TEM Asbestos air sample results, WC BOE, Nov 2001

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: WC BOE Volume (liters): 1936 Lab Group #: 5897 Filter Type / Filter Area: MCE 385 mm* Lab Sample #: 19 Grid Opening Size: 0.01124 Client Sample #: 19 Area Examined: 0.04496 mm- GRID BOX: 73^ Magnification: 20,000 GRID ED: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 11/15/01

Analysis Performed By: MICHAEL GORYCKI

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

ZlZu /f /I

6

Struct = > 0.5g _> 5:1 Aspect Ratio Grid acceptance: y'= Positive diffraction pattern properties conforming to <50% undissoived filter, overlapped or folded Totals <10% particulate coverage >50% coverage ate laboratory identification criteria observed least 20 unfolded oroveriapped grid squares <5% F B C M >5u 9= EDS spectrum conforming to laboratory holes or opaque areas identification critena observed Chrysotile AMPHIBOLES Amphibole F = Single Fiber Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos | M = Matnx Tremolite Actinolite Non-Identified NSD = No Structures Detected

CITY_21MC100_003106486

NYC-WTC_000185392