NYC-WTC_000200207

NYC 9/11 Public Portal Document

ATC Environmental, Inc. 104 East 25th Street New York, Nev; York 10 010

N.Y.C. Board of Education Approved N.Y. State ELAP #10879 23-11 Queens Plaza North ACCREDITED NVLAP Lab Code # 1187 Long island City, NY 11101 Report Date: lO/lO/Ol

ASBESTOS FIBER ANALYSIS BY TRANSMISSION ELECTRON MICROSCOPY (TEM; Wich fi.3er Ide-tification by Selected-Area Electron Diffraction ;eaED) and Energy-Dispersive X-R.AY Spectroscopy (SDSi Method: AHEEA Final Fule, EPA Federal Register ;40 CFR, Part 763), Vol. S2, No. 210. October 30, 1987

Sample,Identification Analysis Parameters

Project/Sics: Murry Serctraum H.5., 411 Pearl NY „ NY TEM Sample No.:_56^ 60709 ;sment & Floors Date Received: 10/09/Qi Grid Cpenings Analysed;__4

Project Sample No.: .MBKS-3>5-10/9-17 Average Grid Opening;ioe;j^uin

Air Volume :lSCSlh;Lers Total Arsa Analyzed: 0.0450 nm2

Filter Type•. MCE 25 nm diam., Pore Size: 0.45 urn Analytical Sensitivity Effective Area; 385 mm2 0.0047 s/cc

FIBROUS PARTICULATES ANALYZED Number Obser^/ed CONCENTRATION Toual Single Matrix Total; Scruct, Filter Air Fibers Bundles Clusters Struct, struct >»5uni struct .''mm2 Struct/c: ncin/m3

ChrysoPile Asbestos 0 0 0 0 0 0 0.0 0.0000 0

Amphibole Asbestos 0 0 0 0 0 c 0.c 0 . OGOO 0

Ambiguous 0 0 0 0 0 0 0.c 0.ocoo 0

Total asbestos ; includes ambiguous structures) 0 0 0.0 0 , 0000 0 Non-Asbestes 0 0 0 0 0 0 0-0 Q . 000Q N/A No Idencificati. 0 0 0 0 0 0.0 u.uuuu iN/A

Totals (All Structures) 0 c 0 .0 D.OOOO b’/A

The estimated uncertainty or 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 soecified for the method.

Analyzed by: Report Reviewed by:

Marek Peysakhov Michael A. Gorveki Ph.D. f Electron Microscopy

CITY_21MC1OO_OO3266954

NYC-WTC_000200207