SW6230603_Supplement-EZ Form_20240201

SUPPLEMENT-EZ COVER PAGE
FORMS LOADED
PROJECT INFORMATION )
1 Project Name Aberdeen US 15-501 Dollar General
2 Protect Area(ac) 2.29 i
3 Coastal Wetland Area(ac)
4 Surface Water Area(ac)
5 Is this project High or Low Density? High (
6 Does this project use an off-site SCM? No
COMPL
IANCE WITH 02H.1403(4) <"m„VM4-rn.,_
7 iWidth of vegetated setbacks provided(feet) 30' I
8 Will the vegetated setback remain vegetated? N/A
9 If BUA isproposed in the setback,does it meet NCAC 02H.1003(4)(c-d)?
10 Ils streambank stabilization proposed on this project?
NUMBER AND TYPE OF SCMs: )
11 ;Infiltration System 1
12 Bioretention Cell
13 'Wet Pond_
14 I Stormwater Wetland i
15 Permeable Pavement I
16 Sand Filter j
17 Rainwater Harvesting(RWH)
18 Green Roof i
19 ,Level Spreader-Filter Strip(LS-FS)
20 iDisconnected Impervious Surface(DIS)
21 Treatment Swale
22 Dry Pond 1
23 sStormFilter j
1
24 Silva Cell
25 Bayfilter
26 :Filterra 1
FORMS LOADED
DESIGNER CERTIFICATION a,�,. ,e, ,.�, ........./41.1„..,..N. ,.a14........ '...... e.
27 ;Name and Title: C. Scott Brown,PE-Vice President
28 iOrganization: 4D Site Solutions, Inc
29 Street address: 409 Chicago Drive,Suite 112
30 City,State,Zip: Fayetteville, NC 28306
31 Phone number(s): 910-426-6777
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 esigner
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• �•NGINEes .
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Seal Date

DRAINAGE AREAS
..... .,...
• ,
1 Its this a high density project? I-- Yes
2 i If so, number of drainage areas/SCMs 1
3 Does this project have low density areas? No
: -
Li 1 If so,number of low density drainage areas .. , 0
Is all/part of this project subject to previous rule I
5 jversions? L No
FORMS LOADED
DRAINAGE AREA INFORMATION. --***1rire Site -1 )
4 Type of SCM I Infiltration basin
5 Total drainage area(sq ft) • 103,324 66552
6 lOnsite drainage area(sq ft) 99,590 61168
7 tOffsite drainage area(sq ft) 3 734 3734
8t Total BUA in project(sq ft) 1 37751 sf 1 37751 sf
New BUA on subdivided lots(subject to
I
1 1
9 ipermittinglleaft)
t 1
i New BUA not on subdivided lots(subject to 1
10 I perm itting)(et) I_ 34017 sf i 34017 sf
11 !1Offsite BUA(e_q_ft) I 3734 sf I 3734 sf i
; i 1
12 Breakdown of new BUA not on subdivided lots: I k
Pa r ki pg(sq ft) 23377 sf 23377 sf I
1
' -Sidewalk(sg ft)
I
-Rool(sq ft) 1 10640 sf 10640 sf i
......................Roadway/sq ft).
Future fsgft) :
I -Other, please specify in the comment box
_i•below/eV-0_ l• '
New infiltrating permeable pavement on
13 Lsubdivided lots(eg_ft)
New infiltrating permeable pavement not on [ .
14 4isubdivided lots ... . . ,
lExisting BUA that will remain(not subject to
15 permitting)(sq ft) I 1025 sf 1025 sf 1
16 rExisting BUA that is already permitted(sq ft)
; .
17 ;Existing BUA that will be removed(sq ft)
18 Percent BUA 37% 57%
1.
19 I.Deeign storm kinches) 1.0 in 1.0 in
20 i Design volume of SCM(Cu ft)
i :. 3188 of
21 ;Calculation method for design volume simple
ADDITIONAL INFORMATION
[Please use this space to provide any additional information about the 1
22 klrainage area(s): I
1
........twowamomm.......enc... mr........,........gunsmnx.......ftj

INFILTRATION SYSTEM
_1 ADrainage area number 1
2 I Minimum re uired treatment volume cu ft 3109 cf --1j
GENERAL MDC FROM 02H.1050
build-out?
4 Os the SCM located away from contaminated soils? Yes
5 What are the side slopes of the SCM(H:V or enter"Vertical"for F (
(trenches)? 3:1 P
d
6 !Does the SCM have retaining walls,gabion walls or other
enprneered side slopes? No
10- ear storm)?
7 Yes
Are the inlets,outlets,and receiving streamprotected from erosion
8 Ills 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? i Pump(preferred)
10 I If applicable will the SCM be cleaned out after construction? b Yes
11 1,Does the maintenance access comply with General MDC(8)? Yes
12 I Does the drainage easement comply with General MDC(9)? Yes
If the SCM is on a single family lot,does(will?)the plat comply with
13 ',General MDC(10)? N/A
14 !Is there an O&M Agreement that complies with General MDC(11)?IYes
15 GIs there an O&M Plan that complies with General MDC(12)? Yes
16 T Does the SCM follow the device specific MDC? . Yes
17 ,Was the SCM deli ned b an NC licensed rofessional? Yes
INFILTRATION SYSTEM MDC FROM 02H.1051
11'. - . ,
18 ;Proposed slope of the subgrade surface(%) 067°
19 HAre terraces or baffles provided? No
20 JType ofpretreatment. t Other
Soils Data
21 I Was the soil investigated in the footprint and at the elevation of the
infiltration system? 1
Yes
4-1
22 +SHWT elevation fmsl 342.08
23 !Depth to SHWT per sods report(m) fi 77.00
24 iGround elevation at boring in soils report(flits)) 1" 348.50
25 ;Is a detailed h dro eolo is study attached if the separation is
I between 1,and 2 feet? N/A
26—(Soil infiltration rate(m/hr) E 0.10
27 l Factor of safety(FS) (2 is recommended): 2.00
Elevations
29 E Bottom elevation(fmsl) I 346 ft
30 4,Storage elevation(fmsl) I 346.33 ft
31 LBypass elevation psi) ; ._. _346 ft
For Basins Only _
32 IBottom surface area(ft2) ___. 10354 ft
33 Storage elevation surface area(t2) 10753.ft 11
For Trenches Only
34 t Length(ft) T
35 tWidth(ft) i_.._
36 _I Perforated pipe diameter, if applicable(inches)
37 !Number of laterals
1
38 +Total length of perforated piping 4
39 I Stone type if applicable
40 ;Stone porosity(%) 4____ .
41 1 Is stone free of fines? i
42 Its! the stone wrapped in geotextile fabric? ,
43 Has at least one inspection port been provided?
Volumes/Drawdown
44 I Design volume of SCM(cu ft) 2924 cf
45 ITime to draw down hours
36 hrs
';ADDITIONAL INFORMATION _
46 I Please use this space to provide any additional information about
r
_ ithe infiltration system(s):
Pretreatment for basin is through a grassed Swale and rass overland flow
Infiltration 1 4:55 PM 1/31/2024