SW6220703_Email_20221115

Peck, Kaitlin
From:Farkas, Jim J
Sent:Tuesday, November 15, 2022 11:59 AM
To:[e-mail]
Cc:[e-mail]
Subject:RE: SW6220703 Magnolia Hills Subdivision
Scott,

I was looking over the additional information you provided on 10/28/2022. Everything looks good except for a few small
issues:

Please correct the following:
- General:
o The provided swale velocity & flow depth information shown in the Supplement-EZ Form should reflect
the permanent design conditions, not on the temporary matting. For example, the provided calculations
show the unreinforced vegetated swale #2 as having a 10-year design flow of 3.65 fps, however the
Supplement-EZ Swale Table shows the actual velocity of this swale as 5.69 fps (based on the calculations
for the temporary C125 matting). Please revise the Vallowable, Vactual, F Depth, Liner, & SF columns in
the table to reflect the permanent design conditions.
- Vegetated Conveyance Design:
o Please provide a source for the allowable velocities of the vegetated conveyances if using values other
than those found in Part C-11 of the Manual.
o The slope of Swale #1 is shown to be 3.0% in the Swale Table of the Supplement-EZ Form and 0.7% in
the calculations. Please revise as needed.
- Supplement-EZ Form:
o Low-Density Page:
 Revise as needed in accordance with the earlier comments.

Please provide the following:
- 1x hard copy & 1x electronic copy of the revised swale velocity calculations (as needed).
- 1x hard copy & 1x electronic copy of the revised pages of the Supplement-EZ Form.
- 2x hard copies & 1x electronic copy of the revised plan sheets (as needed).
- 1x hard copy (2x hard copies for plan sheets) & 1x electronic copy of anything else needed to address the above
comments.

Hard copies should be mailed to me at the following address:
For FedEx/UPS:
Jim Farkas
512 N. Salisbury Street, Office 640M
Raleigh, NC 27604

For USPS:
Jim Farkas
1612 Mail Service Center
Raleigh, NC 27699-1612

Hand Delivery:
1

Please reach out to me prior to hand delivering a submission to make sure that I (or someone else in my group)
will be able to receive the submission. Do not leave the package in the foyer with the security guard.

NOTE: Hard copies should not be sent to a Regional Office. Doing so will delay the review process and the
submission package may be lost while being sent from the Regional Office to me in the Central Office.

Electronic copies should be uploaded at the following location:
https://edocs.deq.nc.gov/Forms/SW-Supplemental-Upload

Since these are really minor things, once I get the hard copies, anything else that may have changed from addressing
these issues, and the documents are uploaded to Laserfiche (Provided everything is still in order), we can issue the
permit without doing another formal review.

Let me know if you have any questions.

Jim Farkas
State Stormwater Engineer
North Carolina Department of Environmental Quality
Office: [phone]
[e-mail]

From: Farkas, Jim J
Sent: Wednesday, September 28, 2022 3:48 PM
To: [e-mail]
Cc: [e-mail]
Subject: RE: SW6220703 Magnolia Hills Subdivision

Scott,

I was looking over the additional information you provided on 7/5/2022. Everything looks good except for a few small
issues:

Please correct the following:
- General:
o The swale velocity calculations were not provided. The swale velocities were provided in the swale
design table of the Supplement-EZ Form (as a separate sheet), but the calculations showing how the
velocities were determined (specifically which Manning’s “n” values were used) was not provided.
Please provide these calculations so that the velocity values can be verified. Please note that the “n”
value should be based on the permanent design conditions, not on the temporary matting.
o Electronic files for all of the calculations were not provided.
- Vegetated Conveyance Design:
2

