SW3190704_2 Exhibit #1 -The Supplement EZ Form _1/28/2020

SUPPLEMENT-EZ COVER PAGE
FORMS LOADED
PROJECT INFORMATION
1
Project Name
Skyland Drive Townhomes
2
Project Area ac
4.335 acres
3
Coastal Wetland Area ac
0
4
Surface Water Area ac
0.171
5
Is this project High or Low Density?
High
6 1
Does this project use an off -site SCM?
No
COMPLIANCE WITH 02H .1003(4)
7
Width of vegetated setbacks provided feet
30
8
Will the vegetated setback remain vegetated?
Yes
9
Is BUA other that as listed in .1 0034 c-d out of the setback?
Yes
10
Is streambank stabilization proposed on this project?
No
NUMBER AND TYPE OF SCMs:
11
Infiltration System
0
12
Bioretention Cell
0
13
Wet Pond
0
14
Stormwater Wetland
0
15
Permeable Pavement
0
16
Sand Filter
1
17
Rainwater Harvesting (RWH)
0
18
Green Roof
0
19
Level Spreader -Filter Strip (IS-FS
0
20
Disconnected Impervious Surface (DIS)
0
21
Treatment Swale
0
22
Dry Pond
0
23 IStormFilter
0
24
Silva Cell
0
25
Bayfilter
0
26
Filterra
0
FORMS LOADED
DESIGNER CERTIFICATION
27
Name and Title:
Barry M. Fay P.E.
28
Organization:
American Engineering Associates - Southeast P.A.
29
Street address:
8008 Corporate Center Drive, Suite 110
30
City, State, Zip:
Charlotte, NC 28226
31
Phone numbers :
704 375-2438
32
1 Email:
[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.
Date

DRAINAGE AREAS
Is this a hi h densit ro'ect?
Yes
If so, number of draina a areas/SCMs
1
P
Is all/part of this project subject to previous rule
versions?
No
FORMS LOADED
DRAINAGE AREA INFORMATION
Entire Site
1
4
Type of SCM
—
Sand Filter
5
Total BUA in project (sq ft
61599 sf
58878 sf
6
New BUA on subdivided lots (subject to permitting)
(sq ft
55357 sf
55357 sf
7permitting)
New BUA outside of subdivided lots (subject to
s
{
{
8
Offsite - total area (sq ft
16804 sf
4560 sf
9
Offsite BUA (sq ft
6242 sf
3521 sf
10
Breakdown of new BUA outside subdivided lots:
- Parking (sq ft
4329 sf
4329 sf
- Sidewalk (sq ft
4495 sf
4495 sf
- Roofs ft
21120 sf
21120 sf
- Roadway s ft
20425 sf
20425 sf
- Future (sq ft
4988 sf
4988 sf
- 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
J
13permitting)
Exisitng BUA that will remain (not subject to
s ft
14
Existing BUA that is already permitted (sq ft
15
Existing BUA that will be removed (sq ft
16
Percent BUA
33%
60%
17
Design storm inches
1 in
LL
1 18
Design volume of SCM cu ft
3614 cf
{19
Calculation method for design volume
Simple
ADDITIONAL INFORMATION
20
Please use this space to provide any additional information about the
drainage area(s):
Offsite BUA consists of existing pavement contributing to onsite drainage
areas.
'DRAINAGE AREA INFORMATION
Entire Site 1
4
Type of SCM
N/A
5
Total BUA from project (sq ft)
6
1995 rules
SL 2006-246
2008 rules
2017 rules
7
New BUA on subdivided lots (subject to
permitting) (sq ft)
1995 rules
SL 2006-246
2008 rules
2017 rules
8
New BUA outside of subdivided lots (subject to
permitting) (sf)
1995 rules
SL 2006-246
2008 rules
2017 rules
9
1011site -total area (sq ft)
1995 rules
SL 2006-246
2008 rules
2017 rules
{ 10
Offsite BUA (sq ft)

1995 rules
SL 2006-246
2008 rules
2017 rules
11
Design storm (inches)
1995 rules
SL 2006-246
2008 rules
2017 rules
12
Breakdown of new BUA:
- Parking (sq ft
- Sidewalk (sq ft
- Roof (sq ft
- Roadway s ft
- Future (sq ft
- Other, please specify in the comment box
below (sq ft
13
New infiltrating permeable pavement on
subdivided lots (sq ft
14
New infiltrating permeable pavement outside of
subdivided lots (sq ft
15permitting)
Exisitng BUA that will remain (not subject to
s ft
16
Existing BUA that is already permitted (sq ft
17
Existinq BUA that will be removed (sq ft
18
Percent BUA
19
Design volume of SCM cu ft
20
Calculation method for design volume
ADDITIONAL INFORMATION
21
Please use this space to provide any additional
information about the drainage area(s):

SAND FILTER
18
SHWT elevation (fmsl)
T.B.D.
19
Type of sand filter (open or closed)
20
If closed, will the filter will be pre -cast or pour -in -place?
21
If closed, top of grate elevation (fmsl)
22
Is this sand filter designed to attenuate peak flows?
Yes
I Sediment Chamber
23
Volume that can be retained in the sediment chamber (cubic feet)
I
1982 cf
24
Will there be a permanent pool in the sediment chamber?
No
25
Bottom of the sediment chamber (fmsl)
666.00
26
Area of the sediment chamber (square feet)
844 sf
27
Physical depth of the sediment chamber (inches)
24 in
28
Ponding depth in the sediment chamber, above any permanent pool
(inches)
29
Elevation of top of weir between chambers (fmsl)
668 j
I Sand Chamber
30
Volume that can be retained in the sand chamber (cubic feet)
1974 cf
31
Bottom of the sand chamber (fmsl)
666.00
32
Area of the sand chamber (square feet)
845 sf
33
Physical depth of the sand chamber (inches)
24 in
34
Ponding depth in the sand chamber, above any permanent pool
(inches)
35
Elevation of the bypass device (fmsl)
667.7
36
Type of bypass device
Orifice/Bleeder
37
Mechanism for distributing flow over the sand surface
Sheet Flow
38
Sand specification for sand chamber
ASTM C33
39
Depth above underdrain pipe (inches)
6 in
40
Will the media be maintained to drain at least two inches per hour at the
sand surface?
Yes
41
Is at least one clean -out pipe provided at the low point of each
underdrain line?
Yes
42 1
Will clean -out pipes be capped?
Yes 1
'ZONAL INFORMATION
Please use this space to provide any additional information about the
43 Sand Filter(s):
All of the runoff from proposed BUA is directed towards the sand filter.
�joWE,
Sand Filter 4 2:54 PM 11/20/2019