SW3190804_Add Info_20190913

ROY COOPER
Governor
MICHAEL S. REGAN
Secretary
S. DANIEL SMITH
Director
Patrick Murphy, PE
127 Ben Casey Drive Suite 101
Fort Mill, SC 29708
NORTH CAROLINA
Environmental Quality
September 13, 2019
Subject: Request for Additional Information
Stormwater Permit No. SW3190804
Pine Forest II
Iredell County
Dear Mr. Murphy:
The Division of Energy, Mineral and Land Resources (DEMLR), received a Stormwater
Management Permit Application for the subject project on August 15, 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. Please clarify who the Owner and Developer are (Section III, la & lc). The Applicant is
either the "Property Owner" or the "Developer". If the property owner will be developing
the site, just select "Property Owner" and do not fill out Section III, 2.
2. Please include the type of SCMs that will be used in the summary (Section IV, 1).
3. Please include the "Total Surface Water Area" from Duck Creek that is located on the
property (Section IV, 6) and show the square footage of the surface water area in the
plans (Section VI, 8, h).
4. Please recalculate the "Total Project Area" value taking into account the prior comment
(Section IV, 7).
5. Please recalculate the "Project percent of impervious area" value taking into account the
prior comment (Section IV, 8).
6. Please complete the "Impervious Surface Area" table (Section IV, 10).
7. There is a discrepancy between the impervious area shown for Drainage Area 1 in the
application (211,134 sf = 4.85 ac) and the impervious cover shown in "Section 6, SCS
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

RCN Post Sand Filter #100" of the supporting calculations (4.67 ac). Please revise for
consistency.
8. Based on the provided `BMP Drainage Areas" sheet, there appears to be some offsite
drainage and impervious areas for sand filter 200. Please include this information in
Section IV, 10 & 11.
9. Some of the provided calculation sheets are illegible, for example, the spreadsheets with
dark colored boxes in section 6 of the report (Section VI, 7). I reviewed what I could, but
it was not a complete review because of this.
10. 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).
11. Since this project is subject to 15A NCAC 0211.1017, the minimum vegetated setback
from surface waters is 30 feet (Section VI, 8, p).
12. Please provide a copy of the soils report once it becomes available (Section VI, 9).
Ensure that the SHWT elevation is included (Sand Filter MDC 1).
13. Please provide proof of title and position for the signing official (Section VI, 11). Please
also initial this item in the application.
14. The total BUA from all of the lots on the deed restriction document adds up to 263,405 sf
whereas the application shows a total, site wide BUA of 1362,208 (Section VII). Please
revise for consistency.
15. Please only fill this section out if Section III, 2 has been filled out (Section IX).
16. Please only list the person from Section III, 1a in the first blank area of this section
(Section X).
17. For each sand filter, the sediment chamber and sand chamber should have the same
storage volume (Sand Filter MDC 2).
18. Please specify the media to be used in the sand filters (Sand filter MDC 6).
19. The proposed SCMs do not capture the runoff from all proposed BUA (General MDC 1).
All new BUA must drain to one of the proposed SCMs if the Runoff Treatment Method
is being used to address stormwater requirements.
20. Please provide riprap calculations to show that the inlets and outlets of the SCM are
protected from the 10-year storm event (General MDC 4).
21. Ensure that the information in the Supplement-EZ Form is consistent with the design and
Minimum Design Criteria (MDC) for sand filters. MDC for sand filters can be found at

the following link:
hgps://files.nc. gov/ncdeq/Energ_y%20Mineral%20and%2OLand%2OResources/Stormwate
r/BMP%20Manual/C-6--Sand-Filter-11-7-2018.pdf
22. 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 amount of pervious area draining to the sand
filter be limited since pervious surfaces produce fine particles that can clog the sand filter,
increasing the maintenance that will need to be performed on the facility.
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 October 13, 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 SW3190804 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,
Jim Farkas
Environmental Engineer
Stormwater Program
cc: Mooresville Regional Office