Asbestos TEM analysis report, Sept 25, 2001

NYC 9/11 Public Portal Document

ATC Environmental, Inc. r'} 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: 09/25/01 , J 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: 40 Rector Street, 40 Rector Sb., NY, NY TEM Samble No.: 5554 59462 (" Floors 15, IS, 10, 9, 8 Date Received: 09/24/01 Grid Openings Analyzed:__ 6

Project Sample No.: C9-24-2I Average Grid Opening t • 1'06.00 um

Air Volume: 1330 liters Total Area Analyzed; 0.0674 mm2

' - Filter Type: MCE 25 mm diam., Pore Size: 0.45 um Analytica1 Sensitivity:■ 14.8 s/mm2 : Effective Area: 385mm2 ' 0.0043 s/cc

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

Analyzed by: Report Reviewed by:

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

NYC-WTC_000174879