NYC-WTC_000189852

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1818 Lab Group #: 6600 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 16 Grid Opening Size: 0 01124 Client Sample #: 19 Area Examined: 0 04496 mm-

GRID BOX: Magnification: 20,000 GRID ED : Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 2/8/02

Analysis Performed By: MARK PEYSAKHOV

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

o 3' /- —

Struct = > 0 5)1 >5 I Aspect Ratio Gnd acceptance V= Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals laboratory identification criteria observed <10% particulate coverage >50% coverage ale least 20 unfolded or overtapped grid squares <5% F B C M >5p ^= EDS spectrum conforming to laboratory holes or opaque areas Identification criteria observed Cluysotile AMPHIBOLES Amphibole F = Single Fiber Amosite B = Bundle (<3 fibers <1 fiber diameter apart ; Crocidolite Ambiguous C = Cluster (>3 Intersections) ' Anthophyllite Non-Asbestos M = Matrix Tremolite Actinolite Non-Identified NSD = No Structures Detected

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NYC-WTC_000189852