Post on 12-Feb-2020
General Guidelines AsbestosRemovAlAnddisposAl
GENERAL GUIDELINES ASBESTOSREMOVALANDDISPOSAL
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GENERAL GUIDELINES: ASBESTOS REMOVAL AND DISPOSAL
Table of Contents ExecutiveSummary GlossaryofTerms
1.0 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 WhenShouldTheseGuidelinesBeConsulted? . . . . . . . . . . 8 HealthAndSafetyLegislationForAsbestosintheNWT . . . . 9 EnvironmentalLegislationForAsbestosintheNWT . . . . . . 92.0 InspectionAndDetermination OfThePresenceofAsbestos . . . . . . . . . . . . . . . . . . . . 103.0 PWSAsbestosManagementProgram . . . . . . . . . . . . . . 124.0 ProjectPlanning . . . . . . . . . . . . . . . . . . . . . . . . . . 135.0 InstructionAndTraining . . . . . . . . . . . . . . . . . . . . . 14
6.0 WSCCNotification . . . . . . . . . . . . . . . . . . . . . . . . . 15
7.0 SpecificRequirements . . . . . . . . . . . . . . . . . . . . . . . 16
7.1 IsolationofWorkArea . . . . . . . . . . . . . . . . . . . . . . . 167.2 AirMonitoring . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 7.2.1 BackgroundAirTesting . . . . . . . . . . . . . . . . . . . . . . 18 7.2.1.1 OngoingAirTestingDuringAbatement . . . . . . . . . . . . . 18 7.2.1.2 FinalAirTesting . . . . . . . . . . . . . . . . . . . . . . . . . . 19 7.2.2 FinalAirTesting:ExteriorAreas . . . . . . . . . . . . . . . . . 19 7.2.3 FinalAirTesting:GloveBagProcedure . . . . . . . . . . . . . 19 7.2.3.1 FailureofFinalAirTests . . . . . . . . . . . . . . . . . . . . . . 197.3 PersonalProtectiveEquipment . . . . . . . . . . . . . . . . . . 207.4 PersonalHygiene . . . . . . . . . . . . . . . . . . . . . . . . . . 217.5 WasteDisposal . . . . . . . . . . . . . . . . . . . . . . . . . . . 227.6 Cleanup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
8.0 Class1(LowRisk)AsbestosRemoval TasksAndProceedures . . . . . . . . . . . . . . . . . . . . . . 248.1 Class1–Description . . . . . . . . . . . . . . . . . . . . . . . . 248.2 Class1–Procedures . . . . . . . . . . . . . . . . . . . . . . . . 25
9.0 Class2(ModerateRisk)AsbestosRemoval TasksAndProcedures . . . . . . . . . . . . . . . . . . . . . . . 26
9.1 Class2–Description . . . . . . . . . . . . . . . . . . . . . . . . 269.2 Class2–Procedures . . . . . . . . . . . . . . . . . . . . . . . . 26
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GENERAL GUIDELINES: ASBESTOS REMOVAL AND DISPOSAL
10.0 Class3(HighRisk)AsbestosRemoval TasksandProcedures . . . . . . . . . . . . . . . . . . . . . . . 28 10.1 Class3–Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 10.2 Class3–Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 10.2.1 Class3–Preparation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 10.2.2 AsbestosRemoval(Note:HighRiskRemovalistobe conductedbythirdpartycontractors,notbyPublicWorks andServicesStaff) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 10.2.3 CleanupofRemovalArea . . . . . . . . . . . . . . . . . . . . . . . . . . 34 10.2.4 ClearanceSampling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 10.2.5 Encapsulation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
11.0 RemovalofResilientFloorCoverings . . . . . . . . . . . . . . 36 11.1 GeneralRulesforRemovalofResilientFloorCovering . . . . . 36 11.2 RemovalofFully-AdheredResilientSheetFlooring . . . . . . . . 37 11.3 RemovalofLoose-LayorPeripherally-AdheredResilient SheetFlooring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40 11.4 RemovalofResilientTile . . . . . . . . . . . . . . . . . . . . . . . . . . 41
12.0 RemovalofACMVermiculiteInsulation . . . . . . . . . . . . 43 12.1 WetRemoval(highrisk) . . . . . . . . . . . . . . . . . . . . . . . . . . 43 12.2 VacuumRemoval(highrisk) . . . . . . . . . . . . . . . . . . . . . . . 44
13.0 AsbestosRemovalUnderColdConditions . . . . . . . . . . . 45 13.1 NormalTechniquesthatWillNotWorkUnder ColdConditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45 13.2 WhatWillWorkUnderFreezingConditions . . . . . . . . . . . . 46 13.3 Heating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46 13.4 Heaters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
14.0 Appendices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48 APPENDIX1-ListofProductsThatMayContainAsbestos . 49 APPENDIX2-ContactsList . . . . . . . . . . . . . . . . . . . 50 APPENDIX3-ListofLaboratoriesforSampleAnalysis . . . . 53 APPENDIX4-ContractorNotificationDocument . . . . . . 54 APPENDIX5-EmergencyRepairs,Response&Procedures . 55 APPENDIX6-References . . . . . . . . . . . . . . . . . . . . 56 APPENDIX7-Acknowledgements,Disclaimer . . . . . . . . 57
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GENERAL GUIDELINES: ASBESTOS REMOVAL AND DISPOSAL
Executive SummaryThisdocumentdescribesvarioustypesofasbestos,situationsinwhichasbestosislikelytobeencountered,healthhazards,legislation,andrequirementsforsafeasbestosremoval,includingmonitoring,airtesting,personalhygiene,wastedisposal,andcleanup .
Asbestosisafibrousmineralcommonlyusedasacomponentinmanymaterialsbecauseofitsstrengthandheat-resistantproperties .Itwaswidelyusedinavarietyofbuildingmaterialsuntil1987 .Alltypesofasbestoshavebeenconfirmedtocausecancer .Inhalationofasbestosfibresmayresultinasbestosis,aprogressivefibrosisoflungtissueormesothelioma .Diseasescausedbyasbestosmaynotmanifestthemselvesfor15to50yearsafterexposure .
MostasbestosinCanadaisusedtomanufactureasbestoscementsheeting .Lesseramountsofasbestosareusedforinsulationaroundboilersandpiping .Asbestosreleaseoccurswhenthematerialhasbeendamagedorwhenbuildingsarebeingdemolished .
IntheNWT,theAsbestosSafetyRegulationsestablishesrequirementsforworkingwithasbestos-containingmaterials(ACM) .TheWorker’sSafetyandCompensationCommission(WSCC)hassetexposurelimitsforworkers .PWShascompletedaninventoryofPWSassetscontainingasbestosandhasimplementedanAsbestosManagementProgram,whichdescribesthestepstobetakenwhendealingwithasbestosinabuilding .
ExecutiveSummary
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GENERAL GUIDELINES: ASBESTOS REMOVAL AND DISPOSAL
Specialprecautionsneedtobetakentoensuretheprotectionofbothworkersandbuildingoccupantswhenremovingasbestosfromabuilding .Samplingisrequired,anddependingonthetypeofasbestos,extensivemeasuresforasbestosremovalmayberequired .
Allformsofasbestosshouldbehandledonlybypersonshavingtheappropriatetraining(recognisedbytheauthorityhavingjurisdiction)andwearingtheappropriatePersonalProtectiveEquipment .Workershandlingfriableasbestosmustweardisposablefullbodyprotectionsuitsandrespiratorswiththecorrectfilters,gloves,boots,etc .Adecontaminationunitmayberequiredtoensureanegativepressureintheworkarea .Wettingagentswillbeneededtoensureasbestosreleaseisminimized .
Asbestosmustbedisposedofinaregisteredsecurelandfill,inaccordancewithregulatoryrequirements .
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GENERAL GUIDELINES: ASBESTOS REMOVAL AND DISPOSAL
Amended Water watertowhichawettingagenthasbeenadded
Analysis Contractor contractorqualifiedtotest anddeterminecompositionofsamples
Approved approvedbyanofficerappointed undertheSafety Act
Asbestos anyofthefollowingfibroussilicates:chrysotile, amosite,crocidolite,actinolite,anthophyllite, ortremolite
Asbestos-Containing materialthatcontains1%ormorebyvolumeofMaterial (ACM) mostasbestostypes
Building includesastructure,anditselectrical, plumbing,heatingandairhandlingequipment andrigidductwork
Competent1 . qualified,becauseofknowledge,trainingandexperience,todo assignedworkinawaythatwillensurethehealthandsafetyof people,2 . knowsthedetailsoftheActandtheregulationsthatapplyto theassignedwork,and3 . knowsaboutpotentialoractualdangertohealthorsafety connectedwiththeassignedwork
Class 1 LowriskAsbestosproceduresandminor removaltasksdescribedinSection9 Class 2 MediumriskAsbestosproceduresand removaltasksdescribedinSection10 Class 3 HigherriskAsbestosproceduresand removaltasksdescribedinSection11
Contractor Notification aforminPW&SAsbestosManagementPlan thatverifiesthatacontractorhasbeenmade awareofpossibleACMinthebuilding .
GLOSSARY OF TERMS
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Department theDepartmentofPublicWorksandServices (GNWT)
Fibre meansafibreofasbestosthatismorethanfive micrometersinlengthandthathasalength to-widthratioofnotlessthanthreetooneas viewedinaphase-contrastopticalmicroscopeat fourtofivehundredmagnification
Fibre/cc of air meansfibresofasbestospercubiccentimeter
Friable Material materialthat,whendry,canbeorhasbeen crumbled,powdered,orpulverizedbyhand pressureandisreadilymovedintheair
HEPA Filter aHighEfficiencyParticulateAerosolfilterthatis atleast99 .97percentefficientincollectinga 0 .3micrometeraerosol
NIOSH NationalInstituteofOccupationalSafetyand Health(USA)
Officer meansanoccupationalhealthandsafetyofficer appointedundertheSafety Act
PW&S theDepartmentofPublicWorksandServices, GNWT
Waste Material anyremovedasbestos-containingmaterialnot intendedforreuseandasbestos-contaminated materialthatcannotbecleanedadequatelyfor reuse .Includesdisposableclothingandpersonal protectiveequipment
WSCC theWorkersSafetyandCompensation CommissionoftheNWTandNunavut
Wetting Agent meansanyproductthatwhenaddedtowater willlowerthewaterviscosityandhelpto penetratetheasbestosmaterial .
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1.0 IntroductionTheDepartmentofPublicWorksandServices(PWS)maintainsandoperatesassetsthroughouttheNorthwestTerritoriesfortheGovernmentoftheNorthwestTerritories(GNWT) .PWShaspreparedaninventoryofasbestos-containingmaterials(ACM)andanAsbestosManagementPlanfortheseassets .TheseGuidelinesprovidedirectiontoPWSstafftoensuretheprotectionofbothworkersandbuildingoccupantsaswellascompliancewithregulatoryrequirementsduringprojectsinvolvingACM .ConsultingtheseguidelinesshouldalsohelptocompleteprojectsinvolvingACMasefficientlyaspossible .
Asbestosisafibrousmineralcommonlyusedasacomponentinmanymaterialsbecauseofitsstrengthandheatresistantproperties .Asbestoswaswidelyusedinavarietyofbuildingmaterialsuntil1987 .ItsusewaslimitedacrossCanadaasaresultofhealthconcernsrelatedtoexposuretoasbestos .Inhalationofasbestosfibresmayresultinasbestosis,aprogressivefibrosisoflungtissue .Scartissue(fibrosis)maycontinuetodevelopafterexposurestops .Twoformsofcancer,lungcancerandmesothelioma,mayresultfromexposuretoinhaledasbestosfibres .Theremaybealonglatencyperiod(between15to50years)betweenexposureandthedevelopmentofthesecancers .Aslittleasafewweeksofexposuretohighasbestosfibrelevelsmaybeenoughtocauselungcancer,especiallywiththecrocidoliteandamositeformsofasbestos .
