SW6230603_Supplement-EZ Form_20240510

SUPPLEMENT-EZ COVER PAGE
FORMS LOADED
PROJECT INFORMATION
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1 Project Name Aberdeen US 15-501 Dollar General I
2 Project Area(ac) 2.29 I
3 ,Coastal Wetland Area(ac)_
4 Surface Water Area(ac)
5 Is this project High or Low Density? High j
6 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? N/A
9 If BUA is proposed in the setback,does it meet NCAC 02H.1003(4)(c-d)?
10 'Is streambank stabilization proposed on this project?
NUMBER AND TYPE OF SCMs:
11 Infiltration System 1
12 Bioretention Cell j
13 ;Wet Pond
1
14 Stormwater Wetland
15 (Permeable Pavement
16 Sand Filter (
17 Rainwater Harvesting(RWH)
18 19 Gr
een Roof I
Level Spreader-Filter Strip(LS-FS) i
20 Disconnected Impervious Surface(DIS) i
21 Treatment Swale i
22 ?Dry Pond _
23 StormFilter i
24 Silva Cell__
25 ;Bayfilter
26 Filterra
FORMS LOADED
DESIGNER CERTIFICATION
27 Name and Title: C. Scott Brown,PE-Vice President _ g
28 Organization: 4D Site Solutions, Inc
29 Street address: 409 Chicago Drive, Suite 112
30 City,State,Zip: Fayetteville, NC 28306
31 'Phone numbers) 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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k I.-.:- . .--1‘1;j• Signature of Designer
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Seal Date

DRAINAGE AREAS
1 Is this a high density project? i Yes
2 I If so,number of drainage areas/SCMs 1
3 l Does this project have low density areas? t No
t
4 I If so, number of low density drainage areas ; 0
Jt
I Is all/part of this project subject to previous rule I ,
5 yersions? i. No ,
I FORMS LOADED I
MAINAGE AREA INFORMATION
4 IJype of-SCIVI t Infiltration basin 1
5 1Total drainage area(sq ft) t 103,324 t
0 66552
6 lOnsite drainage area(sq ft)
ti 99,590 i
62818
• , i 7 jOffsite drainage area(sq ft) t 3,734 3 3734
8 ITotal BUA in project(sq ft) 1, . 37751 sf 37751 sf t
New BUA on subdivided lets(subject to
9 permitting)(sq ft)
New BUA not on subdivided lots(subject to
t t
5 4
10 i pe rm itt i n9)(sf) JJ 34017 sf t 34017 sf
tt t
11 jOffsite BUA(sq ft) t t
„_ 3734 sf
12 !Breakdown of new BUA not on subdivided lots.
ii
-Parking(sq ft) t 23377 sf t 23377 sf i
-Sidewalk(sq ft) I t
t 1
t
-Roof(sq ft) 10640 sf
10640 sf
I -Roadway(sq ft)
vf,f- 1
-Future(sq ft).
-Other, please specify in the comment box i 1
below(sq ft)
New infiltrating permeable pavement on
I I
,1
13 isubdivided lots(sq ft)
1 1
t•
New infiltrating permeable pavement not on t
1 i,k
14 jsubdivided lots(sq ft) I
lExisting BUA that will remain(not subject to f qt
15 tipermitting)(sq ft) 1025 sf • 1 1025 sf
16 !Existing BUA that is already permitted(sq ft) I
17 I Existing BUA that will be removed(sq ft) t i
18 I Percent BUA 34%
d 57%
19 Desan storm(i nc hes)
1.0 in . 1.0 i n
20 DesignvolumeofSCM(cuf) 1 3188c f It,to
21 iCalculation method for design volume simple
ADDITIQNAL INFORPAA110111„
_ _
i Please use this space to provide any additional information about the
i
l 22 i drainage area(s): t
I , .. . t
1 t
I i

NFILTRATtON SYSTEM
area number 1
1 'Minimum rewired t atm treatment volume(cu ft} ,o✓.y q �n . ,y3 3109 cf x 4
2a
J
iENERAL MDC FROM 02H.1050
3 i 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:t
6 Does the SCM have retaining walls,gabion walls or other k
engineered side slopes? No
7 !Are the inlets,outlets,and receiving stream protected from erosion y
10 ear
( Y storm)? Yes
8 Is there an overflow or bypass for inflow volume in excess of the
design volume? Yes 1
9 !What is the method for dewatering the SCM for maintenance? Pump(preferred) t
.t
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 8
16 i Does the SCM follow the device specific MDC? Yes
17 `Was the SCM designed by an NC l censsed rofessional?
Yes
r
NFILTRATION SYSTEM MDC FROM 02H.1051
18 ;proposed slope of the subgrade surface(%) 0%
19 'Are terraces or baffles provided? No
20 'Type of pretreatment: i___. Other
oils Data
21 Was the soil investigated in the footprint and at the elevation of the i
`infiltration system? Yes
22 I SHWT elevation(fins') 342.08
23 {Depth to SHWT per soils report(in) 77.00
24 !Ground elevation at boring in soils report(fmsl) 348.50
25 GIs a detailed hydrogeologic study attached if the separation is
between 1 and 2 feet? N/A
26 !Soil infiltration rate(m/hr) 0.10
27 Factor of safety(FS) (2 is recommended) 2.00
Elevations
29 i Bottom elevation Urns!) ; 346 3 ft
30 Storage elevation(fmsl) 346.6 ft
31 Bypass elevation(fmsi) 347 ft
or Basins Only
32 i Bottom surface area(ft2)
11166 ft
surface Storage elevation surface area(ft') tt53-9.ft
or Trenches Only
34 ]Length(ft)
35 .Width(ft) t
36 JPerforated pipe diameter, if applicable(inches)
37 Number of laterals
38 .Total length of perforated piping t
39 Stone type if applicable
40 ',Stone porosity(%)
41 ;Is stone free of fines?
42 !Is the stone wrapped in 9eotextile fabric?
43 ;Has at least one inspection port been provided?
Volumes/Drawdown
44 Design volume of SCM(cu ft) 3164 cf
45 Time to draw down hours 34 hrs
di-biti rtatiAL 1610ORtiA1lON_ _
46 I Please use this space to provide any additional information about
;the infiltration system(s): i
r<
Pratreatmentfor basin is through agraasad swalaandgrass_overlandflow.Bypass
elevation is 346,6.The r ram is roouudin the din la ed value at 347.
nfiltration 1 2:01 PM 5/10/2024