NYC-WTC_000200245

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 KVLAP 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 (2DS) Method: AHERA Final Rule, SPA Federal Register (40 CPR, Part 763), Vol. 52, No. 210, October 30, 1987

Sample Identification Analysis Parameters

.’rojecc./SitLa: H.S. for Economics & Finance, IQQ Trinity Pi., NYC TEM Sample No.: o606 60122 Entire Building Date Received: 10/04/01 Grid Cpenings Analyzed:__ 4

Project Sample No.: HSEF-S-lQ/t-44 Average Grid Opening ;106^00 um

Air Volume :1820 Uxers Total Area Analyzed: 0.0450 nim2

Filter Tvoe: MCE 25 mm diam. Pors Size: 0.45 um Analytical Sensitivity•.22 r 3/mm2 affective Area: 385 mml 0 ■ 0047 3/cc

FIBROUS PARTICULATES ANALYZED Number Obser^/ed CONCENTRATION Total Single Matrix Total. Struct. Filter Air Fibers Bundles Clusters Struct. Struct > = 5ut. Struct/Tnm2 Struct/' cc nam/m3

Glirysotile Asbestos 0 0 0 0 0 0 0.0 0,0000 0

Amphibole Asbestos 0 0 0 0 0 0 0.0 0.0000 0

Ambiguous 0 0 0 0 0 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 tr/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_OO3267888 N YC-WTC_000200245