HomeMy WebLinkAbout2018 - Declaration of Covenant for Inspection and Maintenance of Storm Water Facilities and BMPS - City of Tukwila / SEBCO - 20181106000851Return Address:
CITY OF TUKWILA
Office of the City Clerk
6200 Southcenter Blvd.
Tukwila, WA 98188
(206) 433-1800
11
11
20181106000851
COVENANT Rec: $118.00
11/0/2018 2:00 PM
KING COUNTY, WA
CITY OF TUKWILA
DOCUMENT RECORDING
COVER SHEET
Document Title: Declaration of Covenant for Inspection and
Maintenance of Storm Water Facilities and BMPS
Parties: City of Tukwila, WA
6200 Southcenter Boulevard
Tukwila, WA 98188
Other: SEBCO, Inc.
Company Name (if business)
4020 East Madison Street, Suite 320
Address
Seattle, WA 98112
City State Zip
Legal Description: A Portion of the SE % of the SE % and SW % of the SW %,
Sec.3, T. 23N., R4E., W.M., in King County, Washington
Assessor's Property Tax Parcel/Account Number:
042304-9014
Return to:
City Clerk
City ofTukwila
G2OOSnudhcenterBoulevard
Tukwila, WA 98188
DECLARATION OFCOVENANT
FOR INSPECTION AND MAINTENANCE OF STORMWATER FACILITIES AND BMPS
Grantor: GE8CD. Inc., aVVaohinghon State Profit Corporation
Grantee: CITY OFTUKVV|LA.omunicipal corporation ofKing County, Washington
Abbreviated Legal Description:
Aportion ofthe SE1/4ofthe SE1/4and SW1Nofthe SW1/4.
Soc. 3, T. 23 N, R4 E, VV.K8, in King County, Washington
Assessor's Tax Parcel |DNo. O423O40O14
IN CONSIDERATION of Public Works final inspection for City of Tukwila Permit No. PVV16'0180
relating to veal property ("Property") described in Exhibit ''Y\" attached hereto and by this reference
incorporated herein. the Grentor, the owner in fee of that Pruperty, hereby covenants with the City of
Tukwi|a, a municipal corporation of the State of VVaohington, that it will oboeme, consent to, and abide by
the conditions and obligations set forth and described in Paragraphs 1 through 10 below with regard to the
Propedy, and hereby grants an easement as described in Paragraphs 2 and 3. Grantor hereby grants,
covenants, and agrees osfollows:
1. The Grantor or it's auoconoora in interest and assigns (''Ovvnorn'') shmU, at its own oost,
operate, mointain, and keep in good repair, the Property's otormwotorfeni|itiee and beet management
practices (''ByNPu") identified in the plans and specifications submitted to the City ofTukwila for the review
and approval of Permit No. PVV16'0180. Stormwater facilities include pipeo, catch basinn, storm filters,
swales, and other engineered structures designed to manage stormwater on the Property.
2. The City of Tukwila shall have the right to ingress and egress over those portions of the
18176o1 5.doo Page |*f8
Property necessary to pedbnn inspections of the stonnwoter facilities and BK8Pe and conduct other
aohvhioe specified in this Declaration of Covenant and in accordance with City of Tukwila Code ('TW1C'')
1430.80. This right of ingress and eAreoa, right to inopeot, and right to perform required maintenance or
repair is provided for in Section 3 below.
3. If the City of Tukwila determines that maintenance or repair work is required to be done to any
of the atormweter facilities or B&4Pa. the Director of Public Works ("Director") shall give notice of the
specific maintenance and/or repair work required pursuant to TIVIC 14.30.80. The Director shall also set a
reasonable time inwhich such work iahobacompleted bythe Owner. |fthe above required maintenance
or repair is not completed within the time set by the Director, the City may perform the required
maintenance or nepair, and hereby is given access to the Propedy, subject to the exclusion in Paragraph 2
above, for such purposes. Written notice will besent tothe Owner stating the City'a intention toperform
such work. This work will not commence until at least seven (7) days after such notice is mailed. If, within
the sole discretion of the Director, 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 Tukwila reasonably determines that a stormwater facility or BN1P on
the Property creates any ofthe hazardous conditions listed in TN1C 14.30.80 and herein incorporated by
reference, the Director or equivalent municipal successors official may take measures specified therein.
