TEM Asbestos air sample results, NYC SCA, Oct 2001

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYCSCA Volume (liters): 1936 Lab Group #: 5801 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: .18 Grid Opening Size: 0.01124 Client Sample #: 18 - Area Examined: 0.04496 mm^ GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4

Analysis Performed By: ROMAN PEYSAKHOV

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

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Struct = > 0.5u .>5:1 Aspect Ratio Grid acceptance: >/= Positive diffraction pattern properties conforming to <50% undissolved filter, ovedapped or folded Totals laboratory identification criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded oroveriapped grid squares <5% F B C M >5p EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chi-ysorile AMPHIBOLES Amphibole F = Single Fiber Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite ' Non-Asbestos M = Matrix Tremolite Actinolite Non-Identified NSD = No Structures Detected

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