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Induction Seminar for New Laboratory Technicians

Induction Seminar for New Laboratory Technicians. Mr W C HO 30/9/06. Risk Assessment. An analysis of a practical activity to identify hazards and to take precautions to minimise the risk Procedures: Identifying hazards (Materials / Procedures / Equipment)

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Induction Seminar for New Laboratory Technicians

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  1. Induction Seminar for New Laboratory Technicians Mr W C HO 30/9/06

  2. Risk Assessment • An analysis of a practical activity to identify hazards and to take precautions to minimise the risk • Procedures: • Identifying hazards (Materials / Procedures / Equipment) • Assessing how likely the hazard will actually cause harm (risk) • Deciding what control measures to reduce risk to acceptable level • Finding how to dispose of hazardous residues • Review

  3. Procurement and Management of Laboratory Equipment/Chemicals Record Keeping Acquisition Write-off / Disposal Storing / Organising

  4. Composite Furniture & Equipment Grant • Replace recurrent and non-recurrent F&E grants for aided schools • Greater flexibility in the use of resources • Expenditure incurred should be reasonable and necessary for educational purposes • Cover the costs and maintenance/repair fees for F/E items, insurance premium for non-standard F&E items • $13,690 per class for 2006/07 • EMBCM150/2006; EMB Circular 2/2001A • http://www.emb.gov.hk/oebg-e

  5. Science Subject Grants http://www.emb.gov.hk • For purchase of consumables • EMBCM150/2006 • Aided Schools • Operating Expenses Block Grant(資助學校營辦開支整筆津貼) • Adm. Cir. 27/2000 • S1-3 Science, AL Biology and ASL/AL Chemistry • Govt. Schools • Subject & Curriculum Block Grant(官立學校科目及課程整筆津貼) • Finance Cir. 2/2000

  6. Reference Lists of F/E • Consider whether item is safe before purchase (e.g. chemicals, electrical equipment, plants & animals) • Specifications of the EMB Reference List of F&E • http://www.emb.gov.hk

  7. Thermometer • Digital thermometer • No-roll thermometer sleeve • Break-safe thermometer (encased in a PVC coating, 10-100oC) • Low toxicity non-mercury filled thermometer, max 110 / 330oC

  8. Thermometer Holder • clips onto the rim of a beaker or other vessel to hold a thermometer vertically near the side of the container

  9. Hand Protector 隔熱護手墊

  10. Heating Device • Alternative to Bunsen burner or heating mantle • Aluminium heating block (~$100) • Commercial heating device

  11. Plasticware • Reduce breakage of glassware • Plasticware (e.g. dropper, beaker, funnel, measuring cylinder) • Polypropylene, polymethylpentene (TPX))

  12. Microscale Chemistry Equipment Pipette多用滴管 Well-plate孔井穴板 Microspatular Glass Combustion tube Universal Indicator Chart

  13. Microscale Version Pins Shampoo Solution 0.4 M NaOH

  14. Reduction of CuO Microburner 5M HCl Galvanizediron coil

  15. Reactions of Chlorine NaCl Bleach + HCl KI KBr

  16. Microscale Chemistry Equipment Distillation cap Set up for distillation Set up for reflux http://www.mcl.hk

  17. Asbestos • Naturally occurring fibrous silicate minerals • May cause lung cancer, mesothelioma (間皮瘤) & abestosis (石棉沉著病) • Asbestos-containing products should not be used in schools • Beware of equipment with heat insulating materials e.g. wire gauzes, bench mats, ovens • Bench mats should be made of glass reinforced cement. Wire gauzes should be with ceramic centres. • Add “Asbestos free” requirement when purchasing • Do not dispose of asbestos-containing products as common garbage

  18. Procurement of Chemicals • Before purchase, assess the hazardous nature of chemicals, check your inventory, whether it will be used in experiments in the near future • Acquire safer alternatives e.g. Volasil 244 instead of CCl4 • Avoid over-stocking of chemicals • Keep quantities to a minimal especially for water-reactive chemicals e.g. Na, K, Ca2C, SiCl4, hazardous chemicals e.g. Br2 (ampoule package), conc. acids and alkalis and flammable chemicals e.g. P, ether, ethanol, etc • Clearly labelled and date-stamped the date of arrival • Keep a clear and updated record of chemical stocks (locations)

  19. Safer Alternatives to chlorinated hydrocarbons • Displacement reactions of halogens • Cyclohexane or Volasil 244 (octamethylcyclotetrasiloxane, (CH3)8Si4O4) • Less dense than water, they form an upper layer • Cyclohexane is much less expensive than Volasil 244. The collected waste can be treated with 1 M sodium carbonate solution before recycling or disposal.

  20. Safety Information of Chemicals International Chemical Safety Cards http://www.ilo.org/public/english/protection/safework/cis/products/icsc/ Scottish Schools Equipment Research Centrehttp://www.sserc.org.uk

  21. CLEAPSShttp://www.cleapss.org.uk

  22. ChemLabels CD-ROM • http://www.merck.de/english/services/chemdat/english/index.htm • http://www.sigmaaldrich.com

  23. Controlled Chemicals • Prevent diversion of chemicals to illicit (非法) manufacture of narcotic drugs or psychotropic substances e.g. heroin (海洛英) • Control of Chemicals Ordinance (Cap. 145) • Acetylating Substances • Ethanoyl chloride (乙酰氯), ethanoic anhydride (乙酰酐) • Licence • Potassium Permanganate (高錳酸鉀) • Storage approval • List of Controlled Chemicals (Customs & Excise Dept, Tel. 2541 4383)

  24. Chemical Weapon Precursors • List of chemical weapon precursors controlled under the Import and Export Ordinance (Annex A of STCC No.16/04) • http://www.stc.tid.gov.hk/english/circular_pub/stc16_04.html • Items under the control lists of two international control regimes - the Australia Group which aims to minimize the risk of chemical and biological weapons proliferation; and the Chemical Weapons Convention which aims to prohibit the development, production, stockpiling and use of chemical weapons and on their destruction. • Schools wishing to purchase chemicals e.g. NaF, KF flouride, PCl3 or PCl5 for expts should first sign an undertaking. By doing so, TID can trace the location of the chemicals and how they are used. No fee would be required. • Trade and Industry Department 工 業 貿 易 署 Enquiry tel.: 2398 5625

  25. Other Issues • Obtain animals e.g. healthy rats for dissection from licensed animal traders (registered with AFCD, Tel. 2150 6645) or the University Animal Units • Plant materials may contain irritants • 3-pin adaptors and extension units comply with safety standard (BS546 or BS 1363) • Class II laser (< 1 mW) • 2,4,6-Trinitrophenol (Picric Acid 苦味酸)

  26. Flammable Liquid Cabinets • constructed from 20 swg zinc coated steel with welded seams • door front built with an integral lip to assist in providing a vapour seal with the doors • doors have reinforced vertical panels and continuous hinge to prevent distortion due to heat under fire condition • all internal and external metal surfaces finished in textured high quality stove enamel which will not emit toxic fume during fire conditions • label “DANGER flammable materials” and symbol

  27. Acid Storage Cabinet • Constructed from 20 swg zinc coated steel with welded seams • Door fronts with dia. 30 mm plastic ventilation cap • doors have reinforced vertical panels and continuous hinge to prevent distortion due to heat under fire condition • Finished in white polyester powder coating giving a surface which is resistant to most acids and alkalis

  28. Organising and Storing

  29. Semi-open Storage/retrieval System • Not uncommon for teacher go in and out of prep. room to fetch things that s/he wants for further experiment, or to replace an item • Allows ‘self-service’ by teachers • Cupboards with glass doors • General items • Plastic trays as standard containers • Transparent plastic boxes • Automatic self-checking system – facilitates checking and counting of items returned by students • A system of locating equipment – location code and a plan

  30. General Storage Cupboards • Glass-fronted cupboards • Advantages • Ease of seeing what is stored • Ease of locating missing bottles • Visibility of deteriorating stock • Disadvantages • Need for frequent cleaning of glass • Effect of sunlight on the chemicals • UV causing embrittlement of the plastic used for many chemical bottles

  31. Labelling • Using card case for labelling storage cabinets – easy update

  32. Storage cabinet • Facilitate self-service by teachers and students Safety Spectacles

  33. Transparent plastic boxes • boxes of different sizes are available inexpensively

  34. General Items • A neat and convenient way of keeping connecting leads

  35. Plastic trays as standard containers • Trolley with trays

  36. Record Keeping • MS Excel • Inventory program available at http://hklta.org.hk/

  37. Using MS Access for Inventory • Database, table, query, form, report

  38. Commercial Inventory Program • Master program (~$3000) • Optional items • User program (~$2000 per user) access to master database through LAN • Bar code scanner • Label printer • Data collector for stock taking

  39. Writing Off Equipment (1) • To free up storage space • For aided schools: • prepare a destruction certificate • endorse by the school head under witness by a senior teacher • certificate should be kept in school for record purpose

  40. Writing Off Equipment (2) For government schools: • Departmental Controlled Stores • list of Unserviceable DCS for Disposal (G.F.277) • approve by school head and retained for future audit inspection • Inventory Stores • list of Materials for Condemnation as Unserviceable (G.F.233) • certify by relevant panel teacher(s) as the Member of Board of Condemnation • submit to Senior Supplies Officer (EMB)

  41. Fixtures

  42. Major Repair Estimates • For aided schools • Non-recurrent • For repair work of laboratory fixture costing $8,000 or more • Approval depends on recommendations by ASD / Housing Dept / EMB & the availability of fund • EMBCM091/2006 (around May each year)

  43. Major Repair DilutionTank CatchpotRecoveryTrap

  44. Island Bench • Leg room

  45. Fume Cupboard Drip Cup Remote Control Wired or Tempered Glass Air Foil Proprietary type (UK Building Bulletin 88)

  46. Exhaust ducts Weather Cap Outlet of Exhaust duct

  47. Measuring Face Velocity Anemometer Regular checking, Test Report

  48. Emergency Repair of Lab Fixtures • For emergency situations (eg breakdown of fume cupboard fan) costing $8,000 - $200,000 • Standard Request Form to ASD or Housing Dept with a copy to REO • Adm. Cir. 57/1999

  49. Fume Cupboard Pulley counterweight system of the sash door

  50. Safety and Laboratory Facilities • Building Bulletin 80 – Science Accommodation in Secondary Schools: A Design Guide. http://eric.ed.gov • L14 Designing and Planning Laboratories, CLEAPSS • Science Facilities Standards (Texas) http://www.utdanacenter.org/sciencetoolkit/safety/

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