NC0050342_authorization to construct_20120430

ATA
NCDENR
North Carolina Department of Environment and Natural Resources
Division of Water Quality
Beverly Eaves Perdue Charles Wakild, P.E. Dee Freeman
Governor Director Secretary
April 30, 2012
Mr. David K. Saunders, P.E.
City of Winston-Salem
Post Office Box 2511
Winston-Salem, North Carolina 27102
SUBJECT: Authorization to Construct
A to C No. 050342A04
City of Winston-Salem
Muddy Creek WWTP
Dear Mr. Saunders:
A letter of request for an Authorization to Construct was received March 21, 2012, by the
Division of Water Quality (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 21.0 MGD Wastewater Treatment Plant, with
discharge of treated wastewater into the Yadkin River (outfall 001) and Muddy Creek (outfall
002) 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:
The replacement of travelling bridges with eight (8) chain -and -flight mechanisms
in the primary clarifiers; replacement of four (4) 165 gpm primary sludge pumps
with new 165 gpm primary sludge pumps and one 165 gpm spare pump;
replacement of the existing scum handling equipment with new scum separation
equipment, including a new 320 gpm pump, a spare 320 gpm pump and a new
900 gallon scum separation tank; installation of one new 125-ft diameter
secondary clarifier with 17-ft sidewater depth; modification of the existing
clarifier distribution structure to eliminate a wet well and directly connect
clarifiers to the RAS pumps; installation of a new 300 gpm WRAS sludge pump
and flow meter; maintenance and rehabilitation of the four (4) existing clarifiers,
in conformity with the project plans, specifications, and other supporting data
subsequently filed and approved by the Department of Environment and Natural
Resources.
1617 Mail Service Center, Raleigh, North Carolina 27699-1617
Location: 512 N. Salisbury St. Raleigh, North Carolina 27604
Phone: [phone] i FAX: [phone]
Internet: www.ncwaterouality.orq
An Equal Opportunity 1 Affirmative Action Employer
One
NorthCarolina
Naturally

Mr. David K. Saunders, P.E.
April 30, 2012
Page 2
This Authorization to Construct is issued in accordance with Part III, Paragraph A of
NPDES Permit No. NC0050342 issued July 24, 2009, 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.
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 [phone], 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, this Authorization to Construct and the
approved plans and specifications. Mail the Certification to: Infrastructure Finance Section,
DWQ/DENR, 1633 Mail Service Center, Raleigh, NC 27699-1633.
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 II, III and IV facility at least daily, excluding
weekends and holidays, must properly manage the facility, must document daily operation and
maintenance of the facility, and must comply with all other conditions of T15A:8G.0202.
A copy of the approved 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,

Mr. David K. Saunders, P.E.
April 30, 2012
Page 3
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 any contract(s) for construction, the recipient must have obtained all
applicable permits from the State.
Failure to abide by the requirements contained in this Authorization to Construct may
subject the Permittee to an enforcement action by the Division in accordance with North
Carolina General Statute 143-215.6A to 143-215.6C.
The issuance of this Authorization to Construct 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.
One (1) set of approved plans and specifications is being forwarded to you. If you have
any questions or need additional information, please contact Seth Robertson, P.E. at telephone
number [phone].
Sincerely,
Charles Wakild, P.E.
MM:sr
cc: Michael D. Parker, P.E. - Hazen and Sawyer
Forsyth County Health Department
DWQ Winston-Salem Regional Office, Surface Water Protection
Technical Assistance and Certification Unit
Point Source Branch, NPDES Program
Michelle McKay, E.I.
ATC File

City of Winston-Salem
A To C No. 050342A04
Issued April 30, 2012
Engineer's Certification
I, , 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 WWTP, located on
Cooper Road in Forsyth County for the City of Winston-Salem, hereby state that, to the best of
my abilities, due care and diligence was used in the observation of the following construction:
The replacement of travelling bridges with eight (8) chain -and -flight mechanisms
in the primary clarifiers; replacement of four (4) 165 gpm primary sludge pumps
with new 165 gpm primary sludge pumps and one 165 gpm spare pump;
replacement of the existing scum handling equipment with new scum separation
equipment, including a new 320 gpm pump, a spare 320 gpm pump and a new
900 gallon scum separation tank; installation of one new 125-ft diameter
secondary clarifier with 17-ft sidewater depth; modification of the existing
clarifier distribution structure to eliminate a wet well and directly connect
clarifiers to the RAS pumps; installation of a new 300 gpm WRAS sludge pump
and flow meter; maintenance and rehabilitation of the four (4) existing clarifiers,
in conformity with the project plans, specifications, and other supporting data
subsequently filed and approved by the Department of Environment and Natural
Resources.
I certify that the construction of the above referenced project was observed to be built within
substantial compliance and intent of the approved plans and specifications.
Signature Registration No.
Date
Mail this Certification to:
Attn: Michelle McKay, E.I.
Infrastructure Finance Section
DENR/DWQ
1633 Mail Service Center
Raleigh, NC 27699-1633