SW1210601_Add Info Request_20210806

ROY COOPER
Governor
MICHAEL S. REGAN
Secretary
BRIAN WRENN
Director
Daniel Hyatt, PE
Wade Trim
53 N Market Street, Suite #200
Asheville, NC 28801
NORTH CAROLINA
Environmental Quality
August 6, 2021
Subject: Request for Additional Information
Stormwater Permit No. SW1210601
MoJo Storage
Haywood County
Dear Mr. Hyatt:
The Division of Energy, Mineral and Land Resources (DEMLR), received a Stormwater
Management Permit Major Modification Application for the subject project on June 21, 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 provide a geotechnical investigation to ensure that the seasonal high water table
provide enough separation for the permeable pavement to meet the design requirements
(Permeable Pavement MDC 1 and 2).
2. Please provide calculations showing that the storage in the aggregate base is sufficient to
store the entire runoff volume from the rooftop and the rainfall directly onto the
permeable pavement (Permeable Pavement MDC 7).
3. Please provide calculations showing that the permeable pavement will drain within the
timeline required for infiltrating systems (Permeable Pavement MDC 8) or detention
systems (Permeable Pavement MDC 10). Infiltrating permeable pavement calculations
must also be backed up by infiltration tests during the geotechnical investigation.
4. Please provide calculations showing that the outlet from the stormwater system is
protected from erosion during the peak flow from the 10-year storm event (General MDC
4).
5. Please show the permeable pavement and maintenance access (minimum 10-foot wide) in
an easement that extends to the nearest public right of way (General MDC 9).
D E Q173]�� North Carolina Department of Environmental Quality I Division of Energy, Mineral and Land Resources
512 North Salisbury Street 1 1612 Mail Service Center I Raleigh, North Carolina 27699-1612
NORTH CAROLINA �
oepanmem of enmmnmemm Quail� 919.707.9200

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:
h!Ltps:Hedocs.deq.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 September 5, 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 SW1210601 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(a-,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: Asheville Regional Office