USDA USDA 10/29/98 10/29/98 33 33 Respiratory Protection Respiratory Protection NAA Respiratory Protection Program and Training
Dec 22, 2015
USDAUSDA 10/29/9810/29/98 3333
Respiratory ProtectionRespiratory ProtectionNAA Respiratory ProtectionProgram and Training
Respiratory Hazards
• Grinding operations-metal, plant
• Welding
• Pesticide Applications
• Ethylene oxide
• Rescue Operations
• Formaldehyde use
• Confined Space
Restrictions and Requirements for Respirators
• Have a Respiratory Protection Plan
• Conduct fit testing plus with routine fit check
• No respirator will not be used when facial hair or abnormalities interfere with seal
• Respirators must be worn conscientiously
• All units must be MSHA/NIOSH approved
Restrictions and Requirements
• Always leave work area if failure of unit is suspected
• Always use the highest protection factor available as a safety margin
• Rely on canister change schedules and not solely warning properties
Engineering, Administrative, Personal Controls
Hoodsventilation
spraybooths
SOPSSubstitutionShift Change
Training
Use respiratorMedical program
care of RP
Any Respirator is Useless
• IDLH- useless• inappropriate canister• no physiological effects
(taste,odor)• Environmental factors• Wearer variability• Poor canister change out
Reasons for General Respiratory Selection
• Dusts/Fumes/mists
• Maintenance procedures
• Organic vapors
• Pesticide dust and sprays
• Formaldehyde
• Radionuclides
• Oxygen Deficient Atmospheres
Comparisons/Positive Considerations of APRs
• Provides minimal interference with wearer movement
• Units with ESLI provide safety measure• best when used with chemicals that have
adequate warning qualities• cost effective• In low particulate atmosphere, provide
protection for long time
Limits of APRs
• Worker fatigue due to filter resistance
• not for IDLH atmospheres
• not for confined space entry
• not for atmospheres with unknown contaminants
• high relative humidity can be problematic
• face leaks can result in inhalation
Limits of Supplied Air Respirators (SARS)
• Use for short periods of time
• Relatively high cost and maintenance
• restricts movement
Comparisons/Positive Considerations
• Affords entry into unknown atmospheres
• SARs with air compressor provide extended periods of protection
• Affords entry into total concentrations of particulate that are high
• Sensory warning properties of toxins plays minor role with SCBA
Methods of Donning and Fit Test
• General Do’s and Don’ts
• Performance of respirator inspection and review of parts
• Donning and doffing procedures for negative half face respirators
• Negative and positive pressure test
• Film
Do’s and Don'ts
• Never don a respirator unless you are fit to wear one
• Never don a respirator without inspecting it first
• Do wear only the size/model that was fit tested for you
• Do have a shaven face for good seal
Do’s and Don’ts
• Weight fluctuations of 10 pounds or more, pregnancy, facial scars will deter your fit-retest for fit
• Appropriate sanitation and storage is mandatory
Performance of Respirator Inspection/Review of Parts
• Each unit consists of
• face piece
• headbands
• Gaskets
• Inhalation and exhalation valves
• Filter
Inspection Point One- Facepiece
• Check for deterioration or distortion of the face piece
• Check visibility of mask and clips for eyeglasses
• Check for stripped threads
The Headbands/Harness
• Check the elasticity of the bands, rubber deterioration
• Exhalation valve must lie flat against its seat, no chips, nicks or tears should exist
• Check for dirt or soap residual and remove any found
• Remove this valve to fully inspect and replace after inspection
Powered Air purifying Respirator Packs
• Ensure your unit is fully charged with powercord connections checked
Donning procedures for Negative Pressure Respirators
• 1. Respirator, when mounted over face, is paced over the bridge of the nose with straps loose, bottom rests against chin
• 2. The cranial headband, the longest on top, is placed over top of head, short band around neck
Donning Procedures Continued
• Headband is adjusted by moving the slides until facial seal is snug
• Do the cranial headband first, and then pull side straps simultaneously with equal strength
• When hooded coveralls are worn, pull hood up first before placing respirator on head.
Positive and Negative Fit Testing Exercise
• Inhalation Test
• 1. “Seat” the mask by rapidly moving head from side to side and up and down, while taking deep breaths.
• 2.Place palms on open end of canister, press firmly with even pressure and inhale. Respirator should collapse with no leaks
Exhalation test
• To test the respirator during exhalation, close off the exhaust valve with palm of hand and exhale gently.
• Note pressure should build inside of mask without leaks around face seal
Methods of Qualitative and Quantitative Fit Tests
• Qualitative fit test involves the introduction of harmless sweet substance in the breathing zone of the wearer- it is determined if the person can taste
• Involves the introduction of an aerosol to the wearer while in test chamber. Air concentration inside an outside mask is measured to determine leaks
Doffing(Removal) the Respirator
• Important to note that doffing the unit must be part of overall decontamination process
• 1. Remove gross contamination
• 2. Remove contaminated clothing
• 3. Shower/respirator in bag
• 4. Respirator is cleaned separately
Maintenance and Storage of Respirators
• Routinely inspect respirators before and after each use and after cleaning and maintenance to ensure unit is in proper working order
• Replace parts as necessary and do not combine different manufacturer parts
• Employees are responsible for the day to day cleaning and maintenance of their device.
Cleaning, Washing, Sanitizing, Maintaining and Storing
• Respirators shall be cleaned and sanitized after each use
• Remove canister and discard• Immerse respirator in 120 degree F solution
of a germicidal detergent in water. Scrub with brush. Clean exhalation valve
• Rinse , sanitize, air dry • Store in plastic bag in cabinet
SummaryItem to Inspect Possible Defects
Head band/neck strap Fray, loss elasticity
Facepiece Distorted, cracked
Valves Condition of rubber Improper seating
Cartridge Damaged, outdated
Recommendations
• Avoid respiratory use in solitary situations, when possible, have others nearby
• When using SAR’s and SCBA's it is MANDATORY to have standby or buddy
• If a respirator wearer is overcome, shows signs of suspect stress, remove individual from contaminated area (with protection)
Protection Factors
• Half face respirator• Full Face• Positive Pressure-Full
face• Positive Pressure- Full
face with airline
• 10x• 50x• 100x
• 1000x
Protection Factor
Concentration outside mask Concentration inside mask
10 = C outside divided by PEL
10 = C out divided by .2f/cc10 = X/.2 therefore 2f/cc is allowable in mask
8 hours/day x2 f/cc x 25,000 cc x 60 min/day= 2.4 million fibers (.2 PEL asbestos)
Protection Factors
Use conservative respirator selection
PF of 50 means you can be be exposed to an atmosphere concentration 50 times higher than the PEL
Canisters Expected PSU
Pre-filter ( P-100) for particulate on top and the yellow cartridge ( organic) bottom(closest to unit)
Covers pesticides,paints with oil mist,epoxies
Disposable Respirators
Use one with an Exhalation valve if possible
Use charcoal prefilter with nuisance organic for handling manure samples ( not for pit entry)suitable for painting ( PF 10 )
Examples are the 3M 8247 (nuisance organic with particulate