Please enable JavaScript.
Coggle requires JavaScript to display documents.
CHEMICAL HEALTH RISK ASSESSMENT (CHRA) (risk assessments of chemical…
CHEMICAL HEALTH RISK ASSESSMENT (CHRA)
CHAPTER 10 & 11 : CONCLUDING ASSESSMENT & ACTION TO BE TAKEN
Concluding Assessment
Calculate RR = (er x hr)
Refer to table 12
[Link Title]
https://goo.gl/images/UqR7QJ
Decision on risk
Identify action
Risk not significant now & Not likely to increase in future
Risk significant but adequately controlled, could increase in future
Risk significant now & not adequately controlled
Uncertain about risk
Insufficient information
uncertain about degree and extent of exposure
Prioritize action
CHAPTER 9 :ADEQUANCY OF CONTROL MEASURE
Maintenance
Engineering control
PPE
Adequancy of existing control
Suitability
Toxicity of chemical
Physicochemical properties
nature of work
Adaptability
Route of entry
use and effectiveness
General
LEV
General Ventilation
PPE
-Existing control measures.
Design, construction & coommissioning of LEV
Action to control exposure
Engineering control equipment
maintenance record
CHAPTER 12 : REPORT WRITING
Assessment of risk to health report
REGULATION 12(2)
Immediately inform the employer
REGULATION 13(1)
Employer maintain the report
REGULATION 12(1)
-Assessor shall submit report
REGULATION 13(2)
Employer make available report
Format of assessment report
Finding
hazard, Exposure, control adequancy
conclusion
Background
introduction, objectives, process & work unit description, methodology
references
Executive summary
appendices
risk assessments of chemical
Ecological Risk assessment
-hazard screening
-exposure assesment
-risk characterization
Physical Risk Assessment
-hazard identification
-probability/frequency estimation of causes
-consequences analysis
-risk evaluation
Health Risk Assessment
-hazard identification
-exposure assessment
-dose response or toxicity assessment
-risk characterization
purpose of assessment
-to enable decison to be made on
induction and training of employees
-monitoring and health surveillance activitiestext
Asssesment objectives
-to identify hazard posed by chemicals
to evaluate degree of exposure
-to evaluate adequacy of existing control measure
-to conclude on the significance of risk
CONTENT OF ASSESSMENT
+regulation 9(2)
=potential risks
=methods and procedures in the use of chemicals
=nature of hazard to health
=degree of exposure
=risk to health
=control measure
=accidental emission control measures
=necessity for employee monitoring programme
=necessity for health surveillance
=requirements for training and retraining for employees
IMPLICATIONS OF REGULATION 9
=Table-top assessment
-identify potential health hazards
-anticipate worst case exposures
=assessment of existing information
-based on existing information
observation of existing activities and conditions
-to be carried out before 4th april 2001
RATING SCALE
rating 1; very low
rating 2;low
rating 3; moderate
rating 4; high
rating 5; very high
GENERIC ASSESSMENT
-only for those workplaces where
=similiar work activities conducted
=comparable level of risks
=same type of control measure used
-to get DOSH approval
=proposal on the scope for generic assessment
=lists and description of all workplace
REGISTERED ASSESSOR
-ability to;
=interpret information on labels
=understand hazard classfication under CPL regulations 1997
=observe work conditions to identify and anticipate potential problem
=draw risk conclusions systematically
=effective communication =report finding accurately
RATING IDLH EXPOSURE
POTENTIAL FOR CONCENTRATION THAT IS IMMEDIATELY DANGEROUS TO LIFE OR HEALTH
STEP 5: ESTIMATE MAGNITUDE QUALITATIVELY
BASED ON INDUSTRIAL HYGIENE
PROFESSIONAL JUDGEMENT
ESTIMATE EXPOSURE
consider inhalation and dermal absorption
consider dermal contact
BASED ON OBSERVATION OF THE
degree of chemical release or presence
degree of chemical absorbed or contacted
DEGREE OF RELEASE
rate of release
contamination of air, clothing, work surfaces
contamination of skin or eyes
DEGREE OF CONTACT/ ABSORPTION
BREATHING RATE
NEAMNESS TO BREATHING ZONE
DIRECT SKIN/ EYE CONTACT
CONDITION OF SKIN
STEP 6: ASSIGN ER
STEP 7: DEGREE OF CHEMICAL RELEASE
1 more item...
factor to consider :
