SW1210902_Supplement-EZ Form_20211124

SUPPLEMENT-EZ COVER PAGE
FORMS LOADED
PROJECT INFORMATION
1
Project Name
Broadpointe Industrial Facility
2
Project Area ac
3
Coastal Wetland Area ac
0
4
Surface Water Area ac
0.006
5
Is this roiect h or Low De—ify)
Hi
High
6
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 stream bank 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
IRainwater 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
iStormFilter
0
24
Silva Cell
0
25
Ba filter
0
26
lFilterra
0
LOAD SUPPLEMENT FORMS
DESIGNER CERTIFICATION
27
Name and Title:
_
Daniel Hyatt
28
Or anization:
Wade Trim Inc.
29
Street address:
53 North Market Street
30
City, State, Zip:
Asheville, NC 28801
31
JPhone numbers :
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 informations provided here.
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DRAINAGE AREAS
1
Is this a high density project?
Yes
2
If so, number of drainage areas/SCMs
1
3
Does this roiect have low densit 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
AREA INFORMATION
Entire Site
1
LID 1
4
T pe 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
0
0
0
8
Total BUA in project (sq ft
223399 sf
216801 sf
6599 sf
9permitting)
New BUA on subdivided lots (subject to
s ft
N/A
N/A
N/A
10permitting)
New BUA not on subdivided lots (subject to
s
223399 sf
216801 sf
6599 sf
11
Offsite BUA (sq ft
sf
sf
sf
12
1 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 s 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
15permitting)
Existing BUA that will remain (not subject to
s ft
N/A
N/A
N/A
16
Existina 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
13059 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.

SAND FILTER
1 11Drainage area number I DA-SF 1
MDC FROM 02H .1050
3
Is the SCM sized to treat the SW from all surfaces at build -out?
Yes
4
Is the SCM located away from contaminated soils?
Yes
5
What are the side slopes of the SCM (H:V)?
2:1
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- ear 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 ?
N/A
14
Is there an O&M Agreement that complies with General MDC (11)?
Yes
151
Is there an O&M Plan that complies with General MDC (12)?
1 Yes
161
Does the SCM follow the device specific MDC?
Yes
17
Was the SCM desi ned bv an NC licensedprofessional?
Yes
SAND FILTER
MDC FROM 02H .1056
18
SHWT elevation (fmsl)
N/A
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
I Sediment Chamber
23
I
Volume that can be retained in the sediment chamber (cubic feet) 11038 cf
Will there be a permanent pool in the sediment chamber? No
Bottom of the sediment chamber (fmsl) 2057.50
24
25
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
29
Elevation of top of weir between chambers (fmsl)
2059.5
Sand Chamber
30
Volume that can be retained in the sand chamber (cubic feet)
13390 cf
31
Bottom of the sand chamber (fmsl)
2056.50
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
351
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)
20 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
ADDITIONAL INFORMATION
43
Please use this space to provide any additional information about the
sand filter(s):