SW3240601_Supplement-EZ Form_20240618

SUPPLEMENT-EZ COVER PAGE
FORMS LOADED
PROJECT INFORMATION
1 Pro,ect Name Grace Church Road Industrial
2 Pro,ect Area(ac) 19 97
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
COMPLIANCE WITH 02H.1003(4)
7 Width of vegetated setbacks prov,ded(feet)__ �_ 30'
8 Will the vegetated setback remain vegetated? Yes
9 If BUA is proposed in the setback,does it meet NCAC 02H.1003(4$0)? N/A
10 Is streambank stabilization proposed on this project? No
NUMBER'AND TYPE OF SCMs:
11 Infiltration System 0
12 Bioretention Cel 0
13 Wet Pond 0
14 Stormwater Wetland 0
15 Permeable Pavement 0
16 Sand Filter 2
17 Rainwater Harvesting,(RWH) 0
18 Green Roof 0
19 Level Spreader_Filter Strip(LS-FS) 0
20 Disconnected Impervious Surface(DIS) 0
__21 Treatment Swale _ 0
22 Dry Pond 2
23 StormFitter 0
24 Silva Cell 0
25 Bayfilter 0
26 Filterra 0
FORMS LQADED
DES GNER CERTIFICATION
27 Name and Title Nestor Hernandez, PE
28 Organization Thomas&Hutton
29 Street address 1020 Euclid Ave
30 City,State Zip Charlotte NC 28203
31 Phone number(s) [phone]
32 Email: hernandez.n@tandh corn
Certification Statement.
I certify under penalty of law that tha 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,a_curate and compete and that the engineering plans,
specifications operation and maintenan agreements and other supporting information are consstent with the,nformation provided here
Desioner
%%1t I l l 11 j//
`‘‘‘�1� CAR
2�.c,SSS/O
.a SEAL r_ : Sg ureolDes
053946
•
yv •• GfNe. •'t<,,
411
'///• HEKT4 \\\\ pkz. �.
Seal Date

DRAINAGE AREAS
1 Is this a high density project? _ Yes
2 If so,number of drainage areas/SCMs 2
3 Does this project have low density areas? No
4 If so,number of low density drainage areas
Is all/part of this project subject to previous rule
I 5 versions? No
CLICK TO LOAD FORM

SAND FILTER
1 Drainage area number _ 1 2
2 Minimum required treatment volume tcu fti 44790 sf 1967 sf
GENERAL MDC FROM 02H,10542.
3 Is the SCM_ sized to treat the SW from all surfaces__atee build-out? Y Yes
4 Is the SCM located away from contaminated soils? Yes _ Yes
5 What are the side slam_of the SCM(HHVy? 3 1 _ y 3 1
6 Does the SCM have retaining walls,gablon walls or other engineered No No
side slopes?
Are the Inlets,outlets,and receiving stream protected from erosion
7 (10-year storm)? Yes Yes
8 Is there an overflow or bypass for Inflow volume in excess of the Yes Yes
L design volume?
9 What is the method for dewatering the SCM for maintenance? Pump(preferred) Pump(;preferred)
10 If applicable,will the SCM be cleaned out after construction? Yes Yes
i
_ 11 Does the maintenance access comply with General MDC(8)? Yes Yes
12 Does the drainage easement comply with General MDC(9)? Yes Yes
13 If the SCM is on a single family lot,does(will?)the plat comply with N/A N/A
General MDC(10)?
14 Is there an 08M Agreement that complies with General MDC(11)7 Yes Yes
15 Is there an 08M Plan that complies with General MDC(12)? __ Yes Yes
16 Does the SCM follow the device specific MDC? Yes Yes
17 Was the SCM Asked by an NC licensed professional? Yes _ Yes •
;AND FILTER MDC FROM 0211.1056 •
18 SHWT elevation(fmsi) 718 754
19 Type of sand filter(open or dosed) 1 Open Open
20 If closed,will the filter will be pre-cast or pour-in-place?
21 If closed,top of grate elevation(fmsi)
Y
22 Is this sand filler designed to attenuate peak flows? Yes No
Sediment Chamber
23 Volume that can be retained in the sediment chamber(cubic feet) I 22500 cf 400 cf
24I Will there be a permanent pool in the sediment chamber? _ No No
25 jBottom of the sediment chamber fmsi _ 734 00 756.50
26 Area of the sediment chamber(square feet) _ 90000 sf 200 sf
27 Physical depth of the sediment chamber((nches) 23 in 10,n
Ponding depth in the sediment chamber,above any permanent pool
28 (inches) 30 in 24;n
29 Elevation of top of weir between chambers(fmsi) 740 5 761
Sand Chamber
30 Volume that can be retained:n the sand chamber(cubc feet) 22500 cf J 1600 cf
31 Bottom of the sand chamber(fmsi) 734.00 756.50
_ 32 Area of the sand chamber(square feet)_ 9000 sf 800 sl -
33 Physical depth of the sand chamber(inches) 78 in 54 In
Pending depth in the sand chamber,above the sand surface 30 in 24 In
(inches)
35 Elevation of the bypass device(fmsi) • 740.5 761 •
36 Type of bypass device Emergency Designed
Spilllway _ OvertopF ng
_ 37 Mechanism for distributing flow over the sand surface Natural Flow Natural Flow
38 Sand specification for sand chamber ASTM C33 or ASTM C33 or
equivalent equivalent
39 Depth above underdrain ppe(inches) 18 In 18 in
40 Will the media be maintained to drain at least two nches per hour at Yes Yes •
the sand surface?
41 Is at least one dean-out pipe provided al the low point of each
underdrain line? Yes Yes
42 Will clean-out pipes be capped? Yes ' Yes
rADDITIONAL INFORMATION
43 Please use this space to pro.ide any additional information about the
sand filter(s)

