NC0031879_Authorization to Construct_20081217

b.
Michael F. Easley, Governor
William G. Ross Jr., Secretary
North Carolina Department of Environment and Natural Resources
Coleen H. Sullins, Director
Division of Water Quality
December 17, 2008
Mr. J. Robert Boyette, City Manager
City of Marion
P.O. Drawer 700
Marion, North Carolina 28752
SUBJECT: Authorization to Construct i
A to C No. 031879A01
City of Marion
Corpening Creek WWTP
Project No. CS370406-02
McDowell County
Dear Mr. Boyette:
P-evm;4 I(
A letter of request for an Authorization to Construct was received September 16, 2008,
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 3.0 MGD Wastewater Treatment Plant, with discharge of treated wastewater into
Corpening Creek in the Catawba Basin.
This authorization results in no increase in design or permitted capacity and is awarded
for the construction of the following specific modifications:
Installation of a new headworks system, capable of treating a peak flow of 7.5
MGD, consisting of an influent pump station with three (3) 2,600 gpm 30 Hp
pumps, a mechanical barscreen with manual bypass, a grit removal system;
replacement of the fixed platform aerators with six (6) 20 Hp floating rotary brush
aerators in each of two basins; installation of a new chlorination and
dechlorination system; installation of a new 925,000 gallon sludge holding tank
with three (3) 150 Hp blowers, replacement of two (2) 100 gpm 5 Hp sludge
pumps, and a new 200 gpm 3 Hp sludge wasting pump, in conformity with the
project plans, 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. NC0031879 issued November 22, 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. NC0031879.
NNo hCarolina
!'aturally
North Carolina Division of Water Quality 1617 Mail Service Center Raleigh, NC 27699-1617 Phone [phone] Customer Service
Internet: www.ncwaterquality.orq 512 N. Salisbury St. Raleigh, NC 27604 FAX [phone]
An Equal Opportunity/Affirmative Action Employer — 50% Recycled/10% Post Consumer Paper

Mr. J. Robert Boyette
December 17, 2008
Page 2
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 Asheville 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: 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.
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.
4

Mr. J. Robert Boyette
December 17, 2008
Page 3
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 Seth Robertson, P.E. at telephone
number [phone].
Sincerely,
/061.vtAi-Ohiti.
SA— Coleen H. Sullins
MM:sr
cc: Randy Hintz, P.E. — McGill Associates, P.A., 55 Broad Street, Asheville, NC 28801
McDowell County Health Department
DWQ Asheville Regional Office, Surface Water Protection
Technical Assistance and Certification Unit
Point Source Branch, NPDES Program ✓
Daniel Blaisdell, P.E.
Seth Robertson, P.E.
Michelle McKay, E.I.
SRF File

City of Marion
A To C No. 031879A01
Project No. CS370406-02
Issued December 17, 2008
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 Corpening Creek WWTP, located
on NC Hwy 226 in McDowell County for the City of Marion, hereby state that, to the best of my
abilities, due care and diligence was used in the observation of the following construction:
Installation of a new headworks system, capable of treating a peak flow of 7.5
MGD, consisting of an influent pump station with three (3) 2,600 gpm 30 Hp
pumps, a mechanical barscreen with manual bypass, a grit removal system;
replacement of the fixed platform aerators with six (6) 20 Hp floating rotary brush
aerators in each of two basins; installation of a new chlorination and
dechlorination system; installation of a new 925,000 gallon sludge holding tank
with three (3) 150 Hp blowers, replacement of two (2) -100 gpm 5 Hp sludge
pumps, and a new 200 gpm 3 Hp sludge wasting pump, in conformity with the
project plans, specifications, and other supporting data subsequently filed and
approved by the 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.
Signature Registration No.
Date
Send to: Construction Grants & Loans
DENR/DWQ
1633 Mail Service Center
Raleigh, NC 27699-1633