NYC-WTC_000202847

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: ATC Volume (liters): 3900 Lab Group #: 9035 Filter Type / Filter Area: MCE 385 mm^ Lab Sample#: 4 Grid Opening Size: 0.01124

Client Sample #: 4 Area Examined: 0.24728

GRID BOX- Magnification: 20,000 GRID ID: Accelerating Voltage: too KeV # Grid Openings: 22 Analysis Date: 10/29/02

Analysis Performed By: ROMAN PEYSAKHOV

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

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I___ I ! ! '' Photo No. (from 1 in 5 asbestos containing samples) Gnd acceptance: Struct - > G',5j >5:1 Aspect Ratio <50% undissolved filter, overlapped or folded Totals 3= Positive diffraction pattern properties conforming to <10% particulate coverage >50% coverage ate laboratory identification catena observed least 20 unfolded or overiapped grid squares <5% F >5u B C I M holes or opaque areas \ = EDS spectrum conforming to laboratory Chrysotile --- i--- identification criteria ooserved .AMPHIBOLES Amphibole | F = Single Fiber Amosite I Ambiguous 3 = Bundle (<3 fibers <1 fiber diameter apart Crocidolite ! I C = Cluster !>3 Intersections) Anthophyllite I Non-Asbestos Tremolite M = Matrix , Non-Identified Actinolite NSD = No Structures Detected

CITY_21MC100_003069317

NYC-WTC_000202852