NC0079821_Permit Issuance_20090717

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irciDERR
• North Carolina Department of Environment and Natural Resources
Division of Water Quality
Beverly Eaves Perdue Coleen H. Sullins
Governor Director
July 17, 2009
David K. Saunders
City of Winston-Salem / Forsyth County Utilities
P. 0. Box 2511
Winston-Salem, North Carolina 25111
Subject: Issuance of NPDES
Permit NCO079821
R A Thomas WTP
Forsyth County
Dear Mr. Saunders:
Dee Freeman
Secretary
Division personnel have reviewed and approved your application for renewal of the subject permit. Accordingly,
we are forwarding the attached NPDES discharge permit. This permit is issued pursuant to the requirements
of North Carolina General Statute 143-215.1 and the Memorandum of Agreement between North Carolina and
the U.S. Environmental Protection Agency dated October 15, 2007 (or as subsequently amended).
Division of Water Quality response to June 6, 2009 comments to draft permit;
1. Your request to change the Monthly Average Flow to 25.0 MGD has been approved.
2. Your request to change the monitoring frequency for Iron to Quarterly has been denied at this time. A
review of the facility DMR sampling data indicates your facility discharge has a Reasonable Potential to
exceed the Water Quality Action Level Standard of 1.0 mg/L for Iron.
3. Your request for inclusion of additional language in footnote #6 —"Ammonia nitrogen monitoring only
applies if the facility chloraminates" is approved and included in the final permit.
4. Your request to remove Special Condition A. (3). — Facility restart of the renovated Thomas Plant has
been approved for the reasons noted in your June 6, 2009 letter.
5. Your request to change the Latitude and Longitude on your permit site map has been approved.
6. Any facility can request that the Division reduce or eliminate monitoring requirements contained in
NPDES permit. Facilities must submit at least 12 or more sampling results for effluent parameters to
be considered for reduction or elimination. The Division will review these sampling results and make a
determination concurrent with the request.
1617 Mail Service Center, Raleigh, North Carolina 27699-1617
Location: 512 N. Salisbury St. Raleigh, North Carolina 27604 One
Phone: [phone] FAX: [phone] Customer Service:1-877-623-6748 NorthCarohna
Internet: v,+ww.ncwaterquality.org IV
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An Equal Opportunity 1 Affirmative Action Employer L "

If any parts, measurement frequencies or sampling requirements contained in this _permit are unacceptable to
you, you have the right to an adjudicatory hearing upon written request within thirty (30) days following receipt
of this letter. This request must be in the form of a written petition, conforming to Chapter 150E of the North
Carolina General Statutes, and filed with the Office of Administrative Hearings (6714 Mail Service Center,
Raleigh, North Carolina 27699-6714). Unless such demand is made, this decision shall be final and binding.
Please note that this permit is not transferable except after notice to the Division. The Division may require
modification or revocation and reissuance of the permit. This permit does not affect the legal requirements to
obtain other permits which may be required by the Division of Water Quality or permits required by the Division
of Land Resources, the Coastal Area Management Act or any other Federal or Local governmental permit that
may be required. If you have any questions concerning this permit, please contact Bob Guerra at telephone
number [phone].
Sincerely,
I
, Coleen H. Sullins
y C
Enclosure: NPDES Permit NCO079821
cc: Winston-Salem Regional Office / Surface Water Protection
NPDES Unit
Central Files
Aquatic Toxicology Section (emailed)
1617 Mail Service Center, Raleigh, North Carolina 27699-1617
Location: 512 N. Salisbury St. Raleigh, North Carolina 27604
Phone: [phone] \ FAX: [phone] \ Customer Service: 1877-623-6748 NorthCarollna
Internet wwa.noxaterqualtive Action
a'ry F�Ha //y
An Equal OpporNnity lAftirmalive Action Employer `VK6 ` "

