NYC-WTC_000217657

NYC 9/11 Public Portal Document

TEM Asbestos (ait) Count Sheet Client Name: NYC BOE Volume (liters): 1912 Lab Group #: 8241 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: 100 KeV # Grid Openings: 4 Analysis Date: 6/23/02

Analysis Performed By: MARK PEYSAKHOV

GO. Structure Structure Type Length ID of Structure N or a/ EDS No (Nonadb F B C M >=05 p I : Chrys Amphibole Nonasb Ambig/ND No Coord Elements)

Struct = > 0.5p -> 5:! Aspect Ratio Grid acceptance: ’ ’i 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 >5m a/s 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_002877512

NYC-WTC_000217657