NYC-WTC_000202429

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters); 1920 Lab Group #: 9088 Filter Type / Filter Area: MCE 385 min^ Lab Sample #: 1 Grid Opening Size; 0.01124 Client Sample #: Area Examined: 0.04496 mm^

GRID BOX: 4^ Magnification: 20,000 GRIDID: WK Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 11/11/02

Analysis Performed By: ROMAN PEYSAKHOV 1 ii ID of Structure N or EDS GO. Structure Structure Type Length ij (Nonadb No F B C M >=05 M >=5|j Chrys Amphibole Nonasb Ambig/ND No Coord <5m Elements)

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Photo No, (from 1 in 5 asbestos containing samples) Grid acceptance: Struct = > 0.5p > 5:1 Aspect Ratio <50% undissolved filter, overlapped or folded Totals Positive diffraction pattern properties conforming to <10% particulate coverage >50% coverage ate laboratory identification criteria observed least 20 unfolded or overlapped grid squares <5% F B C M >5ij holes or opaque areas > - EDS spectrum conforming to laboratory Chrysotile identification criteria obsen/ed AMPHIBOLES Amphibole F = Single Fiber Amosite B = Bundle (<3 fibers <1 fiber diameter apart 1 Crocidolite Ambiguous C = Cluster (>3 Intersections) i Anthophyllite j Non-Asbestos Tremolite M = Matrix I NSD = No Structures Detected Actinolite : Non-Identified

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NYC-WTC_000202429