TEM Asbestos air sample results, NYC BOE, Nov 2001

NYC 9/11 Public Portal Document

TEM Asbestos fair) Count Sheet Ciient Name: NY C BOE Volume (liters): 1944 Lab Group #: 5975 Filter Type / Filter .Area: MCE 385 mm* Lab Sample #: 9 Grid Opening Size: 0.01124 Client Sample #: ■Area Examined: 0.04496 mm*

GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 11/27/01

Analysis Performed By: PP ROMAN PEYSAKHOV

GO. Structure Structure Type Length ID of Structure M or •V EDS No (Nonadb S F B i C M >=05 p j Chrys Ampnibote Nonasb Ambig/ND No Coord <5(J Eiements) I

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Struct = > 0.5u > 5:1 Aspect Ratio Grid acceptance; 4= Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals laboratory identification critena observed <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% F B I C M >5u -'J= EDS soectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile /amphiboles Amphibole F = Single Fiber ; Amosite 3 = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C - Cluster (>3 Intersections) j Anthophyllite Non-Asbestos I T remolite M = Matrix Non-Identified j Actinolite NSO = No Structures Detected

CONFIDENTIAL, CITY_21MC100_003458445 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000179199