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esm223_03_Lecture_Notes_smallsize

esm223_03_Lecture_Notes_smallsize - Winter 2008 Norm Brown...

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ESM 223 Lecture 3 – Local and Basin-wide Water Quality Conditions Winter 2008, Norm Brown THE BREN SCHOOL OF ENVIRONMENTAL SCIENCE AND MANAGEMENT at the University of California, Santa Barbara Presents Michael Hanrahan CEO, Co-founder The Ocean Channel Tuesday, Jan. 15, 2008 12:30 - 1:30 p.m. Bren Hall 1424 "Communicating the Urgency: The Instrumental Role of Media in Bringing about Change in Environmental Perceptions and Actions...and Fast" Hosted by Dave Panitz and Bren Associate Professor Hunter Lenihan FYI: Overview Introduction to Risk-Based Action and Risk Assessment – Overview of RA Elements Example Classes in Basin Water Quality Issues – Arsenic – Agricultural Dicharges Introduction to other major contaminant classes (chlorinated hyrdocarbons, fuels & MTBE, … ) 4 Risk-Based Action
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5 Risk Assessment Systematic process for: generating estimates of all significant risk factors range of exposure scenarios release of pollutants into any compartment in environment for specific receptors or general population 6 Risk Assessment Answer to these questions: – What could potentially go wrong? – What are the chances that it will happen? – What are the anticipated consequences if this should happen? – Who are the potential receptors? – How likely is it that they will be adversely affected? – Is this probability acceptable? Also useful in determining: – How safe is safe enough? – How clean is clean enough? 7 Risk Assessment • Objectives: – Provide sufficient information to decision makers to make decisions concerning a potentially hazardous condition – Rational allocation of resources to increase safety and/or reduce the risk of exposure to pollutants and the effects on human and environmental health – Determine for a particular site what is the appropriate course of action: monitoring, containment or remediation – Provide guidelines for clean-up levels that are cost- effective and within certain risk objectives Risk Assessment
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