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Return Address:
C:ty Clerk's Office
CityofRenton 20160624000335
1055 S Grady Way CITY OF RENTON COV 163.00
Renton,WA 98057 06G2402016F10185
KING COUNTY, WA
DECLARATION OF COVENANT FOR INSPECTION AND
MAINTENANCE OF STORMWATER FACILITIES AND BMPS
Grantor: RI Renton Land Acquisition (BGC), LLC
Grantee: City of Renton
Legal Description: See attached Exhibit'C'
Assessor's Taa�Parcel ID#: 082305-9056-04 and 334450-0006-02
IN CONSIDERATION of the approved City of Renton site development permit
for application file No. LUA/SWP 15-000673 relating to the real property("Property")
described above,the Grantor(s),the owner(s)in fee of that Property,hereby covenants(covenant)with the
City of Renton,a political subdivision of the state of Washington,that he/she(they)will observe,consent
to,and abide by the conditions and obligations set forth and described in Paragraphs 1 through 10 below
with regard to the Property, and hereby grants(grant)an easement as described in Paragraphs 2 and 3.
Grantor(s)hereby grants(grant),covenants(covenant),and agrees(agree)as follows:
1. The Grantor(s)or his/her(their)successors in interest and assigns("Owners of the described
property")shall at their own cost, operate, maintain, and keep in good repair,the Propecty's stormwater
facilities and/or best management practices("BMPs") constructed as required in the approved
construction plans and specifications U15008434 on file with the City of Renton and submitted to the
City of Renton for the review and approval of permit(s) U15008433 . The
property's stormwater facilities and/or best management practices("BMPs")are shown and/or listed on
Exhibit A.The property's stormwater facilities and/or BMPs shall be maintained in compliance with the
operation and maintenance schedule included and attached herein as Exhibit B. Stormwater facilities
► i es swales tanks vaults onds and other en ineered structures desi ned to mana e and/or
incl�de p p , , , ,p , g g g
treat stormwater on the Property. Stormwater BMPs include dispersion and infiltration devices,native
vegetated areas, permeable pavements, vegetated roofs,rainwater harvesting systems,reduced impervious
Isurface coverage, and other measures designed to reduce the amount of stormwater runoff on the
Property.
2. City of Renton shall have the right to ingress and egress over those portions of the Property
necessary to perform inspections of the stormwater facilities and BMPs and conduct maintenance
activities specified in this Declaration of Covenant and in accordance with RMC 4-6-030.
3. If City of Renton determines that maintenance or repair work is required to be done to any of 'I
the stormwater facilities or BMPs,City of Renton shall give notice of the specific maintenance and/or
repair work required pursuant to RMC 4-6-030. The City shall also set a reasonable time in which such
Page 1 of 3 Form Approved by City Attorney 10/2013
15564.009.pdf
. � ' r
work is to be completed by the Owners. If the above required maintenance or repair is not completed
within the time set by the City,the City may perform the required maintenance or repair, and hereby is
given access to the Property, subject to the exclusion in Paragraph 2 above, for such purposes. Written
notice will be sent to the Owners stating the City's intention to perform such work. This work will not I
commence until at least seven(7)days after such notice is mailed. If,within the sole discretion of the
City,there exists an imminent or present danger,the seven(7)day notice period will be waived and
maintenance and/or repair work will begin immediately.
4. If at any time the City of Renton reasonably determines that a stormwater facility or BMP on
the Property creates any of the hazardous conditions listed in RMC 4-4-060 G or relevant municipal
successor's codes as applicable and herein incorporated by reference,the City may take measures
specified therein.
5. The Owners shall assume all responsibility for the cost of any maintenance or repair work
completed by the City as described in Paragraph 3 or any measures taken by the City to address hazardous
conditions as described in Paragraph 4. Such responsibility shall include reimbursement to the City
within thirty(30)days of the receipt of the invoice for any such work performed. Overdue payments will
require payment of interest at the current legal rate as liquidated damages. If legal action ensues,the
prevailing party is entitled to recover reasonable litigation costs and attorney's fees.
