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Co-Located Lead Sample Result for Working Hours

July 20 and 22, 2009

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.  The current                                                                                       standard for the Site is 1.5 µg/m3.

Date

Sample ID

Sample Location

Result µg/m3

 Co-located with
7/20/09 072009-WH-AM1 East of the Containment Area, downwind of Containment Area Material. 0.320 * Air Monitor #1
7/20/09 072009-WH-PDS Delaware Street perimeter fence line. 0.155 * Not co-located with a dust monitor.
7/22/09 072209-WH-AM6 South of the Containment Area; additional Sulphur Creek monitoring. <0.063 * Air Monitor #6
7/22/09 072209-WH-PSC South of the Containment Area; Sulphur Creek monitoring. 0.116 * Not co-located with a dust monitor.

* Note: These sample results may have been affected by blank contamination (click here for an explanation)                                                                                           and thus may overestimate the lead present in the air when the sample was taken. 

 

Page Last Modified Tuesday March 02, 2010 02:45:47 PM

 

 

 

 

 

 

 

 

 

 

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