Asbestos TEM analysis report, Sept 25, 2001

NYC 9/11 Public Portal Document

L__J 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: 09/25/01 ASBESTOS FIBER 7\MALYSIS 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 J Project/Site: 40 Rector Street, •40 Rector St., NY, NY TEM Sample No.; 5554 - 59459 Floors 19, 18, 10 9. 3 Date Received:_09/24/^ Grid Openings Analyzed:__ 6 T.,.J

Project Sample No.: 09-24-18 Average Grid Opening: 106.00 um

Air Volume: 1290 Titers Total Area Analyzed: 0.0674 mm2

Filter Type: MCE 25 mm diam., Pore Size: 0.45 um Analytical Sensitivity; 14.8 s/mm2 Effective Area: 385mm2 0.0044 s/cc

FIBROUS PARTICULATES ANATYZED Number Observed CONCENTRATION Total !.... 1 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 C

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.COCO 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_000174878