SW6221004_Supplement-EZ Form_20221021

JVr1—LG111IGItl 1 <+VYGR r/"1VG
FORMS LOADED
PROJECT INFORMATION
1
Project Name
Automotive Maintenance Shop - EEB Holdings, LLC.
2
Project Area ac
4.98
3
Coastal Wetland Area ac
0
4
Surface Water Area ac
0
5
Is this project High or Low Density?
High
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 ?
N/A
10
Is streambank stabilization proposed on this project?
No
NUMBER AND TYPE OF SCMs:
11
Infiltration System
1
12
Bioretention Cell
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
1 Treatment Swale
22
Dry Pond
23
StormFilter
24
Silva Cell
25
Bayfilter
26
Filterra
FORMS LOADED
DESIGNER CERTIFICATION
27
Name and Title:
Kenneth Smith Jr., PE PLS
Smith Site Consultants, PLLC.
121 Bulittle Drive
Linden, NC 28356
910-391-5923
28
Organization:
29
Street address:
30
City, State, Zip:
31
Phone number(s):
32
Email:
[e-mail]
Certification Statement:
I certify, under penalty of law that this Supplement-FZ 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.
���ttttllli
\A CAR 0
2 SEA, L
• Aj 45277
�fl1GlI�C'
Seal
Signature of Designer
Date

JIMAIIVHVC Amr-Aa
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?
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
RAINAGE AREA INFORMATION Entire Site 1
4
Type of SCM
Infiltration Basin
216929
216929
Infiltration Basin "
s 162915
1_6.2915
0_
55550 sf
5
Total drainage area (sq ft
6
Onsite drainage area (sq ft
7
Offsite drainage area (sq ft
0
8
Total BUA in project (sq ft)
55550 sf
9
New BUA on subdivided lots (subject to permitting)
sq ft
New BUA not on subdivided lots (subject to
s
55550 sf
10permitting)
55550 sf
11
Offsite BUA (sq ft
12
Breakdown of new BUA not on subdivided lots:
- Parkin sq ft
29979 sf
29979 sf
- Sidewalk (sq ft)
505 sf
505 sf
- Roof (sq ft)
18000 sf
18000 sf
- Roadway s ft
- Future (sq ft
5066 sf
5066 sf
- Other, please specify in the comment box
below (sq ft)
2000 sf
2000 sf
13
New infiltrating permeable pavement on
subdivided lots (sq ft)
14
New infiltrating permeable pavement not on
subdivided lots (sq ft
15permitting)
Existing BUA that will remain (not subject to
s ft
16
Existing BUA that is already permitted (sq ft)
17
Existing BUA that will be removed (sq ft
18
Percent BUA
26%
34%
19
Design storm inches
1.0 in
1.0 in
!0
Design volume of SCM cu ft
5464 cf
5464 cf
!1
Calculation method for design volume
Simple Method
Simple Method
DDITIONAL INFORMATION
!2
Please use this space to provide any additional information about the
drainage area(s):

INFILTRATION SYSTEM
1 jDrainage area number 1
2 1 Minimum reauired treatment volume (cu ft) I Q54b cf
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
What are the side slopes of the SCM (H:V or enter "Vertical' for
5
trenches)?
3:1
Does the SCM have retaining walls, gabion walls or other engineered
6
side slopes?
No
Are the inlets, outlets, and receiving stream protected from erosion
7
10-yea r storm)?
Yes
Is there an overflow or bypass for inflow volume in excess of the
8
rlecinn vnhlma9
Yes
9
lWhat is the method for dewatering the SCM for maintenance?
Drawdown Orifice
10
1 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)?
f Yes
Is there an O&M Plan that complies with General MDC (12)?
Yes
T15
16
Does the SCM follow the device specific MDC?
Yes
17
Was the SCM designed by an NC licensed professional?
Yes
18
Proposed slope of the subgrade surface (%)
0%
19
Are terraces or baffles provided?
No
20
Type of pretreatment:
Forebay
21
Was the soil investigated in the footprint and at the elevation of the
infiltrations stem?
Yes
22
SHWT elevation (frnsl)
205.46
23
Depth to SHWT per soils report (in)
68.00
24
Ground elevation at boring in soils report (fmsl)
211.13
25
Is a detailed hydrogeologic study attached if the separation is
between 1 and 2 feet?
N/A
26
ISoil infiltration rate (in/hr)
3.40
27
1 Factor of safe (FS) (2 is recommended):
2.00
1 FIAWAtinnc
29
Bottom elevation (fmsl)
208.25
30
Storage elevation (fmsl)
209.25
31
1 Bypass elevation frnsl)
209.25
For Basins Only
32 Bottom surface area(ft) 5,000
33 IStorage elevation surface area(ft) 5,928
F— T—nrhnc nn/v
34
Length (ft)
35
Width (ft)
36
Perforated pipe diameter, if applicable (inches)
37
Number of laterals
38
Total length of perforated piping
39
Stone type, if applicable
40
Stone porosity (%)
41
Is stone free of fines?
42
Is the stone wrapped in geotextile fabric?
43
1 Has at least one inspection port beenprovided?
Volumes/Drawdown
44 IDesign volume of SCM (cu ft) 5464 cf
45 1 Time to draw down (hours) ZU nrs
46 Please use this space to provide any additional information about the
infiltration system(s):
Infiltration 3 10:31 AM 10/12/2022

INFILTRATION SYSTEM
Infiltration 4 10:31 AM 10/12/2022