Asbestos fiber analysis report, Sept 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 'l 104 East 25th Street ACCREDITED NVLAP Lab Code # 1187 u New York, NY 10010 Report Date: 09/29/01

n 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, ERA Federal Register (40 CFR, Part 763), Vol. 52, No. -210, October 30, 1987

■ Sample Identification Analysis Parameters

Project/Site: £O^^ctPr StreetjJY£^ TEM Sample No.: 5579 - 59745 Foors 6, 7, 3, 4, 11, 2, l/Lobby Date Received: 09/29/01 Grid Openings Analyzed:__ 6

--1 Project Sample Wo.: T22 Average Grid Opening: 106.00 um

Air Volume: 1290 liters Total Area Analyzed: 0.0674 mm2

Filter Type: MCE 25 mm diam,. Pore Size; 0.45 um Analytical Sensitivity:14^8 s2Tnm2 Effective Area: 3e5mTn2 0.0044 s/cc

FIBROUS PARTICULATES ANALYZED Number Observed CONCENTRATION Total Single Matrix Total. ■ struct. Filter Air Fibers Bundles Clusters Struct. Struct >=5um Struct/Tnm2 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 c

Ambiguous 0 0 0 0 0 0 0.0 0.0000 0

Total asbestos (includes ambiguous structures) 0 0 0.0 0.0000 c Non-2ksbestos 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 Structux'es) 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. ■ 'R This laboratory is in compliance with the quality specified for the method.

Analyzed by: Report Reviewed by:

Marek Peysakhov Michael A. Gorycki, Ph.D. ' 1 Director of Electron Microscopy

NYC-WTC_000174850