SW4191202_Suppliment Forms O & M_1/2/2020

SUPPLEMENT-EZ COVER PAGE
F�pER
MRLIAHCEWITH'02H .1003 4}
Width of veaetated setbacks provided (fee
8 I Will'the Ven Otated setback remain ve etatea'r
_9 1 Is BUA ather that as fisted in .106*4 c-d} out of the setback?.
10 Is streambank stabilisation proposed on this.project?
F Mit s —LOADED
W
W
SEAL
��itl;!lkldilitk\V
No.
4.fDeslgner
Al/o
Data

SUBJECT pRO4wu
oxssrwo OF ..... __....... --
' osoIGwEonY oxre
CHECKED BY o^Ts
--_-
m-
_-_--___--_-_-_--__---__ '---___-_--_
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Sic
4807 KogwrBlvd..Suite. G Greensbmro,NIC .27407

DRAINAGE AREAS
1
is this a hi h:densit roiect?
Yes
2
If soj number of dralmkie areaslSCMs
1
r3
is aI!lpart of this.. project:subject to previous rule
versions?
No
FORMS LOADED
aRAINAGE:ARF_A.INFORMAT[ON.`;;;;':;:;;`;':`<- ;:;.'::: `:
4 T e of SCM
Entire Site:;;::;:::.:=;>-i
::.-..............:.......................,..,
............. .
Wet Pond
5
Total BUA in project (sq ft
185472 sf
6
New BUA`on subdivided lots .(subject to permitting)
(Sq ft
56192 sf .
7
New BUA outside of subdivided iots.(subjact to
ermittih s
sf
8
Offsite - total area.(sq ft
sf
9
Cffsite BUA (50 ft
sf.
10
Brsakdownof new BUA outside subdivided lots:
- Parking Lsg ft
56192 sf
- Sidewalk (sq ft
sf
- Roof (sq ft
sf
- Roadway s ft
sf
- Future: (sq ft
sf
-.Other,: please specify in the corn merit box
below s ft
sf
11
New infiltrating permeable pavement on
subdivided lots (sq ft
sf
12
New infiltrating permeable pavement outside of
subdivided lots (sq ft
sf
13
Exisitng BUA that will remain {not subject to
erniitting) (sq ft
79279 sf
14
Exist[nq BUA that is already enri qt ! s ft.
sf
15
ExistIng BUA that.will be removed (sq ft
sf
16
Percent BUA
74%
17
1 Desi n storm inches
1 in
18
Design Volume df.SCM cu ft
10925 bf
19
i4t]D]TI<'}NAt:INFORtViATIQ
Calculation Method Tor design volume
,....
20
Please. use this space to:proviide any additional information about the .
drainage areas :
The total site area. Is 32,11 acres. Information provided aboveis based on the
project area of 4A acres. Tote 1 BUA associated with the project area is
135472 at TotaI-existing BUA in . pro] ectllmIts is 72,279 sf. Proposed new
BUA within project limits is 56;192 sf. See attached summary:

