NC0020389_Authorization to Construct_20060926

Mr. Keith Langdon, Town Manager
Town of Benson
P.O. Box 69
Benson, North Carolina 27504
Michael F. Easley, Governor
William G. Ross Jr., Secretary
North Carolina Department of Environment and Natural Resources
Alan W. Klimek, P.E. Director
Division of Water Quality
September 26, 2006
SUBJECT: Authorization to Construct
A to C No. 020389A01
Town of Benson
Benson WWTP
Johnston County
Project No. E-SRL-T-05-0070
Dear Mr. Langdon:
A letter of request for Authorization to Construct was received on October 19, 2005, by
the 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 1.5 MGD Town of Benson Wastewater Treatment Plant, with discharge of treated
wastewater into the Hannah Creek in the Neuse River Basin.
This authorization results in an increase in design and permitted capacity to 1.9 MGD,
and is awarded for the construction of the following specific modifications:
Replacement of two existing screw pumps, each having a capacity of 1,750 gpm;
replacement of 15 HP motors, gear drive assemblies, and associated
appurtenances to upgrade 8 existing brush rotor aerators in the oxidation ditches;
the addition of two new 15 HP brush rotors in the oxidation ditches; a new 50-
foot diameter secondary clarifier; replacement of three existing filter influent lift
pumps, each having a capacity of 1,710 gpm; rehabilitation of the existing tertiary
filters, improvements of the existing chlorination/dechlorination unit; all
associated site work, electrical work, yard piping, and appurtenances, pursuant to
the application received on October 17, 2005, and in conformity with the project
plan, specifications, and other supporting data subsequently filed and approved by
the Department of Environment and Natural Resources.
This Authorization to Construct is issued in accordance with Part III, Paragraph A of
NPDES Permit No. NC0020389 issued January 20, 2006, and shall be subject to revocation
unless the wastewater treatment facilities are constructed in accordance with the conditions and
limitations specified in Permit No. NC0020389.
Nye hCarolina
,Naturally
North Carolina Division of Water Quality 1617 Mail Service Center Raleigh, NC 27699-1617 Phone [phone] Customer Service
Internet: www.ncwatereuality.orq 512 N. Salisbury St. Raleigh, NC 27604 FAX [phone]
An Equal Opportunity/Affirmative Action Employer — 50% Recycled/10% Post Consumer Paper

1
Mr. Keith Langdon, Town Manager
September 26, 2006
Page 2
This Authorization To Construct is issued pursuant to 15A NCAC 02T. 0105(n), for the
construction of a reclaimed water utilization facility without flow equalization at the site of the
Town of Benson WWTP. In the event that non-compliance with any condition or limitation
contained in Permit No. WQ0022501 results from the absence of flow equalization, the Town's
NPDES permit may be administratively reopened, and a requirement for the construction of a
flow equalization basin may be incorporated into the permit.
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 North Carolina Division of Water Quality.
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 this Division, such as the construction of additional or replacement wastewater
treatment or disposal facilities.
The Raleigh 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 Cecil G. Madden, Jr., P.E.,
Construction Grants & Loans, DWQ / DENR, 1633 Mail Service Center, Raleigh, NC 27699-
1633.
Upon classification of the wastewater treatment and irrigation facilities by the Water
Pollution Control System Operators Certification Commission (WPCSOCC), the Permittee shall
designate and employ a certified operator to be in responsible charge (ORC) and one or more
certified operator(s) to be back-up ORC(s) of the facilities in accordance with 15A NCAC 8G
.0201. The ORC shall visit the facilities in accordance with 15A NCAC 8G .0204 or as specified
in this permit and shall comply with all other conditions specified in these rules.
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,
and in such a manner, as necessary to comply with the effluent limits specified in the NPDES
Permit.

Mr. Keith Langdon, Town Manager
September 26, 2006
Page 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.
Failure to abide by the requirements contained in this Authorization to Construct may
subject the Permittee to an enforcement action by the Division of Water Quality 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 Cecil G. Madden, Jr., P.E. at
telephone number [phone].
Sincerely,
ID:cgm
cc: Charles Davis, P.E., The Wooten Company
Johnston County Health Department
DWQ Raleigh Regional Office, Surface Water Protection
Technical Assistance and Certification Unit
Daniel Blaisdell, P.E.
Point Source Branch, NPDES Program
Cecil G. Madden, Jr., P.E.
Ishwar Devkota, P.E.
SRL File

OCT-31-2008 16:16 FROM:THE WOOTEN COMPANY 919 8343589
T0:9198076495 P.2/2
Town o1. Benson
A To C No. 020389A01
Issued September 26, 200E
Engineer's Certification
i, ►4(�eN y1 6B j t, - . , as a duly registered Professional Engineer in
tiie State of 'North Caroline; leaving been authorized to observe (periodically/weekly/full time)
the constriction of the modifications and improvements to the Benson W WTP, located on 770
Hannah Creek Road in Johnston County for the Town of Benson, hereby state that, tc) the best of
my abilities, due care and diligence was used in the observation of the following construction:
Replacement of two existing screw pumps, each having a capacity of 1,750 gpm;
replacement of 15 HY motors, gear drive assemblies, and associated
appurtenances to upgrade 8 existing bnish rotor aerators in the oxidation ditches;
the addition of two new 15 1-1P brush rotors in the oxidation ditches; a new 50-
foot diameter secondary clarifier; replacement of three existing filter influent lift
pumps, each having a capacity of 1,710 gpm: rehabilitation of the existing tertiary
filters, improvements of the existing ehIorination eehlorination unit: all
associated site work, electrical work, yard piping, and appurtenances, in
conformity with the project plan, specifications, and other supporting data
subsequently filed and approved by (he 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.
We understand that the new limits associated with the modifications to expand to 1.9 MOD now
apply.
Signature
Date c3
Send to:
Registration No._ / / 7 5 7
Construction (hunts & Loans
DENRiDWQ •
163.3 Mail Service Center
Raleigh, NC' 27699-1633