SW1210902_Supplement-EZ Form_20220215

SUPPLEMENT-EZ COVER PAGE
FORMS LOADED
PROJECT INFORMATION
1 Project Name Broadpointe Industrial Facility
2 Project Area (ac) 7.09
3 Coastal Wetland Area (ac) 0
4 Surface Water Area (ac) 0.006
5 1 Is this project High or Low Density? Both High and Low Density
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
If BUA is proposed in the setback, does it meet NCAC 02H.1003(4)(c-d)?
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 (LS-FS)
0
20
Disconnected Impervious Surface (DIS)
0
21
Treatment Swale
Dry Pond
StormFilter
Silva Cell
Bayfilter
Filterra
0
22
0
23
0
24
0
25
0
26
0
FORMS LOADED
DESIGNER CERTIFICATION
27
IName and Title:
Organization:
Street address:
Daniel Hyatt
28
Wade Trim Inc.
29
53 North Market Street
30
City, State, Zip:
Asheville, NC 28801
31
Phone number(s):
8282551197
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.
CARe
i
�OO � D 5 c�'OF`,�'Y
+ Lu 7d i
* +- No. 1405
y.
♦�`. QL �`' 'T a. y1
ignafu a of Designer
02/10/2022
Date

DRAINAGE AREAS
1
Is this a high density project?
Yes
2
If so, number of drainage areas/SCMs
1
3
Does this project have low density areas?
Yes
4
If so, number of low density drainage areas
1
5
Is all/part of this project subject to previous rule
versions?
No
FORMS LOADED
DRAINAGE AREA INFORMATION
Entire Site
1
LID 1
4
Type of SCM
N/A
Sand Filter
Dispersion Flow
5
Total drainage area (sq ft)
1092049
273174
818875
6
Onsite drainage area (sq ft)
1092049
273174
818875
7
Offsite drainage area (sq ft)
Total BUA in project (sq ft)
New BUA on subdivided lots (subject to
permitting) (sq ft)
0
0
0
8
223399 sf
216801 sf
6599 sf
9
N/A
N/A
N/A
10
New BUA not on subdivided lots (subject to
permitting) (so
223399 sf
216801 sf
6599 sf
11
Offsite BUA (sq ft)
sf
sf
sf
12
Breakdown of new BUA not on subdivided lots:
Parking (sq ft)
97872 sf
91274 sf
6599 sf
Sidewalk (sq ft)
4965 sf
4965 sf
sf
Roof (sq ft)
120562 sf
120562 sf
sf
Roadway (sq ft)
N/A
N/A
N/A
Future (sq ft)
N/A
N/A
N/A
Other, please specify in the comment box
below (sq ft)
N/A
N/A
N/A
13
New infiltrating permeable pavement on
subdivided lots (sq ft)
N/A
N/A
N/A
14
New infiltrating permeable pavement not on
subdivided lots (sq ft)
N/A
N/A
N/A
15
Existing BUA that will remain (not subject to
permitting) (sq ft)
N/A
N/A
N/A
16
Existing BUA that is already permitted (sq ft)
N/A
N/A
N/A
17
Existing BUA that will be removed (sq ft)
N/A
N/A
N/A
18
Percent BUA
21 %
79%
1 %
19
Design storm (inches)
1.0 in
1.0 in
N/A
20
Design volume of SCM (cu ft)
N/A
13417 cf
N/A
21
Calculation method for design volume
N/A
Simple Method
N/A
ADDITIONAL INFORMATION
22
Please use this space to provide any additional information about the
drainage area(s):
LD1 designed to have sufficient dispersion at pipe outlet; sized for 10 yr
storm event.

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. 1 003(2)(c)?
Yes
4
Side slopes of the vegetated conveyances (H:V)
N/A
5
Maximum velocity in the vegetated conveyances during the 10-year storm?
6
JAre curb outlet swales proposed?
No
7
Maximum longitudinal slope of curb outlet swale(s) (% )
8
Bottom width of curb outlet swale(s) (feet)
9
Maximum side slope of curb outlet swale(s) (H:V)
10
Minimum length of curb outlet swale(s) (feet)
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
Are variations to rule .1003 proposed?
No
ADDITIONAL INFORMATION
15 Please use this space to provide any additional information about this low density project:

SAND FILTER
18
SHWT elevation (fmsl)
2046.5 ft
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)
N/A
22
Is this sand filter designed to attenuate peak flows?
No
Sediment Chamber
23
Volume that can be retained in the sediment chamber (cubic feet)
16238 cf
24
Will there be a permanent pool in the sediment chamber?
No
25
Bottom of the sediment chamber fmsl
2057.50
26
Area of the sediment chamber (square feet
1823 sf
27
Physical depth of the sediment chamber inches
12 in
28
Ponding depth in the sediment chamber, above any permanent pool
inches
36 in
291
Elevation of top of weir between chambers (fmsl)
2059.5
I Sand Chamber
30
Volume that can be retained in the sand chamber cubic feet
12845 cf
31
Bottom of the sand chamber fmsl
2059.50
32
Area of the sand chamber(square feet
1823 sf
33
Physical depth of the sand chamber inches
18 in
34
Ponding depth in the sand chamber, above the sand surface
inches
36 in
35
Elevation of the bypass device (fmsl)
2062.5
36
Type of bypass device
Inlet
37
Mechanism for distributing flow over the sand surface
Level Weir
38
Sand specification for sand chamber
ASTM C-33
39
Depth above underdrain pipe (inches)
18 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
Will clean -out pipes be capped?
Yes