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

ASBESTOS FIBER ANALYSIS BY TRANSMISSION ELECTRON MICROSCOPY (TEM)

I' 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.; 5741 - 62036 Floorslj-12j3J il5j JJ. Date Received; 10/23/01 Grid Openings Analyzed:__ 4 / Project Sample No.: 79-2 Average Grid Opening: 106.00 uin

I Air Volume; 1800 liters Total Area Analyzed: 0.0450 mm2

1J Filter Type: MCE 25 mm diam., Pore Size: 0.45 uro Analytical Sensitivity:22..i2 s/n«n2 Effective Area.- 385 nim2 0.0048 s/cc

ir FIBROUS PARTICULATES ANALYZED Number Observed CONCENTRATION Total Single Matrix Total. struct. Fi1 ter Air Fibers Bundles Clusters Struct. Struct >=5um Struct/ Struct/oc ngm/m3

Chrysotile Asbestos 0 0 0 0 0 0 0.0 0.0000 0

a 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 j 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; ■i.l

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

NYC-WTC_000174906