EPA air monitoring data table and public health summary, Oct

NYC 9/11 Public Portal Document

In the News - Headlines wysiwyg://4/http://www.epa.gov/air/nyc/mon-e.htrr

US. gwwroftmootal Fwtectfo» EPA Newsroom Honig I Recent Additions | Contact Us Search: j Advanced Search

EPA Newsroom EPA Monitoring Site: Browse EPA Topics • ; ' West End of Liberty St. at South End Ave. ‘Laws,& Regulations ; , Where You Live Asbestos Air Monitoring Data Information Sources This table shows how much asbestos EPA measured in the air at this site, on the Educational Resou rces 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. Pjo g EPA can measure asbestos in several ways. For these data tables, EPA is providing 'Business'-''" ' • measurements in terms of the number of asbestos structures found per square Opportunities millimeter within our air monitors (structures can include single, overlapping, and bundles of asbestos fibers). The level of concern for asbestos is based on i continuous exposure to more than 70 structures per square millimeter for an extended period. Because cleanup efforts will reduce asbestos levels For -S.. I dramatically over the next several weeks, EPA does not expect people exposed to this amount of asbestos to have increased risks of health problems.

Measurement (structures/square Date Time millimeter) 12:01 a.m. to 12:00 not detected 9/30/2001 p.m. 12:01 p.m. to 12:00 133.3* 9/29/2001 a.m. ^:01 a.m. to 12:00 9/29/2001 92.2* p.m. 12:01 a.m. to 12:00 9/28/2001 not detected p.m. 12:01 p.m. to 12:00 9/27/2001 29.64 a.m. 12:01 a.m. to 12:00 not detected 9/27/2001 p.m. 12:01 p.m. to 12:00 29.64 9/26/2001 a.m.

9/26/2001 14.8 p.m. 2:00 p.m. to 7:00 9/25/2001 not detected p.m. 2:00 a.m. to 2:00 9/24/2001 14.8 p.m. 2:00 p.m. to 2:00 9/23/2001 14.8 a.m 4:00 a.m. to 4:00 9/22/2001 14.8 p.m. 4:00 a.m. to 4:00 9/22/2001 DUP 74.1* p.m.

1 of2 10/3/2001 12:59 PM

NYC-WTC_000141081