SW3240304_Supplement-EZ Form_20240703

SUPPLEMENT-EZ COVER PAGE
FORMS LOADED
PROJECT INFORMATION
1 Project Name Waffle House-Lowesville
2 Project Area(ac) 1.01
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 provided(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)(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 1
13 Wet Pond 0
14 Stormwater Wetland 0
15 Permeable Pavement 0
16 Sand Filter 0
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: Ron T.Crump,Principal
28 Organization: Contineo Group
29 Street address: 755 Commerce Drive
30 City,State,Zip: Decatur,GA 30030
31 Phone number(s): 770.335.9403
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 Is this a high density project? Yes
3 drainage areas,
2 If so,number of drainage areas/SCMs 1 SCM
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
CLICK TO LOAD FORM
DRAINAGE AREA INFORMATION Entire Site 1 2 3
4 Type of SCM Bioretention
5 Total drainage area(sq ft) 43995.6 28749.6 3920.4 11325.6
6 Onsite drainage area(sq ft) 43995.6 28749.6 3920.4 11325.6
7 Offsite drainage area(sq ft) 0 0 0 0
8 Total BUA in project(sq ft) 19167 sf 14375 sf 4792 sf
New BUA on subdivided lots(subject to
9 permitting)(sq ft) 16118 sf 14375 sf 1743 sf
New BUA not on subdivided lots(subject to
10 permitting)(sf)
11 Offsite BUA(sq ft)
12 Breakdown of new BUA not on subdivided lots:
-Parking(sq ft)
-Sidewalk(sq ft)
-Roof(sq ft)
-Roadway(sq ft)
-Future(sq ft)
-Other,please specify in the comment box
below(sq ft)
New infiltrating permeable pavement on
13 subdivided lots(sq ft)
New infiltrating permeable pavement not on
14 subdivided lots(sq ft)
Existing BUA that will remain(not subject to
15 permitting)(sq ft)
16 Existing BUA that is already permitted(sq ft) 3049 sf
17 Existing BUA that will be removed(sq ft)
18 Percent BUA 44% 50% 0% 42%
19 Design storm(inches) 1.0 in 1.0 in 1.0 in 1.0 in
20 Design volume of SCM(cu ft) 1456 cf 1088 cf cf 336 cf
21 ,Calculation method for design volume Simple Method Simple Method Simple Method Simple Method
ADDITIONAL INFORMATION
Please use this space to provide any additional information about the
22 drainage area(s):

BIORETENTION CELL
1 Drainage area number 1
2 Minimum required treatment volume(cu ft) 1088 cf
GENERAL MDC FROM 02H.1050
3 Is the SCM sized to treat the SW from all surfaces at build-out? No
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
Are the inlets,outlets,and receiving stream protected from erosion 7
(10-year storm)? Yes _
8 Is there an overflow or bypass for inflow volume in excess of the
design volume? No
9 What is the method for dewatering the SCM for maintenance? Pump(preferred)
10 If applicable,will the SCM be cleaned out after construction? 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 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? No
17 Was the SCM designed by an NC licensed professional? Yes
BIORETENTION CELL MDC FROM 02H.1052
18 SHWT elevation(fmsl) 757.00
19 Bottom of the bioretention cell(fmsl) 761.50 _
20 Ponding depth of the design storm(inches) 12 in _
21 Surface area of the bioretention cell(square feet) 976 sf
22 Design volume of SCM(cu ft) 1281 cf
23 Is the bioretention cell used for peak attenuation? Yes
24 Depth of peak attenuation over planting surface(in) 22 in
25 Height of peak attenuation outlet above the planting surface(in) 18 in
26 Infiltration rate of the in situ soil(inch/hour) .1 in/hr
27 Diameter of the underdrain pipes(if applicable) 4in
28 Does the design include Internal Water Storage(IWS)? No
29 if so,elevation of the top of the IWS(fmsl) N/A
30 Elevation of the planting surface(fmsl) 765 _
31 What type of vegetation will be planted? (grass,trees/shrubs,
other)? Grass
32 Media depth(inches) 54 in _
33 Percentage of medium to coarse washed sand by volume 85% _
34 Percentage of fines(silt and clay)by volume 10% _
35 Percentage of organic matter by volume 5%
36 Type of organic material Pine bark fines
30 in NSW and not
37 to exceed 50
Phosphorus Index(P-Index)of media(unitless) elsewhere
38 Will compaction be avoided during construction? Yes
39 Will cell be maintained to a one inch/hour standard? Yes
40 Depth of mulch,if applicable(inches) N/A
41 Type of mulch,if applicable N/A
42 How many clean out pipes are being installed? 1
43 Type of pretreatment that will be used: Riprap
ADDITIONAL INFORMATION
44 Please use this space to provide any additional information about
the bioretention cell(s):
Bioretention 1 3:39 PM 7/1/2024