SW5220102_Supplement-EZ Form_20220428

SUPPLEMENT-EZ COVER PAGE
FORMS LOADED
:CT INFORMATION
Project Name
Project Area (ac)
Coastal Wetland Area (ac)
Surface Water Area (ac)
Is this proiect High or Low Densitv?
EAST NASH SOLAR ARRAY
318
0
7.6
Low
COMPLIANCE WITH 02H .1003 4
7
Width of vegetated setbacks provided (feet)
50
8
Will the vegetated setback remain vegetated?
Yes
9
If BUA is proposed in the setback, does it meet NCAC 02H.1003(4)(c-d)?
N/A
10
Is streambank stabilization proposed on thisproject?
No
NUMBER AND TYPE OF SCMS:
11
Infiltration System
0
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
Dry Pond
0
23
StormFilter
0
24
Silva Cell
Bayfilter
Filterra
0
25
0
26
0
FORMS LOADED
ESIGNER CERTIFICATION
27
Name and Title:
GREGORY R. HOFFMAN, P.E.
28
Organization:
CIVIL DESIGN CONCEPTS, PA
29
Street address:
168 PATTON AVE
30
City, State, Zip:
ASHEVILLE, NC 28801
31
Phone number(s):
[phone]
32
Email:
GHOFFMAN CDCGO.COM
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.
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DRAINAGE AREAS
1
Is this a high density project?
No
2
If so, number of drainage areas/SCMs
0
3
Does this project have low density areas?
Yes
4
If so, number of low density drainage areas
1
5
Is all/part of this project subject to previous rule
versions?
No
FORMS LOADED
SRAII
AREA INFORMATION
Entire Site
LID 1
4
Type of SCM
N/A
N/A
5
Total drainage area (sq ft)
13852080
13852080
6
Onsite drainage area (sq ft)
13852080
13852080
7
Offsite drainage area (sq ft)
N/A
N/A
8
Total BUA in project (sq ft)
310858 sf
310858 sf
9
New BUA on subdivided lots (subject to
permitting) (sq ft)
N/A
N/A
10
New BUA not on subdivided lots (subject to
permitting) (sf)
310858 sf
310858 sf
11
Offsite BUA (sq ft)
N/A
N/A
12
Breakdown of new BUA not on subdivided lots:
Parking (sq ft)
N/A
N/A
Sidewalk (sq ft)
N/A
N/A
Roof (sq ft)
N/A
N/A
Roadway (sq ft)
238904 sf
238904 sf
Future (sq ft)
N/A
N/A
Other, please specify in the comment box
below (sq ft)
71954 sf
71954 sf
13
New infiltrating permeable pavement on
subdivided lots (sq ft)
N/A
N/A
14
New infiltrating permeable pavement not on
subdivided lots (sq ft)
N/A
N/A
15
Existing BUA that will remain (not subject to
permitting) (sq ft)
N/A
N/A
16
Existing BUA that is already permitted (sq ft)
N/A
N/A
17
Existing BUA that will be removed (sq ft)
64538 sf
64538 sf
18
Percent BUA
2%
2%
19
j Design storm (inches)
6.8 in
6.8 in
20
Design volume of SCM (cu ft)
N/A
N/A
21
Calculation method for desi n volume
RATIONAL
RATIONAL
ADDITIONAL INFORMATION
22
Please use this space to provide any additional information about the
drainage area(s)7
Transformer Pads BUA and Substation BUA included in "Other" section. 1440
square feet for the 9 inverter pads and 70514 square feet for the substation
pad.

LOW DENSITY
DESIGN REQUIREMENTS FOR LOW DENSITY PROJECTS FROM 021-11.1003
1
Is project below density thresholds set forth in the applicable stormwater rule?
Yes
2
Does project maximize dispersed flow and minimize channelization offlow?.
Yes
3
Has the use of piping been minimized per. 1003(2)(c)?
Yes
4
Side slopes of the vegetated conveyances (H:V)
(3:1)
5
Maximum velocity in the vegetated conveyances during the 10-year storm?
5.43
6
Are curb outlet swales proposed?
No
7
Maximum longitudinal slope of curb outlet swale(s) (% )
N/A
8
Bottom width of curb outlet swale(s) (feet)
N/A
9
Maximum side slope of curb outlet swale(s) (H:V)
N/A
10
Minimum length of curb outlet swale(s) (feet)
N/A
11
Are treatment swales used instead of curb outlet swales?
No
12
Is stormwater released at the edge of the setback as dispersed flow.?
N/A
13
Have stormwater outlets been designed to prevent downslope erosion?
Yes
14
lAre variations to rule .1003 -nosed?
No
ADDITIONAL
INFORMATION OF-
15
Please use this space to provide any additional information about this low density project: