# Presentation: 694616

## NAA Respiratory 

- NAA Respiratory
- Protection
- Program and Training

## On line Info

- http://www.osha.gov/html/respirator.html

## 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

- Hoods
- ventilation
- spray
- booths

- SOPS
- Substitution
- Shift Change
- Training

- Use respirator
- Medical 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

## Powered Air Purifying Respirator“PAPR”

## Hooded PAPR

- Good for Beards
- Eye Glass Users
- Comfort in heat
- Patient Care

## Half Face Respirator

## Full Face Respirator

## 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

## Summary

*Item 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/cc
- 10 = 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

## Slide 39