5a Hazard Management
5a Hazard Management
5a Hazard Management
HAZARD MANAGEMENTS
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UNIVERSITI TEKNOLOGI MALAYSIA
HAZARD ANALYSIS
Identify hazard
• Hazard identification means the identification of undesired events that lead
to the materialisation of the hazard and the mechanism by which those
undesired events could occur.
• Hazard can be classified into three main groups
• Health hazards
• any agent that can cause illness to an individual. A health hazard may produce serious and
immediate (acute) affects, or may cause long-term (chronic) problems.
• Health hazards include chemicals (such as battery acid and solvents), biological hazards
(such as bacteria, viruses, dusts and moulds), physical agents (energy sources strong
enough to harm the body, such as electric currents, heat, light, vibration, noise and
radiation) and work design (ergonomic) hazards.
HAZARD IDENTIFICATION, RISK ASSESSMENT AND CONTROL
(HIRARC)
Identify hazard
• safety hazards
• A safety hazard is any force strong enough to cause injury, or damage to property. An
injury caused by a safety hazard is usually obvious. For example, a worker may be badly
cut. Safety hazards cause harm when workplace controls are not adequate.
• Some examples of safety hazards include, but are not limited to -
• slipping/tripping hazards (such as wires run across floors);
• fire hazards (from flammable materials);
• moving parts of machinery, tools and equipment (such as pinch and nip points);
• work at height (such as work done on scaffolds);
• ejection of material (such as from molding);
• pressure systems (such as steam boilers and pipes);
• vehicles (such as forklifts and trucks);
• lifting and other manual handling operations; and
HAZARD IDENTIFICATION, RISK ASSESSMENT AND CONTROL
(HIRARC)
Identify hazard
• Environmental hazards
• An environmental hazard is a release to the environment that may cause harm or
deleterious effects. An environmental release may not be obvious. For example, a worker
who drains a glycol system and releases the liquid to a storm sewer may not be aware, of
the effect on the environment. Environmental hazards cause harm when controls and work
procedures are not followed.
HAZARD IDENTIFICATION, RISK ASSESSMENT AND CONTROL
(HIRARC)
Identify hazard
• Hazard identification techniques
• Company management shall develop a hazard identification and assessment
methodology taking into account the following documents and information -
• Develop a hazard checklist
• Conduct walk through survey/audits
• Job safety analysis
• Analyse unsafe act, unsafe condition
• Analyse work processes
• Consulting with employees
• Assess adequacy of training or knowledge required
HAZARD IDENTIFICATION, RISK ASSESSMENT AND CONTROL
(HIRARC)
Identify hazard
• Hazard identification techniques
• Reviewing documents and information
• any hazardous occurrence investigation reports;
• first aid records and minor injury records;
• work place health protection programs;
• any results of work place inspections;
• any employee complaints and comments;
• any government or employer reports, studies and tests concerning the health and
safety of employees;
• any reports made under the regulation of Occupational Safety and Health Act,1994
• the record of hazardous substances; and
• any other relevant information
HAZARD IDENTIFICATION, RISK ASSESSMENT AND CONTROL
(HIRARC)
Identify hazard
• Hazard identification techniques
• The hazard identification and assessment methodology shall include -
1) Steps and time frame for identifying and assessing the hazards.
a) One must define the steps for the identification of hazards and a time frame for this
identification. The following information should be included -
a) who will be responsible for the identification: for example, it may be the work
place health and safety committee, or an individual or individuals appointed by
the committee;
b) the way in which the identification reports are processed: for example, they
may be compiled and processed by the committee, or by individuals appointed
by the committee; and
c) the identification time frame: for example, the identification of hazards for
workshop A must be completed in December, for workshop B in April and for
workshop C in November.
HAZARD IDENTIFICATION, RISK ASSESSMENT AND CONTROL
(HIRARC)
Identify hazard
• Hazard identification techniques
• The hazard identification and assessment methodology shall include -
2) The keeping of a record of the hazards.
a) After having identified the hazards, one must establish and maintain an
identification record, either in print or electronic format.