Permit NCO079821
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES
DIVISION OF WATER QUALITY
PERMIT
TO DISCHARGE WASTEWATER UNDER THE
NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM
In compliance with the provision of North Carolina General Statute 143-215.1, other lawful
standards and regulations promulgated and adopted by the North Carolina Environmental
Management Commission, and the Federal Water Pollution Control Act, as amended,
City of Winston-Salem / Forsyth County Utilities
is hereby authorized to discharge wastewater from a facility located at the
R. A. Thomas Water Treatment Plant (WTP)
1201 South Martin Luther King, Jr. Drive
Winston-Salem
Forsyth County
to receiving waters designated as an Unnamed Tributary to Salem Creek in the
Yadkin -Pee Dee River Basin
in accordance with effluent limitations, monitoring requirements, and other
conditions set forth in Parts I, II, III and IV hereof.
This permit shall become effective September 1, 2009.
This permit and authorization to discharge shall expire at midnight on June 30,
2014.
Signed this day July 17, 2009.
ileen H. Sullins, Director
ion of Water Quality
By Authority of the Environmental Management Commission

Permit NCO079821
SUPPLEMENT TO PERMIT COVER SHEET
All previous NPDES Permits issued to this facility, whether for operation or
discharge are hereby revoked. As of this permit issuance, any previously issued
permit bearing this number is no longer effective. Therefore, the exclusive authority
to operate and discharge from this facility arises under the permit conditions,
requirements, terms, and provisions included herein.
Winston-Salem / Forsyth County Utilities is hereby authorized to:
1. Continue to operate a conventional water treatment plant discharging filter -
backwash wastewater. This facility is at the R. A. Thomas WTP, located at
1201 South Martin Luther King, Jr. Drive near Winston-Salem, in Forsyth
County.
2 Discharge from said treatment works at the location specified on the
attached map into an Unnamed tributary to Salem Creek, classified as C
waters in the Yadkin -Pee Dee River Basin.

r
Permit NCO079821
A. (1.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS
During the period beginning on the effective date of this permit and lasting until expiration, the
Permittee is authorized to discharge filter backwash from outfall 001. Such discharges shall be
limited and monitored by the Permittee as specified below:
EFFLUENT
CHARACTERISTICS
LIMITS
MONITORING REQUIREMENTS
Monthly
Averse
Daily Maximum
Measurement
FregRency
Sample
Type
Sample
Location
Flow
25.0 MGD
Continuous
Recording
Effluent
TSS
30.0 m /L 1
45.0 m /L
Weeklv I
Grab
Effluent
H
6.0 - 9.0
s.u.
Weekly
Grab
Effluent
Total Residual
Chlorinel•2
28.0 µg/L
Weekly
Grab
Effluent
Total Copper
2/Month
Grab
Effluent
Total Iron
2/Month
Grab
Effluent
Fluoride3
2/Month
Grab
Effluent
Total Zinc4
2/Month
Grab
Effluent
Total Phosphorus
Quarterly
Grab
Effluent
Total Nitrogen (TN)
Quarterly
Grab
Effluent
Aluminum5
Quarterly
Grab
Effluent
Calcium5
Quarterly
Grab
Effluent
Magnesium5
Quarterly
Grab
Effluent
Mananese5
Quarterly
Grab
Effluent
Ammonia Nitro ens
Quafterly
Grab
Effluent
Whole Effluent
ToxicityMonitorin 7
Quarterly
Qua
Grab
Effluent
Footnotes:
1. Limit and monitor only if the facility adds chlorine to water that is eventually discharged.
2. The Division shall consider all effluent TRC values reported below 50 ug/l to be in compliance
with the permit. However, the Permittee shall continue to record and submit all values reported
by a North Carolina certified laboratory (including field certified), even if these values fall below 50
ug/l.
3. Fluoride monitoring applies if the facility backwashes with fluoridated, finished water.
4. Zinc should only be monitored if a Permittee uses zinc orthophosphate as a corrosion inhibitor.
5. Parameters should be monitored in conjunction with toxicity test.
6. Facilities using chloramination will be required to monitor ammonia nitrogen on a quarterly
basis. Ammonia Nitrogen monitoring only applies if the facility chloraminates.
7. See Attachment A (2.).
All samples collected should be from a representative discharge event.
There shall be no discharge of floating solids or visible foam in other than trace
amounts.

