SW3190301_Apprentice Academy SuppEZ-2018-Version-2.1.1_20190513

SUPPLEMENT-EZ COVER PAGE
FORMS LOADED
PROJECT INFORMATION
1
Project Name
Apprentice Academy High School
2
Project Area ac
3032
3
Coastal Wetland Area ac
0
4
Surface Water Area ac
0
5
Is this project High or Low Density?
Low
6 1
Does this project use an off -site SCM?
No
COMPLIANCE WITH 02H .1003(4)
7
Width of vegetated setbacks provided (feet)
100
8
Will the vegetated setback remain vegetated?
Yes
9
Is BUA other that as listed in .1003 4 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
1 Rainwater Harvesting RWH
0
18
Green Roof
0
19
Level Spreader -Filter Strip LS-FS
0
20
Disconnected Impervious Surface (DIS)
0
21
Treatment Swale
0
22
Dry Pond
0
23
Storm Filter
0
24
Silva Cell
0
25
Ba filter
0
26
Filterra
0
FORMS LOADED
DESIGNER CERTIFICATION
27
Name and Title:
George Genero, Senoir Project Manager
28
_
Or anization:
Street address:
Alliance Consulting Engineers. Inc.
29
5600 77 Center Drive, Suite 200
30
City., State, Zip:
Charlotte, NC 28217-2750
31
Phone numbers :
704-527-4474
32
Email:
[e-mail]
Certification Statement:
I 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
with the information provided here.
w l
ti p
No_ 35509 TM =
7:i j"
d
f��f��fr�fr n n n H►►►i►,`���ti
Dale
5/13/2019

DRAINAGE AREAS
1
Is this a high 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
CLICK TO LOAD FORM
AREA INFORMATION
Entire Site
1
4
T pe of SCM
Low Density
Sand Filter
5
Total BUA in project (sq ft
90885 sf
94245 sf
6permitting)
New BUA on subdivided lots (subject to
s ft
7permitting)
New BUA outside of subdivided lots (subject to
sf
8
Offsite - total area (sq ft
9
Offsite BUA (sq ft
10
Breakdown of new BUA outside subdivided lots:
Parking (sq ft
23332 sf
71654 sf
Sidewalk (sq ft
1842 sf
3517 sf
Roof (sq ft
32513 sf
Roadway s ft
Future (sq ft
33198 sf
19074 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
13permitting)
Exisitng BUA that will remain (not subject to
s ft
14
1 Existina BUA that is already permitted (sq ft
15
Existing BUA that will be removed (sq ft
16
Percent BUA
8%
55%
17
Design storm inches
1 in
18
Design volume of SCM cu ft
16405 cf
19
Calculation method for design volume
1" over Drainage
Area
ADDITIONAL INFORMATION
20
Please use this space to provide any additional information about the
drainage area(s):
Drainage area information above is broken up into the areas draining to the
SCM (Sand Filter) and remaining areas that sheet flow from the developed
area. Note that the total BUA for the site is approximately 10%.
DRAINAGE AREA INFORMATION
Entire Site
1
4
Type of SCM
N/A
5
Total BUA from project (sq ft)
6
1995 rules
S L 2006-246
2008 rules
2017 rules
New BUA on subdivided lots (subject to
permitting) (sq ft)
1995 rules
S L 2006-246
7
2008 rules
2017 rules
8
New BUA outside of subdivided lots (subject
to permitting) (sf)
1995 rules
S L 2006-246
2008 rules
2017 rules
9
Offsite - total area (sq ft)
1995 rules
S L 2006-246
2008 rules
2017 rules
10
Offsite BUA (sq ft)
1995 rules
S L 2006-246
2008 rules
2017 rules

11
IDesign storm (inches)
1995 rules
S L 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
1 Existina BUA that is already permitted (sq ft
17
Existing 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
JPlease use this space to provide any additional
information about the drainage area(s):

