TEM Asbestos air sample results, NYC BOE, Apr 2002

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1840 Lab Group 7291 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 9 Grid Opening Size: 0.01124 Client Sample #: 09 Area Examined: 0.04496 mm-

GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 4/1/02 Analysis Performed By: aZ

ROMAN PEYSAKHOV

GO. Structure Structure Type Length ID of Structure N or s' EDS j No (Nonadb F B C M >=05 y Chrys Amphibole Nonasb Ambig/NO No Coord <5m Elements)

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! ! i___ L i r 1 i j___ L Struct = > 0.5u > 5:1 .Aspect Ratio Grid acceptance: \'= Positive diffraction pallern 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 I F 1 B j C I M I >5p \= EDS spectrum conforming to laboratory holes or opaque areas j. identification criteria observed Chrysotile i AMPHIBOLES Amphibole j F = Single Fiber Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix I Non-Identified ‘ Actinolite NSD = No Structures Detected

CONFIDENTIAL, CITY_21MC100_003470761 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000176720