Permit NCO079821
A. (2.) CHRONIC TOXICITY MONITORING (ORTRLY)
The permittee shall conduct quarterly chronic toxicity tests using test procedures outlined in the "North
Carolina Ceriodaphnia Chronic Effluent Bioassay Procedure," Revised February 1998, or subsequent
versions.
The effluent concentration defined as treatment two in the procedure document is 90%. The testing shall be
performed as a Ceriodaphnia dubia 7day pass/fail test. The tests will be performed during the months of
January, April, July and October. Effluent sampling for this testing shall be performed at the NPDES
Permitted final effluent discharge below all treatment processes.
All toxicity testing results required as part of this permit condition will be entered on the Effluent Discharge
Monitoring Form (MR-1) for the month in which it was performed, using the parameter code TGP3B.
Additionally, DWQ Form AT-1 (original) is to be sent to the following address:
Attention: North Carolina Division of Water Quality
Environmental Sciences Section
1621 Mail Service Center
Raleigh, N.C. 27699-1621
Completed Aquatic Toxicity Test Forms shall be filed with the Environmental Sciences Section no
later than 30 days after the end of the reporting period for which the report is made.
Test data shall be complete and accurate and include all supporting chemical/physical measurements performed
in association with the toxicity tests, as well as all dose/response data. Total residual chlorine of the effluent
toxicity sample must be measured and reported if chlorine is employed for disinfection of the waste stream.
Should there be no discharge of flow from the facility during a month in which toxicity monitoring is required, the
permittee will complete the information located at the top of the aquatic toxicity (AT) test form indicating the
facility name, permit number, pipe number, county, and the month/year of the report with the notation of "No
Flow" in the comment area of the form. The report shall be submitted to the Environmental Sciences Section at
the address cited above.
Should the permittee fail to monitor during a month in which toxicity monitoring is required, then monthly
monitoring will begin immediately. Upon submission of a valid test, this monthly test requirement will revert to
quarterly in the months specified above.
Should any test data from this monitoring requirement or tests performed by the North Carolina Division of Water
Quality indicate potential impacts to the receiving stream, this permit may be re -opened and modified to include
alternate monitoring requirements or limits.
If the Permittee monitors any pollutant more frequently then required by this permit, the results of such
monitoring shall be included in the calculation & reporting of the data submitted on the DMR & all AT Forms
submitted.
NOTE: Failure to achieve test conditions as specified in the cited document, such as minimum control
organism survival, minimum control organism reproduction, and appropriate environmental controls,
shall constitute an invalid test and will require immediate follow-up testing to be completed no later than
the last day of the month following the month of the initial monitoring.

REASONABLE POTENTIAL ANALYSIS
Iron
Date
Data
BDL=112DL
Results
1 10/22/2007
0.1
0.1
Std Dev.
0.1997
210/2912007
0.1
0.1
Mean
0.1673
311/5/2007
0.1
0.1
C.V.
1.1934
4 11/12/2007
0.1
0.1
n
48
511/19/2007
0.2
0.2
6 11/26/2007
0.2
0.2
Mull Factor =
2.5400
7 12/3/2007
0.1
0.1
Max. Value
1.4 mg/L
8 12/10/2007
0.3
0.3
Max. Fred Cw
3.5 mg/L
912117/2007
0.5
0.5
10 12/26/2007
0.2
0.2
1112131/2007
0.3
0.3
12 1/7/2008
13 1/14/2008
0.1
0.1
14 1/23/2008
0.2
0.2
15 1/28/2008
0.1
0.1
16 2/4/2008
0.1
0.1
17 2/11/2008
0.1
0.1
18 2/18/2008
0.1
0.1
19 2/25/2008
0.2
0.2
20 3/3/2008
0.2
0.2
21 3/10/2008
0.1
0.1
22 3/17/2008
0.1
0.1
23 3/24/2008
0.2
0.2
24 3/31/2008
0.2
0.2
2541712008
0.3
0.3
26 4/14/2008
0.1
0.1
27 4/21/2008
0.3
0.3
28 4/28/2008
0.2
0.2
29 5/5/2008
0.1
0.1
30 5/12/2008
0.1
0.1
315119/2008
0.1
0.1
32 5/28/2008
0.1
0.1
33 6/2/2008
0.1
0.1
3461912008
0.2
0.2
35 6/16/2008
0.1
0.1
36 6/23/2008
0.2
0.2
37 6/30/2008
38 7/7/2008
0.1
0.1
39 7/14/2008
0.1
0.1
40 7/21/2008
1.4
1.4
41 7/28/2008
0.1
0.1
42 8/4/2008
0.1
0.1
43 8/11/2008
0.1
0.1
44 8/18/2008
0.1
0.1
45 8/25/2008
0.1
0.1
46 9/3/2008
0.1
0.1
47 9/8/2008
0.1
0.1
48 9/15/2008
0.1
0.1
49 9/22/2008
0.2
0.2
50 9/29/2008
0.3
0.3
51
52
53
64
65
56
57
58
59
60
199
200
npdes rpa 200403(5-13-08)1. data
1 - 7/13/2009

