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NYC-WTC_000220149
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NYC 9/11 Public Portal Document
CH .“SC.
WTC INDUSTRIAL HYGIENE NOTICE
Date: 03/09/2002
To: Ray Master
CC: DDC- Bob Adams LMIG- John Rabovsky ATC- Mike Donovan LMIG- IHFile
From: Donald Weber
RE: Post-Abatement Clearance Sample Results For 3/8/02
Ray.
Attached are the results of the sampling performed on the asbestos abatement job at WTC 6, B5 level on the captioned dates. These results contain area samples.
All area sample results were below the limit of 0.01 fibers per cubic centimeter (f/cc), which is the standard used for buildings having general occupancy. These results were also below the shift-adjusted exposure limit of 0.05 f/cc for a 12 hour shift.
Seven of the results indicate that the filter was “overloaded”, meaning that the amount of dust collected on the filter was too large to permit an accurate fiber count. Fred Burkhardt from ATC indicated that he will be taking measures to reduce the number of samples reported as “overloaded” in the future.
You should maintain these records as required by state, local, and federal requirements.
Donald A. Weber, Sr., IHIT Senior Industrial Hygienist
Enc. Post Abatement Clearance Sample Results (5 pages)
1
CITY_21MC100_002831792
NYC-WTC_000220149
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NYC-WTC_000220149Source: NYC Law Department, mirrored locally
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