5. The Owner 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 asdescribed inParagraph 4. Such responsibility shall include reimbursement tothe
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. |flegal action ensues, the
prevailing party is entitled to costs or fees.
G. The Owner is hereby required to obtain written approval from the Director of Public Works prior
to fiUing, piping, nutting, or removing vegetation (except in routine landscape maintenance) in open
vegetated etonnwaber facilities (such as ewa|eo, chenne|a, dih:hea, ponda, etcj, or performing any
alterations or modifications to the ohormwater facilities and BN1Ps 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 oheU be effective upon personal delivery or three (3) days after mailing by Certified N1ai|,
Return Receipt Requested tothe address listed below for that party:
18176.015.duu Page 2"f8
City Clerk
City ofTukwila
820}SouthcenterBoulevard
Tukwila, WA 98188
SEBCO.|nc.
4020Ems Madison Street, Suite 32O
Seattle, WA 08112
8. With regard to the matters addressed herein, this agreement constitutes the entire agreement
between the padies, and supersedes all prior discussions, negohatione, and all agreements whatsoever
whether oral or written.
S. This Declaration of Covenant is intended to protect the value and desirability of the real
property described in Exhibit '# and shall inure to the benefit of all of the citizens of the City ufTukwila.
This Declaration of Covenant shall run with the land and be binding upon Grantor and Grantor's
successors ininterest, and assigns.
10. This Declaration of Covenant may be terminated by execution ofowritten agreement by the
Owner and the City of Tukwila that is recorded by King County in its real property records.
IN WITNESS WHEREOF, this Declaration Covenant for the Inspection and Maintenance of
STATE OFVVAGH|NGKJN)
)as.
COUNTY OF KING
4, 4,JS
S.
' ) /
| certify | know orhave satisfactory evidence that, '8 [`) I l(� 'k i :" �Vo" the person who appeared
before me, and said person acknowledged that hesigh� edthieinnu�entonnothabahadthathewma
author�edtmexecute the inntmmentand acknowledge aathe �y|L / /)t -~ ^( of
SEBCO. Inc. a Profit Corporation, to bethe free and voluntary act ofmu prtyfor the ueoe and purposes
mentioned in the instrument.
Dated:
K8MLL)ND
NOTARY PUBL|C#84465
CTATEOFVVASM|NGlON
C0AWSS|ONEXP|RES
SEPTE BER1B`2022
'
18176o15.dnc
^
i
Notary Public inand for the State ofWashington
(�
/ ��
residing at
, � r~ u� -/
| | I__
�fMy appointment expires
rogc 3^0
CITY OFTUKVV| H|NGTON
.PuNic Works Director
Date �/�_\;�
STATE OF WASHINGTON
COUNTY OF KING
On this ' day of �'�t�/�er~ . 2818 before me, the undersigned. a Notary Pub|ic, in and for
the State of Washington, duly commissioned and sworn, personally appeared Henry Haah, Public Works
Dinechzr, and said person acknowledged that he signed this inotrument, on oath stated that he was
authorized to execute the instrument and acknowledged it to be the free and voluntary act of such party for
the uses and purposes mentioned inthe instrument.
