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Analyses in Support of the Development of the PBT Monitoring Strategy. Tim Watkins and Stan Durkee EPA / ORD. Purpose. Currently, we are undertaking analyses addressing mercury, dioxin and PCBs to:

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Analyses in support of the development of the pbt monitoring strategy

Analyses in Support of the Development of the PBT Monitoring Strategy

Tim Watkins and Stan Durkee

EPA / ORD

PBT Monitoring Strategy Workshop


Purpose
Purpose Strategy

  • Currently, we are undertaking analyses addressing mercury, dioxin and PCBs to:

    • Enhance our understanding of current monitoring programs addressing various media and the extent to which partnerships and information-sharing exist;

    • Assess these PBT monitoring programs against our draft Strategy objectives; and,

    • Provide insight and information to help refine our draft Strategy objectives.

PBT Monitoring Strategy Workshop


Specific analyses
Specific Analyses Strategy

  • Assessment of current monitoring programs.

  • Evaluation of Hg monitoring sites in one network using modeled Hg deposition values.

  • Investigation of EPA fish tissue study design.

  • Dioxin modeling exercise.

PBT Monitoring Strategy Workshop


A multimedia matrix for monitoring selected pbts an analytical tool
A Multimedia Matrix for Monitoring Selected PBTs (An Analytical Tool)

PBT Monitoring Strategy Workshop


Initial focus on mercury
Initial Focus on Mercury Analytical Tool)

  • A lot of interest and activity

  • Data availability

  • Major monitoring programs in all media

PBT Monitoring Strategy Workshop


Mercury monitoring
Mercury Monitoring Analytical Tool)

  • Can national strategy objectives be developed for individual media?

  • Can national strategy objectives be developed to link multimedia monitoring systems?

  • To help answer these questions, we are first examining the mercury deposition network (MDN).

PBT Monitoring Strategy Workshop


Mercury deposition network
Mercury Deposition Network Analytical Tool)

  • A collaborative network sponsored by over 100 state and federal agencies, native American tribes and others.

  • In 2000, more than 50 sites in operation.

  • Collects weekly wet-only samples of precipitation at sites worldwide, analyzing total mercury (also methylmercury at 1/3 of the sites).

PBT Monitoring Strategy Workshop


Modeling can support monitoring design
Modeling Can Support Monitoring Design Analytical Tool)

  • EPA modeled, using RELMAP, the domestic long range transport of U.S. emissions and reported the results in the 1997 Mercury Study Report to Congress.

  • For this analysis, we have evaluated MDN monitoring sites against our Strategy objectives using the modeled results of Hg wet deposition.

  • A detailed description follows this presentation.

PBT Monitoring Strategy Workshop


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