Asbestos.ppt

《Asbestos.ppt》由会员分享，可在线阅读，更多相关《Asbestos.ppt（22页珍藏版）》请在麦多课文档分享上搜索。

1、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?,Fire and heat resista

2、nce 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,Uses cont.,Chemical resistance Fume hoods Lab table tops Cement pane

3、ls/pipesAdds “tensile” strength Flooring materials (tile/sheeting) Plaster/stucco, joint compound,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

4、Mudded elbows or junctions on piping or trowelled-on insulation,Health Hazard,No health risk when asbestos materials are intact Potential inhalation hazard from damaged asbestos materials Airborne fibers are usually microscopic,Health effects,Most asbestos-related disease results from long-term (oft

5、en heavy) exposure to asbestos.Common occupations with long-term exposures: fabricators, insulators, construction (carpentry, HVAC, plumbing, bricklaying),Asbestos Regulations,Started in 1972, involved phaseout program Included: Ban on many applications of asbestos Regulations on removal, transport

6、and disposal Regulations regarding protection of workers Regulations regarding protection of K-12, public buildings,Friable Asbestos,Any ACM which can be crumbled, pulverized or reduced to powder by hand pressure. Friable materials: Pipe insulation Insulating boards Insulating textiles,Non-friable A

7、sbestos,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/cuttin

8、g/grinding, etc.),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 renovationAvoiding disturbance is ideal!,EPA AHERA Program (Asbestos Hazard Emergency Response Act),Enacted in 1986 t

9、o 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,NESHAP National Emission Standard for Hazardou

10、s 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 insulati

11、on,NESHAP cont.,Requires:Inspection and development of report Notification (10 working days) Work practices Waste management Training,Cal-OSHA considerations,Asbestos workers: Ensure proper work practices/training/supervisionOccupant and non-asbestos contractor safety,Location of asbestos on campus,

12、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.,Management of remodeling projects and maintenance,EH&S reviews all remodeling/demolition plansFacilities Management Projec

13、t Managers are provided with training,EHS/Fac Mgmt requirements Prior to abatement,Arrange for sample collection and analysis as necessaryReview lab results to determine which materials contain asbestosReview abatement needs with Certified Asbestos Abatement contractor,Responsibilities During abatem

14、ent,Contractors must meet/exceed all EPA and OSHA requirementsWork scheduled during off hours whenever possibleAll work must be under containment Building HVAC system is isolated Room kept under negative pressure All air leaving the room is filtered Limited access,Responsibilities During abatement c

15、ont.,Ensure that: off-hours employees are notified signage & posted material is maintained Containment and negative pressure is maintained,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,