NC0063321_Correspondence_19980609

NPDES DOCUMENT SCANNING COVER SHEET
NPDES Permit:
NC0063321
Cashiers WWTP #3
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:
June 9, 1998
'this document is printed on reuse paper - ignore any
content on the reirerse aside

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
June 9, 1998
Mr. Jerry R. King
Executive Director
Tuckaseigee Water & Sewer Authority
Post Office Box 1051
Sylva, North Carolina 28779
DENR
Subject: Cashiers WWTP Expansion
Return Number 2002
ATC No. ACC063321
Cashiers WWTP
Jackson County
Dear Mr. King:
In accordance with Division policy, we must hereby return the attached application and
associated material for the Cashiers WWTP expansion.
On February 5, 1998, the Division drafted an additional information request to note the
deficiencies in the design. This letter was sent to Mr. Wm. James Jones, P.E., of Mattern & Craig, Inc.
To date, the information identified in the additional information request has not been received for
Division review. Based on the lack of required documentation, the Division is returning all application
materials as incomplete.
Should you have any questions regarding this application, please do not hesitate to contact Jeff
Myhra at [phone], extension 597.
Sincer ,
filog
cf.r
A. Preston Howard, Jr., P.E.
cc: Central Files
Asheville Regional Office, Water Quality Section
NPDES Unit, Permit File
Mr. Wm. James Jones, P.E., Mattem & Craig, Inc.
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

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
February 5, 1998
Mr. Wm. James Jones, P.E.
Principal
Mattern & Craig, Inc.
Post Office Box 240
Asheville, North Carolina 28802
A7A
DENR
Z
Subject: Additional Information Request
Permit No. NC0063321
Cashiers WWTP
Jackson County
Dear Mr. Jones:
The Division has completed its review of the plans submitted for Authorization to Construct (ATC)
at the Cashiers WWTP. The following is a list of comments and/or concerns which should be addressed
at your earliest convenience:
• Sheet No. 3: As per 2H.0124 (3), dual train disinfection/dechlorination must be
provided.
• Sheet No. 3: Please provide chlorine contact/dechlorination tank details.
• Sheet No. 3: Over/under baffles in the chlorine contact tank should be provided to
prevent short circuiting in the tank.
• Sheet No. 8: A hydraulic drop between the chlorine contact tank and the
dechlorination tanks should be provided. As proposed, the SO2 will get into the
chlorine contact tank.
• Sheet No. 8: Please identify the C12 feed line.
• Sheet No. 3: Flow equalization must be provided for at least 25% of the permitted
hydraulic capacity. The existing flow equalization basin must be expanded to achieve
this requirement. In addition, it appears that the equalization tank level could cause a
backup in the office building sewer line. Raising the input point in the tank would be a
simple precautionary procedure.
• Sheet No. 3: Please label the digester unit on the proposed treatment system.
• Sheet No. 3: Please provide details of the influent flow splitter box and equalization
unit.
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 2
• Sheet No. 4: How does the flow enter the other internal train? The plans indicate
that a separate train is located on either side of the walkway. It is evident where the
influent enters the unit, but it is unclear how the flow enters the adjacent train.
• Sheet No. 7: The overflow identified on the backwash holding tank is a violation of
the regulations. This backwash tank should overflow into the mud tank rather than
onto the ground in case of an overflow.
• Sheet No. 7: It is recommended that some form a mixing be provided in the mud
tank.
• Sheet No 7: Completely automatic operation of the filter backwash system has
caused serious problems at this facility in the past. There should be some provision for
intervention if the filters get locked up on the backwash cycle.
• Sheet No. 7: Truck access should be provided for the filters.
• Sheet No. 7: The plans show 39 inches of filter media in 36 inches of tank. Please
clarify.
• Sheet No. 8: A 120 degree effluent flow measuring weir is too wide for the design
flow. Please review.
• Sheet No. 8: The sampling line exits the tank below the water level. Effluent will
gravity flow through this line if the pump leaks, etc. The line should come over the top
of the tank.
• Sheet No. 9: The office/laboratory should have windows or an escape hatch on the
wall opposite the door (a window on the door should also be provided). The lights
should be moved a little closer to the counters. In addition, a safety shower should be
provided. The proposed vent system is backward (i.e. chlorine and sulfur dioxide are
heavier than air).
• Sheet No. 14: TWSA has previously agreed to put all blowers in an enclosed
structure to reduce noise levels. Please provide details for the proposed enclosure.
• Sheet No. 4: The proposed blower pad should not be poured up against the metal
aeration tank. This will reduce nose levels.
• Consideration of moving the C12 and SO2 tanks closer to the contact tanks is warranted.
Using a waterless injection system or creating elevated water storage for the
disinfection system should be considered or the well yield should be certified.
• Standby -power is a requirement of 2H.0219 (j) (3). The following is required:
- Dual source/dual feed or automatically activated standby -power (with
automatic reset) supply on site, capable of powering all essential treatment
components under design conditions.
Please provide verification that the requirements of this condition are included in the
design.

