SW6191001_Emails_20200604

Farkas, Jim J
From:Farkas, Jim J
Sent:Thursday, June 4, 2020 10:45 AM
To:Lars Godwin; Jonathan Weathers
Subject:RE: Fwd: \[External\] Re: Yard Storage, Inc. - SW6191001
Lars,

Ensure that the design meets Sand Filter MDC 4 (a sand filter can’t pond more than 6 feet of water above the sand
surface) and Sand Filter MDC 8 (the sand filter must maintain a drawdown rate of at least 2 inches per hour).

We don’t have an attenuation factor to use for sand filters, but the outlet flow rate should be able to be calculated using
the infiltration rate of the sand filter media and Darcy’s Law (Alternatively, you can conservatively assume that the
outflow rate is the same as the inflow rate).

If the peak 10-year flowrate is lower than 3 cfs, you may not need outlet protection. You can calculate the velocity that
the peak 10-year flowrate will produce in the downstream channel (using Manning’s equation:
https://files.nc.gov/ncdeq/Energy%20Mineral%20and%20Land%20Resources/Stormwater/BMP%20Manual/B%20%20St
ormwater%20Calculations.pdf). If this is less than the maximum permissible velocity (Table 1:
https://files.nc.gov/ncdeq/Energy%20Mineral%20and%20Land%20Resources/Stormwater/BMP%20Manual/C-
11_Treatment_Swale.pdf) then no outlet protection is needed since the peak flow is non-erosive (If this is the case, just
provide the calculations showing that the downstream channel will remain stable during the 10-year peak flow).

If you rather, you can use the New York DOT Dissipator Method (Page 153:
https://files.nc.gov/ncdeq/Energy%20Mineral%20and%20Land%20Resources/Land%20Resources/Land%20Quality/Erosi
on%20and%20Sediment%20Control%20Planning%20and%20Design%20Manual/Chapter%208/Chapter%208_rev%20Ma
y%202013.pdf)

-Jim

From: Lars Godwin <[e-mail]>
Sent: Thursday, June 4, 2020 8:52 AM
To: Farkas, Jim J <[e-mail]>; Jonathan Weathers <[e-mail]>
Subject: Re: Fwd: \[External\] Re: Yard Storage, Inc. - SW6191001

CAUTION: External email. Do not click links or open attachments unless you verify. Send all suspicious email as an attachment to
[e-mail]

Jim:
I cannot find an explanation for what happens at 0 to 3 cfs on these charts. The minimum size of a velocity dissipator is
not 20 feet wide at the tail of the apron. Also the sand filter is designed to drain over a 48 hour period and the discharge
will not be the same as with open pipe flow. Is there an attenuation factor for this reduced flow rate from a sand filter ?
On 6/2/2020 3:38 PM, Jonathan Weathers wrote:
Please see below and attached

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Get Outlook for Android \[aka.ms\]

From: Farkas, Jim J <[e-mail]>
Sent: Monday, June 1, 2020 1:29:39 PM
To: Jonathan Weathers <[e-mail]>
Subject: RE: \[External\] Re: Yard Storage, Inc. - SW6191001

I’m working remotely for the time being so I did not get/cannot check my voicemail.

Generally, what we look for in the riprap sizing calculations is the following:
 Provide calculations for the peak 10-year flowrate.
o Generally calculated using the Rational Method (Q=CiA), but can also use routing for
riprap downstream of a SCM outlet (Sand filters generally pass stormwater through
fairly quickly so routing the 10-year storm through the facility to potentially reduce the
size of the riprap apron probably isn’t “worth it”, but feel free to do that if you like).
o For drainage areas with multiple land uses/hydrologic soil groups, show how the
composite C value is calculated for the drainage area.
o Show how the time of concentration is calculated as it is needed (in conjunction with
NOAA rainfall data) to determine the rainfall intensity, i.
 Using the 10-year peak flow rate, outlet pipe size, and tailwater conditions, either Figure 8.06a
or Figure 8.06b of the E&SC Design Manual (Attached) can be used to determine the riprap
sizing required (Feel free to use any other design methodology for energy dissipation design. If
you are, just make a note of it in the report). The information on those figures shouldn’t be
extrapolated so if the chart shows that no riprap is needed, just show that in the calculations.
I’ve also attached an example of how to use the chart (Assuming the 10-year peak flowrate is
100 cfs and the outlet pipe is 30 inches in diameter).

If I didn’t answer your question or if you have any further questions, please feel free to reach out to me
via email.

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.

2

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.

From: Jonathan Weathers <[e-mail]>
Sent: Monday, June 1, 2020 12:51 PM
To: Farkas, Jim J <[e-mail]>
Subject: RE: \[External\] Re: Yard Storage, Inc. - SW6191001

CAUTION: External email. Do not click links or open attachments unless you verify. Send all suspicious email as an
attachment to [e-mail]

Hey Jim, and Happy Monday! I am reaching out to see if you got the messages from my engineer Lars
Godwin? We want to clarify something on the riprap calculations before we submit back to you. If case
you didn’t get his contact information I will put it below. Thank you for your time and help with this.

Lars Godwin
919-961-8561

From: Farkas, Jim J \[mailto:[e-mail]\]
Sent: Tuesday, May 12, 2020 7:35 AM
To: Jonathan Weathers
Subject: RE: \[External\] Re: Yard Storage, Inc. - SW6191001

Sure thing.