6. The Owners are hereby required to obtain written approval from City of Renton prior to
filling, piping, cutting,or removing vegetation(except in routine landscape maintenance) in open
vegetated stormwater facilities(such as swales,channels, ditches,ponds, etc.),or performing any
alterations or modifications to the stormwater facilities and BMPs referenced in this Declaration of
Covenant.
7. Any notice or consent required to be given or otherwise provided for by the provisions of this
Agreement shall be effective upon personal delivery,or three(3)days after mailing by Certified Mail,
return receipt requested.
8. With regard to the matters addressed herein,this agreement constitutes the entire agreement
between the parties,and supersedes all prior discussions,negotiations,and all agreements whatsoever
whether oral or written.
9. This Declaration of Covenant is intended to protect the value and desirability of the real
property described above, and shall inure to the benefit of all the citizens of the City of Renton and its
successors and assigns. This Declaration of Covenant shall run with the land and be binding upon
Grantor(s),and Grantor's(s')successors in interest,and assigns.
10. This Declaration of Covenant may be terminated by execution of a written agreement by the
Owners and the City that is recorded by King County in its real properiy records.
IN WITNESS WHEREOF,this Declaration of Covenant for the Inspection and Maintenance of
Stormwater Facilities and BMPs is executed this %g day of ��J ,20��.
�,r JQ�it�an����iiSill�n��GC)J LLG
GRANTOR,owner of the Property
�' ,(� ��.,�C� - ��e �°��s��..��/p
,
GRANT e
Page 2 of 3 Form Approved by City Attorney 10/2013
15564.009.pdf
i , � �
T�xas
STATE OF )
COLJNTY OF�I4�E' )ss.
�a i tas
On this day personally appeared before me:
I�V�(C�IG�p I rVI��iD�I P.,1�1,���,L (�Y�SI(�Q f2-� , to me known to be the individual(s)described in
and who executed the within and foregoing instruinent and acknowledged that they signed the same as
their free and voluntary act and deed, for the uses and purposes therein stated.
Given under my hand and official seal this 1�J day of _,20 ��P .
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`'��" '�V1 A�� �,Gt�( '�lil
.•�"'Y�''. KAiHRYN lAYiON
;i°'�"'u`�=Notary Public,state or rexos Printed na e
:�.����e Comm.Expires 09-06-20)7 Notary Public in and for the State of��g�en, (eXG�
��'%F�`��'�, Notary ID 12955056-A residing at
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My appointment expires �� ' a1�0 ' ��(�I—(
Page 3 of 3 Form Approved by City Attorney 10/2013
� EXHIBIT A
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AREA I
/ DRAINS /
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WATER �
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QUALITY /
VAULT /�
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RESIDENCE �
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Cheeked _ w�` � KENT, WA 98032
Sheet '�� (425)251-6222 T�t�B:
��a� _ o � (425)251-8782 FAX FACILITIES OVERVIEW
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1 DOf! 2016-02-23 �G`r�NG ENGM��P� SURVEYI�NC.�ENVIRON�AL SERVICES
MARRIOTT RESIDENCE INN
EXHIBIT B
OPERATION AND MAINTENANCE
SCHEDULE
TEXT OF INSTRUCTIONS FOR NON-VEGETATED PERMEABLE PAVEMENT
Your property contains a stormwater management flow control BMP (best management practice) called
"permeable pavement," which was installed to minimize the stormwater quantity and quality impacts of
some or all of the paved surtaces on your property. Permeable pavements reduce the amount of rainfall
that becomes runoff by allowing water to seep through the pavement into a free-draining gravel or sand
bed, where it can be infiltrated into the ground.
The type(s) of permeable pavement used on your property is: 0 porous concrete, � porous asphaltic i,
concrete, ❑ permeable pavers, ❑ modular grid pavement.
