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CHEMICAL SAFETY LEVELS FOR SCHOOL LABORATORIES

CHEMICAL SAFETY LEVELS FOR SCHOOL LABORATORIES. A SYSTEM FOR IDENTIFYING RISKS UPON ENTERING A LAB. CLASSIFICATION OF LABS. CSL PROPOSED AS A GUIDELINE TO ASSIST CHO AND STAFF CSL DETERMINED BY: RISK OF EXPOSURE TO HAZARDOUS CHEMICALS FACILITY SURVEY TYPES OF PROCEDURES BEING USED.

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CHEMICAL SAFETY LEVELS FOR SCHOOL LABORATORIES

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  1. CHEMICAL SAFETY LEVELS FOR SCHOOL LABORATORIES A SYSTEM FOR IDENTIFYING RISKS UPON ENTERING A LAB

  2. CLASSIFICATION OF LABS • CSL PROPOSED AS A GUIDELINE TO ASSIST CHO AND STAFF • CSL DETERMINED BY: • RISK OF EXPOSURE TO HAZARDOUS CHEMICALS • FACILITY SURVEY • TYPES OF PROCEDURES BEING USED

  3. CLASSIFICATION OF LABS • DESIGNATION BASED ON: • HAZARDS OF CHEMICALS BEING USED • TOXICITY • FLAMABIITY • REACTIVITY • TOXICITY • NATURE OF THE WORK OR PROCESSES BEING USED

  4. CLASSIFICATION OF LABS • DESIGNATION DETERMINED BY CHO AND DEPARTMENT CHAIR • DESIGNATION CRITERIA • SAFETY EQUIPMENT AVAILABLE • EYE WASH • DELUGE SHOWER • FUME HOOD • PURGE FAN • PERSONAL PROTECTION EQUIPMENT

  5. CLASSIFICATION OF LABS • DESIGNATION CRITERIA • CHEMICALS BEING USED • LAB ACTIVITIES OR OTHER PROCEDURES • APPROPRIATE SUPERVISON • NATURE OF THE STUDENTS • AGE • LEVEL OF TRAINING • ROOM DESIGN • EXITS • CLEAR AISLES

  6. CSL 1 LOW RISK • WORK DOES NOT REQUIRE SPECIAL DESIGN FEATURES OR CONTAINMENT EQUIPMENT • CHEMICAL USE HIGHLY RESTRICTED • LOW HAZARD REAGENTS • SMALL VOLUMES

  7. CSL 1 LOW RISK • WORKERS ALL TRAINED AND USE GOOD LABORATORY WORK PRACTICE, FOLLOW DISTRICT POLICY (CHP) • EXPOSURE RISK LOW • EXAMPLE: • INSTRUMENT ROOM

  8. CSL 2 MODERATE RISK • CHEMICALS WITH LOW TO MODERATE RISK USED OPENLY • REAGENTS OF HAZ LEVEL 1 AND 2 • VOLUMES OF HAZ LEVEL 3 REAGENTS ARE RESTRICTED • > L. (LIQUIDS) • > 0.5 KGM (SOLIDS)

  9. CSL 2 MODERATE RISK • HAZARD CLASS 4 REAGENTS NOT PERMITED EXPECT BY PRIOR WRITTEN SPECIAL EXEMPTION FROM CHO • RISK LEVEL MODERATE • EXAMPLE: HIGH SCHOOL CHEM LAB

  10. CSL 3 SUBSTANCIAL RISK • ENGINEERING CONTROLS REQUIRED • FUME HOODS • PURGE FANS • CHEMICALS OF SUBSTANCIAL AND HIGH (2,3) RISK UNRESTRICTED • HAZARD LEVEL 4 REAGENTS PERMITED BUT MUST BE REPORTED

  11. CSL 3 SUBSTANCIAL RISK • QUANTITIES OF REAGENTS LIMITED BY NEED AND FIRE CODE • RISK SUBSTANCIAL • CONTROLLED BY ENGINEERING DEVICES, MINIMIZING QUANTITIES, AND CAREFUL WORK PRACTICES • EXAMPLE UNIVERSITY CHEM LAB

  12. CSL 4 HIGH RISK • SPECIAL ENGINEERING FEATURES AND CONTAINMENT EQUIPMENT • WORK PRACTICES WITH MULTIPLE BARRIERS FOR WORKER PROTECTION

  13. CSL 4 HIGH RISK • CHEMICAL USE IS UNRESTRICTED; GOVERNED BY PRESCRIBED PROTOCOLS FOR HANDLING, STORAGE AND DISPOSAL • SPECIAL FACILITY DESIGN AND EQUIPMENT REQUIRED

  14. CSL 4 HIGH RISK • RISK HIGH RISK OF EXPOSURE AND CONTAMINATION • EXAMPLE RESEARCH LABS SOME INDUSTRIAL LABS GOVERNMENT/MILITARY LABS

  15. STANDARD SAFETY EQUIPMENT CSL 1-4 • FIRE EXTINGUISHERS • PPE • GOGGLES • APRONS • GLOVES • RESPIRATORS (NOT FOR HS LABS) • EYEWASH STATIONS • DELUGE SHOWERS

  16. STANDARD SAFETY EQUIPMENT CSL 1-4 • FURNITURE • BENCH TOP NON POROUS,CHEMICAL RESISTANT • STURDY WORKABLE FURNITURE IN GOOD REPAIR • AISLES • MIN. 44 IN WIDE • NOT USED FOR STORAGE OR EQUIPMENT PLACEMENT

  17. STANDARD SAFETY EQUIPMENT CSL 1-4 • LAB AIR NOT RECIRCULATED TO REST OF BUILDING • NEGATIVE AIR PRESSURE WITH RESPECT TO CORRIDORS • OUTDOOR INTAKES LOCATED SO AS TO NOT RECAPTURE LAB VAPOR EXHAUST

  18. SPECIAL SAFETY EQUIPMENT FOR CLS 2 • DEDICATED STORAGE UNITS • FLAMMABLE SOLVENTS • CORROSIVES • TOXINS

  19. SPECIAL SAFETY EQUIPMENT FOR CLS 2 • CARTS OR SAFETY CARRIERS FOR TRANSPORTATION OF BOTTLES OF HAZARDOUS REAGENTS • SPILL KITS

  20. SPECIAL WORK PRACTICES FOR CSL 2 •CONTROL MOVMENT OF VISITORS • CHEMICALS OF HAZARD CLASS 2-4 SHOULD BE USED IN FUME HOODS • FACILITY SHOULD BE LOCKED DURING NON WORKING HOURS • SEPARATE WORK AND DESK AREAS

  21. EXAMPLES OF HIGH RISK CHEMICALS CLASS 4 • CARCINOGENS • BENZINE • CHROME VI IONS • FORMADEHYDE • REACTIVE / EXPLOSIVE • PERCHLORIC ACID • PICRIC ACID • HYDROGEN PEROXIDE

  22. EXAMPLES OF HIGH RISK CHEMICALS CLASS 4 • STRONG OXIDIZING AGENTS • NITRIC ACID • CHLORINE • OXYGEN • HIGHLY TOXIC • SODIUM CYANIDE • BROMINE • SODIUM DIAZIDE

  23. EXAMPLES OF HIGH RISK CHEMICALS CLASS 4 • FLAMMABLE (NFPA 4 ) • DIETHYL ETHER • ACETALDHYDE • HYDROGEN SULFIDE • SPECIAL HAZARDS (EHSO LIST) • HYDROFLUORIC ACID • ETHIDIUM BROMIDE

  24. STANDARD SAFETY PRACTICES FOR CSL 1 - 4 • MINIMIZE EXPOSURE TO ALL LABORATORY CHEMICALS • QUANTITY IN LAB, AND, IN PROCEDURES • VENTILATION / ENGINEERING CONTROLS • EYE PROTECTION REQUIRED • PROTECTIVE GLOVES

  25. STANDARD SAFETY PRACTICES FOR CSL 1 - 4 • PLANNING PRINCIPLES • CHEMICALS WITH INHERENT HAZARDS AND BE USED IN FACILITY • SUBSITUTE LESS HAZARDOUS REAGENTS WHEN POSSIBLE • USE SMALLEST QUANTITY POSSIBLE • PURCHASE MINIMIUM QUANTITY NEEDED FOR LAB PROCEDURES

  26. STANDARD SAFETY PRACTICES FOR CSL 1 - 4 • LIMIT ACCESS TO LAB DURING OPERATIONS • SIGNAGE • HAZARDS IN USE • LOCATION OF SAFETY EQUIPMENT • EXITS • CONTACTS • CSL DESIGNATION

  27. STANDARD SAFETY PRACTICES FOR CSL 1 - 4 • GOOD HOUSEKEEPING • NEAT • ORDERLY • LABELS ON ALL SECONDARY CONTAINERS • ANNUAL CLEAN UP OF REFRIGERATORS

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