NAME:
DATE:
Score
COURSE(Year & Section):
CLASS SCHEDULE:
MODULE 10: CHEMICAL SAFETY
ACTIVITY
Instruction:
1. Match the pictograms below with the corresponding hazards. Classify this hazard as
physical, health or environmental hazard? 18 points
(Example: 1. e-physical hazard)
1.
2.
3.
4.
5.
6.
7.
8.
9.
Hazard
Classification of
Hazard
_______
_______
_______
_______
_______
_______
_______
_______
_______
__________________
__________________
__________________
__________________
__________________
__________________
__________________
__________________
__________________
2. Read and review each of the 16 sections in the sample SDS given on pages 246-259. Below
are the questions about SDS. Write the appropriate LETTER that corresponds to your answer
on the space provided before the number.
(2 points each, 22 points total)
_____1. Who is responsible for obtaining or developing a safety data sheet (SDS) for
each hazardous chemical they produce?
a. Employers
b. Employees
c. Manufacturers
d. Distributors
_____2. Which sections of the SDS are mandatory and must be included?
a. Sections 1-5 and 11
b. Sections 2-12 and 15
c. Sections 2-11 and 14
d. Sections 1-11 and 16
_____3. In which SDS section would you be directed not to flush a chemical down
drainage systems?
a. Section 3. Composition/Information on Ingredients
b. Section 4. First Aid Measures
c. Section 5. Firefighting Measures
d. Section 6. Accidental Release Measures
_____4. In which SDS section would you be cautioned not to get the chemical in your
eyes, on skin, or on clothing?
a. Section 6. Accidental Release Measures
b. Section 7. Handling and Storage
c. Section 8. Exposure Controls
d. Section 9. Physical and Chemical Properties
_____5. In which SDS section would you be informed of signs and symptoms of
overexposure?
a. Section 9. Physical and Chemical Properties
b. Section 10. Stability and Reactivity
c. Section 11. Toxicological Information
d. Section 12. Ecological Information
_____6. In which SDS section is the chemical possibly designated a hazardous waste
according to Federal regulations?
a. Section 13. Disposal Considerations
b. Section 14. Transport Information
c. Section 15. Regulatory Information
d. Section 16. Other Information
_____7. In which SDS section would European Union (EU) risk and safety phrases be
listed?
a. Section 13. Disposal Considerations
b. Section 14. Transport Information
c. Section 15. Regulatory Information
d. Section 16. Other Information
_____8. After you are aware of significant new information about a specific chemical,
how soon must you add it to the SDS?
a. Within 3 months
b. 9 months
c. Up to 1 year
d. 2 years
_____9. The wholesale distributor must do each of the following EXCEPT _____.
a. providing a SDS within 30 days of the employer purchase
b. providing the SDS at the time of purchase by the employer
c. providing a SDS upon request by the employer
d. posting a "SDS Available" sign or otherwise informing the employer
_____10. Where may the safety data sheets be kept when employees travel between
workplaces during a shift?
a. May be kept anywhere
b. Must be in the cab of the truck
c. May be kept at the primary workplace facility
d. Must be filed in a computer
11. SDS stands for _____________________________________________________
NAME:
DATE:
COURSE(Year & Section):
CLASS SCHEDULE:
Score
CHEMICAL SAFETY
CASE STUDY (QUIZ)
Stuy and analyze the case regarding chemical safety. Based on the given facts, analyse the
cause of ths accident and fill out the Causal Analysis table. After your assessment, as a safety
officer, what would be your recommendations and learning points regarding this case.
CASE: CONTACT WITH HYDROFLOURIC ACID DURING DECOMMISSIONING OF
PRESSURISED TANK
Description of Incident: Liquefied propane with traces of hydrofluoric (HF) acid was passed
through a pressurised tank for treatment. The tank contained solid potassium hydroxide which is
being consumed during the treatment had to be periodically replaced. A process technician was
isolating the tank to replace the potassium hydroxide. After depressurising the tank, he connected
a rubber hose from the nitrogen gas supply valve to the utility connector valve of the tank to initiate
nitrogen purging. He then opened the utility connector valve without verifying that the tank had
been fully depressurised. The rubber hose burst and contents from the tank gushed out. The
technician suffered severe chemical burn injuries.
Photographs showing the burst rubber hose used to connect the tank utility connector valve to
the nitrogen gas supply valve.
1. Utility connector valve.
2. Nitrogen gas supply valve.
3. Rubber hose.
4. Utility connector.
5. Utility connection valve.
6. Burst rubber hose with its quick coupling.
POSSIBLE CAUSES AND CONTRIBUTING FACTORS
WORKER
• The worker opened the valve located at the bottom of the tank to depressurise the tank.
However, this method caused the sludge to choke the pipeline and hinder the
depressurising process.
• The worker failed to ensure complete depressurisation of the tank before opening the
bottom valve.
• The worker wore a lower-class HF suit which did not provide sufficient protection for the task
in the event of a chemical splash.
• He proceeded to purge the tank without authorisation from his supervisor.
MANAGEMENT
• Safe work procedures have not been documented specifically for tank decommissioning.
• The management failed to ensure that the workers wore the appropriate class of chemical
protective suit.
CAUSAL ANALYSIS
Evaluation of loss
Type of contact
Immediate cause(s)
Basic Cause(s)
Failure of Occupational
Safety and Health
Manaagement
RECOMMENDATIONS AND LEARNING POINTS