/
WITNESS myhand and official seal the day and year first above written,
c
"I";'45
NOTARY
My appointment expires:
PUBLIC in and for the State of Washington,
residing at:
18176.0
15.duo pugc4oN
EXHIBIT "A"
LEGAL DESCRIPTION OF PROPERTY
THAT PORTION OF THE SOUTHWEST QUARTER OF THE SOUTHWEST QUARTER OF SECTION 3;
AND OF GOVERMENT LOT 10 IN SECTION 4, OF TOWNSHIP 23 NORTH, RANGE 4 EAST,
WILLAMETTE MERIDIAN, IN KING COUNTY, WASHINGTON, ALL LYING BETWEEN THE EASTERLY
MARGIN OF STATE ROAD NO. 1 (TUKWILA BOULEVARD, PACIFIC HIGHWAY SOUTH) AS
CONVEYED BY DEEDS RECORDED UNDER RECORDING NOS. 3909047 AND 3909049, AND THE
WESTERLY MARGIN OF EAST MARGINAL WAY SOUTH (STATE HIGHWAY NO. 5-M, DUWAMISH
ROAD) RIGHT OF WAY, AND LYING SOUTHERLY OF A LINE DRAWN PARALLEL WITH AND 389.23
FEET NORTH OF THE SOUTH LINE OF SAID SECTION 4 EXTENDED EAST;
EXCEPT THE SOUTH 60 FEET THEREOF AS CONDEMNED IN KING COUNTY SUPERIOR COURT
CAUSE NO. 121648 BY THE CITY OF SEATTLE FOR PIPELINE RIGHT OF WAY, PURSUANT TO
ORDINANCE NO. 37022; AND
EXCEPT THAT PORTION THEREOF AS CONDEMNED IN KING COUNTY SUPERIOR COURT CAUSE
NO. 469557 BY THE CITY OF SEATTLE FOR TRANSMISSION LINE PURPOSES, PURSUANT TO
ORDINANCE NO. 82986; AND
EXCEPT THAT PORTION THEREOF AS CONVEYED TO KING COUNTY FOR WIDENING SAID EAST
MARGINAL WAY SOUTH UNDER RECORDING NO. 8806090815; AND
EXCEPT THAT PORTION THEREOF LYING BELOW THE 500 FOOT VERTICAL DEPTH LEVEL
BELOW THE SURFACE OF THE PROPERTY, AS RESERVED UNDER RECORDING NO. 6262412.
18176.015.doc Page 5 of 8
Exhibit^B^
StonmvvoburPollution Prevention Plan
for SEBCO'Inc.
Permit no. 9VV16'O18U
Site Address
The site address ia11DGOTukwila International Boulevard, Tukwila, VVA 88188.
Assessor's Tax Parcel (Dno. O423049014
Plan Goal
The goal ofthe plan is to treat all on -site runoff for water quality bydirecting flows k/ashunnfKersfor
PremmntadveBIVIP's
The catch basins shall have stenciled next to them "DUMP NO WASTE -DRAINS TO STREAM". Activity
that involves pollutants shall b*done under mcovered area. The private driveways and parking lot shall
becleaned and swept aonecessary toremove debris.
Inspection
Inspect the donnwaAarayahsm and clean out catch basins at least twice year, especially after periods of
heavy runoff. Maintenance records must be kept for five (5) years and available for City Inspector review.
The stonnfikemshall bemaintained aorecommended bythe manufacturer.
Person of Responsibility
Name:
Address'
Emergency Contact:
Person ufResponsibility, Date:
Engineer Preparing Plan
Name
Address
Plan and/or Information Updates
SEBC8hic.
4D20East Madison Street, Suite 320, Seattle, VkAQ8/Y2
Telephone No 206-323-9507
Jay 8/ao/ngeme'October t2018
Jason Hubbell, P.E.
Baghmus*nConsulting Engineers, Inc
1821572ndAvenue South
Kent, WA 98032
The City of Tukwila, Public Works Dapartmert, Engineering Divisk»n, Storm Drainage Section-, is to review
and approve any changes to this Operations and Maintenance Manual prior to changes in its
implementation. Additionally, any changes in ownership or person of responsibility are to be reported to
INSPECTION / MAINTENANCE CHECKLIST
STRUCTURE
Inspection
Frequency
DATE OFINSPECTION/MAINTENANCE
Results/
Maintenance
Date
COMMENTS
CB#1
2
Inspection
Roeuho
Maintenance
Done
CB#2
S(onnfikorCodch
Basin
1
Inspection
Results
Maintenance
Done
CB#3
ShonnfiKerCatoh
Basin
1
Inspection
Results
Maintenance
Done
CB#S
2
Inspection
Results
Maintenance
Done
West Trench
Drain
2
Inspection
Results
Maintenance
Done
CB#7
Ekorm5berCatch
Basin
1
Inspection
Results
Maintenance
Dune
CB#7A
2
Inspection
Results
Maintenance
Done
C8#8
2
Inspection
Results
Maintenance
Done
East Trench
Drain
2
Inspection
Results
Maintenance
Done
CB#R4
StonnfikerCotch
Basin
1
Inspection
RoauKo
Maintenance
Done
Roof drains and
clean outs
2
Inspection
Results
Maintenance
Done
18176.015.duu
Page 7^|X
Conveyance
Pipes and
Ditches
2
Inspection
Results
Maintenance
Done
Grounds/
Landscaping
3
Inspection
Results
Maintenance
Done
1 Yearly (August or September) and after major storm events per manufacturer's
recommendations
2 Twice year
3 Monthly
18176.015.dvc Page 8o0
ENGINEERED SOLUTIONS
CatchBasin StormFilterTM
Important: These guidelines should be used as a part of your site
storrnwater plan.
