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

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) !_ i . 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

Samde Identification Analysis Parameters

, Project/Site: 40 Rector Street, 40 Rector St., NY, NY TEM Sample No.: 5741 - 61976 Floors 1t12, 14, 15, 19 ' Date Received: 10/23m Grid Openings Analyzed:__ 4

Project Sample No.: 17-14 Average Grid Opening: 106.00 um

Air Volume: 1820 liters Total Area Analyzed: 0.0450 mni2

Filter Type: MCE 25 mm diam.. Pore Size; 0.45 um Analytical Sensitivity; 22.2 s/mm2 Effective Area: 38S mni2 0.0Q47 s/cc

J FIBROUS PARTICULATES ANALYZED Number Observed CONCENTRATION Total Single Matrix Total. Struct. Filter 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

-.j 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:

l'""} Roman Peysakhov Michael A. Gorycki, Ph.D. <3 Director of Electron Microscopy

NYC-WTC_000174900