SWA000142_As-Built - Certification_20220418

State Stormwater Management
Permit No. SW6210505
AS -BUILT DESIGNER'S CERTIFICATION GENERAL MDC
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 the below listed General MDC found in NCAC 02H.1050 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 statutes has been preserved.
x Check here if this is a partial certification. Section/phase/SCM #? DA1
Check here if this is a part of a Fast -Track As -Built Package Submittal per .l 044(3).
Check here if the designer did not observe the construction, but is certifying the project.
Check here if pictures of the SCM are provided.
Printed Name_ Roy P. Lorenzen, P.E. Signature
NC Registration Number 15834
SEAL: \`\%%u i n 111i//��
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Date March 11,2022
Consultant's Mailing Address:
223 S. West Street, Suite 1100
City/State/ZIP Raleigh, North Carolina, 27603
Phone Number 919.866.4813
Consultant's Email address:
rlorenzenOstewartinc.com
O Circle N if the as -built value differs from the Plan. If N is circled, provide an explanation on Page 2.
OO N/E = not evaluated (provide explanation on page 2) 03 N/A = not applicable to this SCM or project.
Consultant's Certification NCAC .1003((3) & General MDC .1050OAs-built
ON/E
03 N/A
A. TREATMENT REQUIREMENTS
1. The SCM achieves runoff treatment.
or N
2. The SCM achieves runoff volume match.
Q or N
3. Runoff from offsite areas and/or existing BUA is bypassed.
Y or N
nun
4. Runoff from offsite areas and/or existing BUA is directed into
Y or N
N/A
the permitted SCM and is accounted for at the full build -out
potential.
5. The project controls runoff through an offsite permitted SCM
Y or N
NSA
that meets the requirements of the MDC.
6. The net area of new BUA increase for an existing project has
Y or N
N/A
been accounted for at the appropriate design storm level.
7. The SCM(s) meets all the specific minimum design criteria.
Q or N
B. VEGETATED SETBACKS / BUA
1. The width of the vegetated setback has been measured from
Y or N
the normal pool of impounded waters, the MHW line of tidal
waters or the top of bank of each side of rivers or streams.
2. The vegetated setback is maintained in grass or other
Y or N
vegetation.
3. BUA that meets the requirements of NCGS 143-214.7 (b2)(2)
0 or N
is located in the setback.
4. BUA that does not meet the requirements of NCGS 143-214.7
Q or N
(b2)(2) is located within the setback and is limited to:
a. Publicly funded linear projects (road, greenway sidewalk)
b. Water -dependent structures
c. Minimal footprint uses (utility poles, signs, security
lighting and appurtenances)
5. Stormwater that is not treated in an SCM is released at the
Q or N
edge of the setback and allowed to flow through the setback as
dispersed flow.

State Stormwater Management
Permit No. SW6210505
OAs-built
OO N/E
OO N/A
C. STORMWATER OUTLETS — the outlet handles the peak flow
or N
from the 10 year storm with no downslo e erosion.
D. VARIATIONS
1. A variation (alternative) from the stormwater rule provisions
Y N
"/"
has been implemented.
or
2. The variation provides equal or better stormwater control and
Y N
"/"
equal or better protection of surface waters.
or
E. COMPLIANCE WITH OTHER REGULATORY
or N
PROGRAMS has been met.
F. SIZING -the volume of the SCM takes the runoff from all
surfaces into account and is sufficient to handle the required storm
® or N
depth.
G. CONTAMINATED SOILS — infiltrating SCM's are not located
0 or N
in or on areas with contaminated soils.
H. SIDE SLOPES
1. Vegetated side slopes are no steeper than 3H:1V.
Y or N
_
X
2. Side slopes include retaining walls, gabion walls, or other
Y or N
X
surfaces that are steeper than 3H:1 V.
3. Vegetated side slopes are steeper than 3H:1 V (provide
Y or N
X
supporting documents for soils and vegetation).
I. EROSION PROTECTION
1. The inlets do not cause erosion in the SCM.
or N
2. The outlet does not cause erosion downslope of the discharge
or N
point during the peak flow from the 10 year storm.
J. EXCESS FLOWS — An overflow / bypass has been provided.
or N
K. DEWATERING — A method to drawdown standing water has
or N
been provided to facilitate maintenance and inspection.
L. CLEANOUT AFTER CONSTRUCTION — the SCM has been
Y or N
X
cleaned out and converted to its approved design state.
M. MAINTENANCE ACCESS
1. The SCM is accessible for maintenance and repair.
or N
2. The access does not include lateral or incline slopes >3:1.
or N
N. DESIGNER QUALIFICATIONS (FAST -TRACK PERMIT) —
The designer is licensed under Chapters 89A, 89C, 89E, or 89F of
or N
the General Statutes.
Provide an explanation for every MDC that was not met, and for every item marked "N/A" or "N/E", below.
Attach additional pages as needed:
A3. No offsite areas drain onto site.
A4. No offsite areas drain onto site.
A5. No offsite SCM's.
A6. Green site no existing BUA.
B1. No vegetated setbacks on the project.
B2. No vegetated setbacks on the project.
D1 & D2. No variations requested on this project.
E. Project is in compliance with all regualtions.
H1, H2 and H3, SCM's are acting as sediment basins and have not been fully converted to final SCM's.
L. Cleanout of SCM's have not been performed since they are still acting as sediment basins.

