NC0020621_AUTHORIZATION TO CONSTRUCT_19960603

NPDES DOCUMENT SCANNING COVER SHEET
NPDES Permit:
NC0020621
Boone (Jimmy Smith) WWTP
Document Type:
Permit Issuance
Wasteload Allocation
Authorization to Construct
(AtQ
Permit Modification
Complete File - Historical
Correspondence
Instream Assessment (67b)
Environmental Assessment (EA)
Permit
History
Document Date:
June 3, 1996
This document is pri:tted on reuse paper - iganore aay
content on the reverse side

` State'of 'Ndrth Carolina
Department of Environment,
Health and Natural Resources
.L Division of Environmental Management
James B.,Hunt, Jr., Governor
Jonathan B. Howes, Secretary
A. Preston Howard, Jr., P.E., Director
June 3, 1996
Mr. Greg Young, Town Manager
Town of Boone
P. O. Box 192
Boone, North Carolina 28607-0192
SUBJECT:
Dear Mr. Young:
Town of Boone
Permit No. NCO020621
Authorization to Construct
Wastewater Treatment Facilities
Project No.CS370493-04
Watauga County
The final plans and specifications for the subject project have been reviewed and
found to be satisfactory.
Authorization is hereby granted for the construction of improvements to upgrade
and expand the existing Boone Wastewater Treatment Plant from 3.2 MGD to 4.82 MGD
capacity to consist of headworks modifications including raising wall height of the
existing screen chamber above 100 year flood elevation, installation of new mechanically
cleaned bar screens, and conversion of a comminuter box to a septage dumping station;
influent pump station improvements including replacement of the existing pumps with
three (3) 5750 gpm submersible pumps with variable -speed drives, installation of a
magnetic influent flow meter, and the addition of a monorail with hoist for pump
removal; a new aerated grit and grease removal unit; conversion of the existing
rectangular primary and secondary clarifiers to aerated flow equalization tanks;
construction of dual, parallel (oxidation ditch type) tanks with fine bubble diffusers for
extended aeration; new flow splitter boxes; two (2) new 95 ft. by 14 ft. SWD clarifiers
Construction Grants & Loans Section �T �� FAX [phone]
P. O. Box 29579, Raleigh, North Carolina 27626-0579 l Yt7 f An Equal Opportunity Affirmative Action Employer
Voice 919-733-6900�99�'„�,,,P' 50% recycled/10% post -consumer paper

2
with scum pumps; new blower/sludge return pump building; 4-cell deep bed tertiary
filter; U.V. disinfection; Parshall flume for effluent flow measurement; step cascade for
post aeration; lime storage and feed facilities for alkalinity control; new sludge handling
facilities to dewater and pasteurize aerobically digested sludge, including a belt filter
press, polymer mixing and feed facilities for sludge conditioning, a 600 lb./hr. thermal
drying system with odor control scrubbers, sludge loading station, and a covered pad for
temporary storage of dried cake; a 1200 sq. ft. addition to the existing
laboratory/administration building; new 900 KW generator for emergency standby power
to supplement existing generator capacity; SCADA system for process monitoring; new
paved plant access road and improvements to the existing on -site road system; and all
associated site work, yard piping, and electrical work including demolition of the existing
trickling filters and sludge drying beds not needed for the upgraded facilities.
Alternate sludge handling facilities based on lime stabilization will be bid and may
be selected, at. the Owner's option, in lieu of the thermal sludge drying system. The
alternate equipment to be bid includes a second belt filter press, lime storage and feed
facilities, sludge/lime mixer, heated and insulated pasteurization vessel, and air scrubber
for odor control.
Do not proceed with construction until the Authorization -to -Award package, EEO,
and MBE documentation/certification have been reviewed, and you are in receipt of our
approval, if funding is desired for project construction.
The Permittee shall employ a State certified wastewater treatment plant operator to
be in responsible charge of the wastewater treatment facilities. Such operator must hold a
valid State Certificate of the grade at least equivalent to the classification assigned to the
wastewater treatment facilities by the Certification Commission. When a new chief
operator must be obtained to be in responsible charge of the new facilities, it is required
that this be done by the time the construction of the facilities is 50% complete.
The Authorization -to -Construct is issued in accordance with Part III, Paragraph B
of NPDES Permit No. NC0020621, issued May 3, 1996, and shall be subject to
revocation unless the wastewater treatment facilities are constructed in accordance with
the approved plans, specifications, and supporting documents; and are in compliance with
the conditions and limitations specified in Permit No. NC0020621.

3
The Permittee shall have an acceptable sludge analysis and a sludge toxicity
analysis which have been approved by the Division of Environmental Management,
Water Quality Section prior to the disposal of any sludge from the new wastewater
treatment plant. Copies of the analyses, supporting documents, and approvals shall be
submitted to the Division of Environmental Management's Winston-Salem Regional
Office.
The disposing, selling or free distribution of wet, dried, composted sludge or
sludge -like materials from wastewater facilities without prior review and approval by this
Division is illegal.
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.
One ( I ) set of final approved plans and specification is to be forwarded to you for
your files. The copy of the approved plans and specifications shall be maintained on file
by the Owner for the life of the project.
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 approved plans and specifications. Mail
the Certification to the Permits and Engineering Unit, P. O. Box 29535, Raleigh, North
Carolina 27626-0535.

rd
If you have any questions or need additional information, please contact Mr. Cecil
C. Madden Jr., PE [phone].
Sincerely.
J,
['reston I oward, Jr., P.E.
Attachment
RPT: pe
cc: Hobbs, Upchurch & Associates (A/E)
Mr. Don Salrit
Winston-Salem Regional Office
Mr. Tom Fahnestock
Mr. Don Evans
Ms. Valerie Lancaster
Mr. Robert Teulings, Project Engineer
Ms. Kim Brantley
DMU
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