TEM Asbestos air sample results, NYC BOE, Nov 2001

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1944 Lab Group #: 5904 Filter Tvpe / Filter Area: MCE 385 mm- Lab Sample #: 19 Grid Opening Size: 0.01124 Client Sample #: 19 ■ Area Examined: 0.04496 mm-

GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 11/17/01

Analysis Performed By: Zh MICHAEL GORYCKI

GO. Structure Structure Type Length ID of structure N or v EDS (Nonadb No F B C I M >=05 p ) •=5|j Chrys Amphibole Nonasb AmbigyND No Coord <5p Elements)

A/S P j A A

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Struct = > 0.5u > 5:1 Aspect Ratio Grid acceptance: Positive 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 j >5u y= EDS spectrum conforming to laboratory holes or opaque areas identification critena observed Chrysotile -AMPHIBOLES Amphibole j F = Single Fiber .Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous I C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos i Tremolite M = Matrix Non-Idennfted j Actinolite NSD = No Structures Detected

CITY_21MC100_0 03106515

NYC-WTC_000185409