“Providers of Health, Safety and Environmental Solutions Worldwide”

Hazardous Materials in Heritage Buildings

Presented By:Robert Lovegrove

Senior Project Manager

Office: 905-795-2800

Asbestos

Principals of Asbestos

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Serpentines

Chrysotile

Amphiboles

Crocidolite

AmositeAnthophylliteTremoliteActinolite

Chrysotile

(Brown)Crocidolite

(Blue)

Amosite

(White)

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Heritage Buildings Contain Asbestos

Where Asbestos Can Be FoundPipe insulationTank and roof insulationThermal insulationFirebreak boardsFluesPartitions Roof slates, deckingStrings for sealing radiatorsString around window glazingCisternsRoofing feltsFloor tiles

Textured coatingsDecorative panelsGaskets and washers to machineryInsulation paper/ cardboard under pipe lagging and floor tilesJointing and packing yarns and materials to boilers, ovens, electrical cables and fuse boardsPre-formed products such as cable conduits, rainwater goods, fencing, roof promenade tiles, window sills, bath panels, draining boards, worktops, ductsRoof sheets and cladding

Over 3000 different building materials have been manufactured with asbestos

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Where Asbestos Can Be Found

Where Asbestos Can Be Found

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How is asbestos exposure created?

When asbestos containing materials are disturbed they release fibresAsbestos fibres remain airborne for long periods of time

How is asbestos exposure created?

Health issues with asbestos

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Problems arise from inhalation of asbestos fibresThe body can not remove the fibres once deposited in the airways and lung tissueEach exposure increases the likelihood of developing long term detrimental health effectsExposure to asbestos may result in the development of one or more of the following diseases: 1. Asbestosis2. Mesothelioma3. Other cancers

Abatement – Safe Handling

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Prevention of fibre releaseHazard containmentPersonal Protective Equipment (PPE)

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Lead

Why Lead Was Used

Widely available

Low melting point

High density

Blocks sound

Durable

Prevents corrosion

Adds colour and brightens paints

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Very abundant

Easy to extract

Easy to shape (malleable)

Kills mould and mildew

Helps paint dry faster

Adds colour to mortar and other concrete materials

Where Lead Can Be Found

Paint and surface coatings

Flashing & decorative finishes

Additive in other alloys (e.g. tin)

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Where Lead Can Be Found

Late 19th and early 20th century tinted mortar at stone cladding

Pipes

Cable and wire casing;

Babbitt (bearing metal)

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Where Lead Can Be Found

Stained glass and window came

Structural steel primer & paint

Radiation and sound shielding (bricks or sheeting)

Solder (plumbing and electrical)

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Sources of Lead Exposure

Lead Poisoning

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Lead Warning Signs

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Abatement – Safe Handling

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Three basic methods of lead abatement:

• Replacement/Repair

• Encapsulation

• Removal

Methods used to reduce the potential exposure to lead either by complete removal or by in-situ management strategies

“Providers of Health, Safety and Environmental Solutions Worldwide”

QUESTIONS

Office: 905-795-2800