SW8190113_AddInfo_20190313

ROY COOPER
Governor
MICHAEL S. REGAN
Secretary
S. DAN]EL SMITH
Interim Director
Mr. David L. Menus, PE
Stroud Engineering, P.A.
102-D Cinema Drive
Wilmington, NC 28403
NORTH CAROLINA
£nvironmentaI Qua[ity
March 13, 2019
Subject: Request for Additional Information
Stormwater Permit No. SW8190113
Bennett Village Apartments
New Hanover County
Dear Mr. Nobles:
The Division of Energy, Mineral and Land Resources (DEMLR), received a Stormwater
Management Permit Application for the subject project on January 25, 2019. A review of that
information has determined that the application is not complete. The following information is
needed to continue the stormwater review:
1. Wet Pond MDC 3: Sediment Storage requires sediment storage to be added after all other
MDC are met. The sediment storage space in the bottom of the wet pond should not be
used in any other volume calculations (e.g., when calculating the average depth for Wet
Pond MDC 2 or the forebay volume percentage for Wet Pond MDC 5).
2. The plans and calculations show the vegetated shelf being submerged; however, the
detail sheet says that it is above the permanent pool. Please revise the sheets so that they
match.
3. A number of storm drainage structures are shown as having inverts at El. 0.0. Please
revise the sheets to show the proposed inverts of these structures.
4. In accordance with General MDC 4, please submit engineering calculations that show
that the inlets to the swales and wet pond and the outlet from the wet pond will not have
erosion during the 10-year storm.
5. Please show a maintenance access and easement for the wet pond that meets the
requirements of General MDCs 8 and 9.
QNorth Carolina Department of Environmental Quality f Division of Energy, Mineral and Land Resources
E512 North Salisbury Street 1 1612 Mat] Service Center Raleigh, North Carolina 27699-1612
NORTH Gi�C.'LIhT �
oevem aMorem�RR�m,lms� r 919.707.9200

6. Please explain what TB 1 and T132 on the grading sheet represent and how the inlets to the
swale will be protected from erosion.
7. 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:
hltps:Hedocs.deq.nc.gov/Forms/SW ProjectSubmittal
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 April 12, 2019, 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 SW8190113 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(cncdenr.gov or [phone].
Sincerely,
Gl9' A ---
Corey Anen
Environmental Engineer
Stormwater Program
cc: Wilmington Regional Office