Exposure and Risk Assessment

Exposure and Risk Assessment

Exposure and Risk Assessment

HLT555 Environmental Health

Week 3 Assignment

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.

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

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.

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.

Exposure and Risk Assessment.