SW3221001_Supplement-EZ Form_20230216

SUPPLEMENT-EZ COVER PAGE
FORMS LOADED
OJECT INFORMATION
1 Project Name
2 Project Area (ac)
3 Coastal Wetland Area ac
4 Surface Water Area (ac)
5 Is this project High or Low Density?
6 Does this project use an off -site SCM?
Brighton Park
85.71
1.065
High
No
COMPLIANCE WITH 02H .1003(4)
7
Width of vegetated setbacks provided feet
85
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 this project?
No
MBER AND TYPE
11
Infiltration System
12
Bioretention Cell
13
Wet Pond
14
Stormwater Wetland
15
Permeable Pavement
16
Sand Filter
6
17
Rainwater Harvesting RWH
18
JGreen Roof
19
Level S reader -Filter Strip LS-FS
20
Disconnected Impervious Surface DIS
21
Treatment Swale
22
Dry Pond
23
StormFilter
24
Silva Cell
25
Ba filter
Filterra
26
FORMS LOADED
SIGNER CERTIFICATION
27 Name and Title:
29
IStreet address:
30
City, State, Zip:
31
Phone number(
32
Email:
I Carlos L. Ruano, P.E.
16507-A Nonccross Drive
Huntersville, NC 28078
704-895-8484
[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.
EsSl i
SEAL =
52356
0- AtIN., JP�O
OS
Signature of Designer
Date
2/9/2023

DRAINAGE AREAS
1
Is this a high density project?
Yes
2
If so, number of drainage areas/SCMs
6
3
Does this project have low density areas?
No
4
If so, number of low density drainage areas
0
5
Is all/part of this project subject to previous rule
versions?
No
FORMS LOADED
DRAINAGE AREA INFORMATION
Entire Site
1
2
3
4
4
Type of SCM
Sand Filter
Sand Filter
Sand Filter
Sand Filter
Sand Filter
5
Total drainage area (sq ft
2831400
794099
449975
386377
416434
6
Onsite drainage area (sq ft
2831400
794099
449975
386377
416434
7
Offsite drainage area (sq ft)
101766
0
0
0
0
8
Total BUA in project (sq ft)
1267671
387208 sf
192839 sf
171602 sf
188492 sf
9
New BUA on subdivided lots (subject to permitting)
(sq ft
836600
225600 sf
138650 sf
117500 sf
54102 sf
129250 sf
59242 sf
10permitting)
New BUA not on subdivided lots (subject to
s
431071
161608 sf
54189 sf
11
Offsite BUA (sq ft
21873
0
sf
12
Breakdown of new BUA not on subdivided lots:
Parkin (sq ft
11530
11530 sf
Sidewalk (sq ft
98707
32234 sf
14549 sf
12720 sf
13068 sf
Roof (sq ft)
21780
21780 sf
Roadway s ft
299054
96063 sf
39640 sf
41382 sf
46174 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
Isubdivided lots (sq ft
15permitting)
Existing BUA that will remain (not subject to
s ft
16
Existing BUA that is already permitted (sq ft
17
Existing BUA that will be removed (sq ft)
18
Percent BUA
45%
49%
43%
44%
45%
19
Design storm (inches)
1.0 in
1.0 in
1.0 in
1.0 in
1.0 in
20
Design volume of SCM cu ft
32349 cf
16338 cf
14480 cf
15872 cf
21
lCalculation method for design volume
Simple Method
Simple Method
Simple Method
Simple Method
Simple Method
ADDITIONAL INFORMATION
22
Please use this space to provide any additional information about the
drainage area(s):