When should these guidelines be consulted?ThepolicyofPWSistomanageACMin-placeuntilremovalbecomespracticalornecessary .RemovalofACMwilloccurinthefollowingcircumstances:
� ACM’shavebecomedamagedtothepointwhereencapsulation(withpaintorotherproductsapprovedbybestpractice)isnotpracticalandbuildingmaintenanceworkersand/orbuildingoccupantsmaybeexposed .
� DuringrenovationsandbeforedemolitionofassetscontainingACMs .� Whenspecificallyrequestedbytheclient .� Whereriskassessmentsorannualinspectionsidentifyahazard .
TheseguidelinesprovideassistancetoPWSassetmanagementandprojectstaffwhenoneormoreoftheabovesituationsarise .TheseRemovalGuidelinesapplytoeveryplacewherethedepartmentismandatedtoprovidemaintenanceorprojectmanagementservices .
1.0INTRODUCTION
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Health and Safety Legislation for Asbestos in the NWTTheAsbestosSafetyRegulations,issuedunderauthorityofSection22oftheNWT Safety Act,establishesrequirementsforworkingwithACMs .TheWorkersSafetyandCompensationCommission(WSCC)addressestrainingandsafety,andenforcestheseregulationsforworkersinvolvedinasbestosprojects .TheWSCChassetexposurelimits,thatdetailhowmuchasbestosapersoncansafelybeexposedto .Theexposurelimitforanytypeofasbestoshasbeensetat0 .1fibre/ccoveran8-hourperiod .TheUnitedStatesOccupationalHealthandSafetyAdministration(OSHA)originallyadoptedthislimitasStandard29CFR1910 .1001 .
Thelimitappliestoeveryone .However,whenanasbestosworkerwearspersonalprotectiveequipmentthatfiltersoutasbestosfibrestheyareabletoworkinareaswhereahigherconcentrationoffibresispresent .
Environmental Legislation for Asbestos in the NWTDisposalofACMsiscontrolledundertheNWTEnvironmentalProtectionAct,thatisadministeredbytheDepartmentofEnvironmentandNaturalResources(ENR)oftheGNWT .ENRhaspreparedthe“GuidelinefortheManagementofWasteAsbestos”toassistpeoplewishingtodisposeofACMsintheNWT .
Key requirements of the ENR Guideline include:A . Theresponsibilityforproperwastemanagementrestswiththe
generatororowner(GNWTDepartment)oftheasbestos .
B . Thetransportationofwasteasbestosrequiresproperclassification,packaging,labelinganddocumentation .
C . Wasteasbestoscanbedisposedofatalocallandfillwithpermissionofthemunicipality(undercertainconditionsonly)orthrougharegisteredwastemanagementcompany .
TheENRGuidelineprovidesmoreinformation .Consultitbeforebeginninganyactivityrequiringtheremoval,transportationanddisposalofwasteACMs .
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2.0 Inspection and Determination of the Presence of AsbestosTheintentoftheACMinventoryforPWScontrolledassetswasprotectionofpeopleintheirday-to-daywork .Renovationanddemolitionmayinvolveareasofthebuildingnotpreviouslyinspected,i .e .,olderflooringundercarpetoraddedunderlay,gyprocwallboardcoveredbypreviousrenovations,andjointcompoundonexistingwallboard .
TheearlyidentificationofACMsisessentialforthesafeandefficientcompletionoftheproject .Accordingly,checkforthepresenceofACMsduringtheearlystagesoftheplanningoftheproject .
� ConsulttheDepartmentalAsbestosInventoryandnotethetype,locationandextentofanydocumentedACMsintheasset .RemembertheDepartmentalAsbestosInventoryonlyincludesACMsthatwerevisibleduringtheinitialsurvey .Amorethoroughinvestigationofallareaspotentiallydisturbedbytheprojectmustbeundertaken .
� Haveatrainedperson(RegionalAsbestosCoordinatororConsultant) surveytheareastobeaffectedbytheprojectforthepresenceofACMs . Remembertolookatallmaterialsthatmaybeaffectedbytheproject, suchasadditionallayersofflooringunderneathacarpet,original wallsandceilingsbehindcurrentwallsandceilings,andunderthe currentsiding(inthesituationwheretheACMhasbeencoveredup) . Documentthetype,locationandextentofthesuspectedACM .
� ObtainasampleofeachtypeofsuspectedACMforlaboratoryanalysis . Samplescanbewettedtominimizeriskoffibrerelease(seeSection 3 .4) .
� Forrigidnon-friablematerialsuchasfloororceilingtile,geta3cmby 3cmpieceofthematerialandplaceitinasealableplasticbag .
� Forfriablematerialsuchasboilerorpipe-elbowinstallation,chipor cutatleasta2cmby2cmsectionofthematerialandplaceina sealableplasticbag .
� Labeleachsamplewiththeassetname,location,typeofmaterialand date .Achainofcustodyformmustbecompletedidentifyingall samples .
� Tagandphotographthelocationwherethesamplewasobtainedsothat furthersamplesmaybeobtainedifnecessaryandtoenabletheextent oftheACMtobedeterminedoncelaboratoryresultshavebeen received .
� Fortheprojectfile,keepaseparaterecordwiththesameinformation .
2.0INSPECTION AND DETERMINATION OF THE PRESENCE OF ASBESTOS
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� Placeallindividuallybaggedsamplesinalargersealablebagforshipment .PlacethesampleswithinapaddedenvelopeorrigidcontainerandshiptoanAnalysisContractor,requestinganalysisforthepresence,concentrationandtypeofasbestosineachsample .Includeacopyofthechainofcustodyform .
� Ifthereisachangeoftextureorcolourinamaterial,takeadditional samplestoreflectthedifferentproducts .Sometimessamplescontain anumberoflayersaspartofamatrix .InformtheAnalysisContractor whichpart(s)ofthematrixyouwantanalyzed .
� RemembertoremovepotentialACMsamplesinawaythatminimizes theriskofexposuretothepersoncollectingthesampleandtobuilding occupants .
� Collectthesampleswhenbuildingoccupantsarenotpresent,e .g ., beforeorafternormalworkinghours .
� Useadequateprotection(e .g .aHEPAfiltermaskandgloves)when collectingsamplesoffriablematerials,pipeelbows,atticinsulation, orboilerinsulation .
� Minimizethereleaseofasbestosfibresduringsamplecollection .Use aHEPAvacuuminconjunctionwithsampling(directingsuctiononto areawhereactivesamplingisoccurringtocapturefibresreleased),or wetthesurfaceoftheACMbeforeobtainingthesampletoreducefibre release .Immediatelytransferthesampletothesamplecontainer .
� Cleanuptheareawherethesamplewasobtainedimmediatelyafter samplecollectiontopreventreleaseofmorefibres .Usewetwipesor aHEPAvacuumforthispurpose,ratherthansweeping(sweepingwill generatedustandfibres) .Useducttapeorsomeothermaterialtoseal disturbedareas .Decontaminatesamplingequipmentandanyparts ofyourbodyexposedtothepotentialACMwiththoroughwashing withwater .
� Theresultsofthelaboratoryanalysisareusuallyavailablewithin5-7 workingdaysafterthelabreceivesthesample .Materialswithless than1%asbestoscontentarenormallyconsiderednon-ACMsunless thetypeofasbestosisaconcern .Usetheinformationfromtheexisting inventoryandthesurveydocumenttodeterminethepresenceand extentofACMsintheasset .GivethisinformationtotheRegional AsbestosCoordinatortoupdatetheAsbestosInventoryandasset emergencyresponseplan .
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3.0 PWS Asbestos Management Program
An“AsbestosManagementPlan”wasdevelopedbyPWS(May2000)andaninventoryofACMwascompletedformostassets .Thisinventoryissummarizedinthedocument“Asbestos Management for GNWT Assets Inspection Report (2001-2002)” .Insomebuildings,warninglabelswereplacedontheACMinserviceareaswherethereisfriableACM .WorkersaccessingtheseareasmustbeinformedofexactlocationsofACM’s,andtrainedonhowtodealwithpotentialasbestosfibrereleaseduetoaccessingorrenovationstotheseareas .Theymustalsobemadeawareofwhotocontactforadditionalinformation,andtrainedinhowtoadequatelyprotectthemselveswhenintheACMarea .PublicareasarenotlabeledunlessthereissignificantpotentialfordamagetoACM’sandthusforthereleaseoffriableasbestos .
TheComputerizedMaintenanceManagementProgramincludesanotationiftheassetcontainshazardousmaterialssuchasACM .AwarningappearsoneveryWorkOrdergeneratedforassetswithhazardousmaterials .
TheTangibleCapitalAssetSystem(TCA),whichisusedtoinventoryGNWTassets,hasaprovisionfordocumentinghazardousmaterialinbuildings .However,notalldepartmentshavefullyenteredthedatafortheirbuildings .
THISMEANSTHATTHEABSENCEOFTHISNOTATIONSHOULDNOTBETAKENASANINDICATIONTHATHAZARDOUSMATERIALISNOTPRESENT .
3.0PWSASBESTOSMANAGEMENT PROGRAM
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4.0 Project Planning
Aswithanyworkprocess,therearesomegeneralrulesforasbestosremovalwork .ThefollowingrulesshallapplytoallACMremoval:
� Whenworkistobeperformedinanoccupiedbuilding,givewrittennotificationtoalloccupants .Provideanopportunitytoraiseandanswerquestionsandconcernsbeforestartingwork .
� Confirmthatallcontractorswithanyinvolvementwiththe buildinghavesignedacopyofthe“Contractor Notification and Acknowledgement of Hazardous Material”document .
� DetermineifthelocallandfillisregisteredwithENRtoreceive asbestos .
� Confirmthattheoperatingauthorityforthelocallandfilliswillingto receivewasteasbestos .
� Isolatetheareawhereremovalworkistobeconductedfromall otherareasbymeansofconstructedseals,andinsomecases,negative airpressure .Awrittendetailedworkplanmustbegeneratedbecause theprocedureusedmustbereviewedandacceptedbytheWSCCprior toimplementation .Aminimumof72hoursnoticepriortostarting workisrequired .
� Ifremovalworkinvolvesanentirefloor,theelevatoranddoorsshould belockedtopreventunauthorizedentry .
� AbsolutelynoSMOKING,EATING,DRINKINGorCHEWINGis allowedinanasbestosworkarea .Signstoindicatethismustbeposted .
� ProvidecopiesofallinformationtotheRegionalAsbestosCoordinator toupdatetheAsbestosInventoryasnecessaryandconveythe informationincludingtheresultsofairmonitoring(ifundertaken) totheDepartmentalAsbestosManagementCoordinator .
4.0PROJECT
PLANNING
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5.0 Instruction and TrainingThedepartmentshallensurethatanypersonworkingonanyremovalprocedurehasbeencertifiedinasbestosabatementthrougharecognizedtrainingcourse .TheProjectOfficerorRegionalAsbestosCoordinatorwillrecordtheName,CertificateIDnumberandCertificateexpirydateofeveryworkeronthepremises .
The training must include:� thehazardsofasbestosexposure,particularlytosmokers;� personalhygieneandworkpractices;� minimizingfibrerelease;� theuse,fitting,cleaninganddisposalofrespiratorsand
protectiveclothing;� responsetoemergencysituations;� followingprescribedproceduresforallACMtasks;� applicableregulations;� exposurelimits;� monitoring;� enclosureconstruction,andglovebagalternatives;� labelingandwastedisposal;and� decontaminationprocedures .
