NYC-WTC_000217800

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: N’YC BOE \ olumc (liters): 1920 Lab Group #: 6556 Filter Type / Filter Area: MCE ?S5 mnr Lab Sample 12 Grid Opening Size: 0.01124

Client Sample #: 12 Area Examined: 0.04496 mm-

GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 2A'O2

Analysis Performed By: MARK PEYSAKHOV

GO. Structure Structure Type Length ID of Structure N or v EDS ! No Amphibole Nonasb « u- «in Ambig/ND (Nonadb, :i F B C M >=05 M >=5p Chrys No Coord <5p j Elements)

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- 1

Struct = > 0,5p > 5:1 Aspect Ratio Grid acceptance: Positive diffraction pattern properties conlorming to <50% undissolved filter, overlapped or folded Totals laboratory identification criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or overiapped grid squares <5% F B C I M j >5E V= EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile [ AMPHIBOLES i Amphibole F = Single Fiber Amosite B = Buncle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix Actinolite Non-fdentified NSD = No Structures Detected

CITY_21MC100_002877876

NYC-WTC_000217800