Risk control
• Risk control means the process of implementing measures to reduce the
risk associated with a hazard.
• Hierarchy of control means the established priority order for the types of
measures to be used to control risks.
• Hazards should be controlled at their source (where the problem is created).
The closer a control to the source of the hazard is the better. This method is
often referred to as applying engineering controls.
• If this does not work, hazards can often be controlled along the path to the
worker, between the source and the worker. This method can be referred to
as applying administrative controls.
• If this is not possible, hazards must be controlled at the level of the worker
through the use of personal protective equipment (PPE), although this is the
least desirable control.
HAZARD IDENTIFICATION, RISK ASSESSMENT AND CONTROL
(HIRARC)
Risk control
• Hierarchy of control
HAZARD IDENTIFICATION, RISK ASSESSMENT AND CONTROL
(HIRARC)
Risk control
• Implementing a control
• often involves –
1) evaluating and selecting short and long term controls;
2) implementing short-term measures to protect workers until
permanent controls can be put in place; and
3) implementing long term controls when reasonably practicable.
• For example, suppose a noise hazard is identified. Short-term controls might
require workers to use hearing protection. Long term, permanent controls
might remove or isolate the noise source.
HAZARD IDENTIFICATION, RISK ASSESSMENT AND CONTROL
(HIRARC)
Risk control
• Type of control
• Engineering control
• At the source of hazards
• Elimination - Getting rid of a hazardous job, tool, process, machine
or substance is perhaps the best way of protecting workers. For
example, a salvage firm might decide to stop buying and cutting up
scrapped bulk fuel tanks due to explosion hazards.
• Substitution - Sometimes doing the same work in a less hazardous
way is possible. For example, a hazardous chemical can be replaced
with a less hazardous one. Controls must protect workers from any
new hazards that are created.
HAZARD IDENTIFICATION, RISK ASSESSMENT AND CONTROL
(HIRARC)
Risk control
• Type of control
• Engineering control
• Other controls
• Redesign - Jobs and processes can be reworked to make them safer.
For example, containers can be made easier to hold and lift.
• Isolation - If a hazard cannot be eliminated or replaced, it can some
times be isolated, contained or otherwise kept away from workers.
For example, an insulated and air-conditioned control room can
protect operators from a toxic chemical.
• Automation - Dangerous processes can be automated or
mechanized. For example, computer-controlled robots can handle
spot welding operations in car plants. Care must be taken to protect
workers from robotic hazards.
HAZARD IDENTIFICATION, RISK ASSESSMENT AND CONTROL
(HIRARC)
Risk control
• Type of control
• Engineering control
• Other controls
• Barriers - A hazard can be blocked before it reaches workers. For
example, special curtains can prevent eye injuries from welding arc
radiation. Proper equipment guarding will protect workers from
contacting moving parts.
• Absorption - Baffles can block or absorb noise. Lockout systems can
isolate energy sources during repair and maintenance. Usually, the
further a control keeps a hazard away from workers, the more
effective it is.
HAZARD IDENTIFICATION, RISK ASSESSMENT AND CONTROL
(HIRARC)
Risk control
• Type of control
• Engineering control
• Other controls
• Dilution - Some hazards can be diluted or dissipated. For example,
ventilation systems can dilute toxic gasses before they reach
operators.
HAZARD IDENTIFICATION, RISK ASSESSMENT AND CONTROL
(HIRARC)
Risk control
• Type of control
• Administrative control
• Safe work procedures - Workers can be required to use standardized
safety practices. The employer is expected to ensure that workers
follow these practices. Work procedures must be periodically
reviewed with workers and updated.
• Supervision and training – Initial training on safe work procedures
and refresher training should be offered. Appropriate supervision to
assist workers in identifying possible hazards and evaluating work
procedures.
HAZARD IDENTIFICATION, RISK ASSESSMENT AND CONTROL
(HIRARC)
Risk control
• Type of control
• Administrative control
• Job rotations and other procedures can reduce the time that
workers are exposed to a hazard. For example, workers can be
rotated through jobs requiring repetitive tendon and muscle
movements to prevent cumulative trauma injuries. Noisy processes
can be scheduled when no one is in the workplace.
