SW3210101_Add Info Request_202100226

ROY COOPER
Governor
MICHAEL S. REGAN
Secretary
BRIAN WRENN
Director
Michael Duval, PE
McAdams
3430 Toringdon Way, Suite 110
Charlotte, NC 28277
NORTH CAROLINA
Environmental Quality
February 26, 2020
Subject: Request for Additional Information
Stormwater Permit No. SW3210101
The Glenns
Union County
Dear Mr. Duval:
The Division of Energy, Mineral and Land Resources (DEMLR), received a Stormwater
Management Permit Major Modification Application for the subject project on January 5, 2021.
A review of that information has determined that the application is not complete. The following
information is needed to continue the stormwater review:
1. Please revise the SWU-101 Application to address the following comments:
a. Please enter the name and title of the signing official for the applicant. Please
note that the signing official muse be a principal executive officer of the level of
vice president or an authorized representative [15A NCAC 02H .1040(1)].
b. Please provide documentation from the NC Secretary of State or other official
documentation stating that the signing official for the property owner meets the
signatory requirements above.
c. Please provide a phone number and email address for the property owner.
d. The Property Owner Authorization was not complete. Please fill in all fields and
submit a newly signed copy.
e. Please complete the Applicant Certification. This is required for all permit
applications.
2. On the existing conditions plan, please show the boundaries of all surface waters,
wetlands, regulatory flood zones, protected vegetated setbacks and protected riparian
buffers or a note that none exist [15A NCAC 02H .1042(2)(g)(iii)].
The scale on Sheet C3.00 appears incorrect. It currently says 1" = 80', but appears to be
at the same scale as Sheet C2.00 (1" = 100').
4. Please show a maintenance access and easement on the design plans that meets the
requirements of MDC 8 & 9 [15A NCAC 02H. 1050(8) & (9)].
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512 North Salisbury Street 1 1612 Mail Service Center I Raleigh, North Carolina 27699-1612
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5. Please submit an Operation Maintenance Plan and Agreement that meets the
requirements of General MDC 11 and 12 [15A NCAC 02H .1050(11) &
(12), .1042(2)0)]. The O&M EZ form can be used to meet this requirement and can be
found on the Stormwater Design Manual website.
6. Please submit a Supplement EZ form with the design data for the site. The Supplement
EZ form can be found on the Stormwater Design Manual website.
7. Please submit a deed restriction form [15A NCAC 02H .1003(7)]. A sample form can be
found on the Post -construction Stormwater Forms website.
8. Please address the following comments regarding the sand filter:
a. Sand Filter MDC 1 requires a separation distance of two feet from the bottom of
the system. Please submit a geotechnical report showing that the required
separation is provided [15A NCAC 02H .1056(1)].
b. The calculations used to size the sand filter are from an old version of the
Stormwater Design Manual and do not meet the current MDC. According to
MDC 2 and 3, the sand chamber must be sized to store at least half of the design
volume below the first outlet [15A NCAC 02H .1056(2) & 3].
9. Please address the following comments regarding the wet pond:
a. The stage storage calculations shown in the Stormwater Impact Analysis (Page 65
of the PDF document) are incorrect. The table shows the contour area at El. 575
as less than at El. 574.
b. The water quality elevation and drawdown time were based on the 1-year storm
event, not the 1" storm event. The wet pond must be designed based on the 1"
storm event.
c. The forebay is only 11 % of the main pool volume. Wet pond MDC 5 requires it to
be 15-20% of the main pool volume [15A NCAC 02H. 1053(5)].
10. Provide pdfs of all revisions, 2 hardcopies of revised plan sheets, and 1 hardcopy of other
documents. Pdfs must be uploaded using the form at:
hgps:Hedocs.deg.nc.gov/Forms/SW_Project Submittal
Please note that this request for additional information is in response to a preliminary review.
The requested information should be received by this Office prior to March 28, 2021, or
the application will be returned as incomplete. The return of a project will necessitate
resubmittal of all required items, including the application fee. Please reference the State
assigned project number SW3210101 on all correspondence.
If you need additional time to submit the information, please submit your request for a time
extension to the Division at the contact below. The request must indicate the date by which you
expect to submit the required information. The Division is allowed 90 days from the receipt of
a completed application to issue the permit.

The construction of any impervious surfaces, other than a construction entrance under an
approved Sedimentation Erosion Control Plan, is a violation of NCGS 143-215.1 and is subject
to enforcement action pursuant to NCGS 143-215.6A.
If you have any questions concerning this matter please feel free to contact me at
Corey.Anen&ncdenr.gov or [phone]. Please note that due to the ongoing Covid-19
pandemic, I will be teleworking and will be most easily reached by email.
Sincerely,
Steven Corey Anen, PE
Environmental Engineer
Stormwater Program
cc: Mooresville Regional Office