Permit No. NC0063321
Cashiers WWTP
Page 3 of 3
• Please provide flow elevation contours. It appears that there are several contradictory
elevations.
• A minimum of 30-days of residual holding must be provided. This is a requirement of
2H.0219(j)(6).
If you have any questions concerning these comments, please do not hesitate to contact me at (919)
733-5083, extension 597.
Sin
effrey T. Myra, E.I.T.
Environmental Engineer
NPDES Group
cc: Asheville Regional Office / Water Quality Section
NPDES Unit

SOC PRIORITY PROJECT:No
To: Permits and Engineering Unit
Water Quality Section )
Attention: Jeff Myhra
AUTHOR IZATION— TCONSTRUCT
NPDES PERMIT
REPORT AND RECOMMENDATIONS
Date February 12, 1997
COUNTY Jackson
PERMIT NUMBER NC0063321
PART I - GENERAL INFORMATION
IF YES, SOC NUMBER
AcLo(033)-I
1. Facility Name and Current Address: TWASA Plant 3
Post Office Box 1051
Sylva, NC 28779
2. Changes since previous action on NPDES Permit: None
3. Compare Discharge Point(s) on plans with NPDES Permit application.
List of all discharge points:
XX I No Change
1 Change New Latitude: ° ' Longitude:
PART II - EVALUATION AND RECOMMENDATIONS
Please see page 2
A copy of the most recent
NPDES Staff Report is
attached.
0 / II
Prep
ater Quality Regional/Supery
1

After a cursory review of the plans the following comments are offered
for your consideration:
1. The engineer should provide flow elevation contours. There are
several contradictory elevations.
2 25% flow equalization capacity should be provided .
3 30 day sludge holding should be provided
4. We need influent flow splitter box details.
We need chlorine contact/dechlorination tank details
j.A Over/under baffles in the chlorine contact should be provided to
prevent short circuiting (layering) in the tank.
AB F
✓7. A hydraulic drop between the chlorine contact tank and the
dechlorination tank should be provided. As proposed, the SO2 will
get into the chlorine contact tank.
8. A 120 degree effluent flow measuring weir is too wide for the design
flow
9. The sampling line exits the tank below the waster level. Effluent
will gravity flow through this line if the pump leaks, etc. The
line should come over the top of the tank.
10. TWASA has previously agreed to put all the blowers in a "house" to
reduce noise.
dW-.,
°)ol.)-�11. Make sure the generator will run both plants and has automatic
switch over and automatic reset.
12. It looks like the equalization tank level could cause a back up in
the office building sewer line raising input point in the tank
looks simple.
-'"13. The proposed blower pad should not be poured up against the metal
aeration tank - to reduce noise.
14. There is no truck access to the filters. This is a bad mistake.
15. Completely automatic operation of the filter backwash system has
caused serious problems at this facility in the past. There should
be some provision for intervention if the filters get locked up on
the backwash cycle.
16. There probably should be some provision for mixing in the mud tank.
The overflow in the filter/backwash holding tank is a violation of
the regs.
18. The backwash tank should overflow into the mud tank rather than
2

18. The backwash tank should overflow into the mud tank rather than
onto the ground in case of an overflow.
ti 19. The plans seem to show 39 inches of filter media in 36 inches of
tank.
20. This site has a well for potable water we should give some
consideration to its location. c 1W, >
/7,21. Consideration of moving the cl and SO2 tanks closer to the contact
tanks is warranted. Using a water less injection system or
creating elevated water storage for the disinfection system should
be considered or the well yield should be certified.
�2. The office/laboratory should have windows or an escape hatch on the
wall opposite the door. The lights should be moved a little closer
to over the counters, a shower/safety shower should be provided.
Chlorine and sulfur dioxide are heavier than air, the proposed vent
system is backward.
23. Dual train disinfection/dechlorination must be provided.
I didn't check any numbers. You probably will need plans for the previous
upgrade before you can make sense of these. Requesting a break down of
the different systems on separate sheets would make the plans more
readable.
This discharge is to ORW and there is a great deal of public concern
regarding this facility.
RECOMMENDATION
Return plans as incomplete
3

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LOGICAL SUS, TEY
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J. Wayne Craig
Stewart W. Hubbell
Sam H. McGhee, III
Gene R. Cress
Edwin K. Mattem, Jr. 1949-1982
SINCE Mattern & Craig
1978
CONSULTING ENGINEERS • SURVEYORS
January 30, 1997
North Carolina Division of Environmental Management
Permits and Engineering Unit
P.O. Box 29535
Raleigh, NC 27626-0535
Re: Cashiers WWTP
NC0063321
Comm. No. 1457P
Dear Mr. Weaver:
Wm. James Jones
Michael S. Agee
Steven A Campbell
J. Michael Daugherty. Jr.
Kyle D. Austin
The Tuckaseigee Water and Sewer Authority has proposed to construct a second complete treatment unit at
the existing Cashiers Wastewater Treatment Plant in Cashiers. The unit will include a new 100,000 gallon package
plant, a new clarifier, a new sand filter, and a new office building. The upgrade will provide dual trains for the
present treatment process. The purpose of the upgrade is to increase the hydraulic treatment capacity to the
permitted flow of 200,000 gallons per day.
The authority is presently pursuing funding for expanding the plant. During peak flows the plant presently
washes out solids. The new expansion will serve to provide additional hydraulic capacity thereby avoiding plant
workouts.
The design calculations are enclosed along with three sets of plans and specifications. Also, enclosed is a
application fee of $200.00 and a copy of the agreement between the owner and engineer authorizing the design of
the project. By this letter the Authority is requesting an authorization to construct the new upgrade.
Should you have any questions please feel free to contact me.
Very truly yours,
MATTERN & CRAIG, INC.
WJJ/rm
cc: Jerry King
Wm. Jam Jones, P.E.
Principal
C:\WP WIN60\WPDOCS11457P-2.LTR
72 Wall Street, P.O. Box 240, Asheville, North Carolina 28802
[phone] Fax [phone]