�
F—
U2
z
LU
�
�
0
.j
§
»»»
§
§
$
Z
o
Z
o
Z¥¥
§
§
o
Z
§@
± 0
$ _
7
fco
7
td
7 Co
k \
[ 2
oO
7e
7f
§ ul
�
co
l$
>\
o
\m
Cl.cl
$\
.
R
§
R
o
a
3
C
s
oCo
%
Cl.
2
a Co
(
2
§
/
0
2�
>
\
e j
o
%
6a.
=
o
0
7
§
\
\
/
m
o
2=
\
o
Cl.
m
§
o
t
=
0.
_
£
y
2
Em
g
L
co
7
\k
\
\
72
0
R
=f
R
co
%
�
\
°
\
�CN
2
\ /
a
/
f
§
\
_�
\
\
>
\
& t
.
/
S
o
_
@
0
g
G
%
\$
t$
E
2
e±
=
7\§
t
°{
3
d
= 2
7
2
/
Co
E
E
/
\
7
m
±
£_
_
=
o
@
�
Co
-0
E\
\
0\
p\\
0\
S
=
o\
2
0
=
c 2
\
k
\
\
\
2
k
2
�
O
2\
/
§
#
o
o
@
—
o
=
$ 3
=
m
r
o[_
0)§\.2
_
3\
2
0§
e
E
>
o
B
E=
o
o
E
7
5
@§
5
2
n
\
0\
�
ƒ
\\
Q
3§
CU(n
CD
2
3
\ k
o=
c5m
/
E
_\_
�
O_
o
==
\
\
:
$
�
f
t
/
2
®
S
\
2
f
R:
o
a\/\
R
o
o
/\
$°
k
2«
E
_
R
2
f
�
a/
Q
f
t
\
\
k
\
E
k
E
\
(
\
/
\ v
/
/
\
\
k
\
E
@
\
E
a
�
§
% ®
°
/
f
/
_
/
\
/
a
e
k
k
_j
°
[ f
m
.
o
E
3
a>>«
q
7
�
k
ƒ
\
\
ƒ
\
u
z
\
\
O
ƒ
a
2
/ $
�
A
n
r
o¥
o
0
0
AM
R
\
-0e
0
«

�°00000�0.00000��aaaa���.�00�

SAND FILTER
1 Drainage area number 1
2 juesign volume o cu s
3
Is the SCM sized to treat the SW from all surfaces at build -out?
NG
4
Is the SCM located away from contaminated soils?
Yes
5
What are the side slopes of the SCM (H:V)?
3:1
6
Does the SCM have retaining walls, gabion walls or other engineered
side slopes?
No
7
Are the inlets, outlets, and receiving stream protected from erosion (10-
1year storm)?
Yes
8
Is there an overflow or bypass for inflow volume in excess of the design
volume?
Yes
9
What is the method for dewatering the SCM for maintenance?
Drawdown Orifice
10
If applicable, will the SCM be cleaned out after construction?
Yes
11
Does the maintenance access comply with General MDC (8)?
Yes
12
Does the drainage easement comply with General MDC (9)?
Yes
13
If the SCM is on a single family lot, does (will?) the plat comply with
General MDC (10)?
14
Is there an O&M Agreement that complies with General MDC (11)?
Yes
Yes
15
Is there an O&M Plan that complies with General MDC (12)?
16
Does the SCM follow the device specific MDC?
Yes
17
Was the SCM designed by an INC licensed professional?
Yes
SAND FILTER MDG FROM 02H .1056
18
SHWT elevation (fmsl)
633
19
Type of sand filter (open or closed)
Open
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
Sediment Chamber
23
Volume that can be retained in the sediment chamber (cubic feet)
9538 cf
24
Will there be a permanent pool in the sediment chamber?
No
25
Bottom of the sediment chamber (fmsl)
637.50
26
Area of the sediment chamber (square feet)
3863 sf
27
Physical depth of the sediment chamber (inches)
24 in
28
Ponding depth in the sediment chamber, above any permanent pool
(inches)
1 24 in
29
jElevation of top of weir between chambers (fmsl)
1 839.5
Sand Chamber
30
Volume that can be retained in the sand chamber (cubic feet)
6867 cf
31
Bottom of the sand chamber (fmsl)
637.50
32
Area of the sand chamber (square feet)
2777 sf
33
Physical depth of the sand chamber (inches)
24 in
Ponding depth in the sand chamber, above any permanent pool
34
(inches)
24 in
35
Elevation of the bypass device (fmsl)
639.5
Outlet Control
36
1 Type of bypass device
Structure
Manifold Level
37
Mechanism for distributing flow over the sand surface
Spreader
38
Sand specification for sand chamber
ASTM C-33
39
Depth above underdrain pipe (inches)
12 in
Will the media be maintained to drain at least two inches per hour at
40
the sand surface?
Yes
Is at least one clean -out pipe provided at the low point of each
41
underdrain line?
Yes
42
lWill clean -out pipes be capped?es
ADDITIONAL
INFORMATION
Please use this space to provide any additional information about the
43
Sand Filter(s):
Sand Filter 1 1:37 PM 5/13/2019