o Some of the ditches (1, 2, 3, 13, 19, 27, & 37) have an actual velocity that is larger than the Vallowable
value shown for these ditches (for example, Ditch #1 has a Vallowable of 5.0 fps and a Vactual of 8.06
fps). Please revise as needed.
o Please ensure that the ditches that are discharging to wetland areas do so at a non-erosive velocity (2.0
fps for wetlands).
o The ditch detail on plan sheet C-6.0 indicates to “see plans” for the bottom width of the ditches. I didn’t
see the ditch bottom widths shown in the plans. Please ensure that this information is specified in the
plans.
- Application:
o Section IV, 8 & 10 – The %BUA value appears to be incorrect (885,648 sf of New BUA / 5,044,684 sf of
Project Area = 17.6% BUA not 17.8% BUA). Please revise as needed.
- Supplement-EZ Form:
o Drainage Area Page:
 Lines 5 & 6 – Please use the project area (115.81 ac/5,044,684 sf) instead of the property area
and please show this value in square feet, instead of acres.
o Low-Density Page:
 Line 5 – Per the provided swale design table, the maximum velocity in the ditches during the 10-
year design storm is 8.06 fps (Ditch #1). Please revise as needed.

Please provide the following:
- 1x hard copy & 1x electronic copy of the swale velocity calculations.
- 1x electronic copy of all of the other calculations.
- 1x hard copy & 1x electronic copy of the revised pages of the Application.
- 1x hard copy & 1x electronic copy of the revised pages of the Supplement-EZ Form.
- 2x hard copies & 1x electronic copy of the revised plan sheets (as needed).
- 1x hard copy (2x hard copies for plan sheets) & 1x electronic copy of anything else needed to address the above
comments.

Hard copies should be mailed to me at the following address:
For FedEx/UPS:
Jim Farkas
512 N. Salisbury Street, Office 640M
Raleigh, NC 27604

For USPS:
Jim Farkas
1612 Mail Service Center
Raleigh, NC 27699-1612

Hand Delivery:
Please reach out to me prior to hand delivering a submission to make sure that I (or someone else in my group)
will be able to receive the submission. Do not leave the package in the foyer with the security guard.

NOTE: Hard copies should not be sent to a Regional Office. Doing so will delay the review process and the
submission package may be lost while being sent from the Regional Office to me in the Central Office.

Electronic copies should be uploaded at the following location:
https://edocs.deq.nc.gov/Forms/SW-Supplemental-Upload

Since these are really minor things, once I get the hard copies, anything else that may have changed from addressing
these issues, and the documents are uploaded to Laserfiche (Provided everything is still in order), we can issue the
permit without doing another formal review.
3

Let me know if you have any questions.

Jim Farkas
State Stormwater Engineer
North Carolina Department of Environmental Quality
Office: [phone]
[e-mail]

From: Tran, Kieu M <[e-mail]>
Sent: Wednesday, July 13, 2022 4:12 PM
To: [e-mail]; [e-mail]
Cc: Farkas, Jim J <[e-mail]>; Lawyer, Mike <[e-mail]>
Subject: SW6220703 Magnolia Hills Subdivision

Good afternoon,

We received your post-construction stormwater permit application for the above mentioned project on 7/5/2022.
Reviews under the standard permitting process generally take 45 calendar days, but can take up to 90 calendar days per
statute (our other reviewer, Corey Anen, no longer works for the State, so this review may exceed 45 days). Please
upload all documents that you mailed into our office through the link provided below. Be sure to choose the Central
Office as the Primary Contact office.

https://edocs.deq.nc.gov/Forms/SW-Supplemental-Upload

IMPORTANT NOTE: Please ensure that each file is uploaded under its appropriate file type. Additional file types can be
entered into the electronic form by clicking on the “Add Another Post-Construction File Upload” link directly below the
“State Stormwater Information Uploads” section of the form. Please do not upload entire plan sets through this form,
but rather upload the relevant individual sheets under the appropriate file type. Selecting the correct file type ensures
that the files are properly named in the electronic repository and it helps expedite the review process.

Please type in permit #: SW6220703

If you have any questions, please contact Jim Farkas [e-mail] 919-707-3646.

Thank you,

Mrs. Kieu Tran
Stormwater Program Administrative Assistant
Office: (919) 707- 3640
[e-mail]

4

North Carolina Department of Environmental Quality
Division of Energy, Mineral, and Land Resources Stormwater Program

512 N. Salisbury Street, Raleigh, NC 27604 (location)
1612 Mail Service Center, Raleigh, NC 27699-1612 (mailing)
Website: http://deq.nc.gov/about/divisions/energy-mineral-land-resources/stormwater

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

5