NYC-WTC_000200248

NYC 9/11 Public Portal Document

ATC Environmental, me. 104 East 25th Street New York, New York 10010 N.Y.C. Soard of Education Approved N.Y. State ELA? #10379 28-11 Queens Plaza North ACCREDITED NVLAP Lab Code # 1187 Long Island City, NY llIOl 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 Pinal Rule, SPA Federal Register (40 CFR, Part 763), Vol. 52, NO. 210, October 30. 1987

Sample Idencification Analysis Parameters

Projecc/Sits: H.5. for Economics & Finance, 100 Trinity Pl., NYC TSM Sample No.: 5606 60126 Entire Suilding Date Received: I0/04/Q1 Grid Openings Analysed;__ 4

Project Sample No.; HSEF-5-10/3-48 Average Grid Opening: 106.00 um

Air Volume.'^ISlojJ^te^ Total Area Analysed: 0.0450 mm2

Filter Type: MCE 25, mm diam., Pore Size: 0,45 um Analytical Sensitivity; 22.2 3/mni2 Effective Area: 385 mm2 0■0047 s/cc

FIBROUS PARTICULATES ANALYZED gJumber Obser^/ed CONCENTRATION Total Single Matrix Total. Struct. Filter Air Fibers Bundles Clusters Struct. Strjct >aSiint Struct/mm2 StruGt/cc npm/m3

Chrysotile Asbestos 0 0 0 0 0 0 O.Q Q.QOOO 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 st:nictures) 0 0 0.0 0.0000 0

Non-Asbestos 0 0 0 0 0 0 0.0 0.0000 N/A Na Identification 0 0 0 0 0 0 0.0 0.0000 H/A

Totals (All Structures) 0 0 0.0 0.0000 N/A The .estimated uncertainty cf 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_OO3267892 NYC-WTC_000200248