NYC-WTC_000208454

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US. EtwIntunttittI ProMctfOA Agucy EPA Newsroom Home I Recent Additions | Contact Us Search: [ Advanced Search I EPA Newsroom EPA Monitoring Site: Browse EPA Topics West St. (Center Island) Between Barclay & Murray St. Laws & Regulations Asbestos Air Monitoring Data Where You Live Information Sources This table shows how much asbestos EPA measured in the air at this site, on the Educational Resources dates and times shown. Daily summaries of this data and how it compares to the About EPA level of concern for public health are provided on the EPA home page. Programs Business EPA can measure asbestos in several ways. For these data tables, EPA is Opportunities providing measurements in terms of the number of asbestos fibers found per square millimeter within our air monitors. The level of concern for asbestos is Jobs based on continuous exposure to more than 70 fibers per square millimeter Recursos en Espahol for an extended period. People exposed to any amount of asbestos up to this level are not expected to have increased risks of health problems. For Kits Date Time Measurement (fibers/square millimeter) 9/24/2001 2 a.m. to 2 p.m. <14.8** ~ 9/23/2001 2 p.m. to 2 a.m.(9/24) 291

** The technique used to analyze these samples cannot generally produce a reliable measurement below 14.8 fibers per square millimeter, which is well below the level of concern (70 fibers per square millimeter).

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 HUH ^rom the Department of Health and Human Services’ Web site.

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