Asbestos TEM analysis results, 40 W St, Oct 2001

NYC 9/11 Public Portal Document

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ATC Environmental, Inc. 104 East 25th Street New York, New York 10010 ATC Associates Inc. Approved N.Y. State ELAP #10879 104 East 25th Street ACCREDITED NVLAP Lab Code # 1187 New York, NY 10010 Report Date: 10/23/01 .-J

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, EPA Federal Register (40 CFR, Part 763), Vol. 52, No. 210, October 30, 1987

Sample Identification Analysis Parameters

Project/Site: 40 Rector Street, 40 Rector St., NY, NY TEM Sample No.; S741 - 61982 Floorsl-JJ zl4^15jl9 Date Received: 10/23701 Grid Openings Analyzed;__ 4

Project Sample No.: 23-12 Average Grid Opening: 106.00 um

Air Volume: 1800 liters Total Area Analyzed; 0.0450 mm2

Filter Type: MCE 25 mm diara. Pore Size; 0.45 um Analytical Sensitivity; 22.2 s/min2 Effective Area: 385 mm2 0.0048 s/cc

st FIBROUS PARTICULATES ANALYZED i.amber Observed CONCENTRATION Total Single Matrix Total. Struct. Filter Air Fibers Bundles Clusters struct. Struct >=5um Struct/mtn2 Struct/cc nqm/m3

Chrysotile 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

Aiubiguous 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 (All 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:

Roman Peysakhov Michael A. Gorycki, Ph.D. \ 7 Director of Electron Microscopy A i

NYC-WTC_000174901