SW3230608_Supplement-EZ Form_20230925

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FORMS LOADED
:OJECT INFORMATION
1 Project Name Stoneglen Subdivision
2 Project Area(ac) 12.4
3 Coastal Wetland Area(ac) 0
4 Surface Water Area(ac) 0
5 Is this project High or Low Density? High
6 Does this project use an off-site SCM? No
IMPLIANCE WITH 02H.1003(4)
7 Width of vegetated setbacks provided(feet) 0
8 Will the vegetated setback remain vegetated? N/A
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
IMBER AND TYPE OF SCMs:
11 Infiltration System
12 Bioretention Cell
13 Wet Pond
14 Stormwater Wetland
15 Permeable Pavement
16 Sand Filter 1
17 Rainwater Harvesting(RWH)
18 Green Roof
19 Level Spreader-Filter Strip(LS-FS)
>.0 Disconnected Impervious Surface(DIS)
?1 Treatment Swale
?2 Dry Pond
?3 StormFilter
>.4 Silva Cell
?5 Bayfilter
?6 Filterra
FORMS LOADED
SIGNER CERTIFICATION
17 Name and Title: Sean Mayo,PE
?8 Organization: Gavel&Dorn Engineering,PLLC
?9 Street address: 6730 Freedom Drive
)0 City,State,Zip: Charlotte,NC 28214
)1 Phone number(s): 7047245047
)2 Email: [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.
Designer
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1 Is this a high density project? Yes
2 If so, number of drainage areas/SCMs
3 Does this project have low density areas? No
4 If so, number of low density drainage areas 0
Is all/part of this project subject to previous rule
5 versions? No
FORMS LOADED

11 11.0 N 11
1 Drainage area number 1
2 Minimum required treatment volume(cu ft) 11697 sf
NERAL MDC FROM 02H.1050
3 Is the SCM sized to treat the SW from all surfaces at build-out? Ycc
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 No
side slopes?
Are the inlets,outlets,and receiving stream protected from erosion
7 (10-year storm)? Yes
Is there an overflow or bypass for inflow volume in excess of the
8 design volume? Yes
9 What is the method for dewatering the SCM for maintenance? Pump(preferred)
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 N/A
General MDC(10)?
14 Is there an O&M Agreement that complies with General MDC(11)? Yes
15 Is there an O&M Plan that complies with General MDC(12)? Yes
16 Does the SCM follow the device specific MDC? Yes
17 Was the SCM designed by an NC licensed professional? Yes
JD FILTER MDC FROM 02H.1056
18 SHWT elevation(fmsl) 748
19 Type of sand filter(open or closed) Open
20 If closed,will the filter will be pre-cast or pour-in-place?
21 If closed,top of grate elevation(fmsl)
22 Is this sand filter designed to attenuate peak flows? Yes
liment Chamber
23 Volume that can be retained in the sediment chamber(cubic feet) 10970
24 Will there be a permanent pool in the sediment chamber? No
25 Bottom of the sediment chamber(fmsl) Yes
26 Area of the sediment chamber(square feet) 8776 sf
27 Physical depth of the sediment chamber(inches) 15 in
28 Ponding depth in the sediment chamber,above any permanent pool 15 in
(inches)
29 Elevation of top of weir between chambers(fmsl) 769.2
id Chamber
30 Volume that can be retained in the sand chamber(cubic feet) 5915 cf
31 Bottom of the sand chamber(fmsl) 765.80
32 Area of the sand chamber(square feet) 4732 sf
33 Physical depth of the sand chamber(inches) 15 in
34 Ponding depth in the sand chamber,above the sand surface 15 in
(inches)
35 Elevation of the bypass device(fmsl) 768.45
36 Type of bypass device Riser
37 Mechanism for distributing flow over the sand surface STONE WEIRS
38 Sand specification for sand chamber C33
39 Depth above underdrain pipe(inches) 12 in
Will the media be maintained to drain at least two inches per hour at
40 the sand surface? Yes
41 Is at least one clean-out pipe provided at the low point of each Yes
underdrain line?
42 Will clean-out pipes be capped? Yes
IDITIONAL INFORMATION
43 Please use this space to provide any additional information about the
sand filter(s):