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INTRODUCTION CHRA (Content CHRA (The risk to health created by the use and…

- - - - Understand the hazard classification as prescribed by the CLASS Regulations, Pesticide Act 1974 and the Environmental Quality (Scheduled Wastes) Regulations 2005
      - Observe the conditions of work and anticipate potential risk to health
      - Interpret the information in the SDS and labels as prescribed by the CLASS
        Regulations and detailed out in the ICOP CHC
      - Communicate effectively with workers, contract workers, managers, specialists
        and others
      - Draw all the information together in a systematic way to form valid conclusions about exposures and risks
      - Report the findings accurately to all parties concerned
  - - - a person who has expertise in
        occupational medicine and medical surveillance programme
    - - competent person on the inspection and testing of engineering control equipment and the exposure monitoring of airborne
        chemicals
    - - an expert on the identification of hazards, exposure evaluation and control of health risks
    - - an expert on chemical toxicity
  - - - conduct exposure monitoring programme
      - carry out a medical surveillance programme
      - control any accidental emission of a CHTH as a result of leakage, spillage, or process or equipment failure
      - institute a training programme for workers
      - make changes or institute a programme to control exposure of workers to
        CHTH
- - - - The risk of a person getting silicosis is high if he is exposed daily to stone dust containing a high concentration of silica for a long period of time, without wearing suitable respirator
    - - Risk = How x How bad x How much
      - How: Means how the chemical comes into contact
      - How bad: Refer to toxicity of the chemical
      - How much: Refer to the amount of the chemical coming into contact with the body
      - Risk = Hazard x Exposure
  - - - A person working in stone quarry is exposed to silica due to his inhalation of the quarry dust
  - - - Potential of a chemical to cause harm or adversely affect health
        of workers in the workplace
      - Adverse health effect ranges from fatality, permanent and serious
        health impairment to mild skin irritation at the other end
      - Examples
        
        Sodium cyanide is hazardous because a small amount of it can kill a person
        
        Nitric acid is hazardous because it can cause damage to the part of body that is in contact with it
- - - - Site specific CHRA
        
        should be conducted for each and every workplace where CHTH are used
      - Generic CHRA
        
        done at representative locations which may be applied to all other locations in which the work activities are similar, with comparable levels of risk, and similar control measures
  - - - listed in the chemical register
      - not classified as carcinogenicity category 1; mutagenicity category 1; or respiratory sensitisation category 1
    - - Simple Risk Assessment and Control for Chemicals (SiRAC) method
    - - Physical form
      - Boiling point or vapour pressure
      - Hazard classification (according to CLASS Regulations)
      - Operating temperature of the chemicals (where applicable)
      - Quantity used
      - Total duration of exposure to the chemicals