NYC-WTC_000224042

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1920 Lab Group #: 7331 Filter Type / Filter Area: MCE 385 mm^ Lab Sample 8 Grid Opening Size: 0.01124 Client Sample #: 08 Area Examined: 0.04496 mm^

GRID BOX^ Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 4/5/02

Analysis Performed By: MARK PEYSAKHOV

GO. Structure Structure Type Length ID of Structure Nory EDS No.. _ Chrys_ -AmBhitolel Nonasb__ LAiibigi'NL _ (Nonadb No Coord <5|J 'ElemefiB)

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Struct = > 0.5pi > 5:1 Aspect Ratio Grid acceptance: ^/= Positive diffraction pattern properties conforming to <50% undissolved filter, ovedapped or folded Totals laboratory identification criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or overtapped grid squares <5% F B C M >5m EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile AMPHIBOLES . 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 Actinolite NSD = No Structures Detected

CITY_21MC100_002892585

NYC-WTC_000224042