NYC-WTC_000220769

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1840 Lab Group #: 7354 Filter Type / Filter Area: MCE 385 mnV Lab Sample #: 7 Grid Opening Size: 0.01124 Client Sample #: 07 Area Examined: 0 04496 mm‘

GRID BOX: Magnification: 20,000 GRID ID: «=» Accelerating Voltage: iOO KeV # Grid Openings: 4 Analysis Date: 4/8/02

/analysis Performed By: MARK PEYSAKHOV

GO. i Structure Structure Type Length ID of Structure N or N EDS ; No (Nonadb F B C M >=5p Chrys Amphibole Nonasb Arnbig/ND No Coord I <5p Elemerts)

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Struct = > 0 5jj >5:1 Aspect Ratio Gnd acceptance: v = Positive diffraction pattern properties conforming to <50% undissolved filter, overtapped or folded Tot^s laboratory identification oteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped gnd squares <5% F B I C Ml >5u vY EDS spectrum conforming to laboratory holes or opaque areas Identification criteria observed Chrysotile AMPHIBOLES Amphibole F = Single Fiber Amosite —r B = Bundle (<3 libers <1 lioer diameter apart Crocidolite Ambiguous __ L C = Cluster (>3 intersections' Anthophyllite Non-Asbestos Tremolite M = Matrix Non-Identified Actinolite NSD = No Structures Detected

CITY_21MC100_000621701 NYC-WTC_000220769