The instruction and training related to respirators addresses:
� thelimitationsoftheequipment;� theinspectionandmaintenanceoftheequipment,particularly
respectingvalvefunctions,strapping,connectionstoairflowsources, andeffectivenessoffilters;
� thefittingoftheequipment,includingfittestingbyqualifiedpersonnel, andregularfitchecksperformedbytheprotecteduser;
� thedisinfectingoftheequipment;� filterchangeschedules .
5.0INSTRUCTION ANDTRAINING
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6.0 WSCC Notification
WSCCmustbenotifiedseventytwo(72)hoursbeforestartinganyprojectinvolvingtheencapsulation,enclosure,andremovalofACM .Dependingonthework,theProjectOfficer,(inthecaseofaproject),orregionalassetmanagement,(inanyothercase)isresponsibletodothisorconfirmitisdone .
IntheeventofanemergencyeventinvolvingACM,worktocontainorstopthereleaseofasbestosfibrescanbeinitiatedwithoutdelayusingacceptableprocedures .However,allreasonableeffortshouldbetakentocontactaWSCCofficerattheearliestopportunity .
ThefollowinginformationshallbesuppliedtotheWSCC,inwriting:
� Thename,addressandtelephonenumberofthepersongivingthenotice .
� Thename,addressandacontacttelephonenumberfortheplacewhere theworkwillbecarriedout .
� Themunicipaladdressorotherdescriptionoftheplacewherethework willbecarriedout .
� Adescriptionofthework(detailedsafeworkprocedures)thatwillbe carriedout .
� Thestartingdateandexpectedenddateofthework .� Thenameandtelephonenumberofthesupervisorinchargeofthe
work .� Thetrainingtheindividualworkersandsupervisorhavecompleted .� Thetotalnumberofemployeesinvolvedintheremovalofasbestos .
Do not commence work until the WSCC has indicated acceptability of the submitted work plan.ItisimportantthatPWSstaffrememberthattheownerofthebuildinghastheultimateresponsibilityfortheasbestosandhowitishandled .Regardlessoftermsandconditionswrittenintoacontract,thebuildingownerandtheiragentwillbeaccountableforanyimproperactions .
6.0WSCC
NOTIFICATION
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7.1 Isolation of Work AreaBeforebeginningtheremovalofACMinanoccupiedworkplaceorawork-areawhereotherprocessesaretakingplace,followtheserules:
� Postsignsindicating“ASBESTOS REMOVAL – NO ADMITTANCE” .� Restrictaccesstotheremovalareatothosepeopledirectlyinvolvedin
theasbestosremovalandsitesupervisors .WhereremovalofACMisperformedinanoccupiedworkplaceorwork-areathatisnotphysicallyseparatefromotherareas,constructatemporaryenclosuretopreventasbestosfibresfromleavingtheremovalarea .Thisenclosureshall:
� Use0 .15millimeters(6mil)polyethylenesheetingforwallsandfloors .� Inheavytrafficorwearareas,installextralayersorutilizereinforced
poly .� Whereneeded,setuptemporaryframingtosupportplasticsheeting .
Whereaglovebagorsimilardevice(manufacturedspecificallyforthepurposeofremovingasbestoswithinasmallconfinedairspace)canbeusedinplaceofaconstructedenclosure,thismaybeacceptabletotheWSCC .Removeallmoveableitemsfromtheworkarea .Foritemsthatcannotbemoved,covertheminpolyethylenesheeting .Tapedorsealtomakeitairtight .Evaluateanychangeofemergencyegressandtakenecessarystepstoensurerequirementsforfirefighting,emergencyexitsandemergencylightingrequirementsaremet .Itshouldbeconsidered,atthispoint,toarrangeasitetourforlocalfirefightingpersonnelsothattheyunderstandandagreewithemergencyaccess/egressprocedures .
7.0SPECIFICREQUIREMENTS
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Ventilation:� Forthedurationofthework,itmaybenecessarytomaintainthearea
withinaconstructedenclosureundernegativepressuretwenty-four hoursperdaywithaminimumof4airchangesperhourorastatic pressureofnegativefive(-5)pascals(-0 .02inchesofwater)relative tothestaticpressureofotherareasandoutsidetheenclosure .
� Exhaustfromtheworkareashouldbetotheoutsidewhenpossible andthroughadualfiltersystemendingwithaHEPAfilter .
� Disconnectallbuildingmechanicalventilationsupplyandexhaust fromtheworkareaorenclosure .Sealtheventswithpolyethylene sheeting .
� Takecarethataircannotescapeatpointsaroundducts,piping, conduitsorotherholesinsidetheenclosure .
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7.2 Air MonitoringTheneedforairmonitoringisrisk-based .Airmonitoringisrequiredduringabatementandatthecompletionofabatement(aftersurfacesaredry)formoderate-riskabatement .Forbothmoderateandhigh-riskabatementsituationsairmonitoringisrequiredbefore,duringandaftertheasbestosremovalproject .Areasbothinsideandoutsidework-siteenclosuremustbesampled .Theresultsofallmonitoringeventsmustbedisclosedtotheabatementworkers .
7.2.1 Background Air TestingBeforetheremovalworkstarts,thedepartmentoragentwillcarryoutbackgroundairtestinginordertoestablishbackgroundlevelsofcontamination .
7.2.1.1 Ongoing Air Testing During AbatementDuringwork,ifairmonitoringshowsanincreaseinairbornefiberconcentrationsoutsidetheenclosurecontainmentsystem,stopworkuntilthesourceofthecontaminationisfoundandfixed .Similarly,anyfibrelevelsmeasuredinsideanenclosureatlevels>½PFofthePPEbeingusedwilltriggercorrectiveactionbytheabatementpersonnel .
Inhigh-riskabatementsituations,insideandoutsideenclosureairtestingwillbeconductedonadailybasis,withresultsavailablewithina24-hourperiod .Thiswillalsoincludeairsamplescollectedfromthecleanroomandworkarea .
Thecontractorshallcleananyareasthathavebeencontaminatedasaresultofthecontractor’swork .The contractor should be required to carry a mandatory insurance provision covering this event.
7.2AIRMONITORING
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7.2.1.2 Final Air Testing
Dofinalairtestingwhen:
� removaliscomplete,andpriortodismantlingofanyenclosurebarriers;� thepolyethylenesheetingnotnecessarytotheintegrityofcontainment
hasbeenremoved;� Allworkhasstopped(includingclean-up),theworkareaiscleanand
dry(usuallyrequiresasettlingtimeof4to12hours),andaccesstothe workareaisrestrictedtomonitoringstaff .Airtestingwillconsistoffilteredairsamplesofsufficientvolumetoyieldamaximumlimitof0 .01fibres/cc .Contractorsshouldexpectatleasta48hourdelayfromthetimethesamplesreachthelaboratorytothetimetheresultsareknown .Forfinalairtestingtakeatleasttwosamplesinsidetheworkareaandtwosamplesoutsidetheworkarea .Atleastoneairsampleshouldbecollectedforevery110squaremetresofsurfaceareaundercontainment .7.2.2 Final Air Testing: Exterior AreasFinalairtestingisnotrequiredforexterior,openworkareas .Instead,thedepartmentwillperformathoroughandmeticulousinspectiontodeterminecontractorcompliance .7.2.3 Final Air Testing: Glove Bag Procedure
Beforefinalairtestingthedepartmentwillvisuallyinspecteachworkareainwhichglovebagremovalhasoccurred .
Testandanalyzeeachworkareausingstaticsamplingprocedures .
Afinalairtestofthegeneralareasofglovebagremovalmaybeperformedatthedepartment’sdiscretion .7.2.3.1 Failure of Final Air Tests
Whentheresultsofthefinalairtestshowvaluesofairborneasbestosinexcessofthefinalairstandard,theContractor(attheirownexpense)mustre-cleanandre-gluetheworkarea .Containmentbarriersarenotremoveduntilairqualityclearanceisobtained .
ThefinalairtestingprocedureshallthenberepeatedatContractor’sexpense .Afterfinalinspectionsandfinalairtestingarecompleteandtheresultsknown,thedepartmentwillreportthetestresultstoWSCCandtheContractor .
7.2.1.2FINAL AIR
TESTING
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7.3 Personal Protective EquipmentPersonalprotectiveequipment(PPE)mustbeprovidedtoallworkers .
ForglovebagremovalorminorworksuchasdebriscleanuporencapsulationofACM:
� Fullbodycovering(withtightsealsatwristsandankles)consistingof approveddisposablecoverallsandcoversforheadsandfootwear .
� ApprovedrespiratorwithrequiredHEPAfilters(100serieswith minimumPFof10) .Useofthisequipmentabsolutelydoesrequire removalofanyfacialhairthatinterfereswiththeseal,andissubjectto afittestprocedure .
� Foot,handandeyeprotectionand(wherenecessary)hardhats .ForwetremovalofACM:
� Fullbodycovering,includingthehead,consistingofapproved disposablecoverallsaswellasfootwear .
� ApprovedrespiratorwithHEPAfilters(minimumPFof50),or suppliedairbreathingapparatus .Useofthisequipmentwillalso requireremovalofanyfacialhairthatinterfereswiththeseal,and issubjecttoafittestprocedure .
� Waterprooffootandhandprotection .� Eyeprotectionand(wherenecessary)hardhats .
7.3PERSONALPROTECTIVEEQUIPMENT
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7.4 Personal Hygiene
Caremustbetakentoensurematerialfromtheworkareaenclosuredoesnotmigratefromtheenclosure .Thefollowingrulesaretobeenforcedtopreventthismigration:
� Facilitiesforwashinghandsandfacewillbemadeavailableandwillbe usedbyeveryemployeewhenleavingtheworkarea .
� Insomecases,afullbodyshowerandchangeofclothingmaybe requiredbeforeleavingtheenclosure .Insuchcases,theenclosure mustconsistofthreeseparaterooms:theworkarea,adirtyroom,and acleanroomconnectedbywashfacilitiestothedirtyroom .
� WherewetACMistoberemoved,streetclothesmustbeleftinthe cleanroomoftheenclosure .
� Allapplicableprotectiveclothingandequipmentshallbewornin theworkarea,footwearistoremainintheworkareauntilworkis completedandfootwearhasbeencleaned .
� Otherthantherespirator,allcontaminatedclothingmustberemoved andbaggedbeforeanyworkerleavestheworkarea .
� Workersmayremovetherespiratoroncethehairandbodyhavebeen thoroughlywettedinapropershower .
� Theshowermustbesuppliedwithhotandcoldrunningwateror temperedwaterbetween40ºCand50ºC .
� Soap,shampooandcleantowelsshallbeprovidedasneeded .� Aftershowering,workersmayproceedtothecleanroomtodressin
streetclothes .Whenaglovebagmethodisusedastheenclosure,workersshallremoveandbagprotectiveclothingbeforeleavingtheworkarea .Oncetheprotectiveclothinghasbeenbaggedtherespiratormayberemoved .Toiletfacilitiesshouldbeprovidedinornearthecleanroomonthedecontaminatedsideoftheenclosure,oroutsidetheenclosure .Decontaminationproceduresarenecessaryforpersonneltoaccesstoiletfacilities .Nosmoking,drinking,eatingorchewingisallowedinsidetheenclosure,orintheimmediatevicinityoutsidetheenclosure .
7.4PERSONAL
HYGIENE
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7.5 Waste DisposalAfterACMshavebeenremoved,propercaremustbeexercisedtoensurenocontaminationoccursinsurroundingareas .
� PlaceACMinpolyethylenebagsorotherapprovedairtightcontainers ofatleast0 .15mm(6mil)thickness .ACMthatcouldpuncturean airtightbagmustbedouble-baggedandthenplacedinanapproved puncture-proofcontainer .Printedasbestoswarninglabelsmustappear ontheoutersurfaceofthecontainer .
