NYC-WTC_000220875

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: 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 #: 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; ROMAN PEYSAKHOV

GO. Structure Structure Type Length ID of Structure N or EDS {Nonadb No F B C M >=05 p >=5^1 Chrys Amphibole Nonasb Ambig/ND No Coord <5m Elements)

r rt? rz-' If /Si® -U__ (I—

Struct = >0.5p >5:1 Aspect Ratio Grid acceptance: V = Positive diffraction pattern properties conforming to "50% undissolved filter, overtapped or folded Totals laboratory identification criteria observed ":10% particulate coverage >50% coverage ate least 20 unfolded or overiapped grid squares <5% F B C M ! >5p EDS spectrum conforming to laooratory holes or opaque areas identification criteria observed Chrysotile AMPHIBOLES Amphibole F = Single Fiber Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix Non-Identified Actinolite NSD = No Structures Detected

CITY_21MC100_000621903 NYC-WTC_000220875