Revised SuppEZ-2020-Version-2.1.3

SUPPLEMENT-EZ COVER PAGE
FORMS LOADED
1 Project Name
Huber Tech Manufacturing Ex. & Passivation
2 Project Area (ac)20.06
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
7 Width of vegetated setbacks provided (feet)50
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
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)
20 Disconnected Impervious Surface (DIS)
21 Treatment Swale
22 Dry Pond
23 StormFilter
24 Silva Cell
25 Bayfilter
26 Filterra
FORMS LOADED
27 Name and Title:Riyad Baroudi, Project Manageer, PE
28 Organization:Stewart
29 Street address:101 N. Tryon Street
30 City, State, Zip:Charlotte, NC, 28202
31 Phone number(s):704-909-3543
32 Email:[e-mail]
Certification Statement:

Designer
______________________________________________
Signature of Designer
______________________________________________
Date

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.
PROJECT INFORMATION
NUMBER AND TYPE OF SCMs:
DESIGNER CERTIFICATION
COMPLIANCE WITH 02H .1003(4)
Seal
10/24/2022
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 0
5
Is all/part of this project subject to previous rule
versions?No
FORMS LOADED
Entire Site 1 2
4 Type of SCM Sand Filter
5 Total drainage area (sq ft)206474 362855
6 Onsite drainage area (sq ft)206474 362855
7 Offsite drainage area (sq ft)0 0
8 Total BUA in project (sq ft)180774 sf 251341 sf
9
New BUA on subdivided lots (subject to permitting)
(sq ft) sf sf
10
New BUA not on subdivided lots (subject to
permitting) (sf)26572 sf 260477 sf
11 Offsite BUA (sq ft)
12 Breakdown of new BUA not on subdivided lots:
- Parking (sq ft)60971 sf 4408 sf
- Sidewalk (sq ft)2482 sf 827 sf
- Roof (sq ft)68816 sf 124248 sf
- Roadway (sq ft)48505 sf 121858 sf
- Future (sq ft)

- Other, please specify in the comment box
below (sq ft)
13
New infiltrating permeable pavement on subdivided
lots (sq ft) sf sf
14
New infiltrating permeable pavement not on
subdivided lots (sq ft) sf sf
15
Existing BUA that will remain (not subject to
permitting) (sq ft)154202 sf 9136 sf
16 Existing BUA that is already permitted (sq ft)
17 Existing BUA that will be removed (sq ft)
18 Percent BUA 13% 48%
19 Design storm (inches)1.0 in 1.0 in
20 Design volume of SCM (cu ft)15836 cf 15836 cf
21 Calculation method for design volume Schueler's Method Schueler's Method
22
DRAINAGE AREA INFORMATION
ADDITIONAL INFORMATION
Drainage area #1 contains existing impervious area and discharges to the
south west.
Drainage area #2 contains new impervious area and discharges north to the
stream buffer. This run-off is collected into a Sandfilter and treated before it
discharges to the stream.
Please use this space to provide any additional information about the
drainage area(s):

251341 sf
260477 sf
1 Drainage area number 2
2 Minimum required treatment volume (cu ft) 15836 sf
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)?N/A
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
18 SHWT elevation (fmsl)754
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? No
23 Volume that can be retained in the sediment chamber (cubic feet) 16200 cf
24 Will there be a permanent pool in the sediment chamber? No
25 Bottom of the sediment chamber (fmsl)769.00
26 Area of the sediment chamber (square feet)2700 sf
27 Physical depth of the sediment chamber (inches)36 in
28 Ponding depth in the sediment chamber, above any permanent pool
(inches)36 in
29 Elevation of top of weir between chambers (fmsl) 772
30 Volume that can be retained in the sand chamber (cubic feet)20996 cf
31 Bottom of the sand chamber (fmsl)769.00
32 Area of the sand chamber (square feet)2700 sf
33 Physical depth of the sand chamber (inches)36 in
34 Ponding depth in the sand chamber, above the sand surface
(inches)36 in
35 Elevation of the bypass device (fmsl)772
36 Type of bypass device
Outlet Structure (4-
sided weir)
37 Mechanism for distributing flow over the sand surface rip-rap dissipater
38 Sand specification for sand chamber ASTM C-33
39 Depth above underdrain pipe (inches)12" Min.
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? Yes
43 Please use this space to provide any additional information about the
sand filter(s):
SAND FILTER
Sand Chamber
Sediment Chamber
ADDITIONAL INFORMATION
GENERAL MDC FROM 02H .1050
SAND FILTER MDC FROM 02H .1056
Sand Filter 3 11:07 AM 10/31/2022