TEM asbestos air sample data sheet, Sample 9, Aug 2002

NYC 9/11 Public Portal Document

TEM Asbestos fair) Count Sheet Client Name: NYC BOE Volume (liters): 1960 Lab Group #: 8745 Filter Type / Filter Area: MCE 385 mm^ Lab Sample #: 9 Grid Opening Size: .0.01124 Client Sample #: 9 Area Examined: 0 04496 mm^

GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV ft Grid Openings: 4 Analysis Date: 8/24/02

Analysis Performed By: MARK PEYSAKHOV

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

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Struct = > 0 5pi >5 I Aspect Ratio Gnd acceptance <1= Positive diffraction pattern properties conforming to ^hdissolved filter, overlapped or folded Totals laboratory identificabon cnlena observed <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped gnd squares <5% F B C M >5m A- EDS spectrum conforming to laboratory holes or opaque areas Identification criteria observed Chrysotile AMPHIBOLES Amphibole F = Single Fiber Amosite B = Bundle (<3 libers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos Tremolite M = Matnx Non-Identified Actinolite NSD = No Structures Detected

CITY_21MC100_003042079

NYC-WTC_000196603