TEM Asbestos air sample results, NYC BOE, Feb 2002

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Skeet Client Name: NYC BOE Volume (liters): 1816 Lab Group =: 6660 Filter Type / Filter Area: MCE 3S5mm- Lab Sample #: 15 Grid Opening Size: 0.01 124 Client Sample #: 18 Area Examined: 0.04496 mm-

GREP BOX: Magnification: 20,000 GRIDED: Accelerating VYltage: 100 KeV # Grid Openings: 4 Analysis Bate: 2/13/02

Analysis Performed By: ROMAN PEYSAKHOV

GO. Structure Structure Type Length ID of Structure N or N EDS No (Nonadb B C M >=05 p '=5p Chrys Amphibole Nonasb AmbigfMD No Coord <5u Elements) TUZT If

IS —-

Struct = > 0.5g .> 5:1 Aspect Ratio Grid acceptance: Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded T otals laboratoY identification criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% [ N= ECS spectrum conforming to laboratory holes or opaque areas 1 i F j B I C i M j >5u identiiication criteria observed Chrysotile ) AMPHIBOLES .Amphibole : F = Single Fiber Amosite 3 = Sundie (<3 fibers <1 fiber diameter apart Crocidolite .Ambiguous i C = Cluster (->3 Intersections) Anthophyllite Non-Asbestos i Tremolite M = Mstrix 1 Non-Identified j Actinolite NSO = No Structures Detected

CITY_21MC1OO_OO31O318O

NYC-WTC_000183770