TEM Asbestos air sample results, NYC BOE, Apr 25 2002

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOI; Via Une (liters): 1816 Lab Group #: 7539 Filter Type i-iiter Area: MCE 385 mm"

Lab Sample #: 10 Grid ( I). .I llg Size: 0.01124

Client Sample #: 13 J A ami lied: 0.04496 mm^

GRID BOX: A' .unii'icatioii: 20,000 GRID ID: Accelei tjtmg Volrage: 100 KeV # Grid Openings: 4 A :F\ is Date: 4/25/02

Analysis Pet t rmed By: MARK PEA SAKHOV

GO. Structure Struc''., 'e Type Length ruTure NorS EDS No >=05p (Nonadb F ! E C M Chrys Ampnoc Morass Ambig/ND No Coord <5p Elements)

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n Struct = >0.5p >5:l Aspect Ratu Grid acceptance; sC Positive diffraction pattern properties con [g <50% undissolved filter, ovei .apped or tolded T )tals laboratory identification criteria observed <10% particulate coverage ; 50% coverage ate least 20 unfolded oroverlapned grid squares <5% F B C M >5|j n/= EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed ■ lie ■AMPHIBOLES ■ hole F = Single Fiber Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite u us C = Cluster (>3 Intersections) Anthophyllite Tremolite M = Matrix \.r.- Actinolite NSO = No Structures Detected

CITY_21MC100_003102068

NYC-WTC_000183073