TEM Asbestos air sample results, NYC BOE, Feb 2002

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1S24 Lab Group #: 6696 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 9 Grid Opening Size: 0.01124 Client Sample #: 12 Area Examined: 0.04496 mm- GRID BOX: /; Masnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 2/16/02

____ i Analysis Performed By: NLARK PEYSAKHOV

GO. Structure Structure Type Length ID of Structure N or 9 EDS No (Nonadb h B C M >=05 u :>=5p Chrys Amphibole Nonasb Ambig/ND No Coord <5|j Elements)

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H Struct = > 0.5p >5:1 Aspect Ratio Grid acceptance: y = Positive diffraction pattern properties conforming Io <50% undissolved filter, overlapped or folded Totals <10% particulate coverage >50% coverage ate laboratory identification criteria observed least 20 untolded or ovsnapped and squares <5% ' y= EDS spectrum conforming ;o iaboratory boles or opaque areas L P P i C j M I >=u identification criteria observed Chrysotile I 1 ■AMPHIBOLES Amphibole ? = Single Fiber Arriosite 3 = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous Anthophyllite Non-Asbestos C = Cluster i>3 intersections) Tremolite I M = Matrix NSD = No Structures Detected Actinolite Non-Identifled ... i. CITY_21MC100_003103247

NYC-WTC_000183799