Contech Filterra Guía de solución de problemas

Operation & Maintenance

(OM) Manual v01

Bioretention Systems

ENGINEERED SOLUTIONS

www.ContechES.com/filterra | 800-338-1122

Table of Contents

Overview

•Filterra®GeneralDescription

•Filterra®Schematic

•BasicOperations

•Design

Maintenance

•MaintenanceOverview

»WhyMaintain?

»WhentoMaintain?

•ExclusionofServices

•MaintenanceVisitSummary

•MaintenanceTools,SafetyEquipmentandSupplies

•MaintenanceVisitProcedure

•MaintenanceChecklist

Bioretention Systems

ENGINEERED SOLUTIONS

www.ContechES.com/filterra | 800-338-1122

General Description

ThefollowinggeneralspecificationsdescribethegeneraloperationsandmaintenancerequirementsfortheContech

EngineeredSolutionsLLCstormwaterbioretentionfiltrationsystem,theFilterra®.Thesystemutilizesphysical,chemical

andbiologicalmechanismsofasoil,plantandmicrobecomplextoremovepollutantstypicallyfoundinurbanstormwater

runoff.Thetreatmentsystemisafullyequipped,pre-constructeddrop-inplaceunitdesignedforapplicationsintheurban

landscapetotreatcontaminatedrunoff.

Stormwaterflowsthroughaspeciallydesignedfiltermediamixturecontainedinalandscapedconcretecontainer.The

mixtureimmobilizespollutantswhicharethendecomposed,volatilizedandincorporatedintothebiomassoftheFilterra®

system’smicro/macrofaunaandflora.Stormwaterrunoffflowsthroughthemediaandintoanunderdrainsystematthe

bottomofthecontainer,wherethetreatedwaterisdischarged.HigherflowsbypasstheFilterra®toadownstreaminletor

outfall.Maintenanceisasimple,inexpensiveandsafeoperationthatdoesnotrequireconfinedspaceaccess,pumpingor

vacuumequipmentorspecializedtools.ProperlytrainedlandscapepersonnelcaneffectivelymaintainFilterra®Stormwater

systemsbyfollowinginstructionsinthismanual.

www.ContechES.com/filterra | 800-338-1122

Basic Operations

Filterra®isabioretentionsysteminaconcretebox.

Contaminatedstormwaterrunoffentersthefilterboxthrough

thecurbinletspreadingoverthe3-inchlayerofmulchonthe

surfaceofthefiltermedia.Asthewaterpassesthroughthe

mulchlayer,mostofthelargersedimentparticlesandheavy

metalsareremovedthroughsedimentationandchemical

reactionswiththeorganicmaterialinthemulch.Waterpasses

throughthesoilmediawherethefinerparticlesareremoved

andotherchemicalreactionstakeplacetoimmobilizeand

capturepollutantsinthesoilmedia.Thecleansedwater

passesintoanunderdrainandflowstoapipesystemor

otherappropriatedischargepoint.Oncethepollutantsare

inthesoil,thebacteriabegintobreakdownandmetabolize

thematerialsandtheplantsbegintouptakeandmetabolize

thepollutants.Somepollutantssuchasheavymetals,which

arechemicallyboundtoorganicparticlesinthemulch,are

releasedovertimeastheorganicmatterdecomposesto

releasethemetalstothefeederrootsoftheplantsandthe

cellsofthebacteriainthesoilwheretheyremainandare

recycled.Otherpollutantssuchasphosphorusarechemically

boundtothesoilparticlesandreleasedslowlybacktothe

plantsandbacteriaandusedintheirmetabolicprocesses.

Nitrogengoesthroughaverycomplexvarietyofbiochemical

processeswhereitcanultimatelyendupintheplant/bacteria

biomass,turnedtonitrogengasordissolvesbackintothe

watercolumnasnitratesdependingonsoiltemperature,pH

andtheavailabilityofoxygen.Thepollutantsultimatelyare

retainedinthemulch,soilandbiomasswithsomepassingout

ofthesystemintotheairorbackintothewater.

Design and Installation

Eachprojectpresentsdifferentscopesfortheuseof

Filterra®systems.Toensurethesafeandspecifiedfunction

ofthestormwaterBMP,Contechreviewseachapplication

beforesupply.Informationandhelpmaybeprovidedto

thedesignengineerduringtheplanningprocess.Correct

Filterra®boxsizing(byrainfallregion)isessentialtopredict

pollutantremovalratesforagivenarea.Theengineershall

submitcalculationsforapprovalbythelocaljurisdiction.

Thecontractorisresponsibleforthecorrectinstallationof

Filterraunitsasshowninapprovedplans.Acomprehensive

installationmanualisavailableatwww.conteches.com.

Maintenance

Why Maintain?

Allstormwatertreatmentsystemsrequiremaintenancefor

effectiveoperation.Thisnecessityisoftenincorporatedin

yourproperty’spermittingprocessasalegallybindingBMP

maintenanceagreement.

•Avoidlegalchallengesfromyourjurisdiction’s

maintenanceenforcementprogram.

