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Respirator Program

Respirator Program. Agenda. WorkSafeBC Requirements Definitions Hazard Identification and Risk Assessment Types of Respirators Respirator Selection Fit Testing. WorkSafeBC Regulation. Workers who are or may be exposed to air contaminants that exceed: an 8-hour TWA ceiling limit, or

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Respirator Program

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  1. Respirator Program

  2. Agenda • WorkSafeBC Requirements • Definitions • Hazard Identification and Risk Assessment • Types of Respirators • Respirator Selection • Fit Testing

  3. WorkSafeBC Regulation • Workers who are or may be exposed to air contaminants that exceed: • an 8-hour TWA • ceiling limit, or • short term exposure limit

  4. Definitions • Air purifying respirator • Canister and cartridge • Escape respirator • Fit check

  5. Definitions • Fit test • Hazard Ratio • HEPA filter • IDLH

  6. Definitions • Maximum Use Concentration • Qualitative fit test • Quantitative fit test • SCBA

  7. Respiratory Hazard Identification and Risk Assessment

  8. Hazard Identification & Risk Assessment • Identify hazards • Control risks • Assess and control remaining hazards • Select and provide respirators • Fit test, train and issue respirators

  9. Hazard Identification & Risk Assessment • When a respiratory hazard is identified: • Determine nature of contaminant • Determine probability of exposure • Determine frequency of exposure • Determine permissible exposure limit

  10. Hazard Identification & Risk Assessment • Breathing Hazards • Particles (dusts, fibres, mists, fumes • Gaseous (gases and vapours) • Oxygen deficiency • Combination hazards

  11. Hazard Identification & Risk Assessment • Particle Hazards – Dusts and Fibres • Formed by breakdown of solids • Sanding, milling, cutting crushing, grinding • Irritate the airways • Can cause disease • Asbestos, silica dust

  12. Hazard Identification & Risk Assessment • Particle Hazards - Mists • Very small liquid droplets • Formed by spraying, shaking, mixing, stirring • Irritate or damage exposed skin, eyes, lungs, airways • Damage to internal organs

  13. Hazard Identification & Risk Assessment • Particle Hazards - Fumes • Tiny solid particles • May be formed by welding, smelting, soldering, brazing • Irritation to serious lung and nerve damage

  14. Hazard Identification & Risk Assessment • Gaseous Hazards • Gases – Carbon monoxide, Chlorine

  15. Hazard Identification & Risk Assessment • Vapours • Mix with air • Solvents, gasoline, acetone • Enter blood stream • May cause damage to nerves and internal organs

  16. Hazard Identification & Risk Assessment • Oxygen Deficiency • Normal air contains 21% oxygen • O2 deficiency can develop from • Rotting, rusting, burning • Displacement by other gases

  17. Types of Respirators

  18. Types of Respirators • Types of respirators • Half facepiece • Full facepiece • Air Purifying Respirators (APR) • Air Supplying Respirators • Escape Respirators

  19. Types of Respirators • Half facepiece respirators • Cover only nose, mouth and chin • Available as • Filtering facepiece (disposable), or • Elastomeric facepiece with cartridges

  20. Types of Respirators • Disposable Half Facepiece Respirators • Known as single-use or disposable • No replacement parts • Must have two straps

  21. Types of Respirators • Elastomeric Half Facepiece Respirators • Made of silicone, thermoplastic or rubber • Cartridges or filters • One-way valves • Greater level of protection than disposable respirators

  22. Types of Respirators • Full FacepieceRespirators • Cover full face • Silicone, thermoplastic or rubber • One or more cartridges or filters • Clear lens • Used when contaminants irritate the eyes • Offer greater level of protection

  23. Types of Respirators • Air Purifying Respirators • Use a filter, cartridge or canister • Must know the concentration of the contaminant • Not for oxygen deficient atmospheres • 2 types: non-powered and powered

  24. Types of Respirators • Non-powered Air Purifying Respirators • Either half face or full face • Similar operation in both

  25. Types of Respirators • Powered Air Purifying Respirators (PAPR) • Battery powered blower • Easier to breath • More protective than non-powered • Still air purifying only

