TEM Asbestos air sample results, NYC BOE, Feb 2002

NYC 9/11 Public Portal Document

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TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1816 Lab Group #: 6843 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 1 Grid Opening Size: 0,01124 Client Sample #: 04 Area Examined: 0,04496 mm-

GRID BOX: Ma2nitlcation: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 2/27/02

Analysis Performed By: MARK PEYSAKHOV

GO, Structure Structure Type Length ID of Structure Nor N EDS (Nonadb No F 3 0 M '=05 jj Chrys Amphibole Nor.asb Ambig/ND No Coord Elements) ! <5u

Y" kT'x'' T3

Struct = > 0,5p >5:1 Aspect Ratio Grid acceptance:

2= Positive diffraction pattern properties conforming to <50% undissclrec filter, overlapped or folded Totals <10% particulate coverage >50% coverage ale laboratory identification criteria observed least 20 unfolded or overlapped grid squares <5% 1 F i B C M >5p N= EDS spectrum conforming to a bora toy holes or opaque areas identification criteria observed Chrysotile AMPHIBOLES i Amphibole [ F = Single Fiber Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>j Intersections) Anthophyllite Non-Asbestos Tremolite J_____________ M = Matrix ! Non-Identified j Actinolite NSD = No Structures Detected

CITY_21MC100_0 03103521

NYC-WTC_000183912