SW1210901_Email_20220128

Farkas, Jim J
From:Farkas, Jim J
Sent:Friday, January 28, 2022 10:44 AM
To:Dave Skurky
Cc:Aiken, Stan E
Subject:RE: \[External\] RE: SW1210901; Asheville Regional Airport - Parking Lot D
Alaina Morman is in the office today, so you should be able to drop it off with her. I come in to get my mail every now
and then so I’ll pick it up when I do.

-Jim

From: Dave Skurky <[e-mail]>
Sent: Friday, January 28, 2022 10:30 AM
To: Farkas, Jim J <[e-mail]>
Cc: Aiken, Stan E <[e-mail]>
Subject: RE: \[External\] RE: SW1210901; Asheville Regional Airport - Parking Lot D

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Jim,
We’re dropping plans and reports off later today. Your email reply says to notify you.
Is that a problem with remote working? I can drop off at your house if that’s easier

Dave Skurky, PE, CFM | Engineering Services Manager
919.819.4242 | [e-mail]

From: Dave Skurky
Sent: Thursday, January 27, 2022 8:35 AM
To: Farkas, Jim J <[e-mail]>
Cc: Aiken, Stan E <[e-mail]>
Subject: RE: \[External\] RE: SW1210901; Asheville Regional Airport - Parking Lot D

We’re putting everything together now and will get to FedEx today. Should arrive tomorrow or Monday.
Thanks for your help!

Dave Skurky, PE, CFM | Engineering Services Manager
919.819.4242 | [e-mail]

From: Farkas, Jim J <[e-mail]>
Sent: Wednesday, January 19, 2022 3:30 PM
To: Dave Skurky <[e-mail]>
Cc: Aiken, Stan E <[e-mail]>
Subject: RE: \[External\] RE: SW1210901; Asheville Regional Airport - Parking Lot D

OK
1

-Jim

From: Dave Skurky <[e-mail]>
Sent: Wednesday, January 19, 2022 3:30 PM
To: Farkas, Jim J <[e-mail]>
Cc: Aiken, Stan E <[e-mail]>
Subject: RE: \[External\] RE: SW1210901; Asheville Regional Airport - Parking Lot D

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Jim,
We are requesting one more week extension to 1/26/22. Thank you,

Dave Skurky, PE, CFM | Engineering Services Manager
919.819.4242 | [e-mail]

From: Dave Skurky
Sent: Thursday, January 13, 2022 8:29 AM
To: Farkas, Jim J <[e-mail]>
Cc: Aiken, Stan E <[e-mail]>
Subject: RE: \[External\] RE: SW1210901; Asheville Regional Airport - Parking Lot D

Wow thanks so much – great advice! We’ll have it back on 1/19/22. Have a great rest of your week and weekend,

Dave Skurky, PE, CFM | Engineering Services Manager
919.819.4242 | [e-mail]

From: Farkas, Jim J <[e-mail]>
Sent: Thursday, January 13, 2022 8:17 AM
To: Dave Skurky <[e-mail]>
Cc: Aiken, Stan E <[e-mail]>
Subject: RE: \[External\] RE: SW1210901; Asheville Regional Airport - Parking Lot D

Add an explanation for why the wet pond and stormwater wetland can’t be used (something about the standing water
issue/N.C.G.S.143-214.7 (c3)) and it should be good.

Also, with regard to the small orifice, you could have the orifice drawdown from below the water surface elevation of
the small permanent pool near the outlet structure (reducing the amount of floating debris that would get caught in the
orifice) or possibly design the outlet structure to use a weir instead of an orifice (that way, instead of the orifice clogging
and “failing”, the weir would just “clog” an overtop). These things are supposed to be maintained somewhat regularly so
any debris buildup around the orifice/outlet structure should be removed. Most drawdown orifices that I review are
smaller than 3.0 inches (I don’t know, form an owner/operator’s perspective, how well they function, but they are fairly
common).

