Measuring Exposure in Units - POSHE

The two main units used for measuring airborne concentrations are:

• Parts per million (ppm)
• Milligrams per cubic metre of air (mg/m power of 3, or mg m power of ‐3)

The gaseous state (vapours and gases) is measured in ppm and refers to the number of parts of vapour or gas of a substance in a million parts of air by volume, measured at a standard temperature and pressure (usually 25°C and 760 mm Hg, respectively). Particulate matter in dusts, fumes, etc. is measured in mg/m3, which refers to the milligrams of the substance per cubic metre of air.

One further unit of measurement is used in relation to fibres (such as asbestos). Concentrations of fibres are expressed in:

• Fibres Per Millilitre of air (fibres ml ­power of ‐1)

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Identifying the population at risk - POSHE

A suitable and sufficient risk assessment needs to identify all those that are potentially at risk and how. When considering who is at risk it is important to r all those who may be affected by the activity being assessed, not just those directly involved. Therefore the assessment would need to consider; 

• Employees 
• Maintenance staff 
• Cleaners 
• Contractors, 
• Visitors
• General public 

Within these groups there might be specific groups at risk such as young persons, new or expectant mothers and disabled persons (learning or physical disability) - see later in this section. 

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Accidents in Terms of injury

There are several categories of accidents in terms of injury and these include: 

• Slips/trips/falls
• Falls from height 
• Falling objects 
• Collision with objects 
• Trapping/crushing under or between objects
• Manual handling 
• Contact with machinery/hand tools 
• Electricity 
• Transport 
• Contact with chemicals 
• Asphyxiation/drowning
• Fire and explosion 
• Animals
• Violence - either verbal or physical 

Health hazards 

Risk assessment is not only concerned with injuries in the workplace but also possible occupational health problems. Health hazards fall into four categories; 

• Chemical - paints, solvents, fumes. 
• Biological- bacteria e.g. leptospirosis, viruses. 
• Physical - noise, vibration, radiation. 
• Psychological- occupational stress. 

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Precautions to prevent fires

The following precautions should be taken to prevent fires:

• use less-easily ignited and fewer flammable materials, eg use water-based or low-solvent glues and paint;
• keep the quantity of flammables at the workplace to a minimum;
• always keep and carry flammable liquids in suitable closed containers;
• have an extinguisher to hand when doing hot work such as welding or using a disc cutter that produces sparks;
• check the site at lunch time and at the end of the day to see that all plant and equipment that could cause a fire is turned off. Stop hot working an hour before people go home, as this will allow more time for smouldering fires to be identified; and
• provide closed metal containers to collect rubbish and remove them from the site regularly. Collect highly flammable waste such as solvent-soaked rags separately in closed fire-resisting containers.

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NEBOSH COURSE IN CHENNAI

Nebosh IGC Course are extensively valued across globe and is prerequisite for anyone working in or looking to work in the sphere of health and safety.

Nebosh IGC Course in Chennai from POSHE brings a breakthrough for your career in health and safety, or a step ahead to do further qualifications like NEBOSH International Diploma or Occupational Safety Health International Diploma(OSH IDIP).

NEBOSH International General Certificate has 3 units:

• Unit IGC 1: Management of International Health and safety
• Unit GC 2: Control of International Workplace Hazards
• Unit GC 3: International Health and Safety

Assessment

Units IGC1 and GC2 of the NEBOSH International General Certificate are assessed by two-hour written examination each. Unit GC3 is assessed by a practical assessment carried out at your own workplace. 

To Qualify you must score minimum 45% in unit IGC 1 & GC 2 and 60 % in GC 3.

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NEBOSH IGC + IOSH MS + 3 International Certificates 

+ 1 Year Diploma

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FIRE TETRAHEDRON

There are basic 3 element need to produce fire.

• HEAT
• FUEL
• OXYGEN

if one of component is not presents the fire will not created.

Beside 3 elements there is forth element which is essential for continuation of fire once ignited.this is known as "CHAIN REACTION".

Once fire occurs the burned substunce produce lots of heat which tends to burn remaining fuel substance.this reaction occurs again and again.which is called "chain reaction"

Fire is OXIDATION process which produce heat its is also called EXOTHERMIC reaction..

OXIDATION = EXOTHERMIC R. = PRODUCE HEAT.
REDUCTION = ENDOTHERMIC R. = ABSORB HEAT.

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