TEM Asbestos air sample results, NYC BOE, Jan 2002

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume filters): 1840 Lab Group #: 6409 Filter Type / Filter Area: MCE 385 mm^ Lab Sample #: 15 Grid Opening Size: 0.01124 Client Sample #: 15 Area Examined: 0.04496 mm-

GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 1/23/02

Analysis Performed By MARK PEYSAKHOV

GO, . structure Structure Type Length ID of Structure N or ' A EDS No ■ (Nonadb F B C >=05 p ~ >=5m Chrys Amphibole Nonasb Ambig/ND Elements) No Goord <5p

J A ay X

Struct = > 0,5pi .> 5:1 Aspect Ratio Grid acceptance:

■\'= Pcsitive diffraction pattern properties conforming to <50% undissolved filter, overlapped 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 >5|j 9= EDS spectrum conforming to laboratory . holes or opaque areas identification criteria observed Chrysotile AMPHIBOLES ) Amphibole F - Single Fiber Amosite 3 = Bundis i<3 libers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Ahthophyliite I Non-Asbestos Tremolite r M = Matrix : Non-Identified j I Actinolite NSD = Nc Structures Detected

CONFIDENTIAL, SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008 CITY_21MC100_014660218

NYC-WTC_000174781