The area covered by permeable pavement as depicted by the flow control BMP site plan and design
details must be maintained as permeable pavement and may not be changed without written approval
either from the King County Water and Land Resources Division or through a future development permit
from King County.
Permeable pavements must be inspected after one major storm each year to make sure it is working
properly. Prolonged ponding or standing water on the pavement surface is a sign that the system is
defective and may need to be replaced. If this occurs, contact the pavement installer or the King County
Water and Land Resources Division for further instructions. A typical permeable pavement system has a
life expectancy of approximately 25-years. To help extend the useful life of the system, the surface of the
permeable pavement should be kept clean and free of leaves, debris, and sediment through regular
sweeping or vacuum sweeping. The owner is responsible for the repair of all ruts, deformation, and/or
broken paving units.
NO. 3 - DETENTION TANKS AND VAULTS
Maintenance Defect or Problem Conditions When Maintenance is Naeded Results Expected When
Component Maintenance is Performed
Site Trash and debris Any trash and debris which exceed 1 cubic foot Trash and debris cleared from site.
per 1,000 square feet(this is about equal to the
amount of trash it would take to fill up one
standard size office garbage can). In general,
there should be no visual evidence of dumping.
No�tious weeds Any noxious or nuisance vegetation which may No�tious and nuisance vegetation
' constitute a hazard to County personnel or the removed according to applicable
public. regulatlons. No danger of noxious
vegetation where County personnel
or the public might nortnally be.
' Contaminants and Any evidence of contaminants or poliution such Materials removed and disposed of
pollution as oil,gasoline,concrete slurties or paint. according to applicable regulations.
Source control BMPs implemented if
, appropriate. No contaminants
present other than a surface oil film.
Grass/groundcover Grass or groundcover exceeds 18 inches in Grass or groundcover mowed to a
height. height no greater than 6 inches.
Tank or Vault Trash and debris My trash and debris accumulated in vault or No trash or debris in vault.
Storege Area tank(includes floatables and non-floatables).
Sediment Accumulated sediment depth exceeds 10�0 of All sediment removed from storege
accumulation the diameter of the storage area for'/�length of area.
storage vault or any point depth exceeds 15°k of
diameter. Example:72-inch storege tank would
require cleaning when sediment reaches depth of
7 inches for more than%length of tank.
Tank SVucture Plugged air vent Any blockage of the vent. Tank or vault freely vents.
Tank bent out of Any part of tank/pipe is bent out of shape more Tank repaired or replaced to design.
shape than 10%of its design shape.
Gaps beMreen A gap wider than'/rinch at the joint of any tank No water or soil entering tank
sections,damaged sections or any evidence of soil particles entering through joints or walls.
joints or cracks or the tank at a joint or through a wall.
tears in wall
Vault Structure Damage to wall, Cracks wider than Yrinch,any evidence of soil Vault is sealed and structurally
frame,bottom,and/or entering the structure through cracks or qualified sound.
top slab inspection personnel determines that the vault is
not structurally sound.
In1eU0utlet Pipes Sediment Sediment filling 20°/a or more of the pipe. Inleboutlet pipes clear of sediment.
accumulation
h n debris Trash and debris accumulated in inlet/ouUet No trash or debris in pipes.
Tras a d
pipes(includes floatables and non-floatables).
Damaged Cracks wider than'/rinch at the joint of the No cracks more than'/.-inch wide at
inleUoutlet pipes or any evidence of soil entering the joint of the inleUoutlet pipe.
at the joints of the inleUoutlet pipes.
2016 Surface Water Desi�Manual—Appendix A 4/24/2016
A-5
NO. 3 - DETENTION TANKS AND VAULTS
Maintenance Defect or Problem Conditions When Maintenance is Needed Resulta Expected When
Component Maintenance is Performed
Access Manhole Covedlid not in place Cover/lid is missing or only partially in place. Manhole access covered.
Any open manhole requires immediate
maintenance.
