 12.00
Design sidewater depth, ft 9.00
Detention time of each cell, sec 23.30
Minimum G value @ 40° F, sec-1 750
Motor speed, rpm 1,200
Speed adjustment Change gears or sheaves
Min motor nameplate horsepower,
each, hp 15
Mixer type Vertical turbine
Impeller type Radial-flow turbine
Control: Provisions will be made to start/stop the rapid mixers locally.
Status and alarm conditions will be indicated locally and
transmitted to the plant control system.
4. Flocculation Basins. One flocculation basin will be provided in each
treatment train. Each flocculation basin will be square shaped with baffles
dividing it into nine cells. Chemically treated water entering the flocculation
basin will be distributed equally across the basin width through the
flocculation basin influent flume. Each cell will be equipped with an
adjustable speed vertical flocculator.
Number of trains 2
Number of basins, each train 1
Capacity, each, mgd 9.0
Basin size
Width, ft 46.00
Length, ft 46.00
I-6

BLACK&VEATCH INTERNATIONAL COMPANY
CIVIL DESIGN MEMORANDUM
Winston-Salem/Forsyth County Utility Commission B&V Project 145730
Winston-Salem,North Carolina First Issue: December 15,2006
R.A. Thomas Water Treatment Plant Improvements Latest Revision: July 17,2007
Average sidewall depth, ft 15.00
Average sidewater depth, ft 12.00
Inlet flow distribution Slotted influent flume
Mixing zones, each basin 3
Number of cells, each mixing zone 3
Cell dimensions, feet 15.33 x 15.33
Detention times
per mixing zone, min 10.13
per basin, min 30.39
Flocculator type Vertical shaft axial flow impeller
Speed adjustment Adjustable frequency drive
Velocity gradient("G"), sec 1,
each mixing zone 10-90
Number of flocculators,
each mixing zone 3
Min motor nameplate horsepower,
each, hp 2.0
Control: Flocculators will be provided with variable speed controls.
Three variable speed controllers will be provided for each basin
with each controlling three flocculators of a mixing zone.
Provisions will be made to start/stop the flocculators and control
speed locally. Status and alarm conditions will be indicated
locally and transmitted to the plant control system.
5. Sedimentation Basins. One sedimentation basin will be provided in each
treatment train. Flocculated water entering the sedimentation basin will be
distributed equally across the basin width through the sedimentation basin
influent flume. Settled water will flow out of the basin through effluent
launders with submerged orifices.
Number of trains 2
Number of basins, each train 1
Capacity, each, mgd 9.0
Basin size
Width, ft 62.00
Length, ft 209.0
Average sidewall depth, ft 19.0
I-7

BLACK&VEATCH INTERNATIONAL COMPANY
CIVIL DESIGN MEMORANDUM
Winston-Salem/Forsyth County Utility Commission B&V Project 145730
Winston-Salem,North Carolina First Issue: December 15, 2006
R.A. Thomas Water Treatment Plant Improvements Latest Revision: July 17,2007
Average sidewater depth, ft 16.0*
Floor slope,percent 1.96
Inlet flow distribution Influent flume with slotted baffle
wall
Detention time, hrs 4.0
Hydraulic loading rate, gpm/sf 0.5
Flow-through velocity, fpm 0.84
Residuals collection equipment Chain and flight
Longitudinal collectors
Number of collectors, each basin 4
Flight speed, fpm I
Motor brake horsepower, bhp 0.5
End collectors
Number of collectors, each basin I
Flight speed, fpm 2
Motor brake horsepower, bhp 0.5
Effluent launders
Type Submerged orifice
Number per basin 6
Weir loading rate, gpd/ft 19,737
Size, each
Width, in 20
Length, ft 38
Depth, in 36
*Basin sidewater depth will accommodate the future addition of tube settlers
if increase in basin capacity is desired.
Control: Provisions will be made to automatically(time-based) and
manually stop/start the residuals collectors locally. Status and
alarm conditions will be indicated locally and transmitted to the
plant control system.
I-8

BLACK&VEATCH INTERNATIONAL COMPANY
CIVIL DESIGN MEMORANDUM
Winston-Salem/Forsyth County Utility Commission B&V Project 145730
Winston-Salem,North Carolina First Issue: December 15, 2006
R.A. Thomas Water Treatment Plant Improvements Latest Revision: July 17,2007
6. Basin Drainage Systems.
Each basin train will be provided with three drains to allow for complete
dewatering of the entire train. The clear water drain will allow for drainage
of the sedimentation and flocculation basins to a fixed level in the
sedimentation basin. Drained water from the clear water drain will be sent to
the wash water equalization basin and to the wash water clarifier for
treatment prior to discharge to the creek. A second clear water drain will be
provided to drain the contents of the rapid mix chambers. Clear water
drainage from the rapid mix chambers will also be routed to the wash water
equalization basin. The third basin drainage system provided will drain the
remaining contents of the sedimentation basin to include the sedimentation
basin residuals collection trough and sump and discharge to the residuals
pumping station. Piping and valving will be provided to direct residuals
blowdown through a residuals viewing pit during operation of the
sedimentation basins.
Number of drains, each train 3
Dewatering design flow, max, mgd 4.5
Time to drain basin, hrs 18.6
7. Filter Influent Flumes. The filter influent flumes will convey the water from
the sedimentation basins to the filters. The filter influent flumes for each
train will be separated by slide gates to allow operation of each train
separately. Under normal operation,the gate separating the filter influent
flumes will remain opened to reduce impact of taking a filter offline for
washing. Additional gates will be provided such that the flumes may be
isolated without having to take a train offline.
Drains will be provided in each flume for dewatering. Flume drainage will
be sent to the wash water equalization basin and to the wash water clarifier
prior to discharge to the creek.
A bubbler tube in the filter influent flume for each train will provide level
measurement for filter influent flume level control and high level alarm when
the individual trains are isolated for independent operation. One of the
bubblers will be selected for control when the trains are operated together.
I-9

BLACK& VEATCH INTERNATIONAL COMPANY
CIVIL DESIGN MEMORANDUM
Winston-Salem/Forsyth County Utility Commission B&V Project 145730
Winston-Salem,North Carolina First Issue: December 15, 2006
R.A. Thomas Water Treatment Plant Improvements Latest Revision: July 17,2007
Flume level will be indicated locally and transmitted to the plant control
system.
8. Basin Overflows. Basin overflows will be provided at overflow weirs in
each train's basin influent flume, flocculation basin influent flume, and filter
influent flume. Overflow water from each flume will discharge into a
common chamber which will discharge to the wash water equalization basin
via the wash water drain.
Level sensors at each overflow will activate an overflow alarm which will be
transmitted to the plant control system.
9. Filters. Four filters will be provided,two per treatment train.
Each filter will consist of two halves separated by a wash water gullet. Each
filter will be equipped for air/water backwash and will include fiberglass
wash water troughs and media. The filters will be located outdoors and
provided with removable handrails around the open area of each filter cell.
a. Filter Media.
Material Depth Gradation
Gravel
Top layer 2 inches 3/4"x 1/2"
2 inches 1/4"x 1/8"
2 inches 1/8" x 1/16"
2 inches 1/4" x 1/8"
2 inches 1/2"x 1/4"
Bottom layer 2 inches 3/4"x 1/2"
Anthracite 60 inches Effect. size,
1.45 to 1.55mm
b. Filters.
Number of filters 4
Cells per filter 2
Area per filter, ft2 799.0
Cell dimensions, feet 11.75 x 34.0
I-10

BLACK&VEATCH INTERNATIONAL COMPANY
CIVIL DESIGN MEMORANDUM
Winston-Salem/Forsyth County Utility Commission B&V Project 145730
Winston-Salem,North Carolina First Issue: December 15, 2006
R.A. Thomas Water Treatment Plant Improvements Latest Revision: July 17,2007
Total depth,ft 19.0
Filtration rate, gpm/ft2 3.91
Underdrain type Leopold Universal
Maximum wash water rate,
in/min(gpm/ft2) 36 (22.5)
Number of wash water troughs,
each cell 5
Air wash rate operating range,
scfm/ft2 3-4.3
Design backwash
duration, min 10
Design filter-to-waste
duration, min 20
c. Air Wash Blowers.
Type Multi-stage centrifugal
Number operating 1
Number standby 1
Capacity, each icfm 3,960
Discharge pressure,psig 5.7
Motor brake horsepower, each, bhp 250
Refer to Mechanical Design Memorandum for additional information on
air wash blowers.
d. Filter Controls and Instrumentation. Two filter workstations will be
provided. The operation of each filter will be controlled from the
appropriate filter workstation in the filter gallery. The control system
will provide for manual or automatic control of the backwashing
sequence at the local filter workstation. In automatic, following
initiation by the operator,the control system will automatically cycle the
selected filter through the backwash sequence. Elapsed time meters will
be provided on each filter console to show the duration of each phase of
the filter wash. Filter control valves will be electric actuated butterfly
valves. Refer to the Instrumentation and Control Section for additional
filter control details.
I-l l

BLACK&VEATCH INTERNATIONAL COMPANY
CIVIL DESIGN MEMORANDUM
Winston-Salem/Forsyth County Utility Commission B&V Project 145730
Winston-Salem,North Carolina First Issue: December 15, 2006
R.A. Thomas Water Treatment Plant Improvements Latest Revision: July 17,2007
10. Wash Water Supply. A wash water supply tank will be provided and will
store and feed wash water to the filters by gravity. The supply tank will be
filled by wash water supply pumps located in the finished water pumping
station. As a back-up to the wash water supply pumps, interconnect piping
will be provided to allow the supply tank to be filled directly from the
finished water distribution system.
a. Wash Water Supply Tank.
Number 1
Construction Prestressed concrete
Shape Circular
Capacity, each, gal 377,660 (359,900 usable)
Number of washes per tank 2
Diameter, ft 55
Sidewater depth, ft 21.25 (20.25 ft useable)
Control: A level sensor will be provided in the wash water supply tank.
Tank level will be transmitted to the plant control system. In
addition to continuous level indication,the sensor will be
utilized for automatic control of the wash water supply pumps
and for indicating tank overflow. Tank overflow alarm will be
transmitted to the plant control system.
b. Filter Backwash Flow Measurement.
Location Pipe gallery of Basin and
Filter Complex
Type Magnetic Flowmeter
Number of meters 1
Size, inches 36
Flow measurement range, mgd 5-26
Control: The filter backwash flow rate signal will be transmitted to the
plant control system for use in controlling the backwash flow
rate to each filter. Additional filter backwash details are located
in the I&C Section.
I-12

