Inter-agency buildings and parks meeting coordination, April 2002

NYC 9/11 Public Portal Document

IV. Samoline Parameters

Parameter Sample Type Indoor/Outdoor Rationale for Selection

Asbestos breathing ht., 1/O Known use in building construction, evidence of time-weighted presence in early air sampling and in settled dust, air known inhalation carcinogen

Inhalable (<I00µm)" breathing ht., 1/O To determine relative amounts of each air fraction present thoracic (<l0µm)" time-weighted, and to have each fraction analyzed for silica, gypsum, respirable (<4µm)" air mica, fiberglass, and calcite to qualitatively respirable (<2.5µm) determine potential hazards Respirable breathing ht., 1/O Known component of concrete, evidence of crystalline silica time-weighted, presence in some settled dust samples, known air inhalation carcinogen. pH" dust 1/O Concrete has a high pH, if dust has a high pH, it may be contributing to reported symptoms of eyes, nose, and throat (ENT) irritation

Asbestos" dust I/O Determine if asbestos is present in dust gypsum, silica, "mica, dust I/O Associated with building materials (concrete, fiberglass, calcite drywall) and known to be irritating to ENT

results will be used to better understand the potential for ENT and respiratory irritation, and possibly for determining the possibility of acute/chronic health problems. Results will assist in providing information/recommendations to the public (e.g., what is contributing to irritation, how to reduce exposures) to assist in characterizing dust that can become airborne (re-entrainment of settled dust that may be the source of continuing air contamination), and to make recommendations for outdoor dust remediation

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NYC-WTC 000159840