Chain of custody form, Trinity Place samples, Oct 2001

NYC 9/11 Public Portal Document

09/28/2801 16:14 6315803135 ENVIR0S IENCECNSLTAN PAGE 85

American Stook Exchange,28 September 2004

Main Trading Floor upper level 580 <5.0 <0% <0% <0% SecE 151t door 1506 480 90 <99% <1e/a <0% 12th floor central 460 84 <99% <I% <00 o

101i floor central 540 <5.0 <1% <0% <0% 76 floor 718 480 64 <99% <1% <0% Harry's Trading floor Post 600 < 5.0 <1% <0% <0•% 25iC21

22 Thames Street & 65 Broadway Respirable Dust in Air Results Location Air Volume Results 1-Sum 6-10km >l0sm Liters ;zghn' Red room post 21 MF8, 22 500 < 5.0 <1% <0% <0% Thames 101i floor Center, 22 Thames 660 225 96% 4% <0% 9° Floor Center, 22 Thames 716 190 95% 5% <0% 7' Floor Center, 22 Thames 836 194 95% .5% <0% 17th Floor Center, 65 Broadway 600 384 91% 8% <1% 160i 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 respray ble 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 cleaning ofthe HVAC system currently progress %rill

significantly reduce the dust levels on the floor.

Folychlorinatedbipbenyls (PCBs) are produced through combustion of fuels and plastics and are found In electrical insulation material and electrical bsilasts ir. 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 10th floor of 22 Thames Street to characterize the building and accelerate the building screening process. The PCB in air results are presented in the table below. Page 4 of 9

NYC-WTC 000095123