NYC-WTC_000212806

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1920 Lab Group #: 7999 Filter Type / Filter Area: MCE 385 mm^ Lab Sample #: 1 Grid Opening Size: 0.01124 Client Sample #: 01 Area Examined: 0.04496 mm^ GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: too KeV # Grid Openings: 4 Analysis Date: 6/8/02

Analysis Performed By: MARK PEYSAKHOV

GO. Structure Structure Type Length ID of Structure N or >/ EDS 1 (Nonadb I No F B C M >=05 p >=5m Chrys Amphibole Nonasb Ambig/ND No Coord <5p Elerrents)

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Struct = > 0.5n _> 5:1 Aspect Ratio Grid acceptance: = Positwe diffraction pattern properties conforming to *5°^ undissotved filter, overtap^ or folded Totals I-,.™.-.™ ___ laboratopi identification observedj _________ criteria <10% particulate covetage >50% coverage ate least 20 unfolded or overlapped grid squares <5% F B C M >5p ^= EDS spectrum conforming to laboratory holes or opaque areas ide.itification criteria observed Chrysotile , AMPHIBOLES Amphibole F = Single Fiber Amosite B = Bundie (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos M = Matrix Tremolite Actinolite Non-ldentified NS3 = Nci Structures Detected

CITY_21MC100_002852355

NYC-WTC_000212806