Locking mechanism Mechanism cannot be opened by one Mechanism opens with proper tools.
not working maintenance person with proper tools.Bolts
cannot be seated. Self-locking covedlid does not
work.
Cover/lid difficult to One maintenance person cannot remove CoveNlid can be removed and �
remove wverllid after applying 80 Ibs of lift. reinstalled by one maintenance ',
person.
Ladder rungs unsafe Missing rungs,misalignment,rust,or crecks. Ladder meets design standards.
Allows maintenance person safe
access.
Large access Damaged or difficult Large access doors or plates cannot be Replace or repair access door so it
doors/plate to open opened/removed using normal equipment. can opened as designed.
Gaps,doesn't cover Large access doors not flat and/or access Doors close flat;covers access
completely opening not completely covered. opening completely.
Lifting Rings missing, Lifting rings not capable of lifting weight of door Lifting rings sufficient to lift or
rusted or plate. remove door or plate.
4/24/2016 2016 Surface Water Design Manual—Appendix A
A-6
NO. 4 - CONTROL STRUCTURE/FLOW RESTRICTOR
Maintenance Defect or Problem Condition When Maintenance is Needed Results Expected When
Component Maintenance is Performed
Structure Trash and debris Trash or debris of more than'/:cubic foot which No Trash or debris blocking or '
is located immediately in front of the structure potentially blocking entrance to
opening or is blocking capacity of the structure structure.
by more than 10%.
Trash or debris in the structure that exceeds�/3 No trash or debris in the structure.
the depth from the bottom of basin to invert the
lowest pipe into or out of the basin.
Deposits of garbage exceeding 1 cubic foot in No condition present which would
volume. attract or support the breeding of
insects or rodents.
Sediment Sediment exceeds 60%of the depth from the Sump of structure contains no
bottom of the structure to the inveR of the lowest sediment.
pipe into or out of the structure or the bottom of
the FROP-T section or is within 6 inches of the
invert of the lowest pipe into or out of the
structure or the bottom of the FROP-T section.
Damage to frame Comer of frame extends more than'/.inch past Freme is even with curb.
and/or top siab curb face into the street(If applicable).
Top slab has holes larger than 2 square inches Top slab is free of holes and cracks.
or cracks wider than Y.inch.
Frame not sitting flush on top slab,i.e., Frame is sitting flush on top slab.
separation of more than'/,inch of the frame from
the top slab.
Cracks in walls or Cracks wider than'/:inch and longer than 3 feet, Structure is sealed and structurally
bottom any evidence of soil particles entering structure sound.
through cracks,or maintenance person judges
that structure is unsound.
Cracks wider than Y:inch and longer than 1 foot No cracks more than'/a inch wide at
at the joint of any inleUoutlet pipe or any the joint of inletloutlet pipe.
evidence of soil particles entering structure
through cracks.
Settlement/ Structure has settled more than 1 inch or has Basin replaced or repaired to design
misalignment rotated more than 2 inches out of alignment. standards.
Damaged pipe joints Cracks wider than Yrinch at the joint of the No cracks more than'/a-inch wide at
inleUoutlet pipes or any evidence of soil entering the joint of inleUoutlet pipes.
the structure at the joint of the inleUoutlet pipes.
Contaminants and Any evidence of contaminants or pollution such Materials removed and disposed of
pollution as oil,gasoline,concrete slurties or paint. according to applicable regulations.
Source control BMPs implemented if
appropriate. No contaminants
present other than a surface oil film.
Ladder rungs missing Ladder is unsafe due to missing rungs, Ladder meets design standards and
or unsafe misalignment,rust,cracks,or sharp edges. allows maintenance person safe
access.
FROP-T Section Damage T section is not securely attached to structure T section securely attached to wall
wall and outlet pipe structure shouid support at and ouUet pipe.
least 1,000 Ibs of up or down pressure.
Structure is not in upright position(allow up to Structure in correct position.
10%from plumb).
Connections to outlet pipe are not wateRight or Connections to outlet pipe are water
show signs of deteriorated grout. tight;structure repaired or replaced
and works as designed.
