1 / 22

Asbestos

Asbestos. What Is Asbestos?. Group of natural minerals Still mined in some countries Long, thin, and strong fibrous crystals Resistant to heat and corrosive chemicals “Miracle fiber”. Asbestos Facts. 6 types 3 most common in products: Chrysotile Amosite Crocidolite. Why was it used?.

peterkline
Télécharger la présentation

Asbestos

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Asbestos

  2. What Is Asbestos? • Group of natural minerals • Still mined in some countries • Long, thin, and strong fibrous crystals • Resistant to heat and corrosive chemicals • “Miracle fiber”

  3. Asbestos Facts • 6 types • 3 most common in products: • Chrysotile • Amosite • Crocidolite

  4. Why was it used? • Fire and heat resistance • Spray-applied fireproofing • Heat resistant clothing & gloves/textiles • Gaskets, brake pads, etc. • Insulation qualities (thermal & acoustic) • Pipe, duct, tank insulation • Sound board, acoustic panels, acoustic ceiling tiles and sprays

  5. Uses cont. • Chemical resistance • Fume hoods • Lab table tops • Cement panels/pipes • Adds “tensile” strength • Flooring materials (tile/sheeting) • Plaster/stucco, joint compound

  6. Uses cont. • Adds durability • Roofing materials • Flooring materials • Paint • Asbestos cement panels/pipes • Assists in application of other products • Any spray-applied product • Trowelled-on plasters and adhesives • Mudded elbows or junctions on piping or trowelled-on insulation

  7. Health Hazard • No health risk when asbestos materials are intact • Potential inhalation hazard from damaged asbestos materials • Airborne fibers are usually microscopic

  8. Health effects • Most asbestos-related disease results from long-term (often heavy) exposure to asbestos. • Common occupations with long-term exposures: • fabricators, insulators, construction (carpentry, HVAC, plumbing, bricklaying)

  9. Asbestos Regulations • Started in 1972, involved phaseout program • Included: • Ban on many applications of asbestos • Regulations on removal, transport and disposal • Regulations regarding protection of workers • Regulations regarding protection of K-12, public buildings

  10. Friable Asbestos • Any ACM which can be crumbled, pulverized or reduced to powder by hand pressure. • Friable materials: • Pipe insulation • Insulating boards • Insulating textiles

  11. Non-friable Asbestos • Any ACM which, in its current state, cannot be crumbled, pulverized or reduced to powder by hand pressure. • (includes ceiling and floor tiles, caulking) • Non-Friable asbestos can become Friable w/: • Water or heat damage • Age or natural deterioration • Mechanical disturbance (sanding/abrading/cutting/grinding, etc.)

  12. In-Place Management • EPA recommends an in-place management program • Removal may create hazards. • Repair as needed. • Removal is required only during building demolition or renovation • Avoiding disturbance is ideal!

  13. EPA AHERA Program (Asbestos Hazard Emergency Response Act) • Enacted in 1986 to protect K-12 • Requires: • Asbestos management plan • Includes management in place • Specific controls and abatement practices • Regular inspections • Parental notification of any abatement activities and annual notification regarding the availability of the plan

  14. NESHAP National Emission Standard for Hazardous Air Pollutants (EPA Rule) • Applies to buildings and structures regardless of age of construction. • Is triggered for: • All building demolitions • Any renovation where the following is disturbed: • Greater or equal to: 160 sq ft of regulated ACM • Greater or equal to: 260 linear ft of regulated pipe insulation

  15. NESHAP cont. • Requires: • Inspection and development of report • Notification (10 working days) • Work practices • Waste management • Training

  16. Cal-OSHA considerations • Asbestos workers: Ensure proper work practices/training/supervision • Occupant and non-asbestos contractor safety

  17. Location of asbestos on campus • Asbestos-containing materials can be found in many campus buildings constructed prior to 1980. • Sampling of campus buildings for asbestos completed in 1994 and during TII Project.

  18. Management of remodeling projects and maintenance • EH&S reviews all remodeling/demolition plans • Facilities Management Project Managers are provided with training

  19. EHS/Fac Mgmt requirementsPrior to abatement • Arrange for sample collection and analysis as necessary • Review lab results to determine which materials contain asbestos • Review abatement needs with Certified Asbestos Abatement contractor

  20. ResponsibilitiesDuring abatement • Contractors must meet/exceed all EPA and OSHA requirements • Work scheduled during off hours whenever possible • All work must be under containment • Building HVAC system is isolated • Room kept under negative pressure • All air leaving the room is filtered • Limited access

  21. ResponsibilitiesDuring abatement cont. Ensure that: • off-hours employees are notified • signage & posted material is maintained • Containment and negative pressure is maintained

  22. Clearance sampling/analysis • Air samples are collected by a certified consultant at the end of the abatement work. • Air samples are analyzed by an certified laboratory. • Clearance is achieved: • PCM: analysis that reads all fibers • Clearance level: <.01 fibers/cc • TEM: analysis that reads only asbestos fibers • Clearance level: <70 structures/cc

More Related