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MANUFACTURING PROCESS – I (ME204) QUESTION BANK Chapter -1: Concepts of Manufacturing 1. What is a process? 2. What are the general categories of manufacturing? 3. What is process plann...
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Chemical Health Risk Assessment Assessm ent (CHRA) Process
CHEMICAL HEALTH RISK ASSESSMENT (CHRA)
A structured approach to identifying, evaluating and controlling chemical health hazards in the workplace.
•
RHM CONSULTANT SDN BHD
HRA-1M
What is CHRA ? Deciding the assessor IDENTIFY
Gather information
Evaluate the risk
Review
Further info needed?
ASSESS
Is the risk to health controlled to be as low as reasonably practicable ?-ALARP YES
NO
CONTROL & RECOVER
Record assessment
Decide on remedial action
CHRA Process Gather information • Hazard Rating (degree of hazard) • Assessment units • Exposure evaluation •
CHRA Process Assess adequacy of control measures • Evaluate risk and conclude assessment • Action plan/recommendations • Report submission • Review assessment •
Risk Evaluation •
• •
•
RR = (HR X ER) RR = risk rating, HR = hazard rating ER = exposure rating RR = 1, 2 - risk not significant RR = 3,4 - risk significant cat 1(adequately controlled but could increase in future) RR = 5 - risk significant cat 2 (not adequately controlled)
Hazard Rating • • •
Based on toxicity Rating 1-5, 5 most hazardous Information from MSDS, CPL regulations
Exposure Rating •
•
Depend on magnitude of exposure, frequency and duration of exposure Magnitude of exposure derived from on professional Judgement and workplace observation, records of monitoring, and additive effect of chemicals
EXPOSURE RATING (ER)
1
2
3
4
5
1
RR=1
RR=2
RR=2
RR=2
RR=3
2
RR=2
RR=2
RR=3
RR=3
RR=4
3
RR=2
RR=3
RR=3
RR=4
RR=4
4
RR=2
RR=3
RR=4
RR=4
RR=5
5
RR=3
RR=4
RR=4
RR=5
RR=5
(HR)
HAZARD RATING
Gathering Information •
• • •
•
Identify Chemical Hazards used or released in the workplace Layout plan/process description/flowchart Identify Job Types and employees at risk Records of incidence/accidents/monitoring/inspection etc. Control measures including training and health surveillance
Identify Hazards Divide into manageable units( Assessment /WorkUnits ) -through survey • Walk - Looking at ( equipment,chemicals, activities etc.) Task/Hazards matrix • Make a • Look at Records -(incidents/fault reports, inspections, maintenance, sickness absence, hygiene surveys ) • Create an inventory of Chemical Hazards •
Documents/Information Required • • • • • •
Plant Layout Plan Operation Overview/ Process Flowcharts Organisation Chart List of chemicals JobTypes/Tasks for each units and list of employees Other records-at site -Safety Manual, incidents/faults, inspections, maintenance, sickness absence, Medical Records(Clinic), hygiene surveys, minutes of safety meeting.
