NC0057193_correspondence_20240229

Weaver, Charles
From: Tuvia, Ori A
Sent: Thursday, February 29, 2024 8:10 AM
To: Weaver, Charles; 'Johnny Armstrong'
Cc: Andrew Stanfield
Subject: RE: [External] Nantahala Outdoor Center WWP - replacing existing WWTP
Good morning,
From what I understand sounds like you are proposing to change the type of treatment system, which would require an
ATC permit, and reduce the treatment capacity below the facility permitted amount which is not allowed (unless you
modify you permit reduce the permitted flow). Also keep in mind that in accordance with ATC minimum design
"The following unit processes require multiple components, sized to hydraulically pass
the peak hourly flow with one component out of service:
i.Preliminary/Primary Treatment:
➢Bar screens A a mechanical bar screen is utilized, a manual bar screen may serve
as the dual component only if an automatic bypass of the mechanical bar screen is
provided
Primary clarifiers
ii.Secondary/Tertiary Treatment:
➢Biological treatment units
➢Secondary clarifiers
Tertiary filters"
Sincerely ,
Ori
From: Weaver, Charles
Sent: Thursday, February 29, 2024 7:26 AM
To: 'Johnny Armstrong' <[e-mail]>; Tuvia, Ori A <[e-mail]>
Cc: Andrew Stanfield <[e-mail]>
Subject: RE: [External] Nantahala Outdoor Center WWP - replacing existing WWTP
Johnny — I'm sending your question to Ori Tuvia, who oversees the Authorization to Construct permits for our program. I
don't know the answer to your question but I believe he will.
Ori — see the email chain below. This facility wants to replace their existing WWTP with no change in permitted
capacity. However, the proposed replacement would be smaller than their existing plant. Would this require an AtC? I
know that in the past replacing components like -for -like didn't require an AtC, but this is not exactly like -for -like. I'd
appreciate your help with this. Please respond to Mr. Armstrong and copy me [so I won't have to ask you this in the
future].
Thanks!
i

Charles H. Weaver
Environmental Specialist II
Division of Water Resources
919-707-3616
charles.weaverCcDdeg. nc. qov
(mailing address) 1617 Mail Service Center, Raleigh, NC 27699-1617
,E
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From: Johnny Armstrong <[e-mail]>
Sent: Wednesday, February 28, 2024 3:27 PM
To: Weaver, Charles <charles.weaver@deg. nc.gov>
Cc: Andrew Stanfield <[e-mail]>
Subject: RE: [External] Nantahala Outdoor Center WWP
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I 'm sorry to keep bothering you with questions. Right now, we are permitted for 40k a day. Our current average is 4k a
day. Max daily was around 10k and that was for approximately a 3-day period. The plant that was suggested us , is a
MBR system that can be added onto over time. The company says we can put in enough to do 12k a day since that is
more than our daily flow and it will be fine because we could add on as we needed more. If we stay at 40k a day permit,
will we have to install enough of the filter system to do 40k or the 12k that is above our average flow ?
From: Weaver, Charles <[e-mail]>
Sent: Wednesday, February 28, 2024 10:57 AM
To: Johnny Armstrong <[e-mail]>
Subject: RE: [External] Nantahala Outdoor Center WWP
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Charles H. Weaver
Environmental Specialist II
Division of Water Resources
919-707-3616
charles.weaverCcDdeg. nc. qov
(mailing address) 1617 Mail Service Center, Raleigh, NC 27699-1617

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Carobna Pvblrc Records Law and may be drsabsed to thrrd parties,
From: Johnny Armstrong <[e-mail]>
Sent: Wednesday, February 28, 2024 10:48 AM
To: Weaver, Charles <[e-mail]>
Subject: RE: [External] Nantahala Outdoor Center WWP
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If we just replace the equipment, we currently have with the same equipment do we need the ATC permit. The only
thing that would be different is the new equipment has sensors that will help us monitor more closely than what we
have now.
From: Weaver, Charles <[e-mail]>
Sent: Thursday, February 22, 2024 8:34 AM
To: Johnny Armstrong <[e-mail]>
Cc: Rose, Rachel F <[e-mail]>; Andrew Stanfield <[e-mail]>
Subject: RE: [External] Nantahala Outdoor Center WWP
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If you wish to replace the existing facilities with a new WWTP of the same capacity, your NPDES permit does not need to
be modified.
If you wish to have increased flow, a new (modified) permit must be issued prior to construction of the WWTP. This will
take at least 180 days to permit, as a new model must be run and new limits must be developed. You will also need to
submit an Engineering Alternatives Analysis in support of the request for expanded flow. The EAA guidance document is
attached for your review.
In either scenario described above, you will need an Authorization to Construct permit prior to installing the new
WWTP. Instructions on how to apply for an AtC permit can be found here:
https://www.deg.nc.gov/about/divisions/water-resources/permitting/npdes-wastewater/npdes-authorization-construct
Let me know if you have additional questions.
Charles H. Weaver
Environmental Specialist II
Division of Water Resources
919-707-3616
charles.weaver(a)deg. nc. gov
(mailing address) 1617 Mail Service Center, Raleigh, NC 27699-1617

PmaJ correspondence to and from this address is subject to Me J�orfh
Carobna Pvblrc Records Law and may be drsabsed to thrrd parties,
From: Johnny Armstrong <[e-mail]>
Sent: Thursday, February 22, 2024 8:24 AM
To: Weaver, Charles <charles.weaver@deg. nc.gov>
Cc: Rose, Rachel F <[e-mail]>; Andrew Stanfield <[e-mail]>
Subject: [External] Nantahala Outdoor Center WWP
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Mr Weaver
We are looking at upgrading out wastewater plant. We currently have a SBR system. The center is looking
into a MBR system that is a little different and has the ability to be expanded. My question is do we have to get a new
permit or will our current permit work for this style plant. Our current permit number is NC0057193.
Johnny Armstrong
Facilities Manager
Nantahala Outdoor Center
13077 Hwy 19W. I Bryson City, NC 28713
Office: [phone]
NC
No,NUHMA{'AJU X}fl CEN1ER
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