BLACK& VEATCH INTERNATIONAL COMPANY
CIVIL DESIGN MEMORANDUM
Winston-Salem/Forsyth County Utility Commission B&V Project 145730
Winston-Salem,North Carolina First Issue: December 15, 2006
R.A. Thomas Water Treatment Plant Improvements Latest Revision: July 17,2007
c. Wash Water Supply Pumps.
Location Finished Water Pumping Station
Type of pump Vertical turbine canned
Number of pumping units 1 + 1 standby
Capacity at rated head,
each, gpm 1,000
Rated head, ft 60
.Operating head range, ft 50-60
Number of washes per day 4
Motor brake horsepower,
each, bhp 40
Motor speed,rpm 1,800
Control: Wash water pumps will be operated automatically based on the
level in the wash water supply tank. Provisions will be made to
start/stop the pumps locally and from the plant control system.
Pump status and alarm conditions will be indicated locally and
transmitted to the plant control system.
d. Flow Measurement from Wash Water Supply Pumps.
Location Finished Water Pumping Station
Type Magnetic
Number of meters 1
Size, inches 8
Flow measurement range,mgd 1.0—3.0
Control: Flow signal will be transmitted to the plant control system and
local indication will be provided in the Finished Water Pumping
Station.
11. Potential Treatment Processes. Space will be provided on the site for ozone
treatment following the sedimentation basins and ultraviolet disinfection
following filtration. Provisions will be made for connecting the
sedimentation basin effluent and filter influent flumes with future ozone
basins. The design operating level in the filters will allow approximately 2
I-13

BLACK&VEATCH INTERNATIONAL COMPANY
CIVIL DESIGN MEMORANDUM
Winston-Salem/Forsyth County Utility Commission B&V Project 145730
Winston-Salem,North Carolina First Issue: December 15, 2006
R.A. Thomas Water Treatment Plant Improvements Latest Revision: July 17,2007
feet of headloss between the sedimentation basins and the filters for the
future installation of ozone.
F. FINISHED WATER STORAGE AND PUMPING
1. Finished Water Storage. The three existing clearwells will be demolished
and two new finished water storage reservoirs will be provided on the plant
site. Baffles will be provided in each reservoir to effectively use the
detention time in the tanks for disinfection contact time. The reservoirs will
be operated in series under normal operating conditions and reservoir bypass
piping will be provided to allow a reservoir to be taken out of service.
Under normal disinfection operating conditions, both reservoirs would be
maintained at least one-quarter full. Water level would fluctuate over the
upper three-quarters of the tanks to provide equalizing storage for operation
of the finished water pumps. With one reservoir out of service, the reservoir
must be maintained half full to meet disinfection requirements.
Number of reservoirs 2
Construction Prestressed concrete
Diameter, ft 160
Sidewater depth, ft 10
Capacity,each, mg 1.5
Disinfection parameters
Minimum Volume, mg 1.0
Flow, mgd 18
Temperature,°C 0.5
pH 7.0
Tlo/DT ratio 0.6
Control: Level sensors will be provided in each reservoir. Reservoir
level will be indicated in the finished water pumping station and
transmitted to the plant control system. A high level sensor will
be provided in each reservoir to indicate reservoir overflow.
Reservoir overflow alarms will be transmitted to the plant
control system. A low level cutoff switch will be provided to
stop the finished water and wash water supply pumps in the
event of a low reservoir level.
I-14

BLACK&VEATCH INTERNATIONAL COMPANY
CIVIL DESIGN MEMORANDUM
Winston-Salem/Forsyth County Utility Commission B&V Project 145730
Winston-Salem,North Carolina First Issue: December 15, 2006
R.A. Thomas Water Treatment Plant Improvements Latest Revision: July 17,2007
2. Finished Water Pumping. Figures I-14 and I-15 showing the operating floor
plan and section of the finished water pumping station are attached.
The p
will be constant speed vertical turbine canister. Pump selection
pumps
will be based upon the system curves developed by Pitometer as included in
the Predesign Report by HDR, Inc. dated August 2002.
The pumping station will be constructed with five pump bays. Five pumps
rated at 4, 4, 6, 6 and 6-mgd will be provided to achieve a pumping station
firm capacity of 20-mgd and a total capacity of 26-mgd. All motor starters
and pump cans will be sized based on a 6-mgd pump.
A magnetic flowmeter will be provided in the finished water discharge line
to measure water treatment plant effluent flow.
A traveling bridge crane with electrically operated bridge,trolley, and hoist
will be provided in the station for pump and equipment removal.
Pump type Vertical turbine, canned
Number of units 5
Unit designations FWP-301, -302, -303, -304, -305
Power supply 4160V, 3-phase
FWP-301, -302
Rated capacity, mgd 4
Rated head, ft 336
Max nominal pump operating
speed at rated head, rpm 1,800
Motor brake horsepower, bhp 350
FWP-303, -304, -305
Rated capacity, mgd 6
Rated head, ft 351
Max nominal pump operating
speed at rated head, rpm 1,200
Motor brake horsepower, bhp 600
1-15

BLACK&VEATCH INTERNATIONAL COMPANY
CIVIL DESIGN MEMORANDUM
Winston-Salem/Forsyth County Utility Commission B&V Project 145730
Winston-Salem,North Carolina First Issue: December 15, 2006
R.A. Thomas Water Treatment Plant Improvements Latest Revision: July 17,2007
Pump control valves
Type Ball valve
Actuators Hydraulic oil cylinder
Hydraulic oil system
Manufacturer STONKUS/PARCO
Type Duplex oil accumulator
Pressure tank capacity Sized to close five 12-inch
valves without need for power
with 25%reserve.
Packaged system containing all
starters, disconnects,
480/115V transformer, alarms,
HOA switch, etc.
Control: The pumps will be controlled manually from the plant control
system or locally at the finished water pumping station. A low
level sensor will be provided in each finished water storage
reservoir to stop the pumps on low water level. Pump status and
alarm conditions,pump discharge valve position, and finished
water storage reservoir levels will be indicated locally and
transmitted to the plant control system.
3. Flow Measurement.
Type Magnetic
Number of meters 1
Size, each, inches 24
Flow measurement range, mgd 4-26
Control: Flow signal will be transmitted to the plant control system and
local indication will be provided in the pumping station.
G. WASH WATER AND RESIDUALS HANDLING
1. Wash Water and Residuals Handling.
Currently, a common drainage system exists for sedimentation basin
overflow, for basin drainage and residuals drawdown, for filter backwash
and filter-to-waste drainage, and for storm water. These flow streams drain
I-16

BLACK&VEATCH INTERNATIONAL COMPANY
CIVIL DESIGN MEMORANDUM
Winston-Salem/Forsyth County Utility Commission B&V Project 145730
Winston-Salem,North Carolina First Issue: December 15, 2006
R.A. Thomas Water Treatment Plant Improvements Latest Revision: July 17,2007
to the wash water and residuals pumping station where they are pumped to
one of two residuals storage lagoons. This practice will be abandoned and
the clear water and residuals flow streams will be separated and treated.
Spent wash water and filter-to-waste will discharge by gravity to a new wash
water equalization basin. The collected water will be pumped from the
equalization basin to a new wash water clarifier. Wash water clarifier
effluent will discharge to the creek in accordance with the NPDES permit.
The wash water drainage system upstream of the equalization basin will be
designed to allow all four filters to be simultaneously wasted at the design
filtration rate prior to the addition of ozone, and three filters to be wasted at
the design filtration rate after the addition of ozone (filter hydraulic grade
line is reduced). This drainage capacity assumes a maximum headloss of 5
feet through a filter's media and underdrain during the wasting period. This
drainage capacity is provided for an emergency condition when water
quality dictates the basins be wasted until necessary treatment adjustments
are made. Because this is an emergency condition and not part of the normal
plant operation, flows in excess of the equalization basin pumping capacity
will overflow to the plant overflow drain.
Unthickened residuals from the sedimentation basins will discharge by
gravity through the viewing pit to the residuals pumping station. Residuals
from the wash water clarifier will also discharge by gravity to the residuals
pumping station. The combined residuals will be pumped to the residuals
storage lagoons. Decant/overflow from the residuals storage lagoons will
flow by gravity back to the wash water equalization basin.
2. Wash Water and Residuals Flows and Solids Production.
Filter Backwash Water Initial
Per filter'), gal 179,775
Avg(2),, gpd 359,550
Max(3), gpd 719,100
Filter-to-Waste
Per flter4), gal 63,920
Avg(2x4), gpd 127,840
I-17

