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McMaster University Asbestos Awareness. Environmental & Occupational Health Support Services. Topics Covered. Properties of asbestos Uses of asbestos Health hazards of asbestos Activities resulting in potential asbestos exposure Asbestos regulations Where to get help.

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Mcmaster university asbestos awareness l.jpg
McMaster UniversityAsbestosAwareness

Environmental & Occupational Health Support Services


Topics covered l.jpg
Topics Covered

  • Properties of asbestos

  • Uses of asbestos

  • Health hazards of asbestos

  • Activities resulting in potential asbestos exposure

  • Asbestos regulations

  • Where to get help


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Properties of Asbestos

  • Naturally occurring fibrous minerals

  • Good tensile strength

  • Flexibility

  • Heat resistant

  • Electrical resistance

  • Good insulation

  • Chemical resistant

Asbestos ore

Asbestosfibers


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Types of Asbestos

  • Tremolite(possible contaminant in vermiculite)

  • Actinolite

  • Anthophyllite

  • Chrysotile

    • “White Asbestos”

  • Amosite

    • “Brown Asbestos”

  • Crocidolite

    • “Blue Asbestos”


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Uses of Asbestos

  • Thermal system insulation

  • Surfacing materials

  • Reinforcement of materials

  • Fireproofing

  • Acoustic and decorative plaster

  • Textiles

Asbestos insulated pipe in utility space

Sprayed-on fireproofing material


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Uses of Asbestos

  • Friction materials (brakes, clutches, etc.)

  • Asphalt and vinyl felts

  • Papers and adhesives

  • Flooring and roofing materials

  • Filters, sealants, caulk, and gaskets

Vinyl flooring



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Some Asbestos-Containing Materials Building

  • Cement Pipes

  • Cement Wallboard

  • Cement Siding

  • Asphalt Floor Tile

  • Vinyl Floor Tile

  • Vinyl Sheet Flooring

  • Flooring Backing

  • Construction Mastics (floor tile, carpet, ceiling tile, etc.)

  • Acoustical Plaster

  • Decorative Plaster

  • Textured Paints/Coatings

  • Ceiling Tiles and Lay-in Panels

  • Spray-Applied Insulation

  • Blown-in Insulation

  • Fireproofing Materials

  • Taping Compounds (thermal)

  • Packing Materials (for wall/floor penetrations)

  • High Temperature Gaskets

  • Laboratory Hoods/Table Tops

  • Laboratory Gloves

  • Fire Blankets

  • Fire Curtains

* Source: EPA


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Some Asbestos-Containing Materials Building

  • Elevator Equipment Panels

  • Elevator Brake Shoes

  • HVAC Duct Insulation

  • Boiler Insulation

  • Breaching Insulation

  • Ductwork Flexible Fabric Connections

  • Cooling Towers

  • Pipe Insulation (corrugated air-cell, block, etc.)

  • Heating and Electrical Ducts

  • Electrical Panel Partitions

  • Electrical Cloth

  • Electric Wiring Insulation

  • Chalkboards

  • Roofing Shingles

  • Roofing Felt

  • Base Flashing

  • Thermal Paper Products

  • Fire Doors

  • Caulking/Putties

  • Adhesives

  • Wallboard

  • Joint Compounds

  • Vinyl Wall Coverings

  • Spackling Compounds


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Asbestos is an Inhalation Hazard Building

  • Breathable fibers are deposited in the alveoli, the ending small air sacs in the lungs.

  • Body’s defense mechanisms cannot break down the fibers.

  • Fibers cause damage to respiratory system.

Pleura

Alveoli


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Asbestos-related Diseases Building

  • Asbestosis

  • Mesothelioma

  • Lung Cancer

  • Other cancers

  • Usually symptoms take 15 to 30 years or more to develop

  • Health effects from asbestos exposure may continue to progress even after exposure is stopped.


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What does Friable mean?? Building

  • Friable: can be easily crumbled or crushed by hand, releasing fibers into the air

  • Very small fibers stay in the air for long periods

  • Damaged or deteriorated ACM increases friability

Photo of friable asbestos


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How do asbestos fibers get in the air? Building

  • Mechanical action on ACM (cutting, sawing, grinding, sanding, drilling, buffing)

  • Disturbing/breaking ceiling tiles

  • Removing/replacing insulation

  • Disturbing sprayed-on asbestos

  • Damaged/deteriorated ACM

  • Asbestos abatement project

Water damage, deterioration


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Asbestos Regulations - Ontario Building

  • Designated Substances

  • Reg 279/05 Asbestos

  • Reg 278/05 Asbestos on Construction Projects


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University Responsibility Building

  • Maintain accurate inventory of Asbestos on campus

  • Follow Reg 278 when removing the asbestos

  • Provide information under the ‘Right to Know’

  • Conduct occupant meetings prior to construction

  • Conduct awareness sessions for JHSC members or others


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Exposure Control Building

  • Type 1 – non-friable

    • Wet methods

    • Prompt disposal

    • Housekeeping

  • Type 2 – friable small

    • Unventilated enclosure

  • Type 3 – friable large

    • Ventilated enclosure, isolation

HEPA vacuum units

HEPA filter = high efficiency particulate air filter


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Air Monitoring Building

  • Air monitoring is conducting during Type 3 projects only.

  • Conducted at the start, during and following a project.

  • Clearance is given prior to enclosures being torn down.


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Questions? Building

Contact EOHSS at ext 24352

or

Physical Plant at ext 24740


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