SW1190901_Supplement-EZ Form_20200306

SUPPLEMENT-EZ COVER PAGE
FORtv1S LOADED
-PROJECT INFORMATION
1 Project Name
_ Asheville Regional Airport Parking Lois
2 Pro act Area (ac)
v� 13.41
3 Coastal Wetland Area ac
0
4 Surface Water Area (ac)
0
5 Jis this ro'ect Hi h or Low_Densi 7
Low
6 Does this project use an off -site SCM?
No
COMPLIANCE WITH 02H .1003(4)
7 JWldth of Vegetated setbacks provided feet 30
8 .Will the vegetated setback remaln vegetated?--�_ Yes
9 Is BUA other that as listed in .1003 4 c out of the setback? 1 No
10 Ils streambank stabilization proposed an this project? I —~ No
NUMBER AND TYPE OF SClhls;
11
Infikration S stem
- p
12
Bloreterrtlon Cell.
p
y 13
14
Wet Pond
Stormwater Wetland
0
15
Permeable Pavement
0
16
Sand Filter
- 0
17 Rainwater Harvesting RWH 0
18
Green Roof
0
19
Level Spreader -Filter Ship LS-FS
0
20
21
1 Disconniwled Impervious Surface (DISC
iTreatment Swale
- p
0
22
-�
Dry Pond
0_.
23
StormFilter
0
24
Silva Cell
0
25
Bayfilter
0
26
Filterra
0
FORMSLOADED
Certification Statement,
1 certify, under penally 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
wth the information provided here.
�N C A R 0
4019 =
L
Signature o Designer
Date

DRAINAGE AREAS
1
Is this a hi h density project?
No
2
If so, number of drainage areas/SCMs
1
3
Is all/part of this project subject to previous rule
versions?
No
FORMS LOADED
DRAINAGE AREA INFORMATION
Entire Site
4
Type of SCM
5
Total BUA in project (sq ft
100647 sf
6
New BUA on subdivided lots (subject to
ermitting) (so ft
7
New BUA outside of subdivided lots (subject to
permittin sf)
97915 sf
8
lOffsite - total area (sq ft
9
Offsite BUA (sq ft
10
Breakdown of new BUA outside subdivided lots:
Parking (sq ft
97915 sf
Sidewalk (sq ft
Roof (sq ft
Roadway s ft
Future (sq ft
Other, please specify in the comment box
below (sq ft
11
New infiltrating permeable pavement on
subdivided lots (sq ft
12
New infiltrating permeable pavement outside of
subdivided lots (sq ft
13permitting)
Exisitng BUA that will remain (not subject to
s ft
2732 sf
14
Existing BUA that is already permitted (sq ft
15
Existina BUA that will be removed (sq ft
16
Percent BUA
17%
17
Desi n storm inches
18
Desi n volume of SCM cu ft
19
lCalculation method for design volume
ADDITIONAL INFORMATION
20
Please use this space to provide any additional information about the
drainage area(s):

LOW DENSITY
DESIGN REQUIREMENTS FOR LOW DENSITY PROJECTS FROM 02H .1003
1
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 .1003(2)(c)?
Yes
4
Side slopes of the vegetated conveyances (H:V)
3:1
5
Maximum velocity in the vegetated conveyances during the 10-year storm?
4.41
6
Are curb outlet swales proposed?
Yes
7
Maximum longitudinal slope of curb outlet swale(s) (%)
4%
8
Bottom width of curb outlet swale(s) (feet)
3 ft
9
Maximum side slope of curb outlet swale(s) (H:V)
3:1
10
Minimum length of curb outlet swale(s) (feet)
125 ft
11
Are treatment swales used instead of curb outlet swales?
No
12
Is stormwater released at the edge of the setback as dispersed flow?
Yes
13
Have stormwater outlets been designed to prevent downslope erosion?
Yes
14
ADDITIONAL
15
Are variations to rule .1003 proposed?
INFORMATION
1 Please use this space to provide any additional information about this low density project:
No

Drainage
BUA
Pervious
Q
Slope
Va„°w
Vactual
Flow
Swale #
A
Area
re (ac)
area C
(cfs)
(%)
(fps)
(fps)
depth (ft)
(ac1
ac
1.67
1.61
0.06
96.7
10.43
1.40
4.50
4.41
0.60