SW6241005_Supplement-EZ Form_20241105

SUPPLEMENT-EZ COVER PAGE
FORMS LOADED I
PROJECT INFORMATION
1 Project Name _ _ Compton Addy-Popeyes-Spout Springs,NC _
2 Project Area(ac) 0.96
3 Coastal Wetland Area(ac) 0
4 Surface Water Area(ac) 0.18
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 provided(feet) 10
8 Will the vegetated setback remain vegetated? No
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
NUMBER AND TYPE OF SCMs:
11 Infiltration System l 0
12 Bioretention Cell {I 0
13 Wet Pond I 0
14 Stormwater Wetland 0
15 Permeable Pavement 0 _
16 Sand Filter 1
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 0
23 StormFilter 0 _
24 Silva Cell 0
25 Bayfilter 0
26 Filterra 0
FORMS LOADED
DESIGNER CERTIFICATION
27 Name and Title: i Jeff Tibbitts
28 Organization: _ CESO
29 Street address: 3601 Rigby Road,Suite 300 _
30 City,State,Zip: Miamisburg,OH 45342
31 Phone number(s): [phone]
32 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.
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DRAINAGE AREAS
1 Is this a high density project? I Yes
2 If so,number of drainage areas/SCMs I 1 _
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
DRAINAGE AREA INFORMATION Entire Site 1
4 Type of SCM Sand Filter Sand Filter
5 Total drainage area(sq ft) 49700 49700
6 Onsite drainage area(sq ft) 49700 49700
7 Offsite drainage area(sq ft) 0 0
8 Total BUA in project(sq ft) 30500 sf 30500 sf
New BUA on subdivided lots(subject to permitting)
9 (sq ft) sf sf
New BUA not on subdivided lots(subject to
10 permitting)(sf) 30500 sf 30500 sf
11 Offsite BUA(sq ft) sf sf
12 Breakdown of new BUA not on subdivided lots: 0
-Parking(sq ft) 20760 sf 20760 sf
-Sidewalk(sq ft) sf _ sf
-Roof(sq ft) 1990 sf — 1990 sf
-Roadway(sq ft) sf sf
-Future(sq ft) sf sf
-Other,please specify in the comment box
below(sq ft) _ _ 7750 sf 7750 sf ,
New infiltrating permeable pavement on
13 subdivided lots(sq ft) sf _— sf _
New infiltrating permeable pavement not on
14 subdivided lots(sq ft) sf _ sf _
Existing BUA that will remain(not subject to
15 permitting)(sq ft) _ sf sf
16 Existing BUA that is already permitted(sq ft) sf sf
17 Existing BUA that will be removed(sq ft) sf sf _
18 Percent BUA 61% 61%
19 Design storm(inches) 8.3 in 8.3 in
20 Design volume of SCM(cu ft) 5957 cf _ 5957 cf
21 Calculation method for design volume -SCS SCS
ADDITIONAL INFORMATION
Please use this space to provide any additional information about the
22 drainage area(s):
Sand Filter Impervious Area

SAND FILTER
1 Drainage area number 1
2 Minimum required treatment volume(cu ft) 2065 sf
GENERAL MDC FROM 02H.1050
3 Is the SCM sized to treat the SW from all surfaces at build-out? (s Yes
4 Is the SCM located away from contaminated soils? Yes
5 What are the side slopes of the SCM(H:V)? _
6 Does the SCM have retaining walls,gabion walls or other engineered No
side slopes?
7 Are the inlets,outlets,and receiving stream protected from erosion Yes
(10-year storm)? j
8 Is there an overflow or bypass for inflow volume in excess of the Yes
design volume? i
9 What is the method for dewatering the SCM for maintenance? [ Drawdown Orifice
10 If applicable,will the SCM be cleaned out after construction? I N/A
11 Does 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
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
SAND FILTER MDC FROM 02H.1056
181SHWT elevation((rust) 336
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 dosed,top of grate elevation(fmsl)
22 1 Is this sand filter designed to attenuate peak flows? Yes
Sediment Chamber
23 Volume that can be retained in the sediment chamber(cubic feet) 5615 cf
24 Will there be a permanent pool in the sediment chamber? No
25 Bottom of the sediment chamber(fmsl) I 336.50
26 Area of the sediment chamber(square feet) I 1011 sf
27 Physical depth of the sediment chamber(inches) 36 in
28 Ponding depth in the sediment chamber,above any permanent pool 36 in
inches)
29 Elevation of top of weir between chambers(fmsl) 336.5
Sand Chamber
301Volume that can be retained in the sand chamber(cubic feet) 6172 cf
31 Bottom of the sand chamber(fmsl) 334.00
32 Area of the sand chamber(square feet) 1203 sf
33 Physical depth of the sand chamber(inches) 66 in
Ponding depth in the sand chamber,above the sand surface 36 in
(inches)
35 Elevation of the bypass device(fmsl) 339.5
36 Type of bypass device Spillway
37 Mechanism for distributing flow over the sand surface Underdrain
38 Sand specification for sand chamber ASTM C33
39 Depth above underdrain pipe(inches) 24 in
40 Will the media be maintained to drain at least two inches per hour at Yes
the sand surface?
41 Is at least one clean-out pipe provided at the low point of each Yes
underdrain line?
42 Will clean-out pi es be capped? Yes
ADDITIONAL INFORMATION
43 Please use this space to provide any additional information about the
(sand filter(s): _
Sand Filter 3 11:34 AM 10/10/2024

