SW1210802_Supplement-EZ Form_20211006

SUPPLEMENT-EZ COVER PAGE
FORMS LOADED
PROJECT INFORMATION
1 Project Name Pardee Partners ASC (High Density)
2
Project Area ac
3.31
3
Coastal Wetland Area ac
0
4
Surface Water Area ac
0
5
Is this pro'ect High or Low Density?
High
6
IDoes this project use an off -site SCM?
No
COMPLIANCE WITH 02H .1003(4)
7
Width of vegetated setbacks provided feet
NA
8
Will the vegetated setback remain vegetated?
N/A
9
If BUA is proposed in the setback, does it meet NCAC 02H.1003 4 c-d ?
N/A
10
Is streambank stabilization proposed on this project?
No
NUMBER AND TYPE OF SCMs:
11
Infiltration System
12
Bioretention Cell
1
13
Wet Pond
14
Stormwater Wetland
15
Permeable Pavement
16
Sand Filter
17
Rainwater Harvesting RWH
18
Green Roof
19
Level Spreader -Filter Strip LS-FS
20
Disconnected Impervious Surface DIS
21
Treatment Swale
22
1 Dry Pond
23
StormFilter
24
Silva Cell
25
Ba filter
26
Filterra
FORMS LOADED
DESIGNER CERTIFICATION
27
Name and Title:
Jared L. DeRidder, P.E.
28
Organization:
WGLA Engineering, PLLC
29
Street address:
724 5th Avenue West
30
City, State, Zip:
Hendersonville, NC 28739
31
Phone numbers :
828-687-7177
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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DRAINAGE AREAS
1
Is this a hicih density ro'ect?
Yes
2
If so, number of drainage areas/SCMs
1
{ 3
Does this project have low density areas?
No
4
If so, number of low density drainage areas
0
5
Is all/part of this project subject to previous rule
versions?
No
FORMS LOADED
{DRAINAGE AREA INFORMATION
Entire Site
1
4
Type of SCM
Bioretention
5
Total drainage area (sq ft
85378
6
Onsite drainage area (sq ft
85378
7
Offsite drainage area (sq ft
0
8
Total BUA in project (sq ft
r
71874 sf
9
New BUA on subdivided lots (subject to permitting)
(sq ft
NA J
10permitting)
New BUA not on subdivided lots (subject to
s
NA
11
Offsite BUA (sq ft
NA
12
Breakdown of new BUA not on subdivided lots:
NA
- Parking (sq ft
NA
- Sidewalk (sq ft
NA
- Roof (sq ft
NA
-Roadway (sq ft)
NA
- Future (sq ft)
NA
- Other, please specify in the comment box
below (sq ft
NA
13
New infiltrating permeable pavement on
subdivided lots (sq ft
NA
14
New infiltrating permeable pavement not on
subdivided lots (sq ft
NA
15permitting)
Existing BUA that will remain (not subject to
s ft
NA
16
Existing BUA that is already permitted (sq ft)
NA
17
Existing BUA that will be removed (sq ft
NA
18
1 Percent BUA
84%
19
Design storm inches
IL
1.0 in
20
Design volume of SCM cu ft
6184 cf
21
Calculation method for design volume
Average End
{ADDITIONAL INFORMATION
22
Please use this space to provide any additional information about the
drainage area(s):

BIORETENTION CELL
1
1Drainage area number
1 1
2
1 Minimum required treatment volume cu ft
5746 cf
GENERAL 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)?
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-year storm)?
Yes
8
Is there an overflow or bypass for inflow volume in excess of the
design volume?
Yes
9
lWhat is the method for dewatering the SCM for maintenance?
Pump (preferred)
10
If applicable, will the SCM be cleaned out after construction?
N/A
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
15
Is there an O&M Plan that complies with General MDC (12)?
Yes j
16
Does the SCM follow the device specific MDC?
Yes j
17
Was the SCM designed by an NC licensed professional?
Yes j
BIORETENTION
CELL MDC FROM 02H .1052
18
SHWT elevation (fmsl)
2171.50 j
19
Bottom of the bioretention cell (fmsl)
2173.50 j
20
Ponding depth of the design storm (inches)
12 in
21
Surface area of the bioretention cell (square feet)
5592 sf j
22
Design volume of SCM (cu ft)
6184 cf j
23
Is the bioretention cell used for peak attenuation?
Yes
24
Depth of peak attenuation over planting surface (in)
22 in
25
Height of peak attenuation outlet above the planting surface (in)
12 in i
26
Infiltration rate of the in situ soil (inch/hour)
j
27
Diameter of the underdrain pipes (if applicable)
6 in j
28
Does the design include Internal Water Storage (IWS)?
Yes
29
if so, elevation of the top of the IWS (fmsl)
2072.35 j
30
Elevation of the planting surface (fmsl)
7077 j
31
What type of vegetation will be planted? (grass, trees/shrubs,
other)?
Grass
32
Media depth (inches)
30 in
33
Percentage of medium to coarse washed sand by volume
75-85%
34
Percentage of fines (silt and clay) by volume
8-10% j
35
Percentage of organic matter by volume
5-10% j
36
Type of organic material
Pine Bark Fines j
37
Phosphorus Index (P-Index) of media (unitless)
<50
38
Will compaction be avoided during construction?
Yes
39
Will cell be maintained to a one inch/hour standard?
Yes
40,
Depth of mulch, if applicable (inches)
NA j
41
Type of mulch, if applicable
NA j
42
How many clean out pipes are being installed?
5 i
43 1
Type of pretreatment that will be used:
Rip -Rap Outlet j
ADDITIONAL INFORMATION
44 Please use this space to provide any additional information about the
bioretention cell(s):
I
Bioretention 3 3:34 PM 9/27/2021