2 Purpose of Presentation This is a guide to the management of hazardous substances in DECS worksites. It includes advice about:responsibilities of managers and employeespurchasingsafety information (ChemWatch and MSDSs)risk assessment and control optionslabellingstorage (classes of substances)disposalwhere to get further advice
3 Definition: Hazardous Substance A substance that has the potential to cause illness or injury as identified by the manufacturer or importer and is included on the The Australian Safety and Compensation Council (formally NOHSC) list of designated hazardous substances.
4 DECS Hazardous Substances Procedure provides direction to managers and employees for the development and implementation of safe systems of work in relation to the purchase, assessment, use, storage and disposal of designated hazardous substancesDownload Here
5 Duties of ManagersWorksite managers must develop and implement appropriate systems of work for the:purchaseusestoragedisposal………. of all substances
6 Duties of Employees Use non hazardous substances where possible Only use those hazardous substances on the approved substances listRefer to Guidelines for Ordering and Preparing to use SubstancesUse the substance in accordance with the risk assessment and appropriate control options
7 Information about substances The ChemWatch database contains information about a vast number of substancesChemWatch is available on CD-ROM from Health and Safety Services and OnlineChemWatch can assist in:Identifying hazardous substancesPrinting MSDSPrinting LabelsMaintaining registers and manifestsConducting risk assessments
9 Hazardous/Non Hazardous ChemWatch identifies the hazardous status of substances
10 Hazardous Substances Register Sites must maintain a register of all Hazardous Substances according to the OHS&W RegulationsAn example of a Hazardous Substances register template can be found on the OHS WebsiteHazardous Substances register must be readily accessibleMaterial Safety Data Sheets (MSDS) must be included in the register
11 Hazardous Substances Register Occupational Health, Safety and Welfare Regulations 19954.1.11—Hazardous substances registers (1) An employer must ensure that a register is kept and maintained for all hazardous substances used at the workplace. (2) The employer must ensure that the register includes— (a) a list of all hazardous substances used at the workplace; and (b) an MSDS for each hazardous substance (if an MSDS is required under these regulations). (3) The employer must ensure that the register is readily accessible to all employees who could be exposed to a hazardous substance. (4) Subregulations (1), (2) and (3) do not apply to a retailer or retail warehouse operator in relation to any hazardous substance which is intended for retail sale, which is supplied in a consumer package holding less than 30 kilograms or 30 litres of the substance and which is not intended to be opened on the premises of the retailer or operator.Click Here to Return
12 Material Safety Data Sheet (MSDS) MSDSs, available from supplier or ChemWatch, provide essential information describing:PropertiesSafe storageUsesHealth Hazard informationPrecautions for useSafe Handling informationProcedures for emergenciesDisposal
14 Risk Assessmentrisk assessments must be completed and control options implemented for all designated hazardous substancesrisk assessments for approved substances have been completed using ChemWatch and are available; see approved substances listrisk assessments must consider how the substance will be used, and by whom
15 Control OptionsPersonal Protective Equipment (PPE) is the last option in the Hierarchy of ControlsEnsure appropriate control measures are in place when handling hazardous substancesPPE should be provided by Site Managers and worn by employees when requiredIn special circumstances, information, instruction and training must be provided on the use and maintenance of PPE
16 Hierarchy of ControlsElimination (dispose of or do not purchase hazardous substances)Substitution (use a less hazardous substance)Engineering (eg: use substances in a fume cabinet/ open windows)Administration (maintain registers, training, labels, storage, disposal information)Personal Protective Equipment (safety glasses, aprons, gloves etc)Click Here to Return
17 Guidelinesfor Ordering and Preparing to use Substances from Hazardous Substances ProcedureDownload this document
18 LabellingAll containers holding substances must be correctly labelled according to the OHS&W RegulationsChemWatch can generate labels for all substancesLabel generated in ChemWatch
19 Labelling Occupational Health, Safety and Welfare Regulations 1995 4.1.10—Labels (1) An employer must ensure— (a) that any container which holds a hazardous substance used at work, including a container supplied to or produced within the workplace, is appropriately labelled; and (b) that a person does not remove, deface, modify or alter any such label. (2) Without limiting the operation of subregulation (1), an employer must ensure that a label— (a) clearly identifies the hazardous substance; and (b) provides basic health and safety information about the substance.Click Here to Return
