TEM Asbestos air sample results, NYC BOE, Feb 2002

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: M'C BOE Volume niters): 1809 Lab Group #: 6600 Filter Type ^Filter .Area: .MCE 385 mm- Lab Sample #: 13 Grid Opening Size: 0.01124 Client Sample #: 16 ■Area Examined: 0.04496 mm- GRID BOX: Magnification: 20,000 GRIDED: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 2/S/02

Analysis Performed By: MARK PEYSAKHOV

GO, Structure Structure Type Length ID of structure Nor < EDS No >=05 pi ; =51J (Nonadb F B C M Ctirys Amphibole Nonasb Ambig/ND No Coord <5|J Elements)

______________________ I i Struct = >0.5n >5:1 Aspect Ratio Grid acceptance: 4= Positive diffraction pattern properties conforming to <50% undissolvBC filter, overiapped or folded Totals laboratory identification critena observed <10% particulate coverage >5C% coverage ate least 20 unfolded or ovenapped grid sauares <5% F B j C i M j >5: '/= EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chrv'sotile “1 r I AMPHIBOLES Araphiboie j F = Single Fiber ( 1 I Amosite 3 = Bundle {<3 libers <1 fiber diameter apart Crociaolite .Ambiguous j C = Cluster (>3 Intersections) 1 Anthophyllite Non-Asbestos j Tremolite : I ■ I M = Matrix i Non-Identified I ! Actinolite NSD = No Structures Detected

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NYC-WTC_000183737