SW1180402_Add Info Request_20180511

Energy, Mineral
and Land Resources
ENVIRONMENTAL QUALITY
May 11, 2018
Mr. Brad Johnson, PE
McGill Associates
55 Broad Street
Asheville, NC 28801
ROY COOPER
Governor
MICHAEL S. REGAN
Secretary
WILLIAM E. TOBY VINSON, JR.
Interim Director
Subject: Request for Additional Information
Stormwater Permit No. SWI 180402
Jo Ellen Ammons Fieldhouse for Mars Hill University — Mars Hill, NC
Madison County
Dear Mr. Johnson:
The Division of Energy, Mineral and Land Resources (DEMLR), received a Stormwater
Management Permit Application for the subject project on April 30, 2018. 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 submit an SWU-101 —State Stormwater Permit Application Form. This form can
be found at: https:Hdeq.nc.gov/about/divisions/energy-mineral-land-resources/energ_y-
mineral-land-rules/stormwater-pro rg am/post-construction.
2. Please use the Discrete NRCS Curve Number Method or Simple Method for calculating
the water quality volume. Using a composite CN yields an artificially lower volume.
General MDC 1 requires the SCM to be sufficiently sized to handle the treatment
volume.
3. Please provide a plan view of the bioretention system on the stormwater plan that labels
inlets, outlets, erosion protection, underdrain pipes, cleanouts, and other significant
features of the system.
4. The drainage area maps should identify pervious and impervious areas in both the
proposed and existing conditions.
5. Please specify on the plans that the vegetation in the bioretention cell should consist of
non -clumping, deep-rooted species.
6. Please specify on the plans that the P -index of the media must be less than 50.

7. General MDC 6 requires that SCMs have a method to drawn down any standing water to
facilitate maintenance and inspection.
8. Revise the plans to show a maintenance access and easement that extend to the nearest
right-of-way. The maintenance access must be at least 10' wide and have side slopes no
steeper than 3:1 (horizontal to vertical). The easement must contain the entire
maintenance access and SCM.
9. Provide pdfs of all revisions, 2 hardcopies of revised plan sheets, and l hardcopy of other
documents. Pdfs must be uploaded using the form at:
hqps:Hedocs.deg.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 June 10, 2018, 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 SW1180402 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
[e-mail] or [phone].
Sincerely,
�& % 64'—
Corey Anen
Environmental Engineer
Stormwater Program
cc: Asheville Regional Office
Donald Edwards – Mars Hill University
Randell N. Tilley – Mars Hill University
Nothing Compares.
State of North Carolina I Environmental Quality I Energy, Mineral and Land Resources
512 N. Salisbury Street 1 1612 Maii Service Center I Raleigh, Nort hCaroiina27699-1612
919 707 9200