Reference no: EM133242886
Assignment Brief 1
Provide answers to the following questions, and where necessary use your own words:
Exposure assessment is one of the more critical and complex areas of risk assessment. Due to the complexity and scale of the EHRA process, a concise 'cookbook'/ approach on exposure assessment is not practicable. In light of this,
- Define exposure assessment. (Refer to Chapter 4: section 4.1; pg 42) [2]
- Explain any two aims of exposure assessment. (Refer to Chapter 4: section 4.1; pg 42) [4]
There are numerous terminologies used to define exposure as well as factors that can influence the extent of exposure by various pathways. Bearing this in mind,
- Describe the terminologies as applied to exposure assessment under any 2 of the following headings;
- exposure concentration,
- exposure duration,
- exposure frequency,
- exposure event,
- exposure route. (Refer to Chapter 4: section 4.2; table 6; pg 43) [4]
There is a number of elements to take into cognizance when planning an exposure assessment. Therefore,
- Articulate any two of the basic elements to consider in the planning process. (Refer to Chapter 4: section 4.1; pg 42) [4]
A chemical or other agent may be released to the environment from a facility, situation or process in a variety of ways.
- Outline any 4 steps in planning an exposure assessment. (Refer to Chapter 4: section 4.3; subsection 4.3.1; pg 45) [2]
- Explain the significance of developing a conceptual site model. (Refer to Chapter 4: section 4.4; subsection 4.4.1; pg 47) [4]
Assignment Brief 2
Provide answers to the following questions, and where needed apply your own words.
- Discuss any two principal determinants of the level of exposure. (Refer to Chapter 4: section 4.5; subsection 4.5.2; pg 51) [4]
- Articulate any two ways, in which the quantification of exposure can be achieved. (Refer to Chapter 4: section 4.5; subsection 4.5.3; pg 51) [4]
There have been various generic formulae which have been formulated for calculating chemical intake from various media. As such,
- Express the generic formula for calculating chemical intake under any two of the following headings;
- formula for oral ingestion,
- formula for inhalation of dust,
- formula for inhalation of volatiles,
- formula for dermal contacts with soils and water. (Refer to Chapter 4: section 4.6; pg 52) [4]
- Define the variables of the expressed formulae. (Refer to Chapter 4: section 4.6; pg 52) [4]
- Describe any two methods involved in dealing with censored data as summarized by Heyworth (1991). (Refer to Chapter 4: section 4.7; subsection 4.7.4; pg 54) [4]