TEM asbestos air sample results, NYC BOE, Nov 2001

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: m'C BOE Volume (liters): 1944 Lab Group #: 5986 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: Grid Opening Size: 0.01124

Client Sample #: 7 Area Examined: 0.04496 mm*

GRID BOX: Magnification: 20,000 GRID ID: 7^ Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 11/29/01

Analysis Performed By: ROMAN PEYSAKHOV

GO. Structure Structure Type Length ID bf Structure N or y EDS i (Nonadb j No M >=05 pi Chrys Amphibole Nonasb Amfaig/ND No Coord "i ® <5tJ Elements) ]

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Struct = > 0.5u >5:1 Aspect Ratio Grid accepiance: -^= Positive diffraction pattern properties conforming to -=50% undissolved filter, overtep^d or folded Totals laboratory identification criteria observed In t z-yr-i I A r* m A <10% particulate coverage >50% coverage ate least 20 unfolded or overtapped grid squares <5% F B C ] M r.. EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile ‘ AMPHIBOLES I 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-Identified ) NSD = No Structures Detected 1 Actinolite j i

CITY_21MC100_003106810

NYC-WTC_000185547