SW3191101_Add Info_20191209

ROY COOPER
Governor
MICHAEL S. REGAN
Secretary
S. DANIEL SMITH
Director
Steve Farmartino, PE
1927 S Tryon Street Suite 310
Charlotte, NC 28203
NORTH CAROLINA
Environmental Quality
December 9, 2019
Subject: Request for Additional Information
Stormwater Permit No. SW3191101
Cambridge Village Multifamily
Lincoln County
Dear Mr. Farmartino:
The Division of Energy, Mineral and Land Resources (DEMLR), received a Stormwater
Management Permit Application for the subject project on November 8, 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. The provided coordinates are close to the project site but should be located on the
property that the permit is being applied for (Section I, 4). Please provide coordinates that
are located on the property of the subject project.
2. Since the applicant is a purchaser, please provide a copy of the pending sales agreement
for the property (Section III, lc). If the property has since been conveyed, please correct
this section to show the applicant as the owner.
3. Please provide the name of the signing official for the property owner organization
(Section III, 2a).
4. There are no existing surface waters shown on the USGS topographic map for the project
site (Section IV, 6 & Section VI, 8h). If there are existing surface waters within this
project area, please delineate them and their required buffers, if not, please recalculate the
total project area.
5. The surface area of the wet ponds is not considered impervious area and does not need to
be accounted for or treated (Section IV, 10). If you like, you may reallocate this
impervious area to the future column or remove it from the table and calculations.
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

6. Please complete a Supplement-EZ Form for each SCM. The Supplement-EZ Form can be
found here: hgps://deq.nc.gov/about/divisions/energ_y-mineral-land-resources/ener�,y-
mineral-land-permit-guidance/stormwater-bmp-manual (Section V & Section VI, 3).
7. The O&M Agreement Form is missing some pages (Section V & Section VI, 3). Please
ensure that both "Enable Editing" and "Enable Content" are clicked on the
spreadsheet. Once the information is entered into the spreadsheet, click on the
"Click to update 0&M manual" link to generate the additional pages. A similar
process will need to be done for the Supplement-EZ form to generate all of the
pages.
8. Please provide a USGS topographic map showing the project location (Section VI, 6).
9. Please ensure that all sheets (As applicable) include a north arrow. For example, sheets
C-908, C-909, and possibly others are missing north arrows (Section VI, 8e).
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, 8m).
11. Please provide official documents showing the affiliation of the person listed in Section
III, 1a with North Pilot Road, LLC (Section VI, 11).
12. Please provide official documents showing that Steven Bailey is able to sign on behalf of
BBC Cambridge, LLC (Section IX).
13. The person signing the Applicant's Certification (Section X), Tadd Miller, is not the
same person as listed in Section III, la, Jacob Jacobson. Please revise for consistency.
14. Please QA/QC the package prior to the next submission. Some noted errors include, but
are not limited to the following:
a. Sheet C-908
i. The inflow invert is below the bottom of the wet pond.
ii. The top of the pond is below the permeant pool elevation.
iii. The project name shown in the BMP Insert Table is incorrect.
15. Wet Pond 1
a. The provided stage storage tables in the SWM report do not match the plan
drawings, for example, the shelf elevations.
b. The wet pond, as designed, short circuits from STM B-10 to STM B-60 Wet Pond
MDC 4).
c. The provided forebay is larger than 20% of the main pool volume (Wet Pond
MDC 5).
d. The design volume drawdown time is too slow (Wet Pond MDC 7). Check your
calculations, the pond height is not 792.0' .

16. Wet Pond 2
a. The main pool average depth appears to be too shallow and is calculated
incorrectly (Wet Pond MDC 2). Please refer to the Stormwater Design Manual,
Part C-3 for average depth calculation equations.
b. The provided forebay is smaller than 15% of the main pool volume (Wet Pond
MDC 5).
c. The design volume drawdown time is too slow (Wet Pond MDC 7). Check your
calculations, the pond height is not 783.0'.
d. Based on the information shown on sheet C-301, the main pool of the wet pond is
not located on the property. Please provide an agreement between the applicant
and the adjoining property owner (Cambridge -Denver, LLC) allowing for the
construction of an off -site SCM.
e. The proposed main pool area of this facility appears to be covered under an
existing stormwater permit, SW3160904. Please clarify the extents of this existing
permit and if constructing the proposed wet pond in this location will cause a
reduction in the water quality treatment provided by the existing facility.
17. 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:
hgps://edocs.deq.nc.gov/Forms/SW Project Submittal
While it is not required, it is recommended that Wet Pond 2 be equipped with an emergency
spillway. Even though the wet pond is sized to handle the 100-year storm, an emergency
spillway can prevent structural failure of the embankment if the outlet structure became clogged
or obstructed during a large storm event.
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 8, 2020, 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 SW3191101 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,

)elfM4�
Jim Farkas
Environmental Engineer
Stormwater Program
cc: Mooresville Regional Office