NYC-WTC_000225103

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume filters): 1920 Lab Group #: 7046 Filter Type / Filter Area: MCE 385 mm" Lab Sample #: 17 Grid Opening Size: 0.01124.

Client Sample #: 17 Area Examined: 0.04496 mm"

GRID BOX: Magnification: 20,000. GRIDID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 3/12/02

Analysis Performed By: MARK PEYSAKHOV

GO. Structure Structure Type Length ID of Structure Norv EDS No (Nonadb F B C M >=03 pi :>=51J Chrys Amphibole Nonasb ’ Ambig/ND No Coord <5u Elements)

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Struct = > 0.5 p > 5:1 Aspect Ratio Grid acceptance: 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 overlapped grid squares <5% F B C M >5|j EDS spectrum conforming to laboratory holes or opaque areas identification criteria obsenzed 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 Struciures Detected

CITY_21MC100_002920999

NYC-WTC_000225103