WET POND
1
Drainage. area nurnher
1
2 Design volume of SCM (cu ft)
6E r aoM ozH':105ff:::::::::.::..:::.::;.:: : <::'::: ';'::::;c
HEf1RL M D
3 Is the SCM sized to treaithe :SW.fram all surfaces at build out?
Yes
4
1s the SCM located away fro m.00ntaminated:solls?
Yes
5
What are the side. slopes of the SCM (H,.V)?
3A
6
Does the SCM have retaining walls, gabIon walls or other engineered
side slopes?
No
7 1
Are the inlets, outlets, and receiving.stream protected from erosion
(10-year stomn)?
Yes
8
[s there:an overflow or bypass for Inflow volume in excess of the
deslgn volume?
Yes
.9
What Is the.method for dewatering.the SCM for rrWlntenance?
Drawdown Orifice
10
If applicable, wilI.the SCM be cleaned out after construction?
Yes
11
Does the maintenance access comply with General MD (8)?
Yes
12
Does the drainage easament comply with.General MDG(9)?
Yes
13
If.the:SCM 1s on a slrigie family ]pt,:does (will?) the plat comply .with
General mbo (.10)?
Yes
14
1s there an O&M Agreiament•that. comp] ies with Genera[ MDC (11)7
Yes:
15
is there an O&M Plan that complies with General :M00 (12)?
Yes
16
Does the SCM follow the device specific MDC?
Yes.
17 Was the.SCM designed by an NC.Iicon sed.professional?
INET POND MDC FRl]M U2F) .9— ...: .. .. ..: .
18 Method.used
Yes.
SAfDA.
191
Has a stagerstorage table been provided in the ca[culatio.ns?
Yes.
20
Elevation of the excavated main pool depth (bottom of sediment
remove[) (fmsl)
8.07.00.
21
Elevation of the main pool bottom -(top of sediment removal) (fmsl)
808.00
M
Elevation of the -bottom of tha vegetated shelf (fmsl)
811.50
23
Elevation of th.6.permanant pool (fnisl)
812,00
241
Elevation of the top of the vegetated shelf (fmsl)
812,50
25
Elevation ofthe temporary pool (fmsl)
813.75
26
Surface.area of the main permanent pool (square feet)
3808:1.
27
Vol urile.of the main permanerit.pool (cubic feet)
10977 of
28
Average depth of the main pool (feet)
3.35 ft
29
Average depth equation used
Equation 3
30
If using equation 3, main pool perimeter (feet)
236.0 ft
311
If using equation 3; width of submerged.veg.. shelf (feet)
3.0 ft
32
Volume of the forebay. (cubic feet)
2640.cf
33
Is this 1540% of the volume in the maim pool?
Yes
341
Clean -out depth for forebay (inches)
12 in
35
Dasign volume: of SCM (Cu ft)
10925 of
36
1s1he.outlet an.orifice.or a weir?
Orifice
37
If orifice, orifice diameter {inches)
12 in
38
1f weir, welt height. (inches)
39
if weir; walr iength.(inches)
40
Drawdown Uine.for the temporary. pool (days)
3:66.
41
Are the inlet(s) and. outlet located in a manner that avoids short-
circuiting?
Yes
42
Are berms or baffles provided to improve the flow path?
No
43
Depth of forebay at entrance (inches)
24 in
44
Depth of forebay at exit (inches)
60 In
45
Does water flow out of.tha forebay in a non -erosive manner?
Yes
46
Width of the vegetated shelf (feet)
6.ft
47
S[ope of vegetated. shelf (KV)
10t1
48..
Does the orifice drawdown from below the top suiface of the
permanent pool?
Yes
49
Does the. pond m[hirnize impacts:to. the receiving channe[ from the 1-
yr, 24-hretorm?
Yes
HIM�C(9)
Are fountains proposed? (If Y, please provide documentation that.
Is.met.)
No
51
Ise trash tack -or other device. provided to protect the outlet system?
Yes
.62
Are the dam and embankment planted in non-ciurtiping turf grass?
Yes
5.3
Species of turf that will tie used on the. darn and embankment
Tall Fescue
54
Hasa p [antl ng: plan been provided for the.vegetated sheif7
Yes
ADDITIONAL
INFORMATION
55
Please use: this space to provide.a.ny addlticnal information about the
wet.pcnd(s):
Wet Rond 3 12A4 PM 12/18/2019

Project Name:.
Project Location:
Maintenance records shall be kept on the following 13MP(s). T1118 maintenance record snap ae kept in a iog fn a Known set locatic
Any deficientBMP elements noted in the inspection will be cornwted; repaired, or replaced Immediately. These`defic€encles can
affect the Integrity of structures, safety of the public; and the polfutant removal efficiency of the BMP(s).
The BUIP(s) on: this project Include (check all that apply &:cc
Bloretentlon CeH
Quantity:
Dry Detention Basin
Quantity:
Grassed Swale
Quantity:
Green Roof
Quantity:.
Infiltration Basin
Quantity:
Infiltration Trench
Quantity:
Level SpreaderNFS
Quantity:
Permeable Pavement
Quantity:
Proprietary System
Quantity:
Rainwater Harvesting
Quantity:
Sand Filter
Quantity:
Stormwater Watiand
Quantity:
Wet Detention. Basin
Quantity;
Disconnected Impervious Area
Present;
User Defined BMP
Present:
❑&M tables will. be added.
Location($): .
Location(s):
Location(s):
Locat€on(s):
Locatinn(s):
L=tiaritsj:
Location(s):
Location(s):
Location(s):
Location(s):
Locat€on(s):
Location(sl, South
Location(s);
Location(s):
Bm
I acknowledge and agree by my signature below that I am responsible for the performance of the. maintenance procedures listed for
each 13MP above, and attached a.&M tables. I agree to notify NCDENR of -any problems with.the system orprior to any changes to
the system or responsible. party.
Signature:
Responslble.Party;
Title & Organ€xatldn:
Street address;
city, state, Zip:
Phone number(s):
Email:
Tony Coomer
Director of ❑ erations/Matcor Metal Fabrication, Inc.
836 Salem Road
Welcome; NC 27374
905-81447479
[e-mail]
Date: �2-
z OY
rise, a '_T( n e S , a Notary. Publio for the State of krr_ frr� l.� �► c�
County of �j]Czv� r1 s�„r_ do Nearby certify that 'fi n 14 e o e`ilh er
personally appeared before me this day Of Q r__ 01_ . and
acknowledge the due execution of the Operations and Maintenance Agreement
Witness my hand and official seal,
ur
STORM-EZ ... ��
Verslon 1 A
My commission expires � �L lip ty afa
O&M Manual Page 1-of 4