BLACK&VEATCH INTERNATIONAL COMPANY
CIVIL DESIGN MEMORANDUM
Winston-Salem/Forsyth County Utility Commission B&V Project 145730
Winston-Salem,North Carolina First Issue: December 15, 2006
R.A. Thomas Water Treatment Plant Improvements Latest Revision: July 17, 2007
Max(3)(4), gpd 255,680
Total Residuals Production
Avg(5), lb/day 2,290
Max(6), lb/day 4,122
Unthickened Residuals
dua s Flow to Lagoons
(5)(7)
Avg , gpd 137,290
Max(6)(7), gpd 247,122
Thickened Residuals Production
Avg(5)(8), gpd 5,492
Max(6)(8), gpd 9,885
Free Liquid from Residuals(9)
Avg, gpd 131,798
Max, gpd 237,237
Clarifier Effluent
Avg(10), mgd 1.13
Max " ,( ) mgd 2.25
(1) Flow rate of 22.5 gpm/sf for 10 minutes.
(2) Half of the filters backwashed in one day.
(3) All filters backwashed in one day.
(4) Flow rate of 4 gpm/sf for 20 minutes.
(5) Two hundred twenty-nine pounds per million gallons, using average
flow rate of 10 mgd.
(6) Two hundred twenty-nine pounds per million gallons, using design flow
rate of 18 mgd.
(7) 0.2 percent solids.
(8) 5.0 percent solids.
(9) Unthickened residuals flow minus thickened residuals flow.
(10) Pumped flowrate from wash water equalization basin to wash water
clarifier under average daily conditions of two filter washes per day.
(11) Pumped flowrate from wash water equalization basin to wash water
clarifier under maximum daily conditions of four filter washes per day.
1-18

BLACK&VEATCH INTERNATIONAL COMPANY
CIVIL DESIGN MEMORANDUM
Winston-Salem/Forsyth County Utility Commission B&V Project 145730
Winston-Salem,North Carolina First Issue: December 15, 2006
R.A. Thomas Water Treatment Plant Improvements Latest Revision: July 17,2007
3. Wash Water Equalization Basin.
A wash water equalization basin will be provided for flow equalization of
wash water prior to treatment in the wash water clarifier. Depending on the
daily flow to the equalization basin, as few as one or up to four pumps will
be required to pump the contents of the basin to the wash water clarifier.
Under average daily conditions of two filter wash cycles per day, one pump
is required with three standby pumps available. Under maximum daily
conditions of four filter wash cycles per day,two pumps are required with
two standby pumps available. In the event of a sedimentation basin drain,
all four pumps are required with no standby pump available.
Submersible mixers will not be provided. Operations staff will be required
to wash down settled solids on an as needed basis.
Number of basins 1
Design criteria, each Storage volume of two filter
wash cycles plus 10 percent
Volume, each, gal 545,000
Basin type Reinforced concrete
Basin shape Circular
Dimensions, ft
Inside diameter, ft 75
Average sidewall water depth, ft 16.5
Average sidewall depth, ft 18.5
Bottom slope to sump 1:75
Water depth at top of sump, ft 17.0
Pumps
Number of pumps 4
Rated capacity, each, gpm 780
Rated head, ft 18
Operating head range, ft 12-33
Motor brake horsepower, bhp 10
I-19

BLACK&VEATCH INTERNATIONAL COMPANY
CIVIL DESIGN MEMORANDUM
Winston-Salem/Forsyth County Utility Commission B&V Project 145730
Winston-Salem,North Carolina First Issue: December 15, 2006
R.A. Thomas Water Treatment Plant Improvements Latest Revision: July 17,2007
Controls: Level sensors will be provided in the equalization basin for level
monitoring and control of the wash water equalization pumps
and mixers. Basin level will be transmitted to the plant control
system. At basin overflow level,an overflow alarm will be
transmitted to the plant control system.
The wash water equalization basin pumps will be automatically
alternated and started and stopped based on level in the wash
water equalization basin. Provisions will be made to start/stop
the pumps locally and from the plant control system. Pump
status and alarm conditions will be indicated locally and
transmitted to the plant control system.
4. Wash Water Clarifier.
Number 1
Basin Type Reinforced Concrete
Basin Dimensions
Inside wall diameter, ft 75
Inside weir diameter, ft 68.67
Sidewall water depth, ft 12
Total sidewall depth, ft 14
Water depth at center pier, ft 15.1
Floor radial slope to center 1:12
Hydraulic loading rate, gpm/sf
Average daily 0.18
Max daily 0.36
Sedimentation Basin Drain 0.72
Detention time, hr
Average daily 8.5
Minimum daily 4.2
Sedimentation Basin Drain 2.1
Weir type Perimeter; sharp crested,
V-notch
Weir loading rate, gpm/ft
Average 3.62
I-20

BLACK& VEATCH INTERNATIONAL COMPANY
CIVIL DESIGN MEMORANDUM
Winston-Salem/Forsyth County Utility Commission B&V Project 145730
Winston-Salem,North Carolina First Issue: December 15, 2006
R.A. Thomas Water Treatment Plant Improvements Latest Revision: July 17,2007
Maximum daily 7.24
Sedimentation Basin Drain 14.48
Control: Clarifier drive status and alarm conditions will be indicated
locally and transmitted to the plant control system.
The clarifier residual drain valve will be opened and closed
automatically either(1) based on an operator selectable cycle
time set point for number of hours of plant operation or(2) a
total accumulated wash water clarifier flow volume between
blow-downs. The plant control system will open the valve for an
operator-entered duration and close the valve for the remainder
of the cycle. In Flow mode, the valve open duration will be the
same as the Time mode"open duration setpoint". The basis for
automatic control ("timed"or"flow"),the cycle time set point,
and the flow volume set point is entered at the plant control
system workstation computers. Provision will be made to open
and close the residuals drain valve locally and from the plant
control system.
5. Residuals Pumping Station.
The existing residuals pumping station will remain. The contents of the
station will be demolished and completely renovated. The following new
facilities will be provided:
• Residuals pumps and associated pump controls
• Electrical room
• Piping and valves
• Monorail
• Plumbing
• HVAC
• Doors
• Handrail and guardrail
• Protective coatings
• Electrical
1-21

BLACK&VEATCH INTERNATIONAL COMPANY O ANY
CIVIL DESIGN MEMORANDUM
Winston-Salem/Forsyth County Utility Commission B&V Project 145730
Winston-Salem,North Carolina First Issue: December 15, 2006
R.A. Thomas Water Treatment Plant Improvements Latest Revision: July 17,2007
• Instrumentation and control system
Under maximum residuals drainage conditions from the sedimentation
basins and wash water clarifier,two pumps are required with one standby
pump available. In the event the wash water clarifier is taken offline for
maintenance, the wash water equalization basin flow will be drained into the
pumping station wetwell, and three pumps will be required with no standby
pumps available. During this wash water clarifier maintenance period,the
equalization basin level must be limited to approximately half full to limit
the flow rate into the residuals pumping station wetwell.
Residuals Pumps
Type of pump Horizontal end suction
centrifugal
Number of pumps 3
Rated capacity, each, gpm 200
Rated head, ft 46
Operating head range, ft 24-46
Motor brake horsepower, each, bhp 10
Controls: The residuals pumps will be automatically alternated and started
and stopped based on level in the residuals pumping station wet
well. Provisions will be made to start/stop the pumps locally
and from the plant control system. Pump status and alarm
conditions will be indicated locally and transmitted to the plant
control system.
6. Residuals Storage Lagoons.
The existing residuals storage lagoons will be expanded and modified to
receive all plant residuals for storage. The design criteria provided herein is
based upon a design thickened residual concentration of 5%.
Number of lagoons 2
Lagoon type Earthen lagoon with concrete slope
protection and underdrain
I-22

BLACK&VEATCH INTERNATIONAL COMPANY
CIVIL DESIGN MEMORANDUM
Winston-Salem/Forsyth County Utility Commission B&V Project 145730
Winston-Salem,North Carolina First Issue: December 15, 2006
R.A. Thomas Water Treatment Plant Improvements Latest Revision: July 17,2007
Dimensions, each, ft
Length 31 1
Width 157
Max residuals depth 8
Max water depth 10
Freeboard 2
Perimeter slope 2:1
Liquid volume, each, mg 2.8
Storage volume, each, mg 2.1
Effective storage, each lagoon,
days 365
Access Ramp
Width, ft 12
Slope,percent 10
Decant Discharge to wash water equalization
basin
Sludge removal method Air drying, excavate with front-end
loader or clam bucket
Cleaning duration,years 1
H. OPERATIONS BUILDING
The existing control building will be demolished and a new operations building will be
provided for administrative facilities, chemical feed and storage, and maintenance and
control facilities. Figures I-16 and I-17 showing the floor plans for the basement and
operating floor and Figure I-18 showing the building elevations are attached.
The following facilities will be provided:
Basement Floor
Bulk Liquid Chemical Storage Room
Coagulant(Alum) Storage Area
Zinc Orthophosphate Storage Area
Future Storage Areas
Sodium Hypochlorite Storage Area
Fluoride Storage Room
I-23

BLACK& VEATCH INTERNATIONAL COMPANY
CIVIL DESIGN MEMORANDUM
Winston-Salem/Forsyth County Utility Commission B&V Project 145730
Winston-Salem,North Carolina First Issue: December 15, 2006
R.A. Thomas Water Treatment Plant Improvements Latest Revision: July 17,2007
Sodium Hydroxide Storage Room
General Storage Room
Electrical Room
Operating Floor
Chemical Feed Area
Sodium Hydroxide Feed Area
Coagulant(Alum)Feed Area
Zinc Orthophosphate Feed Area
Sodium Bisulfite Feed Area
Polymer Feed Area(Wash Water, Filter-Aid)
Future Aqua Ammonia Room
Sodium Hypochlorite Room
Fluoride Room
Potassium Permanganate Room
Electrical Room
Chemical Delivery Test Room
Loading Dock
Maintenance Shop
Shop Office
General Storage
Lunch Room
Men's and Women's Locker Rooms and Restrooms
Utility Room (including washer and dryer facilities)
Storage Room
Control Room
Network Room
Operator's Laboratory
Work Room(Includes space for copiers and storage)
File Storage Room
Administrative Area
Offices (2)
Conference Room
Public Restroom
I-24

