NC0025496_Authorization to Construct_20010628

NPDES DOCUMENT SCANNING. COVER SHEET
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ANN
NPDES Permit:
NC0025496
Lincolnton WWTP
Document Type:
Permit Issuance
Wasteload Allocation
i._
Authorization to Construct
(AtC)
Permit Modification
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Document Date:
June 28, 2001
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WCDErR
Michael F. Easley
Govemor
William G. Ross, Jr., Secretary
Department of Environment and Natural Resources
Kerr T. Stevens
Division of Water Quality
June 28, 2001
Mr. Jeff Emory, City Manager
City of Lincolnton
P.O. Box 617
Lincolnton, North Carolina 28093-0617
SUBJECT: Authorization to Construct
ATC No. 025496ACB
City of Lincolnton
Lincolnton WWTP
Lincoln County
Project No. CS370456-04
Dear Mr. Emory:
A letter of request for Authorization to Construct was received 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 6 MGD
Lincolnton Wastewater Treatment Plant, with discharge of treated wastewater into the South
Fork Catawba River in the Catawba River Basin.
This authorization results in no increase in design or permitted capacity and is awarded
for the construction of the following specific modifications:
Modifications to the influent pump station including the replacement of existing pumps with one
(1) 3125 GPM pump, and two (2) 6250 GPM pumps; modifications to the influent screening
structure to provide a new mechanical bar screen with screening wash, compactor and manual
bar screen bypass channel; a dual vortex grit removal system; the construction of a new
concentric oxidation ditch with four (4) 50 HP rotors to replace the existing primary clarifiers
and trickling filters; installation of fine bubble diffused aeration in the existing aeration basins;
two (2) new 100-foot diameter 14-foot sidewater depth secondary clarifiers to replace the
existing clarifiers; a new return sludge pump station with dual 90 HP submersible pumps
controlled by VFDs; a new chemical storage and feed building with sodium hypochlorite feed
equipment, sodium bisulfite feed, and acetic acid feed; a new chlorine contact tank;
modifications to two (2) existing anaerobic digesters to include new mixing equipment, two (2)
new floating digester covers, one (1) new floating gas holder cover, and heat exchanger
equipment; a new 12-foot by 65-foot dissolved air flotation thickener; modifications to generator
Customer Service
Construction Grants & Loans 1633 Mail Service Center Raleigh, NC 27699-1633 [phone]
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sets G-1 and G-3, plus the addition of a new 750 KW generator set G-4 with automatic transfer
switches; a 5673 square foot laboratory building all associated yard pipe, site work and electrical
work.
This Authorization to Construct is issued in accordance with Part III, Paragraph A of
NPDES Permit No. NC0025496 issued July 24, 1995, and shall be subject to revocation unless
the wastewater treatment facilities are constructed in accordance with the conditions and
limitations specified in Permit No. NC0025496.
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 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, the Authorization to Construct 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 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 Title 15A, Chapter 8A, .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 Title
15A, Chapter 8A, .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.
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.
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].
Sincerel
Kerr T. Stevens
Director
CGM:dr
cc: Pease Associates
Lincoln County Health Department
Mooresville Regional Office, Water Quality Section
Technical Assistance and Certification Unit
Daniel Blaisdell, P.E.
Dave Goodrich, NPDES Permitting Unit
Cecil G. Madden, Jr., P.E.
SRF
" °

CITY OF LINCOLNTON WWTP
ATC No. 025496ACB
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 Lincolnton WWTP, located on North
Carolina Highway 150 in Lincoln County for the City of Lincolnton, hereby state that, to the best
of my abilities, due care and diligence was used in the observation of the following construction:
Modifications to the influent pump station including the replacement of existing pumps with one
(1) 3125 GPM pump, and two (2) 6250 GPM pumps; modifications to the influent screening
structure to provide a new mechanical bar screen with screenings wash , compactor and manual
bar screen bypass channel; a dual vortex grit removal system; the construction of a new
concentric oxidation ditch with four 50 HP rotors to replace the existing primary clarifiers and
trickling filters; installation of fine bubble diffused aeration in the existing aeration basins; two
(2) new 100-foot diameter 14-foot sidewater depth secondary clarifiers to replace the existing
clarifiers; a new return sludge pump station with dual 90 HP submersible pumps controlled by
VFD's; a new chemical storage and feed building with sodium hypochlorite feed equipment,
sodium bisulfite feed, and acetic acid feed; a new chlorine contact tank; modifications to two
existing anaerobic digesters to include new mixing equipment, two (2) new floating digester
covers, one (1) new floating gas holder cover, and heat exchanger equipment; a new 12-foot by
65-foot dissolved air flotation thickener; modifications to generator sets G-1 and G-3 plus the
addition of a new 750 KW generator set G-4 with automatic transfer switches; a 5673 square foot
laboratory building all associated yard pipe, site work and electrical work.
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.
Signature Registration No.
Date
Mail this Certification to the
Cecil G. Madden, Jr., P.E.
Construction Grants & Loans
DENR/DWQ
1633 Mail Service Center
Raleigh, NC 27699-1633