TEM Asbestos air sample results, NYC BOE, Dec 2001

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: WC BOE Volume /liters): 1952 Lab Group #: 6051 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 19 Grid Opening Size: 0.01124 Client Sample #: 19 Area Examined: 0.04496 mm^

GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 12/6/01

Analysis Performed By: MARKPEYSAKHOV

GO. 1 Structure Structure Type Length ID of Structure N or '/ EDS ! No (Nonadb F B C M >=05 [J :>=5|J Chrys Amphibole Nonasb Ambig/ND No Coord <6p Elements)

■c?

Struct = > 0.5(1 5:1 Aspect Ratio Grid acceptance: 9= Positive diffraction pattern properties conforming to <50% undissoh/ed filter, overlapped or folded Totals laboratory identification criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% F B i C I M >5p 9= EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile : AMPHIBOLES Amphibole F = Single Fiber Amosite 0 = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix Non-Identified j Actinolite NSD = No Structures Detected

CITY_21MC100_003104540

NYC-WTC_000184036