Overview
The Catch Basin StorrnFilter-" (CBSF) consists of a multi-chomber
steel, concrete, or plastic catch basin unit that can contain up to
four StormFilter cartridges. The steel CBSF is offered both as a
standard and as o deep unit.
The CBSF is installed flush with the finished grade ond is
applicable for both constrained lot and retrofit applications. It
can also be fitted with an inlet pipe for roof leaders or similar
applications.
The CBSF unit treats peak water quality design flows up to 0.13
cfs, coupled with an internal weir overflow capacity of 1.0 cfs for
the standard unit, and 1.8 cfs for the deep steel and concrete
units. Plastic units have an internal weir overflow capacity of 0.5
cfs.
Design Operation
The CBSF is installed as the primary receiver of runoff, similar
to a standard, grated catch basin. The steel and concrete CBSF
units have an H-20 rated, traffic bearing lid that allows the filter
to be installed in parking lots, and for all practical purposes,
takes up no land area. Plastic units can be used in landscaped
areas and for other non -traffic -bearing applications.
The CBSF consists of a sumped inlet chamber and a cartridge
chamber(s). Runoff enters the surnped inlet chamber either
by sheet flow from a paved surface or from an inlet pipe
discharging directly to the unit vault. The inlet chamber is
equipped with an internal baffle, which traps debris and floating
oil and grease, and an overflow weir. While In the inlet chamber,
heavier solids are allowed to settle into the deep sump, while
lighter solids and soluble pollutants are directed under the baffle
and into the cartridge chamber through a port between the
baffle and the overflow weir.
BAN()
OPERATION AND
MAINTENANCE
Once in the cartridge chamber, polluted water ponds and
percolates horizontally through the media in the filter cartridges.
Treated water collects in the cariridge's center tube from where it
is directed by an under -drain manifold to the outlet pipe on the
downstream side of the overflow weir and discharged.
When flows into the CBSF exceed the water quality design
value, excess water spills over the overflow weir, bypassing the
cartridge bay, and discharges to the outlet pipe.
Applications
The CBSF is particularly useful where small flows are being
treated or for sites that are flat and have little available hydraulic
head to spare. The unit is ideal for (Applications in which
standard catch basins are to be used. Both water quality and
catchment issues can be resolved with the use of the CBSF.
Retro-Fit
The retrofit market has many possible applications for the CBSF.
The CBSF can be installed by replacing on existing catch basin
without having to "chase the grade," thus reducing the high cost
of re piping the storm system.
Page 1
www.ConiechES.com/stormwater
800-338-1122
(.0 2013 Contech Engineered Solutions
CeNTECH
ENGINEERED SOLUTIONS
CatchBasin StormFilterTM
Maintenance Guidelines
Maintenance procedures for typical catch basins con be applied
to the CatchBasin StormFilter (CBSF). The filter cartridges
contained in the CBSF are easily removed and replaced during
maintenance activities according to the following guidelines.
1. Establish a safe vvorking area as per typical catch basin
service activity.
2. Remove steel grate and diamond plate cover (weight 100
lbs. each).
3. Turn cartridge(s) counter -clockwise io disconnect from pipe
manifold.
4. Remove 4" center cap from cartridge and replace with
lifting cap.
5. Remove cartridge(s) from catch basin by hand or with vactor
truck boom.
