SW3100301_OandM

Permit Number.
-
(io be proidded by DW )
Drainage Area Number: ----
Wet Detention Basin Operation and Maintenance Agreement
I will keep a maintenance record on this BMP. This maintenance record will be kept in a
log in a. known set location. Any deficient BMP elements noted in the inspection will be
corrected, repaired or replaced immediately. These deficiencies can affect the integrity
of structures, safety of the public, and the removal efficiency of the BMP.
The wet detention basin system is defined as the wet detention basin,
pretreatment including forebays and the vegetated filter if one is provided.
This system (check one):
[] does ❑ does not incorporate a vegetated filter at the outlet.
This system (check one):
❑ does ❑ does not incorporate pretreatment other than a forebay.
Important maintenance procedures:
- Immediately after the wet detention basin is established, the plants on the
vegetated shelf and perimeter of the basin should be watered twice weekly if
needed, until 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 wet detention basin.
- If the basin must be drained for an emergency or to perform maintenance, the
flusl-dng of sediment through the emergency drain should be minimized to the
maximum extent practical.
- Once a year, a dam safety expert should inspect the embankment.
After the wet detention pond is established, it should be inspected once a month and
within 24 hours after every storm event greater than 1.0 inches (or 1.5 inches if in a
Coastal County), Records of operation and maintenance should be kept in a known set
location and must be available upon request.
Inspection activities shall be performed as follows. Any problems that are found shall
be repaired immediately,
BMP element:
�Fh_e �_n_fire FM_P
Uke yefliim,-ter .the
:ietention basin
Potential
Trash/debris is vre
Areas of bare soil and/or
erosive gullies have formed.
Vegetation is too short or too'
Regrade the soil if necessaryto-
remove the gully, and then plant a
ground cover and water until it is
established. Provide lime and a
one-time fertilizer application.
Maintain vegetation at a heightof
approximately six inches,
Form SW40 I -Wet Detention Basin O&M-Rev.4 Page 1 of 4

Form M400- et Det etion Basler f ld-Rev, 4 Page 2 of
Permit
(to bek.rovta`r' der f)ft���
Drainage Area Nrrarl r.
_ _ _ _3 PotentkilIr r rrrr
I will red t€* the
_._How
r€g et device: pipe or Tape is cloggej7
Unclog the pipe. Dispose of th(g.__.
sediment off-site_._
The pipe is cracked or
_ Replace the pipe,
Erosion is occurri_ng in the
l Regradethe swaleineces ary to
s ale.
smooth it over and provide erosion
control devices such as reinforced
turf matting; or rrprap to avoid
rrt!rre r +Ierags with erosion,
�q yy -y.
Thefore,€1 t r i Iris c.c �zr�rrt.l t�s€I
t E rch of th s€ urc of the
a depth greater than the
sediment and r enaedy the prole eraa if
original design depth for
d
possible, l erar.ove the sediment and
sediment: ret storage.
I disperse of it in a. location where it
will not cause impacts to strew' is or
�
Erosion has
v the II ._
cmc eared.
provide additional erosion
protection such as reinforced turf
f
}
aatting orriprap if needed to
_
revent frrtar e erosion rcrlrlems,..a
Weeds are present,
Remove Love the weeds, preferably b�,
I bin d. If pesticide is used, wipe it cert
to d s If _ Fest fessron
the_rlarrts rather than sra `zr,,:. __ a
pit l l)ractr€ c£s
Prune according to best professional
1 Shoo? that pruning is needed I practri"es
to Maintain optimal plant
�
healft
I'#amts da£ d .
e €In a s:>€I rzr1
Determine ine t eo r°c e of the
dying.
� problem: softs, Ir4�@€�l:rbc„�Iraly;�'pyycease,
etc, Remedy ylis
i d
3
replace plants. Provide a ori trrrr�
fertilizer application tcs establish the � �
glrou-nd cover if a soil test indicates j
it rs raec essarv,
f 3... Weeds aure present,
_
Remove the weeds prvferably by
hale& If pesticide is used, wipe e r€ ora.
_ _ �arrts rather thansir � rrrK°'
`I Ir. newer- treater-teat area Sediment has ac carrxrrriated t() �:arch for die, sou-rce of the _.
a depth greater than the
sedrrarent and re iedy the problerar .rf
Original design se€inentpossible.
Re.i)e the sediment and
I storage depth.
.
� dispose of it in a location Wbere it
I ra not cause impacts to streams or
g
: t EPI.a' o P.
Algal growth.. covers o=vor
Consult a professional to remove
50% of the arca
I reed control the at. alrc�ivt. N
_
attarls p ra: s artc=s or other
i 1° em-ove the plants by wiping the.
invasive planets cover 50 , of
t ithpesticide(do .not spray .
the nasrra surface.
...�,.�.e.a..-_.F....�...w..,.....n......,...,.�,...�,�.w.........�._.,................_,a.-...,.,_...a.�......,..,.._....,.....d.._,.a..a.,..,......,,..._......v..�..,,>_®..,,,...,a...<,.,»�...__...,..�._,.-,....._...«..m..P,,._......m....a®,__.........,_....�.....e_.._,..,....._.,._
Form M400- et Det etion Basler f ld-Rev, 4 Page 2 of

