Air sampling results memo, Dec 2-3 2001

NYC 9/11 Public Portal Document

SIAC Air Quality, December 2-3, 2001

All asbestos air samples were all less than detectable limits. See attached tables, TEM Air Sample Results.

The respirable dust (breathable) in air samples were collected from areas considered representative of the space. Respirable dust samples were collected and analyzed to show particle dust mass and the distribution of particle size. The particulate dust mass shows the quantity of particulate in the air. The particulate size distribution shows the size of the particulate in the dust collected. Particles less than 10 micrometers (10 ,um) can be inhaled by the lungs. Particles less than 5 micrometers (5 jim) can be inhaled deep into the alveoli of the lungs. The respirable dust mass and the distribution of particle size in air results are presented in the tables below.

SIAC 86 Trinity Place, Respirable Dust Mass and Particle Size Distribution in Air Results, 2-3 December 2001 Location Air Volume Results µg/m3 1-5µm 6-10µm >10µm Liters

SIAC Equipment Repair Workshop 1891 <0.1 <1% 0% 0%

Computer rack @ Fax 2856 <0.1 <1% 0% 0%

Console 11, desk area 561 <0.1 <1% 0% 0%

AC # 1 2601 <0.1 <1% 0% 0%

The respirable dust mass and size distribution results indicate that the air in the building has negligible dust levels. The particulate mass and size distribution values in the building indicate that the building occupants' signs and symptoms including dry scratchy throats, coughing, chest tightness, and eye irritation are due to the particulate in the air outside the building.

The lead in air samples were collected from areas considered representative of the space. The lead in air results are presented in the table below. SIAC 86 Trinity Place Lead in Air Results. 2-3 December 2001 Location Air Volume Liters Results µg/m3

SIAC Equipment Repair Workshop 4,768 < 1.0

Computer rack @ Fax 3,417 <1.0

Console 11, desk area 1,683 <1.0

The results are all less than detectable limits. The EPA National Ambient Air Quality Standard for lead is 1.5 jug/m3. These results met the U.S. EPA National Ambient Air Quality Standard for lead and are considered safe for reoccupancy.

Polynuclear aromatic hydrocarbons (PAHs) were collected because PAHs are produced through combustion of fuels, found in fuels, plastics, and other building components. PAHs samples were collected from areas considered representative of the space. The PAHs in air results are presented in the tables below.

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