TEM Asbestos air sample results, NYC BOE, Dec 2001

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NN'C BOE Volume (liters): 1960 ’ Lab Group #: 6117 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 19 Grid Opening Size: 0.01124 Client Sample #: 19 Area Examined: 0.04496 mm^

GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 .KeV # Grid Openings: 4 Analysis Date: 12/15/01

Analysis Performed By: ROMAN PEYSAKHOV

GO, Structure Structure T ype Length ID Of Structure N or N EDS No >=05 u (Noradb F B C M '=51J Chrys Amphibole Nonasb I Ambig/ND No ■ Coord <5u Elements)

E /(

Struct = > 0.5|u > 5:1 Aspect Ratio Grid acceptance: 7 = Positive diffraction pattern properties conforming to <50% undissoived filter, ovedapped 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 >5u y= EDS spectrum conforming to laboratory holes or opaque areas identilication criteria observed Chrysotile AMPHIBOLES : Amphibole F = Single Fiber Amosite B - Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite 1 Non-Asbestos I Tremolite I M = Matrix Non-Identified Actinolite NSQ = No Structures Detected

CITY_21MC100_003104827

NYC-WTC_000184239