6. Remove accumulated sediment via vactor truck (min.
clearance 13" x 24").
7. Remove accumulated sediment from cartridge bay. (min.
clearance 9.25" x 11").
8. Rinse interior of both bays and vactor remaining water and
sediment.
9. Install fresh cartriclge(s) threading clockwise to pipe
manifold.
10. Replace cover and grate.
11. Return original cartridges to Contech for cleaning.
Media may be removed from the filter cartridges using the
vactor truck before the cartridges are removed from the catch
basin structure. Empty cartridges can be easily removed from
the catch basin structure by hand. Ernpty cartridges should be
reassembled and returned to Contech as appropriate.
Materials required include a lifting cap, vactor truck and
fresh filter cartridges. Contact Contech for specifications and
availability of the lifting cap. The vactor truck must be equipped
with a hose capable of reaching areas of restricted clearance,
the owner may refresh spent cartridges. Refreshed cartridges are
also available from Contech on an exchange basis. Contact the
maintenance department of Contech at 503-258-3157 for more
information.
Maintenance is estimated at 26 minutes of site time. For units
with more than one cartridge, add approximately 5 minutes for
each additional cartridge. Add travel tirne as requireci.
-21 IL I
fr Corif h
OPERATION AND
MAINTENANCE
Mosquito Abatement
In certain areas of the United States, mosquito abatement is
desirable to reduce the incidence of vectors.
In BMPs with standing water, which could provide mosquito
breeding habitat, certain abatement measures can be taken.
1. Periodic observation of the standing water to determine if
the facility is harboring mosquito larvae.
2. Regular catch basin maintenance.
3. Use of larvicides containing Bacillus thuringiensis israelensis
(BTI). BTI is a bacterium toxic to mosquito and block fly
larvae.
In some cases, the presence of petroleum hydrocarbons may
interrupt the mosquito growth cycle.
Using Larvicides in the CatchBasin StormFilter
Larvicides should be used according io manufacturer's
recommendations.
Two widely available products are Mosquito Dunks and
Summit B,t.i. Briquets. For more information, visit http://www,
summitchemical.com/mosctrl/ci efault.htm.
The larvicide must be in contact with the permanent pool. The
larvicide should also be fastened to the CatchBasin StormFilter
by string or wire to prevent displacement by high flows, A
magnet can be used with a steel catch basin.
For more information on mosquito abatement in stormwater
BMPs, refer to the following: http://www.ucmrpsucdavis.edu/
publications/managingrnosquitoesstormwater8125.pdf
Page 2
www.ContechES.com/stormwaier
800-338-1122
2013 Contech Engineered Solutions
Maintenance Guidelines
The primary purpose of the Stnmrmate,Management
9mnnriher�"i`mfilter and prevent pollutants from entering our
walemmys,Like any effective filtration system, periodically these
pollutants must ieremoved mrestore the 5m,mFi|/,rmits full
efficiency and effectiveness.
Maintenance requirements and frequency are dependent on the
pollutant load characteristics ofeach site. Maintenance activities
may berequired inthe event ofochemical spill o,due m
excessive sediment loading from site erosion o,extreme storms. It
is a good practice to inspect the systern after major storm events.
Maintenance Procedures
Although there are many effective maintenance options, *e
believe the following procedure to be efficient, using common
equipment and existing maintenance protocols. The following
two-step procedure i`,00mmcndpd::
1Inspection
~ |n`pocdoo ufthe vault interior to determine the need for
maintenance.
z.mmintenunoe
^ Cartridge replacement
Sediment removal
Inspection and Maintenance Timing
At least one scheduled inspection should take place per year with
maintenance following a`wananted.
First, voinspection should bedone before the winter season.
During the inspection the need for maintenance should he
determined and, ifdisposal during maintenance will be required,
samples ofthe accumulated sediments and media should br
obtained.
