Asbestos TEM analysis results, 40 W St, Oct 2001

NYC 9/11 Public Portal Document

ATC Environmental, Inc. 104 East 25th Street New York, New York 10010

!... I 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 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, 1937

Sample Identification Analysis Parameters

[...., Project/Site: 40 Rector Street,40 Rector St^^j^y,NY TEM Sample No.: 5741 - 62008 P1oo£S1z12,14j_JJj_19 Date Received: 10/23m Grid Openings Analyzed:__ 4

Project Sample No.: 49-7 Average Grid Opening: 106.00 urn

Air Volume: 1800 liters Total Area Analyzed: 0.0450 mm2

Filter Type: MCE 2S mm diam., Pore Size: 0.4S um Analytical Sensitivity: 22.2 a/mm2 Effective Area: 385 mm2 0.0048 s/cc

FIBROUS PARTICULATES ANALYZED Number Observed CONCENTRATION Total Single Matrix Total. struct. Filtc Air Fibers Bundles Clusters Struct. Struct >=5um Struct/mm2 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

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 _j Amphibole Asbestos Type: None detected ru 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

NYC-WTC_000174903