SW3191104_Supp EZ Cover_2/14/2020

SUPPLEMENT-EZ COVER PAGE
FORMS LOADED
PROJECT INFORMATION
1 Project Name The Learning Expei
2 Project Area (ac) 1.54
3 Coastal Wetland Area (ac) N/A
4 Surface Water Area (ac) N/A
5 Is this project High or Low Density? High
6 Does this project use an off -site SCM? No
Waxhaw
COMPLIANCE WITH 02H .1003(4)
7
Width of vegetated setbacks provided feet
N/A
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
Rainwater Harvesting RWH
0
18
Green Roof
0
19
Level Spreader -Filter Stri LS-FS
0
20
Disconnected impervious Surface (DIS)
0
21
Treatment Swale
0
22
Dry Pond
0
23
StormFilter
0
24
Silva Cell
0
25
Bayfilter
0
26
Filterra
0
FORMS LOADED
DESIGNER CERTIFICATION
27
Name and Title:
_
.. Sean Coldren, PE / Civil Project Manager
28
Organization:
CES Group Engineers LLP
29
Street address:
274 N. Hwy 16 Suite 300
30
City State Zip:
Denver NC 28037
31
_
Phone numbe_r_(s):
704.489.1500
32
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.
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Signature of Designer
2-l(M I2ozo
Dale

DRAINAGE AREAS
1
Is this a high density project?
Yes
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
1
4
Type of SCM
Sand Filter
5
Total BUA in project (sq ft
37439 sf
6
New BUA on subdivided lots (subject to
permitting) (sq ft)
N/A
7permitting)
New BUA outside of subdivided lots (subject to
s
JOffsite - total area (sq ft
37439 sf
8
sf
sf
9
Offsite BUA (sq ft
10
Breakdown of new BUA outside subdivided lots:
Parking (sq ft
15700 sf
Sidewalk (sq ft
824 sf
Roof (sq ft
10584 sf
Roadway (sq ft)
sf
Future (sq ft
Other, please specify in the comment box
below (sq ft
10331 sf
11
New infiltrating permeable pavement on
subdivided lots (sq ft
N/A
12
New infiltrating permeable pavement outside of
Isubdivided lots (sq ft
N/A
13permitting)
Exisitng BUA that will remain (not subject to
s ft
N/A
14
Existing BUA that is already permitted (sq ft
N/A
15
Existing BUA that will be removed (sq ft
N/A
16
Percent BUA
85%
17
Design storm inches
1 in
18
1 Design volume of SCM cu ft
2243 cf
19
lCalculation method for design volume
Runoff Treatment
DDITIONA NFORMATION 11111111F-
20
Please use this space to provide any additional information about the
drainage area(s):
Synthetic Turf playground area BUA area is 10,331 sf.
Design volume is 75% of water quality volume since we are using a sand
filter.
DRAINAGE AREA INFORMATION
Entire Site
1
4
Type of SCM
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) (so
1995 rules
SL 2006-246
2008 rules

2017 rules
9
Offsite - 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
Existina BUA that will be removed (sq ft
18
Percent BUA
19
Design volume of SCM cu ft
20
lCalculation method for design volume
DDITIONAL INFORMATION
Please use this space to provide any additional
21 information about the drainage area(s):

SAND FILTER
23
Volume that can be retained in the sediment chamber (cubic feet)
1197 cf
24
Will there be a permanent pool in the sediment chamber?
Yes
25
Bottom of the sediment chamber (fmsl)
651.00
26
Area of the sediment chamber (square feet)
315 sf
27
Physical depth of the sediment chamber (inches)
72 in
28
Ponding depth in the sediment chamber, above any permanent pool
(inches)
45.6 in
29
Elevation of top of weir between chambers (fmsl)
652.5
Sand Filter 1 5:16 PM 2/14/2020