WTC OSHA Asbestos Sampling Data for C4
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Permissible Exposure Limit (PEL): 0.1 fiber/cubic centimeter as an 8-hr time weighted average.
Excursion Limit: 1 fiber/cubic centimeter over a 30-minute period.

DATE Location # of Samples Sample Type Fibers /cc
9/13 Water & Broad St. 1 Personal 0.003
9/15 Wall & S. William to Pearl & State Streets 4 Personal <0.026-0.051
9/15 Broadway & Wall to S. William & Mill Lane 4 Personal <0.026-0.035
9/16 Water & Wall to Beekman & Pearl Streets 1 Personal 0.006
9/16 Exchange Place & New St. 1 Personal 0.009


DATE Location Sample Type Fibers/cc TEM fibers/cc
9/18 New & Beaver Area <0.005 none
9/21 Corner of Water & Vietnam Vet. Plaza Area <0.006  
9/21 Corner of New & Beaver Area <0.05