TEM Asbestos air sample results, NYC BOE, Dec 2001

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOP Volume (liters): 1936 Lab Group #: 6105 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 19 Grid Opening Size: 0.01124

Client Sample #: 19 Area Examined: 0.04496 mm-

GRID BOX: iMagiiification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openin2s: 4 Analysis Date: 12/15/01

Analysis Performed By: MARKPEYSAKHOV

GO, Structure Structure Type Length ID of Structure N or y EDS No >=05 p ’>=51J INonadb F B C M Chrys Amphibole Nonasb Ambig/ND No Coord I <5p Elements)

' I— I

Struct = > O.Sp > 5:! Aspect Ratio Grid acceptance: y = 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 S C i M >5p EDS spectrum coniorming to laboratory holes or opaque areas idemification criteria observed Chrysotile AMPHIBOLES Amphibole F = Single Fiber Amosite E = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos Tremolite M = Matnx Non-Identified Actinolite NSD = No Structures Detected

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NYC-WTC_000184220