Risk assessments and hazards

1. Risk assessmentsand hazards www.abpischools.org.uk

2. Risk Assessments Hazard: • something with the potential to cause harm Risk: • the likelihood and the consequences of that hazard happening

3. Magnitude of hazard or risk Hazard Risk High Medium Low Situation 1 2 3 4 5 Risk Assessments Crossing the road A moving car is a hazard. The consequence is that it could kill you. 1. The risk is very high if you stand in the middle of a motorway and the car is travelling at 70 mph.

4. Magnitude of hazard or risk Hazard Risk High Medium Low Situation 1 2 3 4 5 Risk Assessments Crossing the road A moving car is a hazard. The consequence is that it could kill you. 2. The risk is low if you are on the pavement of a quiet cul-de-sac and the car is moving very slowly.

5. Magnitude of hazard or risk Hazard Risk High Medium Low Situation 1 2 3 4 5 Risk Assessments Crossing the road A moving car is a hazard. The consequence is that it could kill you. 3. On an urban high street the risk is high if the car is travelling over the speed limit and you cross the road without looking.

6. Magnitude of hazard or risk Hazard Risk High Medium Low Situation 1 2 3 4 5 Risk Assessments Crossing the road A moving car is a hazard. The consequence is that it could kill you. 4. The risk is medium if the driver is observing the speed limit and you run across its path estimating a safe gap.

7. Magnitude of hazard or risk Hazard Risk High Medium Low Situation 1 2 3 4 5 Risk Assessments Crossing the road A moving car is a hazard. The consequence is that it could kill you. 5. The risk is low if the car is travelling slowly and you cross well before it using a pedestrian crossing.

8. Magnitude of hazard or risk Hazard Risk High Medium Low Situation 1 2 3 4 5 Risk Assessments Crossing the road A moving car is a hazard. The consequence is that it could kill you. 1. The risk is very high if you stand in the middle of a motorway and the car is travelling at 70 mph. 2. The risk is low if you are on the pavement of a quiet cul-de-sac and the car is moving very slowly. 3. On an urban high street the risk is high if the car is travelling over the speed limit and you cross the road without looking. 4. The risk is medium if the driver is observing the speed limit and you run across its path estimating a safe gap. 5. The risk is low if the car is travelling slowly and you cross well before it using a pedestrian crossing.

9. Risk Assessments One way to create a risk assessment is to break down any experiment or activity into its parts and identify the hazards associated with each. For example, think about boiling an egg for breakfast. The component parts include: Select the egg Boil the egg in water for 4 minutes Remove the egg from the water Cut the top off the egg Two of these could lead to death !

14. Write a risk assessment for the synthesis and isolation of the fertiliser ammonium sulphate by neutralising sulphuric acid with ammonia using the following procedure. Measure out sulphuric acid (50ml) into a flask. Use methyl orange indicator and titrate with aqueous ammonia solution from a burette. Repeat the process without the indicator using the same volumes from the trial run. Boil or evaporate off the water to give a solid product. You will need to look at hazard data from CLEAPSS (CD-ROM or on a school network) or a chemical supplier’s catalogue.

21. The safety of a workplace is increased by the presence of safety signs. There are standards for sign design so that everyone recognises them easily. International symbols will replace the current European symbols by 2015, they have similar meanings Match the symbols on the next slide to their meanings

22. Toxic 1 Irritant 2 3 Flammable 4 Oxidising 5 Dangerous for the environment Corrosive 6 Corrosive

23. Toxic 1 Irritant 2 3 Flammable 4 Oxidising 5 Dangerous for the environment Corrosive 6 Corrosive