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NYC-WTC_000209766

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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: 10/11/01

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 7XHERA Final Rule, EPA Federal Register (40 CFR, Part 763), Vol 52, No 210, October 30, 1987

Sample Identification Analysis Parameters

Project/Site. 9 9 Church Street, 9 9 Church St , NY, NY TEM Sample No 5660 - 60867 Sth Floor Date Received 10/10/Ql Grid Openings Analyzed __ 4

Progect Sample No.. 8-6 Average Grid Opening 106 00 urn

Air Volume; 1800 liters Total Area Analyzed- 0 0450 mm2

Filter Type: MCE 25 mm diam., Pore Size; 0 45 urn TXnalytical Sensitivity. 22.2 s/mrTi2 Effective Area; 385 mm2 0.0048 s/cc

FIBROUS PARTICULATES ANALYZED Number Observed CONCENTRATION Total Single Matrix Total Struct Filter Air Fibers Bundles Clusters Struct Struct >=5um Struct/mm2 Struct/cc ncnT»/ni3

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 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. Director of Electron Microscopy

CITY_21MC100_002842215

NYC-WTC_000209770

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NYC-WTC_000209770Source: NYC Law Department, mirrored locally

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