SW5240603_Response To Comments_20241010

Dewberr °
MEMORANDUM
DATE: October 9, 2024
TO: NCDEQ— Raleigh Regional Office
FROM: Dewberry Engineers
SUBJECT: Eaddy building Addition -Application number: SW5240603
Message
Eaddy Building Addition
Stormwater Permit Application Brianna Holland
Status:09/26/2024 Requires Re-submit.
1. Application
a. Section II, 4: This Project appears to be within a 5-mile radius of Raleigh-Durham
International Airport, please revise
Response:Noted, this has been updated.
b. Section III, 4: Please complete this section on local jurisdiction for building permits.
Response:Noted, the City of Raleigh's information has been included.
c. Section IV, 4-7: The "Total Project Area" can be a subset of the property area (such as
the Limit of Disturbance), or it can be the property area, sans on-site surface water and
wetland areas. The project area and total surface water area must be delineated on the
main set of plans. (15A NCAC 02H .1042(2)(g)(iii)). 999.5 acres of project area and 22.06
acres of surface water area are not currently delineated on the plans. Bearings and
distances must be provided for the project area 15A NCAC 02H.1042(2)(g)(ii), .1002(15),
and .1002(38):
4. Total Property Area 999.5 acres 5 Total Coastal Wetlands Area:N/A acres
6. Total Surface Water Area.22.06 acres
7. Total Property Area(4)—Total Coastal Wetlands Area(5)—Total Surface Water Area(6)=Total Project
Area':977.44 acres
Response: The total project area has been revised to be a subset of the property, as
defined on sheet L-201. The subset property area is 1.96 acres. The total surface water
area is 0.07 acres, therefore the total project area is 1.89 acres. Bearings and distances
of the project area are shown on sheet L-201.
d. Section VIII: Please complete consultant information
Response:Noted, this section has been updated with Bentley Ruggles information.
2. Supplement-EZ Form: 1x hard copy of the complete, original Supplement-EZ Form is required
per Sections V& VI, 3 of the Application.
a. Cover, Line 7-8— Per 15A NCAC 02H .1017(10), the vegetated setback width from
surface waters is 30 ft. Please revise.
Response:A 30 ft setback was noted in lines 7 and 8 of the EZ Form.
MEMORANDUM 1 OF 3

b. Low Density Page, Line 4- Provide; if there are multiple side slopes they can be listed in
Line 15. 15A NCAC 02H.1003(2)(c): Side slopes for vegetated conveyances shall be no
steeper than 3:1 unless it is demonstrated that the soils and vegetation will remain stable
in perpetuity based on engineering calculations and on-site soil investigation.
Response: The side slopes are 3:1, line 4 of the low-density page has been updated.
c. Low Density Page, Swales Table - Per Sheet L-301, there are 2 swales. Include both the
Swales table and calculations, or revise for consistency.
PERMANENT DITCH SCHEDULE
DITCH NO. KIN. DEPTH (TT) SIDE SLOPE (Xd) DOTTOI WIDTH(FT) LONGITUDINAL SLOPE LENGTH PERN. LINING
•1 1 3 0 2X 78 GRASS
•2 1 3 4 3% 26 CLASS I RIP RAP
Response: The low-density page has been updated to include the 2 swales that are
shown on sheet L-301.
3. Plans: 2x hard copies of revised plan sheets with the following corrections made (This item is
required per 15A NCAC 02H.1042(2)(g) and per Section VI, 8 of the Application)
a. 15A NCAC 02H .1042(2)(g): ...All plan packages shall include... (ii)dimensioned project
or project phase boundary with bearings and distances. Ensure the Project Area is
consistent throughout the package.
Response: The project boundary area with bearings and distances is shown on sheet L-
201.
b. 15A NCAC 02H .1042(2)(g): All plan packages shall include: (iii)the boundaries of all
surface waters, ... protected vegetated setbacks, and protected riparian buffers." Please
include delineated surface water areas and vegetated setback from top of bank of
streams. If it is not possible to delineate the banks of the surface water(as would be the
case for a narrow stream), please show the centerline of the surface water and provide a
callout listing the surface area of that surface water that is within the project boundary.
Note that the surface area of the surface water is the area between the top of the banks
of the streams and normal pool of impounded structures. Ensure the vegetated setback
is measured horizontally from the top of bank of each side of streams for all perennial
and intermittent surface waters within and adjacent to the site.
Response: The Neuse River riparian buffer, the 30 ft vegetated setback and surface
water area are shown on sheet L-201. The surveyed top of bank was used to determine
the 30'vegetated buffer. In areas where the top of bank was not surveyed, the 30'
vegetated buffer was determined from the stream centerline. The disturbed project area
is not located within the 30'buffer. The surface water area of the stream within the
project area is 3,124 SF.
4. O&M Agreement: 1x original, signed&notarized hard copy of the O&M Agreement Form (This
item is required per 15A NCAC 02H.1042(2)0) and per Sections V& VI, 3 of the Application)
a. Please ensure the O&M Agreement is uploaded to the electronic repository
Response: The O&M agreement has been signed, notarized. It was submitted via the electronic
repository and sent in hard copy package.
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5. Please provide a Response to Comments letter indicating, in a point-by-point manner, how each
of the above comments has been addressed. This item is required per 15A NCAC 02H
.1042(3)(b).
Response:Noted.
6. Provide PDFs of all revisions, 2 hardcopies of revised plan sheets, 1 hardcopy of other
documents, and a response to comments letter briefly describing how the comments have been
addressed.
Response: The documents have been submitted electronically, as well as delivered to the Central
office.
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