SW6191101_Supplement-EZ Form_20200113

SUPPLEMENT-EZ COVER PAGE
FORMSLOADFD
PROJECT INFORMATION
1
jProject Name
SOF Combat Medic Training Facility PN 85958
2
1 Project Area ac
2.93
3
[Coastal Wetland Area ac
0
4
1 Surface Water Area ac
0.02
5
Is this. o'ect Hi h or Low Densit ?
_
High
6
IDoes this project use an off -site SCM?
No
COMPLIANCE WITH 02H.1 003U�4
7
jWidth of vegetated setbacks provided feet
30
8
lWill the ve etated setback remain ve etated?
Yes
9
lis BUA other that as listed in .1003 4 c-d out of the setback?
Yes
10
Ils streambank stabilization proposed on this project?
No
NUMBER AND TYPE OF SCMs:
11
llnfiltration System
1
12
JBioretention Cell
0
13
Wet Pond
0
14
Stormwater Wetland
0
15
Permeable Pavement
0
16
ISand Filter
0
17
lRainwater Harvestin RWH
0
18
Green Roof
0
19
Level Spreader -Filter Strip LS-FS
0
20
Disconnected Im ervious Surface (DIS
0
21
Treatment Swale
0
22
Dry, Pond
0
23
StormFilter
Silva Cell
Bayfilter
Filterra
0
24
0
25
0
26
0
FORMS LOADED
DESIGNER CERTIFICATION
27 Name and Title;
28
30 1 City,State
31 Phone nun
32 Email:
Jason Sesler, PE
801 Jones Franklin Rd. Suite 300
919-325-4777
[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.
6k==ZU4---
Sig6cfre of Designer
of -13 -;OAm
Date

DRAINAGE AREAS
1
Is this a high densityproject?
Yes
2
If so, number of drainage areas/SCMs
1
3
Is all/part of this project subject to previous rule
versions?
No
FORMS LOADED
DRAINAGE AREA INFORMATION
Entire Site
1
4
Type of SCM
Infiltration Basin
5
Total BUA in project (sq ft
55300 sf
27990 sf
6
New BUA on subdivided lots (subject to permitting)
(sq ft
7
New BUA outside of subdivided lots (subject to
ermittin s
27500 sf
24490 sf
8
Offsite -total area (sq ft
9
Offsite BUA (sq ft
10
Breakdown of new BUA outside subdivided lots:
- Parking (sq ft
-Sidewalk (sft
2030 sf
720 sf
- Roof (sq ft
19460 sf
19460 sf
- Roadway s ft
5110 sf
3700 sf
- Future (sq ft
- Other, please specify in the comment box
below (sq ft
900 sf
610 sf
11
New infiltrating permeable pavement on
subdivided lots (sq ft
12
New infiltrating permeable pavement outside of
Isubdivided lots (sq ft
13
Exisitng BUA that will remain (not subject to
ermitting) (sq ft
27800 sf
3500 sf
14
Existing BUA that is already ermitted (sq ft
15
Existing BUA that will be removed (sq ft
16
Percent BUA
43%
67%
17
Desi n storm inches
1 in
1 in
18
1 Design volume of SCM cu ft
2063 cf
2273 cf
19
1 Calculation method for design volume
Simple
Simple
ADDITIONAL INFORMATION M_
Please use this space to provide any additional information about the
20 drainage area(s):
Item 10: Other impervious areas are water meter, concrete pads, concrete
stoops, and pond retaining wall. Item 18: Design Volume is considered the
required volume for each drainage area/the site.

INFILTRATION SYSTEM
H1 Drainage area number 1
2 Design volume of SCM (cu ft) 2273 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)? :1
6
Does the SCM have retaining walls, gabion walls or other engineered side slopes?
Yes
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
What 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)?
N/A
13
If the SCM is on a single family lot, does (will?) the plat comply with General MDC
(10)?
N/A
Yes
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)?
Yes
16
Does the SCM follow the device specific MDC?
Yes
17 Was the SCM designed by an NC licensed professional? Yes
INFILTRATION SYSTEM MDC FROM 02H .1051
18
Proposed slope of the subgrade surface (%)
0%
19
Are terraces or baffles provided?
No
20
Type of pretreatment:
Other
I.snils nato
21
Was the soil investigated in the footprint and at the elevation of the infiltration
system?
Yes
22
SHWT elevation (fmsl)
222.25
23
Depth to SHWT per soils report (in)
81.00
24
Ground elevation at boring in soils report (fmsl)
229.00
[EFa
detailed hydrogeologic study attached if the separation is between 1 and 2 feet?
N/A
infiltration rate (in/hr)
8.00
or of safety (FS) (2 is recommended):
2.00
i t1evanons
29
Bottom elevation (fmsl)
226.50 ft
30
IStorage elevation (fmsl)
228.00 ft
31
1 Bypass elevation (fmsl)
228.00 ft
For Basins Only
32 Bottom surface area, ft2: 1800 ft
33 IStorage elevation surface area (ft) 1915. ft
For Trenches Only
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 void ratio (%)
41 Is stone free of fines?
42 Is the stone wrapped in geotextile fabric?
43 Has at least one infiltration port been provided?
Volumes/Drawdown
44 IDesign volume of SCM (cu ft) 2273 cf
45 ITime to drawdown (hours) 4 hrs
ADDITIONAL INFORMATION
Please use this space to provide any additional information about the infiltration
46 system(s):
Item 20, pretreatment consists of a sump inlet upstream of infilt. basin @ CB-4 with a
water quality trash guard installed. Item 26, in order to be conservative in design, soil
infiltration rate of 8.0 in/hr used and rate is less than geotechnical result of 16.43
in/hr. See attached O+M letter for Ft. Bragg compliance.
Infiltration 3 10:49 AM 1/13/2020