1. CE 3231 - Introduction to Environmental Engineering and Science Readings for This Class: Chapter 4 O hio N orthern U niversity Introduction Chemistry, Microbiology & Material Balance Water & Air Pollution Env Risk Management Exposure Assessment People all act with remarkable similarity. Understanding average exposures received from environmental pollution is actually a study in behavior analysis. Here we look at the quantitative nature of exposure analysis.

2. Risk & Risk Assessment  What is risk  What are the four steps of risk assessment

3. Lecture 31 Exposure Assessment (Risk II)

4. Risk & Risk Assessment  Topics Covered Include:  Ecological vs Human Health Exposure  Talking through ways we are exposed  Calculating Chronic Daily Intake (CDI)

5. Quantitative Risk Assessment To Quantitatively assess the risk we need to quantify: 1. Magnitude, frequency, and duration of every pathway of exposure 2. biological characteristics of receptors (body weight, absorption,etc.) 3. Potency (dose-response) character of agent

6. Exposure Assessment Examples Ecological Risk

7. Exposure Assessment Examples Human Health

8. Exposure Assessment Examples Fragrance Ecological &Human Health

9. Exposure Assessment Examples Land Application – Industrial Organic Ecological & Human Health

10. Calculating total dose for one example Chronic Daily Intake CDI dermal + CDI ingestion + CDI inhalation = total dose - injestion = food + water (incidental or purposeful) CDI for individual routes of exposure on handout

11. One can answer… What is your current dose and how dose your dose compare to existing standards? What dosage would violate the existing standards? Which exposure is responsible for the dose? Which exposure is most critical (health outcomes)?