NYC-WTC_000204236

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1824 Lab Group #: 7345 Filter Type / Filter Area: MCE 385 mm^ Lab Sample #: 1 Grid Opening Size: 0.01124

Client Sample #: 04 Area Examined: 0.04496 mm^

GRID BOX: Magnification: 20,000 GRIDID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 4/6/02

Analysis Performed By: MARK PEYSAKHOV

GO, Structure Structure Type Length ID of Structure N or N EDS (Nonadb No F B C M >=05 p i =5(.l Chrys Amphibole Nonasb AmbigyND No Coord <6p Elements)

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______ Struct 'i; 5u >5:1 Aspect Ratio Grid acceptance' V = Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals <10% particulate coverage >50% coverage ate laboratory identification criteria observed least 20 unfolded or overacped grid squares <5% ) F B C M >5p /= EDS spectrum conforming to iaboratory 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 Actinolite Non-ldentified NSD = No Structures Detected

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NYC-WTC_000204236