NYC 9/11 Public Portal Document
OSHA SAMPLING RESULTS SUMMARY AS OF 3/11/02
Asbestos: A total of 1136 samples (excluding bulk and blank samples) for asbestos have
been taken. From 9/13 -9/21,177 sauries were taken in Ac. financial district
Since 9/21, sampling fbeuaed on toe debris field and those workers working in
vr immediately n«ct to it- 144 of the samples analyzed • exceeded OSHA’s
limit via PCM analysis. However, upon farther analysis using discriminating
counting methods and/or TEM analysis, Ae number of asbestos fibers found
dropped dramatically to below detectable levels or well below. 1 ffec.
Caribon Monoxide: A total of 103 personal samples of workers on Ae rubble pile showed results
ranging from 1 ppm tO 34 pptD Which are well below Ae OSHA pernris-rihle
exposure limit of SO PPM.
Noise: OSHA is monitoring Ae noise exposures ofemployees vAo perform (or work
near) noisy operations truch as jack hammering and drilling. To date Ae 131
samples collected indicate that employee noise exposures range from 73.7
dBA to 110.7 dBA Twenty sample have exceeded Ae applicable pennissible
weposure limit of 90 dBA, mostly for concrete drilling, cutting, and Jack
hammering operations. Accordingly, OSHA continues to recommead the use
of appropriate hearing proteciiuu In noisy operations, and specifically, for
concrete (hilling, cutting, and jack-hammering operations OSHA recommends
dual hearing protection i.e. plugs and ear muff protection.
Total Dust (PNOR) A total of 150 samples (excluding bulk and blank samples) for total dust in and'
around Ae debris field were taken. 5 samples were found to be in excess of
Ae PEL for Total dust (15mgto3). The highest exposure was found on one
operator who was exposed at approximately 4X PEL.
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