NYC-WTC_000199611

NYC 9/11 Public Portal Document

November 7, 2001

To whom it may concern:

The New York City Department of Health (NYCDOH) and the United States Department of Health and Human Services Agency for Toxic Substances and Disease Registry (ATSDR) are jointly implementing an ambient and indoor air sampling plan for public health evaluations of residential areas near the World Trade Center (WTC).

The overall objective of this sampling is to provide results upon which public health agencies can further determine the potential for environmental exposures to WTC collapse-related materials and possible health implications of the exposures. The specific focus of the sampling will be to characterize the rnake-up and size distribution of settled dust and airborne breathing zone dust in residential areas - both indoors and outside - near the WTC.

The sampling will be conducted over the course of one day and will generally concentrate on apartments that were among the most impacted in the building. We will specifically be sampling for the following parameters in air: asbestos, particles of varying sizes, and silica. Dust samples will also be collected and analyzed for asbestos, silica, mica, fiberglass, gypsum, calcite, magnesium, and pH.

Your willingness to participate in this critical public health sampling plan is greatly appreciated.

Any questions you may have regarding the Indoor Sampling Plan can be directed to Christopher D’Andrea, MS of NYCDOH at (212) 7884290 or (212) 788-4285.

Sincerely,

Jessica Leighton, PhD Assistant Commissioner Environmental Risk Assessment and Communication

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NYC-WTC_000199611