Biological and Chemical

BIOLOGICAL AND CHEMICAL HAZARDS

GRADE 11 A lesson in working life for students in Ontario Secondary Schools

Biological and Chemical Hazards OH

WHMIS Necessities 1. Inventory 2. Labels in place 3. Material Safety Data Sheets available 4. Training 5. Required Personal Protective Equipment (PPE) available

Biological and Chemical Hazards OH 1

Inventory

• Lists chemicals present in the workplace • States whether they have a supplier label or a workplace label Biological and Chemical Hazards OH 2

WHMIS Exemptions

Consumer products Food and drugs Pest control products


Supplier Label


Workplace Label

Gasoline Flammable Liquid Keep away from ignition sources FOR ADDITIONAL INFORMATION REFER TO MATERIAL SAFETY DATA SHEET


MSDS (Material Safety Data Sheet)


MSDS Categories 1. Product identification 2. Hazardous ingredients 3. Physical data 4. Fire and explosion data 5. Reactivity data 6. Toxicological properties 7. Preventative measures 8. Emergency and first aid measures 9. Preparation information Biological and Chemical Hazards OH 7

Routes of Exposure

1. Inhalation 2. Absorption 3. Ingestion 4. Injection


Inhalation Symptoms: • Sore or burning throat • Itchy or watery eyes

Precautions: • Respirator • Dust mask • Ventilation


Inhalation Protection: Respirator


Inhalation Protection: Dust Mask


Inhalation Protection: Fume Hood


Absorption Symptoms: • Itching, burning skin • Swollen, puffy, watery eyes

Precautions: • Hand and arm protection • Impervious gloves • Eye protection • Bandages over cuts


Hand, Arm and Eye Protection


Impervious Clothing

Chemical and Biological Hazards OH 15

Ingestion Symptoms: • Burning throat • Stomach pain • Nausea, vomiting

Safety precautions: • Handwashing • No smoking, eating at workstations


Injection

Safety Precautions: • Safe handling of sharps • Proper disposal • Hand protection


The Right PPE

✔ Follow the manufacturer’s instructions ✔ No new hazards ✔ No interferences


What Makes a Fire? Fire Tetrahedron • Fuel • Oxygen • Temperature • Chemical/Chain Reaction

Take away any of the above and the fire will stop!


Common Compressed Gases

Gas

Use

Acetylene

Welding

Nitrous oxide

Dentistry, medical

Propane

Barbecue fuel


Compressed Gases WHMIS symbol


Sean Kells


Bonding and Grounding


Infectious Biological Agents Biological Hazard WHMIS Symbol


Who’s at Risk?


Inhalation


Ingestion


Injection


Absorption


Disease Control

To prevent the spread of disease and protect yourself: • Wash • Cover up • Disinfect • Sterilize


Handwashing Tips


Cover Up

• Cover cuts • Cover your mouth • Cover your skin • Cover your hair


Sterilization

ETO Sterilizer Biological and Chemical Hazards OH 33

Handling Food

• Use proper handwashing techniques • Store foods promptly • Keep raw and cooked foods separate • Keep preparation surfaces and utensils clean to avoid cross-contamination Biological and Chemical Hazards OH 34

Handling People

Universal Precautions: • Handwashing • Use Personal Protective Equipment


Handling Infants

• Disinfect bottles • Wash hands • Vaccination


Hazards in Agriculture and Landscaping

Chemical Hazards • Fertilizers • Pesticides

Biological Hazards • Fungi • Grain dust • Animal wastes Biological and Chemical Hazards OH 37

BIOLOGICAL and CHEMICAL HAZARDS

GRADE 12 A lesson in working life for students in Ontario Secondary Schools

Biological and Chemical Hazards OH

Hazards in Science

• Chemicals • Compressed gases • Moulds and bacteria • Contagious people Biological and Chemical Hazards OH 38

Assessing Biological Hazards Modes of transmission • Direct • Indirect – Vehicle-borne – Vector-borne – Airborne


Assessing Chemical Hazards • Properties – Read the MSDS – Flammable vs combustible liquids

• Intended use – Confined space vs outdoors – With or without other chemicals Biological and Chemical Hazards OH 40

Engineering Controls

• Isolation • Proper Storage • Ventilation


Work Practices: Universal Precautions ✔ Proper gloves ✔ Cover cuts ✔ Wash hands ✔ Proper handling and disposing of sharps, needles ✔ Medical assistance ✔ Contact supervisor


Personal Protective Equipment • Gloves, safety glasses, respirators, masks, impervious clothing • “Last line of defence” • Must fit properly


Latex Allergies • See your doctor • Tell your employer • Substitute


Controlling Hazards

• Disinfection • Handwashing • Personal Protective Equipment • Training


Hazards in Hairstyling and Aesthetics

• Diseases and skin infections i.e. folliculitis • Chemicals in dyes, perm solutions, nail polish remover and nail adhesives Biological and Chemical Hazards OH 46

Before you start work

RECOGNIZE ASSESS CONTROL


Injection

• Needlestick injuries • Cuts from handling broken glass or other sharp objects


Welding Safety

• Wear required PPE • Special training required for welding in confined spaces • Secure gas cylinders • Test the atmosphere Biological and Chemical Hazards OH 49

Hazards in Construction

• Dust • Paints and solvents • Fuels, compressed gases • Lime in concrete • Fibreglass or asbestos fibres Biological and Chemical Hazards OH 50

Asbestos
