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Summary Points from B Breakout

Summary Points from B Breakout. For the Pilot – the substance initiates the search and the search identifies the sentinel product function. NOT use category DRIVEN Other schemes identified – Travis and Arms, 1988 – empirical relationship to Kow. CEMC goes beyond this…

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Summary Points from B Breakout

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  1. Summary Points from B Breakout • For the Pilot – the substance initiates the search and the search identifies the sentinel product function. NOT use category DRIVEN • Other schemes identified – Travis and Arms, 1988 – empirical relationship to Kow. CEMC goes beyond this… • Uncertainties associated with phys-chem Src Epi Suite are acknowledge but generally considered to be small compared other uncertainties in the model.

  2. Summary Points from B Breakout • Local hot spots versus average region concentration seen as large issue. • Substance Specific Approach • AIR, WATER, Food (with food being least effected) • Standardized approach scaling local modeling concentration from stack or fugitive air emission versus general regional model estimate. Do a similar treatment for water. • Per capita Approach

  3. Summary Points from B Breakout • Suggested there could be less detail in the human dietary exposure assessment for the FFComET especially relative to game. • Incentives are obvious – more data means less assumptions and low exposure estimate; however, it is extremely difficult to do for a single company in today’s environment. • Even generic information on mode of entry could be important and helpful information for the model. • Building on this workshop to develop further interaction with industry on “identifying key questions” for model development.

  4. Summary Points from B Breakout • Quantities and mode of entry remain significantly uncertain input – further complicated by competitive pressure. • Possibilities of using “read across” for DSL substances with similar use and structure. • “Testing” , “validation”, “ground-truthing” of FFComET as a possibility. • Backcalculating from an Allowable Daily Intake to an environmental emission rate.

  5. Summary Points from B Breakout • Question of when preliminary FFComET model and documentation will be available.

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