| There are six high-volume (HV)
air samplers to monitor the site. Samples are collected over a
24-hour period every six days and have been collected since January 1989.
Put your cursor over the
name of a location to view air data from November 8, 2009.
(Firefox users click here for a
summary table.) You can also read a
summary of the
2nd Quarter 2009 air data or view
historic air data.
On October 15, 2008, the
United States Environmental Protection Agency (USEPA) lowered the National
Ambient Air Quality Lead Standard from a quarterly average of 1.5 µg/m3 to a
rolling three-month average of 0.15 µg/m3, effective October 2009. The
method of collecting the samples did not change. All results are below
the current standard for the Site of 1.5 ug/m3 and below the revised NAAQS
standard of 0.15 ug/m3.
*HV = High Volume air sampler.
Click here for an explanation.
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