NC0020591_Application (ATC)_20110502

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NCDENR
North Carolina Department of Environment and Natural Resources
Division of Water Quality
Beverly Eaves Perdue Coleen H. Sullins Dee Freeman
Governor Director Secretary
May 2, 2011
Mr. Larry Pressley, P.E., Assistant City Manager
City of Statesville
Post Office Box 1111
Statesville, North Carolina 28677
SUBJECT: Authorization to Construct
A to C No. 020591 A02
City of Statesville
Third Creek WWTP
Iredell County
Project No. CS370395-03
Dear Mr. Pressley:
A letter of request for an Authorization to Construct was received January 28, 2011, 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 4.0 MGD Wastewater Treatment Plant, with
discharge of treated wastewater into Third Creek in the Yadkin-Pee Dee River Basin.
This authorization results in an increase in design and permitted capacity to 8.0 MGD,
and is awarded for the construction of the following specific modifications:
Installation of two (2)mechanical bar screens each rated for a peak flow of 22.5
MGD; an influent pump station with six(6) 3,500 gpm pumps; a dual chamber
grit removal system each chamber rated for 12.0 MGD peak flow and each
containing a 250 gpm self priming grit pump; an aerobic reactor distribution box;
a 7.3 MG three (3) train oxidation ditch biological nutrient removal treatment
system consisting of nine (9)anaerobic basins each equipped with one 3 hp mixer,
three (3)anoxic basins each equipped with one 10 hp mixer, three (3)oxidation
ditches each equipped with two (2) 125 hp surface aerators; a new RAS/WAS
pump station with four(4)3,133 gpm RAS pumps and three (2) 540 WAS pumps;
three (3) 110 ft diameter clarifiers; a 234,000 gallon chlorine disinfection and
dechlorination system; a 94,787 gallon post aeration basin with two (2) 15 hp
floating surface aerators; the addition of three (3) 25 hp floating surface aerators
in the existing aerobic digester; conversion of an existing aeration basin to an
aerobic digester including six(6) 60 hp mixers, 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 One
Location:512 N.Salisbury St.Raleigh,North Carolina 27604 NorthCarolina
Phone:[phone] FAX:[phone] Customer Service:1-877-623-6748 yrn//
Internet:www.ncwaterqualiV.org �atu`elf`�/
An Equal Opportunity 1 Affirmative Action Employer f/

Mr. Larry Pressley, P.E., Assistant City Manager
May 2, 2011
Page 2
This Authorization to Construct is issued in accordance with Part III, Paragraph A of
NPDES Permit No. NC0020591 issued date April 26, 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. NC0020591.
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 Mooresville Regional Office, telephone number(704) 663-1699, 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: Construction Grants& Loans,
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,
and in such a manner, as necessary to comply with the effluent limits specified in the NPDES
Permit.

1
Mr. Larry Pressley, P.E., Assistant City Manager
May 2, 2011
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 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(919) 715-6206.
Sincerely,
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P/
Coleen H. Sullins
MM:sr
cc: Doug Chapman, P.E. -McGill Associates, P.A.DWQ
Iredell County Health Department
DWQ Mooresville Regional Office, Surface Water Protection
Technical Assistance and Certification Unit
Point Source Branch,NPDES Program
Michelle McKay, E.I.
SRF File