TEM Asbestos air sample results, NYC SCA, Oct 2001

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC SCA Volume filters): 1936 Lab Group #: 5801 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 9 Gr-id Opening Size: .0.01124 Client Sample #: 9 ATeaJNmTriiie± 0.04496 mm^- GRID BOX: Magnification: 20,000 GRID ID: # Grid Openings: 4 Accelerating Voltage: too KeV

Analysis Performed By: ROMAf^PEYSAKHOV

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

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Struct = > 0.5g .> 5:1 Aspect Ratio Grid acceptance: ^/= Positive diffraction pattern properfies conforming to undissolved 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 C M >5p n/= EDS spectrum conforming to laboratory holes'or opaque areas identification criteria observed Chrysotile i AMPHIBOLES Amphibole F = Single Fiber Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) I Anthophyllite Non-Asbestos Tremolite M = Matrix Non-Identified i Actinolite NSD = No Structures Detected

CITY_21MC100_003100041

NYC-WTC_000182624