SW6240502_Response To Comments_20240923

BECKER
MORGAN
GROUP
ARCHITECTURE
ENGINEERING September 23,2024
PLANNING OUR
CLIENTS'SUCCESS Jacob Beeker
Stormwater Permitting Engineer
North Carolina Department of Environmental Quality
DEMLR Post-Construction Stormwater Program
Fayetteville Regional Office
512 N. Salisbury Street, Office 625Z
Raleigh,North Carolina 27604
RE: Complete Stormwater Management Submittal
DOLLAR GENERAL DUNN
Dunn,North Carolina
BMG Project No. 2023218.00
Permit No: SW6240502
Dear Mr. Beeker:
Becker Morgan Group is submitting the complete documentation for a High-Density
Stormwater Management Permit on behalf of Rhetson Companies,Inc. (Applicant/Developer)
for a Dunn,North Carolina commercial development. The project includes a wet pond facility
and per NCDEQ request we have included the following documents with this submittal:
• Comment Response Letter(included in this document)
• Detailed Narrative
• Signed Stormwater Application(wet signed copy to be mailed)
• Signed O&M Agreement(wet signed copy to be mailed)
BECKER MORGAN GROUP,INC. • Signed EZ Supplement(wet signed copy to be mailed)
3333 JApcweDrove,SunE 120 • Sealed, Signed, and Dated Calculations(wet signed copy to be mailed)
WIIMINGTON,NORTH CAROLNA 28403 • USGS Map
910.341.7600 • Copy of any applicable soil report with the associated SHWT elevations
615 SourH CoueoE STREET,SunE 9-112 • Property Deed
CHARLOTTE,NORTHCAROUNA28202 • NC Secretary of State documentation for corporations and limited liability
980.270.9100
corporations
314EAsr MAN STREer o A signed statement is provided from Rhetson Companies, Inc. in lieu of the CN
CLAYroN,NoRTHCAROLNA27520 Secretary of State documentation to identify Jamie Encinosa as COO with
919.243.1332 signing authority.
PORT EXCHANGE • Two (2) sets of plans (including Landscape Plan, Stormwater Management Plan, and
312 WEST MAIN STREET,Suns 300 Drainage Area Maps) folded two(2) full-sized sealed, signed, and dated
SALSBURY,MARYL9ND 21801
410.546.9100 Items in blue above are included with the SWM Report. There are no proposed deed
309 SOUTH GOVERNORS AVENUE restrictions on the project.
DOVER,DELAWARE 19904
302.734.7950 Finally,we offer the following explanation to the comments that were given below:
THE TOWER AT STAR CAMPUS
100 DISCOVERY BOULEVARD,SurIE 102 1. Submissions
NEWARK,DEIAWARE 19713
302.3693700
a. NCDEQ comment: Please upload all project documents to the electronic
www.beckermorgan.com

BECKER
MORGAN
G R O U P
ARCHITECTURE
ENGINEERING repository,as required by 15A NCAC 02H.1042(2). The link to upload the files
is listed in comment 8a.
b. BMG Response:All plans and documents will be uploaded to the electronic
submission portal as well as mailed to the NCDEQ office.
2. General
a. NCDEQ comment: There are inconsistencies noted with what is defined as the
"Total Project Area" (Section IV, 4 of the Application) and what is defined as
the"Total Property Area"(Section IV,7 of the Application).
b. BMG Response: Total Project Area has been revised to be a subset of the
property area and the value has been updated throughout subsequent files.
The Subset area has been delineated using the delineated area of the proposed
projects of the site.
3. Consistency
a. NCDEQ comment: The plans, as well as the "Storage Elevation for Provided
volume" inside the calculations, show the Temporary elevation as 177.60, but
the Supplement EZ and O&M Agreement list the Temporary Poll elevation as
176.51.
b. BMG Response: The 176.51' elevation shown in the wet pond calculations
sheet, the Supplement EZ Form, and the O&M Agreement is the Temporary
Pond elevation of the 1"storm event. This is the elevation we are required to
drain through the low flow orifice. The 177.60'elevation is the storage we are
providing for the 1"storm before the 6"X 6"orifice is reached. Essentially,
we are providing more storage than the 1"storm needs.
4. Application
A. Regulation
a. NCDEQ comment: Please ensure that subsequent submissions of the
original Application are wet ink signed and initiated in blue ink.
b. BMG Response: Subsequent submission will be wet signed per 15A
NCAC 02H.1042(2).
B. Section IV,4/7
a. NCDEQ comment: Section IV, 4/7 See comment 2 regarding this
correction. The Total Project Area must reflect what is listed for the Total
Property Area,no matter which option is chosen.
b. BMG Response: Total Project Area now reflects the subset of the Total
Project area which has been delineated with bearing and distances.
C. Section IV,8
a. NCDEQ comment: Section IV, 8 — this value may need to be revised,
pending other revisions.
b. BMG Response: The new percentage impervious has been marked in
Section IV, 8.
D. Section IV, 10
i. Tables

