• The committee will also provide recommendations for making improvements in the Army’s proposed methodology for assessing these combined exposures. The committee will also provide recommendations that will yield more precise measurements of gases which might be useful in hazard assessment.

THE COMMITTEE’S FIRST REPORT

The committee divided its work into two reports. In the first report due by September 2007, the committee considers whether the hazards presented from combined exposures at low levels warrant a combined assessment. The committee then considers whether the HQ approach is a reasonable approach to assessment of the combined exposures. The committee approached its task by reviewing the toxicity data on CO and HCN singularly and in combination. The committee also heard presentations from representatives of academe, EPA, and ATSDR. The committee relied primarily on published peer reviewed data.

THE COMMITTEE’S SECOND REPORT

In the second report, the committee will determine the following:

  1. Is the approach discussed in the technical context section appropriate or an alternative assessment method should be developed and validated through either field or laboratory study?

  2. What improvements are needed in the Army's proposed methodology for assessing these combined exposures? The committee will also provide recommendations that will yield more precise measurements of gases which might be useful in hazard assessment.

  3. What exposure limit guidelines are appropriate for combined exposures to these chemicals?



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