Presentation on theme: "Asbestos Awareness Developed by:"— Presentation transcript:
1Asbestos Awareness Developed by: State Safety and Industrial Hygiene UnitDepartment of Employee RelationsSeptember 2000
2Asbestos Awareness Purpose of training: Provide all employees with basic information about asbestos and its hazards,Identify typical asbestos-containing materials within employee work areas,This training does not qualify employees to work with asbestos-containing materialsClickPurpose of Training:Provide all employees with basic information about asbestos and its hazards,This asbestos awareness training is required for employees who work in buildings where asbestos-containing building materials are present.Identify typical asbestos-containing materials within employee work areas,As part of today's discussion we will be discussing which building materials in our building contain asbestos.This training does not qualify employees to work with asbestos-containing materialsMore extensive training requiring hours is necessary to perform the repair, removal, or sampling of asbestos-containing building materials.
3Asbestos Awareness What is Asbestos???? Naturally occurring fibrous mineralSix different forms of asbestosChrysotile - most common type in US (95%)Amosite - 2nd most common (2-3%)Crocidolite - 3rd most common (1-2%)ActinoliteAnthophylliteTremoliteClickWhat is Asbestos????naturally occurring fibrous mineralsix different forms of asbestosYou need to be able to recognize the different technical terms for asbestos since they are frequently used in asbestos building surveys to report asbestos content. The six different types are:chrysotile - most common type in US (95%)amosite - 2nd most common (2-3%)crocidolite - 3rd most common (1-2%)actinoliteanthophyllitetremolite
4Asbestos Awareness Where does asbestos come from??? Mined from the groundContaminant with other minerals (vermiculite)physical properties ideal for buildingmaterialsClickWhere does asbestos come from???Does anyone know where we get asbestos from?mined for the groundMajor deposits of asbestos exist and are actively mined in Canada, the former Soviet Union, and South Africa. Asbestos deposits exist within the United States but have not been extensively mined.Why do we use asbestos???physical properties ideal for building materialsAsbestos has several physical properties which we will discuss in a minute that make it desirable as an additive to building materials.Why do we use asbestos???
5Asbestos Awareness What makes asbestos unique? Abundant Cheap Fibers cleave into smaller fibersWhat makes asbestos dangerous?Extremely small fibers are very aerodynamic(Fibers can remain airborne for extended periods of time and inhaled into the deep lung)ClickWhat makes asbestos unique?abundantcheapfibers cleave into smaller fibersAsbestos fibers can be processed from large visible fibers which are extracted from the bedrock and woven into cloth down to small microscopic fibers added to products as a binder to strengthen the finished product.What makes asbestos dangerous?Extremely small fibers are very aerodynamic(fibers can remain airborne for extended periods of time and inhaled into the deep lung)As the asbestos fibers become smaller and smaller during the manufacturing process, the become more aerodynamic. Asbestos fibers can break down to the micron level and remain airborne indefinitely. One micron is one millionth of a meter.
6Asbestos Awareness Friable vs. Nonfriable - what’s more hazardous? Friable - easily crumbled to dust using hand pressureSpray fireproofingPipe insulationNonfriable - not easily crumbled by hand but can be crumbled by mechanical meansFloor tileRoofing productsClickFriable vs. Nonfriable - what’s more hazardous?friable - easily crumbled to dust using hand pressurespray fireproofingpipe insulationFriable materials are of most concern because they can readily become damaged and airborne if not maintained in good condition.nonfriable - not easily crumbled by hand but can be crumbled by mechanical meansfloor tileroofing productsMost nonfriable materials can be rendered friable through mechanical means such as sanding, chipping, drilling, and grinding.
7Asbestos Awareness Physical properties Thermal resistance Forms fibers with high tensile strengthChemically inertAbsorbs soundElectrical insulatorClickPhysical propertiesthermal resistanceasbestos has been used as insulation and fireproofing and various other high temperature applicationsforms fibers with high tensile strengthused as a binder to strengthen products such as cement and floor tilechemically inertused in building materials where chemical exposure is likely to occur such as laboratory counters and fume hoods.absorbs soundused in products in areas to absorb sound such as acoustical plaster and ceiling tiles.electrical insulatorused in old electrical wiring.
8Asbestos Awareness History of uses: Used in classical times by greeks and romansModern use began in 1880’sExtensively used by US during WWIIUsed in buildings extensively 1940’s-1970’sLimited asbestos products still available todayClickHistory of uses:used in classical times by Greeks and RomansUsed as burial shrouds, table cloths, napkinsmodern use began in 1880’sextensively used by US during WWIIShipping industry used asbestos to insulate boilers and piping on shipsused in buildings extensively 1940’s-1970’sInitial use primarily associated with pipe insulation. Use expanded to include spray fireproofing, acoustical plaster, floor and ceiling tile.limited asbestos products still available todayYou can still purchase asbestos containing materials today. They are primarily in the form of nonfriable products that can not release asbestos into the air ( e.g. roofing tar) through normal use.refer to table of asbestos use in US.asbestos use extensive in developing countriesrefer to table of world asbestos use.asbestos use extensive in developingcountries
9Asbestos Awareness How do we know if something is asbestos-containing? Requires laboratory analysis with microscopeCertain products routinely contain asbestosClickHow do we know if something is asbestos-containing?requires laboratory analysis with microscopePeople can not explicitly say whether a building material contains asbestos or not without microscopic analysis by a qualified laboratory. Polarized Light Microscopy (PLM) is used to identify asbestos content in building materials.certain products routinely contain asbestosIndividuals with experience in conducting asbestos building surveys can develop a pretty good idea as to which building materials contain asbestos and which ones do not, however a laboratory analysis is still required.
10Asbestos Awareness Common asbestos-containing materials Pipe, boiler and duct insulationSprayed or troweled plasterSpray fire proofingCement pipes and panelsMechanical gaskets and packingCeiling tilesFloor tile and adhesiveLinoleum backing
11Asbestos Awareness Health hazards of asbestos exposure Asbestosis - fribrotic scaring of the lungs10-20 year latency periodAssociated with high dose exposureSmoking creates synergistic effectIncreased chance of other asbestos diseases
12Asbestosis fatalities Spray-on use endsThis chart from the 1999 Work Related Lung Disease Surveillance Report by the CDC shows the number of deaths in the United states related to asbestosis. As you can see the number of deaths has been rising since the 1960’s. If you think about asbestosis and its relationship to high does exposure, this graph makes sense. Spray applied application of asbestos-containing fireproofing and acoustical plaster occurred during the 50’s, 60’s, and early 70’s. With the latency of asbestosis we would not expect to start seeing the peak of deaths related to asbestosis through the 80’s and 90’s. Because of today's regulatory restrictions on exposure to asbestos, we should see the trend of asbestosis begin to decline.
13Asbestos Awareness Health hazards of asbestos exposure Mesothelioma - cancer of the chest cavity20-40 year latency periodNot necessarily associated with high dose exposureRareAlmost always fatalUnlike asbestosis, the incidence of mesothelioma is consistent and does not seem to be does related. If you here someone say “one fiber can kill you” they are referring to mesothelioma. When people say this they must keep in mind that mesothelioma is rare and that we all have been exposed to asbestos at some time in our life because of the extensive use of asbestos in our society and the fact that asbestos is a naturally occurring mineral.Mesothelioma has had a significant amount of press lately associated with the Minnesota US Representative Bruce Vento who was recently diagnosed with mesothelioma.It is mesothelioma’s apparent lack of dose relationship that has resulted in the extensive asbestos regulations in schools.
14Asbestos Awareness Health hazards of asbestos exposure Lung cancer 20-30 year latency periodMany other causes of lung cancerMost frequent form of asbestos disease todaySmoking synergistic effect (50-90 times)Associated with high doses
15Asbestos Awareness Asbestos is extensively regulated! Regulated by: State and federal OSHAEnvironmental Protection Agency (EPA)Minnesota Pollution Control Agency (MPCA)Minnesota Department of Health (MDH)Asbestos is one of the most regulated substances today.Regulated by:State and Federal OSHAThe OSHA regulations protect employees from excess exposures to airborne asbestos.Environmental Protection Agency (EPA)EPA regulations are designed to protect the environment and in turn the general public from asbestos exposure.Minnesota Pollution Control Agency (MPCA)The MPCA is the EPA governing body in Minnesota.Minnesota Department of Health (MDH)The MDH directs how asbestos is removed from building and by whom.
16Asbestos Awareness OSHA Regulations Requires employee training (i.E. This training)Exposure monitoring when working with asbestosEstablishes “permissible exposure level” for employees = 0.01 fibers per cubic centimeter (cc) of air (1 cc is approximately a sugar cube)Identifies work practicesIdentifies personal protection requirementsIdentifies work practice prohibitions
17Asbestos Awareness EPA and MPCA regulations Requires building survey prior to construction workRemoval of asbestos containing materials before renovation or demolitionEstablishes notification requirementsDefines proper transport and disposal requirementsEPA regulates asbestos in schools
18Asbestos Awareness MDH regulations Requires building survey prior to construction workRequires building owners to maintain asbestos- containing materials in good conditionRequires certification of people working with asbestosIdentifies notification requirementsEstablishes specific removal proceduresEstablishes clearance criteria for removal projects
19Asbestos Awareness Your responsibilities: Do not damage or disturb any asbestos-containing materialsImmediately report the presence of damaged asbestos-containing or suspect asbestos-containing material to your supervisor or asbestos coordinatorVerify that building materials you will be working with are not asbestos-containing
20Asbestos AwarenessAsbestos-containing materials in our facility: