TEM Asbestos air sample results, NYC BOE, Dec 2001

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1920 Lab Group #: 6068 Filter Type / Filter Area: MCE 385 mm* Lab Sample #: 6 Grid Opening Size: 0.01124 Client Sample #: Area E.xamined: 0.04496 mm- GRID BOX: Magnification: 20,000 GRIDED: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 12/9/01

Analysis Performed By: ROMAN PEYSAKHOV

GO. Structure Structure Type Length ID of Structure N or EDS No (Nonadb F B M >=05 M >=5|j Chrys Amphibole Nonasb Ambig/ND No Coord <51J Elements)

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Struct = > 0.5(1 > 5:1 Aspect Ratio Grid acceptance: 'i- Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals laboratory identification criteria observed <10% particulate coverage >50% coverage ate

EDS spectrum conforming to laboratory least 20 unfolded or overlapped grid squares <5% holes or opaque areas fTb c M >5p

identification criteria observed Chrysotile AMPHIBOLES ■ Amphibole r = Single Fiber i Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous’ C = Cluster (>3 Intersections) i Anthophyllite Non-Asbestos ; T remolite M = Matrix Non-Identified ' Actinolite NSD = No Structures Detected

CONFIDENTIAL, CITY_21MC100_003467402 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000180701