Post on 31-Mar-2015
Respirator Selection based on OSHA APFs
Scott Shinn, CIH, Technical Service Specialist, 3M Company
AGENDA
• Types of Respiratory Protection• Definitions• Respirator Selection Process• Examples of Acceptable Respiratory
Protection
Respiratory Protection
• Air Purifying Respirator– Negative Pressure Respirator
Respiratory Protection
• Air Purifying Respirator– Powered Air Purifying Respirator (PAPR)
Definitions
• Assigned Protection Factor (APF)– the workplace level of respiratory
protection that a respirator or class of respirators is expected to provide to employees when the employer implements a continuing, effective respiratory protection program.
Definitions
• Maximum Use Concentration (MUC)– the maximum atmospheric concentration
of a hazardous substance from which an employee can be expected to be protected when wearing a respirator, and is determined by the APF of the respirator and the exposure limit of the hazardous substance. (APF X OEL)
OEL = Occupational
Exposure Limit
Definitions
• Immediately Dangerous to Life or Health (IDLH)– an atmosphere that poses an immediate
threat to life, would cause irreversible adverse health effects, or would impair an individual's ability to escape from a dangerous atmosphere.
Respiratory Protection Program
• Per 29 CFR 1910.134 Written Respiratory Protection Program must include…– Procedures for selecting respirators– Medical evaluation– Fit testing– Use of respirators– Maintenance and care of respirators– Breathing air quality and use– Training– Program evaluation– Recordkeeping
Respirator Selection Process
• Exposure Assessment– Typically determined through air monitoring
• Determine APF Required– Concentration in Air ÷ OEL (C/OEL)
• APF Table• Other Considerations
Assigned Protection Factors
Assigned Protection Factors for the Revised Respiratory Protection Standard, OSHA 3352-02 2009
Original Illustrations created by Attiliis & Associates
Assigned Protection Factors
APF=1000 if manufacture has documentation
Assigned Protection Factors for the Revised Respiratory Protection Standard, OSHA 3352-02 2009 Original Illustrations created by Attiliis & Associates
Assigned Protection Factors
Also includes hooded supplied air respirator
APF=1000 if manufacturer has documentation
Assigned Protection Factors for the Revised Respiratory Protection Standard, OSHA 3352-02 2009
Original Illustrations created by Attiliis & Associates
Assigned Protection Factors
Assigned Protection Factors for the Revised Respiratory Protection Standard, OSHA 3352-02 2009
Original Illustrations created by Attiliis & Associates
Example 1: Styrene OEL = 50 ppm
(1) Manufacturer must demonstrate protection factor of 1000
Exposure Respiratory Protection
≤ 500 ppm Half Facepiece with OV CartridgeAny other organic vapor or supplied air respirator with an APF ≥ 10
> 500 ppm to ≤ 1250 ppm
PAPR with OV Cartridge and Hood/Helmet, or Loose Fitting FacepieceContinuous flow supplied-air system with Hood/Helmet, or Loose Fitting FacepieceAny other organic vapor or supplied air respirator with an APF ≥ 25
> 1250 ppm to ≤ 2500 ppm
Full Facepiece with OV CartridgeAny other organic vapor or supplied air respirator with an APF ≥ 50
> 2500 ppm to < 5000 ppm
PAPR with OV Cartridge and Full Facepiece or Hood/Helmet(1)
Continuous flow supplied-air system with Full Facepiece or Hood/Helmet(1)
≤ 5000 ppm (IDLH) SCBA
Voluntary TWA-OEL for Styrene Industry
Example 2: Styrene OEL = 20 ppm
(1) Manufacturer must demonstrate protection factor of 1000
Exposure Respiratory Protection
≤ 200 ppm Half Facepiece with OV CartridgeAny other organic vapor or supplied air respirator with an APF ≥ 10
> 200 ppm to ≤ 500 ppm PAPR with OV Cartridge and Hood/Helmet, or Loose Fitting FacepieceContinuous flow supplied-air system with Hood/Helmet, or Loose Fitting FacepieceAny other organic vapor or supplied air respirator with an APF ≥ 25
> 500 ppm to ≤ 1000 ppm
Full Facepiece with OV CartridgeAny other organic vapor or supplied air respirator with an APF ≥ 50
> 1000 ppm to < 5000 ppm
PAPR with OV Cartridge and Full Facepiece or Hood/Helmet(1)
Continuous flow supplied-air system with Full Facepiece or Hood/Helmet(1)
≤ 5000 ppm (IDLH) SCBA
ACGIH TLV-TWA for Styrene