TEM Asbestos air sample results, NYC BOE, Nov 2001

NYC 9/11 Public Portal Document

TEM Asbestos fair) Count Sheet Client Name: NL'C BOE Volume (liters): 1952 Lab Group #: 5927 Filter Type / Filter Area: MCE 385 mm" Lab Sample #: 10 Grid Opening Size: 0 01124

Client Sample #: 10 Area Examined: 0.04496 mm-

GRID BOX: Magnification: 20,000 GRIDED: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 11/19/01

Analysis Performed By: MICHAEL GORYCKI

GO. Structure Structure Type Length ID of Structure N or 7 EDS (Nonadb No F B C M >=05 p >=5p Chrys Amphibole Nonasb Ambig/ND No Coord <5m Elements)

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Struct = > Q.5u 5:1 Aspect Ratio Grid acceptance: N= Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals laboratory identification criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped gnd squares <5% F I B ’ C M I >5u V= EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile pAMPHlBOLES J 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-ldentified j Actinolite NSD = No Structures Detected

CITY_21MC100_0 03106593

NYC-WTC_000185459