-Jim

From: Dave Skurky <[e-mail]>
Sent: Wednesday, January 12, 2022 3:09 PM
To: Farkas, Jim J <[e-mail]>
2

Cc: Aiken, Stan E <[e-mail]>
Subject: RE: \[External\] RE: SW1210901; Asheville Regional Airport - Parking Lot D

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Mr. Farkas,
Two questions/requests:

1. Due to shallow bedrock (and therefore SHWT unknown and poor infiltration rate), many Primary SCM’s are
not feasible. Please see list of Primary SCM’s applicable at airports. Before we proceed with the Dry Pond,
can you preliminarily see these rationales and let me know if this suffices before we redesign and update all
our reports, plans, etc.?
Bioretention Cell requires 2ft of separation between its bottom and the SHWT along with a minimum of 2.5ft
of soil underneath the surface layer. According to the soil report, bedrock was found 3ft below the surface.
Therefore, with the required depth of soil and bedrock so shallow beneath the surface, a bioretention cell is
not plausible.

Infiltration System requires 2ft of separation between its bottom and the SHWT. According to the soil report,
bedrock was found 3ft below the surface and a SHWT was not determined. Therefore, only one foot of stone
would be allowed which is insufficient for an adequate infiltration system.

Sand Filter requires 1-2ft of separation between its bottom and the SHWT along with a minimum of 1.5ft of
filter bed + 1ft of sand above the underdrain pipe. According to the soil report, bedrock was found 3ft below
the surface. Therefore, with the required about of filter bed + sand and bedrock so shallow beneath the
surface, a sand filter is not plausible.

Rainwater Harvesting this SCM is infeasible because the proposed project is only a parking lot that does not
include a building, so roof drainage will not occur on the site.

Permeable Pavement is not feasible with the amount of snow at this location. Airport maintenance requires
salts and de-icers for safety precautions. The use of these additives is prohibited and therefore makes
permeable pavement infeasible.

Treatment Swale (Secondary) plausible

Dry Pond (Secondary) plausible

2. The Dry Pond requires a draw down time of 2-5 days. Because our parking lot drainage area is so small
(0.64acres), the 1yr storm volume is < 2,000cf. Drawing that down over 48hrs (or 40hrs according to
Appendix E-4) will require a 0.8” orifice. That seems impractical to have anything that small. We try not to
have orifices less than 3” for clogging purposes, even with track racks. My other idea would be to have 6-9”
of ponding in the dry pond and use the natural infiltration of the underlying soil to calculate the 2-5day draw
down time. What are your thoughts on those two options (<1” orifice vs draw down through natural soil)?

Dave Skurky, PE, CFM | Engineering Services Manager
919.819.4242 | [e-mail]

From: Dave Skurky
Sent: Tuesday, January 11, 2022 8:59 AM
To: Farkas, Jim J <[e-mail]>
3

Cc: Aiken, Stan E <[e-mail]>
Subject: RE: \[External\] RE: SW1210901; Asheville Regional Airport - Parking Lot D

Jim,
I am requesting an extension to 1/19/22 for the above referenced project. We are exploring a treatment swale or
dry pond in lieu of the bioretention and its requiring redesign.

Thanks,

Dave Skurky, PE, CFM | Engineering Services Manager
919.819.4242 | [e-mail]

From: Dave Skurky <[e-mail]>
Sent: Wednesday, January 5, 2022 8:58 AM
To: Farkas, Jim J <[e-mail]>
Cc: Aiken, Stan E <[e-mail]>
Subject: Re: \[External\] RE: SW1210901; Asheville Regional Airport - Parking Lot D

Great thank you

Does partially weathered bedrock at 3ft deep qualify as a hardship for bioretention? We would like explore treatment
swale or dry pond as the SCM in lieu of bioretention

Dave Skurky, PE, CFM | Engineering Services Manager
919.819.4242 | [e-mail]

www.aulickengineering.com

From: Farkas, Jim J <[e-mail]>
Sent: Tuesday, January 4, 2022 12:16:56 PM
To: Dave Skurky <[e-mail]>
Cc: Aiken, Stan E <[e-mail]>
Subject: RE: \[External\] RE: SW1210901; Asheville Regional Airport - Parking Lot D

If you cannot make the resubmission by 1/12/22, please send me an email with the anticipated resubmission date and
we will grant you an extension.

