Asbestos fiber analysis results, H.S. of Economics & Finance, Apr

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1920 Lab Group #: 7351 Filter Type / Filter Area: MCE 385 mm= Lab Sample #: 8 Grid Opening Size: 0.01124 Client Sample #: 10 Area Examined: 0.04496 mm- GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 AnalysisDate: 4/7/02

Analysis Performed By: __ MICHAEL GORYCKI

GO. Structure Structure Type Length ID of Structure N or 7 EDS (Nonadb No F B C M >=05 u ) =5p Chrys Amphibole Nonasb Ambig/ND . No Coord <51U Elements)

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Struct = > (J.5p >5:1 .Aspect Ratio Griti acceptance-

7= Positive diffraction pattern properties conforming to <50% uncissolved filter, overlapped or folded Totals <10% particulate coverage >50% coverage ate laboratory Identification criteria observed least 20 unfolded ot overlapped gnd squares <5% F j B C I M j >5j 7= EDS spectrum conforminc Io laboratory holes or opaque areas 'dentification criteria observed Chrysotile I i AMPHIBOLES Amphibole 1 F = Single Fiber Amosite S = Bundle (<3 fibers <f fiber diameter apart Crocidolite Ambiguous j C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos i Tremolite M = Matrix j Non-ldentified Actinolite NSD = No Structures Detected

CONFIDENTIAL, CITY_21MC100_0 03459957 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000179552