Question 2 Discuss how the EPA recommends that risk assessors distinguish between uncertainty and variability in a risk assessment. Your response should be at least 200 words in length. You are required to use at least your textbook as source material fo

Question 2Discuss how the EPA recommends that risk assessors distinguish between uncertainty and variability in a risk assessment.Your response should be at least 200 words in length. You are required to use at least your textbook as source material for your response. All sources used, including the textbook, must be referenced; paraphrased and quoted material must have accompanying citations.Question 3Differentiate between the roles of risk managers and risk assessors according to the EPA’s Guidance for Risk Characterization.Your response should be at least 200 words in length. You are required to use at least your required reading as source material for your response. All sources used, including the textbook, must be referenced; paraphrased and quoted material must have accompanying citations.Question 4What is the hazard quotient, and at what stage of the risk assessment process is it used? Discuss the three possible levels of the hazard quotient and how the hazard is evaluated if a mixture of chemical exposures is being assessed.Your response should be at least 200 words in length. You are required to use at least your textbook as source material for your response. All sources used, including the textbook, must be referenced; paraphrased and quoted material must have accompanying citationsQuestion 2What is the difference between in situ and ex situ treatment at abandoned hazardous waste sites? Explain how contaminated soil might be treated ex situ, and how it might be treated in situ.Your response should be at least 150 words in length. All sources used, including the textbook, must be referenced; paraphrased and quoted material must have accompanying citations.Question 1Describe the impact that temperature changes can have on environmental systems in relation to carbon, nitrogen, and sulfur. How can temperature influence the byproducts of incineration?Your response should be at least 150 words in length. All sources used, including the textbook, must be referenced; paraphrased and quoted material must have accompan