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Air Contaminants

Air contaminants, including dusts, mists, fumes, vapors, and gases, pose health risks in occupational settings. OSHA's Permissible Exposure Limits (PELs) establish ceiling values and 8-hour time-weighted averages for safe exposure. Monitoring air quality involves surveying protocols to determine where and how to sample, and includes various methods such as direct reading instruments and dosimeters. Control measures, including engineering solutions, administrative adjustments, and personal protective equipment (PPE), are essential to minimize exposure and ensure worker safety.

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Air Contaminants

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  1. Air Contaminants

  2. Air contaminants are: • Dusts • Mists • Fumes • Vapors • Gases 1a

  3. OSHA's Permissible Exposure Limits (PELs): • Ceiling Values • 8-Hour Time Weighted Averages • Acceptable Ceiling Concentrations 2a

  4. OSHA's Permissible Exposure Limits (PELs): • Acceptable Maximum Peak Above the Acceptable Ceiling Concentrations • Skin Designation • Reference to another OSHA standard 2b

  5. PELs are given in: • ppm • mg/m3 • Mppcf 2c

  6. Air monitoring survey protocols • Purpose of survey • Where to sample • What to sample 3a

  7. Air monitoring survey protocols • Who to sample • Number of samples • Collection and analysis 3b

  8. Sampling methods • Direct reading instruments • Grab samples • Passive dosimeters • Active dosimeters • Other 3c

  9. Determining exposures E = (Ca x Ta + Cb x Tb + . . . Cn x Tn) 8 • E is the equivalent exposure • C is the concentration of contaminant • T is the duration of exposure 4a

  10. Control measures • Engineering • Administrative • PPE 5a

  11. Engineering controls • Ventilation • Equipment design 5b

  12. Administrative controls • Substitution • Procedures for use • Scheduling 5c

  13. PPE • Respirators • Gloves • Eye and face protection • Chemical-resistant clothing 5d

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