SUPPLEMENT-EZ COVER PAGE
FORMS LOADED
PROJECT INFORMATION
1 Project Name Compton Addy-Popeyes-Spout Sprin,s,NC
2 Project Area(ac) 0.96
3 Coastal Wetland Area(ac) 0
4 Surface Water Area(ac) 0.18
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 provided(feet) 1 10
8 Will the vegetated setback remain vegetated? No
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
NUMBER AND TYPE OF SCMs:
11 'Infiltration System 0
12 Bioretention Cell 0
13 Wet Pond I 0
14 Stormwater Wetland 0
15 Permeable Pavement 0 _
16 Sand Filter 1
17 Rainwater Harvesting(RWH) 1 0
18 Green Roof 1 0
19 Level Spreader-Filter Strip(LS-FS) 0
20 Disconnected Impervious Surface(DIS) 0
21 Treatment Swale 0
22 Dry Pond 0
23 StormFilter 0
24 Silva Cell 0
25 Bayfilter 0
26 Filterra 0
FORMS LOADED
DESIGNER CERTIFICATION
27 Name and Title: j Jeff Tibbitts
28 Organization: _CESO
29 Street address: _ 3601 Rigby Road,Suite 300
30 City,State.Zip: Miamisburg,OH 45342
31 Phone number(s): _ [phone]
32 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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DRAINAGE AREAS
1 Its this a high density project? I Yes
2 L If so,number of drainage areas/SCMs I 1
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
DRAINAGE AREA INFORMATION Entire Site 1
4 Type of SCM Sand Filter Sand Filter
5 Total drainage area(sq ft) 49700 49700
6 Onsite drainage area(sq ft) 49700 49700
7 Offsite drainage area(sq ft) 0 0
8 Total BUA in project(sq ft) 30500 sf 30500 sf
New BUA on subdivided lots(subject to permitting)
9 (sq ft) sf sf
New BUA not on subdivided lots(subject to
10 permitting)(sf) 30500 sf 30500 sf
11 Offsite BUA(sq ft) sf sf
12 Breakdown of new BUA not on subdivided lots: 0
-Parking(sq ft) 20760 sf 20760 sf
-Sidewalk(sq ft) sf sf
-Roof(sq ft) 1990 sf 1990 sf
-Roadway(sq ft) sf sf
-Future(sq ft) sf sf
-Other,please specify in the comment box
below(sq ft) — 7750 sf 7750 sf
New infiltrating permeable pavement on
13 subdivided lots(sqft) sf sf
New infiltrating permeable pavement not on
14 subdivided lots(sq ft) — sf _ sf
Existing BUA that will remain(not subject to
15 permitting)(sq ft) sf sf
16 Existing BUA that is already permitted(sq ft) sf sf
17 Existing BUA that will be removed(sq ft) sf sf
18 Percent BUA 61% 61%
19 Design storm(inches) 8.3 in 8.3 in
20 Design volume of SCM(cu ft) 5957 cf 5957 cf
21 Calculation method for design volume SCS SCS
rADDITIONAL INFORMATION
Please use this space to provide any additional information about the
22 drainage area(s):
Sand Filter Impervious Area

SAND FILTER
1�Drainage area number J 1
2I Minimum required treatment volume(cu ft) 2065 sf
GENERAL MDC FROM 0214.1050
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)?
6 Does the SCM have retaining walls,gabion walls or other engineered No
side slopes?
7 Are the inlets,outlets,and receiving stream protected from erosion Yes
(10-year storm)? I
8 Is there an overflow or bypass for inflow volume in excess of the Yes
design volume?
9 What is the method for dewatering the SCM for maintenance? Drawdown Orifice
10 If applicable,will the SCM be cleaned out after construction? N/A
11 Does the maintenance access comply with General MDC(8)? 1 Yes
12 Does the drainage easement compy with General MDC(9)? Yes
If the SCM is on a single family lot,does(will?)the plat comply with f
13 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? I Yes
SAND FILTER MDC FROM 02H.1056
18 SHWT elevation(fmsl) 336
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(msq
22 Is this sand filter designed to attenuate peak flows? Yes
Sediment Chamber
23 Volume that can be retained in the sediment chamber(cubic feet) 5615 cf
24 Will there be a permanent pool in the sediment chamber? No
25 Bottom of the sediment chamber(fmsl) 336.50
26 Area of the sediment chamber(square feet) 1011 sf
27 Physical depth of the sediment chamber(inches) 36 in
28 Ponding depth in the sediment chamber,above any permanent pool 36 in
(inches)
29 Elevation of top of weir between chambers(fmsl) 336.5
Sand Chamber
30IVolume that can be retained in the sand chamber(cubic feet) 6172 cf
31 Bottom of the sand chamber(fmsl) I 334.00
32 Area of the sand chamber(square feet) 1203 sf
33'Physical depth of the sand chamber(inches) 66 in
Ponding depth in the sand chamber,above the sand surface 36 in
(inches)
35 Elevation of the bypass device(fmsl) 339.5
36 Type of bypass device I Spillway
37 Mechanism for distributing flow over the sand surface Underdrain
38 Sand specification for sand chamber ASTM C33
39 Depth above underdrain pipe(inches) 24 in _
40 Will the media be maintained to drain at least two inches per hour at Yes
the sand surface?
41 Is at least one clean-out pipe provided at the low point of each Yes
underdrain line?
42,WiII clean-out pipes be capped? Yes
ADDITIONAL INFORMATION
43I Please use this space to provide any additional information about the
I sand filter(s):
Sand Filter 3 11:34 AM 10/10/2024