NC0050342_Authorization to Construct_20170829

Water Resources
ENVIRONMENTAL QUALITY
August 29, 2017
Ms. Courtney Driver
Utilities Director
Winston-Salem/Forsyth County Utilities Commission
101 N. Main Street, Suite 357, City Hall
Winston-Salem, North Carolina 27101
Dear Ms. Driver:
ROY COOPER
Govenior
MICHAEL S. REGAN
Secretary
S. JAY ZIMMERMAN
Director
SUBJECT: Authorization to Construct
A to C No. 050342A06
Winston-Salem/Forsyth County Utility
Commission
Muddy Creek WWTP
A letter of request for an Authorization to Construct was received June 15, 2017, by the
Division of Water Resources (Division), and final plans and specifications for the subject project have
been reviewed and found to be satisfactory. Authorization is hereby granted for the construction of
modifications to the existing 21 MGD Muddy Creek WWTP, with discharge of treated wastewater into
the Yadkin River and Muddy Creek in the Yadkin -Pee Dee River Basin.
This authorization results in no increase in design or permitted capacity and is awarded for the
construction of the following specific modifications:
Replacement of the existing RICE blowers with five (5) 300 HP turbo blower units
rated for 3,790 scfin each with AFD, piping and controls; upgrade of the aeration
system to facilitate automatic zone DO control; replacement of the existing plunger
pumps with two (2) 170 GPM at 110 R TDH progressive cavity thickened WAS pumps
with AFD, piping and controls; installation of a new polymer feed system with 330
gallons storage tote, pallet containment, mixer, blender, piping and controls; removal
of ferric chloride addition system; removal of digester dewatering pumps; removal of
caustic storage and chemical feed system; in conformity with the project plans,
specifications, and other supporting documentation comprising the ATC Permit
Application package submitted to the Department of Environmental Quality.
In addition to the appropriate construction items approved in this Authorization to
Construct, the following work scope items stated in the application were deemed as
maintenance events and require no approval:
• In-kind replacement of fine pore diffused aeration system diffuser membranes
• New electrical room within the existing blower building and Thickening building.
• In-kind replacement of thickener mechanism in the existing gravity thickener basin
• In-kind replacement six (6) sludge recirculation and six (6) sludge transfer pumps.
• Re -tubing of existing primary heat exchangers
State of North Carolina I Environmental Quality I Water Resources
512 N. Salisbury Street 11612 Mail service Center I Raleigh, North Carolina 27699-1612
Phone: [phone]

Ms. Courtney Driver, Utilities Director
August 29, 2017
Page 2 of 3
• Upgrade to the existing boiler controls and fire trains
• In-kind replacement of two (2) plant hot water loop pumps and three (3) digester
hot water loop pumps
• New compressed air system for pneumatic valve actuators
• Rehabilitation of the existing standby generator radiator
• Replacement of existing pressure/vacuum relief valves and flame arrestors on the
digester covers
• Miscellaneous building improvements and associated sitework and electrical work
This ATC is issued in accordance with Part III, Paragraph A of NPDES Permit No. NC0050342
issued effective September 1, 2017, and shall be subject to revocation unless the wastewater treatment
facilities are constructed in accordance with the conditions and limitations specified in Permit No.
NC0050342.
It is the Owner's responsibility to ensure that the as -constructed project meets the requirements
of all applicable regulations and statutes, the ATC Permit Application package, and all of the
requirements contained herein. Failure to comply may result in penalties in accordance with North
Carolina General Statute § 143-215.6A through § 143-215.6C.
The sludge generated from these treatment facilities must be disposed of in accordance with
G.S. 143-215.1 and in a manner approved by the Division.
In the event that the facilities fail to perform satisfactorily, including the creation of nuisance
conditions, the Permittee shall take immediate corrective action, including those as may be required
by the Division, such as the construction of additional or replacement wastewater treatment or disposal
facilities.
The Winston-Salem Regional Office, telephone number 336-776-9800, shall be notified at
least forty-eight (48) hours in advance of operation of the installed facilities so that an on site inspection
can be made. Such notification to the regional supervisor shall be made during the normal office hours
from 8:00 a.m. until 5:00 p.m. on Monday through Friday, excluding State Holidays.
Upon completion of construction and prior to operation of this permitted facility, a certification
must be received from a Professional Engineer certifying that the permitted facility has been installed
in accordance with the NPDES Permit and the ATC Permit Application package. Mail the
Certification to: Division of Water Resources, WQ Permitting — NPDES, 1617 Mail Service Center,
Raleigh, NC 27699-1617.
Upon classification of the facility by the Certification Commission, the Permittee shall employ
a certified wastewater treatment plant operator to be in responsible charge (ORC) of the wastewater
treatment facilities. The operator must hold a certificate of the type and grade at least equivalent to or
greater than the classification assigned to the wastewater treatment facilities by the Certification
Commission.
The Permittee must also employ a certified back-up operator of the appropriate type and grade
to comply with the conditions of T15A:8G.0202. The ORC of the facility must visit each Class I
facility at least weekly and each Class I1, III and IV facility at least daily, excluding weekends and

