TEM Asbestos air sample results, NYC BOE, Feb 2002

NYC 9/11 Public Portal Document

TEM Asbestos fair) Count Sheet Client Name: NYX BOE Volume niters): 1S32 Lab Group 6765 Filter Tvpe / Filter Area: MCE 385 mm- Lab Sample #: 17 Grid Opening Size: 0.01124 Client Sample #: 20 Area Examined: 0.04496 mm^ GRID BOX: Magnification: 20,000 GRID ID : Accelerating Voltage: 100 KeV U Grid Openings: 4 Analysis Date: 2/21/02

Analysis Performed By: RONLAN PEYSAKHOV

GO. Structure Structure Type Length ID of Structure N or V EDS No (Nonadb F B C M >=05 |j Ctirys Amphibole Nonasb Ambig/ND _ No Coord <5m Elements)

If a

Struct = > 0.5g 5:1 Aspect Ratio Grid acceptance: >/= Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals laboratory identification criteria observed <10% partioulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% F B i C I M I >5u EDS spectrum coniorminc to laboratory holes or opaque areas identification criteria observed Chryrsotile : amphiboles Amphibole i F = Single Fiber Amosite 5 = oundle |<3 fibers <1 fiber diameter apart Crocirdolite Ambiguous j C = Cluster ;>3 Intersections) Anthophyllite Non-Asbestos j T remoiite M = Matrix Noil-Identified i Actinolite NSD = No Structures Detected

CITY_21MC1OO_OO31O3373

NYC-WTC_000183842