TEM Asbestos air sample results, NYC BOE, Apr 2002

NYC 9/11 Public Portal Document

TEM Asbestos fair) Comnt Sheet Client Warne: NYC BOE Volume filters): 1960 Lab Group #: 7412 Filter Tvpe ./ Filter Area: .VICE 385 mm’ Lab Sample #: 2 Grid Opening Size: 0.01124 Client Sample #: 02 Area Examined: 0.04496 mm- GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 4/14/02

Analysis Performed By: .MARK PEYSAKHOV

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

Struct = > O.Sp >5.1 Aspect Ratio Grid acceptance: a/= 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 ’5u V= EDS spectrum coniorming to laboratory holes or opaque areas identification criteria observed Chrysotile i AMPHIBOLES , Amphibole F = Single Fiber ) Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) ' Anthophyllite । Non-Asbestos M = Matrix Tremolite Actinolite Non-Identified NSO = No Structures Detected

CONFIDENTIAL, CITY_21MC100_009505449 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000178915