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Quarry Dust

A group is fighting a proposed rock quarry which is of the order of 300 yards
away from the nearest homes. Can someone recommend someone who is familiar
with air quality standards of the US EPA and KY air quality standards and
particulate matter emissions from limestone quarries?  It appears that the
intentions of the regulations are good, but their method of testing leaves a
lot to be desired.  They measure particulates as a % of oppacity of the
air...which seems that a lot of dust is allowed.  Has anyone ever done a
spectral analysis of limestone? to find out if there are enough contaminates
such as chromium, cadmium, lead, mercury--which if pulverized and blown into
the air could lead to health problems.