TEM Asbestos air sample results, NYC BOE, Oct 2001

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1936 Lab Group #: 5820 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 9 Grid Opening Size: 0.01124 Client Sample #: 9 Area Examined: 0.04496 mm- GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4

Analysis Performed By: MARK PEYSAKHOV

GO. Structure Structure Type Length ID of Structure N or 4 EDS No (Nonadb F ! B C M >=05 p : ■=5iJ Chrys Amphibole Nonasb Ambig/ND No Coord <5u Elements)

Struct = > 0.5)1 >5:1 Aspect Ratio Grid acceptance:

9= Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals laboratory identification criteria observed <10% particulate coverage >50% coverage ate

9= EDS spectrum conforming to laooratory least 20 unfoldeo or overlapped grid squares <5% _______ ( F j B C M >5u holes or opaque areas identification criteria observed Chrysotile AMPHIBOLES Amphibole F = Single Fiber Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous ' I C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos j Tremolite M = Matrix i Nor.-Identified i Actinolite NSD = No Structures Delected

CITY_21MC100_003106093

NYC-WTC_000185129