TEM Asbestos air sample results, NYC BOE, Feb 2002

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1840 Lab Group #: 6853 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 3 Grid Opening Size: 0.01124 Client Sample #: 03 . Area Examined: 0.04496 mm- GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 2/28/02

Analysis Performed By: ROMAN PEYSAKHOV

GO. Structure Structure Type Length ID of Structure N or 4 EDS i No ■>=0571 :>=5|J (Nonadb I F B C M Ch^s Amphibole Nonasb Ambig/ND Elements) ! No Coord <5u '

I 4 / 5 J— 7

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Struct = > 0.5|x >5:1 Aspect Ratio Grid acceptance: Positive diffraction pattern properties'conforming to *50% undissolved filter, overlap^ or folded Totals ,.1,_ ____________ laboratory observedj -I_______ identification criteria <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% F B C M >5p '/= EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile amphiboles' Amphibole F = Single Fiber Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix Non-Identified Actinolite NSD = No Structures Detected

CITY_21MC1OO_OO31O8332

NYC-WTC_000185700