SW3211202_Supplement-EZ Form_20220223

SUPPLEMENT-EZ COVER PAGE
FORMS LOFIQE[;
PROJECTINFQRMATION..........................�..,._._.....,...,..�.......�..._....._..,_..__.-..__.....___....,,...._.�..�.,..,......,..,....�.,...,...—.._..,,,_..._...v.�..
1
P%sect Name _�
-___TO _PaVW!A"M Road $War.Fa m, U.0 -
3
Coastal Wetland Area
_
— 4
Surface WeterArea �a��w �__
0
5
6
Is thiaproject High or Low Denelty?
Does this project use an off -site SCM?
NO
7
Width of etatad satbaoka vidad l 15
_
_ _h o a _ . fir? .. _�t) �
8
Will the vegetated setback remain vegetated? _ _ _ __. _ — Yea
9
M 9UA Is ProopoaW In the setback, does it meet NCAC 021­1.1003 4-
�^
10
Is streambank stabilization proposed on this project? No�
NUI4
11
D TYPE OF SCMS:
Infiltration System
12
Bioretentlon Cell
13
Pond-,-'—----—---- Wet
Wet
14
__
Storl
t
iS_
_
Permeable Pavement
16
17
Sand FI@er
Rainwater_Hervesbnq (RWWW�
18
Green Roof
19
Level 3 reader -Filter Strip
20
�21^
Disconnected Impervious Surfacee(DIS)___--
23T
24
Treatment Swale
StormFtiter
Suva Cell
Bayfilter_-��..-
_
26
Filters
Title:
Mario T. Carreon, Civil Engineering Manage
Cypress Creek Renewables, LLC
Cettifiotion Statement;
I cerUfy, 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 hest 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.
MIper.�1,'
• SEAI
i
045182 e
Signature of Designer
Date

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?
I No
FORMS LOADED
DRAINAGE AREA INFORMATION
Entire Site
LID 1
4
Type of SCM
DIS
DIS
5
Total drainage area (sq ft)
1359072
6
Onsite drainage area (sq ft)
1359072
7
Offsite drainage area (sq ft)
0
8
Total BUA in project (sq ft)
5439 sf
9
New BUA on subdivided lots (subject to permitting)
(sq ft)
10
New BUA not on subdivided lots (subject to
permitting) (sf)
Offsite BUA (sq ft)
11
12
Breakdown of new BUA not on subdivided lots:
- Parking (sq ft)
- Sidewalk (sq ft)
- Roof (sq ft)
- Roadway (sq ft)
4126 sf
- Future (sq ft)
- Other, please specify in the comment box below
(sq ft)
1313 sf
13
New infiltrating permeable pavement on subdivided
lots (sq ft)
14
New infiltrating permeable pavement not on
subdivided lots (sq ft)
15
Existing BUA that will remain (not subject to
permitting) (sq ft)
16
Existing BUA that is already permitted (sq ft)
17
Existing BUA that will be removed (sq ft)
18
Percent BUA
0.4%
19
Design storm (inches)
N/A
20
Design volume of SCM (cu ft)
N/A
21
Calculation method for design volume
N/A
ADDITIONAL
INFORMATION
Please use this space to provide any additional information about the
22 drainage area(s):
Inverter pads and steel piles supporting the fixed tilt solar panel system.

LOW DENSITY
UIREMENTS FOR LOW DENSITY PROJECTS FROM 02H .1003
oject below density thresholds set forth in the applicable stormwater rule?
Yes
r
s project maximize dispersed flow and minimize channelization of flow?
Yes
the use of piping been minimized per.1003(2)(c)?
Yes
slopes of the vegetated conveyances (H:V)
N/A
5
Maximum velocity in the vegetated conveyances during the 10-year storm?
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
1 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?
Are variations to rule .1003 proposed?
No
14
No
ADDITIONAL
15
INFORMATION
1 Please use this space to provide any additional information about this low density project:
Solar farm construction was completed in 2015 and all project disturbed areas are vegetated. There are no permanent SCMs for
the project - all flow is considered dispersed sheet flow. The project complies with the guidelines outlined in Recomendation 2:
Disconnect runoff from solar panel arrays per NCDEQ Stormwater Design Manual E-6 (Figure 1).
Swale
Drainage
BUA
Pervious
Q
Slope
Vallow
Vactual
Flow depth
#
Are
(ac)
area
C
(cfs)
(%)
(fps)
(fps)
(ft)
(ac1
32.20
0.12
32.08
0.40
2
3
4
5

DISCONNECTED IMPERVIOUS
SURFACES (DIS)
GENERAL MDC FROM 02H.1050
1
Is the SCM sized to treat the SW from all surfaces at build -out?
Yes
2
Is the SCM located away from contaminated soils?
Yes
3
What are the side slopes of the SCM (H:V)?
15:1
4
Does the SCM have retaining walls, gabion walls or other
engineered side slopes?
Are the inlets, outlets, and receiving stream protected from erosion
(10-year storm)?
No
5
No
6
Is there an overflow or bypass for inflow volume in excess of the
design volume?
No
7
What is the method for dewatering the SCM for maintenance?
N/A
8
If applicable, will the SCM be cleaned out after construction?
N/A
9
Does the maintenance access comply with General MDC (8)?
Yes
10
Does the drainage easement comply with General MDC (9)?
N/A
11
If the SCM is on a single family lot, does (will?) the plat comply with
General MDC (10)?
N/A
12
Is there an O&M Agreement that complies with General MDC (11)?
Yes
13
Is there an O&M Plan that complies with General MDC (12)?
Yes
141
Does the SCM follow the device specific MDC?
Yes
15
Was the SCM designed by an NC licensedprofessional?
Yes
16
Maximum roof area that will be conveyed to the VRA (so
6055 sf
17
Will the VRA be rectangular in shape?
Yes
18
Length of the rectangle in the direction of flow (feet)
500 ft
19
Width of the rectangle perpendicular to the direction of flow (feet)
8 ft
20
Will the downspouts be equipped with splash pads?
No
21
Length of pavement draining to the VRA (feet)
160 ft
22
Width of the VRA (feet)
134 ft
23
Is the VRA free of BUA except for utility boxes, signs, and lamp
posts?
Yes
24
Hydrologic Soil Group of VRA
C
25
Slope of the VRA in the direction of flow (%)
Will the first 8" of soil be adjusted if needed to promote plant growth?
6.5%
26
Yes
27
Will the filter strip and side slopes be planted with non -clumping,
deep-rooted sod?
No
28
Is there a plan to protect the VRA from erosion until permanent
round cover has taken root?
INFORMATION
Yes
ADDITIONAL
29
Please use this space to provide any additional information about
the disconnected impervious surface(s):
Solar farm construction was completed in 2015 and all project disturbed
areas are vegetated. CCR performs grass mowing as needed, along with
debris removal as part of regular O&M activities (quarterly, min.). Hydrologic
soil goup is actually combined C/D per USDA Soil Survey provided.
2