-Jim

From: Jonathan Weathers <[e-mail]>
Sent: Monday, May 11, 2020 5:00 PM
To: Farkas, Jim J <[e-mail]>
Subject: Re: \[External\] Re: Yard Storage, Inc. - SW6191001

CAUTION: External email. Do not click links or open attachments unless you verify. Send all suspicious email as an
attachment to [e-mail]

Hey Jim thanks for reaching out. We have the corrections done and are reviewing at this time
and we'll be putting our package together for resubmittal. If you could possibly give us until the
end of this month at the latest to get everything printed and back in your hands.
Get Outlook for Android \[aka.ms\]

From: Farkas, Jim J <[e-mail]>
Sent: Monday, May 11, 2020 9:22:33 AM
To: Jonathan Weathers <[e-mail]>
Subject: RE: \[External\] Re: Yard Storage, Inc. - SW6191001

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Good Morning,

Per the request for additional information letter sent on April 9, 2020, the resubmittal for this project
was due on May 8, 2020. Due to the current Covid-19 situation, we are being a little more flexible with
our due dates. If you would like an extension, please reply to this email with the anticipated resubmittal
date. Failure to respond to this email by close of business on Friday, May 15, 2020 will result in the
project being returned as incomplete (If you submit the requested information before 5/15/20, that
would also be acceptable).

Please let me know if you have any questions.

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.

From: Farkas, Jim J <[e-mail]>
Sent: Monday, April 13, 2020 8:22 AM
To: Jonathan Weathers <[e-mail]>
Subject: Re: \[External\] Re: Yard Storage, Inc. - SW6191001

Yes, we’re still open for business.

Jim Farkas
Environmental Engineer
North Carolina Department of Environmental Quality
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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.

From: Jonathan Weathers <[e-mail]>
Sent: Thursday, April 9, 2020 3:19 PM
To: Farkas, Jim J <[e-mail]>
Subject: RE: \[External\] Re: Yard Storage, Inc. - SW6191001

CAUTION: External email. Do not click links or open attachments unless you verify. Send all suspicious email as an
attachment to [e-mail]

Hey Jim, I hope that you are doing well and staying safe through this COVID-19 situation. I wanted to
reach out and see if plans were at this time still being reviewed? Thanks and take care!

From: Farkas, Jim J \[mailto:[e-mail]\]
Sent: Monday, March 16, 2020 8:11 AM
To: Jonathan Weathers
Subject: RE: \[External\] Re: Yard Storage, Inc. - SW6191001

Yep, we got it.

From: Jonathan Weathers <[e-mail]>
Sent: Friday, March 13, 2020 4:10 PM
To: Farkas, Jim J <[e-mail]>
Subject: RE: \[External\] Re: Yard Storage, Inc. - SW6191001

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CAUTION: External email. Do not click links or open attachments unless you verify. Send all suspicious email as an
attachment to [e-mail]

Hey Jim, I just wanted to touch base and make sure that you did get the updated package that we
nd
dropped off on Monday the 2. No rushing any response, but I wanted to make sure that you did get
the updated package for you review. Thanks

From: Farkas, Jim J \[mailto:[e-mail]\]
Sent: Thursday, February 27, 2020 10:26 AM
To: Jonathan Weathers; [e-mail]
Subject: RE: \[External\] Re: Yard Storage, Inc. - SW6191001

OK, sounds good, I’ll keep an eye out for the submission.

-Jim

From: Jonathan Weathers <[e-mail]>
Sent: Thursday, February 27, 2020 10:24 AM
To: [e-mail]; Farkas, Jim J <[e-mail]>
Subject: Re: \[External\] Re: Yard Storage, Inc. - SW6191001

CAUTION: External email. Do not click links or open attachments unless you verify. Send all suspicious email as an
attachment to [e-mail]

Hey Jim, our plan is to get all the documentation back together and notarized to reflect the new
sand filter system that we are presenting. Should have this delivered to you on Monday
Get Outlook for Android \[aka.ms\]

From: Farkas, Jim J <[e-mail]>
Sent: Thursday, February 27, 2020 9:46:31 AM
To: Jonathan Weathers <[e-mail]>; [e-mail] <[e-mail]>
Subject: RE: \[External\] Re: Yard Storage, Inc. - SW6191001

What’s the status of the resubmittal for this project?

Thanks,
-Jim

From: Jonathan Weathers <[e-mail]>
Sent: Thursday, November 7, 2019 2:45 PM
To: Farkas, Jim J <[e-mail]>
Subject: \[External\] Re: Yard Storage, Inc. - SW6191001

CAUTION: External email. Do not click links or open attachments unless you verify. Send all suspicious email as an
attachment to [e-mail]

No problem Jim, We'll get right on it. Thanks for sending the information to me.
Get Outlook for Android \[aka.ms\]
6

From: Farkas, Jim J <[e-mail]>
Sent: Thursday, November 7, 2019 2:40:58 PM
To: [e-mail] <[e-mail]>
Subject: FW: Yard Storage, Inc. - SW6191001

Sorry, I forgot to send this off to you yesterday.

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

512 N. Sailsbury 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.

From: Farkas, Jim J
Sent: Wednesday, November 6, 2019 4:00 PM
To: [e-mail]
Cc: Lawyer, Mike <[e-mail]>
Subject: Yard Storage, Inc. - SW6191001

Good Afternoon,
The Division of Energy, Mineral and Land Resources (DEMLR), received a Stormwater Management
th
Permit Application for the subject project on October 7, 2019. 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

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512 N. Sailsbury 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.

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