BECKER
MORGAN
G R O U P
ARCHITECTURE
ENGINEERING a. NCDEQ comment: For both the Basin Information and the
Impervious Surface area tables, only list the BUA/Drainage Area
that contributes to the SCM. If said drainage area or BUA does not
contribute to the SCM, do not include it.
b. BMG Response: The Basin Information and Impervious Surface
area tables have been revised to only include BUA/Drainage Area
that drains to the SCM.
ii. Basin Information
a. NCDEQ comment: Total Drainage Area—The value provided does
not correspond to any drainage area delineated on the main set of
plans. In addition, this should be equal to the sum of the on- and
off-site drainage areas.
b. BMG Response: The Total Drainage Area in Section IV, 10 has
been revised to correspond with the area that is shown in the main
set of plans.
a. NCDEQ comment: Proposed Impervious Area—This value should
correspond to only newly built BUA which will drain to the SCM.
b. BMG Response: Value in Section IV, 10—now corresponds with
the area of impervious newly built BUA that drains to the SCM.
a. NCDEQ comment: %Impervious Area—This value may need to be
revised,pending other revisions
b. BMG Response: Percent Impervious Area was revised per the
changes in other table cells.
iii. Impervious Surface Area
a. NCDEQ comment: Please ensure these values reflect only the BUA
which will drain to the SCM.
b. BMG Response: BUA area shown in Impervious Surface Area
Table Section IV, 10 shows only the BUA that will drain to the
SCM.
5. Supplement EZ Form
A. Cover Page
a. NCDEQ comment: Line 2 — Please list the project area (as shown in
Section IV, 7 of the application) for this item,not the "property" area(as
shown in Section IV,4)
b. BMG Response: Line 2 of the Supplement EZ Form now corresponds
with the value that is shown in Section IV, 7 of the application.
B. Drainage Areas Page
i. Entire Site Column
a. NCDEQ comment: Line 5-7 — This information should match the
information in section, IV— 10 of the application and should refer
to the total project area.
b. BMR Response: The information for lines 5-7 now matches that
which is shown in Section IV—10 of the application.

BECKER
MORGAN
G R O U P
ARCHITECTURE
ENGINEERING a. NCDEQ comment: Line 18 — May require revision, depending on
the approach used to resolve comment 2.
b. BMG Repsonse: Line 18 is revised and consistent with line 2 on
comments above.
ii. Draiange Area 1 Column
a. NCDEQ Comments: This column should reflect only the BUA and
drainage area that drains to the SCM. These values should match up
to the drainage Area 1 column in Section IV, 10 of the Application.
b. BMG Response: The column reflects the drainage area capturing
the BUA that drains to the SCM.
C. Wet Pond Page
a. Line 48 —It appears, from the plans provided, that the orifice does draw
down from below the permanent pool surface.
b. BMG Response:Line 48— The low flow orifice for the pond has been
set at the same elevation as the permanent pool(176.25). What you are
referring to is the tee fitting that comes off the orifice and extends down
into the permanent pool. This is installed to prohibit the orifice from
getting clogged, but it will not discharge until the pond elevation
increases above 176.25
6. Plans
a. NCDEQ comment: If drainage areas are updated, please ensure they are
delineated on the main set of the plans to ensure compliance with 15A NCAC
o2H .1042(2)(g)(iv).
b. BMG Response:Pre-development and post-development drainage maps have
been included with this plan submission to reflect what is on the application
and supplement forms.
7. Plans
a. NCDEQ comment: Please Clearly show the maintenance access and easements
in the main set of plans (General MDCs 8 & 9). The maintenance access and
easement should be at least 10 ft wide (25 ft is recommended for wet ponds),
should not have excessively steep slopes,and should extend to the nearest public
right-of-way. The entire SCM (side slopes, forebay,riser structure, SCM, dam
embankment, outlet, emergency spillway, etc.). Plus, an additional 10 or more
ft around the SCM should be included in the easement.
b. BMG Response: A 10' wide maintenance access easement is provided and
shown on sheet C-201 with the wet pond detail. The access area and easement
are shown to the right of way on Long Branch Road.
8. Plans:
a. NCDEQ comment: The surface area of the vegetated shelf could not be found
on the plan sheet provided, and therefore Wet Pond MDC 11 could not be
verified at this time. Please add a callout to this area, or direct reviewers to this
information so that MDC 11 may be verified.
b. BMG Response:Per L-001 the vegetated shelf is being called out at 2,487 SF

BECKER
MORGAN
G ROUP
ARCHITECTURE
ENGINEERING and there are 622 plants provided meeting the requirements of 50 plants to 200
SF.
If there is any additional information that we can provide to aid in your review,please do not
hesitate to contact me.
Sincerely,
BECKER MORGAN GROUP,INC.
Trevor H.M. Smith,P.E.
Civil Engineer
202321800ap-ltr-Dunn-NCDEQ SWM response letter.docx