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 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 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 LIMIT ACCESS TO LAB DURING OPERATIONS SIGNAGE –HAZARDS IN USE –LOCATION OF SAFETY EQUIPMENT –EXITS –CONTACTS –CSL DESIGNATION

27 STANDARD SAFETY PRACTICES FOR CSL GOOD HOUSEKEEPING –NEAT –ORDERLY LABELS ON ALL SECONDARY CONTAINERS ANNUAL CLEAN UP OF REFRIGERATORS