Any holes--0ther than designed holes—in the Structure has no holes other than
structure. designed holes.
2016 Surface Water Design Manual–Appendix A 4/24/2016
A-7
NO. 4 - CONTROL STRUCTURE/FLOW RESTRICTOR
' Maintenance Defact or Problem Condition When Maintenance is Needed Reaults Expected When
Component Maintenance is Performed
Cleanout Gate Damaged or missing Cleanout gate is missing. Replace cleanout gate.
' Cleanout gate is not watertight. Gate is watertight and works as
' designed.
Gate cannot be moved up and down by one Gate moves up and down easily and
maintenance person. is wateRight.
ChaiNrod leading to gate is missing or damaged. Chain is in place and works as
designed.
Orifice Plate Damaged or missing Control device is not working properly due to Plate is in place and works as
missing,out of place,or bent orifice plate. designed.
Obstructions Any trash,debris,sediment,or vegetation Plate is free of all obstructions and
blocking the plate. works as designed.
Overflow Pipe Obstructions My trash or debris blocking(or having the Pipe is free of all obsVuctions and
potential of blocking)the overflow pipe. works as designed.
Defortned or Lip of overflow pipe is bent or defortned. Overflow pipe does not allow
damaged lip ovefiow at an elevation lower than
design
InIeUOutlet Pipe Sediment Sediment filling 20°/a or more of the pipe. InleUoutlet pipes clear of sediment.
accumulation
Trash and debris Trash and debris accumulated in inleUoutlet No trash or debris in pipes.
pipes(inGudes floatables and non-floatables).
' Damaged Cracks wider than Yrinch at the joint of the No cracks more than'/.-inch wide at
inleUoutlet pipes or any evidence of soil entering the joint of the inlet/outlet pipe.
at the joints of the inleUoutlet pipes.
Metal Grates Unsafe grate opening Grate with opening wider than�/e inch. Grate opening meets design i
(If Applicable) standards.
Trash and debris Trash and debris that is blocking more than 20% Grate free of Vash and debris.
of grate surface. footnote to guidelines for disposal
Damaged or missing Grate missing or broken member(s)of the grate. Grate is in place and meets design
standards.
Manhole Cover/Lid Cover/lid not in place Cover/lid is missing or only partially in place. Cover/lid protects opening to
My open structure requires urgent structure.
maintenance.
Locking mechanism Mechanism cannot be opened by one Mechanism opens with proper tools.
Not Working maintenance person with proper tools.Bolts
cannot be seated. Self-locking covedlid dces not
work.
Covedlid difficult to One maintenance person cannot remove Covedlid can be removed and
Remove cover/lid after applying 80 Ibs.of lift. reinstalled by one maintenance
person.
4/24/2016 2016 Surface Water Design Manual—Appendix A
A-8
NO. 5 - CATCH BASINS AND MANHOLES
Maintenance Defact or Problem Condition When Maintenance is Needed Results Expectad When
Component Maintenance is PerFortned
Structure Sediment Sedimerrt exceeds 60%of the depth from the Sump of catch basin contains no
bottom of fhe catch basin to the invert of the sediment.
lowest pipe into or out of the catch basin or is
within 6 inches of the inveR of the lowest pipe
into or out of the catch basin.
Trash and debris Trash or debris of more than Yz cubic foot which No Trash or debris blocking or
is located immediately in front of the catch basin potentially blocking entrance to
opening or is blxking capacity of the catch basin catch basin.
, by more than 10%.
Trash or debris in the catch basin that exceeds No trash or debris in the qtch
'/s the depth from the bottom of basin to invert basin.
the lowest pipe into or out of the basin.
Dead animals or vegetation that could generate No dead animals or vegetation
odors that could cause complaints or dangerous present within catch basin.
gases(e.g.,methane).
Deposits of garbage exceedfng 1 cubic foot in No condition present which would
volume. attract or support the breeding of
insects or rodents.
Damage to frame Comer of frame extends more than'/.inch past Frame is even with curb.
and/or top slab curb face into the street(If applicable).
Top slab has holes larger than 2 square inches Top slab is free of holes and cracks.
' or cracks wider than Y,inch.
Frame not sitting flush on top slab,i.e., Frame is sitting flush on top slab.
separation of more than'/,inch of the frame from
the top slab.
Cracks in walls or Cracks wider than'/:inch and longer than 3 feet, Catch basin is sealed and is
bottom any evidence of soil particles entering catch structurally sound.
basin through cracks,or maintenance person
� judges that catch basin is unsound.
Cracks wider than'/z inch and longer than 1 foot No cracks more than�/4 inch wide at
at the joint of any inleUoutlet pipe or any the joint of inletlouUet pipe.
evidence of soil particles entering catch basin
through cracks.
SettlemenU Catch basin has settled more than 1 fnch or has Basin replaced or repaired to design
misalignment rotated more than 2 inches out of alignment. standards.
Damaged pipe joints Cracks wider than'/rinch at the joint of the No cracks more than'/.-inch wide at
inleUouUet pipes or any evidence of soil entering the joint of inleUoutlet pipes.
the catch basin at the joint of the inlet/outlet
pipes.
Contaminants and Any evidence of contaminants or pollution such Materials removed and disposed of
pollution as oil,gasoline,concrete slurties or paint. according to applicable regulations.
Source control BMPs implemented if
appropriate. No contaminants
present other than a surface oil film.
InIeUOutlet Pipe Sediment Sediment filling 20%or more of the pipe. InleUoutlet pipes dear of sediment.
accumulation
Trash and debris Trash and debris accumulated in inleUoutlet No trash or debris in pipes.
pipes(includes floatables and non-floatables).
Damaged Cracks wider than'/rinch at the joint of the No cracks more than'/.-inch wide at
inleUoutlet pipes or any evidence of soil entering the joint of the inlet/outlet pipe.
at the joints of the inleUouttet pipes.
2016 Surface Water Design Manual—Appendix A 4/24/2016
A-9
NO. 5 - CATCH BASINS AND MANHOLES
Maintenance Defect or Problem Conditlon When Maintenance is Needed Results Expected When
Component Maintenance is PerFormed
Metal Grates Unsafe grate opening Grate with opening wider than�/e inch. Grate opening meets design
(Catch Basins) standards.
Trash and debris Trash and debris that is blocking more than 20% Grate free of trash and debris.
of grate surface. footnote to guidelines for disposal
Damaged or missing Grate missing or broken member(s)of the grate. Grate is in place and meets design
My open structure requlres urgent standards.
malntenance.
Manhole Cover/Lid CoveNlid not in place Covedlid is missing or only partiaily in place. Cover/lid protects opening to
My open structure requires urgent sUucture.
malntenance.
Locking mechanism Mechanism cannot be opened by one Mechanism opens with proper tools.
Not Working maintenance person with proper tools.Bolts
cannot be seated. Self-locking cover/lid does not
worlc.
Cover/lid difficult to One maintenance person cannot remove Cover/fid can be removed and
Remove covedlid after applying 80 Ibs.of lift. reinstalled by one maintenance
person.
4/24/2016 2016 Surface Water Design Manual—Appendix A
A-10
NO. 6 - CONVEYANCE PIPES AND DITCHES
Maintanance Defect or Problem Conditions When Maintenance is Naedad Results Expected When
, Component Maintenance is PerFormed
Pipes Sediment 8 debris Accumulated sediment or debris that exceeds Water flows freely through pipes.
accumulation 20°h of the diameter of the pipe.
VegetatioNroots VegetatioNroots that reduce free movement of Water flows freely through pipes.
water through pipes.
Contaminants and Any evidence of contaminants or pollution such Materials removed and disposed of
pollution as oil,gasoline,concrete slurries or paint. according to applicable regulations.
