NYC-WTC_000199723

NYC 9/11 Public Portal Document

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EPA Monitoring Site: Rector Pl. and South End Ave.

Asbestos Air Monitoring Data

This table shows how much asbestos EPA measured in the air at this site, on the d times shown. Daily summaries of this data and how it compares to the level of cor public health are provided on the EPA home page.

EPA can measure asbestos in several ways. For these data tables, EPA is providing measurements in terms of the number of asbestos structures found per square milli within our air monitors (structures can include single, overlapping, and bundles of asbestos fibers). The level of concern for asbestos is based on continuous exposure more than 70 structures per square millimeter for an extended period. Because de efforts will reduce asbestos levels dramatically over the next several weeks, E does not expect people exposed to this amount of asbestos to have increased ri health problems.

Date Time Measurement (structures/square mill 12:01 a.m. to 12:00 9/30/2001 not detected p.m. 12:01 p.m. to 12:00 9/29/2001 88.9* a.m. 12:01 a.m. to 12:00 9/29/2001 DUP 29.6 p.m, 12:01 a.m.to 12:00 9/29/2001 not detected 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 14.8 a.m. 12:01 a.m. to 12:00 9/27/2001 not detected p.m. 12:01 p.m. to 12:00 9/26/2001 not detected a.m. 12:01 a.m. to 12:00 9/26/2001 14.8 pm._______ j 9/25/2001 2:00 p.m. to 7:00 p.m. [ not detected

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