DRAINAGE AREAS
1
Is this a high density project?
Yes
2
If so, number of drainage areas/SCMs
6
3
Does this project have low density areas?
No
4
If so, number of low density drainage areas
0
5
Is all/part of this project subject to previous rule
versions?
No
FORMS LOADED
DRAINAGE AREA INFORMATION
Entire Site
5
6
4
Type of SCM
Sand Filter
Sand Filter
Sand Filter
5
Total drainage area (sq ft
2831400
351529
432986
6
Onsite drainage area (sq ft
2831400
351529
432986
7
Offsite drainage area (sq ft)
101766
0
0
8
Total BUA in project (sq ft)
1267671
136941 sf
190589 sf
9
New BUA on subdivided lots (subject to permitting)
(sq ft
836600
103400 sf
122200 sf
10permitting)
New BUA not on subdivided lots (subject to
s
431071
21873
0
33541 sf
68389 sf
11
Offsite BUA (sq ft
12
Breakdown of new BUA not on subdivided lots:
Parkin (sq ft
11530
Sidewalk (sq ft
98707
8712 sf
17424 sf
Roof (sq ft)
21780
Roadway s ft
299054
24830 sf
50965 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
Isubdivided lots (sq ft
15permitting)
Existing BUA that will remain (not subject to
s ft
16
Existing BUA that is already permitted (sq ft
17
Existing BUA that will be removed (sq ft)
18
Percent BUA
45%
39%
44%
19
Design storm (inches)
1.0 in
1.0 in
1.0 in
20
Design volume of SCM cu ft
11735 cf
16098 cf
21
Calculation method for design volume
Simple Method
Simple Method
Simple Method
ADDITIONAL INFORMATION
22
Please use this space to provide any additional information about the
drainage area(s):

SAND FILTER
11
Drainage area number
1
2
3
4
5
2
1 Minimum required treatment volume cu ft
24262 sf
11371 sf
11125 sf
11772 sf
8800 sf
GENERAL MDC FROM 02H .1050
3
Is the SCM sized to treat the SW from all surfaces at build -out?
Yes
Y-es
Yes
Yes
Yes
4
Is the SCM located away from contaminated soils?
Yes
Yes
Yes
Yes
Yes
5
What are the side slopes of the SCM (H:V)?
3:1
3:1
3:1
3:1
3:1
6
Does the SCM have retaining walls, gabion walls or other engineered
side slopes?
No
No
No
No
No
7
Are the inlets, outlets, and receiving stream protected from erosion
(10-year storm)?
Yes
Yes
Yes
Yes
Yes
8
Is there an overflow or bypass for inflow volume in excess of the
design volume?
Yes
Yes
Yes
Yes
Yes
9
What is the method for dewatering the SCM for maintenance?
Drawdown Orifice
Drawdown Orifice
Drawdown Orifice
Drawdown Orifice
Drawdown Orifice
10
If applicable, will the SCM be cleaned out after construction?
Yes
Yes
Yes
Yes
Yes
11
Does the maintenance access comply with General MDC (8)?
Yes
Yes
Yes
Yes
Yes
12
Does the drainage easement comply with General MDC (9)?
Yes
Yes
Yes
Yes
Yes
13
If the SCM is on a single family lot, does (will?) the plat comply with
General MDC (10)?
Yes
Yes
Yes
Yes
Yes
14
Is there an O&M Agreement that complies with General MDC (11)?
Yes
Yes
Yes
Yes
Yes
151
Is there an O&M Plan that complies with General MDC (12)?
1 Yes
Yes
Yes
Yes
Yes
161
Does the SCM follow the device specific MDC?
Yes
Yes
Yes
Yes
Yes
17
Was the SCM desi ned bv an NC licensedprofessional?
Yes
Yes
Yes
Yes
Yes
SAND FILTER
MDC FROM 02H .1056
18
SHWT elevation (fmsl)
606.79
627.61
623
623.71
607.23
19
Type of sand filter (open or closed)
Open
Open
Open
Open
Open
20
If closed, will the filter will be pre -cast or pour -in -place?
N/A
N/A
N/A
N/A
N/A
21
If closed, top of grate elevation (fmsl)
N/A
N/A
N/A
N/A
N/A
22
Is this sand filter designed to attenuate peak flows?
Yes
Yes
Yes
Yes
Yes
I Sediment Chamber
23
Volume that can be retained in the sediment chamber (cubic feet)
18057 cf
22174 cf
12353 cf
no
628.00
14774 cf
no
631.00
10483 cf
no
613.00
24
Will there be a permanent pool in the sediment chamber?
no
611.00
no
633.00
25
Bottom of the sediment chamber (fmsl)
26
Area of the sediment chamber (square feet
7003 sf
9538 sf
4953 sf
5977 sf
3837 sf
27
Physical depth of the sediment chamber (inches)
24 in
24 in
24 in
24 in
24 in
24 in
24 in
24 in
24 in
24 in
28
Ponding depth in the sediment chamber, above any permanent pool
inches
Elevation of top of weir between chambers (fmsl)
29
613
635
630
633
615
Sand Chamber
30
Volume that can be retained in the sand chamber (cubic feet)
13489 cf
11237 cf
7701 cf
7468 cf
6724 cf
31
Bottom of the sand chamber (fmsl)
611.00
632.50
628.00
631.00
613.00
32
Area of the sand chamber (square feet)
2640 sf
4705 sf
1360 sf
2955 sf
2529 sf
33
Physical de th of the sand chamber inches
24 in
24 in
24 in
24 in
24 in
34
Ponding depth in the sand chamber, above the sand surface
(inches)
24 in
18 in
24 in
24 in
24 in
351
Elevation of the bypass device (fmsl)
612
634
630
633
615
36
Type of bypass device
Orifice
Orifice
Orifice
Orifice
Orifice
37
Mechanism for distributing flow over the sand surface
Riprap
Riprap
Riprap
Riprap
Riprap
38
Sand specification for sand chamber
ASTM C33
ASTM C33
ASTM C33
ASTM C33
ASTM C33
39
Depth above underdrain pipe (inches)
12 in
18 in
18 in
18 in
18 in
40
Will the media be maintained to drain at least two inches per hour at
the sand surface?
Yes
Yes
Yes
Yes
Yes
41
Is at least one clean -out pipe provided at the low point of each
underdrain line?
Yes
Yes
Yes
Yes
Yes
42
Will clean -out pipes be capped?
I Yes
I Yes
I Yes
Yes
Yes
Sand Filter 4 12:33 PM 2/8/2023

