SW6191004_SuppEZ-2018-Version-2.1.1_rev01_SW6191004_1/22/2020

SUPPLEMENT-EZ COVER PAGE
FORMS LOADED
INFORMATION
act Name
Wetland Area
Water Area (e
this project High or Low Density?
)es this Droiect use an off -site SCM?
MULTIPURPOSE TRAINING FACILITY, SOTF
figh
No
COMPLIANCE WITH 02H .1003(4
7
Width of ve etated setbacks provided feet N/A
8
Will the vegetated setback remain vegetated?
9
Is BUA other that as listed in .1003 4 c-d out of the setback?
10
Is streambank stabilization proposed on this project? No
NUMBER AND TYPE OF SCMS:
11
Infiltration System
2
12
Bioretention Cell
0
13
Wet Pond
0
14
Stormwater Wetland
0
15
Permeable Pavement
0
16
Sand Filter
0
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
0
22
1 Dry Pond
0
23
StormFilter
0
24
Silva Cell
0
25
Ba filter
0
26
Filterra
0
FORMS LOADED
DESIGNER CERTIFICATION
27
Name and Title:
Dan Saltsman, PE
28
Organization:
Stantec
29
Street address:
801 Jones Franklin Rd, Suite 300
30
City, State, Zip:
Raleigh, NC 27606
31
Phone numbers :
919-532-2331
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.
Designer
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Signature of Designer
1/16/2020
Date

DRAINAGE AREAS
1 1Is this a hiah densitv oroiect?
2 If so, number of drainage areas/SCMs
Is all/part of this project subject to previous rule
3 versions?
FORMS LOADED
Yes
2
No
DRAINAGE AREA INFORMATION
Entire Site
1
2
4
Type of SCM
Total BUA in project (sq ft
New BUA on subdivided lots (subject to permitting)
(sq ft
Infiltration Basin
Infiltration Basin
5
37662 sf
6
11282 sf
26380 sf
6045 sf
7
New BUA outside of subdivided lots (subject to
ermittin s
37662 sf
8
Offsite - total area (sq ft
4261 sf
9
Offsite BUA (sq ft
10
Breakdown of new BUA outside subdivided lots:
- Parking (sq ft
- Sidewalk (sq ft
- Roof (sq ft
13137 sf
2352 sf
10785 sf
- Roadway s ft
- Future (sq ft
- Other, please specify in the comment box
below (sq ft
24525 sf
8930 sf
15595 sf
11
New infiltrating permeable pavement on
subdivided lots (sq ft
12
New infiltrating permeable pavement outside of
subdivided lots (sq ft
13permitting)
Exisitng BUA that will remain (not subject to
s ft
Existing BUA that is already permitted (sq ft
14
15 Existing BUA that will be removed s ft
16 Percent BUA 24%
17 Design storm inches 1 in
18 Design volume of SCM cu ft 3487 cf
19 Calculation method for design volume Simple
ADDITIONAL INFORMATION
Please use this space to provide any additional information about the
20 drainage area(s):
Note Line Item #18 Design Volume is considered the required volume for
each drainage area/the site.
36%
27%
1 in
1 in
976 cf
2381 cf
Simple
Simple

INFILTRATION SYSTEM
1
1Drainage area number
1
2
2 IDesign volume of SCM (cu ft) 976 cf 2381 cf
SENERAL MDC FROM 02H .1050 .
3 Is the SCM sized to treat the SW from all surfaces at build -out? Yes Yes
4
Is the SCM located away from contaminated soils?
Yes
Yes
5
What are the side slopes of the SCM (H:V)?
3:1
3:1
6
Does the SCM have retaining walls, gabion walls or other engineered side slopes?
No
No
7
Are the inlets, outlets, and receiving stream protected from erosion (10-yearstorm)?
Yes
Yes
8
Is there an overflow or bypass for inflow volume in excess of the design volume?
Yes
Yes
9
What is the method for dewaterina the SCM for maintenance?
Pump (preferred)
Pump (preferred)
1 u I IT appucaoie, vwu me ouiv1 oe cteanea our arrer construction r
11 Does the maintenance access comply with General MDC (8)? Yes Yes
12 Does the drainage easement comply with General MDC (9)?
If the SCM is on a single family lot, does (will?) the plat comply with General MDC
13 (10)?
14 Is there an O&M Agreement that complies with General MDC (11)?
15 Is there an O&M Plan that complies with General MDC (12)?
16 1 Does the SCM follow the device specific MDC? Yes Yes
17 lWas the SCM designed by an NC licensed professional? Yes Yes
INFILTRATION SYSTEM MDC FROM 02H .1051
18
Proposed slope of the subgrade surface (%)
0%
0%
19
jAre terraces or baffles provided?
No
No
20
IType of pretreatment:
Other
Other
I soils [)Ora
21
Was the soil investigated in the footprint and at the elevation of the infiltration
system?
Yes
Yes
22
SHWT elevation (fmsl)
>237.75
219.16
23
Depth to SHWT per soils report (in)
>93
64.00
24
Ground elevation at boring in soils report (fmsl)
240.83
225.25
25
Is a detailed hydrogeologic study attached if the separation is between 1 and 2 feet.
26
ISoil infiltration rate (in/hr)
3.30
2.02
27
1 Factor of safety (FS) (2 is recommended):
2.00
2.00
I Elevaflnns
29
Bottom elevation (fmsl)
240.83 ft
223.77 ft
30
IStorage elevation (fmsl)
244.50 ft
224.67 ft
31
1 Bypass elevation (fmsl)
244.50 ft
224.67 ft
For Basins Only
32 Bottom surface area, ft2: 724 ft 2855 ft
33 IStorage elevation surface area (ft2) 1216. ft 2855. ft
For Trenches Only
36 1 Perforated pipe diameter, if applicable (inches) N/A
37 Number of laterals N/A
38 ITotal length of perforated piping N/A
39 IStone tvoe. if applicable #57. Washed
411
lis stone Tree oT Tines!
Yes
42
Is the stone wrapped in geotextile fabric?
Yes
43
Has at least one infiltration port been provided?
Yes
Volumes/Drawdown
44
Design volume of SCM (cu ft)
976 cf
2381 cf
rmase use inls space to provlae any aaa¢Iona1 Inrormanon aooui me InT1¢rarlon
46 system(s):
Note: Design Volume of SCM is the calucated required volume for water quality.See
attached O+M letter for Ft. Bragg compliance. Line 24 reflects the elevation at which
the infiltration tests were performed, for surface elevation of SHWT add the depth
from Line 23 to the SHWT elevation in Line 22.
Infiltration 3 2:04 PM 1/16/2020