SW3221003_Supplement-EZ Form_202304020

SUPPLEMENT-EZ COVER PAGE
PROJECT INFORMATION
1 Project Name Rockwell ABC
_2 .Project L--e,{acj 1.52
3 Coastal Wetland Area(ao) _ 0
4 Surface Water Area tin 0
5 Is this poject Hi h'or Low Density?
6 Does this pro)eet 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? N/A
9 If BUA is proposed in the setback,does it meet NCAC 02H.1 003(4)(c-d)? N/A
1 o [is streambank stabilization proposed on this project? No
NUMBER AND TYPE OF SCM9: — --
11 Infiltration
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 lm ervious Surface DIS
21 Treatment Swale
22 Dry Pond
23 Storm Filter
24 Silva Cell
25 Bayfilter
26 Filterra
FORMS L._QAD.ED
RTIFICATION - - - i-
27 Name and Title: Zsch Gardner PE-Civil Engineer
28 Organization:
I Summey Engineering Associates.PLLC
29 Street address: 150 S.Feyetteville St
30 City.State,Zip: j Asheboro,NC 27203
31 Phone number(s):_ 336-328-0902
32 Email: zach®summeyengineering.com
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 forth is,to the beat of my knowledge and belief,We,accurate,and complete;and that the engineering plans,specifications,
operation and maintenance agreements and other supporting Information are consistent with the Information provided here.
Ousfcrrer
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DRAINAGE AREAS
1 Is lhls a high density pralect7 Yes
2 _.oeIf so,.number of drainage areas?SCNls 1
3 Ds this prrn gr!_have low density areas?. _ Na
4 _ If so,number of low density drainage areas U
Is all/part of this project subject to previous rule
5 versions? Yes
FORMS LOADED
DRAiNADE AREA INFORMATION Entire 51ts 1
4 Type of SCM N/A _ _ Sand Filter__
5 Total BUA from project;sq ft) 42633 sf 42833 sf _
6 1995 rules
SL 200&246
2008 rules
2017 rules
New BUA on subdivided lots(subject to
7permitting)(sq ft
1995 rules
SL 2006-246
2008 rules
2017 rules
New BUA not on subdivided lots(subject to
8 permitting)(sf) 42633 of 42833 sf
1995 rules
SL 2006-246 j
2008 rules
2617 rules I
9 Offsits-total area(sq fd) sf sf
1895 rules
SL 2006-246
2008 rules
2017 rules
10 OffsM BUA(sq ft) sf sf
1995 rules
SL 2006-246
2008 rules
2017 rules
11 Design storm(nches) 1 In 1 In
1995 rules
sL 2oos240
2008 rules
2017 rules
12 Breakdown of new BUA:
Parking Jsq ft). 33714 of 33714 of
Sidewalk(sq ft 2903 sf f 2903 sf
Roof(sq ft 8016 sf 6016 sf
Roadway(sq ft)
Future(sq ft
Other,please specify in the comment box below f
fsq ft I
New infiltrating permeable pavement on subdivided
13 lots(sq ft)
New infiltrating permeable pavement not on
14 subdivided lots Jsq
Existing BUA that will remain(not subject to
15 permittin )(sq ft
16 Existing BUA that is alread ermitted fsq ft sf of
17 Existinq BUA that will be removed(sq ft) sf sf
18 Percent BUA 64% 89%
19 Design volume of SCM(cu f li 2551 cf
20 Calculation method for design volume SIMPLE METHOD
ADbMbNAL INFORMATION
21 1 Please use this space to provide any additional
information about the drainage area(s):

SAND FILTER
i Qrafnage area number_ 1
2I Minimum rye Wred treatment volume[Gu$) 2s5i sf
GENERAL MDC
3 Is the SCM si2.1s_d to treat the SW from all surfaces at build-out? Yes
4 Is the SCM located gway:from contaminated soils? Yes
What are the side slopes of the SCM(H:V)? n/a
6 Does the SCM have retaining walls,gabion walls or other engineered Yes
side 51opas1
Are the inlets,outlets,and receiving stream protected from erosion
7 (10-year storm? } Yes
8 Is there an overflow or bypass for inflow volume in excess of the Yes
design volume? _ _
91 What is the method for dewatering the SCM for maintenance? Pump_(P_referredL
10 If applicable,will the SCM be cleaned out after construction? Yes
11 Does the maintenance access comply with General MDC(8)? Yes
12 Does the idralndpe easement comply wlth_General MW{9}$ Yss
13 If the SCM is on a single family lot,does(will?)the plat comply with 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 J12? Yes
16 Does the SCM follow the devicespecific MDC? Yes
17'Was the SCM designed by an NC licensed rofessional? Yes
- ?N 1056 . _ .
18,SHWT elevafion(fmsl)^ 45
19'T. e of sand filter(open or closed) Closed
20 Ir closed,will the filter will be re-cast or pour-in-place? Cast In Piece
211 If closed,top of rate elevation(fmsl) 761.5
22 Is this sand filter designed to attenuate peak flows? Nip
SeditN tE
23 Vulufne that can be retained in the sediment chamber(cubic feet) 1350 cf
24'Will there be a permanent pool in the sediment chamber? I. Yes
25 Bottom of the sediment chamber fmsl 752.17
26,Area of the sediment chamber(square fee 300 of
271 Physical depth of the sediment chamber inches 761n
28 depth in the sediment chamber,above any permanent pool 54 In
�Ponding
Elevation of top of weir between chambers fmsl 754
Sand Chamber
30 1 Volume that can be retained In the sand chamber(Cubic feat) 1350 cf
31 Bottom of the sand chamber(fmsl) F 754.00
32 Area:of the sand chamber(square W 300 of
33 Physical depth of the sand chamber(inches) 76 In
34 Ponding depth in the sand chamber,above the sand surface(inches) 58 In
35 Elevation of the bypass device(fmsl) 758.5
36 Type of bvoass device Orifice Pipe
37 Mechanism for distributing flow over the sand surface Multiple Small
Orifces
38 Sand specification for sand chamber ASTM C-33
39 Depth above underdrain pipe inches 12 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 i es be ca ed? Yes
ADDITIONAL INFORMATION
43 Please use this space to provide any additional information about the
sand filter(s):
Sand Filter 3 3:09 PM 4/20/2023