SW3220301_Email_20220510

Farkas, Jim J
From:Farkas, Jim J
Sent:Tuesday, May 10, 2022 2:26 PM
To:[e-mail]
Cc:[e-mail]
Subject:RE: SW3220301 Mini Storage USA, Inc- Mini Warehouse Project
Kevin,

I was looking over the information you provided on 3/2/2022. Everything looks good except for a few small issues:

Please correct the following:
- General MDC 4 – Please provide calculations showing that the riprap at the outlet of the proposed SCM is
adequately sized top prevent erosion during the 10-year design storm. It is noted that the riprap sizing
specifications are provided on plan sheet 7, however the calculations appear to be missing.
- Sand Filter MDC 2 – Sand Filter MDC 2 requires that the provided storage volume in the sand chamber and
sediment chamber be equivalent. Per the provided information, the sand chamber has a provided storage
volume of 780 cf and the sediment chamber has a provided storage volume of 3,336 cf. Please revise the design
and submittal materials as needed. NOTE: The other aspects of the sand filter design were acceptable with
regard to the MDCs.
- Application, Section VI, 8 – The percent impervious area of the entire project area does not appear to be
calculated correctly (it should correspond to the %BUA as shown in the Entire Site Column of the Drainage Area
Page of the Supplement-EZ Form, not the %BUA of the drainage area to the SCM).
- Supplement-EZ Form:
o Cover Page:
 Lines 7-10 – Please complete these items. It is noted that there are no surface waters located
on-site, however, Line 7 should still list the required with of the vegetated setback in this part of
the State (30’). The other items can be “N/a” if they are not applicable.
o Drainage Areas Page:
 Entire Site Column, Lines 4, 19, 20, & 21 – These items are not required for the entire site
column.
 Drainage Area 1 Column, Line 20 – Please use the adjusted WQV (3,403 cf) for this value (since
that is the volume that must be provided in the sand filter). You may add a note to this item
indicating that this is the adjusted WQV and include the unadjusted WQV value if you like.
o Sand Filter Page:
 Line 5 – Please answer this item. It refers to the side slopes of the vegetated slopes of the SCM.
 Line 18 (Optional) – You can express this item as “<553.5’” since the SHWT was not encountered
above this elevation, but this change is not required since you explained this in the provided
note (The provided notes are appreciated).
 Line 31 – The “bottom” of the sand chamber is not the excavated bottom of the sand chamber,
but rather the top of the sand layer (or in this case, the top of the #89 aggregate on top of the
sand layer, 557.8’).
 NOTE: Lines 23, 26, 30, & 32 will also need to be modified in accordance with the earlier
comments.

While not required, the following revisions are recommended:
- Reduce the side slopes of the bypass ditched to no more than 3:1. This will help improve the stability of the
ditches in perpetuity and will allow for easier maintenance of the ditches (most ride-on lawnmowers cannot
traverse slopes steeper than 3:1).
1

Please provide the following:
- 1x hard copy & 1x electronic copy of the riprap sizing calculations.
- 1x hard copy & 1x electronic copy of the revised page of the Application.
- 1x hard copy & 1x electronic copy of the revised Supplement-EZ Form.
- 1x hard copy (2x hard copies of plan sheets) & 1x electronic copy of any submission items impacted by the Sand
Filter MDC 2 comment.

Hard copies should be mailed to me at the following address:
For FedEx/UPS:
Jim Farkas
512 N. Salisbury Street, Office 640E
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 45 day review.

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]

2

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: Tran, Kieu M <[e-mail]>
Sent: Wednesday, April 20, 2022 2:31 PM
To: [e-mail]; [e-mail]
Cc: Farkas, Jim J <[e-mail]>; Khan, Zahid <[e-mail]>
Subject: SW3220301 Mini Storage USA, Inc- Mini Warehouse Project

Good afternoon,

We received your post-construction stormwater permit application for the above mentioned project on 03/02/2022.
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 #: SW3220301

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]

North Carolina Department of Environmental Quality
3

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

4