NYC-WTC_000201079

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1805 Lab Group #: 7850 Filter Type / Filter Area: MCE 385 mm^ 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: IGO KeV # Grid Openings: 4 AnalysisDate; 5/25/02

::5 Analysis Performed By: MARK PEYSAKHQV

GO, Structure Structure Type Length ID of Structure N or EDS , No ;■ (Nonadb ' F B C M >=O5-1J I ■=5pi Chrys Amphibole Nonasb Ambig/ND No Coord <5u Elements]'

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S i Struct = > 0.5p > 5:1 Aspect Ratio Grid acceptance: 'J- Positive diffraction pattern properties conforming to *'50°''” undissolved filter, overlapped or folded Totals ' laboratory identification criteria obser/ed <10% particulate coverage >50% coverageate- . - least 20 unfolded or overlapped grid squares <5% F B i C M >5p ; EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile 'AMPHIBOLES 1 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 Non-Identifiec Actinolite NSD = No Structures Detected

NYC-WTC_000201090