Second, if warranted, amaintenance (replacement of the filter
cartridges and removal cdaccumulated sediments) should he
performed during periods of dry weather.
in addition to these two activities, hbimportant to check
the condition nfthe ImnnRlterunit after major storms for
potential damage caused by high flows and for high sediment
accumulation that may brcaused hylocalized erosion inthe
drainage area. nmay be necessary madjust thein,pccdvn/
maintenance schedule depending onthe actual operating
conditions encountered hythe system. mgeneral, inspection
activities can brconducted atany time, and maintenance should
occur, if warranted, during dryer months in late mmmc,mearly
Maintenance Frequency
The primary factor for determining frequency vfmaintenance for
the Stonnpi|*erissediment loading.
A properly functioning system will remove solids from water by
trapping particulates inthe porous structure n(the filter media
inside the cartridges. The flow through the system will naturally
decrease °, more and more particulates are trapped. FmntuoUy
the flow through the cartridges will telow enough «,require
replacement. |\ may bcpossible mextend the usable span ofthe
cartridges by removing sediment from upstream trapping devices
on o routine as -needed basis, in order to prevent material from
hring re-m,pendodaod discharged to the Sm,mpi|orurntnont
system.
The average maintenance |ifecyc|ei`approximately l'5years.
Site conditions greatly influence maintenance requirements.
Soo'mHhr,unks looted in areas with erosion or active
construction may need »nbpinspected and maintained more
often than those with fully stabilized surface conditions.
Regulatory requirements o,achemical spill can shift maintenance
timing a`well. The maintenance frequency may hradjusted as
additional monitoring information becomes available du,ing the
inspection program, Areas that develop known problems should
he inspected more frequently than areas that demonstrate no
problems, particularly after major storms. Ultimately, inspection
and maintenance activities should h°scheduled based vnthe
historic records and characteristics ofao individual Sto,mR|te,
system or site. it is recommended that the site owner develop
adatabase ^o properly manage Stn,mFi|«`inspection and
maintenance programs..
2
Inspection Procedures
Th,primary goal nfaninspection b»oassess the condition of
the cartridges relative ^othe level ofvisual sediment loading a,
hrelates «, decreased o,onentcapacity. nmay bedesirable m
conduct this inspection during m`turm to observe the relative
flow through the filter cartridges. ifthe submerged cartridges
are severely plugged, then typically large amounts o(sediments
will bepresent and very little flow will h,discharged from the
drainage pipes. |fthis is the case, then maintenance iswarranted
and the cartridges need mbereplaced.
Warning: mthe case ofaspill, the worker should abort
inspection activities until the proper guidance is obtained.
Notify the local hazard control agency and [onterhEngineered
Solutions immediately.
Toconduct aninspection:
Important: Inspection should be performed by person
who is familiar with the operation and configuration vfthe
StormFilter treatment unit.
/ if applicable, set up safety equipment m protect and vvWy
surrounding vehicle and pedestrian traffic.
2 Visually inspect the external condition of the uoitaod take
notes concerning defect*pmblem`.
l Open the access portals tothe vault and allow the system
vent.
4.Without entering the vaull,visually inspect the inside ofthe
unit, arid note accumulations nfliquids and solids.
z eesure »n record the level of sediment build-up on the floor
ofthe vault, iothe fo,ebayand nvtop ofthe cartridges, |f
flow isoccurring, note the flow vfwater per drainage pipe.
Record all observations. Digital pictures are valuable for
historical documentation.
5. Close and fasten the access portals.
/. Remove safety equipment.
G, If appropriate, make notes about the local drainage area
relative mongoing construction, erosion vmb|rm,' or high
loading ofother materials tothe system.
9. Discuss conditions that suggest maintenance and make
decision as to weather or not maintenance i, needed.
Maintenance Decision Tree
The need for maintenance }` typically based on results of the
inspection, The following Maintenance Decision Tree should heused a`
o general guide, (Other factors, such as Regulatory Requirements, may
need mbeconsidered)
1. Sediment loading nnthe vault floaf.
v. |f>4^cJaccumulated sediment, maintenance is
I Sediment loading onlop nfthe cartridge.
aIf > 1/4" of accumulation, maintenance is required,
]. Submerged cartridges.
a If ^4^ 'dstatic water above cartridge bottom for more
than 24 hours after end of rain event maintenance
is required. (Catch basins have standing water in the
cartridge bay.)