BLACK&VEATCH INTERNATIONAL COMPANY
CIVIL DESIGN MEMORANDUM
Winston-Salem/Forsyth County Utility Commission B&V Project 145730
Winston-Salem,North Carolina First Issue: December 15, 2006
R.A. Thomas Water Treatment Plant Improvements Latest Revision: July 17,2007
Air conditioning will be provided for the lunch room, conference room,public
restroom and locker rooms, control room, administrative area, network room,work
room, file storage, shop office, and operator's laboratory.
A traveling bridge crane with electrically operated bridge, trolley, and hoist will be
provided in the Maintenance Shop.
A sampling system will be provided for continuous delivery of samples to a sample
sink in the Operator's Laboratory.
I. CHEMICAL FEED AND STORAGE
1. General.
a. Systems. Chemical feed and storage facilities will be provided for the
following chemicals used in the treatment processes: sodium hypochlorite,
coagulant(aluminum sulfate or ferric sulfate), hydrofluosilicic acid,zinc
orthophosphate, sodium hydroxide, sodium bisulfite, filter-aid polymer,
wash water polymer, and potassium permanganate. Space will also be
provided for possible future chemical feed and storage facilities for
ammonia, filter-top aluminum sulfate, and chlorine dioxide.
The chemical feed and storage systems will be located in the operations
building and will be sized to accommodate the feed equipment required
for a capacity of 18 mgd. No provisions are being provided for capacity
expansion in the future.
Space for chemical storage facilities for the future aqua ammonia system
will be provided remote from the operations building. Space will be
reserved in the chemical feed area for the ammonia feed pumps.
Space for chemical storage facilities for a future chlorine dioxide feed
system will be reserved in the basement of the operations building. The
potassium permanganate feed room will be converted to a chlorine dioxide
feed room.
I-25

BLACK&VEATCH INTERNATIONAL COMPANY
CIVIL DESIGN MEMORANDUM
Winston-Salem/Forsyth County Utility Commission B&V Project 145730
Winston-Salem,North Carolina First Issue: December 15, 2006
R.A. Thomas Water Treatment Plant Improvements Latest Revision: July 17,2007
Chemical feed data and points of application are indicated in Table I-1.
Chemical storage data is indicated in Table I-2. Points of chemical
application are also indicated in the Process Flow Schematic, Figure I-1.
Chemical feed equipment data are presented in the Chemical Feed Design
Memorandum.
b. Sizing. Chemical metering pumps will be sized for the maximum expected
dosages and the design plant flow. The metering pumps will also be
designed for minimum dosage rates at a minimum plant flow of 6.0 mgd,
or 3.0 mgd per train. Standby metering pumps will be provided for each
chemical feed application point.
Chemical storage facilities will be designed for a minimum of 30 days
storage at the average dosage and the average plant flow of 10 mgd. At
least 5 days storage will be provided at the maximum dosage and
maximum plant flow.
All day tanks except the fluoride day tank will be designed for at least 30
hours storage at average dose and the average plant flow of 14 mgd. The
fluoride day tank will be designed for 24 hours storage at maximum dose
and the maximum plant flow of 18 mgd.
c. Monitoring and Controls. All chemical feed systems will be equipped for
pacing based on flow. Chemical feed flow pacing to the raw water
influent header will be based on summation of the Yadkin River and
Salem Lake flowmeter signals. Flow pacing to each train's rapid mix and
filter influent flume will be based on each train's influent flowmeter
signal. Flow pacing to a filter effluent flume will be based on summation
of filter effluent flowmeter signals from all filters serving the flume
(flowmeter signals from filters which are in a filter-to-waste cycle will not
be included in summation).
Provisions will be made to manually adjust, start, and stop each feed
system from the control room and locally. Status and alarm signals will be
indicated locally and transmitted to the control room for the metering
pumps and other feed equipment.
I-26

BLACK& VEATCH INTERNATIONAL COMPANY
CIVIL DESIGN MEMORANDUM
Winston-Salem/Forsyth County Utility Commission B&V Project 145730
Winston-Salem,North Carolina First Issue: December 15, 2006
R.A. Thomas Water Treatment Plant Improvements Latest Revision: July 17,2007
Bulk storage tanks will be equipped with site gauges for local indication
and level sensors for level indication at the truck unloading station and the
plant control system.
2. Chemical Y
Storage and Feed Systems. Refer to the Chemical Feed section for
detailed information regarding the specific chemical storage and feed systems to
be provided.
J. AUXILIARY SYSTEMS
1. Sampling System. Water samples will be obtained from various locations within
the treatment process and piped to a sample sink located in the operator's
laboratory and the wet chemistry laboratory in the operations building. Sample
pumps will be provided where water pressure is inadequate to deliver the water
to the sample sinks. The sample locations are as follows:
Raw Water Supply
• Salem Lake raw water transmission main
• Yadkin River raw water transmission main
Raw Water Combined
• Combined raw water influent
Coagulated
• 1-1/2 minutes after 2nd stage Rapid Mix No 1 at average flow
• 1-1/2 minutes after 2nd stage Rapid Mix No 2 at average flow
Settled
• Filter Influent Flume No. 1
• Filter Influent Flume No. 2
Filtered Water
• Filter Effluent Flume before chemical addition
Finished Water
• Filter Effluent Flume after chemical addition.
Point of Entry
• Finished water transmission main
Waste flows from the sample sinks will discharge to the sanitary sewer system.
I-27

BLACK&VEATCH INTERNATIONAL COMPANY
CIVIL DESIGN MEMORANDUM
Winston-Salem/Forsyth County Utility Commission B&V Project 145730
Winston-Salem,North Carolina First Issue: December 15, 2006
R.A. Thomas Water Treatment Plant Improvements Latest Revision: July 17,2007
Sample taps will be provided for collecting samples from each raw water
influent line, each filter effluent line, the wash water supply line,the combined
filter effluent before chemical addition, and the finished water pumping station
discharge.
2. Continuous Water Quality Monitoring. Continuous water quality monitoring
will be provided. The instrumentation and location of the samples collected for
monitoring are as follows:
a. Turbidity Analyzer.
Salem Lake raw water transmission main
Yadkin River raw water transmission main
Raw water influent
Filter influent flume (each flume, 2 total)
Filter effluent(each filter, 4 total)
Combined filter effluent
Combined filter effluent after chemical addition
Point of Entry
b. Chlorine Residual Analyzer.
Filter influent flume (each flume, 2 total)
Combined filter effluent
Combined filter effluent after chemical addition.
Point of Entry
c. pH.
Salem Lake raw water transmission main
Yadkin River raw water transmission main
Raw water influent
Rapid mix effluent(each basin, 2 total)
Combined filter effluent
Combined filter effluent after chemical addition
Point of Entry
d. Fluoride.
Combined filter effluent after chemical addition.
I-28

BLACK&VEATCH INTERNATIONAL COMPANY
CIVIL DESIGN MEMORANDUM
Winston-Salem/Forsyth County Utility Commission B&V Project 145730
Winston-Salem,North Carolina First Issue: December 15, 2006
R.A. Thomas Water Treatment Plant Improvements Latest Revision: July 17, 2007
e. Streaming Current Detectors.
Rapid mix effluent(each basin, 2 total)
f. Particle Counters.
Raw water influent
Filter influent flume(each flume, 2 total)
Filter effluent(each filter,4 total)
Combined filter effluent
g. Conductivity.
Raw water influent
h. Temperature.
Raw water influent(ph and temperature combined in one unit)
i. Pressure.
Point of Entry
Each monitoring point will be indicated locally and recorded in the plant control
system.
3. Plant Communications System. A plant intercom/paging system will be
provided for all buildings on the plant site. Additional details are included in the
Electrical Section.
4. Plant Security System. A plant security system will be provided for all buildings
on the plant site. System access cards will be compatible with the system
provided at the Northwest WTP.
K. SITE WORK
1. Treatment Plant Site. The existing plant site will be utilized for the new water
treatment plant. The site is located off Martin Luther King Jr. Boulevard.
I-29

BLACK&VEATCH INTERNATIONAL COMPANY
CIVIL DESIGN MEMORANDUM
Winston-Salem/Forsyth County Utility Commission B&V Project 145730
Winston-Salem,North Carolina First Issue: December 15, 2006
R.A. Thomas Water Treatment Plant Improvements Latest Revision: July 17,2007
The existing site consists of approximately 36 acres. A small tract of wooded
area exists at the southeast property boundary. Salem Creek borders the northern
property line.
Topographical surveying will be performed by Allied Associates, P.A.
2. Clearing. Clearing will be required for the expansion of the residuals storage
lagoons on the southeast corner of the property. Where possible, tree buffers
will remain to maintain an environmentally conscious, good neighbor
appearance.
3. Access Roads. The main plant access road will be relocated. A new plant
entrance from Martin Luther King Jr. Boulevard will be provided.
Vehicular access will be provided to the operations building, basin and filter
complex, finished water pumping station, residuals pumping station,wash water
equalization basin,wash water clarifier, residuals storage lagoons, and engine-
generator and fuel storage tank.
4. Fencing. New PVC coated securitychain c am link fencing and gates will be
provided around the entire plant perimeter to enclose the treatment facility. The
new main plant entrance will be provided with an automatic entrance gate
equipped with a call box and security surveillance system.
I-30

Section 7: Effluent and Intake
Characteristics
Chronic WET TestingHistoryJanuary
2017 — Present
Required Testing as Per Current
Permit History September 2020-
September 2021
Flow Data September 2020 —
September 2021
Table A Conventional and Non-
Conventional Pollutants
Table B Toxic Metals, Cyanide, Total
Phenols and Organic Toxic Pollutants
Table C Certain Conventional and
Non-Conventional Pollutants
Table D Certain Hazardous Substances
and Asbestos
Table E 2,3,7,8Tetrachlorodibenzo P
Dioxin (2,3,7,8 TCDD)

