MDEQ sponsored ERA presentation to CAP Meeting
Tittabawassee River Aquatic Ecological Risk Assessment – Results
Background
Tittabawassee River Aquatic Ecological Risk Assessment (ERA) - Objectives
Tittabawassee River Ecological Risk Assessment - Objectives
Tittabawassee River Ecological Risk Assessment – Presentation Structure
Tittabawassee River Ecological Risk Assessment
Tittabawassee River Ecological Risk Assessment – USEPA 1998 Framework
Tittabawassee River Ecological Risk Assessment – Exposure Model
Steps In Aquatic ERA
Tittabawassee River Ecological Risk Assessment – Bird Egg TRVs
Bird Egg TCDD-EQ TRVs
Avian Egg TRVs Used In Previous Risk Assessments
Mammalian Piscivore TRVs
TCDD-EQ TRV - Summary
Fish – Bird Egg BMFs: PCDDs
Fish – bird egg BMFs: PCDFs
Fish – bird egg BMFs
TCDD-EQ in Fish Tissues
Avian and Mammalian TRVs
Estimated TCDD-EQ in Bird Eggs
Actual TCDD-EQ in Bird Eggs From Assessment and Reference Areas
Bird Egg Hazard Indices (HI)
Congeners in Bird Eggs
Mink HIs
River Otter HIs
Mink and Saginaw Bay Carp
Congeners in Fish Prey of Mammals
Hazard Indices - Summary
Sediment Threshold Concentrations (STCs)
Avian and Mammalian STCs
Sediment Threshold Concentration Exceedences
Saginaw River and Saginaw Bay Sediments
Risk Summary
Uncertainty
Uncertainties in ERA
Uncertainty and Robustness of Results of ERA
ERA “Taxonomy Spectrum”
Utility of ERA
Home Page: www.trwnews.net
Other information: This presentation made the October 8, 2003 MDEQ CAP meeting. Additional Dioxin information may be found @ Tittabawassee River Watch www.trwnews.net