Asbestos fiber analysis report, Sept 2001

NYC 9/11 Public Portal Document

i".1

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

ATC Associates Inc. Approved N.V. State ELAP #10879 104 East 25th Street ACCREDITED NVLAP Lab Code # 1187 New York, ■ NY 10010 Report Date: 09/28/01 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; AHERA Final Rule, EPA Federal Register (40 CFR, Part 763), Vol. 52, No. 210, -October 30, 1987

; Sample Identification Analysis Parameters

Project/Site: lQ Rectpr Str^etj NY^^ TEM Sample No.; 5574 - 59646 Floors 15-17 Date Received: 09/28/01 Grid Openings Analyzed:__ 6

Project Sample No.;jr2^ Average Grid Opening: 106.00 um

Air Volume: • 1290 liters Total Area Analysed: 0.0674 mm2

Filter Type; MCE 25 mm diam., Pore Size: 0.45 urn Analytical Sensitivity.•l£.;8 s/nnn2 Effective Area; 385 mm2 0.0044 s/cc

FIBROUS PARTICULATESANALYZED Number Observed CONCENTRATION Total Single Matrix Total. Struct. Filter Air Fibers Bundles Clusters Struct. Struct >=5um StruGt/mm2 Scruot/cc nqm/m3

Chrysotile Asbestos 1 0 0 1 2 0 29.7 0.0089 292

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) 2 0 2 9.7 0-.0089 292 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 H/A

Totals (All Structures) 2 0 29.7 0.0089 N/A The estimated uncertainty of this analysis is 1 standard deviation.

Non-asbestos fiber i.d. (EDS/SAED) : None detected T Amphibole Asbestos Type: None detected LJ ________________ _______ __ __ _________ __________ The Analysis was carried out in accordance with the approved TEM method. This laboratory is in compliance with the quality specified for the method. id

Analyzed by: Report Reviewed by:

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

u

NYC-WTC_000174866