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INHALATION EXPOSURE AND INTAKE DOSE MODEL IMPROVEMENTS
GRAHAM, S. E., J. M. BURKE, T. R. MCCURDY, H. D. RICHMOND, AND J. LANGSTAFF. INHALATION EXPOSURE AND INTAKE DOSE MODEL IMPROVEMENTS. Presented at EPA Science Forum 2005, Washington, DC, May 16 - 18, 2005.
The two main objectives of this research are (1) to improve and update and (2) to analyze the CHAD database.
For objective 1, we will
* Reconfigure the CHAD program into a completely modularized Oracle database.
* Redesign User Interface for effcient utilization of the program's capability.
* Obtain dates for those surveys that did not provide them to us, so that we can obtain associated meteorological/climatic inputs for the person-days of information without them.
* Revise the upper and lower bound delimiters in the energy expenditure distributions used for activity-specific estimates.
For objective 2, we will
* Evaluate data quality.
* Evaluate trends and activities for various subgroups.
* Identify temporal patterns for longitudinal data.
* Characterize resolution required for output for exposure and dose models.
This presentation highlights recent human exposure model improvements and products developed by the EMRB in coordination with scientists in the OAQPS and provides insight into how these products are used by the OAQPS in its regulatory process. Besides providing a status report of inhalation model developments and improvements, work planned to evaluate the performance and efficacy of the SHEDS and OAQPS models is also discussed. Findings from these model evaluation projects are expected to provide detailed guidance on future EMRB research planning and program development.