Reference no: EM132435081

Part 1: Exposure Assessment Case Study

Directions: After reading the Centers for Disease Control and Prevention case study attached, 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

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

Directions: Use the case study attached 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,"

Question 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?

Question 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?

Question 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.

Question 4. Exposure Assessment for the Relevant Population

a. Determine the frequency, magnitude, extent, duration, and character of exposures to the hazard.

Question 5. Risk Characterization

a. Detail the nature and potential incidence of effects for the exposure conditions described in the exposure assessment.