20 Chemical StorageHazardous Substances must be kept in locked storage, with no unsupervised student accessStorage Areas to be clearly signedStorage of substances is based on the Dangerous Goods classificationClick here for detailed information on chemical storageClick here to continue
21 Storage and Dangerous Goods Substances are stored in accordance with the magnitude of the dangerous nature of the substanceDangerous goods classification is different from hazardous substance classification as it does not consider adverse effects from long term exposure Substances may be both a hazardous substance and a dangerous good, although this can be for differing properties of the substance
22 Dangerous Goods Exit classes Special segregated storage is required for the following Dangerous Goods Classes:Prescribed substances' under the Dangerous Goods Code are assigned a specific United Nations "UN" number and are divided into the following nine classes according to their predominant hazard:Class 1 - Explosives Class 2 - Gases (flammable, non-flammable, toxic) Class 3 - Flammable liquids Class 4 - Flammable solids, solids liable to spontaneous combustion, and substances that emit flammable gases when wet Class 5 - Oxidising substances (oxidising agents and organic peroxides) Class 6 - Toxic and infectious substances Class 7 - Radioactive material Class 8 - Corrosive substances Class 9 - Miscellaneous dangerous substances Subsidiary Risk - dangerous goods that pose more than the risk that is denoted by their class.Storage Considerations – what goes with what?Each class is identified by a distinctive coloured, diamond shaped labelExit classes
23 Class 1 - Explosives Should not be used or stored in schools. Class 1.1 – Explosives with a mass explosion hazard such as TNT, Gunpowder, Gelignite, etc.Class 1.2 – Explosives which are a projectile or fragmentation hazard, but not a significant mass explosion hazard eg. grenades, ammunition, etc.Class 1.3 – Explosives which are a fire and minor blast hazard, with minor projectile or minor fragmentation hazards.Class 1.4 – Explosives which are not a significant mass explosion hazard eg. flares, fireworks, safety cartridges, etc.Class 1.5 – Explosives with a mass explosion hazard, but are insensitive substances.Class 1.6 – Substances which are a minor explosion hazard, very insensitive substances.Index (back), Exit classes
24 (flammable, non-flammable, toxic) Class 2 - Gases(flammable, non-flammable, toxic)Completely gaseous at 20 degrees at Standard Temperature and PressureClass 2.1 – Gases that can ignite in air on contact with a source of ignition. The vapour/air density is usually greater than one, therefore many flammable gases will settle in low areas.Example: propane, butane, ethylene, acetylene and Liquid Petroleum Gas (LPG)Class 2.2 – Gases that are non flammable but may cause asphyxiation and/or represent stored energy hazard. Non flammable and non toxic gases are asphyxiants, diluting or replacing the oxygen content in the atmosphere.Example: compressed air, nitrogen, argon and carbon dioxide
25 (flammable, non-flammable, toxic) Class 2 - Gases(flammable, non-flammable, toxic)Completely gaseous at 20 degrees at Standard Temperature and PressureClass 2.3 – Gases likely to cause death or serious injury to human health if exposed or by skin contact. These gases are toxic or corrosive. Lingering and irritating odours often identify some but not all toxic gases.Example: ammonia and sulphur dioxide.See also Subsidiary Risk for special casesStorageStorage requirements for LPG is explained in Hazard Alert #7, L P Gas Tank and Cylinder Safety. More information on cylinder safety atIndex (back), Exit classes
26 Class 3 - Flammable liquids Liquids, the vapours of which can ignite in air on contact with a source of ignition. Liquids that can generate a vapour, forming a flammable mixture with air.The vapour can flash momentarily when an ignition source is present. This property of a flammable liquid is regarded as the flash point. Therefore this is the lowest temperature of a liquid which generates vapours to form a flammable mixture with air and can catch fire when a flame is applied.Examples of Class 3 substances:petrol, alcohols, thinners, solvents, lacquers and varnishes
27 Class 3 - Flammable liquids Store in an approved flammables cabinet (AS : The storage and handling of flammable and combustible liquids)Vent cabinet to the outside with forced extractionMax. storage 250 LitresCabinet to be placarded as flammablePratt Safety Flammables Cabinet model 5560 ASClass 3 is divided in the following way for packing/transport:Class 3 Packing Group I is Boiling Point <=35°C.Class 3 Packing Group II is Flash Point <=23°C, Boiling Point > 35°C.Class 3 Packing Group III is Flash Point > 23°C to <=61°C, Boiling Point >35°C.
28 Class 3 - Flammable liquids Fire Protection Requirements:At least one dry powder type fire extinguisher to be provided for each Flammables storage unitIndex (back), Exit classes
29 Class 4 - Flammable Solids Solid substances which are flammable in air and can sustain spontaneous combustion and emit flammable gases upon contact with water.Class 4.1 – Solids easily ignited eg. by sparks or flames, or liable to cause fire through friction.Example: red phosphorus, picric acid, hexamine, sulphur and naphthalene.Class 4.2 – Substances liable to spontaneously heat up and igniteExamples: activated carbon and white phosphorus.Class 4.3 – Substance which emits flammable or toxic gases when wetExamples: sodium and calcium carbide.Class 4.1 – Solids easily ignited eg. by sparks or flames, or liable to cause fire through friction.Class 4.2 – Substances liable to spontaneously heat up and ignite.Class 4.3 – Substance which emits flammable or toxic gases when wet.Class 4.1 – Solids easily ignited eg. by sparks or flames, or liable to cause fire through friction.Class 4.1 – Solids easily ignited eg. by sparks or flames, or liable to cause fire through friction.
30 Class 4 - Flammable Solids Solid substances which are flammable in air and can sustain spontaneous combustion and emit flammable gases upon contact with water.Storage:All Class 4 substances must be segregated from Classes 5.1 and 5.2Class 4.1 and 4.3: Store in segregated storage area, or with Class 3 substances (eg in Flammables storage unit). Signed “Class 4.1, 4.3: Flammable Solids”Class 4.2: Separate from all other classes in a designated cupboard lined with cement sheeting or similar flame proof material. Must be segregated from Classes 3, 4.1, 4.3, 5.1, 5.2. Signed “Class 4.2: Spontaneously Combustible”Index (back), Exit classesClass 4.1 – Solids easily ignited eg. by sparks or flames, or liable to cause fire through friction.Class 4.2 – Substances liable to spontaneously heat up and ignite.Class 4.3 – Substance which emits flammable or toxic gases when wet.Class 4.1 – Solids easily ignited eg. by sparks or flames, or liable to cause fire through friction.Class 4.1 – Solids easily ignited eg. by sparks or flames, or liable to cause fire through friction.
31 Class 5 – Oxidising substances (oxidising agents and organic peroxides)Oxygen is generally provided in a reactive form or is liberated to cause an oxidation process.Class 5.1 – Substances likely to increase the risk and intensity of fire in other materials (ie Contribute to the combustion of other materials).Examples: Hydrogen peroxide and ammonium nitrate, chlorates.
32 Class 5 – Oxidising substances (oxidising agents and organic peroxides) continuedOxygen is generally provided in a reactive form or is liberated to cause an oxidation process.Class Substances that are thermally unstable and likely to react dangerously with other substances. Substances with the ability to undergo exothermic self accelerating decomposition as the substance contains its own oxygen in the chemical structure.Decomposition of organic peroxides can lead to flammable and toxic gases being generated. Many organic peroxides also burn rapidly and are very sensitive to impact or friction.Examples: dibenzoyl peroxide and methyl ethyl ketone peroxide (MEKP)
33 Class 5 – Oxidising substances (oxidising agents and organic peroxides) continuedOxygen is generally provided in a reactive form or is liberated to cause an oxidation process.These substances are incompatible with other substances, particularly Flammables (solids and liquids), Corrosives. Flammable matter such as sawdust require segregated storage away from other materialsCLASS 5 STORAGE:Separate from all other classes in a designated cupboard, particularly from Classes 3, 4, and 8LockableCement sheet lined (eg “Hardiflex”)Signed (“Class 5: Oxidising Agents”)Index (back), Exit classes
34 Toxic and infectious substances Class 6Toxic and infectious substancesClass 6.1 – Toxic substances likely to cause death or severe injury to human or animal health if swallowed, inhaled or by skin contact.Examples: Calcium cyanide and lead arsenate.Class Infectious substances liable to cause death or severe injury to human or animal health if swallowed, inhaled or by skin contact.Substances containing disease yielding organisms and are not subject tothe regulations of the Australian Dangerous Goods Code. However, theyare incorporated in the Code if they are capable of spreading diseaseupon exposure.Stringent clothing and personal protective equipment controls are requiredwhen handling or in contact with these substances.Index (back), Exit classes
35 Class 7 - Radioactive material Class 7 – Substances (solid or liquid) which spontaneously emit ionising radiation. Category I, determined by radiation level of transport package. (Lowest level)Class 7 - Substances (solid or liquid) which spontaneously emit ionising radiation. Category II determined by radiation level of transport package.Class 7 – Substances (solid or liquid) which spontaneously emit ionising radiation. Category III determined by radiation level of transport packageNote: the approved radioactive sources in SA schools pose negligible risk. See OHS&W Science Manual for further advice on radioactive sources.Index (back), Exit classes
36 Class 8 - Corrosive substances Solids or liquids able to cause, to varying severity, damage to living tissue. Maybe either acidic or caustic in nature.Cause burns in contact with skin and eyes.Many form vapours that are harmful to respiratory system. Exposure can occur through breathing vapours.In the event of a leak, these substances also have the ability to damage or destroy goods and materials or cause other hazards.
37 Class 8 - Corrosive substances Examples:Zinc Chloride and soldering fluxes with Zinc ChlorideHydrochloric Acid (“Spirits of Salts”)Nitric AcidSulfuric Acid (battery acid)Sodium Hydroxide (caustic soda)Ammonia solution
38 Class 8 - Corrosive substances CLASS 8 STORAGE:LockableSigned (“Class 8: CORROSIVES”)Plastic laminate lined, stainless steel hinges and fittingsVented to the outside (ideally forced)Spillage tray in the bottomIndex (back), Exit classes
39 Miscellaneous dangerous substances Class 9Miscellaneous dangerous substancesSubstances and articles that present a danger especially during transport, not covered by other dangerous goods classes.Class 9 substances have separate storage and transport requirements.Examples: dry ice and asbestos. NB - Aerosols are no longer Class 9 dangerous goods. They are Class 2.1 or 2.2 (gases) depending on flammability.Index (back), Exit classes
40 Subsidiary Riskdangerous goods that pose more than the risk that is denoted by their classSubsidiary risk categories are assigned to dangerous goods that pose more than the risk that is denoted by their class. The may also be referred to as the secondary risk or subrisk. The subsidiary risk label is represented as the normal label with the number deleted.Example: Special CaseOxygen, nitrous oxide Class 2.2 Subsidiary Risk Class 5.1Index (back), Exit classes
41 Storage Considerations Some classes of chemicals must be segregated from other classes because of their reaction potential with other chemical classes.Flammable substances must be segregated (Classes 3, 4.1 and 4.3)Spontaneous Combustibles must be segregated (Class 4.2)Oxidisers must be segregated (Class 5)Corrosives must be segregated (Class 8)(see individual Class slides for more details on storage)Index (back), Exit classes
42 Subsidiary RiskDo not dispose of any hazardous substances in general rubbish binsEnsure compliance with requirements on MSDS and labelsUse the DECS bulk hazardous substances pickup when programmedContact your local council for informationIn an emergency spill situation, contact the MFS or CFS and inform Health & Safety Services
43 TrainingOHS&W Regulations (1995) require Site Managers to provide training for all staff using hazardous substances
44 Training Occupational Health, Safety and Welfare Regulations 1995 4.1.14—Instruction and training (1) An employer must provide instruction and training in accordance with this regulation to any employee who could be exposed to hazardous substances in the workplace. (2) The instruction and training must be commensurate with any risk to health caused by a hazardous substance that has been identified by the assessment process referred to in regulation (3) The instruction and training must be provided in a manner that is appropriate to the employees in the workplace. (4) The employer must keep a record of any instruction and training provided under this regulation.Click Here to Return
45 Codes of PracticeApproved codes of practice under the OHS&W Act relevant to the use of hazardous substances include:Code of Practice for the Control of Workplace Hazardous SubstancesCode of Practice for the Preparation of Material Safety Data SheetsCode of Practice for the Labelling of Workplace Substances
46 Codes of Practice cont See Also: Code of Practice for the Safe Use of Ionizing Radiation in Secondary SchoolsCode of Practice for the Safe Removal of AsbestosCode of Practice for Asbestos WorkCode of Practice for the Safe Use of Synthetic Mineral FibresMore are available from
47 What do I need to do if I want to use a substance? Check if the substance is hazardous or non-hazardous (use ChemWatch)If non-hazardous, proceed with purchase and follow safety info on labelIf hazardous, check Approved Substances List (or seek non-hazardous alternative)If substance is not on list, do not proceed with purchase, seek non-hazardous alternative
48 Summary Hazardous substances must be identified Risk assessments must be completedControl options must be in place for all substances:Training (including safe work practices)Purchasing proceduresDisposalEngineering and Substitution consideredLabellingRegisters & StoragePersonal protective equipment (PPE)
49 Need More information? Health & Safety Services – 8226 1440 Hazardous Substances section of the OHSW Website (this site includes information on using ChemWatch)Hazardous Substances ProcedureSafeWork SAWorkCover WebsiteHealth & Safety Services –
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