SW6230104_Supplement-EZ Form_20230414

SUPPLEMENT-EZ COVER PAGE
LOAD SUPPLEMENT FORMS
PROJECT INFORMATION
1
Project Name
2
Project Area ac
3
Coastal Wetland Area
4
Surface Water Area (a
Dunn, NC - Petco
1.68
5 1 Is this project High or Low Density? High
6 1 Does this protect use an off -site SCM? No
COMPLIANCE WITH 02H .1003(4)
7
Width of vegetated setbacks rovided feet
5
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 ?
N/A
10
Is streambank stabilization proposed on this project?
No
NUMBER AND TYPE OF SCMs:
11
Infiltration S stem
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 (IS-FS
20
Disconnected Impervious Surface DIS
21
Treatment Swale
22
Dry Pond
23
StormFilter
24
Silva Cell
25
lBayfilter
26
1 Filterra
LOAD SUPPLEMENT FORMS
DESIGNER CERTIFICATION
27
Name and Title:
Andrew Ma sent
28
Or anization:
McClure Engineering Company
29
IStreet address:
335 SE Oralabor Rd
30
ICity, State, Zip:
Ankeny, IA 50021
31
1 Phone numbers :
515-512-1361
32
Email:
I [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.
Seal
Signature of Designer
Date
04.14.2023

DRAINAGE AREAS
1
Is this a high density project?
Yes
2
If so, number of drainage areas/SCMs
2
3
Does this roiect have low densit 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
AREA INFORMATION
Entire Site
1
2
4
T pe of SCM
Bioretention
Bioretention
Bioretention
5
Total drainage area (sq ft
63957
34084
29873
6
Onsite drainage area (sq ft
63957
34084
29873
7
Offsite drainage area (sq ft
0
0
0
8
Total BUA in project (sq ft
46265 sf
31924 sf
14341 sf
9permitting)
New BUA on subdivided lots (subject to
s ft
46265 sf
31924 sf
14341 sf
10permitting)
New BUA not on subdivided lots (subject to
s
sf
sf
sf
11
Offsite BUA (sq ft
sf
sf
sf
12
1 Breakdown of new BUA not on subdivided lots:
0
0
0
Parking (sq ft
sf
21921 sf
7892 sf
Sidewalk (sq ft
sf
4051 sf
1658 sf
Roof (sq ft
sf
5952 sf
4791 sf
Roadway s ft
sf
sf
sf
Future (sq ft
sf
sf
sf
Other, please specify in the comment box
below (sq ft
sf
sf
sf
13
New infiltrating permeable pavement on
subdivided lots (sq ft
sf
sf
sf
14
New infiltrating permeable pavement not on
subdivided lots (sq ft
sf
sf
sf
15permitting)
Existing BUA that will remain (not subject to
s ft
sf
sf
sf
16
Existina BUA that is already permitted (sq ft
sf
sf
sf
17
Existing BUA that will be removed (sq ft
sf
sf
sf
18
Percent BUA
63%
19
Design storm inches
1.0 in
1.0 in
1.0 in
20
Design volume of SCM cu ft
5116 cf
2726 cf
2390 cf
21
Calculation method for design volume
SCS
SCS
SCS
ADDITIONAL INFORMATION
22
Please use this space to provide any additional information about the
drainage area(s):

BIORETENTION CELL
1 Drainage area number _
2 1 Minimum required treatment volume (c�
ERAL 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
g
lWhat is the method for dewatering the SCM for maintenance?
Pump (preferred)
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
15
Is there an O&M Plan that complies with General MDC (12)?
Yes
16
Does the SCM follow the device specific MDC?
Yes
17
Was the SCM designed by an NC licensed professional?
Yes
BIORETENTION
CELL MDC FROM 02H .1052
18
SHWT elevation (fmsl)
164.00
19
Bottom of the bioretention cell (fmsl)
166.25
20
Ponding depth of the design storm (inches)
12 in
21
Surface area of the bioretention cell (square feet)
1814 sf
22
Design volume of SCM (cu ft)
5230 cf
23
Is the bioretention cell used for peak attenuation?
Yes
24
Depth of peak attenuation over planting surface (in)
18 in
25
Height of peak attenuation outlet above the planting surface (in)
18 in
26
Infiltration rate of the in situ soil (inch/hour)
in/hr
27
Diameter of the underdrain pipes (if applicable)
4 in
28
Does the design include Internal Water Storage (IWS)?
yes
29
if so, elevation of the top of the IWS (fmsl)
168
30
Elevation of the planting surface (fmsl)
169.5
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%
35
Percentage of organic matter by volume
5-10%
36
Type of organic material
pine bark fines
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)
41
Type of mulch, if applicable
42
How many clean out pipes are being installed?
2
43
IType of pretreatment that will be used:
Swales
ADDITIONAL INFORMATION
44 Please use this space to provide any additional information about
the bioretention cell(s):
Bioretention 3 7:43 AM 4/14/2023