NC0047597_Authorization to Construct_20161205

�p0
Water Resources
ENVIRONMENTAL QUALITY
December 5, 2016
. V&. Don Greeley, Director
City of Durham
101 City Hall Plaza
Durham, North Carolina 27701
Dear Mr. Greeley:
PAT MCCRORY
Cmvemor
DONALD R. VAN DER VAART
Secrer(py
S. JAY ZIMMERMAN
SUBJECr: Authorization to.Construct
A to C No. 047597A02
City of Durham
South Durham WRF
Director
A Permit Application package for an Authorization to, Construct (ATC) Permit was
received November 30,2016i by the Division of Water -Resources (Division).
This Authorization to Construct Permit is issued based solely upon the North
Carolina Licensed Professional Engineer's certification and the Applicant's certification of
the ATC Permit Application package. The Division has waived the technical review of the
plans, specifications, calculations and other supporting documentation included in the
subject ATC Permit Application package. Note that the ATC Permit Application package
may be subject to a Division audit.
This ATC results in no increase in design or permitted capacity of the existing 20.0 MGD
South Durham Water Reclamation Facility and is hereby issued for the construction of the
following specific modifications:
Three (3) new 25 MGD peak flow mechanical band screens, three (3) new 25 MGD peak
flow grit removal units, four (4) 300 GPM grit pumps, one (1) new odor control biofilter,
one (1) new 1.7 MG equalization tank, fine bubble diffuser modifications, 19 new aeration
basin influent mixers (1.5 HP each), one (1) new 160 -foot diameter with 18 -foot side water
depth secondary clarifier, one (1) 150 GPM scum pump, one (1) new RAS pump station
with dual 8,500 GPM RAS pumps, three (3) 225 GPM WAS pumps, one (1) new UV
disinfection system consisting of four channels with three banks each in series rated for
12 MGD per bank, three (3) new. 650 GPM reclaimed water pumps, new solids polymer
feed facilities, three (3) new electrical buildings, and associated major electrical
improvements; in conformity with the project plans, specifications, and other supporting
documentation comprising the ATC Permit Application package submitted to the
Department of Environmental Quality.
This ATC is issued in accordance with Part III, Paragraph A of NPDES' Permit No.
NCO047597 issued effective February 1, 2013, and shall be subject to revocation unless the
State of North Caroline I Environmental Quality I Water Resources
1617 Mail service Center I Raleigh, North Carolina 27699-1617
Location: 512 N. Salisbury SL Raleigh, North Carolina 27604, Archdale Building 9th Floor
Phone: [phone] / Fax: [phone]

Mr. Don Greeley, Director -
December 5, 2016
Page 2 of 3
wastewater treatment facilities are constructed in accordance with the conditions and limitations
specified in Permit No. NC0047597.
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 Statutes § 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 91.9-791-4200, 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.

-:_ T
Mr. Don Greeley,Toirect6ir
December 5, 2016
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 Ron Berry at
telephone number [phone].
Sincerely,
-S.-Jay Zimmerman
Director, Division of Water Resources
With Engineer's Certificate attached:
cc: Patricia Drummey Siegel, P.E., Hazen & Sawyer
DWR Raleigh Regional Office, Water Quality Programs
Michelle McKay, E.I.
Ron Berry
Central Files
NPDES File

City of Durham
South Durham WRF
Authorization to Construct No. 047597A02
Issued December 5, 2016
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 South Durham Water Reclamation
facility, 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:
Three (3) new 25 MGD peak flow mechanical band screens, three (3) new 25 MGD peak
flow grit removal units, four (4) 300 GPM grit pumps, one (1) new odor control biofilter,
one (1) new 1.7 MG equalization tank, fine bubble diffuser modifications, 19 new
aeration basin influent mixers (1.5 HP each), one (1) new 160 -foot diameter with 18 -foot
side -water -depth secondary -clarifiers -one (1)-150 GP -M scum pump, one-(1)-new--RAS--
pump station with dual 8,500 GPM RAS pumps, three (3) 225 GPM WAS pumps, one
(1) new UV disinfection system consisting of four channels with three banks each in
series rated for 12 MGD per bank, three (3) new 650 GPM reclaimed water pumps, new
solids polymer feed facilities, three (3) new electrical buildings, and associated major
electrical improvements
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
Mail this Certification to: Attn: Ron Berry
Complex Permitting Unit
DEQ/DWR/Water Quality Programs
1617 Mail Service Center
Raleigh, NC 27699-1617