Lead in air test results, 86 Trinity Place, Sept 2001

NYC 9/11 Public Portal Document

69128/2061 10:14 6315503155 E: VIROSCIENCECNSLTAN PAGE 05

American Stock Exchange, 28 September 2001

Main Trading Floor upper level 580 < 5.0 <0% <0% <0% SecE 15s' Boor 1506 480 90 <la/o <0% 120' floor central 460 84 <99% <1% <0% 100i floor central 540 < 5.0 <1% <0% - <0% 70i 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 Respirable Dust in Air Results Location Air Volume Results 1-S~m 6-10 tai >l0r,czn Liters Red room post 21 MF8, 22 500 <5.0 <1% <0% <0% Thames 10' floor Center, 22 Thames 660 225 96% 4% <0%

9n Floor Center, 22 Thames 716 190 95% 5% <0%

T°' Floor Center, 22 Thames 836 194 95% .5% <0% l7' Floor Center, 65 Broadway 600 384 91% 8% <1%

16" 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 areas and other areas have below detectable limits of resprable dust. Tice dust was created by the catasstrophe 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 cleaning of the HVAC system currently progress will significantly reduce the dust levels on the floor.

Polychlorinatedhiphenyls (PCBs) are produced through combustion of fuels and plastics and are found in electrical, insulation material and t lectrical 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 4"' and 10"' floor of 22 Thames Street to characterize the building and accelerate the building scr eeaing process. The PCB in air results are presented in the table below. Page 4 of 9

NYC-WTC 000094472