TEM Asbestos air sample results, NYC BOE, Feb 2002

NYC 9/11 Public Portal Document

TEM Asbestos fair) Count Sheet Client Name: NYC BOE Volume (liters): 1809 Lab Group 6610 Filter Tvpe / Filter Area: MCE 385 mm- Lab Sample #: 14 Grid Opening Size: 0.01124 Client Sample #: 17 Area Examined: 0.04496 mm- GRID BOX: Magnification: 20,000 GRID ID : Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 2/9/02

Analysis Performed By: C MARK PEYSAKHOV

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

1i I I Struct = > 0.5li >5:1 Aspect Ratio Grid acseptance: Positive diffraction pattern properties conforming to <50% undissolveo filter, overlapped or folded Totals laboratory identification criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or overiaoped and squares <5% f i F i B ) C j M ! >5u EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile i amphiboles' Amphibole i F = Single Fiber Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous I i C = Cluster (>3 intersections) : Anthophyllite Non-Asbestos I i Tremolite M = Matrix Non-Identified ! Actinolite i i NSD = No Structures Detected

CITY_21MC100_003103084

NYC-WTC_000183743