NYC-WTC_000214596

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1936 Lab Group #: 7980 Filter Type / Filter Area: MCE 385 mm^ Lab Sample #: 4 Grid Opening Size: 0.01124

Client Sample #: 04 Area Examined: 0.04496 mm^

GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: too KeV # Grid Openings: 4 Analysis Date: 6/6/02

Analysis Performed By: ROMAN PEYSAKHOV

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

-7 ■ ____ a

Struct = > 0.5(1 .> 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 >5m >/= EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile j AMPHIBOLY Amphibole F = Single Fiber ; Amosite 3 = 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

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