� ThecontainermustbewipedorvacuumedwithaHEPAvacuum .� Neverbreakmaterialintosmallerpiecestofitintocontainersunless
thisisperformedundernegativeairconditions,withthecapabilityof applyingamistwhennecessarytoreducefibrelevels .
� Alleffortsshouldbetakentoeliminateorminimizestorage requirements .However,ifnecessary,storeallwastematerialina designatedareawithpostedsignageand/orcautiontape,secure againstaccidentaldamageuntiltransportedtoadisposalsiteinan appropriatelylicensedandenclosedvehicle .
� Dropsheetsandbarriersthataretobediscardedaretobewetted orHEPAvacuumedandfoldedinonthemselves .Treatthemas asbestoscontaminatedmaterial .
� Wastematerials,includingdiscardedpolyethylenesheeting, sealingtape,cleaningmaterials,protectiveclothing,vacuumbags, andothercontaminatedmaterials,aretreatedasanyotherACMfor disposalpurposes .
7.5WASTEDISPOSAL
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7.6 Cleanup
AftertheremovaloftheACM,allsurfacesintheworkareaaretobedustedwithadampclothorvacuumedwithaHEPAvacuum .Afteruse,anycloths,mops,etc .,areconsideredtobeasbestoswaste,anddisposedof .
Compressedairisnottobeusedtocleanuporremoveasbestosdustfromanysurface .
Leavetheworkarea/enclosureintactandundernegativepressureuntilallsprayseal(glue)hasdried(usually4to12hours)followingcompletionofthecleanup .
Workersinvolvedinthecleanupfollowthesamepersonalprotectiveandhygienepracticesasworkersinvolvedinremovalwork .(See7 .3and7 .4)
Beforetheenclosureisdismantled,performairsamplingtoensurethelevelofasbestosfibresdoesnotexceedthelimitdefinedbypre-removalairtestingorbyWSCClimits,whicheverislowest .
Signsarenottoberemoveduntilairsamplesaretestedandprovetobewithintheacceptablelimit .
7.6CLEANUP
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8.1 Class 1 - DescriptionInstallationorremovalofindividuallymanufacturedproductscontainingasbestos,includingproductssuchasvinylfloortiles,acousticdrop-ceilingtiles,gaskets,seals,packing,frictionproducts,orasbestoscementproductssuchascementwallboardwherenojointcompoundwasused .
Cutting,drillingorshapingofaproductmentionedinthepreviousparagraphbytheuseofhandoperatedtools,wherewaterisusedtocontrolfibrerelease .
Applicationoftape,mud,asealant,orothercoveringtopipeorboilerinsulationcontainingasbestos .
Encapsulationofasbestos-containingmaterialinamannerthatdoesnotdisturbtheasbestos .
Cleanupofgeneraldebris,whenwettedorbyHEPAvacuumthatmaycontainACMthathavedetachedfrominstalledlocations .
8.0CLASS 1(LOW RISK)ASBESTOSREMOVALTASKS ANDPROCEDURES
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8.2 Class 1 - ProceduresInstallbarriertapeandwarningsignsinproximitytotheworkarea .
Approvedrespirators(HEPAfiltersandfittestingrequired)andprotectiveclothingsuitableforasbestos(orbetter)aretobemadeavailablefortheuseofemployees .
Do not conduct any dry removal.However,individualmanufacturedpiecesaswellasloosedebriscanbewettedandpickedupbyhandandplacedinto0 .15mm(6mil)polyethylenebags(doublebaggingisrequired)withprintedasbestoswarninglabels .Donotpurposefullybreakpiecesintosmallersizestomakeiteasiertobagortransport .Largerpiecesmayrequirelargerbagsorplasticwrappinginsteadofbagging .Inthisevent,asbestoslabelswillhavetobemanuallyattachedtothewrapping,identifyingitasasbestoswaste .Fordebriscontaining“sharps”,sealitinpuncture-proofcontainers(usuallywoodenboxesorbarrels)inadditiontothepolyethylenebags .
Controlthespreadofasbestosdustfromtheimmediateworkareabymeasuresappropriatetotheworktobedone .Thisincludestheuseofdropsheetsofpolyethyleneorothersuitablematerial,useofwetwipestocollectdust,andtheuseofHEPAvacuumstocollectdust .
Inthecaseofanoperationmentionedinparagraphs8 .1(2),(3)and(4),wettheproduct,unlesswettingcreatesahazardorcausesdamage .Repeatthewettingfrequently(regularintervals)duringtheworkandimmediatelyuponcompletionofthework .
CleanupdustandwastecontainingasbestosandremoveitusingavacuumequippedwithaHEPAfilter,orbydampwipingormopping .
Dropsheetsmustbedisposedofasasbestoswaste .TheyshouldbewetteddownorHEPAvacuumed,rolledinonthemselvesanddoublebaggedforhandlinganddisposal .
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9.1 Class 2 - DescriptionTheremovalofadrop-ceiling,orpartofit,toaccessaworkarea,whereany quantityoffriablematerialcontainingasbestosislikelytobelyingonthesurfaceofthedrop-ceiling .This is typically only where sprayed on material was applied above the ceiling.
Theminorremovalorminordisturbance(lessthan0 .09m²or1ft²ofsurfacearea)offriablematerialcontainingasbestosduringtherepair,alteration,maintenanceordemolitionofallorpartofabuilding,oranymachineryorequipment,orwheretheminorremovalordisturbanceismorethanaClass 1 Task.
Theremovalofpipeinsulationcontainingfriableasbestoswiththehelpofacommercialcontainmentbag(glovebag)inamountsgreaterthanabsolutelynecessarytodoemergencyrepairs .
UseofpowertoolshavingadustcollectiondeviceequippedwithaHEPAfiltertocut,grind,orabradeanACMproduct .
Removalofdrywallwhereasbestosjoint-fillingcompoundshavebeenused .
Clean-upofsmallquantitiesoffriableasbestosdebristhathasdetachedfromwhereitwasapplied .TypicallythiswillbeACMmudfrompipefittings .
Anyoperationnotmentionedinparagraphs(1)to(6)abovethatmaycauseexposureofanemployeetoasbestos,andthatismorethanaClass1 and less than a Class 3 Task.
9.2 Class 2 - ProceduresEstablishbarriersanderectsignagearoundtheworkingarea .
Shutdownallair-handlingsystemsthatenter/leavetheworkingareaandclosepassagedoorstominimizeair-flowthroughouttheworkingarea .
Usewateroramendedwatertocontrolthespreadofasbestosdust,unlesswettingcreatesanelectricalorslippinghazardorcausesdamage .
� ControlallvisibledustusingdropsheetsandHEPAvacuums .� SprayACMthoroughlywithwateroramendedwaterbeforebeginning
removalwork .OnlypersonswearingprotectiveclothingandproperrespiratoryprotectionmayenteraworkareathathasbeendesignatedasClass2Removal:
9.0CLASS 2(MODERATE RISK)ASBESTOSREMOVALTASKS ANDPROCEDURES
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� Everyemployeewhoenterstheworkareaistobeprovidedwith appropriaterespiratoryprotectiveequipmentthathasbeenfittested priortouse .
� RespiratorsaretobeNIOSHapproved,reusable,airpurifyingdust respirators(orbetter),forprotectionagainstasbestos .Filtersshouldbe atleastN/P/R100filters .
� Whennotinuse,reusablerespiratorsaretobemaintainedandstored inacleanandsanitarylocationthatiseasilyaccessible .
� Wherepracticableassigntherespiratortoaworkerfortheirexclusive use .
� Clean,disinfectandinspectrespiratorsaftereachuseandafterevery shiftduringwhichtheyareusedinanongoingprocess .Provideprotectiveclothingtoeveryemployeewhoenterstheworkarea:
� Theprotectiveclothingconsistsofdisposablecoverallsthatarefull bodycoveringandcoversforheadsandfootwear .
� Anyprotectiveclothingmustberepaired(withducttape)orreplacedif torn .
� Decontaminatebywetwipingorbyusingavacuumequippedwitha HEPAfilterbeforeleavingthecontaminatedworkarea;and
� Discardasasbestos-contaminatedmaterialafteruse .Beforestartingworkthatislikelytodisturbfriablematerialcontainingasbestosthatiscrumbled,pulverizedorpowdered,andthatislyingonanysurface,firstwetdownandthencleanupandremovethefriablematerialbydamp-wiping,orbyusingavacuumequippedwithaHEPAfilter .Inthecaseofanoperationmentionedinparagraphs9 .1(2),(3)and(4),wettheproduct,unlesswettingcreatesahazardorcausesdamage .Repeatwettingfrequently(regularintervals)duringtheworkandimmediatelyafteryoufinish .
Cleanupwastecontainingasbestosandplaceintoasuitablylinedcontainerora0 .15millimeter(sixmil)polyethylenebag .Removedustbydamp-moppingorusingavacuumequippedwithaHEPAfilter .Sealwastecontaining“sharps”inpuncture-proofcontainersinadditiontothepolybagorliner .
Dropsheetsaretobediscardedafteruse .Theyarefirsttobevacuumedorsprayeddownwithwater,foldedinwardandthentreatedasACMwastebydoublebagging .
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10.1 Class 3 - DescriptionTheremoval,otherthantheminorremoval(asdescribedaboveinClasses1and2),ofmaterialcontainingasbestosduringtherepair,alteration,maintenanceordemolitionofallorpartofabuilding,oranymachineryorequipment .
Thesprayapplicationofanencapsulantoverfriableasbestosusingalow-pressuresprayer .
TheuseofapowertoolnothavingadustcollectiondeviceequippedwithaHEPAfiltertocut,grindorabradeanACMproduct .
Thecleaningorremovalofair-handlingequipment,includingrigidducting,inabuildingthathassprayed-fireproofingcontainingasbestos .
Anyindoororoutdooroperationinvolvingthedryremovalorstrippingoffriableasbestos-containingmaterials .
Therepair,alterationordemolitionofaboiler,kiln,metallurgicalfurnaceorsimilardeviceorpartthereof,madeinpartofrefractorymaterialscontainingasbestos .
10.2 Class 3 - Procedures
10.2.1 PreparationPostsignsaroundtheremovalareatorestrictaccess .Postenoughsignstowarnofthehazard .Stateinlarge,clearlettersthat:
� ASBESTOSWORKAREA,LUNGCANCERHAZARD .� ACCESSTOTHEWORKAREAISRESTRICTEDTOAUTHORIZED
PERSONSWEARINGPROTECTIVECLOTHINGAND RESPIRATORYPROTECTIVEEQUIPMENT .
� NOEATING/DRINKING/SMOKING/CHEWING .Allemployeesmustwearrespiratoryprotectionon-siteduringthepreparationofworkareasforasbestosremoval,whereanydisturbanceofthematerialmayoccur .
� Therespiratoryprotectionmusthaveaminimumprotectionfactorof 50,andbeapprovedbyNIOSHforprotectionagainstasbestos .
� Theprotectivedevicemustbefittedsothatthereisaneffectiveseal betweentherespiratorandtheemployee’sface .
� Wherepracticable,assignarespiratortoanemployeeforthe employee’sexclusiveuse .
� Whenusingrespirators,followtheproceduresoftheequipment manufacturer .
10.0CLASS 3(HIGH RISK)ASBESTOSREMOVALTASKS ANDPROCEDURES
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Reusablerespiratorsmustbecleaned,disinfectedandinspected:� afteruse;� atleastonceeachshift,whenissuedfortheexclusiveuseofone
employee;� aftereachusewhenusedbymorethanoneemployee .
Whennotinuse,maintainandstorereusablerespiratorsinacleanandsanitarylocation .
Disablethemechanicalventilationsystemservingtheworkareatopreventcontaminationandfibredispersaltootherareas .
