NC0020401_AUTHORIZATION TO CONSTRUCT_20130122

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NPDES DOCUMENT SCANNIN& COVER SHEET
NPDES Permit: NC0020401
Hickory - Northeast WWTP
Document Type: Permit Issuance
Wasteload Allocation
Authorization to Construct`,
{AtQ
Permit Modification
Speculative Limits
201 Facilities Plan
Instream Assessment (67B)
Environmental Assessment (EA)
Permit
History
Document Date: January 22, 2013
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City of Hickory
A To C No. 020401 A02
Project No. CS370389-18
Issued June 1, 2010
Engineer's Certification
1►•
I, M. Keith Webb, P.E., as a duly registered Professional Engineer in
the State of North Carolina, having been authorized to observe (full time) the construction of the
modifications and improvements to the City of Hickory Northeast W WTP, located at 310
Cloninger Mill Road, Hickory, Catawba ounty, North Carolina here—bys—ta—t—e-ITiat, to the best of
my abilities, due care and diligence was used in the observation of the following construction:
Modifications to the existing 6.0 MGD Northeast Wastewater Treatment Plant consisting
of an influent pump station with dual mechanical automatic bar screens rated at 15 MGD (each)
peak flow, parshall flume in combination with ultrasonic level sensor, three (3) 6,400 gpm
pumps with VFDs, 650 kW on-site generator; vortex grit removal system rated at 20 MGD with
grit classifier; flow splitter; dual 3 MDG oxidation ditch, each consisting of a 0.25 MG anaerobic
basin with four (4) 4.8 Hp submersible mixers, a 0.29 MG anoxic basin with two (2) 7.7 Hp
submersible mixer, a 2.22 MG oxidation ditch basin with two (2) 200 Hp mechanical surface
aerators and two (2) 18.2 Hp submersible mixer; clarifier flow splitter box; a 100-ft diameter
clarifier with 16 ft side water depth; renovation of two (2) existing 90-feet diameter clarifiers to
center feed with a spiral rake; an additional single channel 0.067 MG chlorine contact basin;
modifications to chlorine and sulfur dioxide feed and storage equipment; replacement of existing
course bubble post aeration system piping and blowers; conversion of existing Aeration Basin #2
to sludge holding/digestion system with two (2) 6,500 scfm multi-stage centrifugal blowers; two
(2) gravity belt thickeners rated at 400 gpm and two (2) 200 gpm progressive cavity thickened
sludge pumps; five (5) 1,700 gpm, RAS pumps with VFD; two (2) 550 gpm progressive cavity
WAS pumps; three (3) 550 GPM progressive cavity sludge transfer pumps; caustic feed system;
odor control system consisting of carbon adsorption system, ozone odor control system, and
biofilter odor control system; a 2,000 kW WWTP on-site generator; plant SCADA system;
decommissioning of select portions of the existing plant equipment; and associated site work,
electrical work, and yard piping, 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. i Z B09
Date 1 - Zz
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Send to: Construction Grants & Loans #���•Q�o �ssa y9r.;60 t_
DENR/DWQ SEAL
1633 Mail Service Center 128G9
Raleigh, NC 27699-1633 =Z� .,• FyG� ��r. ,.

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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
.Tune I, 2010
The Honorable Rudy Wright, Mayor
City of Hickory
P.O. Box 398
Hickory, North Carolina 28603-0398
SURUCT: Authorization to Construct
A to C No. 020401 A02
City of Hickory
Northeast WWTP Improvements
Dear Mayor Wright:
A letter of request for an Authorization to Construct (ATC) was received November 18,
2009, by the Division of Water Quality (Division), and final plans and specifications for the
subject project have been reviewed and found to he satisfactory. Authorization is hereby granted
for the construction of modifications to the existing 6.0 MGD Wastewater Treatment Plant, with
discharge of treated wastewater into Lake Hickory in the Catawba River Basin.
This authorization results in the design and permitted capacity of 6.0 MGD, and is
awarded for the following construction:
Modifications to the existing 6.0 MGD Northeast Wastewater Treatment Plant consisting
of: an influent pump station with dual mechanical automatic bar screens rated at 15 MGD
(each) peak flow, parshall flume in combination with ultrasonic level sensor, three (3)
6,400 gpm pumps with VFDs, 650 kW on-site generator; vortex gnt removal system
rated at 20 MGD with grit classifier, flow splitter; dual 3 MGD oxidation ditch, each
consisting of a 0.25 MG anaerobic basin with four (4) 4.8 Hp submersible mixers, a 0.29
MG anoxic basin with two (2) 7.7 Hp submersible mixer, a 2.22 MG oxidation ditch
basin with two (2) 200 Hp mechanical surface aerators and two (2) 18.2 Hp submersible
mixer; clarifier flow splitter box; a 100-ft diameter clarifier with 16 ft side water depth;
renovation of two (2) existing 90-feet diameter clarifiers to center feed with a spiral rake;
an additional single channel 0.067 MG chlorine contact basin; modifications to chlorine
and sulfur dioxide feed and storage equipment; replacement of existing course bubble
post aeration system piping and blowers-, conversion of existing Aeration Basin #2 to
sludge holding/digestion system with two (2) 6,500 scfm multi-stage centrifugal blowers;
two (2) gravity belt thickeners rated at 400 gpm and two (2) 200 gpm progressive cavity
11i33 Mail Service Cenier,Raleigh.North Carolina 27699-1633 {)nL E
1.ecauon 2728 Capital Blvd.Raleigh North Carolina 27601 Nn�111 Ccll'ollllil
Phone [phone] FAX '319-f 15-6229 Cusloma:r Senmce 1-877-623-6748 I
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The Honorable Rudy Wright, Mayor 1k
June 1, 2010
Page 2
thickened sludge pumps: five (5) 1,700 gpm, RAS pumps with VFD; two (2) 550 gpm
progressive cavity WAS pumps; three (3) 550 gpm progressive cavity sludge transfer
pump~; caustic feed system: odor control system consisting of carbon adsorption system,
ozone odor control system, and biofilter odor control system; a 2,000 kW WWTP on-site
generator; plant SCADA system; decommissioning of select portions of the existing plant
equipment; and associated site work, electrical work, and yard piping, in conformity with
the project plans, specifications, and other supporting data subsequently filed and
approved by the Department of Environment and Natural Resources.
This ATC is issued in accordance with Part III, Paragraph A of NPDES Permit No.
NCO020401 issued April 19, 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. NC0020401.
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(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 11, 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.

r The Honorable Rudy Wright, Mayor
June 1, 2010
Page 3
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.
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 ATC 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 in a separate
transmittal. If you have any questions or need additional information, please contact Seth
Robertson, P.E. at telephone number [phone].
Sincerely,
..,.e.--oleen H. Sullins
st:sr
cc: Scott Snyder, P.E., AECOM, 1460 John B. White, Sr. Blvd, 1C, Spartanburg, SC
Catawba County Health Department
DWQ Mooresville Regional Office, Surface Water Protection
DWQ, Technical Assistance and Certification Unit
DWQ, Point Source Branch, NPDES Program
Daniel Blaisdell, P.E.
Seth Robertson, P.E.
Steve Tsadwa, E.I.
SRF File