NYC-WTC_000220837

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NTC BOE Volume (liters): 1920 Lab Group #: 7413 Filter Type / Filter Area: MCE 385 mm^ Lab Sample #: 16 Grid Opening Size: 0.01124 Client Sample #: 16 Area Examined: 0.04496 mm^ GRID BOX: Magnification: 20,000 GRIDID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 4/14/02

Analysis Performed By: MARK PEYSAKHOV

GO. i Structure Structure Type Length ID of Structure N or v EDS (Nonadb No F B C M >=05 M >=5m Chrys Amphibole Nonasb Aiibig/ND No Coord <5m Elements)

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Struct = > 0.5|i > 5:1 Asftect Ratio Grid acceptance: v= Positive oiffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals laboratory identification crileriti observed <10% particulate coverage >50% coverage ate

V= EDS spectrum conforrning lo laboratory least 20 unfolded or overlapped grid squares <5% F B C M I holes or opaque areas ------ 1--------- Identification criteria observed Chrysotile AMPHIBOLES Amphibole F = Single '^iber Amosite E = Bundle (<3 fibers <1 fil>er diameter apart Crocidolite Ambiguous C = Cluster ::>3 Intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix Non-Identified Actinolite NSD = No Structures Detected

CITY_21MC100_000621842 NYC-WTC_000220837