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Asbestos TEM analysis report, Sept 25, 2001

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Laboratory report documenting asbestos fiber analysis by transmission electron microscopy for a site in New York on September 25, 2001.

NYC-WTC_000174876
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NYC 9/11 Public Portal Document

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: 09/25/01

n ASBESTOS FIBER ANALYSIS BY TRANSMISSION ELECTRON MICROSCOPY (TEM) j 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.: 5554 - 59451 Ilootsl9j JJ jl0i9^8 Date Received: 09/24/01 Grid Openings Analyzed:__ 5

Project Sample No.: 09-24-10 Average Grid Opening: 106.00 urn

Air Volume: 1500 liters Total Area Analyzed: 0.0562 mTn2

Filter Type: MCE 25 mm diam., Pore Size: 0.45 urn Analytical Sensitivity:J/7;8 s2Trim2 Effective Area :je.5 jTim2 0.QQ46 s/cc

FIBROUS PARTICULATES ANAT,YZED Number Observed CONCENTRATION Total Single Matrix Total. Struct. Filter Air Fibers Bundles Clusters Struct. Struct. >=5um Struct/mmG Struct/cc ncrm/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

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 O' 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 Analysiswas 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. Director of Electron Microscopy

NYC-WTC_000174876

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