•ProlongtheexpectedlifespanofyourFilterramedia.

•Avoidmorecostlymediareplacement.

•Helpreducepollutantloadsleavingyourproperty.

SimplemaintenanceoftheFilterra®isrequiredtocontinue

effectivepollutantremovalfromstormwaterrunoffbefore

dischargeintodownstreamwaters.Thisprocedurewillalso

extendthelongevityofthelivingbiofiltersystem.Theunitwill

recycleandaccumulatepollutantswithinthebiomass,but

isalsosubjectedtoothermaterialsenteringthethroat.This

mayincludetrash,siltandleavesetc.whichwillbecontained

withinthevoidbelowthetopgrateandabovethemulch

layer.ToomuchsiltmayinhibittheFilterra’s®flowrate,

whichisthereasonforsitestabilizationbeforeactivation.

Regularreplacementofthemulchstopsaccumulationofsuch

sediment.

When to Maintain?

Contechincludesa1-yearmaintenanceplanwitheach

systempurchase.Annualincludedmaintenanceconsistsofa

maximumoftwo(2)scheduledvisits.Additionalmaintenance

maybenecessarydependingonsedimentandtrashloading

(byOwneroratadditionalcost).Thestartofthemaintenance

planbeginswhenthesystemisactivatedforfulloperation.

Fulloperationisdefinedastheunitinstalled,curbandgutter

andtransitionsinplaceandactivation(bySupplier)when

mulchandplantareaddedandtemporarythroatprotection

removed.

Activationcannotbecarriedoutuntilthesiteisfullystabilized

(fulllandscaping,grasscover,finalpavingandstreetsweeping

completed).Maintenancevisitsarescheduledseasonally;the

springvisitaimstocleanupafterwinterloadsincludingsalts

andsandswhilethefallvisithelpsthesystembyremoving

excessiveleaflitter.

Ithasbeenfoundthatinregionswhichreceivebetween30-50

inchesofannualrainfall,(2)twovisitsaregenerallyrequired;

regionswithlessrainfalloftenonlyrequire(1)onevisitper

annum.Varyinglandusescanaffectmaintenancefrequency;

e.g.somefastfoodrestaurantsrequiremorefrequenttrash

removal.Contributingdrainageareaswhicharesubjecttonew

developmentwhereintherecommendederosionandsediment

controlmeasureshavenotbeenimplementedmayrequire

additionalmaintenancevisits.

Somesitesmaybesubjectedtoextremesedimentortrash

loads,requiringmorefrequentmaintenancevisits.Thisisthe

reasonfordetailednotesofmaintenanceactionsperunit,

helpingtheSupplierandOwnerpredictfuturemaintenance

frequencies,reflectingindividualsiteconditions.

Ownersmustpromptlynotifythe(maintenance)Supplierof

anydamagetotheplant(s),whichconstitute(s)anintegralpart

ofthebioretentiontechnology.Ownersshouldalsoadvise

otherlandscapeormaintenancecontractorstoleaveall

maintenancetotheSupplier(i.e.nopruningorfertilizing).

www.ContechES.com/filterra | 800-338-1122

Exclusion of Services

ItistheresponsibilityoftheownertoprovideadequateirrigationwhennecessarytotheplantoftheFilterra®system.

Cleanupduetomajorcontaminationsuchasoils,chemicals,toxicspills,etc.willresultinadditionalcostsandarenot

coveredundertheSuppliermaintenancecontract.ShouldamajorcontaminationeventoccurtheOwnermustblockoffthe

outletpipeoftheFilterra®(wherethecleanedrunoffdrainsto,suchasdropinlet)andblockoffthethroatoftheFilterra®.

TheSuppliershouldbeinformedimmediately.

Maintenance Visit Summary

Eachmaintenancevisitconsistsofthefollowingsimpletasks(detailedinstructionsbelow).

1.InspectionofFilterra®andsurroundingarea

2.Removaloftreegrateanderosioncontrolstones

3.Removalofdebris,trashandmulch

4.Mulchreplacement

5.Planthealthevaluationandpruningorreplacementasnecessary

6.CleanareaaroundFilterra®

7.Completepaperwork

Maintenance Tools, Safety Equipment and Supplies

Idealtoolsinclude:camera,bucket,shovel,broom,pruners,hoe/rake,andtapemeasure.AppropriatePersonalProtective

Equipment(PPE)shouldbeusedinaccordancewithlocalorcompanyprocedures.Thismayincludeimperviousgloves

wherethetypeoftrashisunknown,highvisibilityclothingandbarricadeswhenworkingincloseproximitytotrafficand

alsosafetyhatsandshoes.AT-Barorcrowbarshouldbeusedformovingthetreegrates(upto170lbsea.).Mostvisits

requireminortrashremovalandafullreplacementofmulch.Seebelowforactualnumberofbaggedmulchthatis

requiredineachunitsize.Mulchshouldbeadoubleshredded,hardwoodvariety;donotusecoloredordyedmulch.Some

visitsmayrequireadditionalFilterra®engineeredsoilmediaavailablefromtheSupplier.