DRY POND
1 Dra nage area number 1 2
I 2 Minimum required treatment volume _u ft) 44790 sf 1967 sf
QENERAL MDC FROM 02H.1050
3 Is the SCM sized to treat the SW from all surfaces at build out? No Ne
4 Is the SCM located away from contaminated soils? Yes _ Yes
- 5 What are the side slopes of the SCM(H:V)? 3 1 3 1 _
Does the SCM have retaining walls, gabion walls or other engineered
r 6 side slopes? No No
7 Are the inlets outlets,and receiving stream protected from erosion Yes Yes
(10-year storm)?
Is there an overflow or bypass for inflow volume in excess of the
8 design volume? Yes Yes H
9 What is the method for dewatering the SCM for maintenance? Drawdown Orifice Drawdown Orifice
10 If a lipp cable,will the SCM be cleaned out after construction? N/A _ N/A _
11 Does the maintenance access comply with General MDC(8)? Yes _ Yes • --'
12 Does the drainage easement comply with General MDC(9)? Yes Yes
131 If the SCM is on a single family lot,does(will?)the plat comp y with
- ,Genera MDC(10)? N/A N/A
14 Is there an O&M Agreement that complies with General MDC(11)? Yes Yes
L- 15 Is there an O&M Plan that complies with General MDC(12)? Yes Yes
16 Does the SCM follow the devide specific MDC? No No
17 Was the SCM d9ned by an NC licensed professional? Yes Yes
pRY POND MIXFROM 02H,S062
18 SHWT elevation(fmsl) � —is.
_ 754 ��
19 Elevation of the bottom of the dry pond(fmsl) 735 5 758
20 Distance from bottom to SHWT(feet) 17 ft 4 ft
21 Elevation of the temporary pool during the design storm(feet) 736 18 ft 758 16 ft_
22 Ponding depth of the des gn storm(feet)_ 68 ft 16 ft
23 Will the dry pond be uniformly graded to flow toward the outlet? No No
24 Is a low flow channel being provided? No _ No
Are the inlet(s)and outlet located in a manner that avoids short-
25 circuiting? Yes Yes
1 26 Will berms or baffles be,provided to increase the flow path? No No
n 27 What method__ of pretreatment will be provided? Forebay Forebay
28 Design volume of SCM(cu ft) 188,171 00 40,276 68 _
29 Diameter of drawdown orifice en) 6 in 6 in
30 Drawdown time for the temporary pool(hours) <24 —_ <24 _
31 Does the pond minimize impacts to the receiving channe from the 1- Yes Yes
yr_24-hr storm?
32 Is there a small permanent pool near the orifice to prevent clogging? No No
- 33 WIll the outlet be designed to prevent clogging? Yes Yes_ _
34 Are the dam and embankment planted In non--lumping turf grass? Yes T Yes
35 Species of turf that will be used on the dam and embankment fescua centipede fescuelcentlpede
blend blend
Will trees and shrubs be prevented from growing on the dam and
36 embankment? Yes Yes
ADDITIONAL INFORMATION
r- 37 Please use this space to provide any add clonal informat'on about the
dry ponds)
in this design,the dry pond will be act as a secondary SCM In direct
connection with a sand filter which will be acting as the design's primary
SCM
16)MDC 8,we do not have a small permanent pool for the above reasoning
-_I