  26. Types of Respirators • Powered Air Purifying Respirators – continued • Available in • Half face • Full face • Hood • Helmet

  27. Types of Respirators • Escape Respirators • For emergency escape only • Never used for entry into contaminated area • Must be carried on worker in potentially hazardous area • Air purifying or air supplying

  28. Types of Respirators • Filters and cartridges • Remove specific contaminants from the air • Must use proper cartridge • Only effective up to certain concentration of contaminant

  29. Types of Respirators • Particulate Filters • Nine classes of particulate • N series (Not resistant to oil) • R series (Resistant to oil) • P series (Oil proof)

  30. Types of Respirators • Gas and Vapour Cartridges • Remove gases and vapoursfrom air • Trap or react with contaminants • Act like sponges • Limited capacity • Breakthrough

  31. Types of Respirators • Air purifying canisters • Work like cartridges • Larger and last longer • Worn on chin, chest or back

  32. Types of Respirators • Cartridge Warning Properties • Contaminants must have warning properties • Smell, taste, or breathing irritation • Warning properties differ for each contaminant • Odour threshold

  33. Types of Respirators • Cartridge / Filter Maintenance • Store in sealed container • Replace filters / cartridges regularly • Date filters / cartridges when installed • Match cartridges with contaminants

  34. Types of Respirators • Air Supplying Respirators • Supplied air (airline) • Self-contained breathing apparatus (SCBA)

  35. Types of Respirators • Supplied Air Respirators • Provide clean air • High pressure or low pressure systems • Must be approved airlines

  36. Types of Respirators • Supplied Air Respirators – continued • Hood or helmet • No face seal • No resistance to breathing • Full face airline • Face seal • Positive pressure minimizes leaking

  37. Types of Respirators • Self Contained Breathing Apparatus • Provides air from cylinder carried by wearer • Highest level of protection • Permitted in IDLH conditions

  38. Respirator Selection

  39. Respirator Selection • Respirators must be selected in accordance with: • The WorkSafeBC Regulation • CSA Standard Can/CSA-Z94.4-93 • 13 Step respirator selection approach

  40. Respirator Selection • Identify the Breathing Hazard • Ensure atmosphere is not oxygen deficient • Is there an emergency? • Are there hazardous air contaminants?

  41. Respirator Selection • Check the concentration of each contaminant • Monitor to determine concentration • Done by knowledgeable person • Use historical measurements if available • If unknown concentration use positive pressure SCBA

  42. Respirator Selection • Compare with WorkSafeBC Exposure Limits • If no exposure limits use positive pressure SCBA • Compare workplace concentration with WorkSafeBC exposure limits

  43. Respirator Selection • Check IDLH Concentration • Is concentration less than IDLH? • If not, use supplied air respirator

  44. Respirator Selection • Check Contaminant Properties • Inhalation hazard • Eye irritation • Skin irritant or skin absorption • Warning properties / odour threshold • Decomposition products

  45. Assigned Protection Factor • Each type of respirator is assigned an APF • Examples: • Half facepiece (non powered): 10 • Full facepiece (non powered): 50 • Full facepiece (powered): 100 • SCBA (positive pressure): 10,000

  46. Respirator Selection • Calculate the Hazard Ratio • Airborne contaminant concentration / 8-hour TWA • Compare with assigned protection factors • Choose respirator

  47. Respirator Selection • Calculate Maximum Use Concentration (MUC) • 8-hour TWA x APF for respirator being considered • Air purifying respirators up to the MUC • If over MUC, supplied air must be used

  48. Respirator Selection • Identify General Type of Respirator Required • Air supplying – go to Step 13 or • Air purifying – go to Steps 11 - 13

  49. Respirator Selection • Consider State of Contaminant • For air purifying respirators • If contaminant is a gas or vapour go to Step 11 • If contaminant is a particulate only go to Step 12

  50. Respirator Selection • Warning Properties • Smell, taste, breathing irritation • If no adequate warning properties use: • Air-supplying respirator • Air-purifying respirator with end-of-service-life indicator • Air-purifying respirator with cartridges changed out regularly

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