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Department of Biology GAS CYLINDER RISK ASSESSMENT FORM Activity title: Brief description: Location: Hazard Identification List gases and quantities stored Describe hazardous properties of gases (including any ‘Workplace Exposure Limits’ for toxic gases. Describe other hazards associated with gas cylinder use Who might be exposed to the hazards and how might harm occur? Consider: Types of workers No. of people Frequency of exposure Duration of exposure Possible system failure Page 1 of 4 Risk Control Measures: Is it practicable to ELIMINATE the designated materials or SUBSTITUTE them with less hazardous ones? Justify the need to use flammable /toxic gases if applicable Has external storage been considered and discounted? Is the size of gas cylinder appropriate for the work activity? Has / will the ‘system’ be designed and installed in accordance with a recognised code of practice? Consider the need for gas detection and automatic shut-off (e.g. hydrogen: fixed point hydrogen detection linked to an automatic shut-off valve to prevent the generation of an explosive atmosphere is considered a reasonable measure which must be used if hydrogen or similar gases are stored in buildings) Describe storage arrangements: Describe how cylinders will be transported: Is there a written procedure in place for the safe use of gases in place? Describe training to be provided to users: Does lone-working need to be avoided for this activity? What is the risk of an explosive atmosphere? Note: refer to risk matrix table in Appendix 1. The assessment should identify any area(s) where control of ignition sources is required. Page 2 of 4 Describe emergency arrangements in the event of leakage (note: refer to departmental guidance on ‘safe use of gas cylinders’): Describe any routine safety checks / testing required? Describe any protective equipment (e.g. safety glasses, gloves) that are necessary: Describe any other measures used to control risk: Are risks adequately controlled with the application of safe working systems and controls as outlined above?: Are any further reasonable measures still needed to control the risk to an acceptable level? Completed by: Name: Signed: Date: Supervisor: Name: Signed: Date: Reviewed: Name: Signed: Page 3 of 4 Date: APPENDIX 1 DANGEROUS SUBSTANCES EXPLOSIVE ATMOSHPERES REGULATIONS: RISK MATRIX DSEAR defines a ‘hazardous place’ as a place where an explosive atmosphere may occur in quantities that require special precautions to protect the health and safety of workers. 'Special precautions' means precautions to control potential ignition sources within the hazardous area, particularly in relation to construction, installation and use of equipment. No. 1 Likelihood 3 Extremely unlikely: could not occur from foreseeable incident Unlikely: could occur but only through unlikely events Likely 4 Very likely 5 Certain 2 Persistence Transient: a few seconds – 1 minute Low persistence: 1 – 15 minutes Persistent: 15 minutes – 1 hour Very persistent: hours Continuous Likelihood X Persistence = Likelihood 1 2 3 4 5 1 1 2 3 4 5 2 2 4 6 8 10 Persistence 3 3 6 9 12 15 4 4 8 12 16 20 Classification of Zones Non-hazardous zone Zone 2 Zone 1 Zone 0 A place in which an explosive atmosphere will not / very unlikely to occur in the normal operation but, if it does occur, will persist for short period only. N.B. Assigning places as ‘non-hazardous’ implies that no special precautions are required to control ignition sources. A place in which an explosive atmosphere consisting of a mixture with air of dangerous substances in the form of a gas, vapour or mist is not likely to occur in the normal operation but, if it does occur, will persist for a short period only. A place in which an explosive atmosphere consisting of a mixture with air of dangerous substances in the form of a gas, vapour or mist is likely to occur in normal operation occasionally. A place in which an explosive atmosphere consisting of a mixture with air of dangerous substances in the form of a gas, vapour or mist is present continuously or for long periods or frequently. Page 4 of 4 5 5 10 15 20 25