TEACHING SAFETY: 1000 STUDENTS AT A TIME

Sheila Kennedy & John PalmerChemistry & Biochemistry

University of California, San Diego

the flow

STUDY or

REVIEWEXAM 2ND

EXAMREVIEW

WHINING & MOANING

CONTINUE WITH LAB CLASS

ANNOUNCEMENTS

SCHEDULE OF CLASSESATTENDANCE AT THE FIRST LAB MEETING IS MANDATORY

Check the class web site for first-day information and come to lab prepared to work. Students who miss the first thirty minutes of the first lab meeting of the quarter will be administratively dropped from the course.

LABORATORY SAFETY REQUIREMENTAll students in CHEM 6BL, 100A, 143A and 143AM are required to demonstrate an understanding of general lab safety and of the UCSD Undergraduate Chemistry Lab Rules. Passing the Lab Safety Exam (administered in the second or third lab meeting) fulfills this requirement; students who do not pass the Lab Safety Exam may be administratively dropped from the course with the grade of "W." Information on the Lab Safety Exam (including study resources and topics which may be covered) will be distributed in the first class lecture. Each student is responsible for learning the material. Information on general lab practices and our specific rules can be found on the web at: http://chem-courses.ucsd.edu/Uglabs/ and http://blink.ucsd.edu/Blink/External/Topics/How_To/0,1260,14110,00.html .

UCSD Chemistry & Biochemistry Undergraduate Teaching Laboratories

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https://webctweb.ucsd.edu

ALL students in these introductory lab classes are required to demonstrate an understanding of general laboratory safety and the UCSD Undergraduate Chemistry Lab Rules. Each student is responsible for studying these topics and passing the safety exam. Students who fail to demonstrate an understanding of general laboratory safety and familiarity with the Undergraduate Chemistry Lab Rules will be dropped from the course with a grade of "W."

The LAB SAFETY EXAM will be given during regularly scheduled lab periods: for CHEM 100A & 143A: Wed. Sept. 30 & Thurs. Oct. 1.

for CHEM 6BL: Mon. & Tues., Oct. 5 & 6. A PASSING SCORE (75%) on the exam fulfills this requirement.

Students who FAIL the first exam may retest (YH2722) & remain in the class (passing score = 85%): for CHEM 100A & 143A: Tuesday morning, October 6, at 7:00AM

for CHEM 6BL: Thursday morning, October 8, at 7:00AM

REVIEW SESSIONS for students taking the second exam (NSB 3209): for CHEM 100A & 143A: Mon., Oct. 5, 5:00PM

for CHEM 6BL (2 sessions): Wed., Oct. 7, 5:00PM & 6:30PM Staff will be available to answer questions while you review with other students.

Bring (to either exam): UCSD student ID card , #2 pencils & eraser. Scantron forms will be provided. Students who report ID numbers incorrectly may not receive credit. No makeup times are planned for students who do not attend – contact Instructor immediately in case of illness or serious conflict.

EXAM RESULTS will be available to students on the Lab Instructor’s web site and (with the student's express permission) will be posted at YORK4124. It is the student's responsibility to obtain exam scores and, if necessary, appear for the second exam. The safety exam score may be used as part of a class grade and retesting may have no effect on a failing score for the purpose of assigning a course grade (see Instructor’s course syllabus).

PREPARE CAREFULLY:

Go to https://webctweb.ucsd.edu and log onto our WebCT safety portal for:

lab safety information notes on the safety exam program study resources meeting & test dates

All CHEM lab students should have access; request access assistance from Academic Computing Services (534-3227). _____________________________________

Observe & learn about the LAB SAFETY EQUIPMENT in your lab: listen to TA’s comments and request explanation of anything that’s new. Read the signs posted in your lab.

A SAFETY LECTURE will be presented twice (Dr. Palmer & Ms. Kennedy):

TUESDAY September 29, 6:00PM York 2722

WEDNESDAY September 30, 8:00AM Student Service Ctr. (Multipurpose Room)

No lecture covers all details of a topic, but we’ll highlight some items everyone needs to know. Safety staff will be available to answer questions that may arise in your reading. _____________________________________

Learn SAFETY RULES posted in the labs and at: http://www-chem.ucsd.edu/academic/Instruc/lab/rules.cfm

For more information, contact: Sheila Kennedy, CHO, Safety Coordinator, CHEM Undergraduate Labs (858/534-0221; s1kennedy@ucsd.edu).

