| The non-working hours
ambient air monitoring samples are being collected from high
volume air samplers (HV-1, HV-2, HV-3 and HV-4). An additional sample
was also collected from a fifth sampler along the Sulphur Creek side of the
Site. Put your cursor over the
name of a location (HV-1,
HV-2, HV-3, or HV-4) to view
non-working hour ambient air data from
January 2, 2009 to January 5, 2009.
The result for the sample
collected along the Sulphur Creek side of the Site (south of where the the
old basin is shown on the drawing below) was 0.005 ug/m3.
(Firefox users click here for a
summary table.)
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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