grand canyon hlt555 week 3 Exposure and Risk Assessment
This assignment is in two parts:
Part 1: Exposure Assessment Case Study
Read “Cross-sectional Exposure Assessment of Environmental Contaminants in Churchill County, Nevada” by the Centers for Disease Control and Prevention (2003). Use this case study to complete the Exposure Assessment form.
Part 2: Risk Assessment Case Study
Read “Illness Associated with Drift of Chloropicrin Soil Fumigant Into a Residential Area – Kern County, California, 2003.” Use this case study to complete the Risk Assessment assignment.
(50 points)
Directions: Use the case study to provide answers to the following questions.
Case Study:“Illness Associated with Drift of Chloropicrin Soil Fumigant into a Residential Area—Kern County, California, 2003,” located on p. 154 of the textbook
1. Issue Identification
a. What is causing the identified problem?
b. Why is the problem a problem?
c. How was the problem initially identified?
d. What are the public perceptions of the hazard?
2. Hazard Identification
a. What types of adverse health effects might be caused by the problem?
b. How quickly and for what duration might the problem be experienced?
3. Dose Response Assessment
a. Evaluate both qualitative and quantitative toxicity information to estimate the incidence of adverse effects occurring in humans at different exposure levels.
4. Exposure Assessment for the Relevant Population
a. Determine the frequency, magnitude, extent, duration, and character of exposures to the hazard.
5. Risk Characterization
a. Detail the nature and potential incidence of effects for the exposure conditions described in the exposure assessment.
(50 points)
Directions: After reading the Centers for Disease Control and Prevention case study, answer the following questions.
Case Study:“Cross-sectional Exposure Assessment of Environmental Contaminants in Churchill County, Nevada” by the Centers for Disease Control and Prevention.t http://www.cdc.gov/nceh/clusters/fallon/factsheet.pdf
1) Identify the agent:_____________________________________________________
2) What type of agent is described?
biological
chemical
3) Source:
anthropogenic non-anthropogenic
area point
stationary mobile
indoor outdoor
4) Transport/carrier medium:
air
water
soil
dust
food product item
5) Exposure pathways:
eating contaminated food
breathing contaminated air
touching a contaminated surface
drinking contaminated water
6) Exposure concentration:
mg/kg (food) mg/litre (water)
ug/m3 (air) ug/cm3 (contaminated surfaces)
% by weight fibres/m3 (air)
7) Exposure route:
inhalation dermal contact
ingestion multiple routes
8) Exposure frequency:
continuous intermittent
cyclic random
rare
9) Exposure duration:
seconds minutes
hours days
weeks months
years lifetime
10) Exposure setting:
occupational non-occupational
residential non-residential
indoors outdoors
11) Exposed population:
general population
population subgroups
individuals
12) Geographic scope:
site specific
local regional
national international
global
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Rating:
/5
Solution: grand canyon hlt555 week 3 Exposure and Risk Assessment