Air monitoring data summary, NYC DOH, Sep 2001

NYC 9/11 Public Portal Document

DRAFT

Agency Date Location N N above N above Maximurn Comment samples 0.01 OSHA (fibers/cc) fibers/cc * PEL@ NYC-DEP 9/24/01 5 schools, distant 15 0 0 0.008 by Highest was PS64, 600 East 6“’ from controlled zone PCM Street (no TEM analysis done). US Public Health 9/18/01- Fresh Kills Landfill 10 9 0 0.07 by No TEM analysis was done. Service 9/19/01 PCM 9/19/01 Inside controlled 2 1 0 0.019 by No TEM analysis was done. zone PCM

* Approximately equivalent to indoor clearance level for residences or schools. EPA results by TEM method, NYC-DEP by PCM @ 0.1 fibers per cc by PCM method; US-OSHA permissible exposure limit for 8 hour time weighted average.

Interpretation: Dusty work in control zone or Fresh Kills Landfill continues to have the potential to generate elevated levels of asbestos fibers. Continued use of appropriate respiratory protection for workers in or near potentially dusty locations or tasks is indicated. Dust suppression measures should be enhanced. Additional personal monitoring underway.

n H

3: n o o I

CD Draft: 9/25/01, 11:45 PM \EnvironmentalMonitoringUpdate_9_25[l] to bO Page:2 of 6 cn co

NYC-WTC_000176291