Presentation on theme: "Asbestos Awareness –Hazards and Regulations"— Presentation transcript:
1 Asbestos Awareness –Hazards and Regulations A summary of the properties and health hazards of asbestos and safety requirements for personnelSeaTac/Kent/Maple Valley Fire Training ConsortiumAugust 2011
2 Topics Covered Properties of asbestos Uses of asbestos Health hazards of asbestosActivities resulting in potential asbestos exposureAsbestos regulationsWhere to get more information and help
3 Asbestos Exposure - General Overview 1.3 million workers are exposed in the U.S. – primarily in the construction industry.Asbestos removal and building renovation & demolition have the greatest exposures.Exposure in general industry:- manufacture of asbestos products- automotive brake and clutch repair- Housekeeping and custodial work
4 Properties of Asbestos Naturally occurring fibrous mineralsGood tensile strengthFlexibleHeat resistantElectrical resistanceGood insulationChemical resistantAsbestos oreAsbestos fibersBecause of these unique properties, asbestos was used extensively in variety of products.
5 Asbestos fibers, high magnification Types of Asbestos- Chrysotile - “White asbestos”- Amosite - “Brown asbestos”- Crocidolite - “Blue asbestos”“Blue Asbestos”-Most commonly used:Asbestos fibers, high magnificationTremolite (sometimes found in vermiculite)ActinoliteAnthophylliteOthers:
6 Vermiculite – some products contained asbestos Vermiculite insulation in attics
7 Uses of Asbestos Pipe insulation Surfacing insulating materials Asbestos has been used for centuries, but greatly increased during and after World War II in ship insulation and the following:Pipe insulationSurfacing insulating materialsReinforcement of materialsFireproofingAcoustic and decorative plasterTextilesAsbestos insulated pipeUse has greatly declined since the late 1970’sAsbestos insulated boiler
8 Examples of Uses of Asbestos Sheet vinyl containing asbestosSprayed-on fireproofing materialThese products may be found in homes and buildings constructed before 1981.Vinyl asbestos flooring
9 Damaged asbestos pipe insulation This damaged pipe insulation is a health hazard to persons working around it, handling it or removing it. Asbestos fibers are visible on the torn edges.
10 Asbestos Mill BoardAsbestos millboard was used in the construction of walls and ceilings, especially around furnaces and wood-burning stoves, where insulation and fire protection was required. Most varieties of asbestos millboard typically contained between 80% and 85% asbestos.
11 Damaged asbestos gasket Asbestos in gaskets and fabricAsbestos gaskets– may be round, flat or impregnated with waterproof sealantAsbestos fabric in HVAC systemDamaged asbestos gasket
12 Asbestos Roofing Material – used from 1920’s to 1970’s
13 Cement-asbestos pipe (Transite) Cement-asbestos pipe, sometimes called Transite, was used underground and above ground in years past and may show up in pipe replacement jobs, building demolition jobs or excavations.
14 Asbestos Ceiling Tile - used until about 1980 Tile close-upUsually white and in 1’ by 1’ or 2’ by 4’ sizes
15 Asbestos shingles and siding Found in older houses – not to be confused with newer asbestos-free cement siding. There is little hazard unless disturbed. The top right hand picture shows a siding replacement job with broken green asbestos shingles which would have released dust and fibers into the air if done incorrectly.Removal done correctly
16 Asbestos “Popcorn” Ceiling Material Popcorn ceilings (also known as acoustic ceilings) were popular in many homes built from the late 1950s through the early 80s.Uncontrolled popcorn ceiling removal jobNot all popcorn ceiling material contained asbestos, but some did. Many types were more easily dislodged than others.damaged ceiling material
17 Asbestos in joint compound and plaster Some joint compound contained up to 5% asbestosSome joint compound contained up to 5% asbestos. Older plasters in lathe and plaster construction also sometimes contained asbestos.Joint compoundPlaster with asbestosSee WRD for guidance on employee exposure to joint compounds
18 Some Asbestos-Containing Materials* Spray-Applied InsulationBlown-in InsulationFireproofing MaterialsTaping Compounds (thermal)Packing Materials (for wall/floor penetrations)High Temperature GasketsLaboratory Hoods/Table TopsLaboratory GlovesFire BlanketsFire CurtainsCement PipesCement WallboardCement SidingAsphalt Floor TileVinyl Floor TileVinyl Sheet FlooringFlooring BackingConstruction Mastics (floor tile, carpet, ceiling tile, etc.)Acoustical PlasterDecorative PlasterTextured Paints/CoatingsCeiling Tiles and Lay-in Panels(This list does not include every product/material that may contain asbestos. It is intended as a general guide to show which types of materials may contain asbestos.)* Source: EPA
20 Some Terms: “ACM” and “PACM” Asbestos Containing MaterialAny material containing more than 1% asbestos by weight.Presumed Asbestos Containing Material- Surfacing materials- Thermal System Insulation- FlooringInstalled prior to 1981Must be handled as ACM unless proved otherwiseMany uses of asbestos have been banned under EPA and Consumer Product Safety Commission regulations. However, some materials where asbestos fibers are generally well bound in the materials were not banned.Previously installed products still pose a hazard to workers. Asbestos fibers can be released during repair work, demolition, and renovation of older buildings and structures containing ACM.
21 Asbestos is an Inhalation Hazard Airborne asbestos fibers inhaled deep into the lung can cause damage.Tiny breathable asbestos fibers are deposited in the alveoli, the ending small air sacs in the lungs.The body’s defense mechanisms cannot break down the fibers.Asbestos fibers cause damage to the lungs.The fibers may also travel to the pleura, the membrane lining the outside of the lungs.PleuraAlveoli
22 Asbestos-related Diseases .AsbestosisMesotheliomaLung CancerOther cancersUsually symptoms take 15 to 30 years or more to develop.Health effects from asbestos exposure may continue to progress even after exposure is stopped.
25 Lung CancerLung cancer causes the largest number of deaths from asbestos exposure. The risk greatly increases in workers who smoke.
26 Other Cancers esophagus larynx oral cavity stomach colon kidney Evidence suggests that ingesting asbestos can also cause cancers in the:esophaguslarynxoral cavitystomachcolonkidneyFibers can enter the mouth and be swallowed. Poor hygiene, leaving food/drinks out in contaminated areas, and carelessness can result in the ingestion of asbestos.
27 Asbestos-related diseases The potential for asbestos related disease depends on:Amount of fibers inhaledLength of exposureWhether exposed worker smokesAge – because of delayed effectsDon’t smoke! An asbestos worker is at much greater risk of developing lung cancer if he/she smokes.
28 How do asbestos fibers get in the air? Physical disturbance of asbestos-containing materials can suspend fibers in the air.Asbestos is most hazardous when it is “FRIABLE”.Friable: can be easily crumbled or crushed by hand, releasing fibers into the airVery small fibers stay in the air for long periodsDamaged or deteriorated ACM increases friabilityPhoto of friable asbestosNon-friable ACM (floor and ceiling tiles, house siding, fire doors, etc.) won’t release fibers unless disturbed or damaged in some way.
29 Asbestos in the Fire Building Almost any material subjected to intense heat will burn away – except for asbestos.To the firefighter working in a structure fire with ACM’s present, this means you are working in a friable asbestos atmosphere.The fibers that have the greatest potential for respiratory damage cannot be seen.The SCBA worn by firefighters will protect them from this exposure.Firefighters need gross decontamination after exiting a fire area and prior to removal of their SCBA face piece.
30 Asbestos in the Fire Building Most filter masks and dust masks will not stop these small fibers.A HEPA filter half-mask may filter some asbestos.Filter masks are not appropriate for asbestos exposure in fire buildings.Protect your respiratory system by wearing your SCBA during the fire and during salvage and overhaul.Respiratory protection – SCBA – must be used during the fire investigation period if the damaged area is suspected to have ACM.
31 Response to Asbestos Abatement Sites A fire response to a building undergoing asbestos abatement creates additional hazards.Exits can be compromised by the “containment.”The negative air machines can draw air to the containment.The containment area is contaminated with asbestos fiber.
32 Response to Asbestos Abatement Sites (Non-fire) An EMS response for a worker in “containment” must be handled as a HazMat call.Entry into the containment requires full protective equipmentThe victim and all response personnel and equipment need to be decontaminated prior to loading and transport.The containment area is contaminated with asbestos fiber.
33 Communication of Hazards Warning Signsfor regulated areasvisible before enteringWarning Labelsattached to all products and their containersAVOID BREATHING AIRBORNE ASBESTOS FIBERSEntrance to regulated area
34 Construction/Maintenance Activities To avoid a situation illustrated in the photo below, the regulations cover any construction or maintenance activity releasing or likely to release asbestos fibers into the air including:renovationremodelingdemolitionasbestos removal and disposalCovers work done in:buildingsstructuresmechanical piping equipment and systemsshipsother facilitiesLoose asbestos debris from demolition project
35 "Good Faith" Inspection/Survey Required for all construction and maintenance in buildings that may contain asbestos:Must be done by an EPA-accredited AHERA building inspectordocumented written reportnot required if assumed and treated as asbestosPossible fines of $250/day if not done or poorly doneBoth building owner and contractor can be cited!
36 Custodial/Light maintenance work Housekeeping and building maintenance activities may expose workers to asbestos fibers if ACM/PACM is disturbed.Damaged asbestos pipe insulationActivities of concern:sweepingvacuumingcleaningchanging lightsMaterials of concern:vinyl asbestos tilepopcorn ceilingexposed pipingexposed fireproofingAsbestos debris on floor
37 Custodial/Light maintenance work Dry dust or sweep surfaces, ceilings, walls, or floorsDisturb ACM when replacing light bulbs, etc.DO NOT:Work practices: Avoid touching or disturbing ceilings, walls, flooring, and other structures covered with asbestos materials.Pin or hang pictures, plants, or objects on walls or from ceilings covered with asbestos materialsSand asbestos floor tiles or backing material
38 Custodial/Light maintenance work Dust with a damp clothDO:Use only a HEPA-filtered vacuum to clean up asbestos debrisWet mop floors
39 DOSH Asbestos Regulations RCW – Asbestos Safety ActWAC Part I-1 Occupational Health-AsbestosWAC Asbestos Certification & TrainingWAC Construction regulations which refer to WAC
40 Environmental Regulations (EPA) AHERA (Asbestos Hazard Emergency Response Act )NESHAPS (National Emission Standards for Hazardous Air Pollutants)State environmental agencies:Washington State Department of EcologyLocal Air Pollution Authorities (SCAPCA)Washington State Department of Health, County Health Departments
41 Further Information DOSH – asbestos webpage OSHA – asbestos webpageEnvironmental Protection Agency – asbestos webpageDepartment of Ecology – asbestos waste webpage
42 DOSH Consultation Services Safety & health program review and worksite evaluationBy employer invitation onlyFreeConfidentialNo citations or penaltiesLetter explains findingsFollow-up all serious hazardsFor assistance, you can call one of our consultants. Click below for local L & I office locations:
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