Ms. Courtney Driver, Utilities Director
August 29, 2017
Page 3 of 3
holidays, must properly manage the facility, must document daily operation and maintenance of the
facility, and must comply with all other conditions of T I 5A: 8G.0202.
A copy of the project plans and specifications shall be maintained on file by the Permittee
for the life of the facility.
During the construction of the proposed additions/modifications, the Permittee shall continue
to properly maintain and operate the existing wastewater treatment facilities at all times, and in such
a manner, as necessary to comply with the effluent limits specified in the NPDES Permit.
You are reminded that it is mandatory for the project to be constructed in accordance with the
North Carolina Sedimentation Pollution Control Act, and when applicable, the North Carolina Dam
Safety Act. In addition, the specifications must clearly state what the contractor's responsibilities shall
be in complying with these Acts.
Prior to entering into contract(s) for construction, the recipient must have obtained all
applicable permits from the State.
The issuance of this ATC does not preclude the Permittee from complying with any and all
statutes, rules, regulations, or ordinances which may be imposed by other government agencies (local,
state, and federal) which have jurisdiction.
If you have any questions or need additional information, please contact Trupti Desai at
telephone number [phone].
Sincerely,
V. Jay Zimmerman, P.G.
Director, Division of Water Resources
With Engineer's Certificate attached:
cc: DWR Winston-Salem Regional Office, Water Quality Programs
Central Files
e -copy: Joseph R. Shy, P.E.
Black & Veatch International Company
Email: [e-mail]
NPDES File
Without Engineer's Certificate attached:
cc: Forsyth County Health
DWI/Ken Pohlig

Winston-Salem/Forsyth County Utilities Commission
Muddy Creek WWTP
Authorization to Construct No. 050342A06
Issued: August 29, 2017
Engineer's Certification
1, . as a duly registered Professional Engineer in
the State of North Carolina, having been authorized to observe (periodically/weekly/full time)
the construction of the modifications and improvements to the Muddy Creek Wastewater
Treatment Plant, located in Forsyth County, hereby state that, to the best of my abilities, due
care and diligence was used in the observation of the following construction:
Replacement of the existing RICE blowers with five (5) 300 HP turbo blower
units rated for 3,790 scfin each with AFD, piping and controls; upgrade of the
aeration system to facilitate automatic zone DO control; replacement of the
existing plunger pumps with two (2) 170 GPM at 110 ft TDH progressive cavity
thickened WAS pumps with AFD, piping and controls; installation of a new
polymer feed system with 330 gallons storage tote, pallet containment, mixer,
blender, piping and controls; removal of ferric chloride addition system; removal
of digester dewatering pumps; removal of caustic storage and chemical feed
system; in conformity with the project plans, specifications, and other supporting
documentation comprising the ATC Permit Application package submitted to the
Department of Environmental Quality.
I certify that the construction of the above referenced project was observed to be built within
substantial compliance, intent and in conformity with all applicable regulations and statutes and
the project plans, specifications, and other supporting documentation comprising the
Authorization to Construct Permit Application package.
Signature
Date
Registration No.
Mail this Certification to: Attn: Trupti Desai
Complex Permitting Unit
DEQ/DWR/Water Quality Programs
1617 Mail Service Center
Raleigh, NC 27699-1617