R.A.Thomas Water Treatment Plant
Production Capacity
City of Winston-Salem
NPDES ID#= NC0079821
Chronic WET Toxicity Sampling History January 2017 -October 2021
Repeat Sample
Date Collected Contract Lab Pass/Fail (Y/N) Comments
1/10/2017 Meritech FAIL N
4/11/2017 Meritech PASS N
7/11/2017 Meritech PASS N
1/11/2018 Meritech PASS N
4/10/2018 Meritech PASS N
7/10/2018 Meritech PASS N
10/4/2018 Meritech PASS N
1/8/2019 Meritech PASS N
4/2/2019 Meritech PASS N
7/9/2019 Meritech PASS N
10/8/2019 Meritech FAIL Y 3rd Quarter Repeat
11/5/2019 Meritech PASS N
1/7/2020 Meritech FAIL Y 4th Quarter Repeat
2/4/2020 Meritech FAIL Y 1st Quarter Repeat
3/3/2020 Meritech PASS N
4/7/2020 Meritech PASS N
7/7/2020 Meritech PASS N
10/6/2020 Meritech PASS N
1/5/2021 Meritech PASS N
4/6/2021 Meritech PASS N
7/13/2021 Meritech FAIL N
8/3/2021 Meritech PASS Y 3rd Quarter Repeat
10/5/2021 Meritech PASS N

R.A. Thomas Water Treatment Plant Page 1 of 3
Production Capacity
City of Winston-Salem
NPDES ID# = NC0079821
Sampling Data September 2020-September 2021
Analyte
Date Collected TRC TSS Total-N Total-P Al Copper T-FI T-Hard Turb Zn
Units µg/L mg/L mg/L mg/L µg/L µg/L mg/L mg/L NTU µg/L
9/8/2020 9.0 3.8 2.5
9/14/2020 <2.0 2.9 3.4
9/21/2020 12.0 3.2 4.0
9/28/2020 6.0 <2.5 1.7
10/5/2020 5.0 2.7 0.78 <0.04 305.0 <10.0 0.18 16.0 2.1 45.0
10/6/2020 <2.0
10/8/2020 <2.0 - -
10/12/2020 4.0 3.1 3.7
10/19/2020 4.0 3.3 5.0
10/26/2020 <2.0 2.5 1.6
11/2/2020 4.0 4.2 4.0
11/9/2020 6.0 2.6 4.1
11/16/2020 3.0 3.6 4.6
11/23/2020 <2.0 3.7 7.8
11/30/2020 12.0 4.1 12.0
12/7/2020 <2.0 6.4 20.0
12/14/2020 10.0 4.1 5.1
12/21/2020 <2.0 2.7 7.7
12/28/2020 <2.0 2.9 3.3
1/4/2021 <2.0 2.6 1.00 <0.04 414.0 <10.0 0.15 18.0 3.1 53.0
1/5/2021 <2.0
1/7/2021 <2.0
1/11/2021 <2.0 <2.5 3.3
1/19/2021 <2.0 <2.5 7.6
1/25/2021 <2.0 2.6 6.0

R.A. Thomas Water Treatment Plant Page 2 of 3
Production Capacity
City of Winston-Salem
NPDES ID# = NC0079821
Sampling Data September 2020-September 2021
Analyte
Date Collected TRC TSS Total-N Total-P Al Copper T-FI T-Hard Turb Zn
Units µg/L mg/L mg/L mg/L µg/L µg/L mg/L mg/L NTU µg/L
2/1/2021 <2.0 3.2 5.3
2/8/2021 20.0 2.8 3.6
2/15/2021 <2.0 <2.5 3.3
2/22/2021 <2.0 8.2 12.0
3/1/2021 <2.0 <2.5 2.2
3/8/2021 <2.0 3.5 6.7
3/15/2021 <2.0 <2.5 3.1
3/22/2021 <2.0 <2.5 2.6
3/29/2021 2.0 <2.5 3.0
4/5/2021 <2.0 3.1 0.85 <0.04 418.0 <10.0 0.23 18.0 3.4 43.0
4/6/2021 <2.0
4/8/2021 6.0
4/12/2021 <2.0 6.8 4.5
4/19/2021 14.0 7.1 4.4
4/26/2021 3.0 4.1 2.6
5/3/2021 <2.0 3.4 4.3
5/10/2021 16.0 3.2 2.4
5/17/2021 <2.0 <2.5 1.4
5/24/2021 <2.0 <2.5 2.0
6/1/2021 <2.0 3.5 1.8
6/7/2021 <2.0 2.9 1.7
6/14/2021 <2.0 <2.5 1.9
6/21/2021 6.0 <2.5 2.0
6/28/2021 9.0 <2.5 1.2
7/6/2021 17.0 3.1 1.40 0.1 538.0 <10.0 0.17 22.0 3.1 42.0

R.A. Thomas Water Treatment Plant Page 3 of 3
Production Capacity
City of Winston-Salem
NPDES ID# = NC0079821
Sampling Data September 2020-September 2021
Analyte
Date Collected TRC TSS Total-N Total-P Al Copper T-FI T-Hard Turb Zn
.
Units µg/L mg/L mg/L mg/L µg/L µg/L mg/L mg/L NTU µg/L
7/9/2021 <2.0 - - -
7/12/2021 12.0 3.3 - 2.8
7/13/2021 11.0
7/15/2021 11.0
-
7/19/2021 4.0 3.4 2.9
7/26/2021 18.0 <2.5 2.2
-8/1/2021 7.0
- -
8/2/2021 2.0 5.5 _ _ _ 3.3
8/5/2021 4.0
-
8/9/2021 5.0 2.6 2.2
-
-
8/16/2021 9.0 <2.5 _ 2.6
8/23/2021 5.0 <2.5 - _ - 2.0
8/30/2021 3.0 5.8 4.4
9/7/2021 8.0 3.8 _ _ 2.5
9/13/2021 7.0 4.3 _ 2.5
9/20/2021 4.0 4.9 _ _ - _ 2.4
9/27/2021 <2.0 4.3 3.7
Max 20.0 8.2 1.4 0.1 538.0 0.0 0.2 22.0 20.0 53.0

0. ri ri .� O N N O l0 <-1i O r ri Oi O m O CO ri O N M .--� C U'I ri O N CO M N ut O N L
M N <--1 <--1 N <-1 <-1 M <--1 ri N .--1 N C M ri <-1 C r-1 <-1 N N r-1 Ifl C C ri N n -1 C N
in 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 ri O O O h 0 ri O
Cd l0 CT 00 O n N N c-I O .-1 N N C N l0 M N C N C O •--4 M O O N ri ri I. •--1 C O N N
N ri N M r-1 N N c-I N N c-I c-I N N ri N <--1 ri M O ri <--1 <-1 M N <--1 N ri ri M ri CO O M
< O O O O O O O O O O O O O O O O O O O M c-1 0 0 0 0 0 0 0 0 0 0 Ol O M O
ri CO O ri M r I Cr C ri N ri O N a-i N N r-I m ri C O C C <--4 00 .-1 .-1 n M M l0 O C ri
ri N a--I Ul M ri ri N UI ri N ri ri N <-1 N N <-1 <-1 N N <-1 N N <-1 N a--1 N M N N C ri Ll N
4 0 0 0 0 0 0 0 0 0 0 0 0 0 C C 0 0 0 d 0 0 0 0 0 0 0 0 0 0 0 0 lO O O O
O c-I c-I c-I c-I N N. <-1 m O <-1 <-1 C ri C O N ri r1 v 1 N r-1 ri N e-1 Cr O O lO
C 1--1 N c-1 <-1 N <--1 i-1 N r-1 i--1 N <-1 ri N M <-1 N N .--1 N ri <-1 N c-1 4--1 N .-i <--1 N <--1 n U ri
- 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 op 0 0 0 0 0 0 0 0 0 0 0 0 0 C 0 0 0
N
NT -1 O U1 rti ri l0 M a--I O N O N LU c-1 N N ri N <--1 O r-1 <-1 ri O N <--1 N O ri N <-1 l0 O l0 If1
IC ri ri NJ ri .-i N <--1 r 1 NJ .--1 •-i N <--1 ri N 1-1 r 1 N .-1 .-1 N <-1 ri N r-I c-I N r-I <--1 N .-i UI r 1 N -1
2 0 0 0 O O O O O O O O O O O O O O O O O O O O O O O O O O O O C O 0 0
1.0 Q1 O <-1 01 01 lO O O N ri a--1 C a--I C O .--1 N O r-1 N l0 N U1 ri LU O ri O O n 0 Q1 l0
G c-1 -I N c-1 c-1 N ri ri N 1--1 1--1 N N ri N ,--1 1--1 N e--I ri N 41 N c-I 4--1 N 4--1 ri N 00 1--1 N ri
Q 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 C 0 0 0
L
C
C
cC .-i co -1 C M M CO C C M ci O N M C N O N LU r C M r-1 Ol Ul a-i l0 Ul O N a-i
C Ul C ri N ri ri N ri ri N r-1 ri N c-I ri M ri ri N ri ri N. N ri N ri ri M ri ri N C ri n
2 0 0 0 O O O O O O O O O O O O O O O O O O O O O O O O O O O O lO 0 0 0
I� U1 N 00 O N c-I M r 1 N 01 N M lO N N 00 M CO c-I lO lO ri O1 N,N N ri 01 ri LU U1
L N N a-I NJ CO r-1 ri N ri c-I CO ri ri N ri ri N ri N CO U) O Ul N .-i M .-I r-I Ci ri O N
Gl
LL O O O O O O O O O O O O O O O 0 0 0 0 0 0 ri O O O O O O lO O ri O
ri ri l0 Ln Ui C v 0 ri C 0 N ri 0 M ri r-I M ri ri N N O N N ri CO ri ri l0 N Ql O U1 I,
C ri ri N M M M ri ri N ri ri N ri c-1 N ri ri N r-1 e-I N r-I ri N ri ri N ri ri N ri ri ri M <-1
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Ul O O O
LJ Ul O O O N CO In N N N a-I CO N 01 lO l0 N N LC/ N co N O r-i C CO r♦ L0 N n Lfl O n N UI
y N M ri M c-I ri M ri O c-I ri r-I M ri N Cl" N ri N M r-I N ri a-I N N N CO N ri M Ol O N N
i1 0 0 0 0 0 C 0 0 0 0 O 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 o o N o -I o
N
O
N
N
d > CO CO N U1 Ql N ri CO N co 1-0 (.0 M LU C I11 ri ri 00 C N lO n CO C M a--I 00 ri ri O ri 00 LO
C £ 0 U1 ri ri M ri ri M ri M M M ri UI N r-1 N N e-I N a--I ri M ri c-I N ri ri N ri ri CO r-1 M
« N Z 0 0 0 0 0 00 0 0 ri 0 0 0 0 0 00 0 0 0 0 0 00 0 0 0 0 00
a � o
O1 i
C 0 y+ .-IQl M C) M O ri C N O Ul M O 01 CO LU M N O N N O M .1 N UI N U) O N Ul C O CT <-1
l� ri C M O N a-I N N ri ri N ri O l0 N ri N ri ri N ri ri N ri ri N ri U1 U1 ci ri ul O 4.0
N
ry N O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O lO d 0
- E co
F N 41 n L
N O
3 a C U LID O U1 ri lO N O CO U ri N a-I N IT Ul U1 M ri ri lO O Ci N N ri U) N r-1 N ri 01 M M
Ip 0 Z Q c-I 00 N ri N c-1 ri O U1 ri N 4-1 ri N O N N ri ri N ri ri N ri ri N a--1 N M ri O O O N
uii II N 0 0 0 0 0 0 ri 0 0 0 0 0 0 06 0 0 0 06 0 0 06 0 0 0 0 0 O ri O
m C C
G G 0 A
L w N CI
F 0 Lu
• C « C O tCD
0 r1 N M C in t0 n 00 CT O ri N M C N lO n 00 CJl O r1 7 C
c 1 U Z u. O ri N M R N LD n co CT ri ri ri ri ri ri ri ri ri ri NNNNN N NNNNMM N Q

