SW3190201_AddInfo_20190327

ROY COOPER
Governor
MICHAEL S. REGAN
Secretary
S. DAN]EL SMITH
Interim Director
Mr. Daniel Renckens
Bohler Engineering
1927 S. Tyron Street, Suite 310
Charlotte, NC 28203
NORTH CAROLINA
£nvironmentaI Qua[ity
March 27, 2019
Subject: Request for Additional Information
Stormwater Permit No. SW3190201
O'Reilly Auto Parts, Wingate, NC
Union County
Dear Mr. Renckens:
The Division of Energy, Mineral and Land Resources (DEMLR), received a Stormwater
Management Permit Application for the subject project on February 5, 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. The bioretention cell must be sized using a volume based calculation rather than a routing
calculation. Information can be found in Part B of our Stormwater Design Manual.
2. Please correct the following inaccuracies on the Supplement EZ form:
a. The side slopes of the SCM are listed as 2:1 rather than 3:1 as shown on the plan
and required by the MDCs.
b. The Supplement EZ form shows that the depth to the seasonal high water table is
">1.5 feet." According to Bioretention MDC 1, the minimum separation is 2 feet.
c. The surface area listed must be the area at the planted surface of the bioretention
cell.
d. The ponding depth is listed incorrectly.
e. Mulch is not an acceptable form of organic matter for the bioretention media mix.
3. Please submit a USGS map identifying the site location.
4. Please provide calculations showing that the inlet protection for the bioretention cell is
sufficient to prevent erosion from the peak flow during the 10-year storm.
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

5. Please show a maintenance access and easement that meets the requirements of General
MDCs 8 and 9.
6. 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 26, 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 SW3190201 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: Mooresville Regional Office