NC0026441_Authorization to Construct_19920102

NPDES DOCUNENT SCANNING COVER SHEET
NPDES Permit:
NCO026441
Siler City WWTP
Document Type:
Permit Issuance
Wasteload Allocation
Authorization to Construct (AtC)
Permit Modification
Engineering Alternatives Analysis
201 Facilities Plan
Instream Assessment (SOC)
Correspondence
Permit History
Date Range:
Document Date:
January 2, 1992
THIS DOCUMENT IS PRINTED ON REUSE PAPER - IGNORE AN) CONTENT ON THE
REVERSE SIDE
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State of North Carolina
Department of Environment, Health, and Natural Resources
Division of Environmental Management ° J i'= 1.
512 North Salisbury Street • Raleigh, North Carolina 27611 J' 9
James G. Martin, Governor
William W. Cobey. Jr., Secretary
January 2, 1992
Mr. Tim Johnson, Town Manager
Town of Siler City
P. O. Box 769
Siler City, North Carolina 27344
Dear Mr. Johnson:
George T. Everett, Ph.D.
Director
IJ
C_
—n
SUBJECT: Town of Siler City
Permit No. NCO026441 CA
Authorization to Const=ct
Wastewater Treatment Facilities
Project No. CS370427-04
Chatham 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 and operation of
additions and modifications to the existing 1.8 MGD two stage aeration
wastewater treatment facility with an increase in.capacity to 4.0 MGD for
biological phosphorous removal facilities to include conversion of existing
basins for flow equalization and sludge digestion and storage; a new
mechanical bar screen with manual bypass; an influent Parshall flume with
flow recorder; a detritor grit removal unit; a DAF unit for grease and
scum removal; an influent pump station with four (4) variable speed 700 -
3,250 gpm pumps; dual oxidation ditches with jet aeration, three (3) 5,500
gpm recirculation pumps per basin, and three (3) 2,925 scfm blowers; dual
flocculator clarifiers; a return sludge pump station with three (3) 1,200
gpm pumps; a 2,188 sq. ft. deep bed tertiary filter system; additions to the
existing chlorine system; a new sulfur dioxide dechlorination system;
cascade post aeration; a DAF sludge thickener; a sludge transfer pump
station with two (2) 550 ggn pumps, additions to the existing non -potable
plant water system with two (2) 200 gpm pumps; a chemical storage and feed
system consisting of two (2) 10,000 gallon alum storage tanks with
associated day tanks, pumps, etc. and a 2,500 cubic feet lime storage bin
with associated mix tanks, pumps, etc.; a 1,475 sq. ft. laboratory and
office building; and associated yard piping, site work, instrumentation and
electrical work. In addition, eleven (11) manholes will be sealed and three
(3) manhole vents will be installed along the Loves Creek interceptor.
Pof)udon Pn radon Pays
P.O. Box 27687, Raleigh, North Carolina'27611-7687 Telephone [phone]
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Page 2
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
oonstruction.
The Permittee shall employ an actively 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 waste-
water 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 C of NPDES Permit No. NC0026441, issued November 4, 1991 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. NCo026441.
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 Raleigh Regional Office.
The disposing, selling or free distribution of wet, dried, cceposted
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 (1) set of final approved plans and specifications 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.

Page 3
•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 Certifica-
tion to the Permits and Engineering Unit, P. 0. Box 29535, Raleigh, Ibrth
Carolina 27626-0535. (Engineer's Certification Form is attached.)
If you have any questions or need additional information, please
contact Mr. Bill Hoffman, at (919L__T�3-6900, extension 615.
Un V�
George T.
Attachment
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cc: Hobbs, Upchurch, Inc.
Mr. Don Safrit?
® Raleigh Regional Office
Mr. Ton Fahnestock
Mr. Don Evans
Ms. Valerie Lancaster
Mr. Bennie Goetze, Jr.
Ms. Cindy Finan
DMU
SRF
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