Objectives • Background • Standards • Contracting • Repair/Removal • Maintenance Activities
Background • Asbestos • Origin • Properties • Uses • Diseases
Asbestos • Is a naturally occurring fibrous mineral which is mined like diamonds and comes in two forms: • Serpentine - snake like • Amphibole - needle like • Mineral content includes: • Silica • Water • Iron • Magnesium (may include)
Asbestos Types • Chrysotile - 95%type used in the United States • Amosite - Used to harden • Crocidolite - Frequently found as a contaminant of Amosite
Origins • Found in nature • Arctic • Deserts • Mountains • Snow • Drinking water
Origins continued • Mined • USA • Canada • Russia • South Africa • Italy
Properties • Tensile strength • Flexibility • Heat Resistant • Chemical Resistant
Uses • Historical • 480 BC - Candle wicks • Egyptians wove asbestos into cremation shrouds • Romans used in textiles like cremation shrouds, lamps, napkins and table cloths • Wide spread uses in the late 1800 and 1900 • Present Day • Acoustical spray-on asbestos • TSI -Thermal system insulation • brakes/clutches • vinyl floor tile
Diseases • Asbestosis - Scarring of the lungs due to cell damage from inhalation of asbestos fibers. • Mesothelioma - Cancer of the lining around the lungs called the mesothelium. Fatal • Lung Cancer - Cancer of the bronchioles. Synergistic effect with cigarette smoking.
Standards • COMDTINST 6260.16A • 29 CFR 1910.1001 (General Industry) • 29 CFR 1926.1101 (Construction) • 40 CFR 61.156 (NESHAPS)
Vocabulary • ACM: Asbestos-containing material. Material which contains one or more percent asbestos. • Friable/Nonfriable: Friable-ACM which can be crumbled under hand pressure. Nonfriable-ACM which can not be crumbled or become airborne easily such as floor tile or transite. • TSI: Thermal system insulation • PACM: Presumed asbestos-containing material. TSI or surfacing materials installed prior to 1980. • Competent person/Qualified person: Someone who is capable of identifying existing and predictable hazards in the surroundings or work conditions which are unsanitary, hazardous or dangerous especially in regards to asbestos and who is authorized to select the appropriate control strategy and can take prompt corrective actions to eliminate them.
Vocabulary of Standards • PEL: OSHA Permissible Exposure Limit-limit which is based on an 8-hour time weighted average and can not be exceeded. (This is law.) • TWA: Averaged airborne concentration of a substance over a given period of time such as eight hours. • Excursion Limit: A 30 minute limit which must not be exceeded more than twice per day. • TLV: a time weighted average concentration for a normal 8-hour work day and a 40-hour work week, to which nearly all workers may be repeatedly exposed, day after day, without adverse effects. (recommendation from ACGIH).
Criteria • PEL - 0.01 f/cc • Excursion Limit - 1.0 f/cc
Program Elements • Responsibilities • Asbestos Management Plan • Identification • Repair and Removal
Asbestos Management Plan • Designation of a Coordinator • Identification • Inventory • Labeling • Management in Place
Identification • Sampling - Sampling should be done as outlined in the handout provided and provided to MLCPAC (kse) to process for analysis. • Analysis - Analysis is done by an accredited lab.
Sampling • Who can Sample - Legally the person sampling must be A CIH or certified by attending an AHERA course • Training Requirements to Sample - Classes referred to as AHERA certified by the EPA • Uses of Samples Results - Samples taken by personnel who are not certified to take samples can only be used for establishing the cost of the project. The can not be used by the contractor.
Analysis • PLM-Polarized Light Microscopy • TEM-Transmission Electron Analysis
Labels DANGER CONTAINS ASBESTOS FIBERS AVOID CREATING DUST CANCER AND LUNG DISEASE HAZARD
Repair and Removal • Prohibited Activities • Contract Concerns • PACM
Prohibited Activities • Coast Guard personnel are prohibited from repairing or removing asbestos-containing materials. • Exceptat the CG Yard, Base Ketchikan and underway casualty repair activities.
Contract Concerns • MLCPAC (kse) Review spec packages • Inform contractors • Standards to be followed • Possible presents of asbestos • Recommend independent consulting firm to oversee the abatement.
Maintenance Activities Involving ACM • Buffing floor tiles • Replacing gaskets • Replacing brake pads
Definitions for Maintenance Operations • Wet Methods: Wetting the material to be removed prior to disturbing it. Prefer the use of amended water over plain water. • Amended Water: Water which has had a chemical added to make it penetrate and adhere to the material be removed more readily. • HEPA: high efficiency particulate air. A filter or filtration system designed to trap and retain 99.97 % of all particles 0.3 micrometers or greater.
Maintenance Procedures Involving ACM • Buffing and waxing floor tiles • Must have a heavy wax coating • No abrasive buffers • Gasket material replacement • Must be done using wet methods • Brake replacement • Must use HEPA vacuum drum to catch fibers from asbestos brakes or • Interim wet methods
Prohibited Procedures • Sanding, drilling, grinding, sawing with high speed abrasive discs, anything that causes asbestos fibers to be released from the material. • Dry sweeping, shoveling or other forms of dry clean-up and use of compressed air to remove asbestos debris.
Actual Abatement Activities • Beyond the scope of this training. • Standards are: • Complicated • Lengthy • Confusing • Require extensive training
Summary • Asbestos is used throughout the Coast Guard in many ways, e.g. insulation, gaskets, brakes, etc. • Exposure to asbestos can cause diseases that can be fatal. • Asbestos must be identified, inventoried, labeled, removed or managed in place. • Coast Guard personnel are prohibited from working with asbestos (with notable exceptions). • If personnel must work with asbestos, they must have extensive training.
Where to get more information • MLCPAC (kse) • Coast Guard Island - (510) 437-3893 • District health and safety representatives • Headquarters • Consulting services