AMENDMENT TO
STANDARD FORM OF AGREEMENT
BETWEEN
OWNER AND ENGINEER
FOR PROFESSIONAL SERVICES
Exhibit A
SECTION A2 - BASIC SERVICES OF ENGINEER
Paragraph A2.0 General
ADD; Project No. 4
Project 4 will expand permitted treatment capacity of Cashiers wastewater treatment plant from
100,000 gpd to 200,000 gpd.
The existing major treatment plant units will be paralleled utilizing a new 100,000 gpd package
plant, a new circular clarifier and new tertiary sand filters all similar to the existing. The emergency
generator will also be upgraded. -21
.11
ADD; 2.0.1.4. Provide field surveys for design purposes on Project No. 4.
ADD; A2.1 Study and Report Phase
ADD; 2.1.4. Engineer will prepare a report for the Cashiers Wastewater Treatment Plant to expand
from a design capacity of 100,000 gpd to 200,000 gpd.
ADD; 2.1.5. Prepare a report (the "Report") which will contain the statement of OWNER's
requirements for the Project and, as appropriate, will contain schematic layouts, sketches and
conceptual design criteria with appropriate exhibits to indicate the considerations involved and
those alternate solutions available to OWNER which ENGINEER recommends. This Report will
be accompanied by ENGINEER's opinion of Total Project Costs for each solution which is so
recommended for the Project, including the following which will be separately itemized: opinion
of probable Construction Cost, allowances for contingencies and for the estimated total costs of
design professional and related services provided by ENGINEER and, on the basis of information
furnished by OWNER, allowances for other items and services included within the definition of
Total Project Costs.
ADD; 2.1.6. Furnish the Report to and review it with OWNER.
ADD; 2.1.7. Revise the Report in response to OWNER's comments, as appropriate, and furnish
final copies of the Report in the number set forth in Exhibit A.
Page 1 of 3
C:IWPWIN601PROJECTS1l457P.WPD

ADD; 2.1.8. Submit the Report within the stipulated period indicated in Exhibit A.
ADD; 2.1.9. ENGINEER's services under the Study and Report Phase will be considered
complete at the earlier of (1) the date when the Report has been accepted by OWNER or (2) thirty
days after the date when such Report is delivered to OWNER for fmal acceptance, plus in each
case such additional time as may be considered reasonable for obtaining approval of governmental
authorities having jurisdiction to review the portions of the Project designed or specified by
ENGINEER, if such approval is to be obtained during the Study and Report Phase.
ADD; 2.1.10. The Study and Report Phase documentation will be submitted to Owner within 30
days following written Authorization from owner to Engineer to proceed with the study and Report
Phase services on Project No. 4.
ADD; A2.2. Preliminary Design Phase
ADD; A2.2.5.3. The preliminary design documentation for Project No. 4 will be submitted to
Owner within 45 calendar days following written Authorization from Owner to Engineer to proceed
with the Preliminary Design Phase services.
ADD; A2.3 Final Design Phase
ADD; A2.3.6.3. The Contract Documents for Project No. 4 will be submitted to the Owner within
60 calendar days following written authorization from Owner to Engineer to proceed with the final
Design Phase services.
ADD; A.2.3.8.1. The number of prime contracts in this Agreement is increased to four.
ADD; A.2.4. Bidding and Negotiating Phase
ADD; A2.4.1. The Bidding and Negotiation Phase services for Project No. 4 are not required as part
of this amendment.
ADD; A.2.5. Construction Phase
ADD; A.2.5.16. The Construction Phase services for Project No. 4 are not required as part of this
amendment.
Exhibit B
SECTION B6 PAYMENTS TO ENGINEER
Paragraph B6.1 Methods of Payment for Services and Expenses of Engineer
Page 2 of 3
C:IWPWIN601PROJECTS11457P.WPD

under B6.1.1.2 ADD; A total fee of for all services of Engineer billed monthly based on
Engineers estimate of percent of work complete for Project No. 4.
OWNER:
Tuc
By:
and Sewer Authority
Title: ' xecutive Ditor
Date: 9-#0 -54
ENGINEER:
Mattern & Craig, Inc.
By: l/✓i
Title: Princ'.
Date:
pal
9
Page 3 of 3
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