NYC 9/11 Public Portal Document
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PAGE 04
American Stock Exchange, 28 September 2001
86 Trinih Place Lead in Air Results
Location Air Volume Liters Results µghn3
Post 2 Sec A Main Trading 1,200 < 5.0
Floor
Post 8 Sec G Main Trading 1,200 < 5.0
Floor
15'' floor north side 1,200 397
12"' floor central 1,200 445
10"` floor central 1,200 < 5.0
7°' floor central 1,200 < 5.0
Harry's Trading floor 1,200 < 5.0
22 Thames Street Lead in Air Results
Location Air Volume Liters Results ,ecglm3
Red room post 21 MFS 1,200 < 5,0
l0"' floor north side 2,450 <5.0
9°' floor central 1,580 9.0
7°' floor central 2,020 11.0
Except for the 15°' floor and the 12' floor these values are all less than the OSHA lead PEL of50
4g/m'. Before and during the time of air sampling the fire escape doors to these floors were left open all
day and all night to cool the floor. It is believed that the lead its these samples blew in through the open
fire escape doors and deposited on the filter media of the samples. We believe that the lead levels in
these spaces were temporary and that they settled to the floor. The 1S" floor and 120f floor were re-
sampled on September 29s', 2001, to more fully characterize the lead in air values.
The respirable dust (breathable) in air samples were collected from areas considered
representative of the building. R.espirable dust samples were collected to show particle dust mass and the
distribution of particle size. Only one sample was collected from each area to speed up th e building
screening process. The respirable dust in air results are presented i:7 the tables below.
86 Trinity Place Resvirable Dust in Air Results
Location Air Volume Results 1-5m 6-10/4m >10;.sm
Liters
Post 2 Sec C Main Trading 600 <5.0 `1% <0% <0%
Floor
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NYC-WTC 000105114
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