EPA air monitoring data table regarding asbestos levels

NYC 9/11 Public Portal Document

In the New.s - Headlines wvsiwyg://4/hlto://vvw\v.cpa.gov/air/nyc/mon-c.hln

10:00 a.m. to 3:00 120* I 9/21/2001 i p.m. : 2:00 a.m? to 10:00 ! 9/20/2001 not detected a.m. j 5:00 p.m. to 2:00 9/19/2001 not detected a.m. : 2:00 a m. to 10:00 9/19/2001 not detected a.m. 9/18/2001 ;8:00 a.m. to 8 p.m. not detected 8:00 p.m. to 8:00 9/16/2001 27.4 a.m 19/16/2001 DUP i 13.7

8:00 p.m. to 8:00 : 9/15/2001 53.3** a.m. 8:00 p.m. to 8:00 ' 9/15/01 DUP 90** a.m. 8:00 p.m. to 8:66 9/14/2001 48' a.m.

* This reading exceeds the EPA benchmark. It may not indicate increased risk, however, because these are "snapshots," rather than long-term exposure measurements. Weather and recovery activities al the World Trade Center can cause temporary variations in asbestos levels that affect these snapshots.

**Best estimate; no flow information available.

DUP - indicates that more than one sample was taken at a particular time; all values are reported.

There may be gaps in daily readings because of relocated construction equipment and variations in sampling locations.

For more information about asbestos, see the fact sheet inmiiin ||.^g Department of Health and Human Services' Web site.

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This page originally created: Wednesday, September 26, 2001

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