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 filters): 1952 Lab Group #: 6121 Filter Type / Filter Area: MCE 385 ram- Lab Sample #: 16 Grid Opening Size: 0.01124 Client Sample #: 16 Area Examined: 0.04496 mm*

GRID BOX: Magnification: 20.000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 12/17/01

Analysis Performed By: ROMAN PEYSAKHOV

GO, Structure Structure Type Length ID of Structure N or 'I EDS No >=05 U I >=5|J (Nonadb F B C M Chrys Amphibole Nonasb Ambig/NO Nc Coord <5p ! Elements)

/1/2»1 yTz —— L (/

Strutt = > 0.5p ->5:1 Aspect Ratio Gnd acceptance:

v= Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or (aided Totals laboratory identification catena observed <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% F B I C M EDS spectrum conforming tc laboratory holes or opaque areas ---- 1__ ideniifcatlon critena observed Chrysotile AMPHIBOLES Amphibole F = Single Fiber Amosite B = Bundle \<3 fibers <1 fiber diameter apart I Crocidolite Ambiguous i Anthophyllite C = "luster (>3 intersections) Non-Asbestos 1 Tremolite M = Matnx Non-Identified ; Actinolite NSD = No Structures Detected

CITY_21MC1OO_OO31O4853

NYC-WTC_000184255