TEM Asbestos air sample results, NYC BOE, Dec 2001

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOL Volume (liters): 1928 Lab Group #: 6064 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 20 Grid Opening Size: 0.01124

Client Sample 20 Area Examined: 0,04496 mm-

GRID BOX: S Magnification: 20,000 GRIDED: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 12/8/01

A

Analysis Performed By: MARK PEYSAKHOV

GO. Structure | Structure Type Length ID of Structure N or v i EDS No I F B C M >=05 p I '=5|j Chrys Amphibole NonasD ^bi^ I No Coord <5u I Elements)

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Struct = >0.5p >5:l Aspect Ratio Grid acceptance: 4= Positive aiffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals <10% particulate coverage >50% coverage ate laboratory identificatlori criteria observed least 20 unfolded or overlapped grid squares <5% F B C M >5tJ V - EDS spectrum conforming to laboratory Holes or opaque areas Identification critena observed Chrysotile i AMPHIBOLES Amphibole r = Single Fiber Amosite E = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster {>3 Intersections) Anthophyllite Non-Asbestos M = Matrix NSD No Structures Detected Tremolite Actinolite Non-Identified t CITY_21MC100_003104624

NYC-WTC_000184093