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 #: 6078 Filter Type / Filter Area: MCE 385 mm- Lab Sample 20 Grid Opening Size: 0.01124 Client Sample #: 20 Area Examined: 0.04496 mnC

GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 12/11/01

Analysis Performed By: ROMAN PEYSAKHOV

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

/T

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a Struct = > 0.5p >51 Aspect Ratio Grid acceptance: 7= Positive diffraction pattern properties conforming to <50% undissolved filler, overlapped or folded Totals laboratory identification criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or overiapped grid squares <5% F B C M >5p v'= EDS spectrum conforming to laboratory holes or opaque-areas identification criteria observed Chrysotile iAMPHIBOLES j Amphibole F = Single Fiber Amosite E = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 intersections) Anthophyllite Non-Asbestos T remolite M = Matrix Non-Identified Actinolite NSD = No Structures Detected

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