Network Refinements During the Pilot Study Phase ACWI February 21, 2008 - PowerPoint PPT Presentation

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Network Refinements During the Pilot Study Phase ACWI February 21, 2008

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  1. Network Refinements During thePilot Study PhaseACWIFebruary 21, 2008

  2. Refinements • Nutrient Monitoring Specifications • Specifying Contaminants (toxics) • Monitoring Wetlands • Atmospheric Deposition • Biology

  3. Nutrient Refinements Refinement Workgroups: • EPA • Headquarters • Regions • Laboratories • NOAA - National Ocean Service • USGS – Various Water Science Centers • Three Pilot Study Agencies • State Agencies • University Groups

  4. Nutrient Refinements • Determine the specific constituents to be monitored • Total or dissolved ? • Sediment? • Methods used should be operational rather than approaches designed for research • Details to address major management issues

  5. Nutrient Refinements Recommendations: • Nutrient Analyses in Tiers • Essential • Useful • Added: • Response variables • Ancillary analyses

  6. Specifying Contaminants Original Level of Detail: • Metals and metalloids • Bulk organics • Volatile organic compounds • Pesticides • Halogenated hydrocarbons • Polycyclic aromatic hydrocarbons • Contaminants of new and emerging concern Estuaries, Rivers, Great lakes & GW in some instances

  7. Specifying Contaminants • Approach: • Provide more detail in each category • Recognize the high cost of analyses • Distinguish between National and regional roles • National: • Clean Water Act coverage • Support other on-going responsibilities • Methods development & risk assessment • Regional • Understanding the locations and concentrations • Reduce sources • Chart progress

  8. Updated Contaminants List New Level of Detail: • Metals and metalloids 28 • Bulk organics • Volatile organic compounds 51 • Pesticides 34 • Halogenated hydrocarbons 53 • Polycyclic aromatic hydrocarbons 47 • Contaminants of new and emerging concern

  9. Monitoring Wetlands • Original Design: • Recognized wetlands need to be a monitored component • Declined to specify how it would be done • Now, we see: • EPA planning one of the “National Surveys” of wetlands in 2011 • Our Pilot Study agencies have actively addressed wetland monitoring needs

  10. Wetlands Monitoring Specification • Adopts three tiers of monitoring: • Tier 1: Landscape level to classify • Tier 2: Rapid visual assessment • Tier 3: Detailed study of • Pore and channel water • Sediments • Biota and function

  11. Atmospheric Deposition • The original design was very general • Assigned details to regional area • It noted the importance of measuring wet and dry deposition, noted the several existing networks • The update is more structured • Benchmark stations & Support stations • Knowledge Gaps • Recommended analytes • Recommends the CMAQ model

  12. Atmospheric Deposition • “Supporting stations” already exist • Coastal “Benchmark stations” needed for full coverage: • Wet Deposition • Dry Deposition • Micrometeorology • Speciated mercury • PBTs

  13. Biological Monitoring • Original design was general • Known issues are being pressed by EPA’s National Surveys • Probability & Gradient studies • Methods • Abundance, diversity • Reference sites • The Network is in a good position to use the procedures that gain consensus, but cannot plan to use them yet

  14. Specifying Contaminants • Original Level of detail: • Metals and metalloids