TEM Asbestos air sample results, NYC BOE, Nov 2001

NYC 9/11 Public Portal Document

z TEM Asbestos (air) Couct Sheet Client Name: NYC BOE Volume (liters): 1944 Lab Group #: 5975 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: Grid Opening Size: 0.01124

Client Sample #: Area Examined: 0.04496 mm-

GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 11/27/01

Analysis Performed By: PV ROMAN PEYSAKHOV

GO, f Structure Structure Type Length ID of Structure N or 7 EDS No (Nonadb F B C M ■=05m Chrys Amphibole Nonasb AmBig/ND No Coord <5p Elements)

f 32^ V zc A = if ((

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j ; T I [ [ J L I '

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LJ__--- L i i I I ) Struct = > 0.5u >5:1 Aspect Ratio Grid accspiance:

Z Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals <10% particulate coverage >50% coverage ate laboratory identification criteria observed Z EDS spectrum conforming to laboratory least 20 untolaed or overtapped grio squares <5% doles or opaque areas F~fB C I M i >5p identification criteria observed Chry'sotile AMPHIBOLES : Amphibole r = Single Fiber Amosite 3 = Bundle {<3 fibers <1 fiber diameter apan ! Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix Noil-Identified Actinolite NSD = No Structures Detected

CITY_21MC100_003106752

NYC-WTC_000185512