SW3240305_Supplement-EZ Form_20240611

SUPPLEMENT-EZ COVER PAGE
F RMS LOADED
PROJECT INFORMATION
O P Name Blackwelder Retail 100k0/Substation Project
Area ac 9.64
©Coastal Wetland Area•ac 0
NM Surface Water Area(ac) 0
Is this project High or Low Density? Low
Does this project use an off-site SCM? No
COMPLIANCE WITH 02H.1003(4)
7 Width of vegetated setbacks provided(feet) _ 0
8 W III the vegetated setback remain vegetated? WA_
9 If BUA Isproposed in the setback,does it meet NCAC 02H.1003(4)(c-d)? nfa____10 EIs streambank stabilization proposed on this project? I No
NUMBER AND TYPE OF SCMs:
11 Infiltration System 0
12 Biorelention Cell 0 13 Wet Pond 0 --J
14 Stormwaler Wetland 0
15 _Permeable Pavement 0
16 Sand Filter 0
17 _Rainwater Harvestins RWH1 - 0
18 Green Roof 0
19 Level Spreader-Filer Strip(LS-FS) _ - 0
20 Disconnected Impervious SurfacefDiS)_ _ 0_
21 Treatment Swale 0
22 Ory Pond 0
23 StormFilter 0
24 Silva Cell 0
25 Bayilter 0
26 Filterra 0
FORM) ADED
DESIGNER CERTIFICATION
27 Name and Title: 1 Jamie Gollings
28 Organization Jacobs
29 Street address 111 Corning Rd STE 200 _
30 Ci y,State,Z 0: - Cary,NC 27518
31 Phone number si -. 919-600-1163
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 th e
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
°•it•SSioy 9�: �.
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:a. SEAL tr; '- Signatur es goer
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Date

DRAINAGE AREAS
1 Is this a high density project? No
2 If so,number of drainaLe areas/SCMs 0
3 Does this project have low density areas? Yes
4 If so,number of low density drainage areas 2
�Is all/part of this project subject to previous rule
5 versions? No
FORMS LOADED
DRAINAGE AREA INFORMATION Entire Site LD 1 LD 2
4 'Type of SCM N/A N/A N/A
5 Total drainage area(sq ft) 450,104 247.197 172.769
6 I Onsite drainage area(sq ft) 450104 247.197 172,769
7 Offsite drainage area(sq ft) 0 0 0
8 Total BUA in project(sq ft) 5543 sf 5543 et 0
New BUA on subdivided lots(subject to permitting)
9 (sq ft) 5543 sf 5543 sf 0
New BUA not on subdivided lots(subject to
10 permitting)(sf) 0 0 0
11 Otfsite BUA(sq ft) 0 0 0
12 Breakdown of new BUA not on subdivided lots:
-Parking(sq ft) 0 0 0
-Sidewalk(sq ft) 0 0 0
_ •Roof(sift) 0 0 0
•Roadway(sq ft) 0 0 0
-Future(sq ft) 0 0 0
-Other,please specify in the comment box below
(sq ft) 5543 sf 5543 sf 0
New infiltrating permeable pavement on subdivided
13 Jots(sq ft) N/A N/A N/A
New infiltrating permeable pavement not on
14 subdivided lots(sq ft) N/A N/A N/A
Existing BUA that will remain(not subject to
15 permitting)(sq ft) 0 0 0
16 Existing BUA that is already permitted(sq ft) 0 0 0
17 Existing BUA that will be removed(sq ft) 0 0 0
18 Percent BUA 1% 2% 0%
19 Design storm(inches) 1.0 in 1.0 in 1.0 in
20 Design volume of SCM(cu ft) N/A N/A N/A
21 Calculation method for design volume N/A N/A .N/A
ADDITIONAL INFORMATION
Please use this space to provide any additional information about the
22 drainage area's):
Other-concrete foundations for equipment and concrete footings for steel
lattice structures.Per NC Stormwater Manual,stone can be considered
pervious ff vehicular traffic is minimal.Expected site traffic to be 1-2 visits per
month.Gravel on site to be considered pervious.

LOW DENSITY
OMOIH.1003 _ _
1 Is project below density thresholds set forth in the applicable stormwater rile? Yes
2 +Does proved maximize dispersed flow and minimize channelizalion of Bow? Y64
3 Has the use of piping been minimized per-1003(2hc)? Yes
4 ,,Side slopes of the vegetated conveyances I W V) WA
5 1Maximum velocity in the vegetated conveyances during the 10-year storm? N/A
jArs curb outlet swales proposed? No
7 Maximum longitudinal slope of curb ou0et swale(sl 1%) N/A
8 • Bottom width of curb outlet swale(s)(feet) N/A
9 Maximum side slope of curb oullet swale',s H:V I WA
10 Minimum length of curb outlet swale(s (feel) WA
11 Are treatment swales used instead of curb outlet swales? No
12 Is stormwater released at the edge of the setback as dispersed flow? Yes
13 Have stormwater outlets been designed to prevent downslope erosion? Yes
14 Are variations to rule.1003 proposed? No
ADDITIONAL INFORMATION __
15 Please use this space to prov de any additional[rift:matron about this ow density protect: _ —
Flow on site handled by dispersed flow.
Swale Drain". 1 BUA Pelvic r 0 a Slope VA.,. I V.,r Flow depth
Ares
fact1�1 # Mc)
(roe) (% (fps) (1pa) (N)
3
4
7
110 n
j 1
11
12
13 -
14
1s
le
17
19
19
20
21
22
23
24
25
28
27
28
29 �_