SW3190501_Add Info Request_20190610

ROY COOPER
Governor
MICHAEL S. REGAN
Secretary
S. DANIEL SMITH
Interim Director
Carlos Barrios, PE
605 Delaney Ave. Suite C
Orlando, FL 32801
NORTH CAROLINA
Environmental Quality
June 10, 2019
Subject: Request for Additional Information
Stormwater Permit No. SW3190501
United Parcel Service
Iredell County
Dear Mr. Barrios:
The Division of Energy, Mineral and Land Resources (DEMLR), received a Stormwater
Management Permit Application for the subject project on May 6, 2019. A review of that
information has determined that the application is not complete. The following information is
needed to continue the stormwater review:
Please include the stream name and classification for where the roadside ditch ultimately
outfalls to on the application (Section IV, 10, Receiving Stream Name).
2. Please include only the area that drains to the BMP, not the entire property area, in the
drainage area section of the application (Section IV, 10, Total Drainage Area). Please
also recalculate the values for on -site and off -site drainage areas to reflect this change.
3. Please complete a Supplement EZ form for each BMP. The Supplement EZ form can be
found here: https://deq.nc.gov/about/divisions/energy-mineral-land-resources/energy-
mineral-land-permit-guidance/stormwater-bmp-manual (Section V).
4. Please provide signed, sealed, and dated design calculations (Section VI, 7). Calculations
should include, but are not limited to:
a. Calculations showing that the rip -rap at the inlet of the stormwater wetland and
lack of rip -rap downstream of M.E.S.-3 are sufficient to prevent erosion during
the peak flow from the 10-year storm (As per 15A NCAC 02H .1050(4)).
b. Calculations showing that the 0.75in/hr storm will pass through the grass swale at
a rate of 0.5 fps or less, with a depth of 6 inches or less, in at least 4 minutes (As
per 15A NCAC 02H .1061(3))
DNorth Carolina Department of Environmental Quality I Division of Energy, Mineral and Land Resources
E Q��
_ 512 North Salisbury Street 1 1612 Mail Service Center I Raleigh, North Carolina 27699-1612
NORTH CAROLINA
Department of Environmental Wal�� 919.707.9200

c. Calculations showing that the 10-year storm will be passed at a non -erosive
velocity (As per 15A NCAC 02H .1061(5).
5. Please delineate the wetlands on the plans or provide a note stating that no wetlands exist.
Provide documentation of the qualifications and identity of the individual who made this
determination (Section VI, 8, m).
6. Please show the drainage areas for the BMPs on the plans (Section VI, 8, o).
7. Please provide a copy of the current property deed (Section VI, 10).
8. Please provide official documents with name, title, and position for those listed in Section
III of the application (Section VI, 11).
9. The spot elevations of the grass swale, 823.70 feet on the downstream side and 824.00
feet (Shown incorrectly in the stormwater management report, page 4, and inferred from
cross-section A -A on sheet C2.0) imply that the grass swale has a slope of 0.003 ft/ft.
This slope is shown as 0.03% (Equal to 0.0003 ft/ft) on the plans. Please revise for
consistency.
10. The stormwater wetland grading shown in the plans does not match the grading shown in
the stormwater management report. Please revise for consistency.
11. The forebay area appears to be less than 10% of the stormwater wetland surface area, less
than 24" deep, and at a higher elevation than the outlet. Please revise in accordance with
15A NCAC 02H. 1054(6).
12. The requisite "deep pools" for the stormwater wetland do not appear to be shown on the
plans. Please revise in accordance with 15A NCAC 02H .1054(7).
13. Sod is not an acceptable planting for a stormwater wetland. Please delineate the planting
zones and select appropriate plants in accordance with 15A NCAC 02H .1054(12)(a),
15A NCAC 02H .1054(13), and 15A NCAC 02H .1054(14).
14. Please provide a trash rack or other device to trap debris on M.E.S.-2 in accordance with
15A NCAC 02H. 1054(17).
15. 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:
https://edocs.deq.nc.gov/Forms/SW—Project—Submittal
While it is not required, it is recommended that the off -site drainage from upstream properties be
diverted around the BMPs since the applicant cannot maintain control over the development of
property that they do not own.

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 July 10, 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 SW3190501 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,
v_ vl
Jim Farkas
Environmental Engineer
Stormwater Program
cc: Mooresville Regional Office