Chain of custody form, Trinity Place samples, Oct 2001

NYC 9/11 Public Portal Document

09:2812001 10:14 6315803195 E NIIRo^CIENCECNS rAN PAGE 04

American Stock Exchange, 2a September 2001

86 Trinity Place Lead in Air Results Location Air Volume Liters Results g'm3 Post 2 See A Main Trading 1,200 < 5.0 Floor Post 8 See G Main Trading 1,200 < 5.0 Floor 15'' floor north side 1,200 397 12e' floor central 1,200 445 10°t floor central 1,200 <5,0 701 floor central 1,200 < 5.0 Harry's Trading floor 1,204 < 5.0

22 Thames Street Lead in Air Results Location Air Volume Liters Results F4g/m3 Red room post 21 MF8 1,200 < 5.0 10* floor north side 2,450 <5.0 9" floor central 1,580 9.0 7s floor central 2,020 11.0

Except for the 15"' floor and the 120 floor these values arc all less than the OSHA lead PEL of SO ~ctr1m3. 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 in 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. T ,e 15's floor and 121 floor were re- sampled on September 290, 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. Respirable 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 the building screening process. The respirable dust in air results are presented ii the tables below.

86 Trinity Place Reseirable Dust In Air Results Location Air Volume Results 1-SIAM 6-10;m >10j:m Liters giml Post 2 Sec G Main Trading 600 <5.0 <10/n =0% <0% Floor

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