NYC-WTC_000204907

NYC 9/11 Public Portal Document (FBI) 9.28-01 9:26/ST. 9 : 2 2/NO, 4 86 1 2 9 1 38 0 P 8 FROM OSWEK-QSUar-LO wysiwyg://50/http;//www.epa.gov/epahome/nion-q.hti

U.S.

EPA Newsroom Home I Recent Additions | Contact Us Search: C “T €0^ Advanced Search

EPA Monitoring Site; Browse EPA Topics ' West St. (Center Island) Between Barclay & Murray St. Laws & Regulations Where, You Live i Asbestos Air Monitoring Data 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 fePA ■ level of concern for public health are provided on the EPA home pace. Prograins EPA can measure asbestos in several ways. For these data tables, EPA is providing Busine'iis ' measurements in terms of the number of asbestos fibers found per square Opportunities millimeter within our air monitors. The level of concern for asbestos is based on Jobs continuous exposure to more than 70 fibers per square millimeter for an Recursds en Espanol extended period. People exposed to any amount of asbestos up to this level are not expected to have increased risks of health problems.

E J??*® iC „ Time :[ Measurement (fibers/square millimeter) ' 19/24/206 l i) 2 a.m. to 2 p.m. | <14.8- j[9/23^d?ijVp.m. to 2 a rn.(9/24)“i[~^^^ ""29?6

** 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 Department of Health and Human Services' Web site. ■■■I from the I EPA Newsroom | FAQs This page originally created: Wednesday, September 26,2001 EPA Home I Privacy and Security Notice I Contact Us Last Updated: Thursday, September 27, 2001 09.44:16 URL: http:/Zwww.epa.gov/epahome/mon-q.htm

of 1 9/28/2001 8:56 AM CITY_21MC100_0 08986632

NYC-WTC_000204907