Because of budgetary constraints, the monitors which collect air
samples don't operate everyday, but instead collect samples on a once
every six day schedule, or a once every twelve day schedule.
These schedules were chosen to be consistent with EPA practice.
The question has arisen as to whether the data gathered by the once
every six day method is of ``sufficiently higher'' quality than the
once every twelve day data to justify the added cost that is incurred
by the former.  The practical implication is that, given the budget
constraints placed on the monitoring program, if the AQD could
safely go to a once every twelve day schedule, the money that would
be freed up could be used to purchase and operate additional
monitors in other parts of the state. This would provide greater
geographic coverage and potentially a better idea of the overall
quality of ambient air in Michigan, and the efficacy of the Division's
programs.

The goal of this project is to answer this question and perhaps one
of broader utility: how can one quantify the ``quality'' of monitoring
data in order to perform a meaningful benefit-cost analysis.

The ideal completed project deliverable would be an optimized
cost-quality air sampling program for non-criteria toxics.

This summary prepared with the assistance of D. O'Brienand C. A. Simon
of the Michigan Department of Environmental Quality.