NC0020591_Authorization to Constuct_19951201

NPDES DOCYNENT SCANNING COVER SHEET
NPDES Permit: NC0020591
Statesville / Third Creek WWTP
Document Type: Permit Issuance
Wasteload Allocation
Authorization to Construct
(AtC)
Permit Modification
Complete File - Historical
Engineering Alternatives (EAA)
Compliance
Instream Assessment (67b)
Speculative Limits
Environmental Assessment (EA)
Document Date: December 1, 1995
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State of North Carolina
Department of Environment,
Health and Natural Resources &I71.9MA,
Division of Environmental ManagementAA
James B. Hunt, Jr., Governor
Jonathan B. Howes, Secretary p E= H N F1
A. Preston Howard, Jr., P.E., Director
December 1, 1995
Mr. Joe Hudson, Jr., Director, Water/Wastewater Treatment
City of Statesville
P.O. Box 1111
Statesville, North Carolina 28677
Subject: Permit No. NCO020591
Authorization to Construct
City of Statesville-Third Creek
Wastewater Treatment Plant
Iredell County
Dear Mr. Hudson:
A letter of request for an Authorization to Construct was received October 4, 1995 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 removal of the residuals and existing clay liner in aeration basin
No. 2; construction of a concrete basin for aeration basin No. 2; the addition of 4 floating mixers and all
the associated valves, piping, and appurtenances. The concrete basin for aeration basin No. 2 shall be
constructed to maintain, at minimum, the current volume. Disposal of soils, decant, and residuals shall
comply with all applicable laws and permits.
Any groundwater monitoring, as deemed necessary by the Division, shall be provided.
This Authorization to Construct is issued in accordance with Part III, Paragraph A of NPDES
Permit No. NCO020591 issued July 29, 1994, and shall be subject to revocation unless the wastewater
treatment facilities are constructed in accordance with the conditions and limitations specified in Permit No.
NC0020591.
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 Environmental Management.
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 in-place 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.
P.O. Box 29535, Raleigh, North Carolina 27626-0535 Telephone [phone] FAX [phone]
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Permit No. NC0020591
Authorization to Construct
City of Statesville-Third Creek
Wastewater Treatment Plant
Page 2
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 the Permits and Engineering Unit, P.O. Box 29535, Raleigh, NC
27626-0535.
A copy of the approved plans and specifications shall be maintained on file by the Permittee for the
life of the facility.
Failure to abide by the requirements contained in this Authorization to Construct may subject the
Permittee to an enforcement action by the Division of Environmental Management 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 Susan A. Wilson, telephone number 919/733-
5083, ext. 555.
Sincerely,
�11 " '4// 7rU�
Preston Howard, Jr., P.E.
cc: Mooresville Regional Office, Water Quality
Central Files

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Date: November 1, 1995
AUTHORIZATION TO CONSTRUCT
NPDES PERMIT
REPORT AND RECOMMENDATIONS
County: Iredell
Permit No.NCO020591 (AC0020591)
'A.
PART I- GENERAL INFORMATION '
1. Facility and Address: Third Creek WWTP
City of Statesville
Post Office Box 1111
Statesville,NC 28677
2. Date of On-Site Investigation(if conducted): October 24, 1995
3. Report Prepared By: Todd St. John
4. Persons Contacted and Telephone Number: Judy Woodruff, ORC
5. Verified Discharge Point(s),List for All Discharge Points:
Latitude: 350 44' 17" Longitude: 800 50' 25"
Attach a USGS map extract and indicate treatment facility site and discharge point on
map. Ensure discharge point(s) correspond to NPDES permitted discharge points.
USGS Quad No.: El5NE USGS Quad Name: Shepherds,NC.
6. Size (land available for expansion and upgrading):* Aeration basin already exists.
7. Topography (relationship to flood plain included): Does not appear to be in a flood plain.
8. Location of Nearest Dwelling: None within 500 feet. .
PART II-DESCRIPTION-OF DISCHARGE AND TREATMENT WORKS
1. Type of Existing Treatment Facility: Subject aeration basin currently exists. There are
five platform aerators.

2. Type of proposed TrexLmc_a Facility: T le s bb c,,ct aerator basin aas bee. emt--ded. Tile
basin will be relir_ed with concrete and four iloadigg mixers will be added.
3. Sludge Handling and Disposal Scheme: QUA
4. Treatment Plant Classification(attached completed rating sheet): Improvements to
aeration basin will not change classification.
5. SIC Code(s): 4952
Wastewater Code(s):
Primary: 0 i
Secondary:
Main Treatment Unit Code: 05007
c
PART III-EVALUATION AND RECOMN ENDATIONS
This facility is currently under an SOC as a result of elevated cadmium levels in the
effluent and sludge. The cadmium most likely originated from effluent from Southern Fasteners
which is no longer in business. The cadmium probably became entrained in the sludge and
adsorbed in the clay liners in the aeration basins and digester. The cadmium is then believed to
have leached from these sources. Therefore, relining the basins with concrete should alleviate
the elevated cadmium levels. However,the relining of subject aeration basin is not'included as a
stipulation in the current SOC. Compliance with the final effluent cadmium limits was to occur
October 31, 1995.
The additional mixers should serve to improve the efficiency of the subject aeration
basin.
Therefore, this Office recommends the issuance of the authorization to construct for this
project.
Signature o Report P eparer
D
Water Quality Region Supervisor
Date