• Housekeeping, repair and maintenance programs - Housekeeping
includes cleaning, waste disposal and spill cleanup. Tools, equipment
and machinery are less likely to cause injury if they are kept clean
and well maintained.
HAZARD IDENTIFICATION, RISK ASSESSMENT AND CONTROL
(HIRARC)
Risk control
• Type of control
• Administrative control
• Hygiene - Hygiene practices can reduce the risk of toxic materials
being absorbed by workers or carried home to their families. Street
clothing should be kept in separate lockers to avoid being
contaminated by work clothing. Eating areas must be segregated
from toxic hazards. Eating should be forbidden in toxic work areas.
Where applicable, workers should be required to shower and change
clothes at the end of the shift.
HAZARD IDENTIFICATION, RISK ASSESSMENT AND CONTROL
(HIRARC)
Risk control
• Type of control
• Personal protective equipment
• Personal protective equipment (PPE) and clothing is used when
other controls measures are not feasible and where additional
protection is needed.
• Workers must be trained to use and maintain equipment properly.
• The employer and workers must understand the limitations of the
personal protective equipment. The employer is expected to require
workers to use their equipment whenever it is needed. Care must be
taken to ensure
• that equipment is working properly. Otherwise, PPE may endanger a
workers health by providing an illusion of protection.
HAZARD IDENTIFICATION, RISK ASSESSMENT AND CONTROL
(HIRARC)
Risk control
• Monitoring control
• The effectiveness of controls must be checked regularly. Evaluate and
monitor hazard controls during inspections, routine maintenance, and other
activities.
• Ask the following questions –
• have the controls solved the problem?
• is any risk to workers posed by the controls contained?
• are all new hazards being identified?
• are significant, new hazards appropriately controlled?
• are accident reports being analyzed?
Risk control
• Safe work procedure
• Through the completion of a Job Hazard Analysis, sometimes hazards are
identified and cannot be eliminated or engineered out of a particular task.
• Safe Work Procedures are step by step instructions that allow workers to
conduct their work safety when hazards are present.
• A Safe Work Procedure identifies the materials and equipment needed, and
how and when to use them safety.
HAZARD IDENTIFICATION, RISK ASSESSMENT AND CONTROL
(HIRARC)
Risk control
• Safe work procedure
• Safe Work Procedures are generally prepared for -
• critical high risk jobs where accidents have or could result in severe
injuries;
• hazardous work where accidents occur frequently;
• new or altered tasks have been introduced;
• new equipment has been added to a process;
• a job that requires many detailed tasks;
• where two or more workers required for a job, and each must perform
specific tasks simultaneously; and
• specific tasks are done infrequently.
HAZARD IDENTIFICATION, RISK ASSESSMENT AND CONTROL
(HIRARC)
Risk control
• Safe work procedure
• Safe Work Procedures must include:
• regulatory requirements;
• necessary personal protective equipment;
• required training;
• worker responsibilities;
• specific sequence of steps to follow to complete the work safely;
• required permits; and
• emergency procedures.
Cost vs benefit
• Every hazard typically has several different remedies. Every remedy has a
corresponding cost and corresponding benefit. Management is not likely to
want to apply RM10 solutions to RM1 problems.
• It is important to factor in cost when recommending corrective action
regarding hazards. This amount to listing all of the potential remedies along
with their respective costs and then estimating the extent to which each will
reduce the hazard
COST-BENEFIT FACTORS
Cost vs benefit
• In the following figure is an example of cost-benefit analysis matrix.
• After examining this matrix, the remedy that makes the most sense from the perspective of
both cost and impact on the hazards is the Plexiglass door. It eliminates two of the hazards and
reduces the third. The flexible curtain costs less but does not have a significant impact on
hazards. The third and fourth options cost more and have less impact on the hazards
FACULTY OF MECHANICAL ENGINEERING
THE END
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UNIVERSITI TEKNOLOGI MALAYSIA