SWA000142_As-Built - Certification_20221019 (3)

Project Name FTCC Emergency Service Campus _ Permit # SW6210505
AS -BUILT DESIGNER'S CERTIFICATION FOR
WET DETENTION POND PROJECT
I hereby state that I am a licensed professional and I certify by my signature and seal below, that I have observed
the construction of the project named above to the best of my abilities with all due care and diligence, and that the
project meets all of the MDC found in 15A NCAC 02H.1053, in accordance with the permit documents, plans and
specifications on file with or provided to the Division, except as noted on the "AS -BUILT" drawings, such that the
intent of the stormwater rules and the general statutes has been preserved.
East
❑ Check here if this is a partial certification. Section/phase/SCM #
❑ Check here if this is part of a Fast -Track As -Built Package Submittal per 15A NCAC 02H .1044(3).
❑ Check here if the Designer did not observe the construction but is certifying the project.
Fv� Check here if pictures of the SCM are provided.
Printed Name Roy P. Lorenzen, P.E.
NC Registration Number 15834
Signature - _Z�e Z�� ­_ —
Date October 18, 022
Consultant's Mailing Address:
223 S. West Street
City: Raleigh, State: NC Zip: 27603
Phone:9�19/ 866-4813
Consultant's Email address: [e-mail]
O Circle N if the as -built value differs from the Plan/permit. If N is circled, provide an explanation on page 2.
O N/E = Not Evaluated (provide explanation on page 2). OO N/A = Not Applicable to this project or SCM.
This Certification must be completed in conjunction with the General MDC certification under 15A NCAC 02H.1050.
Consultant's Certification (MDC 15A NCAC 02H .1053)
Forebay / Depths / Fountain
(DAs-built
OWE
®N/A
1. The available Sediment storage is consistent with the approved
plan and is a minimum of 6 in.
or N
2. Water flow over the forebay berm into the main pond occurs at a
non -erosive velocity.
or N
3. The provided Forebay Volume is 15%-20% of the main pool
volume.
or N
4. The Forebay entrance elevation is deeper than the exit elevation
into the pond.
or N
5. The Average Design Depth of the main pond below the
permanent pool elevation is consistent with the permitted value?
(2) or N
6. Fountain documentation is provided.
Y or N
✓
NCDEQ 2/9/2018

Project Name FTCC Emergency Service Campus Permit # SW6210505
Side slopes / Banks / Vegetated ShelfOAs-built
®N/E
ON/A
1. The width of the Vegetated Shelf is consistent with the approved
plans and is a minimum of 6 feet.
�'J or N
2. The slope of the Vegetated Shelf is consistent with the approved
plans and is no steeper than 6:1.
or N
As -built Main Pool / Areas / Volumes / Elevations
OAs-built
ON/E
ON/A
1. The permanent pool surface area provided is consistent with the
permitted value.
or N
2. The Temporary Pool Volume provided is consistent with the
permitted value.
(y or N
3. The permanent pool elevation is consistent with the permitted
value.
rv1 or N
(J
4. The temporary pool elevation is consistent with the permitted
value.
�y or N
Inlets / Outlet / DrawdownOAs-built
ON/E
OO N/A
1. The design volume draws down in 2-5 days.
YD or N
2. The size of the Orifice is consistent with the permitted value.
(Y) or N
3. A trash rack is provided on the outlet structure.
O or N
4. Hydrologic impacts to the receiving channel are minimized from
the 1 yr 24-hr storm discharge?
O or N
5. The inlets and the outlet location are situated per the approved
plan and avoid short-circuiting.
y or N
Vegetation
OAs-built
BN/E
ON/A
1. The vegetated shelf has been planted with a minimum of 3
diverse species.
�_J or N
2. The vegetated shelf plant density is consistent with the
approved plans and is no less than 50 plants per 200 sf or no
less than 24 inches on center.
aY or N
Provide an explanation below for every MDC that was not met, and for every item marked "N/A" or "N/E."
Attach additional pages as needed.
NCDEQ 2/9/2018