SW5210303_NCDEQ-Stormwater Comments-Responses_20210519

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. S I T E D E S I G N
Burlington Park Apartments NCDEQ Stormwater 4-30-2021 Review Comments
4004 Barrett Drive, Suite 101
Raleigh, North Carolina, 27609
TEL [phone]
Comment
Response
Jim Farkas
1. Please clarify the project area (Section IV, 4-10). The project area can be the
✓
The project area has been revised to be just the Phase
Phase 1 area, the limit of disturbance, the property area or some other defined
1 area of 8.99 acres.
area, but it should be consistent throughout the submission. For example, the
project area in Section IV, 7 is 13.99 acres, whereas the project area is 8.99
acres on the Su lement-EZ Form. Revise as needed.
Jim Farkas
2. The drainage area information for the proposed wet pond should be based on
✓
The drainage area has been revised for what is
what is currently being permitted, not the ultimate plan for the property (Section
currently being permitted.
IV, 10). The reason for this is that what is currently being permitted should be
permittable as a standalone project (in the event that the future phases of the
project do not get built). You are allowed to oversize the proposed wet pond in
anticipation for future phases (we can even add specific language in the permit
stating the maximum drainage area and BUA that can ultimately drain to the
pond), but the calculations should reflect what is currently being permitted.
Future BUA is typically reserved for BUA that will be added within the
drainage area to the SCM, not to account for increased areas draining to the
SCM (Changes to the SCM drainage area require a permit modification and
review).
Jim Farkas
3. The drainage area information (Section IV, 10) shows 25,797 square feet of
✓
The drainage area has been revised and there will not
off -site drainage area but does not include any off -site built upon area. Please
be any offsite drainage area.
either revise or provide justification in accordance with 15A NCAC 02H
.1003(3)(b).
Jim Farkas
4. Please provide documentation for how the off -site drainage area was
✓
The drainage area has been revised and there will not
determined. It is recommended to divert any off -site drainage areas not owned
be any offsite drainage area.
by the permittee around the
proposed SCM since off -site drainage areas must be accounted for at their full
build -out potential (please refer to note about off -site drainage areas following
these comments).
NOTE: If the project area will be a subset of the property area, any portion of
the drainage area that is located on the property, but not within the project area
would be considered "off -site".

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. S I T E D E S I G N
4004 Barrett Drive, Suite 101
Raleigh, North Carolina, 27609
TEL [phone]
Jim Farkas
5. Please identify and dimension all BUA in the main set of plans (Section VI,
✓
Added BUA table, see sheet C-4.
8j). The information shown in the Application and Supplement-EZ Form should
be verifiable on the plans in the field without the use of a computer. You may
wish to add a BUA table to the plans.
Jim Farkas
6. Please delineate the drainage area to the proposed SCM in the main set of
✓
Delineated the drainage area to the pond, see sheet C-
lans Section VI, 80 .
4.
Jim Farkas
7. This project is located within a Nutrient Sensitive Watershed (NSW). Please
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Tar -Pamlico Total Nitrogen and Total Phosphorus
ensure that SCMs that reduce nutrient loading (in accordance with 15A NCAC
Loading Calculation Worksheet has been provided.
02H .1017 9 c are being used.
Jim Farkas
8. The Phase 1 boundary should be expanded to include the entire proposed wet
✓
Due to the financing that was acquired, we have to
pond (It's not against the rules to do what is being proposed, it just makes
keep these property boundaries as they are. The
permitting the SCM more difficult if the SCM is located off -site).
separate parcel will be phase 2 and owned by a
separate LLC with the same manager.
Jim Farkas
9. Please provide an emergency spillway, or some other mechanism, for the
✓
Emergency spillway has been provided for controlled
proposed wet pond to handle extreme storm events (General MDC 5).
overtopping of pond.
Uncontrolled overtopping of the pond embankment can cause it to fail
catastro hicall.
Jim Farkas
10. Please provide the surface area of the vegetated shelf so that Wet Pond
✓
Vegetative shelf is 2,715sf. This area is called out on
MDC 1lb can be verified.
the plan view on sheet C-10.
Jim Farkas
11. Supplement-EZ Form, Wet Pond Page, Line 34 — The forebay cleanout
Supplement EZ Form has been revised.
depth is the distance from the permanent pool elevation (380') to the top of the
sediment storage elevation (377'). Based on the provided design, this value
appears to be 36" (This matches the cleanout depth shown in the O&M
A reement Form).