1. 05/29/02 1 POST REMOVAL LOCKDOWN AND SPRAYBACK PROCEDURES Understand what is meant by lockdown/sprayback operations Understand decision criteria used in lock-down/sprayback procedures Become familiar with the various asbestos-free substitutes available Understand factors which might influence the use of certain sprayback materials

2. 05/29/02 2 LOCKDOWN Application of a protective coating or sealant to “lockdown” or encapsulate any residual fibers that might be present after removal has taken place.

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5. 5 SPRAYBACK The process of replacing asbestos-containing material that was originally present with an effective asbestos-free substitute.

6. 05/29/02 6 ASBESTOS USED FOR Fireproofing Thermal insulation Acoustical insulation Condensate control Decoration

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9. 9 SPRAYBACKS FOR THERMAL INSULATION Mineral wool Exfoliated Vermiculite Treated Cellulose Fibrous Glass

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11. 05/29/02 11 SPRAYBACKS FOR ACOUSTICAL INSULATION Spray-applied Cellulose Mineral Wool Fibrous Glass Perlite

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13. 05/29/02 13 SPRAYBACKS FOR CONDENSATE CONTROL Foam Rubber Cork Fibrous Glass

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15. 05/29/02 15 SPRAYBACKS FOR HOT PIPES Fibrous Glass Asphalt-impregnated Paper Calcium Silicates Mineral Wool

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17. 05/29/02 17 SUMMARY Ensure lockdown and sprayback are compatible No new health hazard presented Ensure sprayback has similar desired properties