Source control BMPs implemented if
appropriate. No contaminants
present other than a surface oil film.
Damage to protective Protective coating is damaged;rust or corrosion Pipe repaired or replaced.
coating or corrosion is weakening the structural integrity of any paR of
pipe.
Damaged Any dent that decreases the cross sedion area Pipe repaired or replaced.
of pipe by more than 20%or is detertnined to
have weakened structural integrity of the pipe.
Ditches Trash and debris Trash and debris exceeds 1 cubic foot per 1,000 Tresh and debris cleared from
square feet of ditch and slopes. ditches.
Sediment Accumulated sediment that exceeds 20%of the Ditch cleaned/flushed of all
accumulation design depth. sediment and debris so that it
matches design.
Noxious weeds Any noxious or nuisance vegetation which may Noxious and nuisance vegetation
constitute a hazard to County personnel or the removed according to applicable
public. regulations. No danger of noxious
vegetation where County personnel
or the public might nortnally be.
Contaminants and Any evidence of contaminants or pollution such Materials removed and disposed of '
pollution as oil,gasoline,concrete slurries or paint. according to applicable regulations.
Source control BMPs implemented if
appropriate. No contaminants
present other than a surface oil film.
Vegetation Vegetation that reduces free movement of water Water flows freely through ditches.
through ditches.
Erosion damage to Any erosion observed on a ditch slope. Slopes are not eroding.
slopes
Rock lining out of One layer or less of rock exists above native soil Replace rocks to design standards.
place or missing(If area 5 square feet or more,any exposed native
Applicable) soil.
2016 Surface Water Design Manual—Appendix A 4/24/2016
A-I1
NO. 11 - GROUNDS (LANDSCAPING)
Maintenance Defect or Problem Conditions When Maintenance is Needed Resulta Expected When
Component Maintenance is PerFortned
Site Trash or litter Any trash and debris which exceed 1 cubic foot Trash and debris cleared from site.
per 1,000 square feet(this is about equal to the
amount of trash it would take to fill up one
standard size office garbage can). In general,
there should be no visual evidence of dumping.
Noxious weeds Any noxious or nuisance vegetation which may Noxious and nuisance vegetation
constitute a hazard to County personnel or the removed according to applicable
public. regulations. No danger of noxious
vegetation where County personnel
or the public might nortnally be.
Contaminants and Any evidence of contaminants or pollution such Materials removed and disposed of
pollution as oil,gasoline,concrete slurties or paint. according to applicable regulations.
Source controi BMPs implemented if
, appropriate. No contaminants
, present other than a surface oil film.
Grass/groundcover Grass or groundcover exceeds 18 inches in Grass or groundcover mowed to a
height. height no greater than 6 inches.
Trees and Shrubs Hazard Any tree or limb of a tree identified as having a No hazard trees in facility.
potential to fall and cause property damage or
threaten human life. A hazard tree Identifled by
a qualifled arborist must be removed as soon
as possible.
Damaged Limbs or parts of trees or shrubs that are split or Trees and shrubs with less than 5%
broken which affect more than 25%of the total of total foliage with split or broken
foliage of the tree or shrub. limbs.
Trees or shrubs that have been blown down or No blown down vegetation or
knocked over. knocked over vegetation. Trees or
shrubs free of injury.
Trees or shrubs which are not adequately Tree or shrub in place and
supported or are leaning over,causing exposure adequately supported;dead or
of the roots. diseased trees removed.
4/24/2016 2016 Surface Water Design Manual—Appendix A
A-16
Maintenance Guidelines for
Modular Wetland System - Linear
Maintenance Summarv
- ' t rval is 6 to 12 months.
� o Remove Trash from Screenin Device average maintenance in e
( 5 minute average service time)
o Remove Sediment from Separation Chamber-average maintenance interval is 12 to 24 months.
( 10 minute average service time)
o Replace Cartridge Filter Media-average maintenance interval 12 to 24 months.
