Presentation on theme: "Awareness Updated February 2014"— Presentation transcript:
1Awareness Updated February 2014 AsbestosAwarenessUpdated February 2014
2What is AsbestosAsbestos is the name applied to six naturally occurring minerals that are mined from the earth.AmositeChrysotileTremoliteActinoliteAnthrophylliteCrocidolite
3What is Asbestos Three are used more commonly: Chrysotile - white asbestosasbestos cloth and cement productsAmosite - brown asbestosheat insulation and pipe laggingCrocidolite - blue asbestosvery high temperature and acid resistant purposes
4Asbestos Products Non Friable Friable the asbestos fibres are bonded by another materialFriablenon bonded asbestos fabric or materialis in powder formcan be reduced to powder by hand pressure
5Asbestos Products Asbestos was generally processed as: Fibrous sprayed preformedTextilewovenwoundMixed with a binder
6Asbestos Materials Friable products sprayed fire retardant thermal laggingfire blanketswelding blanketsbacking to sheet vinyl floor coveringflexible connection
7Asbestos Materials Non Friable cement products vinyl floor tiles flat sheetcorrugated sheetpipescompressed sheetvinyl floor tilesswitch boardbrake and clutch lining
8When is Asbestos a hazard When asbestos fibres become airbornefriable- disturbance of loose or non bonded asbestosnon friable- when the cement or resin breaks down
9When is Asbestos a hazard Respirable Fibreless than 3 microns in diameterlonger than 5 micronswith a length to diameter ratio greater than 3:1
10Health effects The body cannot breakdown asbestos fibres. Three primary diseases associated with asbestos exposureMesotheliomaLung CancerAsbestosis
11Asbestos and your health The potential for harm depends on:fibre size and typelength of exposureconcentration of Respirable fibresindividual susceptibilityinfluence of other factors
12Identification of Asbestos Materials containing asbestos are not readily identified.Laboratory analysis- X-ray diffraction- Polarising light microscopy in conjunction with dispersion staining- Electron microscope
13Limit asbestos exposure Installed asbestosbe aware of any installed asbestosasbestos registerasbestos management planDo not disturb asbestosno drilling, cutting, sawing, sandingno activities that creates dust
14Limit asbestos exposure HousekeepingCheck asbestos register before commencing any minor workensure that damaged material is repaired by competent peoplereplace broken or damaged ceiling tilesPolicy and Procedureasbestos management procedurefor accessing ceiling spaceareas where asbestos is present- air monitoring, after hours work
15Management of Asbestos DECD ProcedureAsbestos Management ProcedureRegulations and Codes of PracticeWork Health and Safety Regulations 2012 – Chapter 8 - AsbestosCode of Practice for the Management and Control of Asbestos
16Airborne asbestos fibres Membrane filter methodSample is collected by:- drawing a measured quantity of air through a membrane filter by means of a pump- filter is transformed to a transparent, optically homogenous specimen- the fibres are then sized and counted using a microscope and eyed graticule- the results are expressed as fibres per millilitre of air, calculated from the number of fibres and the measured volume of air sampled.
18Shows 2 plugs with “Warning” labels stuck over them. Same plugs with one label and PVC cap removed to expose asbestos “plug”.
19A single plug with the cap missing – white asbestos. Plug has fallen down making it more visible.Lower right shows plastic former still in place from construction. (These formers were supposed to have been removed during construction).
20Two labeled caps with white asbestos visible in the underside of the slab just right of a paper label.Plugs that have been tampered with and resealed. Note a third type of warning label.
21Another example of white asbestos contamination in the underside of the concrete slab below the yellow sticker.Under side of slab contamination. This example shows 2 separate spots of white asbestos contamination. Each is above the white sticker.Note the white patch left of EC1059 sticker IS NOT asbestos.
22This is a view looking down on top of a slab This is a view looking down on top of a slab. The damaged carpet has been peeled back to show the inside of the PVC sleeve with white asbestos visible around the top of the hole. Cables had been pushed up through this hole to feed a floor fastened power or telephone socket.
23This is unusual contamination on the under side of a slab, approximately 50mm across. A worker has thrown wet white asbestos up during construction and it has remained stuck to the slab.
