TEM Asbestos air sample results, NYC BOE, Feb 2002

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Clienr Name: NYC BOE A plume (liters): 1816 Lab Group #: 6780 Filter Type / Filter Area: MCE 3S5moi- Lab Sample #: 12 Grid Opening Size: 0.Q1124 Clienr Sample #: 15 Area Exam in e d: 0.04496 mm- GRID BOX: Magnification: 20.000 GRID ID: > ■Accelerating Voltage: 100 KeV # Grid Openings: 4 .Analysis Date: 2/22/02

■Analysis Performed By: MARK PEYSAKHOV

GO, Structure Structure Type Length ID of Structure N or T EDS ! (Nonadb i No F S c mTu >=5p Chrys Amphibole Nonasb Ambig/ND No Coord <5p Elements) •

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Struct = > 0.5p >i:l .Aspect Ratio Grid acceptance: Positive diffraction pattern properties conforming to <50% undissolved titter, overlapped or folded Totals laboratory identification criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid sauares <5% T i F i B I C I M : >5u 'J- EDS spectrum conforming to acorator/ holes or opaque areas ioeniification criteria observed Chrysotile i "amphiboles Amphibole F = Single Fiber Amosite S = 3‘jndle (<3 fibers <1 fiber diamsier apart Crocidolite Ambiguous ! C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos i Tremoiite M = Matrix I Non-Identifisd i Actinolite NSC = No Structures Detected

CITY_21MC1OO_OO31O3392

NYC-WTC_000183849