TEM Asbestos air sample results, NYC BOE, Mar 2002

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1808 Lab Group #: 7276 Filter Type / Filter Area: MCE 385 mm^ Lab Sample #: 2 Grid Opening Size: 0.01124 Client Sample #: 05 Area Examined: 0.04496 mm^

GRID BOX: Mannification: 20,000 GRID ID: Acceleratin2 Voltage: too KeV # Grid Openings: 4 Analysis Date: 3/31/02

Analysis Performed By: _____ / n /___________ ROMAN PEYSAKHOV

GO. Structure Structure Type Length ID of Structure NorN EDS (Nonadb No F B C M >=05 M >=5iJ Chrys Amphibole Nonasb Ambig/ND No Coord , <5u Elements)

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Struct = > 0.5g >5:1 Aspect Ratio Grid acceptance: Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals <10% particulate coverage >50% coverage ate laboratory identification criteria observed '/= EOS spectrum conforming to laboratory least 20 unfolded or overlapped grid squares <5% F B c M >6p holes or opaque areas identification critena observed Chrysotile AMPHIBOLES 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-Identified Actinolite NSD = No Structures Detected

CITY_21MC100_003102928

NYC-WTC_000183652