4. Plugged media.
a. |fpore space between media granules is absent,
maintenance is required.
5. Bypass condition.
a. If inspection is conducted during anaverage rain fall
event and Stn,mpi|ter remains in bypass condition
(water over the internal outlet baffle wall orsubmerged
cartridges), maintenance is required.
6. Hazardous material release.
a. If hazardous material release (automotive fluids o/ other)
is reported, maintenance is required.
7. Pronounced scum line.
a. |fpronounced scum line (say a //4^thick) ispresent
above top cap, maintenance isrequired,
Maintenance
Depending on the configuration nfthe particular system,
maintenance personnel will h,required menter the vault m
perform the maintenance.
Important: |fvault entry is,e«uimd.OSHA rules for confined
space entry must be followed.
Filter cartridge replacement should occur during dry weather.
|tmay benecessary toplug the filter inlet pipe hbase flows b
occurring.
Replacement cartridges can hedelivered mthe site o/customers
facility. Information concerning how mobtain the replacement
mroidge`isavailable from [nntrch Engineered Solutions.
Wanning� In the case ofa spill, the maintenance personnel
should abort maintenance activities until the proper guidance
isobtained. Notify the local hazard control agency and
[nntech Engineered Solutions immediately.
Tnconduct cartridge replacement and sediment removal
maintenance:
l if applicable, set upsafety equipment to protect maintenance
personnel and pedestrians from site hazards.
z. Visually inspect the external condition ofthe unit and take
notes concerning defects/p,vhbms.
l Open the doors (access pnrta|s)tothe vault and allow the
system to vent.
4. Without entering the vault, give the inside ofthe vnu,
including components, ageneral condition inspection.
5. Make notes about the external and internal condition of
the vault. Give particular attention to recording the level of
sediment budd'upnnthe floor ofthe vault, inthe fn,cboy
and nntop ,dthe internal components.
6. Using appropriate equipment offload the replacement
cartridges (up »nl5Ol|v.each) and set aside.
r. Remove used cartridges from the vault using one ofthe
following methods:
Method 1:
A. This activity will require that maintenance personnel enter
the vault onremove the cartridges from the under drain
manifold and place them under the vault opening for
lifting (removal). Disconnect each filter cartridge from the
uodmdrainconnector byrotating Counterclockwise l/4of
atum. Roll the loose cartridge, on edge, ma convenient
spot beneath the vault access.
Using appropriate hoisting equipment, attach ncable
from the boom, crane, ortripod tnthe loose cartridge.
[ontauConuzh Engineered Solutions for suggested
attachment devices.
B. Remove the used cartridges (up m25mlbn.each) from the
Important: Caremust beused mavoid damaging the
cartridges during removal and installation. The cost of
repairing components damaged during maintenance will he
the responsibility pfthe owner.
C. Set the used cartridge aside orload onto the hauling
D. Continue steps athrough cuntil all cartridges have been
Method 2:
A. This activity will require that maintenance personnel enter
the vault wremove the cartridges from the under drain
manifold and place them under the vault opening for
lifting (removal). Disconnect each filter cartridge from the
underc,vinconnector byrotating counterclockwise l/oof
a mm Roll the loose cartridge, on edge, to a convenient
spot beneath the vault access.
B. Unscrew the cartridge cap.
C, Remove the cartridge hood and float.
D. At location under structure access, tip the cartridge oo its
side.
E. Empty the cartridge onto the vault floor. Reassemble the
empty cartridge.
F Set the empty, used cartridge aside mload onto the
hauling truck.
G Continue steps athrough , until all cartridges have been
removed.
4
8. Remove accumulated sediment from the floor ufthe
vault and from the fo/ebayThis can most effectively bc
accomplished byuse vf" vacuum truck.
9. Once the sediments are removed, assess the condition ofthe
vault and the condition ofthe connectors.
l0.Using the vacuum truck boom, crane, ortripod, lower and
install the new cartridges. Once again, take care not m
damage connections.
I Close and fasten the door.
1ZRemove safety equipment.
llFinally, dispose nfthe accumulated materials inaccordance
with applicable regulations, Make arrangements m return the
used empty cartridges to Contech Engineered Solutions.
