TEM Asbestos air sample results, NYC BOE, Dec 2001

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1944 Lab Group #: 6117 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 6 Grid Opening Size: 0.01124 Client Sample #: 6 Area Examined: 0.04496 mm*

GRID BOX: Magnification: 20,000 GRID ID: # Grid Openings: 4 22D Accelerating Voltage: Analysis Date: 100 KeV 12/15/01

Analysis Performed By: jyv// ROMAN PEYSAKHOV

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

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Struct = > O.ip > 5:1 Aspect Ratio Grid acceptance: \= Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals iabcratory identification criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% F B C M >5u N= EDS spectrum conforming to laboratory holes or opaque areas Identification criteria observed Chrysotile AMPHIBOLES Amphibole F = Single Fiber Amosite B = Bundle i<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos M = Matrix Tremolite Actinolite Non-Identified NSD = No Structures Cetectad

CITY_21MC100_003104814

NYC-WTC_000184228