REASONABLE POTENTIAL ANALYSIS
R A Thomas WTP
NCO079821
Time Period
0
Ow (MGD)
25
7010S (cfs)
4.3
701OW (ds)
0
3002 (cfs)
0
Avg. Stream Flow, QA (cfs)
0
Rec'v tg Stream Salem Creek
WWTP Class
1WC (%) @ 7Q10S 00.012
@ 7010W N/A
@ 30Q2 NIA
@ QA NIA
Stream Class C
Outfall 001
Qw = 25 MGD
STANDARDS &
PARAMETER
TYPE
CRITERIA (2)
POL
Units
REASONABLE POTENTIAL RESULTS
RECOMMENDED ACTION
NCWQS1 XFAVI
n 004 InPadCr ACow"Crr
n1
Chmak Aarh
Acute: NIA
Iron
NC
1
mg/L
48 48
3.5
Acute: NIA
0 0
NIA
Chronlc: error /g� Type
—•—•---------•—•—•---•------
Acute: NIA
0 0
WA
_ _
Chronl crrorr�Type
•--------^----•—•^—•—•—•— —
Acute: NIA
0 0
NIA
I--
—•—•---•—•—•—•------
Chrorsi—
Acute: NIA
0 0
NIA
_
Chsonic::rror@-
— — — --- — — --- —_— — — - ^
Acute: NIA
0 0
NIA
Chronic ErtOr Q Type
—•-----------•---------•—•—. ^
Acute: NIA
0 0
NIA
_
Chronl Error @ Type
----------------^--- --^-
-- — —
Acute: NIA
0 0
NIA
Ch_
ronic: rra®Type-
----.^.-----------_^.^w^_^
Acute: WA
0 0
NIA
_
Chronic: Brror®Type—._.---
—---.—_--- _.—.-----
Acute: WA
0 0
WA
Chronlc::rror�Type—.—.^•^•^.^
—_^.—•—•^•^•—•— —
Acute: WA
Acute: WA
0 0
NIA
.— •—•-----_—_—_ _•^
Acute: WA
0 0
NIA
Chronic: :mor@Type—
•-----•—•------- ---
- — — — —
Acute: WA
Chronic: Hrrorl� Type
Ague: WA
0 0
WA
Chronic :rror�T-ype—•— ----^------^-------- — —
• Legend. " Freshwater Discharge
C 2 Carcinogenic
NC o Nan -Carcinogenic
A = Aesthetic
npdesrpa 200403(5-13-08)1.rpa
7/13/2009