Related Maintenance Activities -
Performed on an as -needed basis
sm,mR|te,units are often Just one ofmany structures inamore
comprehensive mnrmmate/d,ainageand treatment system,
In order for maintenance ofthe 5»o,mFi|te/to be successful, it
isimperative that all other components heproperly maintained.
The mam^eoaoce/eyri,nf upstream facilities should be carried
out prior m9n/mFil*rmaintenance activities.
in addition mconsidering upstream facilities, iti`also important
*vcorrect any problems identified in The drainage area. Drainage
area concerns may include: erosion problems, heavy oil loading,
and discharges ofinappropriate materials,
Material Disposal The pzumu|atedsediment found inuo,mwote,treatment
and conveyance systems must hrhandled and disposed of in
accordance with mgu|ato,ypm»vcnb. it is possible for sediments
to contain measurable concentrations ofheavy metals and
organic chemicals (such as podcWoand petroleum products).
Areas with the greatest potential for high pollutant loading
include industrial areas and heavily travredmad.
Sediments and water must hedisposed ofinaccordance with
all applicable waste disposal regulations. When scheduling
maintenance, consideration must bcmade for the disposal of
solid and liquid wastes, This typically requires coordination with
a local |a"dN| for solid waste disposal, For liquid waste disposal
anumber ofoptions are available including nmunicipal vacuum
truck decant facility, |om| waste water treatment plant nron-site
treatment and discharge.
5
Inspection Report
Date: Personnel:
Location: System Size:
System Type: Vault ill Cast -In -Place 1] Linear Catch Basin
Sediment Thickness in Forebay:
Manhole L Other E
Date:
Sediment Depth on Vault Floor:
Structural Damage:
Estimated Flow from Drainage Pipes (if available):
Cartridges Submerged: Yes El No Ell Depth of Standing Water:
StormFilter Maintenance Activities (check off if done and give description)
E
Trash and Debris Removal:
Minor Structural Repairs:
Drainage Area Report
Excessive Oil Loading: Yes E] No Li Source:
Sediment Accumulation on Pavement: Yes 71 No Li Source:
Erosion of Landscaped Areas: Yes LII No LII Source:
Items Needing Further Work:
Owners should contact the local public works department and inquire about how the department disposes of their street waste
residuals.
Other Comments:
Review the condition reports from the previous inspection visits.
StormFilter Maintenance Report
Date:
Location: System Size:
System Type: Vault Cast -In -Place
List Safety Procedures and Equip ent Used:
Linear Catch Basin
Manhole E Other E
System Observations
Months in Service:
Oil in Forebay (if present):
Sediment Depth in Forebay (if present):
Sediment Depth on Vault Floor:
Structural Damage:
Drainage Area Report
Excessive Oil Loading:
Sediment Accumulation on Pavement:
Erosion of Landscaped Areas:
Yes
No
Yes El
Yes
Yes I —
No D Source:
No E Source:
No j Source:
StormFilter Cartridge Replacement Maintenance Activities
Remove Trash and Debris: Yes Ei
Replace Cartridges: Yes El
Sediment Removed: Yes E] No
Quantity of Sediment Removed (estimate?):
Minor Structural Repairs: Yes 11 No
No
No
Details:
Details:
Details:
Details:
Residuals (debris, sediment) Disposal Methods:
Notes:
1=100'
100
' EX. CB
PUBLIC CB
200
MAINTENANCE EXHIBIT
15" SD
a 15" SD CB 43
CB 11 STORM FILTER
So
Zit C1111111"1.--
,' CB /2
STORM FILTER
OIL STOP
VALVE
AREA DRAIN
SDCO
12" SD
B16
SDCO /4
—6" SD
SDCO #'1
EX CB 12" SD
SD SD
12" TRENCH
DRAIN
8" SD
CB #8-\
SDCO 15
12" TRENCH
DRAIN
PROPOSED BUILDING
FF-20.50
SOUTH 112TH STREET
ROOF DRAIN
EX SWALE
;EX CB *,
\-7.4c8
EX CB
EX CB'
,
EX C
EX CB
12" SD
SDCO #6
STORM FIL LH
4