Facsimile cover sheet for chain of custody documents, February 2002

NYC 9/11 Public Portal Document

02/20/2002 05:48 2129240844 KPROPERTIES PAGE 05

Ms. Susan Donahue October 24,2001

OSHA

OSHA has-been providing assistance in protecting the health of workers involved in recovery and emergency response. Most if not all of their data has been collected in the immediate vicinity of -the debris pile. Therefore, contaminant levels downwind are expected to be much lower. It is also important to note that OSHA's conclusions are usually based on occupational exposure limits. More stringent limits' are typically applied to the general public.

Statements:

Workers on the should take appropriate steps to protect themselves, but there is not threat site

to the public. Our samples indicate, there is no evidence of significant levels of airborne asbestos or other contaminants beyond the disaster site itself.

Sampling:

• Carbon monoxide: 15 samples rouged from 1— 28 ppm. Exposure to workers on the debris pile-welt below the OSHA standard. • Siliea: 92 samples. Overwhelming majority have no detectable levels of silica. The highest result was'twice 'the OSHA limit. The next highest level was less that half the OSHA limit. • Freon; Containers in building found intact. No need to sample. • Metals- 4 of 163 samples -exceeded limits for Fe, Pb, Cd but all were personal samples on workers conducting torch cutting. • VOCs: 70 samples. Results in elevated, but personal and area sampling results plume

below OSHA limits. Analyzed for VOCs such as: -Acrylonitrile o

o Benzene Aldehydes such as Formaldehyde .o

o Styrene o Xyiene o Vinyl chloride

New York City Department of Health Public health advisory Has issued some statements.and information, but defers to EPA for data. issued. Recommends: • Avoid strenuous activity Avoid sweeping or other outdoor maintenance • Keep dust out of house • Keep windows closed

NYC-WTC 000131057