SW5230902_Unaddressed Comments_20241007

Below are comments that remained unaddressed from previous Requests for Additional
Information as of October 7t", 2024:
1. Prior Comment Ld.— "Please ensure that this project is meeting the definition of
"Runoff Treatment"per 15A NCAC 02H.1002(43). In order for a project to meet Runoff
Treatment, the net increase in BUA must be captured and treated in one or more primary
SCMs. If it is not practicable to capture the net increase in BUA, the portions of the site
that do not drain to the SCM can be permitted as a low-density area (in accordance with
15A NCAC 02H.1003(1)(d))provided that the area meets the low-density requirements
outlined in 15A NCAC 02H.1003(2)... "As designed, the project is not meeting Runoff
Treatment. Per the Supplement-EZ Form, this project has a net increase of 359,625 sf of
BUA(Existing BUA=zero) and the drainage area to the SCM is capturing a total of
317,275 sf of on-site BUA resulting in a total of 42,350 sf of uncaptured new BUA.
NOTE: No credit is given for treating off-site impervious areas as it is outside of the
project area and not covered under the permit. Please revise as needed(see permitting
options in the original comment). It is recommended to bypass off-site drainage areas.
Per the provided drainage area delineation, there is BUA within the project area that
will not be captured and directed to the Primary SCM. As a result, this comment
remains unaddressed.
2. Prior Comment Le.— "Please note that there may be additional comments with regard
to the BUA that arise once the BUA accounting is provided/revised. "There appears to be
an issue with the provided BUA accounting. Per the Supplement-EZ Form, the total
amount of BUA allocated to the individual lots (Entire Site Colum, Line 9) is shown as
224,525 sf. Per the deed restriction document and plans, each of the 64 lots is allocated
3,400 sf(3,400 sf/lot * 64 lots =217,600 sf#224,525 sf). Please revise as needed.
The project's BUA accounting remains inaccurate.The values in the provided
Supplement-EZ do not match what is shown elsewhere in the project package and
as a result,this comment remains unaddressed.
3. Prior Comment 2.f.— "Wet Pond MDC 5b—Please clearly indicate the excavated
bottom elevation near the forebay entrance and exit on the cross-sectional view of the wet
pond in the plans. "It is noted that a forebay bottom elevation is provided in the design
table on plan sheet C7.0, however there is no distinction between the forebay bottom
elevation near the entrance and near the exit. Per Wet Pond MDC 5b, the forebay
entrance must be deeper than the forebay exit. Per Wet Pond MDC 3, there should be a
minimum of 6 inches of sediment storage provided above the excavate bottom elevation
of the forebay. Combining these two, the distance from the top of the sediment storage
zone to the bottom of the forebay near the entrance must be at least 6", the distance from
the top of the sediment storage zone to the bottom of the forebay near the exit must be at
least 6", and the bottom of the forebay near the entrance must be lower than the bottom of
the forebay near the exit (see below). Please revise as needed.

There are no elevations indicated to be the forebay entrance and forebay exit on the
main set of plans.This comment remains unaddressed.
4. Prior Comment 4.c.xii.— "Line 43 & 44—Please ensure that the forebay bottom
elevations are specified in the plans so that these values can be verified. " See earlier
comment. NOTE: Per the plans, the bottom of the forebay is shown to be at elevation
209.0' (60"below the permanent pool) and the top of the sediment storage zone in the
forebay is at elevation 210.0' (48"below the permanent pool).
This comment remains unaddressed.
5. Prior Comment 6.— "As indicated in the 911512023 email,please upload the electronic
files for this project to the following web address: https://edocs.ded.nc.gov/Forms/SW-
Supplemental-Upload Electronic files are required per 15A NCAC 02H.1042(2). "The
originally requested electronic files for this project were not provided. NOTE: Electronic
files for the 1/4/24 resubmission were provided, however, the items that were included
with the initial submission (such as the deed restriction form, USGS topo map,plan
sheets, etc...)have not been uploaded and are required to be uploaded.
The project repository is still incomplete, so this comment remains unaddressed.
6. Prior Comment 12 —"Please correct the following item for Lines 5 & 6 of the Entire
Site Column of the Drainage Area Page of the Supplement-EZ Form—Exclude the on-
site surface water area from these values. These values should correspond to the project
area as shown in Section IV, 7 of the Application."
The area associated with the on-site surface water appears to be removed from the
Supplement-EZ form altogether, while the provided plans show that the project
boundaries have not changed. This surface water still needs to be accounted for,
and it is accounted for by excluding it from the project area. In addition, the value
entered into Line 5 is not accurate. Off-site drainage areas are not accounted for as
part of the Entire Site column, as these areas are not a part of the site. Off-site
drainage should only be accounted for in the respective SCM's column, assuming
the off-site drainage is not being bypassed. As a result, this comment was not
adequately addressed.
7. Previous Comment 16—"Please ensure that the SNAP Tool is accurately filled out. For
example, the project area, and SCM drainage area values differ from those shown in the
Supplement-EZ Form. Please revise as needed."
This comment remains unaddressed.