e er>I on a
The wet detention basin system is defined as the wet detention basin, pretreatment Including forebays and the vegetated filter If
one. Is provided.
Important maintenance procedures'..
Immediately after the wet detention basin. is establlshed,.the plants on the vegetated shelf and perimeter of the
basin should be watered twice weekly if needed. unfit the plants become established (commonly six weeks).
No portion of the wet detention pond should be fertilized after the first Initial. fertilization' that Is required to
establish the plants on the vegetated shelf.
_ Stable groundcoVer should be maintained in the drainage area to reduce the sediment load. to the Duet. detention
basin.
If the basin must be drained for an emergency or to perform maintenance, the flushing of sediment:through the
emergency drain should be minimized to the maximum.extent practical.
Once a year, a dam safety:expert should fnspect.the.. embankment:
After the wet detention pond Is eslablished, It should be Inspected once a month and within 24 hours after evorystornn event
greater than 1.0 Inches {or 1.6 inches If Ina Coastal County}. Records of operation and maintenance should bs kept in a.
known set location and must be available upon request.
Inspectlon activities shall be performed as follows: Any problems that are found small be repaired Immediately.
BMP element:
Potential problem:
How I will nemedlate the problem:
The entire BMP
Trasiildebris is present.
Remove the trash/debris,
The perimeter of the BMP
Areas of.bare soil.andfor
erosive guilles have formed,
Regrade the. soil If necessary to remove the gully; and then plant a
ground cover and water until It Is established. Provide lime and a one-
time fertilizer application.
Vegetation is too short or too
Maintain vegetation at a height of approximately six inches.
long.
The inlet device
The pipe Is clogged.
Unclog the pipe. Dispose of the sediment off -site.
The pipe is cracked or
Replace the pipe.
otherwise damaged.
Erosion is occurring in the
Regrade the Swale if necessary:.to smooth It over and provlde erosion
Swale,
control devices such as ralnforeed turf matting orriprap to.avold.future
problems with erasion.
Stone verge Is clogged or
Remove sediment and replace with clean stone.
covered in sediment (If
applicable)_
The forebay
Sediment has accumulated to
a depth greater than the
Search for the source of the sediment and remedy the problem if
possible. Remove the sediment and dispose of it in a Iocatlon where it
original design depth for
will not cause impacts to streams or the BMP.
sediment storage.
Erosion has occurred.
Provide additional erosion protection such as r®inforced.h,rrf matting or
riprap if needed to prevent future erosion problems.
Weeds are present.
Remove the weeds, preferably by hand. If pesticide €s used, wipe it on
the plants rather than spraying.
The vegetated shelf
Best professional practices
Prune according to best professional praactices
show that pruning is needed
to maintain optimal plant
health.
Plants are dead, diseased or
Determine the source of the. problem: lolls, hydrology; disease, etc,
dying.
Remedy the probiem:and replaca.plants. Provide a one-time fertilizer
application to establish the ground cover If a soli test indicates It Is
necessary.
Weeds are present.
Remove the weeds, pre€erably by hand. If pesticide is used, wipe It on
the plants rather than spraying.
STORM-EZ 12/6/2019
verslon 1.A O&M Manual Page 2 of 4

:::..
•�.�: >>;�•;�:;,;; :r. � W - on: , on Iritsn nca-. u ttis� • d RtI �,� ^r.. -
;:r��..':w � .I7ete
The main treatment area
Sediment has accumu€sled to
A depth greater than the
original design sediment
Search for the source of the sediment and remedy.the.problem If
possible. Remove the sediment and disposepf it in a location where it
will not cause Impacts to streams or the BW
storage depth_
Algal growth covers over 50%
Consult a professional to remove and control the algal growth.
of the area.
Cattails, phragrnites or other
Remove the plants by wiping them mth pesticide (do not spray).
Invasive plants cover 60% of
the basin surface.
The embankment
Shrubs have started to grow
Remove shrubs immediately.
on- the embankment.
Evidence of.muskrat or
use traps. to. remove muskrats and consult a professional to remove
beaver act€v€ty is present.
beavers.
A tree has started to:grow on
Consult a:dam safety speciallst to remove the tree.
the embankment.
An annual inspection by an
Make all needed.repairs.
appropriate 'prafesslonal
shows that the embankment
needs repair. (if applicable)
The outlet device
Clogging. has occurred.
Clean out the. outlet. device,. Dispose of the sediment off -site.
The outlet device is damaged
Repalr or raplace.the dutlet device.
The receiving vuater
Erosion or other signs of
damage have occurred at the
Contact the local NC Department of Environment and Nature[
Resources Regional Office,
outlet.
The measuring device used to determine the sediment elevation shall be such that It uvill give an agate depth reading and not
readily penetrate into accumulated sediments.
STOR -EZ i2WO19
Version 1.4 O&M Manual Page 3 of

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_.r... -, <�rr..•n--�..:--:r.:�-.-.?'<�, - - gt•5 � Qav�i �'� � n - i�� ii�a . .�_:,�.' .°?� - ,:+k:-27. :x,.. :: v.ga�.i;, .r.;vn:.-.,
e d. i r
WET Pow to FOREBA1' MAIN POND
PO 1 permanent:Paol El. 812. PermanantTool El. 812
Tempoiary'Pao] El: 81175 Tempotary Pool El: 81178
PretreatmentoM No Clem auf Depth: 4 Clean.out Depth. 4
than forebay7 Sediment Removal El: 808 Sedlneent.Retnbval Et 808
Has Veg. Filter? Yes Bottom Elevation: 807 1 Bottom Elevation: 807
STORM-E2 12W2019'
Version1.4 O&M Manual Page'4 of 4