Permit Number: -------
(to be provided /ay D WQ)
Drainage Area Number:___
BMP element®
Potential problem:
How I will remediate the roblem:
The embankment
Shrubs have started to grow
on the embankment.
Remove shrubs immediately.
Evidence of muskrat or
beaver activity is present,
Use traps to remove muskrats and�
consult a professional to remove
beavers.
A tree has started to grow on
the embankment.
Consult a dam safety specialist to
remove the tree.
An annual inspection by an
appropriate professional
Make all needed repairs.
shows that the embankment
needs repair if a licabl-�—
The outlet device
Clogging has occurred.
Clean out the outlet device. —Dispose
of the sediment off-site.
The outlet device is damaged
Repair or replace the outlet device.
The receiving water
Erosion or other signs of
Contact the local NC Division of
damage have occurred at the
outlet.
Water Quality Regional Office, or
the 401 Oversight Unit at 919-733-
1786.
The measuring device used to determine the sediment elevation shall be such
that it will give an accurate depth reading and not readily penetrate into
accumulated sediments.
When the permanent pool depth reads 5.5 feet in the main pond, the sediment
shall be removed.
When the permanent pool depth reads 4.5 feet in the forebay, the sediment
shall be removed.
Sediment Removal
Bottom
BASIN DIAGRAM
(fill in the blanks)
510-00 PejrnanenN
------ --- Volume
\59.11 _0 /
��-ft Min.
Sediment
Storage
FOREBAY
Permanent Pool Elevation 514.50
Pool
------
Sediment Removal Elevation 509.00
------------ m �-- `_®m
Bottom Elevation
Form SW401-Wet Detention Basin O&M-Rev.4 Page 3 of 4
Volume
zu
Storage

Permit Number:
(to beprmlded b�v 1)[1 0)
I acknowledge and agree by my signature below that I am responsible f( -)r the
performance ofthe maintenallce procedures listed above, I agree to notify DW Q of any
problems with the system or prior to any changes to the system or responsible party, '
Project pp t Church
BHP drctincige avea number: I
Print name: John Croy ell
Title: Director
Address:4-20Ho e ell lurch load. Iona i
Phone:('l X53 -t0
Signature° 1-41"
Date.- z
Note: The legal]Nresponsible party should not be a homeoNN'ners association unless more than 50% of
tile tots have txen sold and a resident, of the subdivision has been named the president.
allotary, Public for the State of
curt
do hereby certify that
Cof
k"'ew �ga�
personally appeared before me this
day of
�/0 . and acknowledge the due execution of the
forgoing wet detention basin maintenance requirements, Witness my, hand and official
seat,
\\\\0\o\Mff1tjjj/j/'
1P �bikc
C \ jnw
0 S
es—
Si CO
TH ct�
My commission expires
_9
Form SW40 I -Wet Detention Basin O&M-Rev4 Page 4 of 4

Pernift Nuiuber
(to be proWded krDU10)
Thai Area Nurnber --- -
Filter Strip, Restored Riparian Buffer and Level Spreader
Operation and Maintenance Agreement
I will keep a maintenance record on this BMP, This maintenance record will be kept in a
log in a known set location, Any deficient BMP elements noted in the inspection will be
corrected, repaired, or replaced immediately, These deficiencies can affect the integrity
of structures, safety of the public, and the removal efficiency of the BMP.
Important maintenance procedures:
- Immediately after the filter strip is established, any newly planted vegetation
will be watered twice weekly if needed until the plants become established
(commonly six weeks).
- Once a year, the filter strip will be reseeded to maintain a dense growth of
vegetation
- Stable groundcover will be maintained in, the drainage area to reduce the
sediment load to the vegetation.
- Two to three times a year, grass filter strips will be mowed and the clippings
harvested to promote the growth of thick vegetation with optimum pollutant
removal efficiency. Turf grass should not be cut shorter than 3 to 5 inches and
may be allowed to grow as tall as 12 inches dependi ng on aesthetic requirements
(NIPC, 1993). Forested filter strips do not require this type of maintenance,
- Once a year, the soil will be aerated, if necessary.
- Once a year, soil pH will be tested and lime will be added if necessary,
After the filter strip is established, it will be inspected quarterly and within 24 hours
after every storm event greater than 1.0 inch (or 1.5 inches if in a Coastal County),
available upon request,
Inspection activities shall be performed as follows, ,Any problems that are found shall
N� repaired immediately,
'will retnediate the p
Ltit i _j
Reulow, trash/debriis'
The entire filter stilp- ("!'-ri-s is prescra
M
(ol-weyank'(", &td dispi,-Ys
T'he flow splitter a�e 1 -he flowsplitter dc - vice -is I Un 1- lH u
i (if applkable) fof anv sodbrei.it off-site,
J ile flow srifittor �11evk-e, is NJ�&A� 'iuv iso if (W
'ja (I replaice if fJjro,ageJ5 too larp fortt
re
For SWU401-Level Spreader, Filter Strip, Restored Riparian Buffer O&M-Rcv.3 Page I of 3