State Stormwater Management
Permit No. 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 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.
Check here if this is a partial certification. Section/phase/SCM #? DA1
Check here if this is part of a Fast -Track As -Built Package Submittal per . ] 044(3).
Check here if the Designer did not observe the construction, but is certifying the project.
Check here if pictures of the SCM are provided.
Printed Name Roy P. Lorenzen, P.E. _Signature
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NC Registration Number 15834
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Date March 11,2022
Consultant's Mailing Address:
223 S. West Street, Suite 1100
City/State/ZIP Raleigh, North Carolina, 27603
Phone Number 919.866.4813
Consultant's Email address:
[e-mail]
1D Circle N if the as -built value differs from the Plan/permit. If N is circled, provide an explanation on page 2
OO N/E = not evaluated (provide explanation on page 2) O3 N/A = not applicable to this project or SCM.
This Certification must be completed in conjunction with the General MDC certification under NCAC 02H.1050
Consultant's Certification (MDC .1053)
1OAs-built
OO N/E
O3 N/A
A. Forebay / Depths / Fountain
1. The available Sediment storage is consistent with the approved
or N
plan and is a minimum of 6 in.
2. Water flow over the forebay berm into the main pond occurs at a
® or N
non -erosive velocity.
3. The provided Forebay Volume is 15%-20% of the main pool
or N
volume.
4. The Forebay entrance elevation is deeper than the exit elevation
© N
into the pond.
or
5. The Average Design Depth of the main pond below the
® or N
ermanent pool elevation is consistent with the permitted value.
6. Fountain documentation is provided.
Y or N
N A
B. Side slopes / Banks / Vegetated Shelf
1. The width of the Vegetated Shelf is consistent with the approved
0 or N
plans and is a minimum of 6 feet.
2. The slope of the Vegetated Shelf is consistent with the approved
or N
plans and is no steeper than 6: 1.
C. As -built Main Pool / Areas / Volumes / Elevations
1. The permanent pool surface area provided is consistent with the
Y N
N/E
ermitted value.
or
2. The Temporary Pool Volume provided is consistent with the
Y N
N/E
ermitted value.
or
3. The permanent pool elevation is consistent with the permitted
Y N
N/E
value.
or
4. The temporary pool elevation is consistent with the permitted
Y N
N/E
value.
or

State Stormwater Management
Permit No. SW6210505
OAs-built
OO N/E
OO N/A
D. Inlets / Outlet / Drawdown
1. The design volume draws down in 2-5 days.
Y> 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.
Y) or N
4. Hydrologic impacts to the receiving channel are minimized from
Y) or N
the 1 yr 24 hr storm discharge?
5. The inlets and the outlet location are situated per the approved
yU or N
plan and avoid short-circuiting.
E. Vegetation
1. The vegetated shelf has been planted with a minimum of 3
Y N
NEE
diverse species.
or
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
Y or N
N/E
inches on center.
Provide an explanation for every MDC that was not met, and for every item marked "N/A" or "N/E" below.
Attach additional pages as needed:
A6. Fountain not being installed..
C1, C2, C3 & C4. Have not been surveyed since the SCM is still acting as a sediment basin.
E1 & E2. Have not been planted since SCM's are acting as sediment basins.