SW6200903_2020.09.14-SuppEZ-2018-Version-2.1.1-2_20200924

SUPPLEMENT-EZ COVER PAGE
FORMS LOADED
INFORMATION
ect Name Winchester Subdivision
3 lCoastal Wetland Area ac
4 Surface Water Area ac 0
5 Ils this project High or Low Density? Low
6 Does this Droiect use an off -site SCM? No
COMPLIANCE WITH 02H .1003(4)
7
Width of ve etated setbacks provided feet
30
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
0
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
StormFilter
0
24
Silva Cell
0
25
Ba filter
0
26
Filterra
0
FORMS LOADED
DESIGNER CERTIFICATION
27
Name and Title:
Jeremy Thomas, PE. - President
28
Organization:
J Thomas Engineering, Inc.
29
Street address:
143 Charlotte Avenue, Suite 104
30
City, State, Zip:
Sanford, NC 27330
31
Phone numbers :
919 777-6010
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.
Designer
�e
s�
Seal `
Signature of Designer
Date

DRAINAGE AREAS
1
Is this a high density project?
No
2
If so, number of drainage areas/SCMs
4
3
Is all/part of this project subject to previous rule
versions?
No
FORMS LOADED
DRAINAGE AREA INFORMATION
Entire Site
1
4
1TvDe of SCM
5
Total BUA in pro ect (sq ft
203039 sf
6
New BUA on subdivided lots (subject to permitting)
(sq ft
115500 sf
7
New BUA outside of subdivided lots (subject to
ermittina) (sfi
104039 sf
8
Offsite - total area (sq ft
sf
9
Offsite BUA (sq ft
sf
10
Breakdown of new BUA outside subdivided lots
Parking (sq ft
Sidewalk (sq ft
8149 sf
Roof (sq ft)
Roadway s ft
79390 sf
Future (sq ft
Other, please specify in the comment box belo
(sq ft
11
New infiltrating permeable pavement on subdivide
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
Existing BUA that is already permitted (sq ft)
15
Existina BUA that will be removed (sq ft
16
Percent BUA
15%
17
Design storm inches
18
Design volume of SCM cu ft
19
ICalculation method for design volume
ADDITIONAL INFORMATION
20
Please use this space to provide any additional information about the
drainage area(s):
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
New BUA on subdivided lots (subject to
permitting) (sq ft)
1995 rules
SL 2006-246
7
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
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
1 Breakdown of new BUA:
Parking (sq ft
Sidewalk (sq ft
Roof (sq ft
Roadway (sq ft)
Future (sq ft
Other, please specify in the commen4bbelo
(sq ft
13
New infiltrating permeable pavement on subdivided
lots (sq ft
14
New infiltrating permeable pavement outside of
subdivided lots (sq ft
15
Exisitng BUA that will remain (not subject to
permitting) (sq ft)
16
Existing BUA that is already permitted (sq ft
17
Existing BUA that will be removed (sq ft
18
Percent BUA
19
DE n volume of SCM cu ft
20
Calculation method for design volume
ADDITIONAL INFORMATION
21
1 Please use this space to provide any additional
information about the drainage area(s):

LOW DENSITY
DESIGN
REQUIREMENTS FOR LOW DENSITY PROJECTS FROM 021-1.1003
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)
4TO1
5
Maximum velocity in the vegetated conveyances during the 10-year storm?
6
Are curb outlet swales proposed?
Yes
7
Maximum longitudinal slope of curb outlet swale(s) (%)
1%
8
Bottom width of curb outlet swale(s) (feet)
2 ft
9
Maximum side slope of curb outlet swale(s) (H:V)
4:1
10
Minimum length of curb outlet swale(s) (feet)
290 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?
No
13
Have stormwater outlets been designed to prevent downslope erosion?
Yes
14
JAre variations to rule .1003 proposed?
No
ADDITIONAL INFORMATION
15 iPlease use this space to provide any additional information about this low density project:
Flow depth (ft)
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