Undergraduate Laboratory Safety Exam

STUDY GUIDE & PRACTICE QUESTIONS

WINTER 2010

Sheila Kennedy, CHO John Palmer, PhD

Chemistry & Biochemistry University of California, San Diego

SAFETY LECTURES – two presentationsMORNING & EVENING

Evacuate Safely• Turn off gas & electricity in your area• Pick up personal bags, if safe• Stairs only - never elevators• Pull fire alarm (near stairs) while exiting• Assist others • Assemble & account - don’t

risk injury to responders• Report to your lab supervisor

– TA– Instructor– Lab staff

Hazardous Materials: Store in trays or tubs

Segregate hazards: “store like with like”

PERSONAL PROTECTION

Arrive preparedRestrain long clothing

& hairPPE =

Personal Protective Equipment

NOT THISNOT THIS

SAFETY EXAM

• In lab class – 2nd meeting: Analytical & O-Chem Labs– 3rd meeting: General Chem Lab

• Proctored by Lab TA• pass back to work• fail drop class or go to second exam

Scantron forms allow us to process 500 students

in a few hours.

~ 500 students in Introductory Inorganic Chemistry Lab (General Chem)

~ 450 in Introductory Organic Chemistry Lab

80 – 100 in Introductory Analytical Chemistry Lab

REVIEW MEETING

Option for students studying for exam 2Small group studyQuestions to staffDemonstration of goggles, bottle jackets, waste

bottles . . . .

TEST AGAIN

Multiple-choice Comments encouraged 7:00AM – results in the afternoon

pass return to lab classfail administrative drop from class

WHINING & MOANING

“I really, really need to stay in this class...”

“Nobody told me I failed”

“I didn’t check my scores – I assumed I passed”

“I couldn’t have failed . . . it’s only a safety test ”

the flow

STUDY or

REVIEWEXAM 2ND

EXAMREVIEW

WHINING & MOANING

CONTINUE WITH LAB CLASS> 90% + >90%

ANNOUNCEMENTS

calendar view S M T W TH F S

ANNOUNCE in first labs

ANNOUNCE in first labs

Evening LECTURE

Morning LECTURE

TEST 1A TEST 1A

SCORE EXAMS

SCORE EXAMS

POST SCORES

TEST 1B

EXAM REVIEW (6 – 8pm)

TEST 2A (7am)

TEST 1B

SCORE & POST 2A

EXAM REVIEW (5 – 8pm)

TEST 2B (7am)

SCORE & POST 2B

UCSD Chemistry & Biochemistry Undergraduate Teaching Laboratories

Laboratory Hood User Checklist

Know the location of nearest eyewash/shower & fire extinguisher Know the hazards of the materials to be used Check for a current certification sticker Verify that adequate face velocity exists Always keep the hood sash between the operator’s face & the work Keep upper body & head outside the plane of the hood sash* Keep baffle slots free of obstructions (by apparatus or containers) Work and place equipment >6 inches behind the sash Allow free flow of air currents across the hood work surface:

o Minimize storage in hoods o Elevate bulky equipment on racks or feet (~1.5 in.) o Limit rapid movements (of arms & equipment) in & out of hood

Reduce cross drafts at hood face by minimizing pedestrian traffic

Never turn off hoods (at UCSD, we have no ON/OFF switches)

Report problems with hoods immediately o York Lab Staff (x40222; 858.534.0222) o NSB Lab Staff (x24316; 858.822.4316) o Facilities Mgmt. (x42930; 858.534.2930)

Post a sign on malfunctioning hood to keep others from using it until it can be repaired – state problem & date reported

*The exception to this rule arises when arranging equipment in the hood. Lower the sash before beginning operations that produce fumes/vapors/gases.

COMPRESSED GASES HAZARD AWARENESS TRAINING

TANKS MAY CONTAIN hazardous (TRICky) materials:

Toxic Rective

Ignitable Corrosive

... or contents may not be chemical hazard.

TANKS are under pressure. Whatever the contents, the pressure is a physical hazard - an unrestrained tank can become a rocket.

Periodic hydrostatic testing Remove regulator, replace valve cap before moving Move only on a cart with restraint (strap/chains) Install with restraint @ 1/3 & 2/3 height Use chain, not web straps, for fire safety Label & date tank

TOXIC & FLAMMABLE GASES are stored in hood or gas cabinets

CHECK FOR LEAKS with soap solution – look for bubbles

COMPRESSED GAS ASSOCIATION (CGA) sets standards for gases, tanks, regulators, etc.

CGA FITTINGS: match tanks & regulators for specific gas type. Thread depth & diameter Inside/outside threads Right- & left-handed threads

REGULATORS Nitrogen – simple for non-flammable, non-corrosive gas Nitrous oxide – heated to prevent freezing Acetylene – left-handed (for flammable gases)

ACETYLENE (C2H2) has left-handed threads on CGA570 fittings is piped in stainless; C2H2 forms explosive copper acetylide highly flammable (2 – 80% = wide range) simple asphyxiant

THE NEXT BIG THING

• Train sooner• Train better • Test sooner