TEM Asbestos air sample results, NYC BOE, Mar 2002

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): I <S I 6 LabJJroupJ^ 6887 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 25 Grid Opening Size: 0.01 124

Client Sample #: 28 Area Examined: 0,04496 mm-

GRID BOX: < Magnification: 20.000 GRID ID. Accelerating yoha^ 100 KeV # Grid Openings: 4 Analysis Date: 3/1/02

Analysis Performed By: MARK PEYSAKHOV

GO I structure I Structure Type Length ID of Structure Nor r EDS 1 No I r ' - I - ' ■ ■ i (NcnadO -BCG >=05 u ) >=5|j j Chrys I Amphiboie । Nonaso Ambig/ND No Coord <5p Elements)

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i Struct = > 0,5u >5:1 Aspect Ratio Gnd acceptance:

B = Positive diffraction pattern properties conforming to :50% undissolved filter, overlapped or folded Totals :10% particulate coverage >50% coverage ate laboratory identification criteria observed

v= EDS spectrum conforming to laboratory least 20 unfolded or overlapped grid squares <5% f holes or opaque areas f Chrysotile 1 n Ki_£ M >5p

identification criteria observed i ------- 1------- AMPHIBOLES Amphibole = = Single Fiber Amosite 3 = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous ; i C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix Actinolite Non-Identified NSD = No Structures Detected

CITY_21MC100_003102202

NYC-WTC_000183169