-Jim

From: Dave Skurky <[e-mail]>
Sent: Tuesday, January 4, 2022 12:06 PM
To: Farkas, Jim J <[e-mail]>
Cc: Aiken, Stan E <[e-mail]>
Subject: RE: \[External\] RE: SW1210901; Asheville Regional Airport - Parking Lot D

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Thanks, Jim.
Do we need to have everything addressed and revised by 1/12/22 or just a response? Thanks!

Dave Skurky, PE, CFM | Engineering Services Manager
919.819.4242 | [e-mail]

From: Farkas, Jim J <[e-mail]>
Sent: Tuesday, January 4, 2022 11:08 AM
To: Dave Skurky <[e-mail]>
Cc: Aiken, Stan E <[e-mail]>
Subject: RE: \[External\] RE: SW1210901; Asheville Regional Airport - Parking Lot D

On 10/21/2021, we sent a request for additional information letter to you for the subject project. As of today, we have
not received the requested information back. Please provide this information or request a resubmission deadline
extension by Wednesday, January 12, 2022 or this project will be returned due to inactivity.

Please let me know if you have any questions,

-Jim

From: Farkas, Jim J
Sent: Tuesday, December 28, 2021 8:38 AM
To: Dave Skurky <[e-mail]>
Subject: RE: \[External\] RE: SW1210901; Asheville Regional Airport - Parking Lot D

Yes, but you will need to demonstrate that using a primary SCM is not feasible for the site.

-Jim

From: Dave Skurky <[e-mail]>
Sent: Tuesday, December 28, 2021 8:36 AM
To: Farkas, Jim J <[e-mail]>
Subject: \[External\] RE: SW1210901; Asheville Regional Airport - Parking Lot D

CAUTION: External email. Do not click links or open attachments unless you verify. Send all suspicious email as an attachment to
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Jim,
We’re looking at the SHWT results this week but if we have any issue and cannot get the 2ft separation from bottom
of bioretention to SHWT, we’ll need to explore other SCM options.

According to this table in Appendix E-4, we can use a Treatment Swale or Dry Pond at airports, correct? if we follow
the MDC, then is there anything else needed? Thanks,
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Dave Skurky, PE, CFM | Engineering Services Manager
919.819.4242 | [e-mail]

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From: Farkas, Jim J <[e-mail]>
Sent: Thursday, October 21, 2021 8:32 AM
To: [e-mail]; Dave Skurky <[e-mail]>
Cc: Aiken, Stan E <[e-mail]>
Subject: SW1210901; Asheville Regional Airport - Parking Lot D

Good Morning,
The Division of Energy, Mineral and Land Resources (DEMLR), received a Stormwater Management Permit Application
th
for the subject project on September 14, 2021. A review of that information has determined that the application is not
complete. Attached is a letter describing the items that need to be submitted. If you have any questions, please feel free
to contact me. My contact information is listed below.
Thank you,

Jim Farkas
Environmental Engineer
North Carolina Department of Environmental Quality
Division of Energy, Mineral, & Land Resources – Stormwater Program

512 N. Salisbury Street
1612 Mail Service Center
Raleigh, NC 27699-1612

[phone]
[e-mail]

Email correspondence to and from this address is subject to the
North Carolina Public Records Law and may be disclosed to third parties.

Based on the current guidance to minimize the spread of COVID-19, the Department of Environmental Quality has
adjusted operations to protect the health and safety of the staff and public. Many employees are working remotely or
are on staggered shifts. To accommodate these staffing changes, all DEQ office locations are limiting public access to
appointments only. Please check with the appropriate staff before visiting our offices, as we may be able to handle your
requests by phone or email. We appreciate your patience as we continue to serve the public during this challenging
time.

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