EPA Identification Number NPDES Permit Number Facility Name Outfall Number Form Approved 03/05/19
N/A NC0079821 R.A.Thomas WTP 001 OMB No.2040-0004
TABLE A.CONVENTIONAL AND NON CONVENTIONAL POLLUTANTS(40 CFR 122.21(g)(7)(iii))1
Effluent Intake
Waiver (Optional)
Pollutant Requested Units Maximum Maximum Long-Term
(if applicable)
(specify) Daily Monthly Average Daily Number of Long-Term Number of
Discharge Discharge Discharge Analyses Average Value Analyses
(required) (if available) (if available)
❑ Check here if you have applied to your NPDES permitting authority for a waiver for all of the pollutants listed on this table for the noted outfall.
1 Biochemical oxygen demand ❑ Concentration Not required
(BOD5) Mass
2 Chemical oxygen demand ❑ Concentration Not required
(COD) Mass
Concentration Not required
3. Total organic carbon(TOC) ❑✓
Mass
Concentration mg/L 20.0 5.3 3.4 (1)-Weekly
4. Total suspended solids(TSS) 0
Mass
Concentration mg/L 0.17 0.17 0.09 (1)-Qrty
5. Ammonia(as N) ❑✓
Mass
6. Flow ❑ Rate MGD 3.07 9.85 0.22 Continuous
Temperature(winter) ❑✓ °C °C Not required
7.
Temperature(summer) ❑✓ °C °C Not required
pH(minimum) 0 Standard units s.u. 7.2 7.0 6.6 (1)-Weekly
8.
pH(maximum) 0 Standard units S.U. 7.2 7.0 6.6 (1)-Weekly
1 Sampling shall be conducted according to sufficiently sensitive test procedures(i.e.,methods)approved under 40 CFR 136 for the analysis of pollutants or pollutant parameters or
required under 40 CFR chapter I,subchapter N or 0.See instructions and 40 CFR 122.21(e)(3).
EPA Form 3510-2C(Revised 3-19) Page 9

This page intentionally left blank.

EPA Identification Number NPDES Permit Number Facility Name Outfall Number Form Approved 03/05/19
N/A NC0079821 R.A.Thomas WTP OMB No.2040-0004
TABLE B.TOXIC METALS,CYANIDE,TOTAL PHENOLS,AND ORGANIC TOXIC POLLUTANTS(40 CFR 122.21(g)(7)(v))1
Presence or Absence Intake
(check one) Effluent
(optional)
Pollutant/Parameter Testing Units Long-Term
(and CAS Number,if available) Required Believed Believed (specify) Maximum Maximum Average Number Long- Number
Present Absent Daily Monthly Term
aily of of
Di
scharge harge Discharge
f available)
Discharge harge Analyses AverageValue Analyses
(required)uired
(if available)
❑ Check here if you qualify as a small business per the instructions to Form 2C and,therefore,do not need to submit quantitative data for any of the organic toxic pollutants in Sections
2 through 5 of this table.Note,however,that you must still indicate in the appropriate column of this table if you believe any of the pollutants listed are present in your discharge.
Section 1.Toxic Metals,Cyanide,and Total Phenols
Antimony,total Concentration
1.1 (7440-36-0) Mass
Arsenic,total Concentration
1.2 (7440-38-2) 0 Mass
Beryllium,total Concentration
1.3 (7440-41-7) Mass
Cadmium,total Concentration
1.4 (744043-9) Mass
Chromium,total Concentration
1.5 (7440-47-3) El 0 El
Mass
Copper,total Concentration ug/L <10.0 <10.0 <10.0 (1)-Qtr
1.6 (7440-50-8) Mass
Lead,total Concentration
1.7 (7439-92-1) 0 El El
Mass
Mercury,total Concentration
1.8 (7439-97-6) Mass
Nickel,total Concentration
1.9 (7440 02 0) 0 0 El
Mass
1.10 Selenium,total Concentration
0 0 0
(7782-49-2) Mass
Silver,total Concentration
i1.11 (7440-22-4) Mass
EPA Form 3510-2C(Revised 3-19) Page 11

EPA Identification Number NPDES Permit Number Facility Name Outfall Number Form Approved 03/05/19
N/A NC0079821 R.A.Thomas WTP OMB No.2040-0004
TABLE B.TOXIC METALS,CYANIDE,TOTAL PHENOLS,AND ORGANIC TOXIC POLLUTANTS(40 CFR 122.21(g)(7)(v))1
Presence or Absence
(check one) Effluent Intake
(optional)
Pollutant/Parameter Testing Units Long-Term
(and CAS Number,if available) Required Believed Believed (specify) Maximum Maximum Average Number Long-
(and
Present Absent Daily Monthly Term
Discharge( of of
required) (if Discharge isDcharge Analyses aily Average Analyses
( q ) ( available) (if available) Value
Thallium,total Concentration
1.12 (7440-28-0) El 0 ✓
Mass
Zinc,total Concentration ug/L 53.0 53.0 45.8 (1)-Qtr
1.13 (7440-66-6) 0 0 Mass
1.14 Cyanide,total Concentration
El El El
(57-12-5) Mass
1.15 Phenols,total 0 0 Concentration
Mass
Section 2.Organic Toxic Pollutants(GC/MS Fraction—Volatile Compounds)
Acrolein Concentration
2.1 (107-02-8) El El El
Mass
2.2 Acrylonitrile Concentration
0 El El
(107-13-1) Mass
2.3 Benzene Concentration
1:1 El El
(71-43-2) Mass
2.4 Bromoform Concentration
(75-25-2) Mass _
2.5 Carbon tetrachloride ElConcentration
El I=1(56-23-5) Mass
Chlorobenzene 0 Concentration
2.6 (108-90-7) Mass
Chlorodibromomethane ✓ Concentration
2.7 (124-48-1) 0 0 � Mass
2.8 Chloroethane Concentration
(75-00-3) Mass
EPA Form 3510-2C(Revised 3-19) Page 12

EPA Identification Number NPDES Permit Number Facility Name Outfall Number Form Approved 03/05/19
N/A NC0079821 R.A.Thomas WTP OMB No.2040-0004
TABLE B.TOXIC METALS,CYANIDE,TOTAL PHENOLS,AND ORGANIC TOXIC POLLUTANTS(40 CFR 122.21(g)(7)(v))1
Presence or Absence
(check one) Effluent Intake
(optional)
Pollutant/Parameter Testing Units Long-Term
(and CAS Number,if available) Required Believed Believed (specify) Maximum Maximum Average Number Long- Number
Present Absent Daily Monthly Term
aily of of
Dieghard) ifavalabe) DisDcharavailablge Analyses Averageischare Value Analyses
(if e)
2.9 2-chloroethylvinyl ether 0 Concentration
(110-75-8) Mass
2.10 Chloroform(67-66-3) 0 0 Concentration
Mass
2.11 Dichlorobromomethane Concentration
0 El El
(75-27-4) Mass
212 11-dichloroethane 0 Concentration
(75-34-3) Mass
2.13 1,2-dichloroethane Concentration
(107-06-2) Mass
2.14 1,1-dichloroethylene Concentration
(75-35-4) Mass
2.15 1,2-dichloropropane Concentration
(78-87-5) Mass
2.16 13-dichloropropylene � Concentration
(542-75-6) Mass
2.17 Ethylbenzene Concentration
1:1 El El
(100-41-4) Mass
2.18 Methyl bromide � Concentration
(74-83-9) Mass
2.19 Methyl chloride Concentration
0 El El
(74-87-3) Mass
2.20 Methylene chloride 0 0 Concentration
(75-09-2) Mass
221 1,1,2,2-tetrachloroethane Concentration
(79-34-5) Mass
EPA Form 3510-2C(Revised 3-19) Page 13

EPA Identification Number NPDES Permit Number Facility Name Outfall Number Form Approved 03/05/19
N/A NC0079821 R.A.Thomas WTP OMB No.2040-0004
TABLE B.TOXIC METALS,CYANIDE,TOTAL PHENOLS,AND ORGANIC TOXIC POLLUTANTS(40 CFR 122.21(g)(7)(v))1
Presence or Absence
(check one) Effluent Intake
(optional)
Pollutant/Parameter Testing Units Long-Term
(and CAS Number,if available) Required Believed Believed (specify) Maximum Maximum Average Number Long- Number
Present Absent Daily Monthly Term
of
veragischarge
( of
Drequired)
if available) DisDcharge Analyses AValuee Analyses
re uired
(if available)
Tetrachloroethylene � Concentration
2.22 0 El
(127-18-4) Mass
Toluene Concentration
2.23 (108-88-3) Mass
2 24 1 2-trans-dichloroethylene 0 Concentration
(156-60-5) Mass
11,1-trichloroethane � 0 Concentration
2.25 (71-55-6) Mass
2.26 1,1,2-trichloroethane 0 Concentration
(79-00-5) Mass
2 27 Trichloroethylene 0 Concentration
(79-01-6) Mass
2.28 Vinyl chloride 0 0 Concentration
(75-01-4) Mass
Section 3.Organic Toxic Pollutants(GC/MS Fraction—Acid Compounds)
3.1 2-chlorophenol Concentration
(95-57-8) Mass
3.2 2 4-dichlorophenol 0 Concentration
0 El
(120-83-2) Mass
3.3 2,4-dimethylphenol 0 Concentration
(105-67-9) Mass
3.4 4,6-dinitro-o-cresol 0 0 Concentration
El
(534-52-1) Mass
3.5 2,4-dinitrophenol 0 Concentration
(51-28-5) Mass
EPA Form 3510-2C(Revised 3-19) Page 14

EPA Identification Number NPDES Permit Number Facility Name Outfall Number Form Approved 03/05/19
N/A NC0079821 R.A.Thomas WTP OMB No.2040-0004
TABLE B.TOXIC METALS,CYANIDE,TOTAL PHENOLS,AND ORGANIC TOXIC POLLUTANTS(40 CFR 122.21(g)(7)(v))1
Presence or Absence Intake
(check one) Effluent (optional)
Pollutant/Parameter Testing Units Long-Term
(and CAS Number,if available) Required Believed Believed (specify) Maximum Maximum Average Number Long- Number
Present Absent Daily Monthly Term
( aily of of
Drequired)
Of available) De isDcharge Analyses AverageValue Analyses
re cared
(if available)
3.6 2-nitrophenol Concentration
(88-75-5) Mass
3.7 4-nitrophenol 0 Concentration
El 0(100-02-7) Mass
3.8 P chloro m cresol 0 0 0 Concentration
(59-50-7) Mass
3.9 Pentachlorophenol 0 0 Concentration
(87-86-5) Mass
3.10 Phenol Concentration
(108-95-2) Mass
3.11 2,4,6-trichlorophenol 0 0 Concentration
(88-05-2) Mass
Section 4.Organic Toxic Pollutants(GC/MS Fraction—Base/Neutral Compounds)
4.1 Acenaphthene 0 0 Concentration
(83-32-9) Mass
Acenaphthylene � Concentration
4.2 (208-96-8) Mass
4.3 Anthracene Concentration
(120-12-7) Mass
4,4 Benzidine Concentration
El 0 CI
(92-87-5) Mass
4.5 Benzo(a)anthracene 0 El Concentration
(56-55-3) Mass
,
4.6 Benzo(a)pyrene � � Concentration
(50-32-8) Mass
EPA Form 3510-2C(Revised 3-19) Page 15

EPA Identification Number NPDES Permit Number Facility Name Outfall Number Form Approved 03/05/19
N/A NC0079821 R.A.Thomas WTP OMB No.2040-0004
TABLE B.TOXIC METALS,CYANIDE,TOTAL PHENOLS,AND ORGANIC TOXIC POLLUTANTS(40 CFR 122.21(g)(7)(v))1
Presence or Absence Intake
(check one) Effluent (optional)
Pollutant/Parameter Testing Units Long-Term
(and CAS Number,if available) Required Believed Believed (specify) Maximum Maximum Average Number Long- Number
Present Absent Daily Monthly Term
aily of of
Discharge
a Dischare(ifavalabe) DisDcharge Analyses AverageValue Analyses
(if available)
4.7 3,4-benzofluoranthene ❑ Concentration
(205-99-2) Mass
4.8 Benzo(ghi)perylene Concentration
El El 0
(191-24-2) Mass
4.9 Benzo(k)fluoranthene ❑ Concentration
(207-08-9) Mass
4.10 Bis(2-chloroethoxy)methane Concentration
(111-91-1) Mass
4.11 Bis(2-chloroethyl)ether Concentration
(111-44-4) Mass
4.12 Bis(2-chloroisopropyl)ether ❑ Concentration
(102-80-1) Mass
4.13 Bis(2-ethylhexyl)phthalate ❑ Concentration
(117-81-7) Mass
4.14 4-bromophenyl phenyl ether ❑ Concentration
(101-55-3) Mass
4.15 Butyl benzyl phthalate Concentration
(85-68-7) Mass
4.16 2-chloronaphthalene ❑ Concentration
(91-58-7) Mass
4-chlorophenyl phenyl ether Concentration
4.17 (7005-72-3) Mass
Chrysene Concentration
4.18 (218-01-9) CI � 0 Mass
4.19 Dibenzo(a,h)anthracene ❑ 0 Concentration
(53-70-3) Mass
EPA Form 3510-2C(Revised 3-19) Page 16

EPA Identification Number NPDES Permit Number Facility Name Outfall Number Form Approved 03/05/19
N/A NC0079821 R.A.Thomas WTP OMB No.2040-0004
TABLE B.TOXIC METALS,CYANIDE,TOTAL PHENOLS,AND ORGANIC TOXIC POLLUTANTS(40 CFR 122.21(g)(7)(v))l
Presence or Absence Intake
(check one) Effluent (optional)
Pollutant/Parameter Testing Units Long-Term
(and CAS Number,if available) Required Believed Believed (specify) Maximum Maximum Average Number Long- Number
Present Absent Daily Monthly Daily of Term of
Discharge Discharge Discharge Analyses AValuee Analyses
(required) (if available)
(if available)
4.20 1,2-dichlorobenzene Concentration
El 0 El
(95-50-1) Mass
4.21 1,3-dichlorobenzene Concentration
0 0 0
(541-73-1) Mass
4.22 1,4-dichlorobenzene Concentration
(106-46-7) Mass
4.23 3,3-dichlorobenzidine Concentration
0 El El
(91-94-1) Mass
4.24 Diethyl phthalate Concentration
El 0 El
(84-66-2) Mass
4.25 Dimethyl phthalate � Concentration
El
(131-11-3) Mass
4.26 Di-n-butyl phthalate 0 El © Concentration
(84-74-2) Mass
4.27 2,4-dinitrotoluene Concentration
(121-14-2) Mass
4.28 2,6-dinitrotoluene Concentration
(606-20-2) Mass
4.29 Di-n-octyl phthalate Concentration
El 0 El
(117-84-0) Mass
4.30 1,2-Diphenylhydrazine ElConcentration
El
(as azobenzene)(122-66-7) Mass
4.31 Fluoranthene Concentration
0 0 0
(206-44-0) Mass
4.32 Fluorene Concentration
0 0 0
(86-73-7) Mass
EPA Form 3510-2C(Revised 3-19) Page 17

EPA Identification Number NPDES Permit Number Facility Name Outfall Number Form Approved 03/05/19
N/A NC0079821 R.A.Thomas WTP OMB No.2040-0004
TABLE B.TOXIC METALS,CYANIDE,TOTAL PHENOLS,AND ORGANIC TOXIC POLLUTANTS(40 CFR 122.21(g)(7)(v))1
Presence or Absence Intake
(check one) Effluent
(optional)
Pollutant/Parameter Testing Units Long-Term
(and CAS Number,if available) Required Believed Believed (speci Maximum Maximum Long-
) DailyMonthlyAverage Number Number
Term
Present Absentof of
(Drequired)
(if available)ischarge
DisDcharge Analyses AverageValue Analyses
re ufiredired
(if available)
Hexachlorobenzene Concentration
4.33 (118-74-1) Mass
Hexachlorobutadiene Concentration
4.34 (87 68 3) Mass
4.35 Hexachlorocyclopentadiene El El Concentration
El
(77-47-4) Mass
4.36 Hexachloroethane Concentration
(67-72-1) Mass
4.37 Indeno(1,2,3-cd)pyrene 0 Concentration
(193-39-5) Mass
4.38 Isophorone Concentration
(78-59-1) Mass
4.39 Naphthalene O Concentration
(91-20-3) Mass
4.40 Nitrobenzene Concentration
(98-95-3) Mass
4.41 N-nitrosodimethylamine Concentration
(62-75-9) Mass
N-nitrosodi-n-propylamine � Concentration
4.42 (621-64-7) Mass
N-nitrosodiphenylamine Concentration
4.43 (86-30-6) Mass
Phenanthrene Concentration
4.44 El El El
(85-01-8) Mass
4.45 Pyrene Concentration
El 0 El
(129-00-0) Mass
EPA Form 3510-2C(Revised 3-19) Page 18

