NC0036277_Authorization to Construct_20001013

NPDES DOCUMENT SCANNING COVER SHEET
NPDES Permit:
NCO036277
McDowell Creek WWTP
Document Type:
Permit Issuance
Wasteload Allocation
Authorization to Construct
(AtC)
Permit Modification
Complete File - Historical
Engineering Alternatives (EAA)
Correspondence
Instream Assessment (67b)
Speculative Limits
Environmental Assessment (EA)
Document Date:
October 13, 2000
This document is printed on x-exxse paper - ignore axxy
content on tlxe x-eirerse side

4TC)
State of North Carolina
Department of Environment
and Natural Resources
Division of Water Quality
James B. Hunt, Jr., Governor
Bill Holman, Secretary
Kerr T. Stevens, Director
Mr. Douglas Bean, Director
Charlotte - Mecklenburg Utilities
5100 Brookshire Boulevard
Charlotte, North Carolina 28216
Dear Mr. Bean:
A-0
MOM
led ft;lk
NCDENR
NORTH CAROLINA DEPARTMENT OF
ENVIRONMENT AND NATURAL RESOURCES
October 13, 2000
Subject: Authorization to Construct Permit Issuance
ATC Number 036277 ACC
McDowell Creek WWTP/ CMU
NPDES Permit NCO036277
Mecklenburg County . +
A letter of request for an Authorization to Construct (ATC) was received May 9, 2000, by the
Division and final plans and specifications for this project have been reviewed and found to be
satisfactory. Authorization is hereby granted for the addition of solids handling and process
improvements at the McDowell Creek WWTP 6.0 MGD wastewater treatment facility discharging into
McDowell Creek in the Catawba River Basin. This ATC provides for no additional capacity at the plant
and the design flow shall remain at 6 MGD. Specifically, this ATC allows the installation of:
• Additional mechanical bar screen (1 inch spacing, 17.6 MGD hydraulic capacity) and relocation
of the existing one to the headworks bypass channel ,
• New adjustable frequency drive influent pump (3150 gpm at 112 ft. head),
• Effluent trough covers over final clarifiers (to assist with inhibition of algal growth),
• Filter media and underdrains in existing (unused) filter no. 5 (9.5' x 53', rated for 1.7 gpm
design flow,
• Activation of 3rd ultraviolet disinfection channel (to accommodate peak flows of 18 mgd) with
the addition 6 new modules (40 lamps/module), and the addition of 3 new modules in the
existing 2 UV channels,
• Modification of the existing digester configuration to convert the existing batch operation to a
continuous process; installation of a concrete cover on digester no. 4 and installation of gas
holder cover on digester no. 3; installation of spiral heat exchangers for each digester;
installation of new boilers; replacement of existing sludge recirculation pumps and installation
of in -line grinders; installation of new digested sludge pumps (and in -line grinder) to direct
sludge to belt filter presses,
• Polymer feed system for sludge conditioning (rated at 2.7-27 gph) - proportional feed rate,
• 2 belt filter presses and appurtenances, for sludge dewatering (2 m width, rated at 300 - 1000
lb/m*hr),
• Concrete biosolids storage area with cover,
1617 MAIL SERVICE CENTER, RALE.IGFI, NORTH CAROLINA 27699-1617 - TELEPHONE [phone]/FAX [phone]
AN EQUAL Cry ORTUNIrr AFFIRMATIVL ACTION EMPLOYER - 50% RECYCLES)/ lU% POST -CONSUMER PAPER
VISir US ON THE WEB Ar http://h2o.enr.state.nc.us/NPDES

