NYC 9/11 Public Portal Document
09,`28/2e61 10:14 6315883195 EMVIROSCIEtsICECNSLTAN PAGE 05
American Stook EXoltange,28 September 2001
Main Trading Floor upper level 580 < 5.0 <0% <0% <0%
SecE
15th floor 1506 480 90 <99% <1% <0%
12th floor central 460 84 <99% <1% <0° o
10th floor central 540 < 5.0 <1% <0% <0%
7a.floor 718 480 64 <99% <1% <0%
Harry's Trading floor Post 600 < 5.0 <1% <0'/% <0%
25/C21
22 Thames Street & 65 Broadway Respfrale Dust in Air Results
Location Air Volume Results 1-5um. 6-10pm > i Ohara
Liters ;.giro'
Red room post 21 MF8. 22 500 < 5.0 <1% <0% <0%
Thames
10" floor Center, 22 Thames 660 225 96% 4% <0%
91' Floor Center, 22 Thames 716 190 95% 5% <0%
T`' Floor Center, 22 Thames 836 194 95% .5% <0%
1711, F1oor Center, 65 Broadway 600 384 91% 8% <1%
16I Floor Center, 65 Broadway * 580 337 90% 9% <1%
The respirable dust mass results indicate that some indoor environments are very dusty. The
particle size distribution indicates that where the particulates are found they are very small and the
occupants will have dry scratchy throats and coughing. The trading ar ts and other areas have below
detectable limits of resprable dust. The dust was created by the catastrophe and came in openings in the
building created by the catastrophe and open doors and open windows.
The cleaning process on the floors and the .leaning of the HVAC system currently progress will
significantly reduce the dust levels on the floor.
Polychlorinatedbiphenyis (PCBs) are produced through combustion of fuels and plastics and are
found in electrical insulation material and tlectricat ballasts in lights. The PCB in air samples were
collected from areas considered representative of the building. Two samples were collected from the
trading floors and one sample was collected from the 9 ' and i.0"' floor of22 Thames Street to
characterize the building and accelerate the building screening process. The PCB in air results are
presented in the table below.
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NYC-WTC 000095088
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