USDAUSDA 10/29/9810/29/98 3333

Respiratory ProtectionRespiratory ProtectionNAA Respiratory ProtectionProgram 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

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

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

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