Mr. Douglas Bean
CMU - McDowell Creek
Page 2 of 4
• Filtrate equalization pumping station (3 submersible pumps, rated at 500 gpm and 64' head)
and filtrate metering vault, and
all additional piping, valves, control equipment and appurtenances.
Once construction under this ATC has been completed and an Engineer's Certificate has been
submitted, the permittee is authorized to operate the modified and/or additional units.
This Authorization to Construct is issued in accordance with NPDES Permit No.
NC0036277issued October 2, 1995 (and currently up for renewal), and shall be subject to revocation
unless the wastewater treatment facilities are constructed in accordance with the conditions and
limitations specified in 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 Mooresville 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 in -place 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 classification of the facility by the Certification Commission, the Permittee shall employ a
certified water pollution control treatment system operator to be in responsible charge (ORC) of the
water pollution control treatment system. The operator must hold a certificate of the type and grade at
least equivalent to or greater than the classification assigned to the water pollution control treatment
system 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, .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, and must properly manage and document daily
operation and maintenance of the facility and must comply with all other conditions outlined in Title
15A, Chapter 8G, .0204. Once the facility is classified, the Permittee must submit a letter to the
Certification Commission which designates the operator in responsible charge within: (A) Sixty
calendar days prior to wastewater being introduced into a new system or (B) within 120 calendar days
of the following, (i) after receiving notification of a change in the classification of the system requiring
the designation of a new ORC and back-up ORC or (ii) a vacancy in the position of ORC or back-up
ORC.
A copy of the approved plans and specifications shall be maintained on file by the Permittee for
the life of the facility.
The Operational Agreement between the Permittee and the Environmental Management
Commission is incorporated herein by reference and is a condition of this Permit. 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 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.

Mr. Douglas Bean
CMU - McDowell Creek
Page 3 of 4
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.
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 the NPDES Unit, Division of Water Quality, 1617 Mail Service
Center, Raleigh, NC 27699-1617,
One (1) set of approved plans and specifications is being forwarded to you. If you have any
questions or need additional information, please contact Ms. Susan A, Wilson, telephone number (919)
733-5083, extension 510.
Sincerely,
C Kerr T. Stevens
cc: Central Files
NPDES Unit, Permit File
Mooresville Regional Office, Water Quality
Technical Assistance and Certification, Tony Arnold
David M. Parker, P.E. Black & Veatch
8604 Cliff Cameron Drive, Suite 164
Charlotte, NC 28269
Mecklenburg County Health Department

To: Permits and Engineering Unit
Water Quality Section
ATTN: Ghristi�mi YV
Date: August 17, 2000
AUTHORIZATION TO CONSTRUCT
NPDES PERMIT
STAFF REPORT AND RECOMMENDATIONS
I�rl
County: Mecklenburg
Permit No. AC036277ACC
MRO # 00-60
PART I- GENERAL INFORMATION
I'.
1. Facility and Address: Charlotte -Mecklenburg Utility Dept.
McDowell Creek WWTP
5100 Brookshire Boulevard
Charlotte, North Carolina 28216
2. Date of On -Site Investigation (if conducted): 06-19-2000
3. Report Prepared By: Samar Bou-Ghazale, Env. Engineer I
AUG 2 2 2000 i
D'.NR - N ?LR '"';u'
POINT SOURCC BRA,sCH
4. Persons Contacted and Telephone Number: Mr. Jerome Lucky, ORC; Ms. Maggie
Becker, Black & Veatch, Tel# [phone].
Directions to Site: From the intersection of SR 2128 (Beatties Ford Road) and SR 2074
(Neck Road), travel west on SR 2074 approximately 1.9 miles. The WWTP is located
on the right side of SR 2074 after crossing McDowell Creek.
6. Verified Discharge Point(s), List for All Discharge Points:
Latitude: 35°22'52" Longitude: 80°56'25"
USGS Quad No.: F 15 NW USGS Quad Name: Lake Norman South, N.C.
7. Site size and expansion are consistent with application?
Yes_X_ No_ If No, Explain: N/A
8. Topography (relationship to flood plain included): Moderately sloping, the WWTP is not
in a flood plain.
9. Location of Nearest Dwelling: None within 1000 feet.

