SW6211204_Supplement-EZ Form_20220216

CIIPPI PMFNT F7 I^ItiVFR PA(.F
Docu i ign Envelope ID: 517561 F2-345F-4F5B-B805-1 BB03F830A1 F
,-PROJECT INFORMATION
j 1 Project Name
2 Project Area (ac)
3 Coastal Wetland Area ac
I 4 Surface Water Area ac
5 Is this project High or Low Density?
6 Does this project use an off -site SCM?
COMPLIANCE WITH 02H .1003(4)
7 Width of vegetated setbacks provided (feet)
8 Will the vegetated setback remain vegetated?
9 If BUA is proposed in the setback, does it meet NCAC 02H.10n(4)4c-d),
10 Is streambank stabilization proposed on this project?
Lane Farms
20.9
----0 ---
-Low
No
n/a--
n/a
N/A
No
NUMBER AND TYPE OF SCMs:
11 Infiltration System
----- ----- --- - - - - ------
- --
0 -- ..
12 'Bioretention
--------------
Cell
-
0-
13
JWet Pond ------- ---------------------._.._..
.... - --- - ..._ _. .__
..-_.. _ -_. - _ --- - - --------------------------
14
--__--------------------
Stormvmater Wetland
—
0 -T
15
Permeable Pavement -- -- ----- -
------ ----------- -
0
- - ---- --- - __� _------ --- -- -_..
16
- - ....... _ -----------------------------
Sand Fitter _ _ _
-_
0
17
_._.
,Rainwater Harvestinj_ (RWH)
18 Green Roof
0
19 _p-
20
el Spreader -Filter Stri (LS-FS
-- �- ._.��.
connected Impervious Surface DIS)
V
---- - -
0
— -- ----- - -- - -_ --
0
21
atment Swale ----
_ -
0
22 Dry Pond ..... ...
-
0
23
_
'StormFilter
24
Silva Cell
0
25
Ba lter
0
26
Flterra
0
FORMS LOADED
DESIGNER CERTIFICATION
27
Name and Title
Fleet Temple PE _
---
28
}} -
(Organization:
_Enoch Engineers PA
29 Street address:
140.3 NC 50 S
30
31
32
'C ,State, Zip:
Phone number(s):
Email:
Benson, NC 27504
—
919-894-7765
[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.
CA
— ''• 2 SEAL o�
;Q r• _
024441
DocuSigned by:
Sign lure of Designer
B2F63A58E355433...
Date
2/15/2022

DmAIKIAI--C AMOAC
DocuSign Envelope ID: 517561 F2-345F-4F5B-B805-1 BB03F830A1 F
1
Is this a high density project?
No
2
If so, number of drainage areas/SCMs
0
3
Does this ro'ect 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
DRAINAGE AREA INFORMATION
Entire Site
LD 1
4
Type of SCM
5
Total drainage area (sq ft
912320
912320
6
Onsite drainage area (sq ft
912320
912320
7
Offsite drainage area (sq ft
0
0
8
Total BUA in project (sq ft
109469 sf
109469 sf
9permitting)
New BUA on subdivided lots (subject to
s ft
79920 sf
79920 sf
10permitting)
New BUA not on subdivided lots (subject to
sf
29549 sf
29549 sf
11
Offsite BUA (sq ft
sf
12
1 Breakdown of new BUA not on subdivided lots:
Parking (sq ft
Sidewalk (sq ft
Roof (sq ft
Roadway s ft
29549 sf
29549 sf
Future (sq ft
Other, please specify in the comment box
below (sq ft
13
New infiltrating permeable pavement on
subdivided lots (sq ft
14
New infiltrating permeable pavement not on
subdivided lots (sq ft
sf
15permitting)
Existing BUA that will remain (not subject to
s ft
16
1 Existina BUA that is already permitted (sq ft
17
Existing BUA that will be removed (sq ft
18
Percent BUA
12%
12%
19
Design storm inches
1.0 in
1.0 in
20
Design volume of SCM cu ft
21 Calculation method for design volume
ADDITIONAL INFORMATION
Please use this space to provide any additional information about the
22 drainage area(s):

DocuSign Envelope ID: 517561 F2-345F-4F5B-B805-1 BB03F830A1 F
LOW DENSITY
DESIGN
REQUIREMENTS FOR LOW DENSITY PROJECTS FROM 021-1.1003
1
Is project below density thresholds set forth in the applicable stormwater rule?
Yes
2
Does project maximize dispersed flow and minimize channelization of flow?
Yes
3
Has the use of piping been minimized per .1003(2)(c)?
Yes
4
Side slopes of the vegetated conveyances (H:V)
sf
5
Maximum velocity in the vegetated conveyances during the 10-year storm?
4.3
6
Are curb outlet swales proposed?
Yes
7
Maximum longitudinal slope of curb outlet swale(s) (%)
5
8
Bottom width of curb outlet swale(s) (feet)
4 ft
9
Maximum side slope of curb outlet swale(s) (H:V)
3:1
10
Minimum length of curb outlet swale(s) (feet)
100 ft
11
Are treatment swales used instead of curb outlet swales?
No
12
Ps stormwater released at the edge of the setback as dispersed flow?
Yes
13
Have stormwater outlets been designed to prevent downslope erosion?
Yes
14
1 Are variations to rule .1003 proposed?
No
ADDITIONAL INFORMATION
15 iPlease use this space to provide any additional information about this low density project:
Project is in HQW Zone - Limited to 12 % maximum impervious
Swale
#
Drainage
Area
BUA
(ac)
Pervious
area
C
Q
(cfs)
Slope
N
Va„-
(fPS)
V.1-1
(fPS)
Flow depth
(n)
1
0.40
0.05
0.35
0.50
1.60
1.54
5.00
2.40
0.52
2
0.10
0.01
0.09
0.50
0.50
1.54
5.00
1.70
0.34
3
1.30
0.16
1.14
0.50
5.40
3.43
5.00
4.30
0.71
4
1 0.20
0.02
0.18
0.50
0.90
3.43
5.00
2.60
0.37
5
0.30
0.04
0.26
0.50
1.30
1.20
5.00
2.00
0.51
6
0.10
0.01
0.09
0.50
0.50
1.20
5.00
1.50
0.36
7
0.10
0.01
0.09
0.50
0.50
1.20
5.00
1.50
0.36
8
0.10
0.01
0.09
0.50
0.50
1.20
5.00
1.50
0.36
9
0.10
0.01
0.09
0.50
0.50
1.33
5.00
1.60
1 0.35
10
0.10
0.01
0.09
0.50
0.50
1.33
5.00
1.60
0.35
11
0.30
0.04
0.26
0.50
1.30
6.98
5.00
3.80
0.37
12
0.30
0.04
0.26
0.50
1.30
6.98
5.00
3.80
0.37
13
1.90
0.23
1.67
0.50
8.00
2.70
5.00
3.30
0.30
14
0.40
0.05
0.35
0.50
1.70
1.10
5.00
1.50
0.20
15
0.60
0.07
0.53
0.50
2.50
5.00
5.00
3.10
0.20
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30