24Shows loose grey/brown asbestos (Amosite) on top of ceiling tiles under a large water pipe.
25Shows a similar wall penetration with NON ASBESTOS fire proof packing Shows a similar wall penetration with NON ASBESTOS fire proof packing. It is very difficult to distinguish between asbestos and asbestos free fibrous material. All plumbing waste floor penetrations so far have been packed with asbestos free fibrous insulation.
26Shows white asbestos rich mastic sealant on an air conditioning duct flange after the joint had been opened. This is a well bonded form of white asbestos that cannot easily be compromised without high temperatures, some solvents or years of exposure to sunlight.
27There are many uses of asbestos to be found within and around our environment, mostly commonly in the form of asbestos cement products. It can be found as:flat or corrugated sheets used mainly for garages and shedscold water storage tanksexternal rainwater pipes and gutteringfascia boardsas a lining cladding for fire protectionfor internal partition wallsAsbestos cement is a hard, brittle, greyish material, however if there are any suspicions that a product is asbestos it should be treated as such.In DECD worksites, products known to contain asbestos must be marked with appropriate safety signage. Refer to the worksite’s Asbestos Register and Asbestos Management Plan and to the DECD Asbestos Management Procedure
28Some examples of Asbestos Signs Some examples of Asbestos Signs
29Asbestos may be present in many geological samples in varying different forms Refer to Hazard Alert 21 Asbestos in Rock Sample Kits
30While asbestos roofs are not common in DECS worksites, they can be found in some older worksites, and SA homes.There are at least three types of asbestos shingles. Regular flat shingle tiles are shown at top, common diamond shaped tiles are shown at middle, and side-lap tiles are shown below. It is difficult to find asbestos replacement tiles that match the original roof in colour shade. Note the three replacement tiles on the diamond asbestos roof (they appear whiter than the original tiles).Asbestos is a brittle and fragile material. It cannot be walked on as the tiles will crack and these hairline cracks, which are hard to see, will leak. Fragile roof considerations need to be made as well. Signage is appropriate.
31Asbestos sheets on a roof. These sheets are also known as “Deep 6”. This type of roof is fragile when walked upon, and appropriate signage is required. Painting the roof can minimize hazards associated with flaking fibres.
32Twisted yarn with asbestos fibre Twisted yarn with asbestos fibre. Extensively used as caulking, sealing and heat insulating materials on thermal installations and heat conducting systems, eg kilns (above), slow combustion fire doors, incubators, mantles and laboratory ovens (left).
33Asbestos fencing can still be found. This is also known as “Deep 6” Asbestos fencing can still be found. This is also known as “Deep 6”. Similar sheets were also used in roofing. Note its friable nature when broken or chipped. This can be a hazard when removing the fence, or if it is rubbed against.
35Another example of an asbestos “deep 6” style of fencing Another example of an asbestos “deep 6” style of fencing. Removal of such fences should be in accordance with the DECD Asbestos Management Procedure.
36Carrels, common in the later half of the ’70’s and in the 1980-’s, can still be found in some schools. They are often located in “time out” rooms, resource centres, and language rooms. The surfaces are often defaced, due to the secluded nature of the space. Asbestos was often used as a base, underneath the soft plastic/leather surface.
37Backing to sheet vinyl floor covering can be made from asbestos, as pictured above. Vinyl floor tiles can contain asbestos in the tile mix, which deteriorates over time, and can release asbestos fibers. Such flooring should be replaced, or covered, if deemed a hazard.
38Asbestos thermal lagging around pipe work Asbestos cement flue pipesAnother example of asbestos products found in worksites.
39Asbestos thread can be found on gas mantles, used in camping lights Asbestos thread can be found on gas mantles, used in camping lights. Radioactive Thorium is also present in the mantle material. (Thorium when heated by LPG flame, emits radiation that is weighted less heavily in the infrared and more heavily in the visible spectrum, leading to an enhanced output of useful light ). Wash hands after handling.
40Asbestos – white substance in the ground in this picture
42Your comments are welcomed, please contact Health and Safety Services Thanks toGraham Bettison, DAISImages David Ellis, DEMSRobert Connolly, DECDJohn Hisco, DECDYour comments are welcomed, please contact Health and Safety Services