Table 1. Project Information Table 2. Parameters of Concern
Facility Name
WWTP Grade
NPDES Permit
Outfall
Flow, Qw (MGD)
Receiving Stream
Stream Class
7Q10s (cfs)
7Q10w (cfs)
30Q2 (cfs)
QA (cfs)
Time Period
Data Source(s)
R A Thomas WTP
I
NC0079821
001
25.0
Salem Creek
C
4.3
Name Type Chronic Modifier Acute PQL Units
Par01 Iron NC 1 mg/L
Par02
Par03
Par04
Par05
Par06
Par07
Par08
Par09
Par10
Par11
Par12
Par13
Par14
Par15
npdes rpa 200403(5-13-08)1, input
7/13/2009

jateWinsrton-Salem •Forsyth County
/county Utilities
•Sewer •Solid Waste Disposal
Utilities Administration • P.O. Box 2511 • Winston-Salem, NC 27102 • Tel [phone] • Fax [phone]
June 6, 2009
Mr. Bob Guerra
Water Quality Section
NPDES Unit, Western Program
1617 Mail Service Center
Raleigh, NC 27699-1617
Re: Thomas WTP NPDES
Permit # NCO079821
RECEIVED
DENR - WATER QUALITY
Dear Mr. Guerra, POINT SOURCE BRANCH
In response to your letter dated May 20, 2009 containing a draft permit for NPDES Permit
#NC0079821 I would like to request the following modifications. With each request is a -^n
justification.
1. We request a monthly average of25.0 MGD as opposed to 18.0 MGD as listed in the draft.
2. We request that the sampling frequency for iron be reduced to once per month based on the
availability of historical data.
3. We request that ammonia nitrogen be eliminated from our sampling requirements. This
facility does not disinfect by chloramination, therefore we feel sampling for this parameter is
unnecessary. We request that Footnote #6 reads as follows: "Ammonia nitrogen monitoring
only applies if the facility chloraminates".
ME,
4. As per your conversation with our Water Treatment Superintendent, Bill Brewer, on May 29,
2009 please remove the facility restart notification A. (3). As a condition of start-up of the
renovated Thomas Plant, NC DENR Division of Public Water Supply will require us to filter
the plant to waste to prove treatability. We are concerned the facility restart notification and
requirements will be in conflict with the plant start-up requirements of NC DENR's Public
Water Supply.
5. Please see the attached photo. The current coordinates listed for the discharge point are 36' De
05' 13"N latitude and 80n 12'50"W longitude. According to Google Earth the actual location
of the discharge is at 360 5'13.16"N latitude and 80°13'5.40"W longitude.
Thank you in advance for your consideration of these requests. Should you have questions
regarding this matter or require additional information, I can be reached at [phone] to
answer your questions.
Page 1 of 3

Sincer y,
David K. SOtilities
Director of
Cc: Rose Pruitt, NCDENR-Division of Water Quality
Ron Hargrove, Deputy Director of Utilities
Bill Brewer, Water Treatment Superintendent
Kenny Atkins, Thomas Water Plant NPDES, ORC
Page 2 of 3