( 10-15 minute cartridge average service time)
o Re lace Drain Down Filter Media-avera e maintenance interval is 12 to 24 months.
9
( 5 minute average service time)
o Trim Vegetation-average maintenance interval is 6 to 12 months.
( Service time varies)
www.rr�odu larwetlands.com
Maintenance Procedures
Screeninq Device
1. Remove grate or manhole cover to gain access to the screening device in the Pre-
Treatment Chamber. Vault type units do not have screening device. Maintenance
can be performed without entry.
2. Remove all pollutants collected by the screening device. Removal can be done
manually or with the use of a vacuum truck. The hose of the vacuum truck will not
damage the screening device.
3. Screening device can easily be removed from the Pre-Treatment Chamber to gain
access to separation chamber and media filters below. Replace grate or manhole
cover when completed.
Separation Chamber
1. Perform maintenance procedures of screening device listed above before
maintaining the separation chamber.
2. With a pressure washer spray down pollutants accumulated on walls and cartridge
filters.
3. Vacuum out Separation Chamber and remove all accumulated pollutants. Replace
screening device, grate or manhole cover when completed.
Cartridqe Filters
1. PerForm maintenance procedures on screening device and separation chamber
before maintaining cartridge filters.
2. Enter separation chamber.
3. Unscrew the finro bolts holding the lid on each cartridge filter and remove lid.
4. Remove each of 4 to 8 media cages holding the media in place.
5. Spray down the cartridge filter to remove any accumulated pollutants.
6. Vacuum out old media and accumulated pollutants.
7. Reinstall media cages and fill with new media from manufacturer or outside
supplier. Manufacturer will provide specification of inedia and sources to purchase.
8. Replace the lid and tighten down bolts. Replace screening device, grate or
manhole cover when completed.
Drain Down Filter
1. Remove hatch or manhole cover over discharge chamber and enter chamber.
2. Unlock and lift drain down filter housing and remove old media block. Replace with
new media block. Lower drain down filter housing and lock into place.
� 3. Exit chamber and re lace hatch or manhole cover.
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Maintenance Notes
1. Following maintenance and/or inspection, it is recommended the maintenance
operator prepare a maintenance/inspection record. The record should include any
maintenance activities performed, amount and description of debris collected, and
condition of the system and its various filter mechanisms.
2. The owner should keep maintenance/inspection record(s)for a minimum of five
years from the date of maintenance. These records should be made available to
the governing municipality for inspection upon request at any time.
3. Transport all debris, trash, organics and sediments to approved facility for disposal
in accordance with local and state requirements.
4. Entry into chambers may require confined space training based on state and local
regulations.
5. No fertilizer shall be used in the Biofiltration Chamber.
6. Irrigation should be provided as recommended by manufacturer and/or landscape �
architect. Amount of irrigation required is dependent on plant species. Some plants
may require irrigation.
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Maintenance Procedure Illustration
Screeninq Device Cartridae Filters
The screening device is located directly The cartridge filters are located in the
under the manhole or grate over the Pre-Treatment chamber connected to
Pre-Treatment Chamber. It's mounted the wall adjacent to the biofiltration
directly underneath for easy access chamber. The cartridges have
and cleaning. Device can be cleaned by removable tops to access the
hand or with a vacuum truck. individual media filters. Once the
cartridge is open media can be
easily removed and replaced by hand
or a vacuum truck.
Separation Chamber
The separation chamber is located Drain Down Filter
directly beneath the screening device. The drain down filter is located in the
It can be quickly cleaned using a Discharge Chamber. The drain filter
vacuum truck or by hand. A pressure unlocks from the wall mount and hinges
washer is useful to assist in the up. Remove filter block and replace with
cleaning process. new block.
Trim Veqetation
Vegetation should be maintained in the
same manner as surrounding vegetation
and trimmed as needed. No fertilizer shall
be used on the plants. Irrigation
per the recommendation of the
manufacturer and or landscape
architect. Different types of vegetation
requires different amounts of �
irrigation. '
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