� Switchoffthesystemwherepossible .� Sealtheventilationductstoandfromtheworkarea .� Wheretheventilationsystemcannotbeswitchedoff,blankoffthe
mainventilationducttotheareawithrigidimperviousmaterialsuch asmetalorwood .Takeallmoveableequipmentandmaterialfromtheworkarea .Sealwithpolyethylenesheeting,floors,wallsandanyitemsremainingintheroom .
� Repairimmediatelyanydamagetothepolyethylenesheetingthat occursastheworkproceeds .
� Thepolyethylenesheetingshouldhaveaminimumthicknessof 0 .15mm(6mil) .Usedrop-sheetsduringoutdoorremovaloperations .Takeeveryprecautiontoavoidelectricshock .Disconnectelectricpowertopermanentfixtures,exceptthattemporaryconnectionsmaybemadetolighttheworkareaandfortheoperationofasbestos-removalequipment .Inwetremovaloperationstheonlyelectricalequipmentthatcanbeusedis:
� batteryoperated;� doubleinsulated;� bondedtoground,extralowvoltage,notexceeding30voltsand100
volt-amps;� bondedtoground,andequippedwithagroundfaultcircuitinterrupter
oftheClassAtype,thatistestedbeforeeachuse .
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Setupadecontaminationareaadjacenttotheworkarea .Thisstructureshouldbefullyairtestedbeforeusetoensurethatthereisanegativeairflow,bringingoutsideairthroughthesequentialdecontaminationchambersandintotheworkarea .Thedecontaminationstructureconsistsof:
� Entryfromoutsideintoacleanroomsuitableforchangingintoclean protectiveclothing(entry)orstreetclothes(exiting),andforstoring cleanclothingandequipment;
� Entrytoashowerroomfromthecleanroomasdescribedbelow .� Entryfromtheshowerroomintoa“dirty”changingroomsuitablefor
puttingonreusableprotectiveclothingsuchasbootsandworkgloves .Provideanduse“Airlockdoors”betweenthedifferentroomsinthedecontaminationstructureasfollows:
� Theyconsistoflayersofpolyethylenewithatleastathree-footoverlap .� Thesesheetsareweightedatthebottomtokeeptheflapsclosed .� Theyarearrangedinsequence .� Theyareconstructedsoastopreventthespreadofasbestosdust .
The shower room in the decontamination facilityIstobelocatedbetweenthecontaminatedchangeroomandthecleanchangeroom .
Hasanindividualcontrolinsidetheroomtoregulatewaterflow,andifthereishotandcoldwater,individualcontrolsinsidetheroomtoregulatethetemperature .
Mustprovideadequatesuppliesofhotwatertomaintainawatertemperatureofatleast40oCbutnomorethan50oC .
Istobeprovidedwithcleantowels .Towels,onceused,shouldbeleftintheshowerroomplacedintoaplasticcontainerwithalid .
Nocontaminatedclothingwillbepermittedtoberemovedfromthedirtyroomunlessitissealedinasbestosbagsandtreatedasasbestoswaste .Respiratorsshallbedonnedinthecleanroom(uponentry)andshallnotberemoveduntilshoweringintheshowerroom(uponexiting) .
Makesureadequatetoiletfacilitiesexistinthecleanroom(oroutsidetheenclosure),andthatemployeesgothroughtheproperdecontaminationsequencebeforegoingtothetoiletfacilities .
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10.2.2 Class 1 - Asbestos Removal
Establishnegativeairpressureinsidetheworkareabeforeremovinganyasbestos-containingmaterial .Negativepressureshouldbetesteddaily(-5Pa0 .02”) .
InstallHEPAfiltersontheexhaustunit(s)usedtocreatenegativepressure .
Operatethenegativeairunitsona24-hourbasis .
Maintainaminimumoffourairchangesperhourintheremovalarea .
Wherepossible,exhausttheairfromtheworkareatotheoutdoorsortoanareawithimperviousmaterialsuchaswoodormetal .
Maintaintheintegrityoftheenclosureandtheadequacyofthenegativeairpressureby:
� conductingsmoketests;� adailyvisualinspectionoftheenclosure;� Anydeficienciesmustberepairedpriortostartingthedailyworkshift .
Personal Protective Clothing:
� isprovidedbytheemployer,andwornbyeveryemployeewhoenters theworksite;
� consistsoffullbodycovering,includingheadcovering,withsnug fittingcuffsatthewrists,anklesandneck,(disposablecoverallsare stronglyrecommended);
� isreplacedorrepairediftorn;� includessuitablefootwear,thatmustnotbetakenfromtheworksite
unlesscoveredadequatelywhileontheworksite;� isdonnedinthecleanchangingroom,andstreetclothesareleftinthe
cleanchangingroom,preferablyinindividuallockers;� isremovedwhenleavingtheworksiteandisstored,ordiscardedinthe
first(“dirty”)changeroom .
10.2.2ASBESTOSREMOVAL
(NOTE:HIGH RISK
REMOVAL ISTO BE
CONDUCTED BY THIRD PARTY
CONTRACTORS, NOT BY PUBLIC
WORKS ANDGOVERNMENT
SERVICESPERSONAL)
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Personal Respiratory Protection:� consistsofPoweredAirPurifyingRespirators(PAPR)fittedwith
NIOSHapprovedcartridgesforasbestos,orHEPAfilters(N/P/R100);� consistsofaNIOSHapprovedairlinerespiratorforanydryremoval;� iswornbyallemployeesinvolvedin,ormonitoring,theasbestos
strippingorclean-up;� isworninthemannerdescribedinthemanufacturer’sinstructions;� isproperlyfittedonemployees;� filtersarechangedatleastasfrequentlyasthemanufacturer
recommends .Special precautions are taken for employees inside the removal area:
� Eating,drinking,chewingorsmokinginsidethechangeroom,shower room,hallways,storageroom(s)orremovalareaarestrictlyprohibited .
� Completedecontaminationisrequiredpriortoeating,drinking, chewingorsmoking .
� Respiratoryprotectiveequipmentisnotremovedinsidetheasbestos workarea .
� Employeestakecoffeebreaksandhavelunchinanareacompletely separatefromtheasbestosremovalarea .When an area is being stripped:
� Onlyauthorizedpersonnelarepermittedtoenterthearea .� Employwetmethodsinallcasesexceptwhereelectricalconductors
orelectricalequipmentcannotbede-energized .Writtenpermission mustbeobtainedfromaWSCCSafetyOfficerbeforeproceedingwith drystripping .
� Amendedwaterisusedforsoakingasbestos-containingmaterials .� Sprayamendedwaterwithairlesssprayequipment,setatthelowest
operablepressure .� Thoroughlysprayasbestos-containingmaterialwithamendedwater .
Ensurethatthematerialhasbeensaturated,(fallenmaterialshouldbe wetenoughthatwatercaneasilybesqueezedfromitbyhand) .
� Doremovalinsmallsections,i .e .,about30squarefeet .Afterstripping, placeallfallenmaterialina0 .15mm(sixmil)orthickerpolyethylene bag .
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Afterremovalhasbegun,allpersonsleavingtheworkareamustperformpersonaldecontamination:
� DampwipeorHEPAvacuumPPEwhileinworkarea .� Removeworkclothesanddiscardintoasbestosbagsinthe“dirty”
room(theroombetweentheworkareaandtheshowerroom) .� Removerespiratoryprotectionafterthoroughlyshoweringincluding
thewipingoftherespiratorintheshower .Employeesonlyproceedto thecleanchangeroomafterathoroughshowering .
� Wheretheprotectiveclothing(includinghardhats,ifused,andwork boots)willbereused,itisdecontaminatedusingavacuumequipped withaHEPAfilterorbydampwipingbeforeremoving .Theseitems aretobeleftinthe“dirty”room .
� Wheretheprotectiveclothingwillnotbereused,itisdiscardedinthe samewayasasbestos-contaminatedmaterial .NOTE: In the case of serious injury to a person in the work area, and in this case only, decontamination procedures may be waived in the interests of obtaining medical aid.
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10.2.3 Cleanup of Removal AreaFollowingremovalofasbestos,theentirearea,includingthedecontaminationarea,iswetcleanedandvacuumedwithHEPAfilterstoremoveallvisibleresidue .
Theequipmentusedduringtheremovalis:
� wetwiped,� washedandwrappedinpolyethylene,or� placedinplasticbags,and� broomsaresealedinplasticbagsandcleanedlaterordiscardedas
Asbestoswaste .Asealantisthenappliedtotheentireareaandtotheremainingplastic:
� Thesealantissprayed-onusinganairlessspray,thatisusedin accordancewiththemanufacturer’srecommendations .
� Anegativepressureismaintainedinsidetheenclosureduringthis process .Employeesinvolvedinclean-upusepersonalprotectiveequipmentandrespiratoryprotectionsuchasdescribedinparagraph10 .2 .2(PersonalProtectiveClothingandPersonalRespiratoryProtection) .
Employeesinvolvedinthecleanupfollowthesamepersonaldecontaminationprocedureasdescribedinparagraph10 .2 .2(PerformPersonalDecontamination) .
Theshowersaredismantledandremovedlast,inorderthatemployeesengagedintheclean-upprocedurescanusethem .
10.2.3CLEANUP OFREMOVALAREA
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10.2.4 Clearance Sampling
ClearancesamplingiscompulsoryforallClass3projectswheretheprojectsiteistobere-occupied(exceptforoutdooroperations) .
Aguidelinevalueforclearancesamplingis0 .01fibre/cm3 .Itmaybenecessary,atthediscretionofairmonitoringpersonnel,toconductaggressivesampling .Thisrequirestheuseofaportableblowerfantodisturbtheairintheworkareainconjunctionwithairsamplecollection .
10.2.5 Encapsulation
Thepreparationofaworkareaisconductedthesamewayastheremovalofasbestos-containingmaterial(Class3)i .e .,subsection10 .2 .1 .
Personalprotectiveclothingisusedasdescribedinparagraph10 .2 .2(7) .
Personalrespiratoryprotectiveequipmentisusedasdescribedinparagraph10 .2 .2(8) .
Thespecialprecautionsoutlinedinparagraph10 .2 .2(9)aretakenduringtheseprocedures .
Thepersonaldecontaminationproceduresusedareasdescribedinparagraph10 .2 .2(11) .
Encapsulant(eitherthebridgingorthepenetratingtype)isappliedoverthesurfaceoftheasbestos-containingmaterialusingairlesssprayequipmentatlowpressuresetting .
Theclean-upproceduresareasdescribedinsubsection10 .2 .3 .
Donotapplyaliquidsealantorencapsulanttofriablematerialthatcontainsasbestos,ifthefriablematerialhasdeteriorated,orifthereisinsufficientstrengthandadhesiontosupporttheweightofthesealantandthefriablematerials .
10.2.4CLEARANCE
SAMPLING
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11.0 Removal of Resilient Floor CoveringsThisremovalisconsideredtobelow-riskClass1,andwillfollowlowriskprocedures .Vinyl-asbestostileandasphalttilecontainasbestosfibers,asdidsomeasphaltic“cutback”adhesivesandthebackingsofmanysheetvinylflooringsandliningfelts .Thepresenceoftheasbestosintheseproductsisnotreadilyidentifiable .TheUSEnvironmentalProtectionAgency(EPA)andsomeotherregulatoryagenciesrecognizethatthoseproductsarenon-friable(i.e. when dry cannot be crumbled, pulverized or reduced to powder by hand pressure)unlesscertainactivitiesoccur .
Whileresilientfloorcoveringproductsmanufacturedtodaydonotcontainasbestos,theasbestosusedintheolderproductswasencapsulatedinthematrixoftheproduct .
Unlesspositivelycertainthattheproductyouintendtoremoveisanon-asbestos-containingmaterial,youmustassumeitcontainsasbestos .Testingshouldbeconductedifcostsfortestingareconsiderablylessthanremovalcosts .