BMP element. Potential ole
1 How I will remediate the Lqrk!lr,,m-
The swaleand the level
r.
lip
I sediment.
ofit (:)ff iLe.
Tbe level lip is (nu
Re afrorreplace hp,
settled, undercut, crodied or
I (.Aherwise darnaved,
There is erosion around the
I Regyrade th(,,� soil to create a [-,erro
end of the level spreader that
that is higfier than the level bl), and
I shows sLorniwgat er Ild-S
Lh.en plant a lIround cover and
'is
bypassed it,
tvater until itestabfished.Provide
I 11111C, arld a one-time fertilimr
Tress or shrubs have began
1"etnove
to g -row on, the swalf? or fust
I
doc FIISIM of die level Irp.
'rite bypass chamiel
E areas of bare sf.:)iland/or
Regra.de the soil if necessIlry to
erosive gullies have fornied,
reniov(--� the gully, and tbert
reestablish p tp
�p�!.r erosion control,
Yurf reinforcement is
Study the site to see if alar ger
daniaged or ripap is rolhng
1 bypass channel is nooded lonlariye if
downhill.
necessary), Affer this, reestablish
the erosion controln'taterial,
1 The "i ter° ship,
Grass is too short or too, tong
Nlaintain g
grass at a height of
E el ar a agar aLet hre e to six in backs
Areas of bare soil and/or
Regrade the soil if nocessary to
crosive gullips have fortned,
remove the gully, and then plant a
ground cover and water until it is,
esLala hshed., Provide lime and a,
orae -time fi.--!rtihzor aUfictitlata -
w
f 5 dim(,ra is bufldii-qY up o
s Rera(we the sodiiiient and
Ow filter strip,
restabillize the soilwith vegetation if
ne(essary, Provide hirw and a- one- I
lime fertilize t,
nts are
Pla, desiccate(,[,
.y
Provide adclitional irri.,_r
,tion
"
fiertilizer as iu-edstL
Jants are dead, dbs�.-,a.„it j or
t Deterroine the scwrce of the
problorn., 4o 1p�drology disease,
Rentedy the probh-!ra aced
replace plants. Proviide a one-lill'O,
Nuisance vq),eWtiorl i's
Rem.ove vegt.,tation. by hand- if
chokint- out desiralble spc!,,Aes.
tpossible. if pesticide is used, do not
allow it to get into the ne-ivha,'!,
ter.
-----------
IC
The receiving water
Erosion or other signs of
nta t the NC'Division of VVater
dan"lac'e, ha� (-, occurred a On-
Qfj,lfita Rej-H outa 10
out -IOL
401 i I J * Unit at 919-733-1786.
Form SWU401-Level Spreader,, Filter Strip, Restored Riparian Buffer O&M -Rev -3 pale 2 of 3

Comm
(to be proWded bV D[fl"Q)
I acknowledge and agree by my signature below that I am responsible for the
performance of the maintenance procedures listed above, I agree to notify DWQ of
problems with the system or prior to any changes to the system or responsible party, I
Project name: -H
.ppewet 3apnisi fLurch
BMP drainage area mvember, I
Print namejohn CrQll
Title: Director
Address :420 HQpg-well_Church RQad,, mQnLoe c 2LI10
Note: The legally responsible party should not be a homeowners association imless more than 5(Plo of
the lots have been sold and a resident of the subdivision has been named the president,
Lor the tat
Se of
a Notary Public f
do hereby certify that
L
sonally appeared before me this
day cif �._ aid ackr�ca
wledge the due execution of the
forgoing filter strip, riparian buffer, and/or level spreader maintenance requirements,
Witness my hand and official seal,
� I I i I i I 11toll,
S I M PS
O�
0
latary public S
Unton county
ties=
My yam 2` P
C
OM
My commission expires —git—o4ka—
Foan. SWU401-Level Spreader, Filter Strip, Restored Riparian Buffer O&M-Rev.3 Page -3 ofl