TEM asbestos air sample results, NYC BOE, Dec 2001

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1936 Lab Group #: 6060 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 14 Grid Opening Size: 0.01124

Client Sample #: 14 Area Examined: 0.04496 mm*

GRID BOX. Magnification: 20,000 GRIDED: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 12/7/01

Analysis Performed By: kF ROMAN PEYSAKHOV

GO. Structure J Structure Type j Length iD of Structure Nor V EDS No Ncir 'Nonadb B C M i >=5p Chrys Amphibole Nonasb Ambig/ND No Coord <5p Elements)

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1 Struct = > 0.5u _> 5:1 Aspect Ratio Grid acceptance: y = 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 [ C i M >5u y'= EDS spectrum conforming to laboratory holes or opaque areas Identification criteria observed Chrysotile ' AMPHIBOLES Amphibole F = Single Fiber Amosite 3 = Bundie (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections! Anthophyllite Non-Asbestos M = Matrix Tremolite Actinolite Non-Identified NSD = No Structures Detected

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NYC-WTC_000184051