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): 1936 Lab Group #: 6165 Filter Type / Filter Area: MCE 385 ram- Lab Sample #: 4 Grid Opening Size: 0.01124 Client Sample #: Area Examined: 0.04496 mm-

GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 12/21/01

Analysis Performed By: ROMAN PEYSAKHOV

GO. Structure Structure Type Length 10 of Structure N or V EDS (Nonadb No F B C M >=05 pi '=5(j Chrys j Amphibole Nonasb Ambig/ND No Coord <5u Elements)

IC- ZZFzEJSI /I

-

Struct = > 0 ;u > 5: i Aspect Ratio Grid acceptance:

v= Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded T otals laboratory identification oritena observed <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% F B C M >5u v= EDS spectrum conlorming to laOoratory holes or opaque areas ideniitication criteria observed Chrysotile AMPHIBOLES Amphibole F = Single Fiber Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster {>3 Intersections! Anthophyllite j Non-Asbestos Tremolite M = Matrix j Non-Identified Actinolite NSC = No Structures Detected __L__

CITY_21MC100_003104957

NYC-WTC_000184322