Asbestos
Dec 28, 2015
Asbestos
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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”
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Asbestos Facts6 types
3 most common in products:•Chrysotile•Amosite•Crocidolite
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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
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Uses cont.•Chemical resistance
• Fume hoods• Lab table tops• Cement panels/pipes
•Adds “tensile” strength• Flooring materials (tile/sheeting)• Plaster/stucco, joint compound
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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
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Health Hazard•No health risk when asbestos materials
are intact•Potential inhalation hazard from damaged
asbestos materials•Airborne fibers are usually microscopic
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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)
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Asbestos RegulationsStarted 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
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Friable Asbestos •Any ACM which can
be crumbled, pulverized or reduced to powder by hand pressure.
•Friable materials:
• Pipe insulation• Insulating boards• Insulating textiles
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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.)
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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!
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EPA AHERA Program (Asbestos Hazard Emergency Response Act)
Enacted in 1986 to protect K-12Requires:•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
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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
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NESHAP cont.Requires:
•Inspection and development of report•Notification (10 working days)•Work practices•Waste management•Training
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Cal-OSHA considerations•Asbestos workers: Ensure proper work practices/training/supervision
•Occupant and non-asbestos contractor safety
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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.
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Management of remodeling projects and maintenance
EH&S reviews all remodeling/demolition plans
Facilities Management Project Managers are provided with training
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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
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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
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ResponsibilitiesDuring abatement cont.
Ensure that:•off-hours employees are
notified•signage & posted material
is maintained•Containment and negative
pressure is maintained
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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