TEM asbestos air sample results, NYC BOE, June 2002

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1920 Lab Group #: 7936 Filter Type / Filter Area: MCE 385 mm^ Lab Sample #: 15 Grid Opening Size: 0.01124 Client Sample #: 15 Area Examined: 0.04496 mm^ GRID BOX: Magnification: 20,000 GRID ID: <ZZ Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 6/2/02

Analysis Performed By: MARK PEYSAKHOV

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

Struct = > 0.5n > 5:1 Aspect Ratio Grid acceptance: ^'= Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals laboratory 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 Famphiboles i Amphibole F = Single Fiber Amosite j B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite ! Ambiguous C = Cluster (>3 Intersections) Anthophyllite i Non-Asbestos Tremolite M = Matrix Non-Identified Actinolite NSD = No Structures Detected

CITY_21MC100_0 03105320

NYC-WTC_000184582