NC0026051_Authorization to Construct_20180321

ROY COOPER
Governor
` MICHAEL S REGAN
secretory
M LINDA CULPEPPER
Water Resources fnte,nn Director
ENVIRONMENTAL QUALITY
March 21, 2018
Ms. Stephanie Brixey
Interim Deputy Director/POTW Director
Durham County
5926 Highway 55 East
Durham,North Carolina 27713
SUBJECT: Authorization to Construct
A to C No. 026051A03
Durham County
Triangle WWTP
NPDES Permit No. NC0026051
Dear Ms. Brixey:
A letter of request for an Authorization to Construct was received January 30,2018 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 12 MGD Triangle WWTP, with discharge of treated
wastewater into the Northeast Creek in the Cape Fear 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 existing four(4) 75 HP brush aerators in BNR Train No.2 with
two (2)membrane disc diffuser systems and two (2) 125 HP rotary lobe blowers
with VFD and minimum flow capacity of 1500 SCFM each at 9.2 psi,piping and
controls; 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,all other items stated in the application were deemed as maintenance events and require
no approval.
This ATC is issued in accordance with Part III, Paragraph A of NPDES Permit No.
NC00026051 issued effective December 1, 2011 and shall be subject to revocation unless the
wastewater treatment facilities are constructed in accordance with the conditions and limitations
specified in Permit No. NC0026051.
State of North Carolma I Environmental Quality I Water Resources
512 N Salisbury Street 11617 Mail service Center I Raleigh,North Carolina 27699-1617
Phone [phone]

Ms. Stepheme Brixey,Interim Deputy Director ,
March 21, 2018
Page 2 of 3
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 Raleigh Regional Office, telephone number 919-791-4200, 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 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 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.

Ms. Stepheme Brixey, Intenm Deputy Director
March 21, 2018
Page 3 of 3
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.
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(919) 807-6351.
Sincerely,
P.,(1),\) e_eivj
i4-1,Linda Culpepper
Interim Director, Division of Water Resources
With Engineer's Certificate attached:
cc: DWR Raleigh Regional Office, Water Quality Programs
Central Files
ecopy: Mr. Kurtis B. Proffit, P.E.
Black &Veatch International Corporation
Email: [e-mail]
NPDES File
Without Engineer's Certificate attached:
cc: Durham County Health

Durham County
Triangle Wastewater Treatment Plant
Authorization to Construct No. 026051 A03
March 21, 2018
NPDES Permit No.NC0026051
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 Triangle Wastewater Treatment
Plant, located in Durham 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 existing four (4) 75 HP brush aerators in BNR Train No.2 with
two (2) membrane disc diffuser systems and two (2) 125 HP rotary lobe blowers
with VFD and minimum flow capacity of 1500 SCFM each at 9.2 psi, piping and
controls; 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 Registration No.
Date
Mail this Certification to: Attn: Trupti Desai
Complex Permitting Unit
DEQ/DWR/Water Quality Programs
I)
1617 Mail Service Center
Raleigh,NC 27699-1617