PART II - DESCRIPTION OF DISCHARGE AND TREATMENT WORKS
Type of Existing Treatment Facility:
Please provide a description of existing or substantially constructed wastewater treatment
facilities: The existing W WT facilities consist of two mechanical bar screens, grit
removal, influent pumping, three (3) primary clarifiers, two parallel BNR systems
consisting of Oxic/Anoxic zones, two (2) final clarifiers, four (4) tertiary filters, 4
anaerobic sludge digesters, and ultra -violet disinfection.
2. Please provide a description of proposed wastewater treatment facilities: The proposed
wastewater treatment facilities will consist of the following additions: Two belt filter
presses, a polymer feed system, dewatered sludge conveyor, a filtrate equalization
pumping station, and a biosolids storage basin; Ar&robic digester improvements and
miscellaneous improvements to the headworks structure, influent pumping station, final
clarifiers, effluent filters and UV disinfection system.
3. Sludge Handling and Disposal Scheme:
a. If residuals are being land applied, please specify DWQ Permit No.: WQ0000057
Residuals Contractor: BioGro, Inc., telephone No.: [phone]
4. Treatment Plant Classification (attached completed rating sheet): Class IV
5. SIC Code(s): 4952
Wastewater Code(s):01
Main Treatment Unit Code: 11503
PART III - EVALUATION AND RECOMMENDATIONS
The permittee, Charlotte -Mecklenburg Utility Department, has applied for an
Authorization to Construct as described above.
Pending final review and concurrence by the State Review Group, it is recommended that
the authorization to construct be issued.
y
Signature of Report P"r oer
Water Quality Re ' nal Supervisor
'9/ L�'> b
Date

a
BLACK & VEATCH
8604 Cliff Cameron Drive, Suite 164
Charlotte, North Carolina 28269 USA
Tel: [phone]
Fax: [phone]
Charlotte -Mecklenburg Utilities
McDowell Creek Wastewater Treatment Plant
Phase III Improvements
Contract 2
Mr. David A. Goodrich
NPDES Supervisor
North Carolina Department of Environment
and Natural Resources
Division of Water Quality
512 North Salisbury Street
Raleigh, North Carolina 27604
Subject:
Dear Mr. Goodrich:
Black & Veatch International Company
B&V Project 62254.500
B&V File A
May 8, 2000
MAY - 9 2000
1Pr1 NR - WATFR-D.!,�l �..
cn ,
Authorization to Construct Request
NPDES Permit No. NC0036277
McDowell Creek WWTP
Mecklenburg County
On behalf of Charlotte -Mecklenburg Utilities, we are requesting an Authorization to Construct
for Contract 2 of the Phase III Improvements at the McDowell Creek Wastewater Treatment
Plant. Enclosed are two copies of the plans and specifications for this project. By copy of this
letter, a third copy of the plans and specifications is being forwarded to Rex Gleason in the
Mooresville office for his review
This project is the second of two projects to construct solids handling and processing
improvements for this facility. The first project, Contract 1, was reviewed and an Authorization
to Construct was issued on February 24, 2000. Mark McIntire reviewed the Contract 1
submittal, and is requested to review this project as well.
Contract 2 of the Phase III Improvements includes the following work:
New biosolids dewatering building, with two belt filter presses, polymer feed system,
and related equipment.
New biosolids storage facility, for short-term storage of dewatered biosolids. The
ultimate disposal of biosolids is with land application.,
Anaerobic digester improvements, including the addition of one anaerobic digester,
new sludge heating equipment, a new secondary digester with floating gasholder
cover, and automated control of sludge feed.
the imagine -build company-

Mr. David A. Goodrich
Page 2
B&V Project 62254.500
May 8, 2000
Miscellaneous other plant improvements, including addition of a new mechanical bar
screen and conveyor in the headworks, replacement of one influent pump in the
influent pumping station, installation of filter internals (underdrains and media) for
one additional effluent filter, and additional ultraviolet disinfection modules for
increased disinfection capacity.
All of the proposed improvements are to provide increased reliability and improved operations,
but no capacity change is requested.
A Civil/Mechanical Design Memorandum is included in this application for reference, and
provides a more detailed description of the work included in this contract.
Please contact me at [phone] or Maggie Becker in our office at [phone] if you
have any questions about this project.
Very truly yours,
BLACK & VEATCH
LN;,ONAL COMPANY
l (.u'-
David M. Parker, P.E.
Project Manager
McD3/jhb
Enclosures
cc: Barry Gullet, CMU
Pete Goins, CMU
Tom Howard, CMU
Jerome Lucky, CMU
Rex Gleason, NCDENR—Mooresville (w/1 copy of plans and specs, 1 copy memo)