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Document / 231 pages

Ambient air sampling report Book Two for 105 Duane Street,

Machine-extracted title · confidence 98%

Second volume of ambient air sampling and visual observation results for 105 Duane Street after the WTC collapse.

NYC-WTC_000104321–000104551

Folder label: “105 DUANE ST 1001650, 151/1

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NYC 9/11 Public Portal Document

I ATC ENVIRONMENTAL, INC. APPROVED NY STATE DOH ELAP 104 East 25th Street I New York, NY 10010 ACCREDITED OP/LAP Lab _ode e lla -

Summary of TEM Results I ATC Associates Inc. DATE, 10'26 01 104 East 25th Street

I New York, NY 10010

Mr. Fred Burkhardt

------------------------------------------------------------------------------ Project/Site Identification: Tribeca Towers, 105 Duane St., NY, NY Hallways CONCLUSION:

STATISTICAL SUMMARY

1) Inside Samples Asbestos Concentration TEM# Project # Volume(1) S/mm"2 S/cc nam/m"3 5770- 62555 H-1 1300 0.0 0.0044 * 5770- 62556 H-2 1300 0.0 0.0044 * 5770- 62557 H-3 1300 0.0 0.0044 * 5770- 62558 H-4 1300 0.0 0.0044 * 5770- 62559 H-5 1300 0.0 0.0044 5770- 62560 H-6 1300 0.0 0.0044 * 5770- 62561 14-7 1300 0.0 0.0044 5770- 62562 H-8 1300 0.0 0.0044 * 577C- 62563 H-9 1300 0.0 0.0044 577C- 62564 H-10 1300 0.0 0.0044 * 5770- 62565 H-11 1300 0.0 0.0044 Average= 0.0 0.0044 0 2) Outside Samples Asbestos Concentration

I TEM# Project # Volume(1) Average= S/mm*2 N/A S!cc N A norm/m"3 N/A 3) Blanks Asbestos Concentration TEM# Pro-sect # S/mm"2 S/cc n0m/m"3 Average= N/A SN A 4) Value of T - Statistic : N/A

* None detected; concentration equivalent to analytical sensitivity assigned.

----------------------------------------------------------------------------------------------------------------------------- This test report relates only to the specific items cited in the analysis.

I The analysis was carried out according to the approved TEM method. specified for the method. The laboratory is in compliance with the quality

This report must not be used by the client to claim product endorsement by NVLAP or any agency of the U.S. Government.

I Analyzed by: Marek Peysakhov Michael A. Gorycki, Ph.D. Director of Electron Microscopy

I I NYC-WTC 000104323

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NYC-WTC_000104323Source: NYC Law Department, mirrored locally

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