Numerousproducts,devicesandtechniqueshavebeenrecentlyintroducedorrecommendedfortheremovalofresilientfloorcoveringstructures .Beforeyouallowtheuseofanypracticesfortheremovalofanin-placeresilientfloor-coveringproductthatcontains(orisassumedtocontain)asbestos,youmustdeterminethatthepracticemeetsallapplicableregulationsincludingtheWSCCstandardsforoccupationalexposuretoasbestos .
Youmustalsodeterminethatanymaterialsusedduringtheremovalpracticewillbecompatiblewiththenewfloorcoveringtobeinstalled .
For the purposes of this guideline PWS is assuming that certified abatement personnel are not required for flooring removal providing the guidelines are followed and a trained, experienced supervisor or PWS employee is directly managing the work. The workers should be made knowledgeable by the supervisor.
11.0REMOVALOF RESILIENTFLOORCOVERINGS
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11.1 General Rules for Removal of Resilient Floor Covering
Unlesspositivelycertaintheproductyouintendtoremoveisnotasbestos-containingmaterial,youmustassumeitcontainsasbestosandremoveitaccordingly .Asampleofthematerialcouldbecollectedandtestedifremovalcostsaresignificantlyhigherthantheywouldbewithnoasbestoscontent .
Removalofexistingfloorcoveringshouldbeconsideredthelastalternative .
Neversand,dryscrape,drill,saw,beadblast,ormechanicallychiporpulverizeanyresilientflooring,backing,lining,felt,asphaltic“cutback”adhesive,orotheradhesivetoremovethemfromthefloor .Beawarethatsomemasticgluesmaycontainasbestos,andwillhavetobescrapedoffusingnon-poweredhandtools .
AlwaysuseavacuumequippedwithHEPAfilter,disposabledustbag,andmetalfloorattachment(nobrush) .
Donotdrysweep .
Allsheetfloorremovalsmustbeperformedusingdetergentsolution .
Allfeltscrapingmustbedonewet .
Priortoremoval,alltilemustbewetted(exceptincaseswhereheatwillbeapplied) .
Warning!Electricalshockhazardexists .Useagroundfaultinterrupterforanyelectricalconnectionsofequipmentusedinawetenvironment .
Becareful .Resilientflooringbecomesslipperywhenwetwiththespecifieddetergentsolution .Usecautiontocontainthesolutionintheimmediateworkarea .Standingonanewsheetofplywoodornon-slipsurfacewhileworkingisrecommended .
Materialremovedmustbeplacedinheavy-dutyimpermeablebagsatleast0 .15millimeter(6mil)thickorinaleak-tightcontainer,properlylabeledanddisposedofinanauthorizedlandfill .Sealmaterialcontaining“sharps”intopuncture-proofcontainersinadditiontothepolyseallayer .
11.1GENERAL RULES
FOR REMOVALOF RESILIENT
FLOORCOVERING
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11.2 Removal of Fully-Adhered Resilient Sheet FlooringRemoveallfurnitureandappliancesfromtheworkarea .
Removeanybindingstripsorotherrestrictivemoldingsfromdoorways,walls,etc .
Preparethespecifiedliquiddishwashingdetergentsolution(454cc/16oz .ofspecifiedliquiddishwashingdetergentto4 .54litre/onegallonofwater)andpourintoahandsprayer .
Beforeremovalbegins,vacuumtheentirefloorusingaHEPAvacuumwithametalfloorattachment .
Makeaseriesofparallelslices100mmto200mm(4”to8”)apartthroughthetoplayeroftheflooringandabouthalfwaythroughthebacking,paralleltothewall,fortheentirefloor .
Wearlayerremoval:Oneworkerstartsattheendoftheroomfarthestfromtheentrancedoorandpriesupthecornerofthestrip,separatingthebackingfromthewearlayer .Asthestripisbeingremoved,anotherworkerspraysaconstantmistofthespecifiedliquiddishwashingdetergentsolutionintothedelaminationnippointtominimizeanyairbornedustparticles .Whendoneproperly,thefeltremainingonthefloorandonthebackofthestripwillbethoroughlywet .
� Doonlyone,1metrewide-stripareaatatime .� Standontheremainingfloorcoveringorcleanfloor(totheextent
feasible,minimizestandingonthefelt) .� Theslicedstripsshouldbepeeledfromthebackingbypullingor
rollingaroundacorethatwillcontrolthestrippingangletocreatea uniformtension(someresilientflooringwearlayersmaynotbereadily strippableandmayrequirewet-scraping) .
� Tieortapetheremovedmaterialsecurelyandplaceintheheavy-duty impermeabletrashbagorclosedleak-tightcontainerfordisposal .Removeanddisposeofeachsucceedingstripinthesameway .
� Minimizewalkingontheexposedfelt .� Workerfootwearmustbecleanedorremovedbeforeleavingworkarea .� Closefullbagstightly,andsealsecurelyfordisposal .� Identifywithanappropriatelabelstating:Dispose in an approved
landfill only.
11.2REMOVALOF FULLY-ADHERED RESILIENTSHEETFLOORING
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Occasionally,partsofthetoporinnerlayerwillsticktothebacking .Thiscanoftenbeeliminatedbypeelingintheoppositedirection .Thestiff-bladedscrapermayhelpintheremovalorpeelingoftheselayers .
Wet-scraping residual felt:
� Afterthreestripsofflooringmaterialareremoved,anyresidualfelt mustbewetscraped .Thoroughlywettheresidualfeltwiththespecified liquiddishwashingdetergentsolution .Waitafewminutestoallowthe liquidtosoakintothefelt .
� Standontheremainingfloorcoveringtotheextentfeasible(notthe felt)andusethestiffbladedscrapertoscrapeupthewetfelt .
� Rewetthefeltifthesolutionhasnotcompletelypenetrated,ifdrying occurs,orifdryfeltisexposedduringscraping .Pickupthescrapings whilestillwetastheyareremovedfromthefloorandplaceinaheavy dutyimpermeabletrashbagorleak-tightcontainer .Wet-scrapeallfelt fromthisfloorareabeforeproceedingfurther .
� Whenthisfloorareahasbeencleanedfreeoffelt,vacuumwithaHEPA vacuumcleanerwiththemetalfloorattachment .Positionthevacuum cleanersothatthedischargeairdoesnotblowontheareabeing cleaned .
� Repeattheaboveonthenextseriesofstrips .� Repeatthisoperationuntilthefelthasbeenremovedfromthewhole
floor .Closefullbagstightlyandsealsecurelyfordisposal .Identifywith anappropriatelabelstating:Dispose in an approved landfill only .
� Whentheentirefloorhasbeenremoved,letitdryandvacuumwith aHEPAvacuumcleanerwiththemetalfloorattachment .Positionthe vacuumcleanersothatthedischargeairdoesnotblowonthearea beingcleaned .
� Aftervacuuming,usedHEPAfiltersandcleanerbagsshouldbe removedaccordingtothemanufacturer’sinstructionsandplacedina heavy-dutyimpermeablebagatleast0 .15millimeter(6mil)thickor leak-tightcontainer .Closeandsealthebagsecurelyfordisposal . Identifywithanappropriatelabelstating:Dispose in an approved landfill only .
� Afloorthathasbeenwet-scrapedmustbeallowedtodrybefore installinganynewresilientflooring .CAUTION:Excessivemoisturecancausepermanentdamagetowoodunderlays .Itisthecontractor/worker’sresponsibilitytousethecorrectamountofsolutiontopreventunderlaydamage .
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11.3 Removal of Loose-Lay or Peripherally Adhered Resilient Sheet FlooringWarning:Donotsand,drysweep,dryscrape,drill,saw,beadblast,ormechanicallychiporpulverizeexistingresilientflooring,backing,liningfelt,asphaltic“cutback”adhesive,orotheradhesive .
� Removeallfurnitureandappliancesfromtheworkarea .� Removeanybindingstripsorotherrestrictivemoldingsfrom
doorways,walls,etc .� Preparethespecifiedliquiddishwashingdetergentsolution(1/2litre
ofthespecifiedliquiddishwashingdetergenttofivelitresofwater)and pourintoahandsprayer .
� Beforeremovalbegins,vacuumtheentirefloorusingaHEPAvacuum withametalfloorattachment .
� Ifflooringisloose,startattheendoftheroomfarthestfromthe entrancedoorwayandsliceastrip½metrewideinthelooseflooring . Oneworkerremovestheslicedstripwhileanotherworkerspraysthe specifiedliquiddishwashingdetergentsolutiondirectlyintothe separationnippoint .Minimizestandingontheexposedsubfloor duringtheremovalprocesstotheextentpossible .
� Rollthewetstriptightlyandtieortapesecurelysoitwillnotunroll . Placeitinaheavy-dutyimpermeablebagatleast0 .15millimeter (6mil)thickorinaleak-tightcontainerwithanappropriatelabel stating,forexample“Caution–ContainsAsbestos .AvoidOpening orBreakingContainer .BreathingAsbestosisHazardoustoYour Health .”Closeandsealthetrashbagsorleak-tightcontainersecurely fordisposal .Disposeinanapprovedlandfill .
� CleantheexposedfloorwithaHEPAvacuumcleanerwiththemetal floorattachment .Positionthevacuumcleanersothatthedischargeair doesnotblowontheareabeingcleaned .
� Repeattheabove,slicing,rollinganddisposingofonestripatatime andcleaningthenewlyexposedareaimmediatelyuntiltheentirefloor coveringhasbeenremoved .Letthefloordry,thenvacuumwitha HEPAvacuumcleanerusingametalfloorattachment .
� AftervacuumingtheusedHEPAfiltersandcleanerbagsshouldbe removedaccordingtomanufacturer’sinstructionsandplacedina heavy-dutyimpermeablebagatleast0 .15millimeter(6mil)thickor inaleak-tightcontainerwithanappropriatelabelstating,forexample “Caution–ContainsAsbestos .AvoidOpeningorBreakingContainer . BreathingAsbestosisHazardoustoYourHealth .”Closeandsealthe bagsorleak-tightcontainersecurelyfordisposal .Disposeinan approvedlandfillonly .
11.3REMOVAL OF LOOSE-LAY ORPERIPHERALLY-ADHEREDRESILIENT SHEETFLOORING
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11.4 Removal of Resilient Tile
Removeallfurnitureandappliancesfromtheworkarea .Removeanybindingstripsorotherrestrictivemoldingsfromdoorways,walls,etc .
Beforeremovalbegins,vacuumtheentirefloorusingaHEPAvacuumwithametalfloorattachment .
Floortilesmustbewetted(mistedwithhandsprayer)beforeactualremovalbegins(unlessheatwillbeusedtoremovetiles) .
Thoseareasnormallyexposedtoheavyfoottrafficpatternsusuallyhavetilesadheredthetightest .Instartingthetileremovalprocess,selectthoseareasthatreceivetheleasttraffic .Trytoremoveindividualtilesinonepiecealthoughsomebreakageoftilesisunavoidable .
Starttheremovalbycarefullywedgingascraperintheseamoftwoadjoiningtilesandgraduallyforcingtheedgeofoneofthetilesupandawayfromthefloor .Continuetoforcethebalanceofthetileupbyworkingthescraperbeneaththetileandexertingbothaforwardpressureandatwistingactiononthebladetopromotereleaseofthetilefromtheadhesiveandthefloor .
Afterthetilesareremovedplacethem,withoutfurtherbreakageintosmallerpieces,inaheavy-dutyimpermeablebagatleast0 .15millimeter(6mil)thickoraclosedleak-tightcontainerthatwillbeusedfordisposal .Removedtilescanbeplacedinemptytilecartonsfirstandthenplacedintheheavy-dutyimpermeablebag .Topreventtearingoftheheavy-dutyimpermeablebag,placeonlyonefullcartonofremovedtileinabag .
Withtheremovalofthefirsttile,accessibilityofothertilesisimproved .Forcethescraperundertheexposededgeofanothertile,andcontinuetoexertaprying,twistingforcetothescraperasitismovedunderthetileuntilthetilereleasesfromthefloor .Removeanddisposeofeachtileinthemannerdescribedintheaboveparagraphs .
Minimizewalkingontheexposedadhesivetotheextentpossible .Workerfootwearmustbecleanedorremovedbeforeleavingworkarea .Closefullbagstightlyandsealsecurelyfordisposal .Identifywithanappropriatelabelstating,forexample“Caution–ContainsAsbestos .AvoidOpeningorBreakingContainer .BreathingAsbestosisHazardoustoYourHealth .”Disposeinanapprovedlandfillonly .
11.4REMOVAL OFRESILIENT TILE
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Sometileswillreleasequiteeasilywhileothersrequirevaryingdegreesofforce .CAUTION:Wear safety glasses when using this procedure .Wheretheadhesiveisspreadheavilyorthetileisbondedtightly,itmaybeeasiertoforcethescraperunderthetightlyadheredareasbystrikingthescraperhandlewithahammer,usingblowsofmoderateforcewhilemaintainingthescraperata25°to30°angletothefloor .
Ifyoufindareaswhereeventheabovemethodswillnotremovethetiles,theremovalprocedurecanbesimplifiedbythoroughlyheatingthetileswithahotairgunoraradiantheatsourceuntiltheheatpenetratesthroughthetileandsoftenstheadhesive .
Alternatively,withoutfirstpryingupfloortilesusingascraper,aheatsourcelikeahotairgunorinfraredheatmachinecanbeusedtoapplyheattothefloortileandthenthetilesmayberemovedbyhandorbyusingascraper .(Wetting the tiles is not required for this alternative removal method) .Whenusingthisprocedure,walkingonexposedadhesivemaybeunavoidable .Workerfootwearmustbecleanedorremovedbeforeleavingtheworkarea .
Whenusinganinfraredheatmachine,followmanufacturer’sinstructions .
Aftertilesareremoved,placetheminaheavy-dutyimpermeablebagatleast0 .15millimeter(6mil)thickorotherclosedleak-tightcontainerwithoutfurtherbreakage .Removedtilescanbeplacedinemptytilecartonsfirstandthenplacedintheheavydutyimpermeabletrashbags .Topreventtearingoftheheavy-dutyimpermeabletrashbag,placeonlyonefullcartonofremovedtileinabag .
Closethefullbagsofremovedtiletightlyandsealsecurelyfordisposal .Identifywithanappropriatelabelstating,forexample“Caution–ContainsAsbestos .AvoidOpeningorBreakingContainer .BreathingAsbestosisHazardoustoYourHealth .”Disposeinanapprovedlandfillonly .
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12.0 Removal of ACM Vermiculite Insulation
ThisremovalisconsideredtobeClass3,highrisk .
VermiculitehasbeenusedextensivelyinCanadaasaninsulationproduct .Mostlyinattics,butalsoinwalls .VermiculitehasrecentlybeenidentifiedasaproducttobetestedforpossibleACM .Whenvermiculiteisdisturbed,theasbestos(ifpresent)willbecomeairborneandishazardoustounprotectedpeoplewhocomeincontactwithit .
TherearetwomethodsusedtocontrolthereleaseofACMdustinvermiculite .Thesearewettingagentsandvacuumsystems .
12.1 Wet Removal (high risk)
Whenthewetremovalprocessisused,theworkerrequiresfullprotection .Negativeairconditionsintheremovalareashouldbeappliedtoinsurethattherestofthebuildingisnotaffectedbytheremovalprocedures .Ifaccesstoanatticcannotbefromtheoutsidethenadecontaminationareamustbedevelopedatthebaseoftheatticaccess .Thedecontaminationareawouldalsohavetobeundernegativeairflow,thatshouldbeventedoutsidethebuildingthroughawindow,doororconstructedventhole .ThedecontaminationroomandadjoiningcleanandchangeroomsshallbeconstructedandusedasdescribedintheLevel3removalprocedures .
Usecommonwettingagentsorde-ionizedwatertosoakthevermiculiteinsulation .Itcanthenbemechanicallyremovedusingshovelsortrowels .Placetheinsulationintoaheavy-dutyimpermeablebagatleast0 .15millimeters(6mil)thickorotherclosedleak-tightcontainer .Closefullbagstightlyandsealsecurelyfordisposal .Identifywithanappropriatelabelstating,forexample“Caution–ContainsAsbestos .AvoidOpeningorBreakingContainer .BreathingAsbestosisHazardoustoYourHealth .”Disposeinanapprovedlandfillonly .Oncemostoftheasbestos/vermiculitematerialhasbeenremovedusevacuumswithHEPAfilterstocompletetheremoval .
Followremovalbyapplyingabatementgluethroughalowpressuresprayer .Dofinalairtestingtomakesuretheareaisnowsafe .
12.0REMOVALOF ACM
VERMICULITEINSULATION
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12.2 Vacuum Removal (high risk)
Itmaybemoreappropriatetouseabulkvacuumsysteminareaswhereceilingorbuildingdamagefromwettingagentsisaconcernorincoldweatherconditionswhereaddedwettingagentsintheatticwillcausefrozenandslipperyconditions .
BulkvacuumsystemsmustbeequippedwithaHEPAfilteraswellasamechanismtocapturebulkvermiculite/asbestosmixtures .Standardasbestosvacuumsarenotpracticalastheyhavealimitedcapacityandarenotdesignedtocapturelargevolumesofbulkmaterial .
Inopenemptybuildingssuchaswarehouses,thevacuumconnections,aswellasthenegativeairsystemcanbesetrightonthefloorbeneaththeatticentry .Dustwillbecollectedmostlybythevacuum,andthenegativeairsystemwillcollectresidualairbornedust,aswellasdustthatmightarisewhenchangingvacuumbags .
Whenthebuildingisnotempty,extendvacuumhosesthroughtherooforventilationbaffles .Placethevacuumitselfoutsideorinanoutsideenclosureattachedtoanegativeairsystem .Similarly,anegativeairunit,ifusedoutsidesimultaneously,couldventilateoutsidefromtheatticthroughexistingroof-mountedvents .
Workersinsidetheatticdoingtheremovalworkmustdecontaminatewithinanenclosureconstructedinsidethebuilding .Requirementsforthisareidentifiedearlierinthisdocument .
Finalairtestingshouldbedonetoensurethebuildingissafetouse .
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13.0 Asbestos Removal Under Cold Conditions
WSCCwillnotallowconductingClass3,high-riskabatementundercoldweatherconditions,unlessinanemergency .
Usethesetechniquesinunheatedbuildingswhereheatcannotbesupplied,whenoutsidetemperatureswon’tallowtheuseofnormalencapsulants,tapeadhesives,andpenetrants,sealantsorglues .Coldconditionsrefertoinsideoroutsidetemperaturesbelowzerothatcannotbeeasilyremediedbysupplementalheating .Italsoincludesconditionswhereshippingofabatementproductscannotbedonewithoutfreezing .
Cold weather conditions may make asbestos removal difficult. The option to delay or bring forward the abatement schedule to take advantage of heated buildings or warm temperatures should be considered. If the building is not heated it might also be that it does not have lights or power as well. Portable lighting and power will have to be installed.
The hazards of asbestos particulate in the air supply are just as real under cold conditions as they are in warm conditions.
13.1 Normal Techniques That Will Not Work Under Cold Conditions
� Wetwipingfordecontamination� Useofnormalliquidsincludingpenetrants,encapsulants,soaking
agentsandsprayglues .� Ducttape(doesnotsticktocoldsurfaces) .� Personneldecontaminationshowersandwatersupply .� Transportandstorageofabatementliquidsandtape .� FittingofPersonalProtectiveEquipment,particularlyprotectivesuits
duetotheneedforathicklayerofwarmclothingunderthePPE .� Protective“booties”,(toosmalltogooverinsulatedboots,too
slipperyforsafeuseoverfrozenpaintedorfrozenlinoleum/tilesurfaces) .
� Functionofrespirators(mayfreezeup) .� Vacuumhoses(willfreezeandsplitorsnap) .
Trying to use these items may also present significant fall hazards to workers (iced walking surfaces).
13.0ASBESTOSREMOVAL
UNDER COLDCONDITIONS
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13.2 What Will Work Under Freezing Conditions
� Vacuumsandnegativeairsystems .Hoseswillhavetobemendedwithappropriatetapetosealsplitsastheyoccur .
� Handtools(staplers,hammers,6milpolyethylenesheeting,6milasbestoswastebags,glovebags) .
� Largeasbestossuitsthatcanbewornoverparkas .� Dedicatedinsulatedbootswithgoodanti-slipsoles .� Warmwaterwashfacilitiessetupininsulatedroomssuchasold
walk-incoolers� Specialtapedesignedforcoldweather,supplementedwithwood
stripsandstaplesforsealinghoarding .� Portabletoilets .� Breathingapparatuswithtwofiltercartridgesandtwosealedspares .
13.3 Heating
Ifsupplementalheatcanbesuppliedtoselectareas(andiftheseareasarerequired,accordingtohazardlevelClasses),thepriorityareasshouldinclude:
� Amaskthawingstationinsidetheabatementarea(directheatwillthaw respiratorcartridgesinstantly,whiletheyarebeingworn) .
� Changingrooms .� Showeranddecontaminationarea .� Primeworkingarea .� Identifiedareaforpersonnelrest .� Toiletarea .
Both the access to and egress from the showers must be heated space. Flooring will require mats to avoid ice formation and a fall hazard.
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13.4 Heaters
Portableheatersareahazardtoworkers .Heatersfueledbykerosene,dieselorpropaneshouldbeventedoutsidethebuildingtonotendangerworkerswithexhaustfumes .Inaddition,mostheatersuseblowersystemsthatcouldspreadasbestosfibres .Theheatventsmustblowheatedairintotheenclosurethat,inturn,isunderpropernegativeaircontrol .Thenegativeairunitswillbefilteringandexhaustingheatedair .
Electricheatersrequirealotofpowerandareonlyeffectiveinsmallareas .
Effective fire safety protocols are necessary, as a fire or explosion could injure or trap workers.
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Appendicies
Appendix 1 List of Products that may contain Asbestos
Appendix 2 Contacts List
Appendix 3 List of Laboratories for sample analysis
Appendix 4 Contractor Notification document
Appendix 5 Emergency repairs
Appendix 6 References
Appendix 7 Acknowledgements
14.0APPENDICIES
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Asbestos - Containing Materials
Note:Thefollowinglistdoesnotincludeeveryproduct/materialthatmaycontainasbestos .Itisintendedasageneralguidetoshowwhichtypesofmaterialsmaycontainasbestos .
Appendix 1PRODUCTS
THAT MAYCONTAINASBESTOSSource:
United States Environmental Protection Agency
Acoustical Plaster
Adhesives
Asphalt Floor Tile
Base Flashing
Blown-in Insulation
Boiler Insulation
Breaching Insulation
Caulking/Putties
Ceiling Tiles and Lay-in Panels
Cement Pipes
Cement Siding
Cement Wallboard
Chalkboards
Construction Mastics (floor tile, carpet, ceiling tile, etc.)
Cooling Towers
Decorative Plaster
Ductwork Flexible Fabric Connections
Electric Wiring Insulation
Electrical Cloth
Electrical Panel Partitions
Elevator Brake Shoes
Elevator Equipment Panels
Fire Blankets
Fire Curtains
Fire Door
Fireproofing Materials
Flooring Backing
Heating and Electrical Ducts
High Temperature Gaskets
HVAC Duct Insulation
Joint Compounds
Laboratory Gloves
Laboratory Hoods/Table Tops
Packing Materials (for wall/floor penetrations)
Pipe Insulation (corrugated air-cell, block, etc.)
Roofing Felt
Roofing Shingles
Spackling Compounds
Spray-Applied Insulation
Taping Compounds (thermal)
Textured Paints/Coatings
Thermal Paper Products
Vermiculite Insulation (Zonolite)
Vinyl Floor Tile
Vinyl Sheet Flooring
Vinyl Wall Coverings
Wallboard
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ROOFING & SIDING
WALLS & CEILINGS
Roofing Felts
Roof FeltShingles
RoofingShingles
RoofingTiles
SidingShingles
Clapboards
Flat, BuiltUp Roofs
Roofs
Roofs
Roofs
Siding
Siding
10 - 15 1910 - Present Asphalt Nonfriable
1 1971 - 1974 Asphalt Friable
20 - 32 ? - PresentPortlandCement
Nonfriable
20 - 30 1930 - PresentPortlandCement
Nonfriable
12 - 14 ? - PresentPortlandCement
Nonfriable
12 - 15 1944 - 1945PortlandCement
NonfriableReplacing,Repairing,Demolishing
SprayedCoating
TroweledCoating
AsbestosCement Sheet
Spackle
JointCompound
TexturedPaints
Millboard,Rollboard
VinylWallpaper
InsulationBoard
Ceilings,Walls, andSteelwork
Ceilings,Walls
Near Heat sourcessuch as Fireplaces,Boilers
Walls,Ceilings
Walls,Ceilings
Walls,Ceilings
Walls,CommericalBuildings
Walls
Walls
1 - 95
1 - 95
20 - 50
3 - 5
3 - 5
4 - 15
80 - 85
6 - 8
30
1935 - 1978
1936 - 1978
1930 - Present
1930 - 1978
1945 - 1977
? - 1978
1925 - ?
?
?
Portland Cement,Sodium Silicate,Organic Binders
Portland Cement,Sodium Silicate
Portland Cement
Starch, Casein,Synthetic Resins
Asphalt
Starch, Lime,Clay
Silicates
Friable
Friable
Nonfriable
Friable
Friable
Friable
Friable
Nonfriable
Friable
Water Damage,DeteriorationImpact
Water Damage,DeteriorationImpact
Cutting, Sanding,Scraping
Cutting, Sanding,Scraping
Cutting, Sanding,Scraping
Cutting, Sanding,Scraping
Cutting,Demolition
Removal, Sanding,Dry Scraping,Cutting
Removal, Sanding,Dry Scraping,Cutting
Replacing,Demolishing
Replacing,Repairing,Demolishing
Replacing,Repairing,Demolishing
Replacing,Repairing,Demolishing
Replacing,Repairing,Demolishing
What kinds of building materials may contain asbestos?
Product Location % of Asbestos Dates of Use BinderFriable
NonfriableHow fibers can
be released
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FLOORS
PIPES & BOILERS
Vinyl -Asbestos Tile
Asphalt -Asbestos Tile
Resilient Sheet Flooring
MasticAshesives
Cement Pipeand Fittings
BlockInsulation
Floors
Floors
Floors
Sheet Flooringand Tile Backing
Water andSewer Mains
Boilers
21 1950 - 1980?Poly (vinyl) -Chloride
Nonfriable
26 - 33 1920 - 1980? Asphalt Nonfriable
30 1950 - 1980? Dry Oils Nonfriable
5 - 25
20 - ?
6 - 15
1945 - 1980?
1935 - Present
1890 - 1978
Asphalt
Portland Cement
MagnesiumCarbonate,Calcuim Silicate
Friable
Nonfriable
Friable
PreformedPipe Wrap
CorrugatedAsbestosPaper
Paper Tape
Putty(mudding)
Pipes
Pipes, High Temp.Moderate Temp.
Furnaces, Steam Valves, Flanges, Electrical Wiring
PlumbingJoints
50
9035 - 70
80
20 - 100
1926 - 1975
1935 - 1980?1910 - 1980?
1901 - 1980?
1900 - 1973
MagnesiumCarbonate,Calcuim Silicate
Sodium Silicate,Starch
Polymers,Starches, Silicates
Clay
Friable
Friable
Friable
Friable
Damage,Cutting,Deterioration
Damage,Cutting,Deterioration
Tearing,Deterioration
Water Damage,Cutting,Deterioration
Removal, Sanding,Dry Scraping,Cutting
Removal, Sanding,Dry Scraping,Cutting
Removal, Sanding,Dry Scraping,Cutting
Removal, Sanding,Dry Scraping,Cutting
Demolition,Cutting,Removing
Damage,Cutting,Deterioration
Source: United States Environmental Protection Agency.
Product Location % of Asbestos BinderFriable
NonfriableHow fibers can
be releasedDates of Use
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Safety
WorkersSafetyandCompensationCommissionoftheNorthwestTerritories
SeniorSafetyOfficer Telephone: 867-669-4403
TollFree: 800-661-0792
Fax: 867-873-4596
TollFreeFax: 866-277-3677
Transportation and Disposal
EnvironmentandNaturalResources,EnvironmentalProtectionService
HazardousSubstancesSpecialist Telephone: 867-873-7645
Fax: 867-873-0221
Public Works and Services
DepartmentalAsbestosCoordinator Telephone: 867-920-8835
867-920-8088
Fax: 867-873-0226
FortSmithRegionalSuperintendent Telephone: 867-872-7401
Fax: 867-872-2830
InuvikRegionalSuperintendent Telephone: 867-777-7140
Fax: 867-777-3463
NorthSlaveRegionalSuperintendent Telephone: 867-873-7650
Fax: 867-873-0257
FtSimpsonAreaDirector Telephone: 867-920-3447
Fax: 867-873-0100
Appendix 2CONTACTSLIST
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Appendix 3 - Laboratories
PHH ARC ENVIRONMENTAL Tel: 780-425-6600 Ext 241 200, 9707 – 110 STREET EDMONTON, AB T5K 2L9 email scoen@phharcenv.com
ENVIROWORKS Tel: 780-457-4652 1224 KLARVATTEN COURT EDMONTON, AB T5Z 3N4
ENVIROTEST LABORATORIES Tel: 780-413-5227 9936-67th AVENUE 800-668-9878 EDMONTON, AB T6E 0P5
PSC ANALYTICAL Tel: 780-465-1212 4619-42nd AVENUE 800-668-9878 EDMONTON, AB T6E 5R2
Appendix 3LABORATORIES
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CONTRACTOR NOTIFICATION AND ACKNOWLEDGEMENTOF HAZARDOUS MATERIALS
I hereby acknowledge that I have been notified of and am aware that the GNWT Asset buildings on the attached list contains Hazardous Material, specifically:
Located in Room(s) and/or Area(s) of the Asset:
and that proper procedures must be followed while working with this material or in these buildings. Specialized safety equipment and training of workers may be required depending on the scope of work identified.
Date: Contract #:
Contractor Signature: Title:
PW&S Signature: Title:
Appendix 4CONTRACTORNOTIFICATIONDOCUMENT
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Appendix 5EMERGENCY
REPAIRS
Emergency Response and Repair ProceduresAsbestosemergencysituationsmayoccuratanytimeduetowaterdamage,physicaldamage,oranyotherdamagewhichmightcausethereleaseofasbestosfibresintheairandcouldposeahazardtohumanhealthandtheenvironment .Anydamagetoasbestosmaterialsrequiresspecialattention,andcertainemergencyproceduresmustbefollowedatsuchtimes .Thefollowingarelistsofprocedurestobefollowedbythebuildingoccupants,employees,theMaintenanceCoordinatorandtheRegionalAsbestosCoordinator,inanasbestosemergencyevent .
DamagetoknownACM(asbestoscontainingmaterials),wherethepossibilityexiststhatareleaseofairbornefibrecouldoccurorhaveoccurred,aretobemanagedbyhavingbuildingoccupants:
A. Immediately stop all activities that may further disturb the damaged material.
B. Vacate the affected area.
C. Isolate the affected area the best possible way through restricting access into and out of the affected area, and closing doors. This can be done by locking doors and posting signs or by stationing monitors to prevent access.
D. Notifying the Program Manager, PWS Facility Manager Maintenance Coordinator and other affected or applicable departmental building management.
PWSstaff(wearingappropriatePersonalProtectiveEquipment)willcontainthedamageandfibrereleaseby:
A. Turning off ventilation equipment or other wise restrict air flow in the affected area. Even with equipment turned off air grills and louvers are to be sealed to prevent fibre migration into the ventilation system.
B. Coordinating immediate access to responding abatement staff, consultants or contractors.
C. Expanding the control area if necessary.
D. Notifying WSCC of the damage and steps being taken.
E. Having trained asbestos worker(s), under the guidance and coordination of the Regional Asbestos Coordinator, clean up the affected area and make any necessary repairs. When possible, repairs are to be done when the building is not occupied.
F. Conduct air sampling including clearance sampling.
Whereminordamagehasoccurredbutfibrereleaseisnotevidentstepsshouldbetakentopreventfurtherdamage .ForexamplewheresmallbumpshaveresultedindentsorcrackingofwallboardandACMisknowntoexistinthedrywallcompound,immediatestepsshouldbetakentoensurenofurtherdamageoccurs .
This can be as simple as ensuring persons cannot be in contact with the affected material.
PWS will send trained workers (wearing personal protective equipment) to perform temporary repairs or install temporary containment material.
Proper repairs will be performed while the building is not occupied. Bulk samples will be taken for analysis.
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ReferencesCONSOLIDATIONofASBESTOSSAFETYREGULATIONS
Availableonlineat:http://www .justice .gov .nt .ca/PDF/REGS/SAFETY/Asbestos-Safety .pdf
GUIDELINEFORTHEMANAGEMENTOFWASTEASBESTOS
Availableonlineat:http:www .enr .gov .nt .ca/library/pdf/eps/asbestos2 .pdf
ASBESTOSMANAGEMENTPLANFORGNWTBUILDINGS(OperatedandMaintainedbyPWS) .PreparedbyTechnicalSupportServices,AssetManagementDivision,PWSinconsultationwiththeWorkers’CompensationBoard .May10,2000
ASBESTOSMANAGEMENTFORGNWTASSETS(MaintainedbyPWS),INSPECTIONREPORT2001-2002,PreparedbyTechnicalSupportServices,AssetManagementDivision,PWS,August2002 .
Appendix 6
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AcknowledgementsInformationinthisdocumentcamefromnumeroussources .
OurAppreciationto:
ProvinceofNewBrunswick,
TheResilientFlooringCoveringInstituteand
ArcticEnvironmentalServicesLtd .
AndaspecialthankstoWSCCfortheirassistanceandcooperation .
TheseguidelinesareintendedtoprovideassistancetotheDepartmentofPublicWorksandServicesandprojectstaffwhilecompletingprojectsinvolvingasbestoscontainingmaterial,toensuretheprotectionofbothworkersandbuildingoccupants,aswellastocomplywithregulatoryrequirements .
DisclaimerThematerialpresentedinthisdocumenthasbeenpreparedinaccordancewithgenerallyrecognizedengineeringprinciplesandpractices,andisforgeneralinformationonly .Thisinformationshouldnotbeusedwithoutfirstsecuringcompetentadvicewithrespecttoitssuitabilityforanygeneralorspecificapplication .
NeithertheGNWT,noranyemployeethereof,shallunderanycircumstanceswhatsoeverbeunderanyliabilitywhatsoevertoanypersonforanyloss,damageorexpensesofwhatevernatureorkindarisingorresultingdirectlyorindirectly,whetherincontractorintort,fromrelianceontheaccuracyorcompletenessoftheinformationcontainedinthisdocument .
Appendix 7
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