Notice regarding elevated occupational exposure levels to quartz, asbestos, and other agents at the World Trade Center site in late 2001.
NYC-WTC_000186529–000186530
OCR status: ok · source: pdftotext
NYC 9/11 Public Portal Document
LIBERTY! MUTUALS
Industrial Hygiene Air Sample Results Summary for Weeks of 12/21/01 to 01/04/02
OSHA PEL - This is the Permissible Exposure Limit (PEL) for the highest analyte. PELs are established by an OSHA rule-making process and are the legal occupational exposure standards.
ACGIH TLV - This is the Threshold Limit Value (TLV) for the highest analyte. TLVs are voluntary guidelines for occupational exposure which are established by the American Conference of Governmental Industrial Hygienists, a private professional organization.
Highest Result / % of OEL - This is the percentage of the occupational exposure limit (OEL) that the highest result represents. This is the value in the “Highest Result” column divided by the lower of either the PEL or TLV and converted to a percentage.
#of NQs - This is the number of analyses that reported that concentration as “not quantifiable” (NQ).
% of NQ - This is the percent of the total analyses which were reported as “not quantifiable”.
If you have any questions concerning this information or would like further details about these results, feel Ifee to contact the Liberty Mutual Industrial Hygienist on duty @ 917-566-2576.
Donald A, Weber, Sr.. MT Senior Industrial Hygienist Liberty Mutual Insurance Group
CITY_21MC100_003130710
NYC-WTC_000186530
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NYC-WTC_000186468
Summary report of air monitoring results including lead and quartz concentrations for workers at the World Trade Center site.
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Joint OSHA and Bechtel crane inspection report analyzing safety conditions at the World Trade Center site.
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NYC-WTC_000186468
Summary report of air monitoring results including lead and quartz concentrations for workers at the World Trade Center site.
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