NC0063321_Authorization to Construct_19981009

NPDES DOCIMENT SCANNING COVER SHEET
NC0063321
Cashiers WWTP #3
NPDES Permit:
Document Type:
Permit Issuance
Wasteload Allocation
Authorization to Construct (AtC)
Permit Modification
Complete File - Historical
Engineering Alternatives (EAA)
Correspondence
Owner Name Change
Meeting Notes
Instream Assessment (67b)
Speculative Limits
Environmental Assessment (EA)
Document Date:
October 9, 1998
Thies document is printed on reuse paper. - igiuore :my
content on the reirerese side

rs
State of North Carolina
Department of Environment
and Natural Resources
Division of Water Quality
James B. Hunt, Jr., Governor
Wayne McDevitt, Secretary
A. Preston Howard, Jr., P.E., Director
Mr. Jerry R. King
Executive Director
Tuckaseigee Water & Sewer Authority
Post Office Box 1051
Sylva, North Carolina 28779
October 9, 1998
e��
DENR
Subject: Permit No. NC0063321
Authorization to Construct
ATC No. 063321ACC
Cashiers WWTP
Jackson County
Dear Mr. King:
On August 20, 1998, the Division of Water Quality received your request for Authorization to
Construct (ATC) in accordance with NPDES Permit Number NC0063321. The plans and specifications
for adding a standby generator capable of powering the Cashiers WWTP and for building an enclosure
to house the existing blowers have been reviewed and it was determined that they are satisfactory.
Authorization is hereby granted for the installation of a standby generator and an enclosure to house the
existing blowers. The enclosed copy of the approved plans and specifications must be maintained on
file for the life of the facility.
This Authorization to Construct is issued in accordance with Part III, Paragraph A of NPDES
Permit No. NC0063321 issued April 21, 1998, and shall be subject to revocation unless the proposed
residuals storage tank is constructed in accordance with the conditions and limitations specified in
Permit No. NC0063321.
Please be advised of the deadlines associated with the special conditions included in permit
NC0063321 issued on April 21, 1998:
• Automatic Standby Power Requirement
It is a requirement of Title 15A of the North Carolina Administrative Code, Subpart 2H.0219
(j) (3)(A) that dual source/dual feed or automatically activated standby power capable of
powering all essential treatment components under design conditions is required for all
treatment works. The Permittee is required to install an automatic backup power system
within 90 days of the effective date of the permit.
P.O. Box 29535, Raleigh, North Carolina 27626-0535 Telephone [phone] FAX [phone]
An Equal Opportunity Affirmative Action Employer 50% recycled/ 10% post -consumer paper

Permit No. NC0063321
Cashiers WWTP
Page 2 of 4
• Noise Reduction Requirement
The Permittee is required to prepare and submit a proposed design of an enclosed structure
for the blowers or other noise reduction equipment within three (3) months of the effective
date of the permit and final installation within six (6) months.
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 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.
Upon completion and prior to the 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. Mail the Certification to the following address:
Department of Environment and Natural Resources
Division of Water Quality
NPDES Unit, 9th Floor
Post Office Box 29535
Raleigh, North Carolina 27626-0535
The Operational Agreement between the Permittee and the Environmental Management
Commission is incorporated herein by reference and is a condition of this Permit. Noncompliance with
the terms of the Operational Agreement shall subject the Permittee to all sanctions provided by G. S.
143-215.6 for violation of or failure to act in accordance with the terms and conditions of this Permit.
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.
In closing, I would like to state that it is the Division's ultimate goal to provide quality service to
the public.' Please take a moment to review the procedures you followed in applying for this
Authorization to Construct in addition to the Division's response to your project needs. If we can
improve our service to you in any manner, please bring it to our attention. We appreciate your
cooperation during the review process and we look forward to working with you in the future.

Permit No. NC0063321
Cashiers WWTP
Page 3 of 4
If we can be of further assistance to you or if you would like to suggest any improvements we
can make to strengthen our customer service efforts, please do not hesitate to contact Jeff Myhra of my
staff at [phone], extension 597.
Preston Howard, Jr.
cc: Central Files
NPDES Unit, Permit File
Asheville Regional Office, Bill Anderson
Technical Assistance and Certification Unit
Ms. Jane Gorsline
P.O. Box 272
Cashiers, NC 28717
Mr. John Druffus
Brookings
P.O. Box 1069
Cashiers, NC 28717

e
Permit No. NC0063321
Cashiers WWTP
Page 4 of 4
Engineer's Certification
I, , as a duly registered Professional Engineer in the State of North
Carolina, was authorized to observe (periodically, weekly, full time) the construction of the
for the Permittee.
Project Name Location
I hereby state that, to the best of my abilities, due care and diligence was used in the observation
of construction at the Cashiers Wastewater Treatment Plant. Installation of the standby generator and
the enclosure for the blowers was observed to be within substantial compliance and intent of the
approved plans and specifications:
Signature: Registration No.
Date:
t

J. Wayne Craig
Stewart W. Hubbell
Sam H. McGhee. III
Gene R. Cress
Edwin K. Mattern. Jr. 1949-1982
Mr. Jeffrey T. Myhra
Environmental Engineer
NCDENR
P.O. Box 29535
Raleigh, NC 27626-0535
SINCE Mattern & Craig
1978
CONSULTING ENGINEERS • SURVEYORS
September 16, 1998
Re: Cashiers WWTP
Permit No. NC0063321
Comm. No. 1457P
Dear Mr. Myhra:
The following are our responses to your comments of February 5, 1998:
1) See Sheet 3 as revised.
2) See Sheet 8 for details of chlorination/dechlorination.
3) Baffle (Sect. 8.3) and serpentine design will prevent short circuiting in the tarilc'-
4 ,:.Underflow baffle in Section 8.1 will prevent. SO2om enteringcontact tank. ;
. P z ,�r4"t
Wm. James Jones
Michael S. Agee
Steven A Campbell
Kyle D. Austin
Randy W. Beckner
5)
CL2 is added to system in manhole adjacent to CL2/SO2 chamber.
The requirement of 2H.0219(j)(6) is for "seasonal or resort facilities". This treatment
facility is for the entire Town of Cashiers and the surrounding area. It does not serve
a "facility". Furthermore, the design flow is for the highest expected "seasonal" flow
with a peak factorof 2.5.
429 Clay Street, Kingsport, Tennessee 37660
[phone] Fax [phone]

Mr. Jeffrey T. Myhra
September 21, 1998
Page 2
7) See Sheet 3 as revised and Sheet 4 as submitted.
8) These are existing units.
9) This unit is a single tank with reinforcing brace. Tank is field welded together.
10) Overflow from the backwash tank and the backwash holding tank goes into the CL2
manhole, not on the ground.
11) This design is identical to existing. There is no mixing in the existing tank and no
operational problem.
12) A hand -off -auto (HOA) switch is provided for each pump. Piping arrangement (See
Sheet 7) allows for manual by-pass.
13) See Sheet 8 as revised.
14) See Sheet 7 as revised.
15) See Sheet 9 as revised.
16) The pump is a rotary positive displacement. Therefore, backflow is impossible. The
line is routed such as to avoid freezing.
17) See Sheets 9, 10 & 11 as revised.
18) See Sheets 4 & 14 as revised.
19) See Sheet 4 as revised.
20) Specified CL2 and SO2 injectors require a minimum supply pressure of 25 psi. This
is being verified and will be supplied to you shortly.
- sy.
21) The plans as submitted contained a new emergency generator capable of runni g the `
entire plant. However, this unit is now shown`as existing as the Owner is currently
pursuing the installatiori of the generator.
22) The hydraulic grade calculations are included in the enclosed design calculations.

Mr. Jeffrey T. Myhra
September 21, 1998
Page 3
23) 30,000 gallons of residual storage is provided which meets the requirement of
2H.0219(j)(9).
Also, enclosed, please find a $200 check for the review fee. If you have any questions,
please feel free to call.
Sincerely,
MATTERN & CRAIG, INC.
4J•
za„,
Randy W. Beckner, P.E.
Principal
RWB/alf