Loading in 2 Seconds...
Loading in 2 Seconds...
Introduction to Hazard Identification, Evaluation and Control. EH202 April 1, 2009. Overview. Hazard Identification What are the health effects this agent can cause? 2. Exposure Assessment What exposures are currently experienced or anticipated under different conditions?
Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.
April 1, 2009
What are the health effects this agent can cause?
2. Exposure Assessment
What exposures are currently experienced or anticipated under different conditions?
3. Dose-Response Relationship
What is the relationship between dose and occurrence of health effects in humans?
4. Risk Characterization
What is the estimated occurrence of the adverse effect in a given population?
5. Risk Management
Is the risk acceptable and if not what will you do to control or reduce the risk?
Repair and physiologic adaptation
1. Gather information on the hazard
What form of mercury?
Can the exposure lead to a dose?
What are the adverse health effects of the dose?
Is there vulnerable sub-populations?
What is your qualitative judgment of hazards in tuna?
New York Department of Environmental Conservation
Fitzpatrick Color Atlas
McGraw-Hill Companies, 2005
54 year old male ate can tuna daily for 5 years
Blood Hg = 52ug/LUrine=non-detected
Stopped eating tuna
Hg decline with t ½~ 80d
After 7months blood Hg= 7ug/L
From: Sullivan JB, Krieger GR. Clinical Environmental Health and Toxic Exposures, pg. 206
NOAEL = no observed effect level
LOAEL = lowest observed effect level
Reference Dose = NOAEL
Marsh et al., 1987
Bakir et al., 1973
Geometric mean 4.22
Murata et al. 2004
Is this exposure or dose?
Data from FDA
Exposure Factors Handbook
0.17 ug/gram *3.491 gram/day = 0.6 ug/day
Divide by BW (60 kg- average woman)
Conditions: Globe Temperature 190-200ºC
Clothing Assembly Exposure Time Reason for Leaving Max. Pulse Rate
1. Standard Task Gear 1 min. 45 secs. Skin pain 114 ppm
2. Standard Task Gear 7 mins. 30 secs. Foot discomfort 165 ppm
3. Aluminized Outer 13 mins Equipment 165 ppm
Gear and Helmet
4. Aluminized Outer Gear, 20mins. _ 115 - 120 ppm
Helmet and Water-
Goal is to reduce the likelihood of the event
Reduce the severity of the transfer of energy
Reduce the disability due to the injuries
The risk management process involves:
To identify environmental hazards in your workplace, you can:
In assessing the risks associated with the work environment, the following two factors should be considered:
If a hazard is determined to be a risk (based on likelihood of occurrence and severity of consequences), it is advisable to provide time, money and personnel resources to help prevent or minimise the risks.