NYC 9/11 Public Portal Document
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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 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
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
Jobs bundles of asbestos fibers). The level of concern for asbestos is based on
Recursos en Espanol continuous exposure to more than 70 structures per square millimeter for an
extended period. Because cleanup efforts will reduce asbestos levels
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:
9/30/2001 not detected
p.m.
12^1 p.m. to 1Z00
9/29/2001 133.3*
a.m.
12:01 a.m. to 12:00:
9/29/2001 92.2*
P-fTl-
12:01 a.m. to 12:00 (
9/28/2001 not detected
p.m.
42:01 p.m? to 12:00 (
9/27/2001 29.64
a.m.
,12:01 a.m. to 12:00
9/27/2001 not detected
: p.m.
il2:01p'm?to 12:00
9/26/2001 29.64
a.m.
9/26/2001
42:01 a.m. to 12:00 ( 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 i
9/24/2001 14.8
p.m.
2:00 p.m. to 2:00
9/23/2001 14.8
a.m
9/22/2001 4:00 a.m. to 4:00 14.8
PITl.
(9/22/2001 DUP: 4:00 a.m. to 4:00 74.1*
p.m.
1 of 2 10/3/2001 12;59PM
CITY_21MC100_002949593
NYC-WTC_000186715
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