Asbestos fiber analysis report, Sept 2001

NYC 9/11 Public Portal Document

n vJ ATC Environmental, Inc. ; I 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: 09/28/01

ASBESTOS FIBER ANALYSIS BY TRANSMISSION ELECTRON MICROSCOPY (TEM) with Fiber Identification by Selected-Area Electron Diffraction (SA3D) 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-

n .■ ■' Sample Identification Analysis Parameters LuJ Proj ect/Site40 Rector Street, NY, NY TEM Sample No.: 5575 5 9654 Fj£orsl2&14 Date Received: Q9/28/01 Grid Openings Analyzed:__ 6

■ r--) Project Sample No.:^^ Average Grid Opening: 106.00 um

Air Volume: 1280 liters Total Area Analyzed; Q.0674 mm2

!"'T Filter Type: MCE 25 mm diam.,- Pore Site: 0.45 um Analytical Sensitivity: 14.8 s/mm2 i.J Effective Area: 385 mm2 0.0045 s/cc

('--1

FIBROUS PARTICULATES ANALYZED Number Observed CONCENTRATION Total Single Matrix Total. Struct. Filter Air Fibers Bundles Clusters Struct. Struct •=5um StruGt/mm2 Struct/cc ngm/m3

r.I 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 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 C. C 0.0000 N/A

Totals (All Structures) 0 0 0.c 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. R This laboratory is in compliance with the quality specified for the method.

n Analyzed by: Report Reviewed by;

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

NYC-WTC_000174860