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
- Identify the agent:_____________________________________________________
- What type of agent is described?
biological
chemical
- Source:
anthropogenic non-anthropogenic
area point
stationary mobile
indoor outdoor
- Transport/carrier medium:
air
water
soil
dust
food product item
- Exposure pathways:
eating contaminated food
breathing contaminated air
touching a contaminated surface
drinking contaminated water
- Exposure concentration:
mg/kg (food) mg/litre (water)
ug/m3 (air) ug/cm3 (contaminated surfaces)
% by weight fibres/m3 (air)
- Exposure route:
inhalation dermal contact
ingestion multiple routes
- Exposure frequency:
continuous intermittent
cyclic random
rare
- Exposure duration:
seconds minutes
hours days
weeks months
years lifetime
- Exposure setting:
occupational non-occupational
residential non-residential
indoors outdoors
- Exposed population:
general population
population subgroups
individuals
- Geographic scope:
site specific
local regional
national international
global
