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Ambient Dust Sampling Protocol Near WTC, Oct 2001

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Draft protocol for assessing airborne and settled dust exposures in residential areas following the World Trade Center collapse.

NYC-WTC_000153258–000153278
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NYC 9/11 Public Portal Document

****DRAFT Version 10, October 29, 2001****

VIL Interference from existing bldg materials:

It is anticipated that some of the contaminants/r aterials found in this sampling effort will be un­ related to the WTC event. Attempts will be made during sample collection to note other possible sources of contaminants (Section VIII, Information Needs for Samples/Sample Locations).

To better determine if contaminants/materials found are within area background levels, approximately ten residential units outside of the concentric circle zones will be selected testing '■ (indoor air and surface dust, outdoor air and surface dust). Background levels, along with specific sample location information will be considered when data interpretation is conducted.

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NYC-WTC_000153265Source: NYC Law Department, mirrored locally

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