SAND FILTER
1
Drainage area number
6
2
Minimum required treatment volume cu ft
12603 sf
GENERAL MDC FROM 02H .1050
3
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
5
What are the side slopes of the SCM (H:V)?
3:1
6
Does the SCM have retaining walls, gabion walls or other engineered
side slopes?
No
7
Are the inlets, outlets, and receiving stream protected from erosion
(10-year storm)?
Yes
8
Is there an overflow or bypass for inflow volume in excess of the
design volume?
Yes
9
What is the method for dewatering the SCM for maintenance?
Drawdown Orifice
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)?
Yes
14
Is there an O&M Agreement that complies with General MDC (11)?
Yes
151
Is there an O&M Plan that complies with General MDC (12)?
1 Yes
161
Does the SCM follow the device specific MDC?
Yes
17
Was the SCM desi ned bv an NC licensedprofessional?
Yes
SAND FILTER
MDC FROM 02H .1056
18
SHWT elevation (fmsl)
606
19
Type of sand filter (open or closed)
Open
20
If closed, will the filter will be pre -cast or pour -in -place?
N/A
21
If closed, top of grate elevation (fmsl)
N/A
22
Is this sand filter designed to attenuate peak flows?
Yes
23
Volume that can be retained in the sediment chamber (cubic feet)
18232 cf
24
Will there be a permanent pool in the sediment chamber?
no
618.00
25
Bottom of the sediment chamber (fmsl)
26
Area of the sediment chamber (square feet
7607 sf
24 in
24 in
27
Physical depth of the sediment chamber (inches)
28
Ponding depth in the sediment chamber, above any permanent pool
inches
Elevation of top of weir between chambers (fmsl)
29
620
Snnr/ rh—h-
30
Volume that can be retained in the sand chamber (cubic feet)
9593 cf
31
Bottom of the sand chamber (fmsl)
618.00
32
Area of the sand chamber (square feet)
3733 sf
33
Physical de th of the sand chamber inches
24 in
34
Ponding depth in the sand chamber, above the sand surface
(inches)
24 in
351
Elevation of the bypass device (fmsl)
620
36
Type of bypass device
Orifice
37
Mechanism for distributing flow over the sand surface
Riprap
38
Sand specification for sand chamber
ASTM C33
39
Depth above underdrain pipe (inches)
18 in
40
Will the media be maintained to drain at least two inches per hour at
the sand surface?
Yes
41
Is at least one clean -out pipe provided at the low point of each
underdrain line?
Yes
42
Will clean -out pipes be capped?
I Yes
Sand Filter 5 12:33 PM 2/8/2023