Asbestos TEM analysis results, 40 W St, Oct 2001

NYC 9/11 Public Portal Document

ATC Environmental, Inc. 104 East 25th Street '....J 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: 10/23/01

ASBESTOS FIBER ANALYSIS BY TR7\NSMI5SION ELECTRON MICROSCOPY (TEM) With Fiber Identification by Selected-Area Electron Diffraction (SAED) and Energy-Dispersive X-RAY Spectroscopy (EDSI Method; MERA Final Rule, EPA Federal Register (40 CFR, Part 763), Vol. 52, No. 210, October 30, 1987

J Sample Identification Analysis Parameters

! 1 ProjecC/Site: 40 Rector Street, 40 Rector St., NY, NY TEM Sample No.: 5741 - 62009 Floorsrj2j_l±i_J^j_J^ Date Received: 10/23/01 Grid Openings Analyzed:__ 4

Project Sample No.: 50-7 Average Grid Opening: 106.00 um L_J Air Volume: 1800 liters Total Area Analyzed: 0.0450 nim2

Filter Type: MCE 25 mm diam., Pore Size; 0.45 utn Analytical Sensitivity:22;2 s2n!!n2 Effective Area: 385 mm2 0.0048 s/cc

FIBROUS PARTICULATES ANALYZED Mumber Observed CONCENTRATION Total lJ single Matrix Total. Struct. Filter Air Fibers Bundles Clusters Struct. Struct. >=5um Struct/min2 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 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

NYC-WTC_000174904