AddInfoRequest

Energy. Mineral &
Land Resources
ENVIRONMENTAL QUALITY
December 19, 2017
Mr. Michael Barefoot, PE
DPR Associates
420 Hawthorne Ln.
Charlotte, NC 28204
Subject: Request for Additional Information
Stormwater Permit No. SW3171201
Village at Granite Quarry
Rowan County
Dear Mr. Barefoot:
ROY COOPER
Governor
MICHAEL S. RLGAN
sectelnr1
TRACY DAVIS
Dlre0w
The Division of Energy, Mineral and Land Resources (DEMLR), received a Stormwater
Management Permit Application for the subject project on December 5, 2017. A preliminary
review of that information has determined that the application is not complete. The following
information is needed to continue the stormwater review:
1. The person signing the application, O&M Agreement, and deed restrictions form must be
a member/manager of LGI Homes — NC, LLC as listed with the NC Secretary of State.
Or provide a signed letter from one of the member/managers listed giving Cedric Combo
signature authority.
2. The notary mistakenly signed in the space where the applicant and property owner are
supposed to sign. Please provide a corrected signed original of SWU-101, O&M
agreement, and the deed restrictions.
3. Revise SWU-101 Sect. IV. 10: Provide the BUA breakdowns for each DA in the bottom
table. These were left blank.
4. Revise the supplement forms:
a. All: Provide the BUA breakdowns for each SCM.
b. Sand filters: Revise the ponding depths, volumes, and bypass elevations to be
based on the WQv.
c. Wetpond: Many items are not consistent with the calcs or plans (side slopes,
volumes, PPE, etc.).
d. All: Fill-in the items left blank.
Nothing Compares--.,-
SState of North Carolina I Environmental Quality I Energy, Mineral and Land Resources
512 N. Salisbury Street 1 1612 Mail Service Center I Raleigh, North Carolina 27699-1612
919 707 9200

5. Sht. L-19 shows only a portion of the future multi -family, and none of the future
commercial, as being treated as part of this permit application. Will these parcels have
other on-site SCMs under future permits, or other? They appear to be part of phase 1, so
the BUA on these areas must show some plan for water quality treatment.
6. Sht. L-5 & L-6: Show the actual grading/contours for the proposed bypass channels and
the ditches.
7. Provide supporting calcs for all channels and ditches to demonstrate they are non-erosive
for the 10 -yr storm.
8. Sht. L-12:
a. Specify that the riprap used for the basin berms must be washed stone to prevent
clogging of the sand filter.
b. The WQv in the calcs for BMP2 is not consistent with that shown on detail 9.
9. Sht. L-13:
a. Shift 3-317 so that it discharges into the forebay, not directly at the forebay berm.
b. Lower 3-317 to the PPE, or provide energy dissipation down to the PPE.
10. 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:Hedocs.deq.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 January 19, 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.
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.
Please reference the State assigned project number SW3171201 on all correspondence. If you
have any questions concerning this matter please feel free to contact me at
Robert.PattersoriRmcderingov or [phone].
Sincerely,
Robert D. Patterson, PE
Environmental Engineer
Nothing Compares --.,-
State of North Carolina Environmental Quality Energy, Mineral and Land Resources
512N. Salisbury Street 1612 Mail Service Center Raleigh, North Carolina 27699-1612
919 707 9200

Stormwater Program
ec: Mooresville Regional Office
Cedric Combo — LGI Homes — NC, LLC
Nothing Compares,—
State of North Carolina Environmental Quality Energy, Mineral and Land Resources
512N. Salisbury Street 1612 Mail Service Center Raleigh, North Carolina 27699-1612
919 707 9200