1. Introduction to INDUSTRIAL HYGIENE

2. Industrial Hygiene
“that science or art devoted to the anticipation, recognition, evaluation, and control of those environmental factors or stresses, arising in or from the workplace, that may cause sickness, impaired health and well-being, or significant discomfort and inefficiency among workers”

3. OSH Act of 1970 The purpose of the OSH Act is to
“assure so far as possible every working,
man and woman in the nation safe and
healthful working conditions and to
preserve our human resources.”

4. Environmental Factors or Stresses
Chemical hazards
gases, vapors, dusts, fumes, mists, and smoke
Physical hazards
non-ionizing and ionizing radiation, noise, vibration, extreme temperatures and pressures

5. Environmental Factors or Stresses
Ergonomic hazards
workstation design, repetitive motion, improper lifting/reaching, poor visual conditions
Biological hazards
insects, mold, yeast, fungi, bacteria, and viruses

6. Routes of Entry Inhalation Absorption Ingestion airborne contaminants
penetration through the skin
Ingestion
eating
drinking

7. OSHA Hierarchy of Control
Engineering controls
Work practice controls
Administrative controls
Personal protective equipment (PPE)

8. Types of Exposure Acute Chronic
Short term period between exposure and onset of symptoms
Chronic
Long time period between exposure to an agent and the onset of symptoms

9. Types of Air Contaminants
Particulates
dusts, fumes, mists, and fibers
non respirable particles
> 10 m in diameter
respirable particles
< 10 m in diameter

10. Types of Air Contaminants
Fumes
volatilized solids condenses in cool air
< 1.0 m in diameter
hot vapor + air (reaction with) = oxide
Mists
suspended solid droplets
generated by a condensation of liquids from a vapors to a liquid state

11. Types of Air Contaminants
Fibers
solid, slender, elongated structures
length several times the diameter
Gases
formless fluids that expand to occupy a space
arc-welding, internal combustion engine exhaust air
Vapors
liquid changed to vapor
organic solvents

12. Exposure Limits Air Contaminants
OSHA
Occupational Safety and Health Administration
NIOSH
National Institute of Occupational Safety and Health
ACGIH
American Conference of Governmental Industrial Hygienists

13. Exposure Limits Air Contaminants
OSHA
PEL
permissible exposure limit
NIOSH
REL
recommended exposure level
ACGIH
TLV
threshold limit value

14. Hearing Conservation Program
Mandatory
at an 8-hour TWA > 85 dBA
Exposure monitoring
Audiometric testing
Hearing protection
Employee training
Recordkeeping

15. Bloodborne Pathogens Bloodborne pathogens include 29 CFR 1910.1030
Hepatitis B
HIV
Others
29 CFR
describes actions employers must take to reduce risk of exposure in the workplace

16. Industrial Hygiene
ANTICIPATION
RECOGNITION
EVALUTION
CONTROL

17. Consultation Assistance
For Industrial Hygiene help, contact The Office of Safety & Health Consultation at (302) Or
Click on the Consultant staff link on the Main Page to a Consultant.