NYC-WTC_000202655

NYC 9/11 Public Portal Document

ATC Environmental, Inc. 104 East 25th Street New York, New York 10010 N.Y.C. Board of Education Approved N.Y. State ELAP #10879 28-11 Queens Plaza North ACCREDITED NVLAP Lab Code # 1187 Long Island City, NY 11101 Report Date: 10/05/01 ASBESTOS FIBER ANALYSIS BY TRANSMISSION ELECTRON MICROSCOPY (TEM) with Fiber Identification by Selected-Area Electron Diffraction (SAED) and Energy-Dispersive X-RAY Spectroscopy (EDS) Method: AHERA Final Rule, SPA Federal Register (40 CFR, Part 763), Vol. 52, No. 210, October 30, 1987

Sample Identificaclon Analvais Parameters

Project/Site; H.S, for Ecohomics & Finance, 100 Trinity Pl., NYC TEM Sample No.: 5606 - 60110 Entire Building Date Received: 10/04/01 Grid Openings Analyzed:_ 4

Project Sample No.: HSEF-E-10/3-32 Average Grid Opening: 106.00 um

Air Volume: 1820 liters Total Area Analyzed: 0.0450 mmZ

Filter Type; MCE 25 mm diam., Pore Size; 0.45 um Analytical Sensitivity: 22.2 3/nnn2 Effective Area: 385 mm2 Q.Q047 s/cc

FIBROUS PARTICULATES ANALYZED- Number Observed CONCENTRATION Total Single Matrix Total. struct. Filter Air Fibers Bundles Clusters Struct. Struct >«5um Struct/nim2 Struct/cc ngm/m3

Cnrysotile Asbestos 0 0 0 0 0 0 0.0 0.0000 0

AinphiboLe Asbestos 0 0 0 0 0 0 0,0 0.0000 0

Ambiguous 0 0 0 0 Q 0 0.0 0.0000 0

Total asbestos (includes 'ambiguous structures) 0 0 0,0 0.0000 0 Non-Asbestos 0 0 0 0 0 0 0.0 0.0000 N/A No Identification 0 0 0 0 0 0 0.0 0.0000 N/A

Totals (Ail Structures) 0 0 0.0 0.0000 N/A The estimated uncertainty of this analysis is 1 standard deviation.

Non-asbestos fiber i.d. (EDS/SAED): None detected Amphibole Asbestos Type: None detected The Analysis was carried out in accordance with the approved TEM method. This laboratory is in compliance with the quality specified for the method.

Analyzed by: Report Reviewed by:

Marek Peysakhov Michael A. Gorycki, Ph.D. Director of Electron Microscopy

CITY_21MC1OO_OO3274915

NYC-WTC_000202655