SW6231203_Supplement-EZ Form_20240312

SUPPLEMENT-EZ COVER PAGE
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PROJECT INFORMATION
1 Project Name Gillespie-B1.9 Solar Utility Station
2 Project Area(ac) 41.74
3 Coastal Wetland Area(ac) 0
4 Surface Water Area(ac) 2.01
5 Is this project Hi h or Low Densit? Low
6 i Does this project use an off-site SCM? No
COMPLIANCE WITH 02H.1003(4)
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)? WA
10 Is streambank stabilization proposed on this project? No
NUMBER AND TYPE OF SCMs:
11 1 Infiltration System
12 Bioretention Cell
13 Wet Pond
14 Stormwater Wetland
15 Permeable Pavement
16 Sand Filter
17 Rainwater Harvesting(RWH)
18 Green Roof
19 Level Spreader-Filter Strip(LS-FS)
20 IDisconnected Impervious Surface(DIS) 1
21 Treatment Swale
22 Dry Pond
23 StornFilter
24 Silva Cell
25 Bayfilter
26 Filterra
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DESIGNER CERTIFICATION
27 Name and Title: Laura Hams,P.E.,Project En ineer III-Team Lead
28 Organization: Booth&Associates,LLC
29 Street address: 2300 Rexwoods Drive.Suite 300
30 City,State,Zip: Raleigh,NC 27607
31 Phone number(s): 919-851-8770
32 Email'. Laura.Marrt hrwth•as
Certtficauon 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? No
2 If so,number of drainage areas/SCMs 0
3 Does this project have low density areas? Yes
4 If so,number of low density drainage areas 3
Is all/part of this project subject to previous rule
5 versions? No
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DRAINAGE AREA INFORMATION Entire Site
4 Type of SC DIS
5 Total BUA from project(sq ft 132964 sf
6 1995 rules -
SL 2006-246
2008 rules
2017 rules
New BUA on subdivided lots(subject to
7permitting) s ft N/A
1995 rules
SL 2006-246
2008 rules
2017 rules -
New BUA not on subdivided lots(subject to
8permitting) s 124030 sf
1995 rules -
SL 2006-246
2008 rules
2017 rules -
9 Offsite-total area(sq ft 133986 sf
1995 rules -
SL 2006-246
2008 rules
2017 rules
10 Offsite BUA s ft
1995 rules
SL 2006-246
2008 rules
2017 rules
11 Design storm inches 6 in
1995 rules
SL 2006-246
2008 rules
2017 rules -
12 Breakdown of new BUA: 124030 sf
Parking(sq ft) 73403 sf
Sidewalk(sq ft -
Roof(sq ft) -
Roadway(sq ft 33657 sf
Future(sq ft) -
Other,please specify in the comment box
below(sq ft) 16970 sf
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
15permitting) s ft 8934 sf
16 Existing BUA that is already permitted(sq ft -
17 Existing BUA that will be removed(sq ft -
18 Percent BUA 7%
N/A;not a
19 Design volume of SCM cu ft structural BMP
no a
20 Calculation method for design volume structural BMP
ADDITIONAL INFORMATION
Please use this space to provide any additional
21 information about the drainage area(s):
Other BUA=Gravel equipment pad.

DISCONNECTED IMPERVIOUS
SURFACES (DIS)
GENERAL MDC FROM 02H.1050
1 Is the SCM sized to treat the SW from all surfaces at build-out? Yes
2 Is the SCM located away from contaminated soils? Yes
3 What are the side slopes of the SCM(H:V)? 16:1
4
Does the SCM have retaining walls,gabion walls or other
No
engineered side slopes?
5 Are the inlets,outlets,and receiving stream protected from erosion Yes
10- ear storm)?
6 Is there an overflow or bypass for inflow volume in excess of the No
design volume?
7 What is the method for dewatering the SCM for maintenance? None
8 If applicable,will the SCM be cleaned out after construction? N/A
9 Does the maintenance access comply with General MDC(8)? Yes
10 Does the drainage easement comply with General MDC(9)? No
If the SCM is on a single family lot,does(will?)the plat comply with
11 N/A
General MDC(10)?
12 Is there an O&M Agreement that complies with General MDC(11)? No
13 Is there an O&M Plan that complies with General MDC(12)? Yes
141 Does the SCM follow the device specific MDC? Yes
15 Was the SCM designed by an NC licensedprofessional? Yes
DIS MDC FROM 02H.1060
16 Maximum roof area that will be conveyed to the VRA(sf) No roofs to be
conveyed to VRA
17 Will the VRA be rectangular in shape? Yes
18 Length of the rectangle in the direction of flow(feet) 1035 ft
19 Width of the rectangle perpendicular to the direction of flow feet 30 ft
20 Will the downspouts be equipped with splash pads? No
21 Length of pavement draining to the VRA(feet) No pavement
drains to VRA
22 Width of the VRA(feet) 30 ft
23 Is the VRA free of BUA except for utility boxes,signs,and lamp Yes
posts?
24 Hydrologic Soil Group of VRA A
25 Slope of the VRA in the direction of flow % 6%
26 Will the first 8"of soil be adjusted if needed to promote plant growth? Yes
27 Will the filter strip and side slopes be planted with non-clumping, Yes
deep-rooted sod?
28 Is there a plan to protect the VRA from erosion until permanent Yes
round cover has taken root?
ADDITIONAL INFORMATION
29 Please use this space to provide any additional information about the
disconnected impervious surface(s):