ATSDR/DHAC protocol for ambient and surface dust sampling near WTC,

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■D o c o IV. Sampling Parameters: CT o Parameter Sample Type Indoor/Outdoor Rationale for Selection o' cn Asbestos breathing ht., ro VO known use in building construction, evidence of ■D O oo ro time-weighted presence in early air sampling and in settled dust, 3. 03 oo air known inhalation carcinogen I o o i Total Suspended breathing ht., o Characterize amount of airborne dust that is o c particulates Continuous, real­ inhalable (i 100 pm aerodynamic diameter) 3 CD time, air 3

PM10andPM2.5 breathing ht.. O Characterize the amount of airborne dust that is Continuous, real­ respirable time, air

Inhalable (<100pm)’ breathing ht., I/O To determine relative amounts of each fraction present thoracic (<10pm)’ time-weighted, and to have each fraction analyzed for silica, gypsum, respirable (<4pm)’ air asbestos, mica, fiberglass, and calcite to qualitatively determine potential hazards.

Respirable breathing ht., I/O Known component of concrete, evidence of crystalline silica time-weighted, presence in some settled dust samples, known air inhalation carcinogen.

pH" dust I/O Concrete has a high pH, if dust has a high pH, it may be contributing to reported symptoms of ENT irritation

Asbestos” dust I/O Determine if asbestos is present in dust

Delete? gypsum, mica, dust I/O Associated with building materials (concrete, fiberglass, calcite" drywall) and known to be irritating to ENT

magnesium dust I/O May act as a tracer for WTC-related dust, levels found in metals analysis of settled dust from 16,000-29,000 ppm * 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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