Preliminary Environmental Assessment report, Jan 2006

NYC 9/11 Public Portal Document

Environmental Characterization Report Fiterman Hall, 30 West Broadway, New York, NY Airtek Project #05-0867-- January 10, 2006

recorded on a chain-of-custody form and submitted to a laboratory accredited by NYS DOH NELAC and the American Industrial Hygiene Association ("AIHA") to perform analysis for metals in dust wipes according to the NIOSH 7300 (modified) analysis methodology.

4.4 Asbestos Containing Materials (ACBM) Survey

The asbestos inspection and bulk sampling procedures implemented were based on the guidelines established by the U.S. EPA in the Guidancefor Controlling Asbestos Containing Materials in Buildings, Office of Pesticides and Toxic Substances, DOC #560/5-85-024 and 40 CFR Part 763, Asbestos Hazard Emergency Response Act (AHERA). Field information was organized according to the AHERA concept of Homogeneous Area (HA). A HA is defined as a suspect material of similar age, appearance, function, and texture. Each material was grouped together as a specific HA, sampled, and then assessed for condition.

Every accessible area and space of the Building, including the Roof, was physically inspected to determine the presence or absence of suspect ACM. Representative interstitial spaces were accessed to confirm the information contained in the reports of previous asbestos abatement projects.

4.5 Lead-Based Paint Survey

Where inspection revealed the presence of painted older building components, a portable battery powered X-Ray Fluorescence (XRF) scanner was used to read and analyze lead concentration of dried paint on surfaces. Readings equal to or in excess of 1.0 mg/cc if lead based on XRF analysis would be reported as lead-based paint. When the reading classification obtained from a surface has been determined to be within the inconclusive range, confirmation testing would be carried out by collecting a sample for laboratory analysis.

4.6 WTC COPC Impact Characterization Testing

4.6.1 Surface Sampling

Surface wipe sampling was conducted on a variety of surfaces regardless of dust loading. 11

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