Winston-Salem Journal
Advertising Affidavit
Winston-Salem Journal
P.O Box 3159
Winston-Salem, NC 27102
NCDENRIDWQ/POINT SOURCE BRANCH
ATTN: DINA SPRINKLE
1617 MAIL SERVICE CENTER
RALEIGH, NC 27699-1617
Account Number
3376309
Date
May 22, 2009
Date Category Description Ad Size Total Cost
05/22/2009 Legal Notices PUBLIC NOTICE North Carolina Environment 2 x 63 L 433.75
PUBLIC NOTICE
North Carolina Errvlrommundel
Management CommissbNNPDFS Unit
1617 Mail Servlce Carder
mists NC 27699-1617
Notice Interdta LLwea
NPDES Wntamlar permit
The North Carolina Environmental Management
Commission proposem Issue a NPOES wastewater
rg dischae Permlitt ttoothe person(s) Ilsted below.
Written comments nparding the proposed germlt
will be ac ,ad until 3D days after the publish data
of this nMke. The Director of the NC Division of
Water ouality (DWI) may hold a public hearing
should tdh�ere be a (DWI)
degree of publle In-
terest Please mall comments entl/or IntormMlan
requests to yyowe at the above address. Interested
pSheeLSRalelppklNC to
revkw Inmatlon Salisbury
Additional IMemotion on NPDES permits and this
notice may be found on our website: www.ncwater
qualityar9, or by calling (919) e07-6304.
PPG Industries Aber chose Produces. Irc requested
renewal of Permit NC000W26 for Lexington Plent In
Davidson CourrtY. this hcllily discharge Is treated
Industrial wastewater to North Potts Crack
The City of Wlmbm6eMm requested renewal of
permit NCOo66011 for the Nellson WTP In Forsyth
Counry. This permitted discharge Is treated niter.
backwuh wastewater to an unnamed tributary to
Muddy Creek In the Yadkin -Pee Dee River Basin.
The Clly o/ wlrramn•SaMm re�eshd rcnewel of
permit CW19621 for the RA mas WTP In For•
syM County. This permitted discharge Is 1reMed
er-backwash wastewater to Salem Creek in the
Yatlkln-Pee Dee River Bnsln.
The City of Whodoneaalem requested renewal of
permit NCDDS0342 for Muddy Crack WW7P In For.
svD� County; this facll discharge Is treated mu-
Icl al wastewater to akin River, Yadkin RHer
am n.
The C j M Wlnsbn-Salem requested renewal of
permit =3704 for Archie Elledge W W7P In For.
y, this County, facility discharge Is treated mu-
n d mI wastewater to Salem Creek. Yadkin River
me n.
tits Town of BoarWlk has requested renewal M
ermh County. This for the Boonvllk: WWTP In
permitted discharge Is treated
domestic wastewater to the Tanyard Crack In the
Yadkin Pee -Dee Rlwr Basin.
W61: May 22. 20a9
Media General Operations, Inc.
Publisher of the
Winston-Salem Journal
Forsyth County
Before the undersigned, a Notary Public of Forsyth County, North Carolina, duly
commissioned, qualified, and authorized by law to administer oaths, personally appeared
D.H. Stanfield, who by being duly sworn deposes and says: that he is Controller of the
Winston-Salem Journal, engaged in the publishing of a newspaper known as Winston-Salem
Journal, published, issued and entered as second class mail in the City of Winston-Salem, in
said County and State: that he is authorized to make this affidavit and sworn statement: that
the notice or other legal advertisement, a true Copy of which is attached hereto, was
published in the Winston-Salem Journal on the following dates:
05/22/2009
and that the said newspaper in which such notice, paper document, or legal advertisement
was published was, at the time of each and every such publication, a newspaper meeting all
the requirements and qualifications of Section 1-597 of the General Statutes of North
Carolina and was a qualified newspaper within the meaning of Section 1-597 of the General
Statutes of North Carolina. t,
This 22th day of May, 2009 kA � ` „
(signature ojpersoh maki g Idavio
Sworn to and subscribed before me, this 22th day of May, 2009
KIMALEY JOHNSON
C NOTARY PUBLIC
My Commission expires . o b 2-010 FORSYTH COUNTY
STATE OF NORTH CAR L I
MY COMMISSION EXPIRE -
THIS IS NOT A BILL. PLEASE PAY FROM INVOICE. THANK YOU

Winston-Salem • Forsyth County
City/County Utilities
Water • Sewer • Solid Waste Disposal
Utilities Administration • BO. Box 2511 • Winston-Salem, NC 27102 • Tel [phone] • Fax [phone]
November 26, 2008
Mrs. Dina Sprinkle RECEIVED
NC DENR/Water Quality/Point Source Branch
1617 Mail Service Center
Raleigh, NC 27699-1617
Re: Renewal Notice
NPDES Permit #NC0079821
R.A. Thomas WTP DENR - WATER OUALITY
Forsyth County POINT SOURCE BRANCH
Dear Mrs. Sprinkle,
The City of Winston-Salem formally requests renewal ofNPDES Permit #NC0079821 at
our R.A. Thomas Water Treatment Plant. As requested and required this letter serves as
notification of our intention to renew this permit.
On October 20, 2008 the Thomas WTP stopped operation and Pizzagalli Construction
Company began demolition of the existing plant. This renovation project is scheduled to
be completed by December 2012 at which time the plant will be put back into service.
The attached plant diagram represents the renovated facilities. In addition, 1 have
attached an aerial photo of the Thomas Plant as it existed in October 2008 before
demolition of the plant commenced. We wish to renew this permit even though we will
not have a discharge at this outfall until the plant returns to service. Our current plan is to
handle the residuals generated by the facility in the same manner as outlined by the
correspondence with the State dated November 1, 1978.
Should you have any questions regarding this matter please feel free to call me at (336)
727-8418.
Director of Utilities

