Asbestos fiber analysis report, Sept 2001

NYC 9/11 Public Portal Document

ATC Environmental, Inc. /‘■'I 104 East 25th Street New York, New York 10010 u ATC Associates Inc. Approved N.Y. State ELAP #10879 n 104 East 25th Street ACCREDITED NVLAP Lab Code # 1187 New York, NY 10010 Report Date: 0.9/29/01 P, 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. 21G, October 30, 1987

■ Sample Identification Analysis Parameters u . ■

Project/Site: 40 Rector Street, NY, NY TEM Sample No.: 5579 - 59756 Foors 6, 7, 3, 4, 11, 2, l/Lobbv Date Received: 09/29/01 Grid Openings Analyzed; 6

f-Project Sample No . : T33 Average Grid Opening: 106.00 urn

Air Volume :^ 1260 jAte^ Total Area Analyzed; 0.0674 mm2

Filter Type: MCE 25 mm diam. Pore Size: 0.45 um Analytical Sensitivity: 14.8 s/inm2 Effective Area: 335 mm2 0.0045 s/cc

FIBROUS PARTICULATES ANALYZED Number Observed CONCENTRATION Total '■1

Single Matrix Total. Struct. Filter Air Fibers Bundles Clusters Struct. Struct. >=5um Struct/mm2 Struct/cc ngm/raS

Chrysotile Asbestos 0 0 1 0 1 1 14.8 0.0045 15-0

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) 1 1 14.8 0.0045 150 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) 1 1 14.8 0.0045 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. n This laboratory is in compliance with the quality specified for the method.

Analyzed by: Report Reviewed by:

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

NYC-WTC_000174851