1. Materials for Teaching Agricultural Safety in the College Classroom
Hazardous Materials
A PowerPoint Presentation keyed to Chapter 9 of
Materials for Teaching Agricultural Safety
in the College Classroom
by Carol J. Lehtola, PhD, and Charles M. Brown
Book and more presentations in this series are available on the National Ag Safety Database,

2. Objectives
To identify and understand concepts of hazards related to hazardous materials
Hazardous Materials
Slide 9.1

3. Use Categories Application Mixing and Loading Transporting Storing
Handling
Equipment Maintenance
Disposal
Hazardous Materials
Slide 9.2

4. Pesticides Insecticides Herbicides Fungicides Rodenticides
Fumigants (gases for killing insects and other organisms in a confined space)
Hazardous Materials
Slide 9.3

5. Oral Inhalation Dermal Ocular
Routes of Entry
Oral
Inhalation
Dermal
Ocular
Hazardous Materials
Slide 9.4

6. Dermal Rates of Absorption
Rates Compared with the Forearm = 1.0
– Palm of hand 1.3
– Abdomen 2.1
– Scalp 3.7
– Forehead 4.2
– Ear canal 5.4
– Groin area 11.8
Hazardous Materials
Slide 9.5

7. Avoiding Exposure
Safety systems (closed handling, filtered cabs, etc.)
Personal protective equipment
Wash hands frequently
Discarding contaminated clothing
Hazardous Materials
Slide 9.6

8. Toxicity
Toxicity is a measure of the ability of a pesticide to cause harmful effects.
Factors affecting toxicity
– Type and amount of active ingredient, carrier or solvent, and inert contents
– Type of formulation
Hazardous Materials
Slide 9.7

9. Classes of Health Problems
Acute Effects
Delayed Effects
– Repeat exposures
– Single exposure but the reaction occurs later (flu-symptoms)
Chronic Effects
– Cancers
– Changes in genes or chromosomes
Hazardous Materials
Slide 9.8

10. Worker Protection Standard (WPS)
WPS is a set of regulations from the EPA designed to protect agricultural workers from pesticide exposure. It must be followed when pesticide use is part of the agricultural production of plants on a farm, nursery, or greenhouse.
Hazardous Materials
Slide 9.9

11. Know the Law!
The label is the law.
Hazardous Materials
Slide 9.10

12. Protect Yourself and Others
Hazardous Materials
Slide 9.11

13. Identify frequency Identify severity
Risk Assessment
Identify frequency
Identify severity
Hazardous Materials
Slide 9.12

14. Safety Hierarchy Eliminate hazard or risk during design
Apply safeguarding technology
Use warning signs
Train and instruct
Prescribe personal protective equipment (PPE)
Hazardous Materials
Slide 9.13

15. Correction Strategy Examples
Eliminate the source
Substitute a less hazardous equivalent
Remove person from hazard (robots, automation)
Isolate the hazard (barricades)
Dilute the hazard (ventilation)
Hazardous Materials
Slide 9.14

16. Resources AEM link for making your own signs
Farm/Agricultural/Rural Management Hazard Analysis Tool (HAT)
Hazardous Materials
Slide 9.15

17. Identify the hazards in the following series of slides.
Examples of Hazards
Identify the hazards in the following series of slides.
Hazardous Materials
Slide 9.16