NC0024945_Authorization to Construct_20050602

NPDES DOCUHENT SCANNING: COVER SHEET
NC0024945
Irwin Creek WWTP
NPDES Permit:
Document Type:
Permit Issuance
Wasteload Allocation
Authorization to Construct (AtC)--
Permit Modification
Complete File - Historical
Engineering Alternatives (EAA)
Correspondence
Owner Name Change
Draft Permit
Instream Assessment (67b)
Speculative Limits
Environmental Assessment (EA)
Document Date:
June 2, 2005
This document is printed on paper - igriore any
content on the re'reriae scide

Charlotte -Mecklenburg Utilities
Irwin Creek WWTP
Permit No. NC0024945
ENGINEER'S CERTIFICATION
FOR
CONSTRUCTION OF WASTEWATER TREATMENT FACILITIES
I, To5kVvPr µ • N oR-TON , am a duly registered Professional Engineer
(please print)
in the State of North Carolina and have been authorized to observe (circle one: full-time, weekly,
Crperiodicall) the construction of the subject project for the Permittee:
Project No.: 024945A01
Project: UV Disinfection System
Location: Irwin Creek WWTP
Charlotte, North Carolina
Mecklenburg County
The project consists of:
• construction of a 30 MGD (peak flow) open channel, low-pressure ultraviolet (UV)
disinfection system;
• removal of the temporary UV system bypass valve and plugging of the adjacent tees;
• decommissioning of the existing gaseous chlorine disinfection system;
• installation of a 300 KW diesel -powered generator and standby power
system; and
• construction or installation of all related structures, equipment, piping, controls, and other
appurtenances, as presented in the proposed plans and specifications.
I hereby certify that I did regularly observe this project with due care and diligence and that the
construction was completed in substantial conformance with the Authorization to Construct and
with the approved plans and specifications.
Signature
Date Jvu1= Z, 200r Registration No. 2 6 .17/00
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Upon completion of construction and prior to operation of the modified facility, the Permittee shall provide the Division with a
certification 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.
The Certification should be submitted to:
NCDENR/DWQ. NPDES Unit, 1617 Mail Service Center, Raleigh. North Carolina 27699-1617

CDM
330 East Coffee Street
Greenville, South Carolina 29601
tel: [phone]
fax: [phone]
October 12, 2005
NCDENR/DWQ
NPDES Unit
1617 Mail Service Center
Raleigh, NC 27699-1617
OCT 1 7 2005
Subject: Engineer's Certification for Construction of Wastewater Treatment Facilities
Project No. 024937A01 — UV Disinfection Facilities at the Sugar Creek WWTP
Project No. 024945A01 — UV Disinfection Facilities at the Irwin Creek WWTP
Dear NCDENR/DQW NPDES Unit:
Please find attached the Engineer's certification forms for the construction of UV disinfection
facilities at the Sugar Creek WWTP and Irwin Creek WWTP as referenced in the above subject
line. Both wastewater treatment plants are owned and operated by Charlotte -Mecklenburg
Utilities and are located in Charlotte, NC within Mecklenburg County. As indicated on the
attached forms, construction of the permitted facilities has been completed in substantial
conformance with the Authorization to Construct permit.
Please do not hesitate to contact me if you have any questions or need any additional
information.
Very truly yours,
Joshua M. Norton, P.E.
Senior Project Manager
Camp Dresser & McKee
c: Julie McLelland, Charlotte -Mecklenburg Utilities
Leslie Samel, CDM
Project File 2940
Z:IUV Disinfection -Sugar & Irwin\Construction\Correspondence110122005 NCDENR Engineers Certification Itr.doc
consulting • engineering • construction • operations

