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NYC-WTC_000199923

Label derived from the City's folder field. The City does not supply document titles.NYC-WTC_000199923–000199926
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NYC 9/11 Public Portal Document

OSHA WTC Sampling Results Page 1 of 4

r 1 U.S. Department of Labor Occupational Safety & Health Administration

4 www.osha.gov j Search| Advanced Search I A-Z Index

OSHA SAMPLING RESULTS SUMMARY AS OF 10/08/2002

Asbestos

A total of 1425 samples (excluding bulk and blank samples) for asbestos have been taken. From 9/13 -9/21, 168 samples were taken in the financial district. Since 9/21, sampling focused on the debris field and those workers working in or immediately next to it. 179 of the samples analyzed exceeded OSHA's limit via PCM analysis. However, upon further analysis using discriminating counting methods and/or TEM analysis, the number of asbestos fibers found dropped dramatically to below detectable levels or well below .1 f/cc.

Carbon Monoxide

127 personal samples of workers on the rubble pile or during demolition operations generally were well below the OSHA permissible exposure limit of 50 PPM. However 2 workers who were both operating gas powered saws near a gas generator were found to be exposed to 73 and 58 ppm up, respectively.

Noise

OSHA is monitoring the noise exposures of employees who perform (or work near) noisy operations such as jack hammering and drilling. To date the 253 samples collected indicate that employee noise exposures range from 73.7 dBA to 110.7 dBA. Sixty-eight samples have exceeded the applicable permissible exposure limit of 90 dBA, mostly for concrete drilling, cutting, and jack-hammering operations. Accordingly, OSHA continues to recommend the use of appropriate hearing protection in noisy operations, and specifically, for concrete drilling, cutting, and jack-hammering operations OSHA recommends dual hearing protection i.e. plugs and ear muff protection.

o Total Dust (PNOR) 1-3

I A total of 176 samples (excluding bulk and blank samples) for total dust in and around the debris field were taken. 5

s a samples were found to be in excess of the PEL for Total dust (ISmg/m^). The highest exposure was found on one operator who was exposed at approximately 4X PEL. o o Respirable Silica I o The overwhelming majority of 1353 silica samples (excluding bulk and blank samples) show no detectable levels of cn LT) http://www.osha.gov/nyc-disaster/summary.html 10/20/2003 S

NYC-WTC_000199923

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NYC-WTC_000199923Source: NYC Law Department, mirrored locally

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