Salem, N1— 17107.
a
m�
36'05'09.05" to
II 001
Image 02006 DI911alGlobe
Google
32008Tele Alias
blev 2796 Jam 22. 2008 Evealt 21641t

\ ` ' —, / olpl

R.A. Thomas Water Treatment Plant
Water System Facility ID = TP1
Production Capacity = 18.0 MGD
City of Winston-Salem
NPDES ID# = NCO079821
Potassium
Permanganate MO MGD
w
lionr Common Header
Alum
Caustic 04
Chlorine 10
Chlorine
Filter Aid Polymer
Chlorine
Fluoride
Ortho-Phosphate
Caustic
Entry Point-EP1
4f
Coagulation
Flocculation
Sedimentation Basins
Filtration
din River via Neilson
WTP Raw Water
Reserviors
(2) 1.76 MG Residuals
Lagoons
Residuals Residuals Pump
Station
(3) 200 GPM Pumps
v
ro
-a
w
eY
Polymer
Washwater
��r tc'lJasic
EQ Basin
0.55 MG
WjxPcw=45MGEY
1.5 MG
Clearwell
1.5 MG
Clearwell
2a J MGC
Distribution
Washwater
Clarifier
a5MUD —�
Discharge Outfall 001

Thomas Water Treatment Plant Solids Handling Plan
The Thomas Water Treatment Plant is an 18 MGD water treatment facility. Solids are generated
by automatic sludge removal from sedimentation basins, backwashing filters, and filter -to -waste
after filter backwashes are completed. Solids produced from filter backwashes and filter -to -waste
is routed to an equalization basin (0.545 MG), is treated with polymer, and then pumped to a
clarifier. Solids settled in the clarifier flow to the plants waste station and are then pumped to
one of two residuals lagoons (1.76 MG each) using one of three 0.288 MGD pumps. One lagoon
is kept in service while the second is dried and cleaned. Clarified water from the clarifier is
discharged to an unnamed tributary of Salem Creek through the permitted NPDES discharge
NCO079821.
Permits and Classifications:
1. The discharge from the clarifier is authorized by NPDES Permit NCO079821. The
classification for the discharge is Grade I Physical/Chemical.
Operation:
1. The system consists of a 0.545 MG equalization basin (EQ basin), (4) equalization basin
discharge pumps rated at 1.0 MGD each, a residuals clarifier rated at maximum weir loading
rate of 7.24 gpm/ft, a residuals pump station with (3) residuals pumps rated at 0.29 MGD
each for transferring residuals to (2) residuals lagoons rated at 1.76 MG each.
2. Backwash and filter to waste water from the plant process are sent to the EQ basin and then
pumped by the EQ basin pumps to the washwater clarifier. Prior to the wastewater clarifier,
the wastewater is treated with polymer to aid in clarification.
3. All sedimentation basin blow down residuals and residuals from the washwater clarifier flow
directly to the residuals pump station and are then pumped directly to one of the two
residuals lagoons.
4. Clarified water from the washwater clarifier is discharged to an unnamed tributary of Salem
Creek through the permitted NPDES discharge NCO079821.
5. Residuals are removed from the lagoons and hauled to an application site adjacent to the
plant by a private contractor.
6. Once the sludge has dried it is spread and a grass cover planted to stabilize the area.
Application Requirements:
1. Bulk residuals are not applied under the following conditions:
i. If the residuals are likely to adversely affect a threatened or endangered species.
ii. If the application causes prolonged nuisance conditions.
iii. If the land fails to assimilate the bulk residuals or the application causes the
contravention of surface water or groundwater standards.
Thomas Water Treatment Plant
Solids Handling Plan
Revised 12/11/2008

