TEM Asbestos air sample results, NYC BOE, Jan 2002

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): . 1936 Lab Group #: 6408 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 21 Grid Opening Size: 0.01124 Client Sample #: 21 Area Examined: 0.04496 mm^ GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 1/23/02

Analysis Performed By: MARK PEYSAKHOV

GO, Structure Structure Type Length ID of Structure NorN EDS i No (Nonadb j F B C M >=05 M Ctirys Amphibole Nonasb Ambig/ND No Coord Elements) :

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Struct = > 0.5p >5:1 Aspect Ratio Grid acceptance:

V= Positive diffraction pattern properties conforming to <50% undissol^ed filter, overlapped or folded Totals laboratory identification criteria observed <10% parficLiiate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% F B C M >5p 'i- EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile AMPHIBOLES ‘ Amphibole F = Single Fiber Amosite B = Bundle (<2 fibers <1 fiber diameter apart Crocidolite ; Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos Tremolite : M = Matrix Non-Identified NSD = No Structures Detected Actinolite ; L..I

CONFIDENTIAL, CITY_21MC100_003467481 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000180758