(2 of 4)
Prepare box plots of concentrations by day
of week; compare results to expected
patterns of local emissions
Do species show any day-of-week
Compare monitor-level data to national-
How do concentrations compare to other
locations, risk levels, remote background,
or reference concentrations?
Prepare box plots of concentrations by
season, month, and time of day; compare
to national results and expectations based
on local conditions
How do these species vary by
measurement season, month, and time of
Are findings consistent with national
Determine median concentrations and
concentration ranges and compare to
appropriate risk levels
What are the most abundant air toxics at
each site on a risk-weighted basis?
What is the nature and extent of air toxics problems in your area?