BoxLength BoxWidth FilterSurface

Area(ft²)

Volumeat3”

(ft³)

#of2ft³Mulch

Bags

4 4 16 42

6 4 24 63

8 4 32 8 4

6 6 36 95

8 6 48 12 6

10 660 15 8

12 672 18 9

13 791 23 12

www.ContechES.com/filterra | 800-338-1122

Maintenance Visit Procedure

Keepsufficientdocumentationofmaintenanceactionstopredictlocation

specificmaintenancefrequenciesandneeds.AnexampleMaintenanceReport

isincludedinthismanual.

1. Inspection of Filterra® and surrounding area

•Recordindividualunitbeforemaintenancewithphotograph(numbered).

RecordonMaintenanceReport(seeexampleinthisdocument)the

following:

2. Removal of tree grate and erosion control stones

•RemovecastirongratesforaccessintoFilterra®box.

•Digoutsilt(ifany)andmulchandremovetrash&foreignitems.

3. Removal of debris, trash and mulch

•Afterremovalofmulchanddebris,measuredistancefromthetopof

theFilterra®engineeredmediasoiltothebottomofthetopslab.Ifthis

distanceisgreaterthan12”,addFilterra®media(nottopsoilorother)to

rechargetoa9”distance

RecordonMaintenanceReportthefollowing:

StandingWater yes|no

DamagetoBoxStructure yes|no

DamagetoGrate yes|no

IsBypassClear yes|no

Ifyesansweredtoanyoftheseobservations,record

withclose-upphotograph(numbered).

RecordonMaintenanceReportthefollowing:

Silt/Clay yes|no

Cups/Bags yes|no

Leaves yes|no

#ofBucketsRemoved ________

RecordonMaintenanceReportthefollowing:

DistanceofBottomofTopSlab(inches) ________

#ofBucketsofMediaAdded ________

www.ContechES.com/filterra | 800-338-1122

4. Mulch replacement

•Pleaseseemulchspecifications.

•Adddoubleshreddedmulchevenlyacrosstheentireunittoadepthof3”.

•EnsurecorrectrepositioningoferosioncontrolstonesbytheFilterra®inlet

toallowforentryoftrashduringastormevent.

•ReplaceFilterra®gratescorrectlyusingappropriateliftingormovingtools,

takingcarenottodamagetheplant.

5. Plant health evaluation and pruning or replacement

as necessary

•Examinetheplant’shealthandreplaceifdead.

•Pruneasnecessarytoencouragegrowthinthecorrectdirections

6. Clean area around Filterra®

•Cleanareaaroundunitandremoveallrefusetobedisposedof

appropriately.



7. Complete paperwork

•DeliverMaintenanceReportandphotographstoappropriatelocation

(normallyContechduringmaintenancecontractperiod).

•Somejurisdictionsmayrequiresubmissionofmaintenancereportsin

accordancewithapprovals.ItistheresponsibilityoftheOwnertocomply

withlocalregulations.

RecordonMaintenanceReportthefollowing:

HeightaboveGrate ________________(ft)

WidthatWidestPoint ________________(ft)

Health alive|dead

DamagetoPlant yes|no

PlantReplaced yes|no

www.ContechES.com/filterra | 800-338-1122

Maintenance Checklist

DrainageSystem

Failure Problem ConditionstoCheck ConditionthatShouldExist Actions

Inlet

Excessive

sedimentortrash

accumulation.

Accumulatedsediments

ortrashimpairfreeflow

ofwaterintoFilterra.

Inletshouldbefreeof

obstructionsallowingfree

distributedflowofwater

intoFilterra.

Sedimentsand/ortrash

shouldberemoved.

MulchCover

Trashand

floatabledebris

accumulation.

Excessivetrashand/or

debrisaccumulation.

Minimaltrashorother

debrisonmulchcover.

Trashanddebrisshould

beremovedandmulch

coverrakedlevel.Ensure

barknuggetmulchisnot

used.

MulchCover

“Ponding”of

wateronmulch

cover.

“Ponding”inunitcould

beindicativeofclogging

duetoexcessivefine

sedimentaccumulation

orspillofpetroleumoils.

Stormwatershoulddrain

freelyandevenlythrough

mulchcover.

Recommendcontact

manufacturerand

replacemulchasa

minimum.

Vegetation

Plantsnot

growingorin

poorcondition.

Soil/mulchtoowet,

evidenceofspill.

Incorrectplantselection.

Pestinfestation.

Vandalismtoplants.

Plantsshouldbehealthy

andpestfree.

Contactmanufacturer

foradvice.

Vegetation Plantgrowth

excessive.

Plantsshouldbe

appropriatetothe

speciesandlocationof

Filterra.

Trim/pruneplantsin

accordancewithtypical

landscapingandsafety

needs.

Structure Structurehas

visiblecracks.

Crackswiderthan1/2

inchorevidenceofsoil

particlesenteringthe

structurethroughthe

cracks.

Vaultshouldberepaired.

Maintenance is ideally to be performed twice annually.

ENGINEERED SOLUTIONS

Revised6/22/2015

Tabla de contenidos

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