NYC 9/11 Public Portal Document
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' UNITED STATES ENVIRONMENTAL PROTECTION AGENCY
IR ~ WASHINGTON, D.C. 20460
IC OFFICE OF
SOLID WASTE AND EMERGENCY
RESPONSE
MEMORANDUM
DATE: December 19, 2001
SUBJECT: ■ Wipe sampling for asbestos in Lower Manhattan
■ Projection of airborne levels from settled WTC dusts
■ Estimation of Increased cancer risks based on
various WTC dust exposure scenarios
FROM: Cate Jenkins, Ph.D.
Waste Identification Branch (Mail Code 5304 W)
Hazardous Waste Identification Division •
C
TO: Affected Parties and Responsible Officials
The following memorandum provides information on taking wipe samples of settled dusts inside
buildings in Lower Manhattan that resr'ted from the collapse of the World Trade Center (WTC).
Studies are discussed which correlate the amount of asbestos that will become airborne
(resuspended) because of activities such as sweeping, athletic activities, etc. Information is
provided on the cumulative exposures (total doses) found by the Agency for Toxic Substances
and Disease Registry (ATSDR) to be associated with asbestos-related health effects, and
examples are given how to;use this information to calculate doses of asbestos from the WTC
disaster. Finally, a brief section explains the different methods for analyzing and reporting
asbestos levels.
The air' . ;s, projections, and opinions in this memorandum represent my own professional
judgement and are not intended to be construed as any official position or recommendation by
the U.S. Environmental Protection Agency. This memorandum is not intended as any final risk
assessment risks from continued and past exposures to asbestos, and has not been reviewed by
EPA. The data is too incomplete at this time for any complete projection of risks, and there are
too many methods available for performing such projections. My attempt was intended only as a
point of discussion prior to more rigorous assessments.
NYC-WTC 000125934
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