NYC-WTC_000221773

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client iS'ame: NYC BOE Volume (liters): 1840 Lab Group 7444 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 11 Grid Opening Size: 0.01124

Client Sample #: 11 Area Examined: 0.04496 mm‘

GRID BOX: / Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 4/17/02 Analysis Performed By: ^/f

ROMAN PEYSAKHOV

GO. Structure Structure Type Length ID of Structure N or N EDS (Nonadb No F B C M >=0571 :>=5|J Chrys Amphibole Nonasb Ambig/ND No Coord Elements) <5m 7t^ _K_ rz? g -fZ__ co r=

Struct = >0.5p >5:1 Aspect Ratio Grid aaeptance: Positive diffraction pattern propenies conforming to <50% undissolved filler, overiapped or folded Totals laboratory identification criteria observed <10% paniculate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% F B C M i >5p \'= EDS spectrum conforming to laboratory holes or opaque areas Identification criteria observed Chrysotile AMPHIBOLES Amphibole F = Single Fiber Amosite S = Bundle (<3 fibers <1 fiber diameter apan Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix Actinolite Non-Identified NSD = No Structures Detected

CITY_21MC100_002888663

NYC-WTC_000221773