Michael F. Easley, Govemor
State of North Carolina
William G. Ross, Jr., Secretary
Department of Environment and Natural Resources
Alan W. Klimek, P.E., Director
Division of Water Quality
July 15, 2003
Ms. Julie McLelland
Charlotte -Mecklenburg Utilities
5100 Brookshire Boulevard
Charlotte, North Carolina 28216
UV Disinfection System
Subject: Authorization to Construct Permits
ATC Nos. 024937A01 and 024945A01
Sugar Creek and Irwin Creek WWTPs
Mecklenburg County
Dear Ms. McLelland:
The Division of Water Quality's NPDES Unit has reviewed the Charlotte -Mecklenburg Utilities'
request for Authorization to Construct permits for improvements at the Sugar Creek and Irwin
Creek WWTPs. We have also reviewed additional information provided by Camp Dresser & McKee
on the Utilities' behalf. The Division finds the proposed improvements and design to be satisfactory
and hereby grants authorization for the following:
Sugar Creek WWTP (ATC No. 024937A01)
• construction of a 40 MGD (peak flow) open channel, low-pressure ultraviolet (UV) disinfection
system;
• construction of a sodium hypochlorite disinfection system for on -site water reuse;
• decommissioning of the existing gaseous chlorine disinfection system; and
• construction or installation of all related structures, equipment, piping, controls, and other
appurtenances, as presented in the proposed plans and specifications.
Irwin Creek WWTP (ATC No. 024945A01)
• construction of a 30 MGD (peak flow) open channel, low-pressure ultraviolet (UV) disinfection
system;
• decommissioning of the existing gaseous chlorine disinfection system;
• installation of a trailer -mounted 300 KW diesel -powered generator and standby power system;
and
• construction or installation of all related structures, equipment, piping, controls, and other
appurtenances, as presented in the proposed plans and specifications.
These Authorization to Construct permits are issued in accordance with Part III, Paragraph A of
NPDES Permit Nos. NC0024937 and NC0024945, both issued October 4,1996, and shall be subject to
revocation unless the wastewater treatment facilities are constructed in accordance with the
conditions and limitations specified in the applicable NPDES and ATC permits.
North Carolina Division of Water Quality [phone] NCDENR
1617 Mail Service Center FAX [phone] Customer Service
Raleigh, North Carolina 27699-1617 On the Internet at http://h2o.enr.state.nc.us/ 1 800623-7748

ATC No. 024937A01 and 024945A01
Sugar Creek and Irwin Creek WWTPs
Upon completion of construction and submittal of an acceptable Engineer's Certification for each
project (see below), the approved design capacity (average design flow) shall remain at 20.0 MGD
for the Sugar Creek WWTP and 15.0 MGD for the Irwin Creek WWTP.
Special Provisions
These Authorization to Construct permits are conditioned upon compliance with the following:
• The UV system bypass valve at each facility will be removed and the adjacent tees plugged
after acceptance of the UV system and decommissioning of the chlorine disinfection systems.
Removal of the bypasses will be verified in the Engineer's Certification for each project.
• Both facilities are hydraulically limited; at present, peak flows cannot exceed 40 MGD at the
Sugar Creek WWTP and 30 MGD at the Irwin Creek WWTP. If actual daily flows exceed these
values or if Charlotte -Mecklenburg Utilities proposes to remove bottlenecking in one or both
facilities, the design of the UV systems must be re-evaluated and, if necessary, modified to
accommodate the increased peak flows.
• The trailer -mounted generator at the Irwin Creek WWTP will be dedicated to the new UV
system until it is replaced by a permanent unit as part of a plant -wide generator system
upgrade.
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.
Notification Requirements
The Permittee shall notify the Mooresville Regional Office, telephone number [phone], at least
forty-eight (48) hours in advance of operation of the installed facilities, so that an in -place inspection
can be made. Such notification to the regional supervisor shall be made during the normal office
hours of 8:00 a.m. until 5:00 p.m. on Monday through Friday, excluding State Holidays.
Engineering Certification
Upon completion of construction and prior to operation of each modified facility, the Permittee shall
provide the Division with a certification from a professional engineer registered in North Carolina
certifying that the permitted facility has been installed in accordance with the NPDES Permit, this
Authorization to Construct, and the approved plans and specifications. The certification should be
mailed to the NPDES Unit, 1617 Mail Service Center, Raleigh, North Carolina 27699-1617.
ORC Requirements
The Permittee must continue to employ a certified wastewater treatment plant operator 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 Title
15A, Chapter 8G, .0200. 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; and must properly
manage and document daily operation and maintenance of the facility and comply with all other
conditions of Title 15A, Chapter 8G, .0200.

ATC No. 024937A01 and 024945A01
Sugar Creek and Irwin Creek WWTPs
Additional Conditions
The Operational Agreement between the Permittee and the Environmental Management
Commission is incorporated herein by reference and is a condition of these ATC permits.
Noncompliance with the terms of the Operational Agreement shall subject the Permittee to all
sanctions provided by G. S. 143-215.6 for violation of or failure to act in accordance with the terms
and conditions of this Permit.
Failure to abide by the requirements contained in these Authorization to Construct permits 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 these Authorization to Construct permits does not relieve the Permittee from its
responsibility to comply with any and all statutes, rules, regulations, or ordinances that may be
imposed by other government agencies (local, state, and federal) which have jurisdiction.
The Permittee shall maintain a copy of the approved plans and specifications on file for the life of
the facilities.
If you have any questions about these Authorization to Construct permits, please contact Mike
Templeton, at [phone], extension 541, or by e-mail at [e-mail].
Sincerely,
Alan W. Klimek, P.E.
Director
Enclosures: Engineer's Certification Forms
Copies: Ms. Leslie Samel (w/ enclosure) - Camp, Dresser & McKee
301 South McDowell Street
Charlotte, NC 28204
Mooresville Regional Office, Water Quality
Technical Assistance and Certification Unit
Central Files
NPDES Unit Files