EPA Identification Number NPDES Permit Number Facility Name Outfall Number Form Approved 03/05/19
N/A NC0079821 R.A.Thomas WTP OMB No.2040-0004
TABLE B.TOXIC METALS,CYANIDE,TOTAL PHENOLS,AND ORGANIC TOXIC POLLUTANTS(40 CFR 122.21(g)(7)(v))1
Presence or Absence
(check one) Effluent Intake
(optional)
Pollutant/Parameter Testing Units Long-Term
(and CAS Number,if available) Required Believed Believed (specify) Maximum Maximum Average Number Long- Number
Present Absent Daily Monthly Term
DischargeDaily Average
of of
Discharge Analyses Analyses
(required)
(if available)
(if available)
4.46 1,2,4-trichlorobenzene ElConcentration
•
(120-82-1) Mass
Section 5.Organic Toxic Pollutants(GC/MS Fraction—Pesticides)
Aldrin Concentration
5.1 CI CI 0
(309-00-2) Mass
a-BHC Concentration
5.2 El El 0
(319-84-6) Mass
R-BHC Concentration
5.3 (319-85-7) Mass
El
y-BHC El 0 Concentration
5.4 (58 89 9) Mass
b-BHC Concentration
5.5 (319-86-8) Mass
5.6 Chlordane Concentration
CI CI 0
(57-74-9) Mass
4 4'-DDT Concentration
5.7 0 El El
(50-29-3) Mass
4,4'-DDE Concentration
5.8 (72-55-9) Mass
5.9 4,4'-DDD Concentration
(72-54-8) Mass
Dieldrin Concentration
5.10 0 El El
(60 57 1)
Mass
0
a-endosulfan CI 0 Concentration
5.11 (115-29-7) Mass
EPA Form 3510-2C(Revised 3-19) Page 19

EPA Identification Number NPDES Permit Number Facility Name Outfall Number Form Approved 03/05/19
N/A NC0079821 R.A.Thomas WTP OMB No.2040-0004
TABLE B.TOXIC METALS,CYANIDE,TOTAL PHENOLS,AND ORGANIC TOXIC POLLUTANTS(40 CFR 122.21(g)(7)(v)p
Presence or Absence Intake
(check one) Effluent (optional)
Pollutant/Parameter Testing Units Long-Term _
(and CAS Number,if available) Required Believed Believed (specify) Maximum Maximum Average Number Long Number
Present Absent Daily Monthly Term
Discharge q Discharge
d) f available) Daily Discharge Analyses AverageValue Analyses
(if available)
5.12 R endosulfan Concentration
(115-29-7) Mass
Endosulfan sulfate Concentration
5.13 (1031-07-8) 0 El 0 Mass
5.14 Endrin Concentration
El El 0
(72-20-8) Mass
Endrin aldehyde Concentration
5.15 (7421-93-4) Mass
5.16 Heptachlor Concentration
0 El El
(76-44-8) Mass
Heptachlor epoxide Concentration
5.17 (1024-57-3) 0 El 0
Mass
PCB-1242 Concentration
5.18 (53469-21-9) 0 0 0 Mass
PCB-1254 Concentration
5.19 (11097-69-1) 0 0 E Mass
PCB-1221 Concentration
5.20 (11104-28-2) El 0 E Mass
PCB-1232 Concentration
5.21 (11141-16-5) El 0 0 Mass
PCB-1248 Concentration
5.22 (12672-29-6) 0 El E Mass
PCB-1260 Concentration
5.23 (11096-82-5) 0 0 0 Mass
PCB-1016 Concentration
5.24 (12674-11-2) 0 0 0
Mass
EPA Form 3510-2C(Revised 3-19) Page 20

EPA Identification Number NPDES Permit Number Facility Name Outfall Number Form Approved 03/05/19
N/A NC0079821 R.A.Thomas WTP OMB No.2040-0004
TABLE B.TOXIC METALS,CYANIDE,TOTAL PHENOLS,AND ORGANIC TOXIC POLLUTANTS(40 CFR 122.21(g)(7)(v))1
Presence or Absence Intake
(check one) Effluent
(optional)
Pollutant/Parameter Testing Units Long-Term
(and CAS Number,if available) Required Believed Believed (specify) Maximum Maximum Average Number Long- Number
Present Absent Daily Monthly Term
( ily of of
Drequired)
Dischargef available) Discharge Analyses Average
Analyses
re uired
(if available)
Toxaphene Concentration
5.25 (8001-35-2) ❑ ❑ ✓❑ Mass
1 Sampling shall be conducted according to sufficiently sensitive test procedures(i.e., methods)approved under 40 CFR 136 for the analysis of pollutants or pollutant parameters or
required under 40 CFR chapter I,subchapter N or 0.See instructions and 40 CFR 122.21(e)(3).
EPA Form 3510-2C(Revised 3-19) Page 21

This page intentionally left blank.

EPA Identification Number NPDES Permit Number Facility Name Outfall Number Form Approved 03/05/19
N/A NC0079821 R.A.Thomas WTP OMB No.2040-0004
TABLE C.CERTAIN CONVENTIONAL AND NON CONVENTIONAL POLLUTANTS(40 CFR 122.21(g)(7)(vi)p
Presence or Absence
(check one) Effluent Intake
(Optional)
Pollutant Units Maximum Long-Term
Believed Believed (specify) Maximum Daily Long-Term
Present Absent Discharge Monthly Average Daily Number of Average Number of
(required) Discharge Discharge Analyses Value Analyses
(if available) (if available)
❑ Check here if you believe all pollutants on Table C to be present in your discharge from the noted outfall.You need not complete the"Presence or Absence"column of Table C for
each pollutant.
❑ Check here if you believe all pollutants on Table C to be absent in your discharge from the noted outfall.You need not complete the"Presence or Absence"column of Table C for
each pollutant.
1 Bromide 0 ❑ Concentration
(24959-67-9) Mass
Chlorine,total Concentration ug/L 17.0 (1)-Week
2' residual 0 0 Mass
3. Color 0 ❑✓
Concentration
Mass
Concentration
4. Fecal coliform 0 ✓❑ Mass
5 Fluoride ❑ 0 Concentration mg/L 0.23 0.23 0.18 (1)-Qtr
(16984-48-8) Mass
Concentration mg/L (1)-Qtr
6 Nitrate-nitrite ❑ ❑ Mass
Nitrogen,total Concentration mg/L 1.4 1.4 1.01 (1)-Qtr
7' organic(as N) El El
Concentration
8. Oil and grease 0 ✓❑
Mass
Phosphorus(as Concentration mg/L 0.1 0.1 0.1 (1)-Qtr
g' P),total(7723-14-0) 0 El
10. Sulfate(as SO4) 0 0 Concentration
(14808-79-8) Mass
Concentration
11. Sulfide(as S) 0 0
I Mass
EPA Form 3510-2C(Revised 3-19) Page 23

EPA Identification Number NPDES Permit Number Facility Name Outfall Number Form Approved 03/05/19
N/A NC0079821 R.A.Thomas WTP OMB No.2040-0004
TABLE C.CERTAIN CONVENTIONAL AND NON CONVENTIONAL POLLUTANTS(40 CFR 122.21(g)(7)(vi))l
Presence or Absence
(check one) Effluent Intake
(Optional)
Pollutant Units Maximum Long-Term
Believed Believed (specify) Maximum Daily Long-Term
Present Absent Discharge Monthly Average Daily Number of Average Number of
(required) Discharge Discharge Analyses Value Analyses
(if available) (if available)
12. Sulfite(as SO3) 0 ❑ Concentration
(14265-45-3) Mass
Concentration
13. Surfactants 0 ❑✓
Mass
14. Aluminum,total 0 ❑ Concentration ug/L 538 538 419 (1)-Qtr
(7429-90-5) Mass
15. Barium,total 0 ❑✓ Concentration
(7440-39-3) Mass
16. Boron,total ❑ ❑✓ Concentration
(7440.42-8) Mass
17. Cobalt,total ❑ ❑ Concentration
(7440-48-4) Mass
18 Iron,total ❑✓ 0 Concentration
(7439-89-6) Mass
19 Magnesium,total ❑ ❑✓ Concentration
(7439-95-4) Mass
Molybdenum, Concentration
20. total ❑ ❑✓
(7439-98-7) Mass
21 Manganese,total ❑✓ ❑ Concentration
(7439-96-5) Mass
22 Tin,total ❑ ❑✓ Concentration
(7440-31-5) Mass
23 Titanium,total 0 ❑✓ Concentration
(7440-32-6) Mass
EPA Form 3510-2C(Revised 3-19) Page 24

1
EPA Identification Number NPDES Permit Number Facili Name ty Outfall Number Form Approved 03/05/19
N/A NC0079821 R.A.Thomas WTP OMB No.2040-0004
TABLE C.CERTAIN CONVENTIONAL AND NON CONVENTIONAL POLLUTANTS(40 CFR 122.21(g)(7)(vi))l
Presence or Absence Intake
(check one) Effluent
(Optional)
Pollutant Units Maximum Long-Term
Believed Believed (specify) Maximum Daily Long-Term
Present Absent Discharge Monthly Average Daily Number of Average Number of
(required) Discharge Discharge Analyses Value Analyses
(if available) (if available)
24. Radioactivity
Alpha,total 0 0Concentration
Mass
totalConcentration
Beta,
0 ❑
Mass
Concentration
Radium,total 0 ✓❑ -
•
Mass
Concentration
Radium 226,total 0 Mass
1 Sampling shall be conducted according to sufficiently sensitive test procedures(i.e.,methods)approved under 40 CFR 136 for the analysis of pollutants or pollutant parameters or
required under 40 CFR chapter I,subchapter N or 0.See instructions and 40 CFR 122.21(e)(3).
EPA Form 3510-2C(Revised 3-19) Page 25
1