iv. If the land is flooded, frozen, or snow-covered or is otherwise in a condition such that
runoff of the residuals would occur.
v. During a precipitation event or within 24 hours following a rainfall event of 0.5 inches
or greater in a 24-hour period.
vi. For residuals treatment and storage facilities, the following minimum setbacks shall be
adhered to:
Description of Setback
Minimum Setback
feet
Habitable residence or place of public assembly under separate ownership or
not to be maintained as part of the project site
100
Property lines
50
Private or public water supply
100
Surface waters (streams, -intermittent and perennial, perennial water bodies,
and wetlands)
50
Wells with exception to monitoring wells
100
2. When land applying bulk residuals to application site, the following minimum setbacks are
maintained at all times:
Setback By Type of
Residual feet
Description of Setback
Liquid
Cake
Private or public water sup2ly
100
100
Surface waters (streams -intermittent and perennial,
perennial water bodies, and wetlands)
100
25
Surface water diversions (ephemeral streams,
waterways, ditches)
25
0
Groundwater lowering ditches (where bottom of
The ditch intersects SHWT)
25
0
Subsurface groundwater lowering system
Wells with exception to monitoring wells
100
100
Bedrock outcrops
25
0
3. Specific bulk residuals land application area boundaries are clearly marked on each land
application site prior to and during a residuals land application event.
Spills and Noncompliance Notification:
1. The Winston-Salem Regional Office, telephone number [phone] will be notified
within 24 hours or the next working day following the occurrence or first knowledge of the
occurrence of any of the following:
i. Any occurrence with the distribution program which results in the land application of
significant amounts of wastes which are abnormal in quantity or characteristic.
Thomas Water Treatment Plant
Solids Handling Plan
Revised 12/11/2008
2

ii. Any failure of the distribution program resulting in a release of materials to receiving
waters.
iii. Any process unit failure, due to known or unknown reasons, that render the facility
incapable of adequate residual treatment.
2. Persons reporting such occurrences by telephone shall also file a written report in letter form
within (5) days following first knowledge of the occurrence. This report must outline the
actions taken or proposed to be taken to ensure that the problem does not recur.
3. Emergency Contacts: Thomas Water Treatment Plant [phone]
Kenny Atkins, Plant Supervisor [phone]
[phone]
Thomas Water Treatment Plant
Solids Handling Plan
Revised 12/11/2008
Bill Brewer, Water Treatment Supt. [phone]
[phone]
Winston-Salem/Forsyth County [phone]
Utility Administration
DEHNR Regional Office [phone]
General Emergency 911
HazMat
3

FACT SHEET FOR EXPEDITED PERMIT RENEWALS
Basic Information to determine potential for expedited.permit renewal
Reviewer/Date
- O
Permit Number
Facility Name
-SA IZM toLt1T
Basin Name/Sub-basin number
3 -00
Receiving Stream
CAw
Stream Classification in Permit
Does permit need NH3 limits?
Does permit need TRC limits?
Does permit have toxicity testing?
'
Does permit have Special Conditions?
Does permit have instream monitoring?
Is the stream impaired (on 303(d) list)?
Any obvious compliance concerns?
Any permit mods since lastpermit?
Existing expiration date6-30-047
New expiration date
- 3 - /
N to
Miscellaneous Comments
YES v--' This is a SIMPLE EXPEDITED permit renewal (administrative
renewal with no changes, or only minor changes such as TRC, NH3,
name/ownership changes). Include conventional WTPs in this group.
YES This is a MORE COMPLEX EXPEDITED permit renewal (includes
Special Conditions (such as EAA, Wastewater Management Plan), 303(d)
listed, toxicity testing, instream monitoring, compliance concerns, phased
limits). Basin Coordinator to make case -by -case decision.
YES_ This permit CANNOT BE EXPEDITED for one of the following reasons:
• Major Facility (municipal/industrial)
• Minor Municipals with pretreatment program
• Minor Industrials subject to Fed Effluent Guidelines (lb/day limits for BOD, TSS,
etc)
• Limits based on reasonable potential analysis (metals, GW remediation organics)
• Permitted flow > 0.5 MGD (requires full Fact Sheet)
• Permits determined by Basin Coordinator to be outside expedited process
TB Version 8/18/2006 (NPDES Sdrver/Current Versions/Expedited Fact Sheet)