HomeMy WebLinkAboutSW4210301_SUPPLEMENTAL_EZ_SIGNED_20210416
SUPPLEMENT-EZ COVER PAGE
FORMS LOADED
PROJECT INFORMATION
Project NameAEV Parking Expansion
1
2Project Area (ac)16.999
3Coastal Wetland Area (ac)N/A
4Surface Water Area (ac)2.005
5Is this project High or Low Density?High
Does this project use an off-site SCM?No
6
COMPLIANCE WITH 02H .1003(4)
7Width of vegetated setbacks provided (feet)30
8Will the vegetated setback remain vegetated?Yes
9If BUA is proposed in the setback, does it meet NCAC 02H.1003(4)(c-d)?N/A
Is streambank stabilization proposed on this project?No
10
NUMBER AND TYPE OF SCMs:
11Infiltration System
12Bioretention Cell
13Wet Pond
14Stormwater Wetland
15Permeable Pavement
16Sand Filter1
17Rainwater Harvesting (RWH)
18Green Roof
19Level Spreader-Filter Strip (LS-FS)
20Disconnected Impervious Surface (DIS)
21Treatment Swale
22Dry Pond
23StormFilter
24Silva Cell
25Bayfilter
Filterra
26
FORMS LOADED
DESIGNER CERTIFICATION
27Name and Title:Max Prestwood III, P.E.
28Organization:BREC, PA.
29Street address:1520 Meadowview Drive
30City, State, Zip:Wilkesboro, NC 28697
31Phone number(s):336-844-4088
Email:max@brec.biz
32
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.
Designer
______________________________________________
Signature of Designer
4/16/2021
Date
Seal
DRAINAGE AREAS
1Is this a high density project?Yes
2 If so, number of drainage areas/SCMs1
3Does this project have low density areas?No
4 If so, number of low density drainage areas0
Is all/part of this project subject to previous rule
5versions?No
CLICK TO LOAD FORM
SAND FILTER
1
Drainage area number1
2
Minimum required treatment volume (cu ft)5686 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
Does the SCM have retaining walls, gabion walls or other engineered
6
No
side slopes?
Are the inlets, outlets, and receiving stream protected from erosion
7
Yes
(10-year storm)?
Is there an overflow or bypass for inflow volume in excess of the
8
Yes
design volume?
9What is the method for dewatering the SCM for maintenance?Pump (preferred)
10
If applicable, will the SCM be cleaned out after construction?Yes
11Does the maintenance access comply with General MDC (8)?Yes
12
Does the drainage easement comply with General MDC (9)?Yes
If the SCM is on a single family lot, does (will?) the plat comply with
13
N/A
General MDC (10)?
14
Is there an O&M Agreement that complies with General MDC (11)?Yes
15Is there an O&M Plan that complies with General MDC (12)?Yes
16
Does the SCM follow the device specific MDC?Yes
17Was the SCM designed by an NC licensed professional?Yes
SAND FILTER MDC FROM 02H .1056
18
SHWT elevation (fmsl)2983.47
19Type of sand filter (open or closed)Open
20
If closed, will the filter will be pre-cast or pour-in-place?
21If closed, top of grate elevation (fmsl)
22
Is this sand filter designed to attenuate peak flows? Yes
{ĻķźƒĻƓƷ /ŷğƒĬĻƩ
232861 cf
Volume that can be retained in the sediment chamber (cubic feet)
24Will there be a permanent pool in the sediment chamber?No
25
Bottom of the sediment chamber (fmsl)2988.00
26961 sf
Area of the sediment chamber (square feet)
27
Physical depth of the sediment chamber (inches)12 in
Ponding depth in the sediment chamber, above any permanent pool
28
N/A
(inches)
29
Elevation of top of weir between chambers (fmsl)2990
{ğƓķ /ŷğƒĬĻƩ
30
Volume that can be retained in the sand chamber (cubic feet)2861 cf
312987.50
Bottom of the sand chamber (fmsl)
32
Area of the sand chamber (square feet)729 sf
3318 in
Physical depth of the sand chamber (inches)
Ponding depth in the sand chamber, above the sand surface
3426 in
(inches)
35Elevation of the bypass device (fmsl)2991.2
36
Type of bypass deviceWeir
37Mechanism for distributing flow over the sand surfaceStone Dissipater
38
Sand specification for sand chamberASTM C33
39Depth above underdrain pipe (inches)
Will the media be maintained to drain at least two inches per hour at
40
Yes
the sand surface?
Is at least one clean-out pipe provided at the low point of each
41
Yes
underdrain line?
42
Will clean-out pipes be capped? Yes
ADDITIONAL INFORMATION
Please use this space to provide any additional information about the
43
sand filter(s):
Sand Filter110:05 AM 4/16/2021