NYC-WTC_000223759

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Voltinie (liters): 1920 Lab Group #: 7536 Filter Type / Filter Area: xMCE 385 mm- Lab Sample #: 4 Grid Opening Size: 0.01124

Client Sample 04 Area Examined: 0.04496 mm*

GRID BOX: Mauiiitlcation: 20,000 GRID IP: ■Accelcratiiio V'oltaqe: 100 KeV it Grid Openings: 4 Analysis Date: 4/25/02

A Analysis Performed By: MARX PEYSAKHOV

GO. Structure Structure Type Length ID of Structure N or v EDS No iNonadb F B C M >=05 p Chrys Amphibole ' Nanase Am6ig/ND No Coord <5u Elementsj

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Struct > 0.5u >5:1 Aspect Ratto Gna acceptance: >1= 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 oveitapped grid squares <5% T 1 F I B C ! M i >5u 7 = EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed I Chrysotile ; j i amphiboles ! Anipitibole i F = Single Fiber Amosite B = Bundle (<3 libers <1 fiber diameter apart Crocidolite Amhiuiious

C = Cluster (>3 Intersections) Antboptiyllite Mon-Anoestos 1 Tremolite S'on-Ideiiiilled't M = Matrix Actinolite NSD = No Structures Detected

CITY_21MC100_002919877

NYC-WTC_000223759