SW6221003_Supplement-EZ Form_20221018

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FORMS LOADED
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1 Project Name y_TN4� Carolina Wildlife Conservation Park Parking Lot
2..., i Prect Area c�
45.85
®3 ;Coastal Wetland Area ac
0
4 [Surface Water Area
—____ __.._�._ac�_
0
5 j Is thisoroiect High or Low Density?
_6�Does this project use an off -site SCM?
Low
NO
)MPLfANCE WITH 02H .1003(4)
7 lWidth of vegetated setbacks provided (feet n!a
8 I Will the vegetated setback remain vegetated? N/A
9 If BUA is roposeci in the setback, does it meet NCAC 02H.1003 4 c-d ? N/A
T._ _. U _
10 +Is streambank stabilization proposed on this project? No
I IYIOGK HrvU 1 TYC Vr JGIVIS: _ ��
11 'Infiltration System
12 (Bioretention Cell
13 ;?Wet Pond
14 lStormwater Wetland
15 '1Permeable Pavement
16 Sand Filter
17v Rainwater HarvestingARWH
18 Green Roof
19 ;Level Spreader -Filter StripJLS-FSL _
!0 !Disconnected Impervious Surface(DIS
!1 iTreatment Swale
'2 D Pond
".3 StormFilter
4 Silva Cell
15 BOIter
6 Filterra
FORMS LOADED
DIl7ry CK LCKIIrIt1AIlV tli1'-. -
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7 Name and Title:
Zak Shipman, PE President
8-!O anization:
Oman EnaineerinR, PLLC
9 +Street address:
137 Middlegreen Place
0 City, State, Zip:
Holly Springs, NC 27540
1 !Phone number(_
919-900.0006
2 IEmail:
[e-mail]
Certification Statement:
I certify, under penalty of law that this Supplement-EZ form and all supporting information were prepared under my direction or supervision; that
the information provided in the form is, to the best of my knowledge and belief, true, accurate, and complete; and that the engineering plans,
specifications, operation and maintenance agreements and other supporting information are consistent with the information provided here.
6
. Q7 -9 `
SEAL
035027 _
� V
Signature of Desi r
07
Date p

DRAINAGE AREAS
1
Is this a high density project?
No
2
If so, number of drainage areas/SCMs
0
3
Does this roiect have low densit areas?
Yes
4
If so, number of low density drainage areas
1
5
Is all/part of this project subject to previous rule
versions?
No
FORMS LOADED
AREA INFORMATION
Entire Site
LID 1
4
T pe of SCM
n/a
n/a
5
Total drainage area (sq ft
1997226
1997226
6
Onsite drainage area (sq ft
1997226
1997226
7
Offsite drainage area (sq ft
0
0
8
Total BUA in project (sq ft
180522 sf
180522 sf
9permitting)
New BUA on subdivided lots (subject to
s ft
sf
sf
10permitting)
New BUA not on subdivided lots (subject to
s
36971 sf
36971 sf
11
Offsite BUA (sq ft
12
1 Breakdown of new BUA not on subdivided lots:
Parking (sq ft
32549 sf
32549 sf
Sidewalk (sq ft
3156 sf
3156 sf
Roof (sq ft
Roadway s ft
Future (sq ft
Other, please specify in the comment box
below (sq ft
1266 sf
1266 sf
13
New infiltrating permeable pavement on
subdivided lots (sq ft
n/a
14
New infiltrating permeable pavement not on
subdivided lots (sq ft
n/a
15permitting)
Existing BUA that will remain (not subject to
s ft
143551 sf
143551 sf
16
Existina BUA that is already permitted (sq ft
sf
17
Existing BUA that will be removed (sq ft
sf
18
Percent BUA
9%
9 0
19
Design storm inches
n/a
n/a
20
Design volume of SCM cu ft
n/a
n/a
21
Calculation method for design volume
n/a
n/a
ADDITIONAL INFORMATION
22
Please use this space to provide any additional information about the
drainage area(s):
Other impervious is for dumpster pad and concrete apron

LOW DENSITY
DESIGN
1
REQUIREMENTS FOR LOW DENSITY PROJECTS FROM 02H .1003
Is project below density thresholds set forth in the applicable stormwater rule?
Yes
2
Does project maximize dispersed flow and minimize channelization of flow?
Yes
3
Has the use of piping been minimized per. 1 003(2)(c)?
Yes
4
Side slopes of the vegetated conveyances (H:V)
3H:1 V
5
Maximum velocity in the vegetated conveyances during the 10-year storm?
5.01
6
Are curb outlet swales proposed?
No
7
Maximum longitudinal slope of curb outlet swale(s) (% )
8
Bottom width of curb outlet swale(s) (feet)
9
Maximum side slope of curb outlet swale(s) (H:V)
10
Minimum length of curb outlet swale(s) (feet)
11
Are treatment swales used instead of curb outlet swales?
12
Is stormwater released at the edge of the setback as dispersed flow?
N/A
13
Have stormwater outlets been designed to prevent downslope erosion?
Yes
14
JAre variations to rule .1003 proposed?
No
ADDITIONAL INFORMATION
15
Please use this space to provide any additional information about this low density project:
Swale 1 exceeded the allowable velocity with simple vegetation, so we have indicated a TRIM liner which provides protection up
to 12 psf sheer stress and 20 fps velocity.