HomeMy WebLinkAboutSW3190506_Add Info Request_20190621ROY COOPER
Governor
MICHAEL S. REGAN
Secretary
S. DANIEL SMITH
Director
Frank Cantrell, PE
9800 Southern Pine Blvd, Suite 1
Charlotte, NC 28273
NORTH CAROLINA
Environmental Quality
June 21, 2019
Subject: Request for Additional Information
Stormwater Permit No. SW3190506
Sealand Office
Cabarrus County
Dear Mr. Cantrell:
The Division of Energy, Mineral and Land Resources (DEMLR), received a Stormwater
Management Permit Application for the subject project on Date Recieved May 24, 2019D. A
review of that information has determined that the application is not complete. The following
information is needed to continue the stormwater review:
Please use the proper application form (SWU-101). The application can be found at the
following link:
hgps://deq.nc. gov/about/divisions/enemy-mineral-and-land-resources/stormwater/
stormwater-pro rg am/post-construction
2. Please specify the type of project (Low Density, High Density, Off -site, or Other) in the
application (Section II, 2). Please refer to the NCDEQ Stormwater Design Manual for
help determining what type of development this project qualifies as. The NCDEQ
Stormwater Design Manual can be found at the following link:
hgps://deq.nc. gov/about/divisions/enemy-mineral-land-resources/energy-mineral-land-
permit-guidance/stormwater-burp-manual
3. Please provide information on the local government that will be issuing the building
permit (Section III, 4). This will assist us in getting a copy of the permit to the correct
Building Inspection Office.
4. Please include the total area of surface waters on the project site (Section IV, 6). If there
are surface waters present on the property site and the total surface water area is less than
D EQ 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 _
o.PaWnamofEnvironmental Quality /� 919.707.9200
0.01 acres, you may write "< 0.01" in this section and treat it as zero for calculation
purposes.
5. Please include a signed, sealed, and dated Supplement-EZ Form for the proposed BMP
(Section V). The form can be found at the following link:
https://deq.nc. gov/aboutldivisions/energy-mineral-and-land-resources/stormwaterl
stormwater-pro rg am/post-construction
6. Please enter the relevant drainage area information into the tables under Section IV, 10.
7. Please identify any wetlands that are located on the project site. If no wetlands are
present, please provide a note on the plans stating so. Please also provide the name and
contact information for the person who made this determination (Section VI, 8, m).
8. Please provide a plan sheet showing the entire drainage area for the proposed BMP
(Section VI, 8, o). Do not forget to include the facility itself in this delineation.
9. Please provide a soils report based on an actual field visit. This report should contain the
Seasonal High -Water Table, SHWT (Section VI, 9). This is an MDC for sand filters.
10. The storage volume in the sediment chamber and the sand chamber of the sand filter
should be equivalent (Sand Filter MDC 2).
11. Provide riprap sizing calculations to show that flows into the BMP and out of the BMP
are non -erosive (General MDC 4).
12. 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:
hqps://edocs.deq.nc.gov/Forms/SW—Project Submittal
While it is not required, it is recommended that:
- Calculations showing that water flowing from FES-2 around the proposed BMP will not
travel at an erosive velocity or will not overtop the embankment and flood into the sand
filter.
- The top of grate elevation and top of emergency spillway weir elevation are shown as
different values on the Sand Filter Detail and Outlet Structure Detail on sheet C-404.
- A stage storage table be included on C-404.
Please note that this request for additional information is in response to a vLehminary review.
The rqquested information should be received by this Office prior to Today +30 July 21,
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 SW3190506 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
Jim.Farkas@ncdenr.gov or (919) 707-3646.
Sincerely,
V✓vl
Jim Farkas
Environmental Engineer
Stormwater Program
cc: Mooresville Regional Office