NYC-WTC_000224742

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1936 Lab Group #: 7836 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 10 Grid Opening Size: 0.01124 Client Sample #: 10 Area Examined: 0.04496 mm^

GRID BOX: Magnification: 20,000 GRIDID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 5/23/02 Analysis Performed By: ______ 4 f

ROMAN PEYSAKHOV

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

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Struct = > 0.5p >5:1 Aspect Ratio Gnd acceptance: Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals laboratO7 Identification criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% F B C M >5p ■/= 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 Crocirdolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos T remolile M = Matrix Actinolite Non-Identified NSD = No Structures Detected

CITY_21MC100_002893528

NYC-WTC_000224742